JP6629583B2 - Chair - Google Patents

Description

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

  As a chair on which luggage can be loaded, for example, a chair provided with a mounting plate below a seat plate, such as a chair described in Patent Literature 1, has been proposed.

Japanese Utility Model Publication No. 03-7760

  In a chair in which a seating portion on which a user sits around a rotation axis near the installation surface of the chair swings back and forth, if a loading plate as in Patent Document 1 is provided, the loading plate tilts at the time of swinging, and However, there is a problem that the sheet is easily dropped from the mounting plate.

  An object of the present invention is to provide a chair that can suppress the fall of luggage.

  A first aspect of the present invention is a chair, which extends upward from a base disposed on an installation surface of the chair and extends at least from a first position to a second position around a rotation axis provided on the base. A body portion having a leg portion configured to be able to swing between, and a seat portion provided on the leg portion and having a seating surface on which a user can sit, and provided below the seat portion; A shelf on which luggage can be placed, and a connecting portion connecting the main body and the shelf so that the shelf moves with the leg when the leg swings. The connecting portion connects the main body portion and the shelf portion so that the relative position between the shelf portion and the leg portion can be changed, and the leg portion is located at the first position. When the leg portion is located at the second position, the shelf portion is located at the second position. The angle of inclination with respect to the quasi-is smaller than the angle of the swing when the leg is swung from the first position to the second position, a chair.

  In such a chair, the angle of the inclination of the shelf portion associated with the swing is smaller than the angle of the swing when the leg swings. Therefore, when the leg swings while the luggage is placed on the shelf, it is possible to suppress the luggage from falling off the shelf due to the inclination of the shelf.

  According to a second aspect of the present invention, in the chair according to the first aspect, the connecting portion is provided on a connecting shaft provided on any one of the leg portion and the shelf portion, and on the other side different from the one. And a bearing for rotatably holding the connection shaft.

In such a chair, the connection between the shelf and the legs can be realized by holding the connection shaft with the bearing.
Further, in the chair according to the first and second aspects described above, further, when the leg portion swings from the first position to the second position, the leg portion is located at the second position. The movement of the shelf is controlled such that the angle of inclination of the shelf relative to the reference is smaller than the angle of swing when the leg swings from the first position to the second position. It may be configured to include a movement control unit.

  For example, the movement control section has one end rotatably connected to an installation section provided on the installation surface, and the other end rotates at a position spaced from a connection position with the leg section on the shelf. It is conceivable to adopt a configuration having a four-joint link constituted by a link member that can be connected, the legs, and the shelf.

With such a chair, the inclination of the shelf portion accompanying the swinging of the legs can be controlled by the four-bar links.
In addition, it is conceivable that the movement control unit has a slide mechanism that controls the inclination of the shelf during the movement while guiding the movement of the shelf due to the swing of the leg. .

In such a chair, the inclination of the shelf portion accompanying the swinging of the legs can be controlled by the slide mechanism.
The movement control unit may include a rotation control unit configured to rotate the connection shaft so that the shelf rotates in a direction opposite to the swinging direction with respect to the leg when the leg swings. It is conceivable to have a configuration having

With such a chair, the rotation control unit can control the inclination of the shelf unit accompanying the swing of the leg unit.
Further, in the chair according to the second aspect described above, the shelf may rotate around an axis parallel to the rotation axis, and may contact one or more of the support members that support the shelf from below. And the roller may be configured to rotate and move on the upper surface of the support when the shelf moves with the swing of the leg.

  With such a chair, when the shelves move with the swing of the legs, the rollers reduce the frictional force generated when the shelves move, so that the shelves can move smoothly.

1A is a front view, FIG. 1B is a right side view in a use state, and FIG. 1C is a right side view in a stored state. It is the figure which expanded the principal part of the chair of 1st Embodiment, FIG. 2A is a right side view when a leg is a 1st position, FIG. 2B is a right side when a leg is a 2nd position. FIG. It is the figure which expanded the principal part of the chair of 1st Embodiment, FIG. 3A is a top view, FIG. 3B is a front view. 4A is a schematic right side view illustrating a swing angle and a tilt angle, and FIG. 4B is a schematic right side view corresponding to the first embodiment. It is the figure which expanded the principal part of the chair of 2nd Embodiment, FIG. 5A is a right side view when a leg is a 1st position, FIG. 5B is a right side when a leg is a 2nd position. FIG. It is the figure which expanded the principal part of the chair of 2nd Embodiment, FIG. 6: A is a top view, FIG. 6: B is a front view. It is the figure which expanded the principal part of the chair of 3rd Embodiment, FIG. 7A is a right side view when a leg is a 1st position, FIG. 7B is a right side when a leg is a 2nd position. FIG. It is the figure which expanded the principal part of the chair of 3rd Embodiment, FIG. 8: A is a top view, FIG. 8: B is a front view. It is the figure which expanded the principal part of the chair of 4th Embodiment, FIG. 9A is a right side view when a leg is a 1st position, FIG. 9B is a right side when a leg is a 2nd position. FIG. It is the figure which expanded the principal part of the chair of 4th Embodiment, FIG. 10A is a top view, FIG. 10B is a front view. It is a perspective view showing the chair of a 5th embodiment. FIG. 12A is a front view, FIG. 12B is a right side view in a use state, and FIG. 12C is a right side view in a stowed state. It is a figure which shows the chair of 6th Embodiment, FIG. 13: A is a front view, FIG. 13: B is a right side view in use state, FIG. 13: C is a right side view in storage state. It is a perspective view which shows the chair of a modification.

An embodiment of the present invention will be described below with reference to the drawings.
[1. First Embodiment]
[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. The leg 13 and the seat 15 are examples of the main body in the present invention.

  Hereinafter, for convenience, the configuration of the chair 1 will be described using directions such as front and rear, up and down, and left and right. However, these directions are merely definitions that are limited to the present embodiment for describing the positional relationship between the components. However, the usage mode of the chair 1 is not limited. For example, the chair 1 is configured to swing back and forth with respect to the user, but may be configured to swing left and right. Note that the left and right directions are directions based on a state in which the user is seated on the seat. Therefore, the right side view shown in FIG. 1B shows the left side with respect to the user.

  The base 11 is arranged on the installation surface 3 which is a plane on which the chair 1 is installed. As shown in FIGS. 2A and 2B, the base 11 is provided with a rotating shaft 31 having a length in the left-right direction. The leg 13 is configured to be able to swing back and forth about the rotation shaft 31.

  The base 11 has a space 11a into which the legs 13 can be inserted. The space 11 a is a hole formed in the base 11, the upper part of which is open, and the rear contact surface 33, which constitutes the hole, and the lower contact surface 35, which are lower, are stoppers for swinging the leg 13. Function as

  The leg 13 is a hollow columnar member and extends upward from the base 11. The leg 13 can be in a state from the state in which the lower end of the leg 13 contacts the lower contact surface 35 as shown in FIG. 2A to the state in which the lower rear of the leg 13 contacts the rear contact surface 33 as shown in FIG. 2B. Rocks between. FIG. 2A corresponds to the chair 1 shown in FIG. 1B, and hereinafter, the position of the leg 13 is also referred to as a first position. FIG. 2B corresponds to the chair 1 shown in FIG. 1C. Hereinafter, the position of the leg 13 is also referred to as a second position.

FIG. 1B shows a use state in which the leg 13 swings rearward to increase the distance to the desk 2, and FIG. 1C shows a state in which the leg 13 swings forward to reduce the distance to the desk 2. The storage state is shown.
The base 11 is provided with a spring 37. The spring 37 urges the leg 13 from the first position toward the second position. When no load is applied from the outside, the leg 13 is moved to the second position by the spring 37. That is, when no load is applied from the outside, the chair 1 is in the stored state in which the seating portion 15 has moved forward.

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.
The shelf portion 17 is provided below the seating portion 15 and includes a frame pipe 43 and a mounting 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 place a load on the placing plate 45 and the frame pipe 43.

  As shown in FIG. 3A, a notch 45 a that is cut rearward is formed at the center in the left-right direction in front of the mounting plate 45. Due to the formation of the notch 45a, a central portion in the left-right direction in front of the frame pipe 43 has a gap between the notch 45a and 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. As shown in FIGS. 2A and 2B, a through hole 19a in the left-right direction is formed in the bearing portion 19. When 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 around the insertion portion 47. The insertion part 47 is an example of a connection shaft in the present invention, and the bearing 19 and the insertion part 47 are examples of a connection part in the present invention. The bearing 19 may be open at the top, and the insertion portion 47 may be configured to be removable from the through hole 19a.

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

  One end of each of the link members 21 is connected to the base 11 so as to be rotatable about the lower shaft 21a. The other end is rotatably connected to the shelf 17 around an upper shaft 21b 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 way, the link member 21, the base 11, the leg 13, and the shelf 17 form a four-bar link.

  The four-bar link here is a link mechanism composed of four links. In the present embodiment, the rotating shaft 31, the insertion portion 47, the upper shaft 21b, and the lower shaft 21a serve as joints. The base 11 is a fixed link, the leg 13 that is 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. The distance between the rotating shaft 31 and the insertion portion 47 is substantially equal to the distance between the upper shaft 21b and the lower shaft 21a, and the intermediate link is a parallel link that moves in parallel.

  Although the link member 21 has an example in which one end is connected to the base 11, the link member 21 may be connected to an installation portion provided on the installation surface 3 separately from the base 11. The position where one end of the link member 21 is connected may be various positions, provided that a four-bar link can be formed. For example, at least the condition includes a position spaced from the rotation axis 31 when viewed from the left and right side surfaces.

  Also, the position on the shelf 17 to which the other end of the link member 21 is connected can be various positions similarly to the one end, provided that a four-bar link can be formed. For example, at least the condition includes a position spaced from a connection position with the leg portion 13 (here, the position of the bearing portion 19) when viewed from the left and right side surfaces.

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

  First, the definition of the swing angle α when the leg 13 swings back and forth and the tilt 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 so as to be larger than the inclination angle β of the shelf 17 of the present embodiment.

FIG. 4A is a diagram viewed from the left side of the chair 1. The swing angle α and the inclination 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 leg 13 and the shelf 17 indicated by a broken line indicate a state in which the leg 13 is at the first position, and the leg 13 and the shelf 17 indicated by a solid line indicate that the leg 13 is at the second position. Is shown.

  The swing angle when the leg 13 swings from the first position to the second position is defined as a swing angle α. The swing angle here is an angle of rotation of the leg 13 about the rotation axis 31. For example, a straight line A passing through the center of the leg 13 at the first position, and a leg A at the second position. 13 and a straight line B passing through the center of the line 13.

  With reference to the shelf 17 when the leg 13 is located at the first position, the inclination angle of the shelf 17 with respect to the reference when the leg 13 is located at the second position is the inclination angle β. The inclination angle β is represented by, for example, 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 be.

  Note that the above-described tilt angle can also be referred to as the rotation angle of the shelf 17 about the horizontal direction. Here, the rotation means an angle of rotation when focusing only on the shelf 17, that is, an angle of rotation of the shelf 17, and a relative position of the shelf 17 with respect to the base 11 or the leg 13. Is not the angle when moving by rotation.

  The method of setting a straight line serving as a reference for measuring the angle is not particularly limited, and a straight line passing through any two points on the shelf 17 can be set. Further, a change in the inclination of the mounting plate 45 may be used as the inclination angle β.

  Next, the actual tilt angle β of the present embodiment will be described with reference to 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 substantially 0 degrees.

  If the shelf 17 is fixed to the leg 13, if 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 dropping of luggage due to the inclination of the shelf 17 caused by the swing of the leg 13.

  In the present embodiment, the movement of the shelf 17 is controlled such that the above-described four-bar link has the inclination angle β smaller than the swing angle α. That is, the four-bar link is an example of the movement control unit of the present invention that controls the movement of the shelf 17.

[1-3. effect]
According to the first embodiment described in detail above, the following effects can be obtained.
(1a) In the chair 1, the inclination angle β of the shelf 17 due to the swing is smaller than the swing angle α when the leg 13 swings. Therefore, when the legs 13 swing while the luggage is placed on the shelf 17, it is possible to prevent the luggage from falling off the shelf 17 or moving to a biased position on the shelf 17. Can be suppressed.

  (1b) Since 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, the shelf portion 17 moves back and forth in conjunction with the swing of the leg portion 13. Moving. Therefore, for example, the shelf 17 is located at the rear even though the leg 13 is at the second position, which hinders the passage of the chair 1 at the rear, or even though the leg is at the first position. However, it is difficult for the shelf 17 to move forward and hinder seating, and it is possible to prevent the shelf 17 from hindering a user or the like.

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

[2. Second Embodiment]
[2-1. Differences from First Embodiment]
In the second embodiment, since the basic configuration of the chair is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences. The same reference numerals as in the first embodiment denote the same components, and refer to the preceding description.

The chair 1a according to the second embodiment will be described with reference to FIGS. 5A and 5B and FIGS. 6A and 6B.
The base 61 has a slide groove 71 formed on the left and right side surfaces thereof, having a length in the front-rear direction and recessed toward the center of the base 61 in the left-right direction. The slide groove 71 is formed so that the center side of the base 61 is vertically larger than the outside.

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

  The bearing 65 has an elongated hole 65 a having a length in the longitudinal direction of the leg 13. In a state where the insertion portion 47 is inserted into the elongated hole 65a, the insertion portion 47 is rotatably held by the bearing portion 65, and the leg portion 13 and the shelf 63 are rotatably connected around the insertion portion 47. . That is, the bearing portion 65 and the insertion portion 47 are an example of the connecting portion of the present invention.

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

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

  Further, since the sliding portion 77 has only a small clearance in the vertical direction with respect to the slide groove 71, displacement of the sliding portion 77 other than 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-back direction, so that the tilt angle of the shelf 63 due to the swing is 0 degrees. That is, the inclination angle β becomes smaller than the swing angle α. Further, 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 at the time of the movement while guiding the movement of the shelf 63 in the front-rear direction due to the swing of the leg 13. . The base 61 in which the slide groove 71 is formed and the sliding portion 77 are an example of the slide mechanism of the present invention.

[2-3. effect]
According to the second embodiment described in detail above, the following effects are obtained in addition to the effects (1a) and (1b) similar to the effects (1a) and (1b) of the above-described first embodiment.

  (2a) The chair 1a controls the movement of the shelf 63 accompanying the swing of the leg 13 by the slide mechanism. Therefore, it is possible to prevent the shelf 63 from moving to an unexpected position due to the swing of the leg 13. Further, since the sliding direction is the front-back direction, the shelf 63 does not move up and down even if the leg 13 swings. Therefore, it is possible to suppress the load placed on the shelf 63 from moving up and down when swinging, and it is possible to highly prevent the load from dropping from the shelf 63.

[3. Third Embodiment]
[3-1. Differences from First Embodiment]
In the third embodiment, since the basic configuration of the chair is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences. The same reference numerals as in the first embodiment denote the same components, and refer to the preceding description.

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

  The shelf 83 differs from the shelf 17 of the first embodiment only in that the connecting piece 51 for connecting to the link member 21 is not formed, and the other configurations are the same as those of the shelf 17. It is.

  The leg 85 is a hollow member similarly to the leg 13 of the first embodiment, and has a through hole 87 penetrating in the left-right direction on both left and right side surfaces. When the insertion portion 47 is inserted into the through hole 87, the insertion portion 47 is rotatably held by the leg 85, and the leg 85 and the shelf 83 are rotatably connected around the insertion portion 47. . That is, the portion of the leg portion 85 where the through hole 87 is formed is an example of a bearing portion, and the portion and the insertion portion 47 are an example of a connecting portion of the present invention.

The chair 1b has a first gear 91, a second gear 93, and a third gear 95. Each of these gears is provided inside the leg 85.
The first gear 91 is a spur gear with the rotary shaft 31 as an axis and teeth cut parallel to the axis. In the present embodiment, the rotation shaft 31 is fixed to the base 81, and the first gear 91 is fixed to the rotation shaft 31. As a result, the first gear 91 cannot rotate with respect to the base 81.

The second gear 93 is a spur gear having the insertion portion 47 as an axis, and is fixed to the insertion portion 47 so as not to rotate with respect to the insertion portion 47.
The third gear 95 is a spur gear having an axis 97 provided on the leg 85 as an axis, and freely rotates about the axis 97. The second gear 93 meshes with both the first gear 91 and the third gear 95.

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

  That is, when the first gear 91, the second gear 93, and the third gear 95 control the rotation of the insertion portion 47, when the leg 85 swings, the shelf 83 swings with respect to the leg 85. It rotates in the direction opposite to the direction of movement. As a result, the inclination angle β is substantially 0 °, which is smaller than the swing angle α. The first gear 91, the second gear 93, and the third gear 95 are examples of a rotation control unit of the present invention.

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

(3a) In the chair 1b, by rotating the insertion portion 47 in the direction opposite to the direction in which the leg 85 swings, it is possible to prevent the shelf portion 83 from being greatly inclined by the swing.
(3b) The first gear 91, the second gear 93, and the third gear 95 are provided inside the leg 85, and the configuration other than the shelf 83 is not exposed to the outside. Therefore, it is possible to reduce the number of components that are displaced when swinging and are exposed to the outside. Therefore, the user's body or luggage hardly comes into contact with such components, and the risk of the swing of the leg 85 and the movement of the shelf 83 being hindered by the contact can be reduced.

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

The chair 1c according to the fourth embodiment 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 embodiment.
The shelf 103 has a pair of left and right support legs 111 formed vertically below the frame pipe 43 and the mounting plate 45 with the base 101 as a center. The support leg 111 has a front end portion and a rear end portion that extend 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 embodiment. With the insertion portion 47 inserted into the elongated hole, the leg portion 13 and the shelf 103 rotate around the insertion portion 47. Linked as possible.

  Each of the rollers 113 rotates about an axis parallel to the rotation axis 31 and contacts the installation surface 3 from above. The installation surface 3 is an example of a support for supporting the shelf 103 from below in the present invention. Note that the support is not limited to the installation surface 3. For example, a plane where the roller 113 contacts the base 101 may be formed. In that case, the base 101 serves as a support. Alternatively, a member different from the base 101 may be installed at a position where the roller 113 contacts, and may be used as a support.

  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, the frictional force is reduced by the roller 113 rotating and moving on the upper surface of the installation surface 3, and the shelf 103 moves smoothly. Since the shelf 103 only moves back and forth on the installation surface 3, even if the leg 13 swings from the first position to the second position, the inclination angle β of the shelf 103 changes with respect to the reference. Move back and forth without.

[4-2. effect]
According to the fourth embodiment described in detail above, the following effects are obtained in addition to the effects (1a) and (1b) similar to the effects of the first embodiment described above.

  (4a) In the chair 1c, when the leg 13 swings, the shelf 103 moves back and forth at a position above the installation surface 3 by a predetermined distance. Therefore, the shelf 103 is not tilted due to the swing, and the load placed on the shelf 103 can be prevented from moving up and down due to the swing, and the dropping of the load can be highly suppressed. Can be.

[5. Fifth Embodiment]
[5-1. overall structure]
As shown in FIG. 11, the chair 121 of the present embodiment includes a base 131 arranged 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 133. The seat 133 includes a seat portion 15 attached to the seat 133 via a seat receiver 135, and a shelf 137 provided below the seat portion 15 and on which luggage can be placed.

In this chair 121, legs 133 are divided into two right and left hands and extend upward, and a shelf 137 is arranged between them.
The swing of the chair 121 and the movement of the shelf 137 will be described with reference to FIGS. A rotation shaft 139 extending in the left-right direction is provided on the base 131 so as to be rotatable with respect to the base 131. The leg 133 is formed integrally with the rotation shaft 139 and swings back and forth about the rotation shaft 139.

  A pair of connecting shafts 141 extending in the left-right direction is provided at both left and right ends of the shelf 137. Since each of the connection shafts 141 is rotatably held by the leg 133, the leg 133 and the shelf 137 are rotatably connected around the connection shaft 141. The portion of the leg 133 that holds the connecting shaft 141 is an example of a bearing in the present invention, and the portion and the connecting shaft 141 are an example of a connecting portion in the present invention.

  Further, a pair of link members 143 provided on the left and right sides of the base 131 are rotatably connected to the base 131 and a connecting piece 145 provided on the lower surface of the shelf 137. The link member 143, the leg 133, and the shelf 137 form a four-bar link.

  In the chair 121, when the leg 133 swings between the first position shown in FIG. 12B and the second position shown in FIG. 12C, the shelf 137 is moved by the four-bar link described above. The inclination of 137 hardly changes. That is, when the leg 133 is located at the first position, the angle of the inclination of the shelf 137 with respect to the reference when the leg 133 is located at the second position is based on the shelf 137 when the leg 133 is located at the second position. It becomes smaller than the swing angle when swinging from the first position to the second position.

[5-2. effect]
According to the fifth embodiment described in detail above, the following effects are obtained in addition to the effects similar to the effects of the first embodiment described above.

  (5a) In the chair 121, the shelf 137 is disposed between the left and right legs 133, so that the space below the seating portion 15 can be widely used, and the shelf 137 is enlarged. The space in which luggage can be placed can be increased.

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

In this chair 151, a leg 163 is divided into two left and right hands and extends upward, and a shelf 167 is disposed therebetween.
A rotation shaft 169 formed integrally with the leg 163 and extending in the left-right direction is provided on the base 161 so as to be rotatable with respect to the base 161. An elongated hole 171 having a length in the front-rear direction is formed on both left and right sides of the base 161.

  At the front end of the shelf 167, a hanging pipe 173 connecting the shelf 167 and the seat receiver 165 is provided. The suspension pipe 173 has a pair of left and right vertical columns 173a extending upward and leftward from each of the left and right sides of the shelf 167, and a horizontal column 173b extending in the left and right direction connecting the pair of vertical columns 173a. are doing.

  A pair of protrusions 174 extending downward at two places spaced apart in the left-right direction are provided below the seat receiver 165, and each of the protrusions 174 is provided with a through hole 175 penetrating in the left-right direction. Has been.

  When the horizontal pillar 173b is inserted into the through hole 175, the horizontal pillar 173b can rotate in the through hole 175. That is, the horizontal column 173b is rotatably held by the protrusion 174, and in this state, the seating portion 15 and the shelf 167 are rotatably connected around the horizontal column 173b. The protruding portion 174 is an example of a bearing portion in the present invention, and the horizontal pillar 173b is an example of a connecting shaft in the present invention.

  A pair of connecting pieces 176 extending downward at two places spaced apart in the left-right direction are provided below the shelf 167, and each of the connecting pieces 176 has an insertion portion 177 inserted into the elongated hole 171. Is formed.

  When the leg 163 swings between the first position shown in FIG. 13B and the second position shown in FIG. 13C, the chair 167 receives a load via the suspension pipe 173 and moves in the front-rear direction. Move to At that time, the insertion portion 177 slides and moves inside the elongated hole 171.

  The shape of the long hole 171 as viewed from the left and right side surfaces is a shape that matches the shape of the region where the through hole 175 moves due to the swing. Therefore, even if the leg portion 163 swings, the positional relationship between the through hole 175 and the insertion portion 177 does not change significantly, so that when the shelf 167 is moved back and forth, the shelf 167 is prevented from being greatly inclined. .

  That is, when the leg 163 is located at the first position, the inclination angle of the shelf 167 with respect to the reference when the leg 163 is located at the second position is determined by the angle of the leg 163. It becomes smaller than the swing angle when swinging from the first position to the second position.

[6-2. effect]
According to the sixth embodiment described in detail above, in addition to the effects (1a) and (1b) of the above-described first embodiment, and the same effects as (5a) of the fifth embodiment, the following: The effect is obtained.

  (6a) The chair 151 controls the movement of the shelf 167 accompanying the swing of the leg 163 by the slide mechanism having the insertion portion 177 and the elongated hole 171. Therefore, it is possible to prevent the shelf 167 from moving to an unexpected position.

  (6b) The shelf 167 is connected to the protrusion 174 provided on the seat 15 via the suspension pipe 173. As a result, the amount of movement of the shelf 167 when the leg 163 swings is greater than in the case where the shelf is connected to the leg. Accordingly, if the leg 163 moves to the second position, the shelf 167 moves largely forward, and therefore, even if the shelf 167 is formed large in the front-rear direction, the shelf 167 moves rearward of the chair 151 in the stored state. Of the shelf 167 can be reduced.

[7. Other Embodiments]
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment at all, and it goes without saying that various forms are possible as long as they belong to the technical scope of the present invention.

(7a) The chair of the present invention is not limited to the configuration shown in the above embodiment.
For example, the leg portion may extend upward at at least one of the swingable ranges from the first position to the second position. The term “upward” 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 be configured to support the seat 15 in cooperation with other elements. For example, a second leg portion rotatably connected to the base and the seating portion is provided in front of or behind the leg portion, and the base, the seating portion, the leg portion, and the second leg portion constitute a four-bar link. May be.

  Further, the rotation axis serving as the center of swing of the leg may be fixed to the base or may be held at a predetermined position on 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 a part of another element such as a leg.

  Further, the leg may be configured to be swingable beyond a range from the first position to the second position. In a range beyond the range from the first position to the second position, the configuration may be such that the angle of inclination of the shelf does not become smaller than the angle at which the legs swing.

  As described in each of the above embodiments, the connecting portion connecting the leg and the shelf includes a connecting shaft (for example, the insertion portion 47, the connecting shaft 141, and the horizontal column 173b) fixed to the shelf. The connection may be realized by a configuration different from the configuration in which the bearing unit provided in the unit rotatably holds. For example, a configuration may be adopted in which a bearing is provided on a shelf and a connecting shaft is provided on a main body.

  At least when the leg swings, the connecting portion moves the shelf along the leg in the same direction as the direction of movement of the leg when viewed from above, and the relative position between the shelf and the leg. What is necessary is just to connect so that a typical position can be changed. For example, the shelf may be configured to be suspended from the main body by a wire. Further, the connecting portion may be configured to be detachable by a user.

The connecting shaft 141 does not need to be parallel to the rotating shaft (for example, the rotating shaft 31, the rotating shaft 139, and the rotating shaft 169), and may be arranged to be inclined.
Further, in the above-described embodiment, an example has been described in which the use state is when the leg is in the first position and the storage state is when the leg is in the second position. It is not limited to the one corresponding to the state.

  (7b) In each of the above embodiments, the configuration in which the inclination angle β is approximately 0 ° is exemplified. 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 danger of falling off the luggage is small, and if it is 5 ° or less, the danger can be reduced more remarkably. On the other hand, for example, when the chair is in the housed state, that is, in the above-described embodiment, when the legs are located at the second position, the rear of the shelf may be configured to be inclined downward. With this configuration, it is possible to improve the ease of placing and taking out the luggage.

(7c) In the above embodiments, the shelf is not inclined in the left-right direction even if the leg swings, but the shelf may be inclined within a range not exceeding the swing angle α.
(7d) In the fifth and sixth embodiments, the legs are divided into two hands and extend upward, and the shelves are arranged between the legs, thereby suppressing the limitation of the arrangement of the shelves. The configuration in which the shelf is configured to be wide is illustrated. However, as in the chair 201 shown in FIG. 14, the leg portion 203 may be configured to extend from the base 131 to only one of the left and right sides. The leg 203 extends leftward from the base 131, and its tip extends upward to support the seat 15.

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

  (7e) A 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 of 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. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above-described embodiment may be added to or replaced by the configuration of another above-described embodiment. In addition, all aspects included in the technical idea specified only by the language described in the claims are embodiments of the present invention.

1, 1a, 1b, 1c: Chair, 3: Installation surface, 11: Base, 13: Leg, 15: Seating portion, 17: Shelf, 19: Bearing, 21: Link member, 31: Rotating shaft, 47 ... insertion part, 61 ... base, 63 ... shelf, 65 ... bearing, 81 ... base, 83 ... shelf, 85 ... leg, 91 ... first gear, 93 ... second gear, 95 ... third gear, DESCRIPTION OF SYMBOLS 101 ... base part, 103 ... shelf part, 105 ... bearing part, 113 ... roller, 121 ... chair, 131 ... base part, 133 ... leg part, 137 ... shelf part, 139 ... rotation axis, 141 ... connection axis, 143 ... link member , 151: Chair, 161: Base, 163: Leg, 165: Seat, 167: Shelf, 169: Rotating shaft, 173: Suspended pipe, 173a: Vertical column, 173b: Horizontal column, 174: Projection, 175 ... through-hole, 201 ... chair, 203 ... leg

Claims (7)

A chair,
Legs extending upward from a base disposed on the installation surface of the chair and swinging around at least a first position to a second position around a rotation axis provided on the base, A body portion having a seating portion provided on the leg portion and having a seating surface on which a user can sit,
A shelf portion provided below the seat portion, on which luggage can be placed;
When the leg portion swings, a connecting portion that connects the main body portion and the shelf portion so that the shelf portion moves with the leg portion,
The connecting portion connects the main body portion and the shelf portion such that a relative position between the shelf portion and the leg portion can be changed, and the connection portion is configured such that the leg portion is located at the first position. With reference to the shelf, the angle of inclination of the shelf relative to the reference when the leg is located at the second position is such that the leg swings from the first position to the second position. A chair that is smaller than the angle of rocking when. The chair according to claim 1, wherein
The chair, comprising: a connection shaft provided on one of the leg portion and the shelf; and a bearing portion provided on the other side different from the one and rotatably holding the connection shaft. . The chair according to claim 1 or claim 2,
Furthermore, when the leg swings from the first position to the second position, the angle of inclination of the shelf with respect to the reference when the leg is located at the second position is equal to the angle of the leg. A chair comprising: a movement control unit that controls movement of the shelf so as to be smaller than a swing angle when swinging from the first position to the second position. The chair according to claim 3,
The movement control section has one end rotatably connected to an installation section provided on the installation surface, and the other end rotatable at a position spaced from a connection position with the leg section on the shelf. A chair having a four-bar link formed by a link member to be connected, the leg, and the shelf. The chair according to claim 3,
The chair, wherein the movement control unit has a slide mechanism that controls the inclination of the shelf during the movement while guiding the movement of the shelf accompanying the swing of the leg. The chair according to claim 3, which quotes claim 2,
The movement control unit includes a rotation control unit that rotates the connection shaft so that the shelf rotates in a direction opposite to the direction of the swing with respect to the legs when the legs swing. Have, chair. The chair according to claim 2,
The shelf has one or more rollers that rotate about an axis parallel to the rotation axis and that contact the support that supports the shelf from below from above. The chair, wherein the roller rotates and moves on the upper surface of the support when the shelf moves with swinging.