JP5903243B2 - Desk system - Google Patents

Description

  The present invention relates to a desk system.

  Conventionally, desks and chairs used in classrooms and conference rooms at universities, etc. are widely equipped with a desk fixed to the floor and a chair fixed to the floor behind the desk. It is used.

Examples of the chair having the above structure include a leg standing from the floor, a seat that supports the leg by a link mechanism, and is inclined upward on the backrest side when not sitting, Some have a backrest that is pivotably provided at the end (see Patent Document 1).
In such a chair, when the user sits down on the seat, the link mechanism causes the front side of the seat to rise and the rear side to fall so that the seat is in a substantially horizontal state, and the backrest rotates and tilts backward. Can sit down.

Also, a base fixed on the floor, a leg standing so as to be pivotable from the base, a seat and a backrest inclined forward while being supported by the leg and not seated There is also known a chair (see Patent Document 2 below).
In such a chair, when the user sits on the seat, the leg portion is rotated backward, and the seat and the backrest are tilted backward until the seat is in a substantially horizontal state, so that the user can be seated.

  The chairs described in Patent Documents 1 and 2 are configured such that the backrest tilts backward in the seated state, so that a large space behind the backrest can be secured when the seat is not seated. Therefore, even when a desk is provided behind the chair, there is an advantage that a passage width behind the chair can be secured.

JP 2010-273768 A Japanese Patent No. 3751802

  However, in the configurations of the chairs described in Patent Documents 1 and 2, the seat rotates when the user sits down, and the front part of the seat where the user's knees are located moves greatly. It was difficult to recognize the sense of distance of the chair, and there was a problem that it was impossible to sit down with confidence.

  The present invention has been made in view of the above circumstances, and ensures a passage behind the chair and greatly changes the position of the front portion of the seat from the non-sitting state to the sitting state. This is to provide a desk system that can be seated stably.

In order to achieve the above object, the present invention employs the following means.
That is, the desk system according to the present invention includes a desk that is spaced apart from a stationary object fixed to the floor, and is fixed to the floor between the desk and the stationary object, and between the stationary object and the stationary object. In a desk system including a chair that can secure a user's passage, the chair rotates around a first axis along the floor to the support portion fixed to the floor and to the support portion at the front portion. The seat is provided with a seat surface that can support the seated user from below and the rear end of the seat on the side opposite to the front, and supports the seated user from the rear. A back plate having a possible back surface, and a support shaft that is rotatably supported by the back plate and has a limited range of movement , and the seat portion extends from the front portion to the rear end. It is located at the standby position that is inclined so as to go upward as it goes to the section. Thus, it is possible to rotate about the first axis from the standby position to a seating position where the user can be supported by rotating downward, and the back plate portion and the seat portion are in the standby position. In a state where it is located, it is located at a retracted position in which the passage is secured between the stationary object and a support position where the user can sit and rotate backward from the retracted position to support the user. The back plate portion is configured so as not to tilt backward from the support position by limiting the movement range of the support shaft . It is characterized by that.

In such a desk system, a user's channel | path can be ensured between a chair and a stationary object because a backplate part is located in a retracted position.
In addition, from the state where such a back plate portion is located at the retracted position and the seat portion is located at the standby position to the state where the user is seated and the seat portion is located at the seating position, the seat portion Since the front part of this only rotates around the first axis, its position does not change greatly. Therefore, the user can be seated stably.

  In the desk system according to the present invention, the back plate portion is supported by the rear end portion of the seat portion so as to be rotatable about a second axis along the floor, and is rotated about the second axis. By doing so, it may be turned to the support position.

  In this configuration, the back plate portion rotates about the second axis and rotates backward to the support position, so that the user can be stably supported and seated in a tilted posture.

  Furthermore, in the desk system according to the present invention, it is preferable that the support portion supports the seat portion so as to be rotatable about a vertical axis.

  According to this configuration, if the seat portion is rotated about the vertical axis, the chair can be seated from the lateral direction or from the rear, so that the usability can be improved.

  In the desk system according to the present invention, it is preferable that the support portion includes an urging portion that urges the back plate portion to a front position facing the desk side.

  According to this configuration, the back plate portion is urged to the front position by the urging portion, and the user can face the front position when sitting, so that the seat can be stably seated and the usability is good. Can do.

  Further, in the desk system according to the present invention, the back plate portion is in the retracted position, and the back surface is parallel to a vertical plane perpendicular to the front-rear direction in which the desk and the chair are arranged, or more than the vertical plane. It is characterized by tilting backward.

  According to this configuration, since the back surface of the back plate portion is parallel to the vertical surface or inclined rearward from the vertical surface, it can be supported in an easy posture for the user. Therefore, user convenience can be improved.

  In the desk system according to the present invention, a plurality of sets of the desk and the chair are continuously provided in the front-rear direction in which the desk and the chair are arranged, and the chair disposed in front of the desk includes the desk A desk is used as the stationary object, and the passage can be secured between the desk and the desk.

  According to this structure, a user's channel | path can be ensured reliably between a desk and the chair arrange | positioned ahead.

  According to the desk system of the present invention, a passage is secured behind the chair, and the position of the front portion of the seat is stably changed without significantly changing from the non-sitting state to the sitting state. It can be seated.

1 is a schematic overall view of a desk system according to an embodiment of the present invention. It is a side view of a chair in case the seat part of the chair which comprises the desk system which concerns on one Embodiment of this invention is located in a standby position. (A) When the seat part of the chair which comprises the desk system which concerns on one Embodiment of this invention is located in a standby position, (b) When the seat part is located in a seating position, (c) Back board It is a side view of a desk system in case a part is located in a support position. It is a side view of a chair in case the seat part of the chair which comprises the desk system which concerns on one Embodiment of this invention is located in a seating position. It is a side view of a chair in case the back board part of the chair which comprises the desk system which concerns on one Embodiment of this invention is located in a support position. It is sectional drawing of the principal part in case the back board part of the chair which comprises the desk system which concerns on one Embodiment of this invention exists in a retracted position. It is a perspective view of the important section of the chair which constitutes the desk system concerning one embodiment of the present invention. It is sectional drawing of the principal part in case the backplate part of the chair which comprises the desk system which concerns on one Embodiment of this invention exists in a support position. It is a figure explaining the structure which the chair which comprises the desk system which concerns on one Embodiment of this invention rotates. 1 is a plan view of a desk system according to an embodiment of the present invention.

Hereinafter, a desk system according to an embodiment of the present invention will be described.
As shown in FIG. 1, the desk system 1 is fixed to the floor F, a plurality of desks 11 that are spaced apart from each other by a predetermined interval, and the desks 1 that are arranged behind the respective desks 11 and are fixed to the floor F. A chair 2 is provided, and a user can sit on the chair 2 to perform work. Here, between the chair 2 and the desk 11 (fixed matter) arranged behind the chair 2, a passage P that allows the user to pass is secured.
The side where the user sits on the chair 2 and faces the front (the right hand side shown in FIG. 1) is the front, the opposite side (the left back side shown in FIG. 1) is the rear, and the chair 2 is adjacently arranged. The direction (the direction from the right back to the left front shown in FIG. 1) is defined as the left-right direction.

The desk 11 includes a pair of legs 12 spaced apart in the left-right direction, a top plate 13 placed on top of the legs 12, and a front panel 14 arranged on the front of the legs 12. It has.
The leg portion 12 includes a base 15 disposed along the floor F, and support legs 16 that stand from the base 15 and support the top plate 13.
The top plate 13 is formed to be wide in the left-right direction, which is substantially rectangular in plan view.
The front plate panel is arranged over the front portions of the pair of leg portions 12.

As shown in FIG. 2, the chair 2 includes a support portion 21 fixed to the floor F, a seat portion 22 whose front portion is supported by the support portion 21 via a support structure 40, and a rear end of the seat portion 22. A back plate portion 23 erected from the portion, and an auto return mechanism 50 disposed inside the support portion 21.
Here, the chair 2 is configured so that the user shown in FIG. 3B is seated from the first state where the user shown in FIG. The second state in which the user is seated on the part 22 and the third state in which the user shown in FIG. 3 (c) is seated on the seat part 22 and the back plate part 23 is tilted backward can be deformed.

As shown in FIG. 2, the support portion 21 is fixed to the floor F and has a substantially circular base portion 26 in plan view, a standing portion 27 erected from the base portion 26, and the standing portion 27. And a pair of support main bodies 28 that are widened forward in plan view.
The pair of support main bodies 28 is provided at the upper end of the standing portion 27, extends upward as it goes forward, and the tip thereof is attached to the back surface of the seat portion 22.

The seat portion 22 has a seat surface 22A that can support a seated user from below, is provided at the front portion of the support body 28, and has a first shaft 31 with the left-right direction as the axial direction along the floor F. It is supported so that it can rotate around.
That is, the seat portion 22 rotates around the first shaft 31 shown in FIG. 4 from the standby position inclined so as to go upward as it goes from the front portion to the rear end portion shown in FIG. Move to a seating position that can support the user. In the present embodiment, the seating surface 22A is substantially horizontal at the seating position.

As shown in FIG. 2, the back plate portion 23 has a back surface 23 </ b> A that can support a seated user from behind, is provided at the rear end portion of the seat portion 22, and extends in the left-right direction along the floor F. It is supported so as to be rotatable around the second shaft 32 in the axial direction.
That is, the back plate part 23 is inclined so as to go backward as it goes from the lower part to the upper part shown in FIG. 3) From the position of the retracted position, it rotates around the second shaft 32 shown in FIGS. 3C and 5 and further tilts backward to move to a support position that can support the user.
Further, the back surface 23A is inclined rearward from the vertical plane orthogonal to the front-rear direction at the retracted position.

  As shown in FIG. 6, the support structure 40 includes an urging means 41 that urges the seat portion 22 upward, a link mechanism 71 that rotatably supports the back plate portion 23, and the seat portion 22 from the standby position. Is also provided with a seat restricting means 91 for restricting the downward movement.

  The urging means 41 includes a gas spring 42 that connects the support body 28 and the seat portion 22, and a pair of left and right leaf spring members 43.

One end of the gas spring 42 is connected to the support body 28 via a third shaft 33 whose axial direction is the left-right direction, and the other end of the gas spring 42 is a fourth shaft 34 whose axial direction is the left-right direction. Connected to the back. Further, the gas spring 42 is biased in the extending direction, whereby the seat portion 22 is biased so as to be always located at the retracted position in a state where the user is not seated.
In addition to the gas spring 42, a compression coil spring, an oil damper, an air damper, or the like can be appropriately employed.

  As shown in FIG. 7, the leaf spring member 43 is a U-shaped member that is formed so as to open toward the front when viewed from the side and is curved at the rear. The leaf spring member 43 is connected to the support body 28 (see FIG. 6; the same applies hereinafter) via the upper shaft 46 fixed to the back surface of the seat 22 (see FIG. 6; the same applies hereinafter) and the third shaft 33. ) And a curved portion 48 that connects the upper spring portion 46 and the lower spring portion 47 to each other.

The link mechanism 71 includes a case member 72 connected to the support body 28 via the third shaft 33, and a fifth shaft 35 and a sixth shaft ( described later) having the left-right direction provided in the case member 72 as the axial direction. And a pair of compression spring members 81 disposed on the case member 72 via a support shaft 36.

The case member 72 is a box-shaped member that is open on the upper side, and includes a bottom portion 73 and a pair of side wall portions 74 and a rear wall portion 75 erected from the bottom portion 73. Is arranged. Further, the rear upper surface of the case member 72 is close to or in contact with the rear surface of the seat portion 22.
An insertion hole 76 is formed in the front portion of the side wall portion 74, and the third shaft 33 is inserted through the insertion hole 76, and the gas spring 42 connected to the third shaft 33 is connected to the pair of side wall portions 74. Inserted in between.

The compression spring member 81 is arranged inside the case member 72, and is provided with a spring holding plate 82 arranged from the front to the rear, a first coil spring 83 wound around the outer periphery of the spring holding plate 82, A fifth shaft 35 provided at the front portion of the spring holding plate 82 and a sixth shaft 36 provided at the rear portion of the spring holding plate 82 are provided.
A fifth shaft insertion hole 84 is formed in the front portion of the spring holding plate 82, and the fifth shaft 35 is inserted through the fifth shaft insertion hole 84. Further, a sixth shaft insertion hole 85 is formed in the rear portion of the spring holding plate 82, and the sixth shaft 36 is inserted through the sixth shaft insertion hole 85.
The first coil spring 83 is provided so as to be extendable and urged in the extending direction.
The fifth shaft 35 is provided such that both ends thereof are movable in a predetermined range along the side wall portion 74 of the case member 72 from the front and the bottom to the rear and the top with the left and right direction as the axial direction. When the seat portion 22 is located at the standby position, the fifth shaft 35 is located forward and downward.
The sixth shaft 36 is provided on the side wall portion 74 of the case member 72 so as to be movable within a predetermined range from the front and the lower side to the rear and the upper side with the left and right direction as the axial direction. The lower part is rotatably supported. When the seat portion 22 is located at the standby position, the sixth shaft 36 is located rearward and upward.
Further, since the first coil spring 83 is biased in the extending direction, the back plate portion 23 is biased so as to be positioned at the retracted position in a state where the user is not seated.

As shown in FIG. 6, the seat restricting means 91 is formed on the first inclined portion 92 formed on the lower surface of the bottom portion on the front side of the case member 72 and on the surface of the support body 28 that faces the first inclined portion 92. And a second inclined portion 93 formed.
The first inclined portion 92 has a slope formed on the lower surface of the bottom portion 73 of the case member 72 so as to go upward from the front to the rear.
The second inclined portion 93 has a slope formed so as to go upward as it goes from the front to the rear in a portion facing the first inclined portion 92 in the support body 28.
The 1st inclination part 92 and the 2nd inclination part 93 are spaced apart and arrange | positioned in the state which the user is not sitting.

As shown in FIGS. 9A and 9B, the auto-return mechanism 50 is disposed on the standing portion 27 of the support portion 21, and has an annular body 51 provided on the upper portion thereof, and passes through the annular body 51. A main shaft 52 rotatable around a vertical axis Q, a fixed cam 53 provided on the outer periphery of the main shaft 52, a rotating cam 54 provided on the outer periphery of the main shaft 52 and below the fixed cam 53, and a main shaft And a second coil spring 55 (urging portion) wound around 52.
The annular body 51 is an annular member in plan view, and a protrusion 56 is formed in the lower part.
A groove 57 having a shape corresponding to the protrusion 56 is formed on the upper portion of the fixed cam 53, and the groove 57 is engaged with the protrusion 56. In addition, a first cam surface 61 is formed on the lower portion of the fixed cam 53. The first cam surface 61 is a spiral surface having a winding direction that is different every half circumference.
The rotary cam 54 is slidably provided in the axial direction of the main shaft 52, and a second cam surface 62 is formed on the upper portion thereof. The second cam surface 62 is formed of a spiral surface having a different winding direction for each circumference.
The second coil spring 55 urges the lower part of the rotating cam 54 upward.

Next, an operation in which the chair 2 moves from the first state to the third state will be described.
First, as shown in FIG. 2, in the first state, the seat portion 22 is located at the standby position, and the back plate portion 23 is located at the retracted position.
When the user sits on the seat portion 22 in this state, the leaf spring member 43 is separated from the upper spring portion 46 and the lower spring portion 47 by the gravity of the user acting on the seat portion 22 as shown in FIG. As a result, the rear side of the lower spring portion 47 is pushed up rearward and the curved portion 48 is elastically deformed so as to gradually move rearward along the back surface of the seat portion 22.
Further, the seat portion 22 rotates downward about the first axis 31 due to the gravity of the user, and moves to the second state where the seating position is reached.
Here, as the link mechanism 71 moves downward, the lower surface of the first inclined portion 92 abuts on the upper surface of the second inclined portion 93, and the case member 72 is restricted from moving downward from the corresponding contact position. (Not shown).
Further, since the link mechanism 71 only moves downward and no compressive force acts on the first coil spring 83, the back plate portion 23 is moved to the floor F as shown in FIG. 3B by the initial urging force of the first coil spring 83. The inclination angle with respect to is substantially the same as in the first state.

Next, when the user tilts backward from the second state shown in FIG. 4 to the back plate portion 23, as shown in FIG. 8, the sixth shaft 36 supported by the back plate portion 23 moves forward and downward. At the same time, the first coil spring 83 is compressed. In this way, the back plate portion 23 is in the third state shown in FIG. 8 that rotates about the second shaft 32 and tilts backward to the support position. Here, since the movement range of the sixth shaft 36 is limited, the back plate portion 23 does not tilt backward from the support position.
In the third state, the seat portion 22 is located at the seating position, and the back plate portion 23 is located at the support position.

  Further, when the user tilts forward from the back plate portion 23 from the third state, the user extends by the urging force of the first coil spring 83, and the back plate portion 23 rotates about the second shaft 32 and tilts forward. It becomes a state.

  Next, when the user stands up from the second state, the seat portion 22 rotates about the first shaft 31 by the biasing force of the gas spring 42 and the leaf spring member 43, and the first state shown in FIG. Become.

Next, the horizontal rotation of the chair 2 will be described.
When the user is not seated, the curved portion of the first cam surface 61 of the fixed cam 53 and the second cam surface 62 of the rotating cam 54 as shown in FIG. The curved surface portion is in pressure contact. At this time, the chair 2 is located at a front position where the back surface 23A of the back plate portion 23 indicated by a solid line in FIG. 7 is directed to the front desk 11 side.

  When the user applies a force in the direction in which the chair 2 is rotated in the horizontal direction from this state, the main shaft 52 of the support portion 21 is rotated around the vertical axis Q as shown in FIG. At the same time, the rotating cam 54 rotates. At this time, the second cam surface 62 receives a reaction force from the first cam surface 61, and the curved portion of the first cam surface 61 and the curved portion of the second cam surface 62 are separated, that is, the rotating cam 54 is moved downward. The second coil spring 55 is compressed by moving. Thereby, the chair 2 rotates to the left-right position which turned the back surface 23A to the left-right direction, as shown with the dashed-two dotted line of FIG.

  When the rotational force applied to the chair 2 by the user is released from this state, the rotating cam 54 rotates with the main shaft 52 by the urging force of the second coil spring 55, and the first cam surface 61 and the second cam surface 62. Return to the front position shown in FIG.

In the desk system 1 configured in this manner, in the first state where the user is not seated, as shown in FIG. 3A, the back plate portion 23 is in the retracted position, so A passage P can be secured between them.
When the user is seated, the seat portion 22 is in the second state positioned at the substantially horizontal seating position. When the user is tilted backward, the back plate portion 23 is rotated about the second shaft 32 and tilted backward. In the third state, the user is supported on the back by the back plate portion 23. Therefore, it is possible to sit on the back plate portion 23 with the center of gravity stably and perform work using the front desk 11.

Here, when moving from the first state to the second state, the back plate portion 23 only moves downward as the seat portion 22 rotates about the first shaft 31, so that the minimum position from the retracted position is reached. It can be seated within a limited range of motion.
Further, when moving from the first state to the second state, the front portion of the seat portion 22 only rotates around the first shaft 31, and the amount of movement at that position can be suppressed. Therefore, the user can be surely supported by the seating surface 22A simply by dropping the hip on the seating surface 22A after placing the lower limbs in front of the front portion of the seating portion 22 where the lower limb should be placed when sitting. Therefore, you can sit safely in a small space.
Furthermore, since the seat part 22 is inclined and provided so as to go upward as it goes from the front part to the rear end part in the first state, at an early stage of the operation of the user moving from the standing position to the sitting position. It can come into contact with the seating surface 22A, and after the contact, it simply descends as the seat 22 moves. Therefore, in this respect as well, it is possible to sit safely in a narrow space.

  Further, the back surface 23A is inclined rearward with respect to the vertical surface in the first state, and only moves downward in the second state, so the angle does not change. Accordingly, even in the second state, the user's back can be supported in a backward tilted posture, so that the user can have a comfortable posture and can be supported stably.

  If the user places the center of gravity on the back plate 23 from the second state, the back plate 23 rotates about the second shaft 32 and tilts backward to the support position. Therefore, since it can be supported in a posture that is easy for the user, the usability can be improved.

  Further, if the user stands up at a position in the left-right direction of the chair 2 and rotates the chair 2 in the horizontal direction, the user can be seated from the position. Therefore, for example, even when the space portion between the chair 2 and the front desk 11 is narrow, it can be accessed from the position in the left-right direction, which is highly convenient.

  Furthermore, since the chair 2 is positioned at the front position by the second coil spring 55 after sitting, the user can sit and work toward the desk 11 in front, and the usability can be improved.

  Further, the operation procedure shown in the above-described embodiment, or the shapes and combinations of the constituent members are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, the back surface 23A of the back plate portion 23 may be parallel to the vertical surface. In this state, the passage P between the chair 2 and the stationary object can be reliably ensured, and the back plate can support the user and be seated stably.

Further, when the user is seated on the seat portion 22, the seat portion 22 and the back plate portion 23 are integrally rotated around the first shaft 31, and then the back plate portion 23 is placed on the center of gravity by applying the center of gravity to the back plate portion 23. May be configured to rotate about the second shaft 32.
Further, the seat 22 and the back plate 23 are integrally rotated around the first shaft 31 from the operation of the user sitting on the seat 22 to the operation of applying a load to the back plate 23. There may be.
Even in these cases, the passage P can be secured between the chair 2 and the stationary object, and the seat can be stably seated without greatly changing the position of the front portion of the seat portion 22.

  The support structure 40 and the auto return mechanism 50 described above are examples, and other known structures and mechanisms may be employed as long as they operate in the same manner.

1 ... Desk system 2 ... Chair 11 ... Desk (stationary)
DESCRIPTION OF SYMBOLS 21 ... Support part 22 ... Seat part 22A ... Seat surface 23 ... Back board part 23A ... Back 31 ... 1st axis | shaft 32 ... 2nd axis | shaft (axis | shaft)
55 ... Second coil spring (biasing part)
F ... Floor P ... Passage Q ... Vertical axis

Claims (6)

A desk provided separately from a stationary object fixed on the floor, and a chair fixed to the floor between the desk and the stationary object, and allowing a user's passage to be secured between the stationary object and the stationary object In a desk system with
The chair
A support fixed to the floor;
A seat part provided with a seating surface which is supported by the support part so as to be rotatable about a first axis along the floor at the front part and which can support a seated user from below;
A back plate portion supported by a rear end portion on the opposite side of the front portion of the seat portion and having a back surface capable of supporting a seated user from the rear ;
A support shaft that is rotatably supported by the back plate and has a limited movement range ;
The seat portion is positioned at a standby position that is inclined upward toward the rear end portion from the front portion, and is rotated downward from the standby position when the user is seated. Can be rotated about the first axis to a seating position capable of supporting
The back plate portion is located at a retracted position in which the passage is secured between the back plate portion and the stationary object in a state where the seat portion is located at the standby position, and the user sits backward from the retracted position. up capable of supporting the support position the user is rotated, to be rotatable about an axis along the floor,
The desk system is configured such that the back plate portion is configured not to tilt backwards from the support position by limiting the movement range of the support shaft . The desk system according to claim 1,
The back plate portion is supported by the rear end portion of the seat portion so as to be rotatable about a second axis along the floor, and is rotated to the support position by rotating about the second axis. The desk system characterized by being said. The desk system according to claim 1 or 2,
The desk system, wherein the support part supports the seat part so as to be rotatable about a vertical axis. The desk system according to claim 3,
The desk system according to claim 1, wherein the support portion includes a biasing portion that biases the back plate portion toward a front position facing the desk side. The desk system according to any one of claims 1 to 3,
The back plate portion is characterized in that, at the retracted position, the back surface is parallel to a vertical surface perpendicular to the front-rear direction in which the desk and the chair are arranged, or inclined rearward from the vertical surface. Desk system. In the desk system according to any one of claims 1 to 4,
A plurality of sets of the desk and the chair are continuously provided in the front-rear direction in which the desk and the chair are arranged, and the chair disposed in front of the desk is configured with the desk as the stationary object and the desk. The desk system is provided so that the passage can be secured between the desks.

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