JP5090090B2 - Chair - Google Patents

Description

  The present invention relates to a chair that is inclined by a plurality of link members so that a rear portion of a seat is raised.

  In a conventional lecture room chair, a main link (first link member) is pivotably mounted between a fixed portion (support leg) fixed to the floor and a seat (seat). The backrest support portion having a backrest at the upper portion is pivotally attached to the fixed portion so as to be swingable, and an auxiliary link (second link member) swings between the seat and the backrest support portion. It is pivotally attached. In this chair, the main link and the backrest support portion are inclined forward by a coil spring provided in the fixed portion, and the rear portion is provided by a coil spring provided in the upper position of the main link. When not in use, the entire chair and the seat are rotated forward, and the seat is stored under the top plate of the desk. By pulling the backrest backward, the seat becomes substantially horizontal and can be seated (for example, see Patent Document 1).

Japanese Patent No. 2927712 (page 6, FIG. 3)

  However, in the lecture room chair described in Patent Document 1, since the seat (seat body) is always biased so as to tilt forward, the user sits on the front side of the seat with the weight applied. If it happens, the seat may inadvertently rotate and tilt about the pivot point with the main link (first link member).

  The present invention has been made paying attention to such problems, and in a chair that is tilted so that the rear part of the seat body is raised by a plurality of link members, the user puts weight on the front part side of the seat body. An object of the present invention is to provide a chair capable of preventing the seat body from inadvertently tilting even when the user sits down.

In order to solve the above-mentioned problem, the chair according to claim 1 of the present invention includes:
A support leg fixed to the floor is provided, and the first link member pivotally attached to the front part of the seat body is pivotally attached to the front part of the support leg part and pivotally attached to the rear part of the seat body. The second link member is pivotally attached to the rear part of the support leg, and the first link member and the second link member are swung so that the seat body is inclined so that the rear part is raised. In a chair that moves between a position and a substantially horizontal position to use,
In a use state in which the seat body is substantially horizontal, from a virtual line connecting the pivot point of the seat body and the first link member and the pivot point of the support leg and the second link member Is also characterized in that the pivot point between the seat body and the second link member is in the lower position.
According to this feature, when the seat body is substantially horizontal, the pivot point of the seat body and the second link member is located below the imaginary line, so the seat body is tilted forward. Therefore, even if the user sits with his / her weight on the front side of the seat, the seat can be prevented from inadvertently tilting.

The chair according to claim 2 of the present invention is the chair according to claim 1,
A pivot point between the seat body and the first link member is movable in a direction away from the pivot point between the support leg and the first link member.
According to this feature, when the pivot point between the seat body and the second link member exceeds the imaginary line, the pivot point between the seat body and the first link member becomes the support leg portion and the first link member. After moving beyond the imaginary line, the first and second links can be moved when switching the tilt position and the horizontal position of the seat. A series of member movements can be performed smoothly.

The chair according to claim 3 of the present invention is the chair according to claim 1 or 2,
The pivot point between the support leg and the second link member is located above the pivot point between the support leg and the first link member.
According to this feature, when the user is seated, the first and second link members can be easily swung in the direction in which the seat body becomes substantially horizontal by utilizing the weight of the seat body.

The chair according to claim 4 of the present invention is the chair according to any one of claims 1 to 3,
The housing space formed in the support leg portion houses a biasing means for biasing the second link member rearward and upward.
According to this feature, the second link member can be urged rearward and upward to raise the rear portion of the seat body, and the seat body can be reliably tilted.

The chair according to claim 5 of the present invention is the chair according to any one of claims 1 to 4,
The first link member supports at least two left and right portions in the front portion of the seat body.
According to this feature, the left and right wide ranges of the front part of the seat body are stably supported by the first link member, and the user can sit on the front part side of the seat with weight.

A chair according to claim 6 of the present invention is the chair according to any one of claims 1 to 5,
The support leg portion includes a fixing portion fixed to the floor, and a swinging portion pivotally attached to the fixing portion so as to swing back and forth in a state of being elastically biased forward. The seat is housed under the top plate of the desk fixed to the floor by swinging the moving part forward.
According to this feature, when the chair is not used, the swinging portion of the support leg swings forward, so that the seat body is stored below the top plate of the desk, and the chair does not get in the way. Can be done.

  The best mode for carrying out the chair according to the present invention will be described below based on examples.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a side view showing a desk and a chair in this embodiment, FIG. 2 is a perspective view showing an overall image of the chair, and FIG. Fig. 4 is a plan view showing the internal structure of the chair, Fig. 4 is a vertical side view showing a storage state in which the chair is stored, and Fig. 5 is a vertical side view showing an inclined state in which the seat of the chair is inclined. FIG. 6 is a longitudinal side view showing a swinging state in which the seat body of the chair is swung, and FIG. 7 is a longitudinal side view showing a use state in which the chair is used. Hereinafter, the left side of FIG. 1, FIG. 3 to FIG. 7 will be described as the front side (front side) of the chair.

  Reference numeral 1 in FIG. 1 is a chair 1 to which the present invention is applied, which is installed in a lecture room of a university or a company. In this embodiment, a plurality of desks 2 are fixed to the floor at predetermined intervals in the front-rear direction, and a plurality of chairs 1 are provided on the back side of each desk 2 in a state of being fixed to the floor. . Although not specifically shown, these desks 2 are lecture room desks 2 that are formed in a laterally long horizontal direction. A plurality of chairs 1 are provided at predetermined intervals in the left-right direction along the desk 2.

  As shown in FIG. 2, the chair 1 of this embodiment has a base 4 fixed to the floor surface, and a leg support 5 is pivotally attached to the base 4 so as to be swingable in the front-rear direction. Yes. Further, a support body 6 is provided at the upper end portion of the leg support 5, and a backrest 7 extending upward is attached to the rear portion of the support body 6. Above the support 6, a seat plate 8 of the chair 1 is arranged.

  In this embodiment, the base 4, the leg support 5, and the support 6 constitute the support leg portion in this embodiment. Furthermore, the base 4 constitutes a fixed portion in the present embodiment, and the leg support 5 and the support 6 constitute a swing portion in the present embodiment.

  As shown in FIG. 1, the seat plate 8 of the chair 1 is inclined so that the upper surface of the seat plate 8 faces the front side when the rear portion thereof is raised. Specifically, as shown in the chair 1 on the left side of FIG. 1, when the chair 1 is not in use, the leg support 5 is swung forward and tilted forward, The rear portion is inclined so as to rise, and the seat plate 8 can be stored in the lower portion of the top plate 3 so that the chair 1 does not get in the way.

  In the storage state, the user U can pass through the space between the chair 1 and the desk 2 provided on the back side of the chair 1. Furthermore, the state in which the seat plate 8 of the chair 1 in the stored state is inclined with respect to the support 6 is the inclined position in the present embodiment.

  Moreover, as shown in the chair 1 in the center of the paper surface of FIG. 1, the user U can grasp the backrest 7 of the chair 1 and tilt it backward from the housed state. Even in this state, the seat plate 8 is inclined. In this state, the seat plate 8 is inclined at a gentle inclination angle so that the user U can easily sit down. Furthermore, the user U can step into the space between the chair 1 and the desk 2 provided on the front side of the chair 1.

  Further, as shown in the chair 1 on the right side of FIG. 1, when the user U sits on the seat plate 8 of the tilted chair 1, the seat plate 8 of the chair 1 is tilted (inclined by the weight of the user U). The position is pressed downward from the position) to be in a substantially horizontal parallel state (substantially horizontal position) which is the swing limit. This state is a use state (seatable state) in which the chair 1 is used.

  Next, the configuration of the chair 1 will be described in detail. As shown in FIG. 4, the lower end portion of the leg column 5 is pivotally attached to the base 4, and a coil spring 9 that urges the leg column 5 toward the front side (front side) is disposed inside the base 4. Yes. By doing so, the leg support 5 is elastically biased so as to be swingable to the front side by the biasing force of the coil spring 9, and when the chair 1 is not in use, the chair 1 can be automatically placed in the stowed state.

  Further, the support 6 provided at the upper end of the leg support 5 is formed in a substantially L shape in a side view, and an accommodation space 10 opened to the front side is formed. The support 6 is substantially a box. It has a body shape. Furthermore, the lower end of the 1st link member 15 is pivotally attached to the right-and-left both sides | surfaces of the front part side in the support body 6 by the pivot shaft 11 as a pivot point in a present Example.

  The first link member 15 can swing back and forth around the pivot shaft 11. Furthermore, the pivot shaft 11 is provided at a position ahead of the connection position of the leg support 5 in the support 6.

  As shown in FIGS. 3 and 4, the first link member 15 has two bar members 15 a pivotally attached to the left and right side surfaces of the support body 6, and between the bar members 15 a, A collar 15b for improving the strength of the first link member 15 is stretched integrally with the bar 15a.

  As shown in FIG. 4, the lower end of the second link member 16 is pivotally attached to the rear side of the support 6 by a pivot shaft 12 as a pivot point in the present embodiment. The position of the pivot shaft 12 that pivotally attaches the second link member 16 to the support 6 is higher than the pivot shaft 11 that pivots the first link member 15 to the support 6.

  In addition, the lower end part of the 2nd link member 16 is arrange | positioned in the accommodation space 10, and has the two bar materials 16a by which the edge part was pivotally attached to the support body 6, and between these both bar materials 16a. The extending shaft 16b is stretched integrally with the bar 16a, and the second link member 16 is formed in a substantially H shape in plan view.

  The upper end of the first link member 15 is pivotally attached to the front position of the bracket 17 provided on the lower surface of the seat plate 8, and the upper end of the second link member 16 is provided on the lower surface of the seat plate 8. The bracket 17 is pivotally attached to the rear position. The seat plate 8 is screwed to the upper surface side of the bracket 17. In this embodiment, the seat plate 8 and the bracket 17 constitute a seat body in this embodiment. Furthermore, the swing range in the front-rear direction of the first link member 15 is smaller than the swing range in the front-rear direction of the second link member 16.

  Specifically, the first link member 15 is pivotally attached to the front portion of the bracket 17 on both right and left sides by a pivot shaft 13 as a pivot point in the present embodiment. The pivot shaft 13 is fixedly projected with respect to the first link member 15. A second link member 16 is pivotally attached to the rear portion of the bracket 17 by a pivot shaft 14 as a pivot point in the present embodiment. Each of the first link member 15 and the second link member 16 supports the front and rear positions of the bracket 17.

  By pivotally attaching the first link member 15 and the second link member 16 to the bracket 17 in this manner, when the chair 1 is not in use, the first link member 15 and the second link member 16 are swung, and the seat plate The bracket 17 can be tilted so that the rear part of 8 is raised.

  A long hole 18 extending in the longitudinal direction of the first link member 15 is formed at the upper end of the first link member 15. The pivot shaft 13 is attached to the bracket 17 through the long hole 18. Therefore, the pivot shaft 13 can be slid and moved within the range of the long hole 18 in the longitudinal direction.

  As shown in FIG. 3, a coil damper 19 as an urging means in the present embodiment, which is composed of a telescopic cylinder and a coil spring, is housed in the housing space 10. The coil damper 19 is arranged such that its longitudinal direction extends toward the back side in the accommodating space 10, and the lower end portion of the coil damper 19 is pivotally attached to the support 6 so as to be swingable back and forth. Yes. A linkage member 20 is attached to the upper end of the coil damper 19 so as to be swingable back and forth.

  The linkage member 20 is pivotally attached to the extending shaft 16 b of the second link member 16, and the coil damper 19 is engaged with the second link member 16 via the linkage member 20. The coil damper 19 extends in the longitudinal direction due to the biasing force of the coil spring, and the coil damper 19 swings the second link member 16 rearward and upward from the accommodation space 10 via the linkage member 20. Is energized.

  A standing piece 21 is provided at an upper position of the support 6. The standing piece 21 is disposed on the left and right sides of the upper end portion of the coil damper 19 in the accommodation space 10. The standing piece 21 is formed with a sliding groove 21a extending substantially in the vertical direction. Further, slide shafts 19 a are provided on the left and right of the upper end portion of the coil damper 19, and the slide shafts 19 a are slidably fitted into the slide grooves 21 a of the standing piece 21. The movable range of the coil damper 19 is regulated by the sliding groove 21a.

  Next, the operation of the chair 1 will be described in detail. First, as shown in FIG. 4, the chair 1 when not in use is inclined forward by the bias of the coil spring 9 provided in the base 4, and the seat plate 8 is attached to the coil damper 19 in the support 6. Due to the force, the rear portion of the seat plate 8 is raised and inclined to be in a stowed state (inclined position).

  When the chair 1 is used, the user U pulls the backrest 7 of the stored chair 1 to the back side, thereby swinging the leg support 5 to the back side and tilting the chair 1 as shown in FIG. State. At this time, the upper surface of the seat plate 8 is inclined to the front side at a predetermined inclination angle θ. More specifically, the upper surface of the seat plate 8 is inclined forward with respect to the horizontal line H at a predetermined inclination angle θ. In this embodiment, the inclination angle θ is approximately 25 degrees. Furthermore, the inclination angle θ of the seat plate 8 is preferably within a range of at least about 10 degrees and about 45 degrees.

  Further, when the chair 1 is inclined, the user U steps into the space between the desk 2 and the chair 1. At this time, since the chair 1 is inclined to the back side and the seat plate 8 is inclined to the front side, the seat U is not obstructed, and the user U can extend the desk 2 and the chair with the legs extended. You can step into the space.

  Then, when the user U sits on the seat plate 8, the seat plate 8 is pressed from above, and as shown in FIG. 6, the first link member 15 and the second link member 16 swing to the front side (front side). The seat plate 8 approaches the substantially horizontal state. At this time, the coil damper 19 housed in the housing space 10 is contracted by the second link member 16 being swung to the front side.

  Further, in a swinging state while the seat plate 8 changes from the inclined position to the horizontal position, the pivot shaft 13 on which the first link member 15 is pivotally mounted on the bracket 17 and the second link member 16 pivot on the support body 6. The pivot shaft 14 on which the second link member 16 is pivotally mounted on the bracket 17 is located above the virtual line V connecting the pivot shaft 12 to be worn.

  The first link member 15, the second link member 16, the bracket 17, and the support body 6 form a non-parallel four-bar link having corners of the pivot shafts 11, 12, 13, and 14. A state in which the pivot shaft 14 on which the second link member 16 is pivotally mounted on the bracket 17 is arranged on the line V is a dead center of the non-parallel four-bar link.

  Then, the swing of the first link member 15 to the front side stops, the second link member 16 swings to the front side, and the pivot shaft 14 is lowered so that the seat plate 8 is substantially horizontal. At this time, the pivot shaft 13 is temporarily moved from the lower end side of the long hole 18 to the upper end side, and the pivot shaft 13 returns from the upper end side of the long hole 18 to the lower end side again.

  That is, the pivot shaft 13 between the bracket 17 and the first link member 15 is temporarily movable in a direction away from the pivot shaft 11 between the support 6 and the first link member 15. Therefore, the second link member 16 and the bracket 17 do not stick to each other and the pivot shaft 14 is smoothly moved to a position below the virtual line V, and the seat plate 8 is switched from the inclined position to the horizontal position. Is in the use state shown in FIG. Since the seat plate 8 is loaded in use, the pivot shaft 13 is maintained in engagement with the lower end of the long hole 18, and the pivot shaft 14 is moved from the lower position to the upper position with respect to the virtual line V. The coil damper 19 cannot give the second link member 16 a force sufficient to switch to the first link member 16, and the swinging of the seat plate 8 to the front is restricted.

  When the chair 1 is changed from the use state shown in FIG. 7 to the housed state shown in FIG. 4, the seat plate 8 is moved by the urging force of the coil damper 19 because the buttocks of the user U are separated from the upper surface of the seat plate 8. Switch from horizontal position to tilt position. Then, the leg support 5 is swung to the front side by the urging force of the coil spring 9 disposed in the base 4, and the seat plate 8 is in a storage state where the seat plate 8 is positioned below the top plate 3. At this time, by appropriately setting the urging force of the coil damper 19, it may be adjusted so that the seat plate 8 does not immediately switch to the inclined position, or after the leg support 5 is swung to the front side. The seat plate 8 may be adjusted to be switched to the inclined position.

  As described above, in the chair 1 of the present embodiment, the support 6 to which the backrest 7 is fixed is provided on the upper portion of the leg support 5, and the first link pivotally attached to the front portion of the seat plate 8 (bracket 17). The member 15 is pivotally attached to the front part of the support body 6, and the second link member 16 pivotally attached to the rear part of the seat plate 8 is pivotally attached to the rear part of the support body 6, so that the first link member 15 and the second link are connected. By swinging the member 16, the seat plate 8 moves between the inclined position and the substantially horizontal position to be used.

  By doing in this way, since the 1st and 2nd link members 15 and 16 are arranged above the leg support 5, the 1st and 2nd link members 15 and 16 do not get in the way, and chair 1 The space between the desk 2 and the desk 2 can be widened to make it easy for the user U to step on, and between the support 6 above the leg column 5 and the seat plate 8 (bracket 17), the first and first Since the two link members 15 and 16 can be provided, the lengths of the two link members 15 and 16 can be shortened, the inclination angle of the seat plate 8 is restricted, and the user U can use the ceiling of the desk 2. When the backrest 7 of the chair 1 stored in the lower side of the board 3 is pulled, the seat board 8 has an inclination angle that is substantially horizontal, and when the user U sits down, It is possible to easily place the collar on the upper surface of the seat plate 8.

  Further, since the pivot shaft 12 between the support 6 and the second link member 16 is positioned above the pivot shaft 11 between the support 6 and the first link member 15, the user U is seated. In doing so, the first and second link members 15 and 16 can be easily swung in the direction in which the seat plate 8 becomes substantially horizontal by utilizing the weight of the seat plate 8 (bracket 17).

  Further, since the accommodating space 10 formed in the support body 6 accommodates the coil damper 19 that urges the pivot shaft 14 of the second link member 16 rearward and upward, the second link member 16 is attached rearwardly and upwardly. The seat plate 8 (bracket 17) can be lifted and the seat plate 8 can be reliably tilted, and a wide space is formed between the chair 1 and the desk 2 where the user U puts his / her foot. can do.

  In addition, since the first link member 15 supports two left and right portions in the front portion of the seat plate 8 (bracket 17), the left and right wide ranges of the front portion of the seat plate 8 are more stable than the first link member 15. Thus, the user U can sit on the front side of the seat plate 8 with his weight.

  In a use state where the seat plate 8 (bracket 17) is substantially horizontal, the pivot shaft 13 between the seat plate 8 and the first link member 15 and the pivot shaft 12 between the support 6 and the second link member 16. The pivoting shaft 14 between the seat body 8 and the second link member 16 is in a lower position than the phantom line V that connects the seat plate 8 to the user U. However, even when the person sits on the front side of the seat plate 8 with a weight, the seat plate 8 can be prevented from inadvertently tilting.

  Further, the pivot shaft 13 between the seat plate 8 (bracket 17) and the first link member 15 is movable in a direction away from the pivot shaft 11 between the support 6 and the first link member 15. When the pivot shaft 14 between the seat plate 8 and the second link member 16 exceeds the imaginary line V, the pivot shaft 13 between the seat plate 8 and the first link member 15 serves as the support 6 and the first link. After moving in the direction away from the pivot shaft 11 with respect to the member 15 and exceeding the imaginary line V, a movement to return to the original position can be performed, and the first position is changed when the tilt position and the horizontal position of the seat plate 8 are switched. In addition, a series of movements of the second link members 15 and 16 can be performed smoothly.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the coil damper 19 as the biasing means is accommodated in the housing space 10 and the rear portion of the seat plate 8 as the seat body is biased rearward and upward. However, the coil damper 19 is not necessarily required. Alternatively, without providing the coil damper 19, the user U may manually place the chair 1 after tilting the seat plate 8.

  In the above embodiment, the coil damper 19 as the biasing means is housed in the housing space 10. However, an oil damper or an air damper may be used, and a second spring may be used as the biasing means. The link member 16 may be biased so as to swing rearward and upward.

  Moreover, in the said Example, although the pivot axis 11 to which the lower end of the 1st link member 15 was pivoted was provided in the front position rather than the connection position with the leg support | pillar 5 in the support body 6, it is pivoted. The position where the shaft 11 is provided may be a position behind the connecting position of the leg support 5 in the support 6.

  Moreover, in the said Example, although the support body 6 made the substantially box shape in which the accommodation space 10 was formed, the substantially plate-shaped support body in which the accommodation space 10 is not formed may be sufficient.

  Moreover, although the said Example demonstrated as the chair 1 installed in the lecture room of a university or a company, the place other than lecture rooms, such as a restaurant, may be installed.

It is a side view which shows the desk and chair in a present Example. It is a perspective view which shows the whole image of a chair. It is a top view which shows the internal structure of a chair. It is a vertical side view which shows the accommodation state in which the chair was accommodated. It is a vertical side view which shows the inclination state in which the seat body of the chair was inclined. It is a vertical side view which shows the rocking | fluctuation state by which the seat body of the chair was rocked. It is a vertical side view which shows the use condition in which a chair is used.

Explanation of symbols

1 Chair 2 Desk 3 Top plate 4 Base (support leg, fixed part)
5 Leg support (support leg, swing part)
6 Support body (support leg, swing part)
7 Backrest 8 Seat plate (sitting body)
10 Containment space 11, 12 Pivoting axis (Pivoting point)
13,14 Pivot axis (Pivot point)
15 First link member 16 Second link member 17 Bracket (seat)
19 Coil damper (biasing means)

Claims (6)

A support leg fixed to the floor is provided, and the first link member pivotally attached to the front part of the seat body is pivotally attached to the front part of the support leg part and pivotally attached to the rear part of the seat body. The second link member is pivotally attached to the rear part of the support leg, and the first link member and the second link member are swung so that the seat body is inclined so that the rear part is raised. In a chair that moves between a position and a substantially horizontal position to use,
In a use state in which the seat body is substantially horizontal, from a virtual line connecting the pivot point of the seat body and the first link member and the pivot point of the support leg and the second link member The chair characterized by that the pivot point of the said seat and said 2nd link member becomes a downward position.   The pivot point between the seat body and the first link member is movable in a direction away from the pivot point between the support leg and the first link member. The listed chair.   The pivot point between the support leg and the second link member is located above the pivot point between the support leg and the first link member. The chair described in.   The chair according to any one of claims 1 to 3, wherein an energizing means for energizing the second link member rearward and upward is accommodated in the accommodating space formed in the support leg portion.   The chair according to any one of claims 1 to 4, wherein the first link member supports at least two left and right portions of the front portion of the seat body.   The support leg portion includes a fixing portion fixed to the floor, and a swinging portion pivotally attached to the fixing portion so as to swing back and forth in a state of being elastically biased forward. The chair according to any one of claims 1 to 5, wherein the seat is housed below a top plate of a desk fixed to the floor by swinging the moving part forward.

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