JP2002034698A - Desk and chair structure for lecture room - Google Patents

Abstract

(57) [Summary] [Problem] To widen the space at the foot of a person passing between the desk top plates 6 arranged in front and rear so as not to trip. A desk top plate fixed on a pair of right and left columns fixed to a floor surface is disposed in parallel with a front and rear space as appropriate. The chair 2 disposed in the space between the front and rear desk top plates 6 and 6 has its legs 10 fixed to the floor surface 9, and the seat 15 of each chair 2 is At least to be able to move back and forth and is elastically urged rearward. Each of the columns 3, 3 is erected downward and rearward so as to be on the front side at a position near the tabletop plate 6 and to be on the rear side toward the floor surface 9 in a side view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk and chair structure for a lecture room in a university or the like.

[0002]

2. Description of the Related Art In a lecture room, a desk and a chair fixed on a support fixed to a floor surface are arranged in parallel in the lecture room with a suitable distance from front to back. In addition, many chairs arranged in the space between the front and rear desk top plates have their legs fixed to the floor surface. About three to five people (students) can take a lecture side by side on one desk top (long desk), and the spacing between the front and rear desk tops Because the distance between the front and back of the desk is close to the front edge of the back tabletop, it is difficult to enter the center of the desk. On the contrary, there is a problem that the chair on the center side does not easily come out to the end of the desk.

In order to solve this problem, for example, as shown in Japanese Patent No. 2927712, when a lower end of a chair arranged in a space between the front and rear desk top plates is fixed to a floor surface. A base end of the main leg to which the backrest is attached is pivotally attached to the floor so as to be able to rotate back and forth, and the main leg has a seat support for supporting a lower front portion of the seat; There is disclosed a pivotally connected restricting body that supports the rear portion of the lower surface of the main leg and that allows the seat to be folded substantially vertically when the main leg is rotated forward.

According to this structure, when the main leg is rotated backward, the seat is substantially horizontal and a person can be seated. On the other hand, when the main leg is rotated forward, the backrest and the seat are separated. Is close to the rear edge of the front desk while being folded almost vertically, so the space between this chair and the front edge of the rear desk is widened, making it easier for people to enter and exit. Was something.

[0005]

However, if the columns for supporting the table tops are vertically erected from the floor, the gap between the desk and the base (fixed portion) of the chair is narrowed. There has been a problem that the feet of the person entering and exiting are more likely to be caught on the support or the base of the chair, making the entry and exit operations difficult.

A first object of the present invention is to provide a structure of a desk and chair for a lecture room in which the above-mentioned problems are solved and a person can easily go in and out. A second object of the present invention is to provide a configuration that facilitates wiring on a desk top plate by using left and right columns of the desk to use a computer or the like.

[0007]

According to a first aspect of the present invention, there is provided a desk and chair structure for a lecture room according to the first aspect of the present invention, wherein the desk and chair are fixed on a pair of right and left columns fixed to a floor surface. The chairs are arranged in a parallel manner at appropriate distances between the front and rear, and are arranged in the space between the front and rear desk top plates, the legs of which are fixed to the floor surface, and each of the chairs has a seat. The body is capable of moving at least back and forth with respect to the legs, and is elastically biased in the rearward direction.
The device is characterized in that it is erected downward and backward so as to be on the front side at a portion close to the tabletop and to be on the rear side as it goes to the floor surface.

According to a second aspect of the present invention, in the structure of the desk and chair for the lecture room according to the first aspect, a side surface of the at least one of the columns is connected to an outlet on the desk top plate. A vertically long vertical wiring duct for guiding wiring to be connected is provided, and a cover portion is provided on the vertical wiring duct so as to be openable and closable.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described. 1 is a partially cutaway side view showing the arrangement of a desk 1 and a chair 2 for a lecture room, FIG. 2 is a partially cutaway plan view, FIG. 3 is an exploded perspective view of each part of the desk, and FIG. 6 is a side sectional view of a main part of the desk.

As shown in FIGS. 1 and 2, the desk 1 has a pair of right and left columns 3, a cross section for connecting between upper ends of the pair of columns 3 and 3 and upper portions of the pair of columns 3, 3. A horizontally long desk top plate 6 fixed to a plurality of brackets 5a protruding from a rectangular cylindrical cross beam 4 and a bracket 5b protruding from a column 3, respectively.
The base body 7 at the lower end of each of the columns 3 is
With bolts 8. Each of the struts 3 is disposed such that the upper end thereof is disposed near the front edge of the tabletop plate 6 in a side view, and is inclined downward and backward so as to be more rearward as it goes down. The distance L4 between the center of the leg 10 of the chair 2 and the center of the column 3 of the desk 1 is approximately 474 mm in the embodiment.
It is about. The plurality of tabletops 6 having a front-rear width dimension of about 450 mm are arranged in parallel at a predetermined interval L1 (450 mm) in the front-rear direction, and the legs 10 fixed to the floor 9 between the intervals. Three to five chairs 2 are arranged at regular intervals in the horizontal direction (see FIG. 2).

Referring to FIGS. 4 and 5, the configuration of each chair 2 will be described. A horizontal base 11 fixed to the lower end of the leg 10 by welding or the like is firmly fixed with anchor bolts 12. The cylindrical leg 10 is erected substantially vertically with respect to the floor 9, and a substantially rectangular seat block 13 is fixed to the upper end of the leg 10. On both left and right sides of the seat block 13, support pieces 13a, 13
a protruding right and left outwards, and a slider member 14 having a U-shaped cross section made of a material having a small friction coefficient
Is fitted. On the other hand, on both left and right sides of a seat receiver 16 fixed to the lower surface of the seat body 15, rail portions 16a, 16 having a U-shaped cross section in front and rear longitudinal directions for guiding the slider member 14.
a is formed, whereby the seat block 13
On the other hand, the seat receiver 16 and, consequently, the seat body 16 can be moved back and forth.

A backrest body 18 is fixed to the upper part of a substantially L-shaped backrest support pillar 17 having a base end fixed to the left and right sides of the seat receiver 16. Since tension coil springs 39, 39 are mounted on the left and right sides between the front end of the seat support 16 and the rear end of the seat block 13, the elasticity of the tension coil springs 39, 39 is resisted. Backrest body 18
Is pushed forward (in the direction of the rear edge 6b of the front tabletop 6), and the gap between the backrest body 18 and the front edge 6a of the rear tabletop 6 becomes L2 (approximately 30 mm in the embodiment). ) To L3 (approximately 200 mm in the embodiment). Note that the seat block 13 may be mounted on the leg 10 so as to rotate horizontally. With such a configuration, when the person sitting on the seat body 15 stands up, it is separated from the rear edge 6b of the tabletop 6 so that
It becomes easy to turn the body together with the seat body 15 to stand up.

Next, the structure of the desk 1 will be described with reference to FIGS. 1 to 3, 6 and 7. FIG. The pair of left and right columns 3, 3 of each desk 1 is a metal cylinder, and the lower end thereof is fixedly connected to the base body 7 by welding or the like. The base body 7 can be detachably covered with left and right halved foot covers 19a and 19b. In addition, the curtain plate 23 is attached via the bracket 24 between the front surfaces of the pair of right and left columns 3, 3 only for the desk 1 in the front row (FIG. 1, FIG.
(See FIG. 3).

A plurality of outlets 25 for connecting to a power supply line 28 for using a personal computer or the like and an information line 29 such as a communication line for using the Internet are provided at a position near the upper surface of each tabletop 6. Will be installed for each seat location. Therefore, the information box 26 to which the outlet 25 is attached is fixed on the tabletop 6 and the wiring holes 27 are formed so as to penetrate the tabletop 6 vertically. On the other hand, the cross beam 4 connecting the upper ends of the pair of right and left columns 3, 3 has
The horizontal wiring duct 20 having a U-shaped cross-section facing upward in the left and right longitudinal direction is screwed, while the locking portion at the upper end of the left and right longitudinal front cover 21 covering the front and lower surfaces of the horizontal wiring duct 20 is provided.
It is detachably engaged with a fixing bolt 22 protruding from the lower surface of the tabletop plate 6. The horizontal wiring duct 20 is connected to the wiring hole 2.
7 below.

As shown in FIGS. 7 and 8, a vertical wiring duct 30 made of an extruded material made of a synthetic resin such as polypropylene has a vertically long substrate 30a and a vertically long cover portion 30b having a substantially semicircular cross section. The substrate 30a is connected to a thin hinge portion 31 on one side edge of the substrate 30a, and the substrate 30a is attached to the inner surfaces of the pair of columns 3, 3 with screws 36. Also,
On the substrate 30a, vertically long partition pieces 32a and 32b curved in opposite directions are integrally formed. As shown in FIG. 8, by removing a locking piece 34 provided at a free end of the cover portion 30b with respect to a hook-shaped engaging portion 33 formed on an edge opposite to the hinge portion 31 on the substrate 30a. , The interior of the vertical wiring duct 30 is opened,
8 and the information line 29 can be wired along separate wiring paths separated by the partition pieces 32a and 32b.
These lines 28 and 29 can be inserted through holes 35 formed in the floor 9. Note that a shelf 37 that can store books and the like may be provided on the lower surface of the desk top plate 6.

[0016]

As described above, the structure of the desk and chair for the lecture room according to the first aspect of the present invention is such that a desk top plate fixed on a pair of left and right supports fixed to the floor surface can be appropriately moved back and forth. The chair is arranged in parallel with a gap, and is arranged in the space between the front and rear desk top plates, the legs of which are fixed to the floor surface,
The seat of each of the chairs is movable at least back and forth with respect to the legs, and is elastically urged rearward, and each of the struts is a front side at a portion close to a tabletop in a side view, and is a floor. Since it is erected downward and backward so that it becomes the rear side as it goes to the surface, the person sitting on the chair on the center side of the desk top that is long to the left and right can pass through the horizontally long gap passage between the front and back desk tops. When going outside (to the side of the tabletop) through the gap passage, or conversely, when passing through the gap passage to sit on the chair on the center side, the back-and-forth chair is pushed forward to widen the front-back distance of the gap passage. This makes it easy for people to pass through and allows quick entry and exit, and the lower part of the support arranged on the side end side of the desk top plate is located below the desk top plate in the front-rear direction. Because it will be located closer to you, the space under your feet that passes between the front and back desks Kudeki Te, an effect that the legs or feet of the person below said gap passage collides with the post, the risk of such stumble is eliminated.

Furthermore, the kneecap portion of the person sitting on the chair near the support posts faces forward below the tabletop, but when turning to the side of the tabletop on the seat body, It becomes difficult for the upper side of the column located near the front edge of the desk top plate to collide with the kneecap, which also has the effect of enabling the person to move in and out quickly and safely.

According to a second aspect of the present invention, in the structure of the desk and chair for the lecture room according to the first aspect, a side of the at least one support is provided with an outlet on the desk top plate. A vertically long vertical wiring duct for guiding wiring to be connected is provided, and a cover portion is provided on the vertical wiring duct so as to be openable and closable.

Therefore, the wiring connected to the outlet on the tabletop can be inserted under the floor via the horizontal wiring duct on the lower surface of the tabletop and the vertical wiring duct on the inner surface of the support, so that the person sitting on the chair is obstructed. It also eliminates the risk of accidents such as human feet entangled in wiring when passing between the front and rear desk tops sideways, and the effect of extremely easy wiring work by opening the cover of the vertical wiring duct. Play.

[Brief description of the drawings]

FIG. 1 is a side view showing an arrangement of a desk and a chair for a lecture room.

FIG. 2 is a partially cutaway plan view.

FIG. 3 is a perspective view of a desk component.

FIG. 4 is a partially cutaway side view of the chair.

FIG. 5 is a partially cutaway view from the back of the chair.

6 is an enlarged side sectional view taken along line VI-VI of FIG. 1;

7 is an enlarged side sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a cross-sectional view of a vertical wiring duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 desk 2 chair 3 support 6 table top 9 floor 10 leg 13 seat block 15 seat 16 seat seat 20 horizontal wiring duct 25 outlet 26 information box 28 power supply line 29 information line 30 vertical wiring duct 30a board 30b Cover

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naoyuki Maekawa 1-4-1 Imafukuhigashi, Joto-ku, Osaka-shi Inside Itoki Crebio Co., Ltd. (72) Inventor Takeshi Shiratori 1-6-1, Awajicho, Chuo-ku, Osaka-shi No. F-term (reference) in Itoki Corporation 3B069 HA06 HA10 3B099 FA01 FA24

Claims (2)

[Claims] 1. A chair arranged on a pair of left and right supports fixed to a floor surface and arranged in parallel at appropriate intervals in front and rear, and arranged in a space between the front and rear desk tops, The legs are fixed to the floor surface, and the seat of each of the chairs is movable at least back and forth with respect to the legs, and is elastically biased in the rearward direction, and each of the columns is A desk and chair structure for a lecture room, wherein the desk and chair for a lecture room are erected downward and rearward so as to be forward at a portion close to the desk top plate in a side view, and to be rearward toward the floor. 2. A side surface of the at least one support,
The vertical wiring duct for guiding the wiring connected to the outlet part on the desk top plate is provided, and a cover part is provided on the vertical wiring duct so as to be openable and closable. Desk and chair structure for the lecture room.