JP2009017925A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety chair which can prevent an accident which otherwise may occur with the backward movement of the sitting part in its use. <P>SOLUTION: A chair 3 installed behind each of desks 2 comprises a base 13 fixed on a floor surface 14, a vertical leg support 12 being rotatably pivoted by the base 13 longitudinally and a sitting plate 11 mounted on the leg support 12. The chair 3 is housed below the top board 5 with the forward rotation of the leg support 12, a waist support part 11a with its tip upward is formed at the rear end part of the sitting plate 11 and the tip part 11b is located below the top board 11 with the chair housed while approaching the front below the top board 5 of another desk 2 disposed behind the chair 3 in the use of the chair 3 with the leg support 12 turned backward. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a chair mainly used in a classroom, a lecture room or the like, and in particular, a chair that moves from a storage position for storing a chair below the desk to a use position behind the desk by turning a leg column when the chair is used. About.

  Conventionally, classroom chairs and desks placed in schools, etc. are arranged with a plurality of desks that support the top plate on legs fixed to the floor at appropriate intervals in the front-rear direction. Many chairs are located behind. These chairs are provided with a base fixed to the floor, a seating unit in which a back and a seat are integrally coupled, and a lower end part connected to the base so as to be movable in the front-rear direction and an upper end part on the seating part. A plurality of legs that are connected to be movable in the front-rear direction, and a movement restricting part that restricts the movement of the legs to a certain range. When the chair is not in use, the seat plate is moved forward from the use position and accommodated under the desk. (For example, refer to Patent Document 1).

Japanese Patent No. 3751802 (5th page, Fig. 9)

  However, in the chair described in Patent Document 1, when the chair is used, a seated person using a desk placed behind the chair tilts forward with the hand reaching out, and the top plate of the desk When sitting on the chair at the back of the desk in a resting position with a hand on the front side of the desk, if the seat is moved backward, the seat of the seat and the front side of the top plate There was a risk that an accident such as an injury would occur due to a finger caught.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a safe chair that can prevent an accident even if the seating portion moves backward when the chair is used.

In order to solve the above-mentioned problem, the chair according to claim 1 of the present invention includes:
A plurality of desks supporting the top board on the legs fixed to the floor are installed at appropriate intervals in the front-rear direction, and chairs installed behind each of the desks are fixed to the floor. A leg strut that is pivotally supported so as to be pivotable in the front-rear direction with respect to the base, and a seat plate attached to the leg strut, and by rotating the leg strut forward In the chair accommodated below the top plate,
A waist support portion is formed at the rear end portion of the seat plate, and the front end portion is below the top plate in the housed state, and the leg support is rotated rearward. In a state in which the chair is used by moving, it is characterized in that it is closer to the lower front surface than the top plate of the desk disposed behind the chair.
According to this feature, when the seat plate is rotated backward via the leg support in order for the user to sit down, the tip of the waist support portion of the chair and the leg of the desk disposed behind the chair Since the leg struts are rotated backward with a space between the top plate support portion and the chair can be seated, an accident that pinches fingers of the seated person behind is prevented. be able to. Moreover, in the state using a chair, since a waist | hip support part is arrange | positioned so that it may approach a lower front surface rather than the top plate of a back desk, desks can be installed in a small space | interval.

The chair according to claim 2 of the present invention is the chair according to claim 1,
An inclined portion to which the seat plate is inclined forward is formed at the upper end portion of the leg support.
According to this feature, since the seat plate is tilted forward so as to be lowered forward and attached to the leg column, the chair can be arranged in the accommodated state without having to rotate the leg column greatly. For this reason, a base can be arrange | positioned in the position close | similar to a desk more, and it becomes possible to shorten the space | interval of the front-back direction between desks. Thereby, a desk and a chair can be effectively arranged in a predetermined space such as a lecture room. In addition, since the base can be arranged at a position closer to the desk, a sufficient space can be secured between the chair and the desk arranged behind the chair, so that a passerby can easily rear the chair. You can pass through.

The chair according to claim 3 of the present invention is the chair according to claim 1 or 2,
The tip position of the waist support portion when the chair is used is lower than the back support portion provided on the front surface of the rear desk.
According to this feature, the waist support part can be rotated without interfering with the rear back support part when using the chair, and the seated person can use the waist support part and the back support part to be less tired and have a stable sitting comfort. Obtainable.

The chair according to claim 4 of the present invention is the chair according to any one of claims 1 to 3,
The front end portion of the waist support portion in the seating state of the chair is located obliquely rearward with respect to the rear end portion of the top plate.
According to this feature, a space is secured between the front end portion of the waist support portion and the rear end portion of the top of the desk in the accommodated state of the chair. Since the tip portion of the part can be gripped, it is easy to rotate the seat plate.

The chair according to claim 5 of the present invention is the chair according to any one of claims 1 to 4,
A plurality of the chairs are arranged along the longitudinal direction of the desk.
According to this feature, it is possible to arrange many chairs and desks in an aligned state in a space intended to accommodate a large number of people such as lecture rooms, and the space can be used effectively. Even if a plurality of chairs are arranged along the longitudinal direction of the desk, a sufficient space is secured between the chair and the desk arranged behind the chair, so that the user can sit without taking a cramped posture. In addition, it is easy to pass between the chair and a desk placed behind the chair, and the cleaning operation can be performed smoothly.

  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 perspective view showing an overall image in which desks and chairs are arranged in a lecture room of an educational facility or the like in the embodiment of the present invention, and FIG. FIG. 3 is a side view of FIG. 1, FIG. 3 is a side view showing a state in which a seated person has not yet been seated, and FIG. 4 is a side view showing a state in which the leg strut is rotating. FIG. 6 is a side view showing a state in which a seated person is seated, FIG. 6 is a side view showing a state of the chair after the seated person has stood up, and FIG. FIG. 8 is a side view illustrating a state in which the chair passes through the back of the chair, and FIG. 8 is a side view illustrating a state in which the passer-by passes through the back of the chair in a state where the seated person is seated. Hereinafter, the left side of FIG. 1 and FIG. 2 is the front side of the chair, the right side of the paper is the rear side of the chair, the upper side of FIG. 1 is the left side of the chair, and the lower side of the paper is the right side of the chair. The upper side of the paper in FIG. 2 will be described as the upper side of the chair, and the lower side of the paper will be described as the lower side of the chair.

  As shown in FIG. 1, in an educational institution or lecture room 1, a plurality of desks 2 (configured in three rows in the present embodiment) installed at appropriate intervals in the front-rear direction, A chair 3 installed behind each desk 2 and a boundary board 4 installed at the rearmost part are arranged.

  The desk 2 includes a rectangular top plate 5, a leg 6 that supports the top, a reinforcing plate 7 that reinforces the leg 6, a top support 8 and a leg base 9 that are attached to the leg 6. , Is composed of.

  The top plate 5 is supported by the top plate support member 8 and the upper end surface 6 a of the leg body 6, and the leg body 6 supports the desk 2 with the leg 2 stably by the lower end surface and the leg base body 9.

  Further, a back support portion 10 is formed on the front upper portions of the second row and the last row of desks 2 and the boundary board 4 so that the back of the seated person is supported while the seated person is seated. Preferably, the upper end portion of the back support portion 10 is formed in a round shape downward from the top surface of the top plate 5 so that there is no discomfort even if the back contacts. In the present embodiment, the back support 10 is not provided on the front row of desks 2 because no seated person is seated in front of them.

  The boundary board 4 provided behind the last row of desks 2 is formed of a leg body 6, a reinforcing plate 7, a back support portion 10, and a leg base body 9. The constituent members of the boundary board 4 have substantially the same configuration as the structure in which the top plate 5 and the top plate support material 8 are not provided in the second row and the last row of desks 2, and thus the description thereof is omitted.

  A plurality of chairs 3 (three legs in this embodiment) are arranged along the left-right direction of the desk 2, that is, the longitudinal direction of the desk 2, and the chair 3 is a seat that mainly supports the sitting posture of the seated person. The plate 11, the leg column 12 that rotates the chair 3 in the front-rear direction, and the base 13 that supports the seat plate 11 and the leg column 12 are formed.

  The seat plate 11 is formed in a substantially L shape in a side view, and a mounting plate 11 c that is attached to the leg column 12 is formed on the lower side surface of the seat plate 11.

  The seat plate 11 has a waist support portion 11a that supports the waist of the seated person when the seated person is seated. The waist support portion 11a extends upward from the rear end of the seat plate 11. It is extended toward. In addition, a tip portion (hereinafter referred to as a tip portion) 11b in the upper portion of the waist support portion 11a is positioned below the top plate 5 in the accommodated state of the chair 3 described later, and the tip portion 11b It is located obliquely rearward with respect to the rear end portion 5a at the rear (see FIG. 2). As will be described in detail later, in a state where the leg support 12 is rotated backward and the chair is used, the distal end portion 11b of the waist support portion 11a is attached to the top of the desk 2 disposed behind the chair 3. The front end portion 11b is positioned below the back support portion 10 while being close to the lower front surface of the plate 5 (see FIG. 5).

  The leg support 12 is formed of a pipe made of metal or the like, and the inside of the leg support 12 is formed hollow, and an attachment member attached to the attachment plate 11c of the seat plate 11 is provided at the upper end of the leg support 12. 12a is provided. In addition, the mounting surface of the mounting member 12a to the mounting plate 11c is formed as an inclined surface so that the front is lowered. When the seat plate 11 is mounted on the leg column 12, the seat plate 11 is attached to the leg column 12. It is in a state of leaning forward.

  The base 13 includes a base portion 13a, a lid portion 13b integral with the base portion 13a, and a biasing member made of a spring or the like provided in the lid portion 13b. The base portion 13a is fixedly attached to the floor surface 14 with screws. The lid portion 13 b covers the lower end portion of the leg column 12. Further, the lower end portion of the leg column 12 is pivoted inside the lid portion 13b.

  Although the internal configuration of the lid portion 13b is not particularly illustrated, the base portion 13a has a shaft bar that faces in the left-right direction, and the leg column 12 is pivotally supported by the shaft rod so as to be rotatable in the front-rear direction. Further, around this shaft rod, one end is elastically contacted with the inner peripheral surface of the front of the leg column 12 and the other end is elastically contacted with the base 13 to urge the leg column 12 forward with respect to the base. A spring 13c as a biasing means is wound (see FIG. 2).

  As shown in FIG. 2, the leg column 12 normally maintains the chair 3 tilted forward, that is, the accommodation state of the chair 3, as shown in FIG. 2. When the leg is rotated backward against the elastic force, the leg column 12 is rotated to a position closer to the lower front surface than the top plate 5 of the desk 2 disposed behind. Although not shown, a known stopper mechanism that stops the movement of the leg strut 12 between the forward tilt position and the sitting position of the chair 3 is incorporated.

  Due to the internal configuration of the lid portion 13b, the chair 3 is maintained in the forward tilted state by the bias of the spring 13c in the accommodated state of the chair 3 to be described later, and an external force directed backward from the accommodated state is applied to the leg strut 12. As a result, one end of the spring 13c elastically contacted with the front inner peripheral surface of the leg support 12 is maintained in this elastic contact state and elastically deformed rearward, while the leg support 12 rotates. ing.

  Next, a usage example of the chair 3 will be described with reference to FIGS. In the present embodiment, the seated person H will be described as sitting on the chair 3 on the left side in the front row.

  As shown in FIG. 2, when the seated person H is seated, the seated person H moves to a passage R formed between the chair 3 and the desk 2. In this state, the chair 3 is not used and the chair 3 is in the accommodated state. In this accommodated state, since the seat plate 11 is attached in a state of being tilted forward with respect to the leg column 12, the seat plate 11 is arranged in a state shortened in the front-rear direction. As a result, the base 13 can be arranged at a position closer to the desk 2 and the interval in the front-rear direction between the desks can be shortened. A chair can be placed.

  Then, from the state of FIG. 2, the leg support 12 is rotated backward to move to the operation of using the chair 3. As shown in FIG. 3, the seated person H moves the seat plate 11 rearward and uses the chair, so he puts his hand on the tip 11 b of the seat plate 11. In this state, the chair 3 is still housed. In this accommodated state, the front end portion 11b of the waist support portion 11a is located below the desk 2 ′ top plate 5 and the front end of the waist support portion 11a with respect to the rear end portion 5a of the top plate 5 of the desk 2 ′. The portion 11b is located obliquely rearward, and a gap S is formed between the front end portion 11b of the waist support portion 11a and the rear end portion 5a of the top plate. Thereby, since a space is ensured between the front end portion 11b and the rear end portion 5a of the top plate, the seated person H can easily hold the front end portion 11b of the waist support portion 11a using this space.

  Next, as shown in FIG. 4, a rotating operation is performed to rotate the leg struts 12 backward by applying an external force in the rearward direction while the seated person H puts his hand on the seat plate 11 from the state of FIG. 3. . In this state, following the pivoting of the leg struts 12 backward, one end of the spring 13c is elastically deformed with an increased elastic force while elastically contacting the front inner peripheral surface of the leg struts 12.

  Then, the leg support 12 is rotated backward from the state of FIG. 4 to a position where it can be seated. After the completion of the rotation of the leg support 12, the seated person H sits on the seat plate 11 as shown in FIG. 3 is used. In the state in which the chair 3 is used, an external force directed backward is applied to the leg support 12 by the weight of the seated person H, and the seat plate 11 does not return forward due to the elastic force of the spring 13c.

  In the state of FIG. 5, the distal end portion 11 b of the waist support portion 11 a of the seat plate 11 is closer to the lower front surface than the top plate 5 of the desk 2 disposed behind the chair 3. Thereby, when a seating operation of the seat plate 11 is performed, a seated person who uses the desk 2 arranged behind the chair 3 (a virtual seated person not shown sitting on the chair 3 in the second row) Even if you reach out your hand carelessly, your fingers won't get caught. Furthermore, even if an article such as a book is placed around the front of the top plate 5 of the rear desk 2, it is possible to prevent the article from coming into contact with the distal end portion 11b of the waist support portion 11a. Further, since the waist support portion 11a is closer to the lower front surface than the top plate 5 of the desk 2 disposed behind the chair 3, the desks can be installed at a small interval.

  Further, in the state of FIG. 5, the back support portion 10 is formed at the upper part of the front surface of the rear desk 2, and the distal end portion 11 b of the waist support portion 11 a is positioned below the back support portion 10. Thereby, when the seated person H sits in a backrest using the back support portion 10, it is possible to obtain a stable sitting comfort that is less fatigued.

  When leaving the seat, the seated person H stands up and retreats from the chair 3. Then, after the seated person H retreats from the chair 3, no external force is applied to the leg support 12 in the rearward direction, so that the leg support 12 is moved forward by the elastic return force of the spring 13c as shown in FIG. It rotates and returns to the accommodation state in which the chair 3 is accommodated under the top plate 5. The chair 13 is automatically accommodated by the spring 13c without bothering the user to accommodate the chair 3.

  In particular, in this embodiment, three chairs 3 are arranged along the longitudinal direction of the desk 2, but many chairs can be arranged according to the length of the desk, so that a large number of people can be accommodated. It is suitable for use in lecture rooms for the purpose. Further, even if a plurality of chairs 3 are arranged along the longitudinal direction of the desk 2, a sufficient space can be secured between the chair 2 and the desk 2 arranged behind, so that the user can sit without taking a cramped posture. be able to.

  Further, in the present embodiment, as described above, the seat plate 11 is attached in a state of being tilted forward with respect to the leg column 12. For this reason, as shown in detail in FIG. 7, the base 13 can be arranged at a position closer to the desk 2, so that the chair 3 and the desk 2 behind the chair 3 in the accommodated state of the chair 3. Since a sufficient space can be secured, the passer-by T can easily pass the passage R behind the chair 3.

  In addition, even if a plurality of chairs 3 are arranged along the longitudinal direction of the desk 2 ′ in the state of FIG. 7, a sufficient space is secured in the chair 3 and the desk 2 ′ arranged behind the chair 3, During cleaning or the like, the cleaner can easily pass through the passage R, and the cleaning operation can be performed smoothly.

  Further, in this embodiment, the leg support 12 is pivotally supported so as to be pivotable in the front-rear direction while being biased forward with respect to the base 13 by the spring 13c. Therefore, as shown in FIG. 8, when the passerby T ′ is seated on the chair 3 on the back side of the chair 3 on which the seater H ′ is seated while the seater H ′ is seated, as shown in FIG. When the seat occupant H 'leans forward and takes the middle waist posture, the leg support 12 rotates forward by the elastic return force of the spring 13c following this, so that the chair 3 and the back of the chair 3 are Since the passage width of the passage R with the desk 2 ′ is sufficiently secured, the passer-by T ′ can pass through the passage R.

  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 leg support 12 is pivotally supported in a state of being biased forward with respect to the base 13 by the spring 13c, but is not limited thereto. It does not have to be urged forward by the urging means such as, etc., when the chair is used, it is rotated to the use position where the leg column can be manually seated, and after the chair is used, the leg column is manually rotated to the storing position. You may move and accommodate a chair under a desk.

  Moreover, in the said Example, although the waist support part 11a was extended toward upper direction from the rear-end part of the seat board 11, not only this but a separate waist support part is attached to a seat board integrally. May be used.

  Moreover, although the back support part 10 demonstrated in the example arrange | positioned continuously between the leg bodies 6, you may arrange | position partially according to the width | variety of a chair.

  Moreover, the chair 3 in the present embodiment is not limited to a chair for an educational institution, but can be applied to chairs and desks such as meeting rooms, conference rooms, and waiting rooms, for example.

It is a perspective view which shows the whole image by which the desk and the chair arrangement | positioning are carried out in the lecture rooms, such as educational facilities in the Example of this invention. It is a side view of FIG. It is a side view which shows the state where the seated person has not seated yet. It is a side view which shows the state which the leg support | pillar is rotating. It is a side view which shows the state in which the seated person is sitting. It is a side view which shows the state of the chair after a seated person stands. It is a side view which shows the state where a passerby passes back of a chair in the accommodation state of a chair. It is a side view which shows the state where a passer passes behind the chair in the state where the seated person is seated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lecture room 2 Desk 3 Chair 4 Boundary board 5 Top plate 5a Rear end part 6 Leg 6a Leg upper end surface 7 Reinforcement plate 8 Top plate support material 9 Leg base body 10 Back support part 11 Seat board 11a Waist support part 11b Tip (tip)
11c Mounting plate 11d Seat surface 12 Leg support 12a Support member 13 Base 13a Base portion 13b Cover portion 13c Spring 14 Floor surface H Seated person H 'Seated person

Claims (5)

A plurality of desks supporting the top board on the legs fixed to the floor are installed at appropriate intervals in the front-rear direction, and chairs installed behind each of the desks are fixed to the floor. A leg strut that is pivotally supported so as to be pivotable in the front-rear direction with respect to the base, and a seat plate attached to the leg strut, and by rotating the leg strut forward In the chair accommodated below the top plate,
A waist support portion is formed at the rear end portion of the seat plate, and the front end portion is below the top plate in the housed state, and the leg support is rotated rearward. In a state where the chair is moved and used, the chair is arranged closer to the front face below the top plate of the desk disposed behind the chair.   The chair according to claim 1, wherein an inclined portion to which the seat plate is attached to be tilted forward is formed at an upper end portion of the leg support.   The chair according to claim 1 or 2, wherein a tip position of the waist support portion is lower than a back support portion provided on a front surface of a rear desk when the chair is used.   The chair according to any one of claims 1 to 3, wherein a portion of the front end of the waist support portion in the accommodated state of the chair is located obliquely rearward with respect to a rear end portion of the top plate.   The chair according to any one of claims 1 to 4, wherein a plurality of the chairs are arranged along a longitudinal direction of the desk.

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