JPH08214975A - Chair - Google Patents

Abstract

PURPOSE: To provide a chair for a child with a structure that is movable in forward and backward directions and the height is adjustable and even an adult can sit on it in a suitable posture. CONSTITUTION: Between right and left frame bodies 2, a seat body 4 is mounted on via a seat supporting body 10 in a way movable in forward and backward directions and the height is freely adjustable. Between the lower parts of right and left supporting bodies, a foot support plate 6 is provided for a pupil whose legs can not reach the floor. The seat body 4 and the foot support plate 6 are set to allow the seat body 4 to be protruded by a suitable length E2 more forward than the foot support plate 6 in a condition the seat body 4 is completely forwarded. A pupil whose legs cannot reach the floor can sit on the seat in a suitable posture by backing the seat body 4 more backward than the foot support plate 6 and an adult whose legs can reach the floor can sit on the seat body 4 without being disturbed by the foot support plate 6 in a suitable posture by completely forwarding the seat body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair suitable for children.

[0002]

2. Description of the Related Art Generally, a chair for a child has a backrest fixed between the upper ends of side frames which are appropriately separated from each other on the left and right sides, and a seat body is adjustable in height between the left and right side frames. It is mounted so that its position can be adjusted, and a footrest plate is placed between the lower parts of the left and right side frame bodies in case the feet do not reach the floor. The desk can be used in an appropriate posture by adjusting the height and front-rear position of the robot and the height of the footrest plate (see, for example, Japanese Utility Model Publication No. 63-48125 and Japanese Utility Model Publication No. 39705). .

Since a person's leg is bent at a substantially right angle in a state where the person sits down in a proper posture, the chairs of the related art including the above publications put their legs on the footrest plate in a proper posture. In order to be able to do so, the footrest plate is configured to project forward from the forward position of the seat body.

[0004]

By the way, the children's chair is not always used only by the children, but may be temporarily used by adults such as parents or siblings of junior high school / high school students. In this case, an adult would sit on the floor with his feet, but if the footrest plate protrudes more forward than the seat as in the past, the calf or Achilles tendon of an adult sitting on a chair will act as a footrest plate. Since it easily hits the front end, there is a problem that it is difficult to use in a proper posture (that is, it is difficult to use safely).

Further, when the child grows up to a certain extent, he / she will sit on his / her feet on the floor, and in this case also, there is a problem that it is difficult to use the footrest plate safely as it is. For these problems, it is considered to be good to remove the footrest plate when sitting on the floor with the foot on it, but it is necessary to remove the footrest plate each time an adult uses it, or if the child grows up, the footrest plate should be removed. Not only is it difficult to remove the board, but it also reduces the strength of the entire chair, which is not a good idea.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a chair that can be used by both children and adults in an appropriate posture without removing the footrest plate. To do.

[0007]

In order to achieve this object, the present invention discloses that "a backrest is attached between the upper ends of the left and right frame bodies,
A seat is mounted between the left and right side frames below the backrest so that the height can be adjusted vertically and the front and rear can be moved, and a footrest plate is mounted between the lower parts of the left and right side frames. In the chair, the seat body and the footrest plate are associated with each other such that the front end of the seat body projects further forward than the front end of the footrest plate when the seat body is fully advanced.

[0008]

With this configuration, when a child of short stature whose legs do not reach the floor when using the desk is used, since the space for using the seat is small, keep the back on the backrest. It suffices to retreat the seat so that it will be in an appropriate posture, and in this state, since the seat is retracted, it is possible to make the footrest plate project further forward than the seat, thus The foot can be placed on the footrest plate in a proper posture.

On the other hand, when the desk is used by a tall child or an adult whose feet are on the floor,
It can be used with the seat body fully advanced, and in this state the footrest plate is located rearward of the seat body, so the calf or Achilles tendon of a person seated in a proper posture should hit the footrest plate. Can be prevented. In other words, adults and tall children who are tall enough to wear their feet on the floor
It can be used in the same condition as a chair without a footrest plate. In this case, since it is not necessary to remove the footrest plates one by one, no labor is required and the strength of the chair does not decrease.

As described above, according to the present invention, there is an effect that both children and adults can safely use the chair in an appropriate posture without incurring the trouble of removing the footrest plate and reducing the strength of the chair. By the way, when an adult who can sit on a chair with his / her feet on the floor uses the desk, he / she should sit down with the chair away from the desk, and then pull the chair toward the inside of the desk. However, it is difficult for a child who cannot reach the floor to pull the chair toward the desk while sitting on the chair.

In this respect, when the seat body is configured to be movable back and forth as in the present invention, even when a child of a lower grade who does not have feet on the floor sits on the chair and uses the desk, the chair is placed inside the desk. Installed in a state where the seat is retracted, let the lower body go inside the desk with the seat retracted once, then move the seat forward with the middle waist state and then sit down Can be easily seated.

In this case, when the seat body is biased in the forward direction by the spring means as in claim 2, the seat body is automatically advanced by the spring means while the lower half of the body is submerged inside the desk. Therefore, it is possible to easily seat a child having a short height on a chair that has been inserted into the desk. In addition, when carrying a chair, generally, the front end of the seat and the backrest are grasped and lifted.In this case, if the chair is lifted without moving the seat forward, the seat will be lifted by the lift. Although there is a risk of moving forward and injuring or dropping the chair, when configured as in claim 2, since the seat body is held in the forward position by the spring means in the state where no external force is applied,
There is also an advantage that the chair can be carried around with the seat body always advanced and thus the chair can be carried safely.

According to the third aspect of the present invention, since the seat body can be tilted backward while retreating, the child having a short height sits on the chair which allows the lower half of the body to sneak into the desk as described above. In doing so, it is possible to prevent the seat body from getting in the way, so that it becomes easier to sit on the chair. In addition, since the seat body is pivotally attached to the side frame body at the rear portion thereof, an external force for tilting the seat body in the seated state does not act, and therefore the seat body can be safely used.

[0014]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 12 show a first embodiment, of which FIG.
Shows the entire chair 1. The chair 1 includes a pair of left and right side frame members 2 made of wood and having an upright portion 2a at a rear portion,
A backrest 3 fixed between the upper ends of the upright portions 2a of the left and right side frame bodies 2 and a seat body 4 mounted between the upright portions 2a of the left and right side frame bodies 2 so as to be adjustable in height and movable back and forth. . The upright portion 2a of the side frame body 2 is provided with a large number of screw insertion holes 5 for vertically adjusting the height of the seat body 4 at appropriate vertical intervals.

A step portion 2b lower than that in the state where the seat body 4 is lowered to the lowermost step is formed in the lower part of the left and right side frame bodies 2, and a footrest plate 6 is provided between the front ends of the left and right step portions 2b. It is fixed. Both left and right end portions of the footrest plate 6 are fitted into engagement grooves 7 formed on the inner surface of the step portion 2b of the left and right side frame body 2, and screwed in that state. By forming the engaging groove 7 and the screw insertion hole 9 in a plurality of steps (three steps in the embodiment), the height of the footrest plate 6 can be adjusted stepwise.

A pair of front and rear casters 9 are attached to the lower ends of the left and right frame bodies 2, respectively. The seat 4 is
The seat support 10 is fixed to the upright portions 2a of the left and right frame bodies 2 so as to be adjustable in height, and is mounted to be movable back and forth. This point will be described below. As shown in FIG. 2, the seat support 10 includes a spacer 12 made of wood or the like that is fixed to the inner surfaces of the left and right frame bodies 2 with two screws 11, and a metal fixed to the inner surfaces of the left and right spacers 12. A plate-shaped support plate 13 and a substantially gutter-shaped stay member 1 connected between the left and right support plates 13
4 and, as shown in FIG. 5, by screwing a screw 15 into the female screw hole 16 of the spacer 12 from the screw insertion hole 5 of the upright portion 2a of the left and right side frame body 2, the seat support body 10 is stepped. I am trying to adjust the height.

An inwardly extending support piece 13a is formed by bending at the upper end of the support plate 13 of the seat support 10, and a friction plate 17 made of rubber or the like is attached to the upper surface of the support piece 13a. On the other hand, reinforcing members 18 extending in the front-rear direction are fixed to the left and right ends of the lower surface of the seat body 4. Also,
The support piece 13 of the support plate 13 of the seat support 10 is provided at a portion of the lower surface of the seat 4 that is inside the reinforcing member 18.
When it is fitted into a from the inside, a guide rail 19 having a substantially U-shaped cross section and a long front and rear direction is fixed by screwing.

As shown in FIGS. 2 to 5, the mounting plate 20 is provided on the inner surface of the front end of the upper portion of the support plate 13 of the seat support 10 so that a space having a rectangular cross section is formed between the support plate 13 and the support plate 13. Is fixed by welding or the like, and a forwardly projecting arm member 21 is arranged in a space formed between the support plate 13 and the mounting plate 20, and a rear portion of the arm member 21 is pivoted laterally to the left and right. On the other hand, the arm member 21 is rotatably pivoted at 22, while a roller 23 is fitted to the front end of the arm member 21 so as to be fitted between the upper and lower horizontal pieces 19a and 19b of the guide rail 19.

Further, as shown in FIG. 4, a through hole 2 at the rear end of the arm member 21 is provided between the support plate 13 and the mounting plate 20.
4 has a pin 25 penetrating therethrough. Arm member 21
The through hole 24 is formed to have a diameter larger than that of the pin 25 so that the arm member 21 can be vertically rotated within a certain range, and the torsion spring 26 fitted to the pin 25 can be rotated.
Thus, the arm member 21 is biased in the direction of rotating upward.

The spring force of the torsion spring 26 is equal to that of the roller 2
The strength is set so that the seat body 4 can be lifted with the number 3. As shown in FIG. 6, the support plate 1 in the seat support 10
A slider 27 made of synthetic resin or the like fitted in the guide rail 19 is fixed to the upper portion of the rear end of the screw 3 with a screw 28. The slider 27 is formed with an engaging portion 27a which is fitted to the rear end edge of the support plate 13, and thereby,
The screws 28 of the book can be attached without backlash.

As shown in FIGS. 6 (a) and 6 (b), at the rear end of the guide rail 19, a rear stopper 29 that abuts the slider 27 in a state where the seat body 4 is advanced is provided so that the seat body 4 is moved forward. Are regulated. In addition, as shown in FIGS. 2 and 9, the seat 4 is provided at the front end of the guide rail 19.
Front stopper 3 that hits the roller 23 when the rear end of the
By fixing 0, the retracted position of the seat body 4 is regulated.

The left and right guide rails 19 are connected to each other through a front connecting rod 31 having an inverted L-shaped cross section and a rear connecting rod 32 having an L-shaped cross section. The left and right intermediate portions of the rear connecting rod 32 and the seat support body. Tensile springs 34, which are examples of spring means, are mounted on left and right end portions of the stay member 14 in FIG. Therefore, the seat body 4 is biased in the forward direction by the tension spring 33.

Then, as shown in FIG. 12, in a state where the seat body 4 is fully advanced, the seat body 4 is set to project forward by an appropriate dimension E2 from the footrest plate 6.
As shown in FIGS. 2 and 8, a cover body 34 that covers the seat support body 10 from below is detachably attached to the lower surface of the seat body 4 with screws. In addition, as shown in FIG.
A notch 35 is formed in the lower horizontal piece 19a of the guide rail 19 so that the roller 23 is partially fitted when the front end of the seat body 4 is lifted while the seat body 4 is advanced. Is also good.

In the above construction, when no external force is applied to the seat body 4, the seat body 4 is supported by the roller 23 and the slider 27 as shown in FIGS. 4 and 7 (a). Therefore, the seat body 4 can be retracted by the tension spring 33. On the other hand, a person sits down on the chair 1 and sits down 4
When the weight of a person acts on the roller 23, the roller 23 is pushed down by the seat 4 as shown in FIG. 7B, and the upper horizontal piece 19a of the guide rail 19 comes into close contact with the support piece 13a of the support plate 13. By this frictional resistance of the friction plate 17, the seat body 4 is held in a state of being unable to move back and forth. In this case, since the seat body 4 is in a state of largely projecting forward from the support plate 13, when seated, a moment acts to rotate the seat body 4 counterclockwise in right side view. When the lower horizontal piece 19b of the guide rail 19 hits against, the seat body 4 is held in a substantially horizontal posture.

When a child C of a lower grade who does not reach the floor F while using the desk 36 uses the desk 36, as shown in FIG.
As shown in Fig. 1, the chair 1 is partially put in the desk 36 in advance, and the seat body 4 is largely retracted with one hand as shown by the chain double-dashed line, and one leg is held while maintaining that state. With the lower half of the body resting inside the desk 36 with the foot resting plate 6 placed, both legs may be placed on the foot resting plate 6 and the sitting body 4 may be advanced to an appropriate position in the middle waist state to sit down. .

In this case, if the height of the child C is short, the sitting space on the seat body 4 is also small. Therefore, depending on the height of the child C, the seat body 4 may be retracted from the footrest plate 6 by an appropriate dimension E1. Therefore, the foot can be placed on the footrest plate 6 under the correct posture. On the other hand, as shown in FIG. 12, when used by a person A who has feet on the floor F such as an adult or a grown up child, it is sufficient to sit down with the seat body 4 fully advanced,
In this case, since the footrest plate 6 is in a state of appropriately retracting from the front end of the seat body 4 by the dimension E2, the calf or the Achilles tendon of the person A does not hit the footrest plate 6,
Therefore, it is possible to sit on the chair 1 in a proper posture.

Further, since the seat body 4 is biased in the forward direction by the tension spring 33, when the short child sits down on the chair 1 partially inserted into the desk, the seat 1 is retreated to a large extent. It is easy to move the body 4 forward according to one's body.
In addition, the front end of the seat body 4 and the backrest 3 are grasped by hand and the chair 1
Since the seat body 4 is held in a fully advanced state by the tension spring 33 when lifting the chair, it is possible to prevent the seat body 4 from moving forward due to the lifted momentum or the chair 1 swinging in the middle of carrying. Therefore, the chair 1 can be safely carried. in this case,
As shown in FIG. 10, the lower horizontal piece 19 of the guide rail 19
By forming a notch 35 in b, which engages with the roller 23 while the seat body 4 is advanced, the seat body 4 and the backrest 3 are formed.
When the chair 1 is grabbed and the chair 1 is carried, it is possible to reliably prevent the seat body 4 from retracting unexpectedly, so that there is an advantage that the chair 1 can be carried more safely.

The spring means for urging the seat body 4 in the forward direction is not limited to the tension spring 33 as in the embodiment, but various springs such as compression springs and torsion springs and elastic bodies such as rubber cords can be used. Things can be used. Further, a spring means such as a tension spring may be provided between the side frame body 2 and the seat body 4. In the above-described embodiment, the roller 23 and the slider 27 are used as means for smoothly moving the seat body 4 back and forth, but, for example, a front slider made of synthetic resin is attached to the arm 21 and the seat body 4 is formed by a pair of front and rear sliders. It is also possible to support the back-and-forth movement of the elastic plate, and not only to use the rotatable arm 21, but to fix one end of an elastic plate such as a leaf spring to the support 10 and the other end of the elastic plate. The slider may be fixed to the. Further, the roller 23 and the slider 27 may be attached to the stay member 14,
The point is that the seat body 4 can be smoothly moved back and forth without being seated.

FIG. 13 shows a second embodiment corresponding to the third aspect. The shape and structure of each member and the structure for sliding the seat 4 are the same as those in the first embodiment, and the support plate 13 with respect to the spacer 12 is arranged. It is different in that it is attached so that it can rotate freely. That is, in this embodiment, the first pin 38 projecting inward on the front part of the spacer 12 is fitted with the round hole 39 drilled in the front part of the support plate 13, and the inward projecting process is carried out on the rear part of the spacer 12. The second pin 40 provided is fitted with an arcuate guide long hole 41 formed in the rear portion of the support plate 13, and the radius of curvature of the guide long hole 41 is set to the distance between the axes of both pins 38, 40. The seat 4 (and the support 10) is tilted rearward by a certain angle θ by making the same size as.

The round hole 39 and the elongated guide hole 41 of the seat body 4
Bushings 42 and 43 made of synthetic resin or the like are fitted to and for smooth rotation. Further, a reinforcing plate 44 is fixed to the support plate 13. The round hole 39
The positions of the guide elongated hole 41 and the guide elongated hole 41 may be reversed. With the configuration of the second embodiment, as shown by the alternate long and short dash line in FIG. 13A, the seat body 4 can be retracted and tilted backward at the same time. Since it is possible to prevent or significantly reduce the seat body 4 from interfering with the child when the child sits down so that the lower half of the body can be submerged, it is easier for the child to get in and out of the chair that has been put inside the desk 36. It is possible.

FIG. 14 shows a third embodiment which is another example for constructing the seat body 4 so that it can be tilted rearward. In this embodiment,
Set the lower part of the spacer 12 to the upright part 2a of the side frame 2 by 1
It is attached rotatably with a screw 15 and the spacer 1
A stopper pin 45 that abuts the rear surface of the upright portion 2a of the side frame body 2 is provided on the upper rear end of the side frame 2 so that the seat body 4 (and the seat support body 10) can be flipped up and rotated. It was done. Needless to say, in the case of a chair having no spacer 12, the support plate 13 may be directly attached to the upright portion 2a of the side frame body 2.

Although some embodiments of the present invention have been described above, it is needless to say that the present invention can be embodied in various structures and modes other than these embodiments.

[Brief description of drawings]

FIG. 1 is a perspective view of a chair according to a first embodiment.

FIG. 2 is an exploded perspective view showing a support means for a seat body.

FIG. 3 is a plan view of an essential part showing a seat body in phantom lines.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

5 is a cross-sectional view taken along line VV of FIGS. 3 and 4. FIG.

6A is a sectional view taken along line VI-VI of FIG. 4, FIG. 6B is a sectional view taken along line bb of FIG. 4A, and FIG. 6C is a perspective view showing a mounting state of a slider.

FIG. 7 is a diagram showing the operation of both (a) and (b).

FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a perspective view of a front end portion of a guide rail.

FIG. 10 is another example of a guide rail.

FIG. 11 is a right side view of a state in which the child is using the device.

FIG. 12 is a right side view of a state in which an adult is using the same.

FIG. 13 is a view showing a second embodiment, (a) is a right side view,
(B) is an exploded perspective view showing a mounting relationship between a support plate, which is a main part, and a spacer.

FIG. 14 is a partial side view showing a third embodiment.

[Explanation of symbols]

 C Child A Adult 1 Chair 2 Side frame 2a Upright 3 Backrest 4 Seat 6 Footrest plate 10 Support 12 Spacer 13 Support 14 Stay member 17 Friction plate 19 Guide rail 23 Roller 33 Extension spring 36 Desk

Claims (3)

[Claims] 1. A backrest is attached between the upper ends of the left and right frame bodies,
A seat is mounted between the left and right side frames below the backrest so that the height can be adjusted vertically and the front and rear can be moved, and a footrest plate is mounted between the lower parts of the left and right side frames. In the chair, the seat body and the footrest plate are associated with each other such that the front end of the seat body protrudes more forward than the front end of the footrest plate when the seat body is fully advanced. Chair. 2. The seat support according to claim 1, wherein the seat support is mounted on the inner surfaces of the left and right side frame bodies so that the height of the seat support is adjustable, and the seat support is attached to the seat support so as to be movable back and forth. Alternatively, a chair is provided with spring means for urging the seat body in the forward direction between the side frame body and the seat body. [Claim 3] In claim 1 or claim 2,
A chair characterized in that the seat body is attached to the left and right side frame bodies so that the seat body can be flipped up and rotated by an appropriate angle around a rear portion thereof.