JPH08126547A - Chair - Google Patents

Abstract

PURPOSE: To facilitate the carrying of a chair by lifting up the seat board in a chair in which the seat board has been constituted in such a manner as to be slidable backward and forward in order that even school children of the lower classes can get on and off the chair having a high seat board. CONSTITUTION: A fixed rail 19 is fitted to a seat-board receiving plate 16 that has been stuck on the inside surfaces of the right and left arm bodies, and to this fixed rail 19, a roller 23 for smoothly carrying out the backward and forward slide of seat board 2 is fitted, and also a soft elastic board 18 for retaining the seat board 2 so as not to be slidable when it is seated is extendedly laid on the surface of the seat-board receiving plate 16. Further, a movable rail 27 of U shape in section for coveringly fitted to the roller 23 from the outside is fixed to the undersurface of the seat board 2, and a cutout part is formed to the lower horizontal piece 27 of the movable rail 27 in such a way that when the seat board 2 is lifted up in the state it has been moved forward, it is coveringly fitted to the roller 23 from below as a lock means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair mainly used by children.

[0002]

2. Description of the Related Art In a chair for children, for example, the actual Kaisho 6
As described in Japanese Patent Laid-Open No. 3-197439 and Japanese Utility Model Publication No. 4-39705, the height of the seat plate and the forward protruding dimension are adjusted according to the growth of the child. In both of these conventional techniques, a seat plate is attached to a pair of left and right legs formed in a rectangular shape in a side view so that the height and front and rear positions of the legs can be adjusted. It is equipped with a step board for placing, and by lowering the seat board according to the growth of children, it is possible to maintain a proper posture without changing the height of the desk.

[0003]

In these prior arts, the seat plate can only adjust its front-rear projection size.
When the child uses the chair, the child is merely held in a position adjusted according to the height of the child. Therefore,
When a child sits in a chair and studies at a desk, he or she sits on the chair with the chair away from the desk, and then pulls the chair toward the desk.

In this case, since the feet of the upper grade children reach the floor, it is possible to pull the chair toward the desk by placing the legs on the floor and becoming the middle waist, but in the case of the lower grade children. Since the feet do not reach the floor and remain on the step board, in the case of children of lower grades, while sitting on a chair, grasp the tabletop of the desk with both hands and pull the tabletop in that state. Since the chair is pulled toward the desk by putting force on both arms, there is a problem that a great burden is placed on the child.

With respect to this point, if the seat plate is constructed so that it can be freely slid by the hand of a child and the seat plate is held so that it cannot slide when seated, the chair is partially placed inside the desk. Since it is possible to get on and off the chair while it is in a state of being intruded, even a child of a lower grade can sit in the chair in an appropriate posture without imposing an excessive burden. However, when carrying a chair, sometimes the front end of the seat plate is grasped and lifted. In this case, if the seat plate is slidable, the seat plate and the legs relatively slide due to the shaking motion when carrying the chair. Therefore, there is a problem that the chair is difficult to carry.

The present invention aims to solve this problem.

[0007]

In order to achieve this object, the present invention provides "a leg and a seat plate that is non-rotatably mounted on the leg and is slidable back and forth. The mounting position is provided with a slide preventing means for holding the seat plate in a non-sliding state by seating, and a lock means for holding the seat plate so that the seat plate cannot be moved back and forth when the front end of the seat plate is lifted ". I chose

[0008]

With the above-mentioned structure, even though the seat plate is configured to be slidable back and forth, the seat plate is locked so that it cannot be slid when the front end of the seat plate is lifted. When carrying the chair with the front end portion, the seat plate and the legs do not slide relative to each other even if the chair shakes.

Therefore, according to the present invention, there is an effect that it is easy to carry even though it is a chair in which the seat plate is slidable so that it is convenient for children of lower grades.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 13 show the first embodiment. FIG. 1 shows the entire chair 1 among these drawings. The chair 1 includes a seat plate 2 made of wood and a pair of left and right frame-shaped legs 3 arranged on both left and right sides of the seat plate 2. A backrest 4 fixed between the upper ends of the left and right legs 3 and a step plate 5 mounted between the lower portions of the left and right legs 3 are provided.

The leg 3 is made of a plate material such as wood and has a height extending above the seat plate 2. The leg 3 has a horizontal support portion 3a having casters 6 and the horizontal support portion 3a. A vertical portion 3b standing upright from the rear end of the support portion 3a, and a flat portion 3 extending from the horizontal support portion 3a in a rearwardly inclined manner and having an upper end
a first slanted portion 3c formed in c ', and the first slanted portion 3c
The second inclined portion 3d extends rearward from the rear surface of the upper end of the a toward the mid-height portion of the vertical portion 3b.

Therefore, the left and right legs 3 are formed in a concave shape toward the line A connecting the step plate 5 and the backrest 4, so that the body of the child is seated above and behind the step plate 5. A space B that can be moved laterally toward 2 is formed. The horizontal support portions 3a of the left and right legs 3 are connected by a pair of front and rear connecting rods 7.

As shown clearly in FIG. 2, horizontal engaging grooves 8 open toward the front and the inside of the chair 1 are formed on the inner surface of the first inclined portion 3c of the left and right legs 3 at appropriate vertical intervals. A plurality of steps are formed, and by fitting the left and right ends of the step plate 5 into the engaging groove 8 and screwing the screws 9 penetrating the left and right first inclined parts 3c into the step plate 5,
The step plate 5 is fixed to the first inclined portions 3c so that the height thereof can be adjusted.

On the other hand, a plurality of holes 10 are formed in the upper ends of the vertical portions 3b of the left and right legs 3 at appropriate intervals in the vertical direction, and the backrest 4 is fixed by screws 11 penetrating the holes 10. In this case, the dowel 12 protruding from the end surface of the backrest 4 is fitted into one hole 10 (see FIG. 2).
In the embodiment, the hole 10 is additionally provided so that the vertical height of the backrest 4 can be adjusted in two steps.

The backrest 4 may be fixed so that the height thereof cannot be adjusted, or the height of the backrest 4 can be adjusted in three steps or more. Further, the backrest 4 can be moved forward and backward with respect to the vertical portion 3b of the leg 3. You may attach it if possible. Next, the mounting structure of the seat plate 2 will be described with reference to FIGS. As shown in FIG. 3, a large number of mounting holes 13 extending along the longitudinal direction of the second inclined portions 3d of the left and right legs 3 are provided at appropriate intervals, and the mounting holes 13 are screwed into the mounting holes 13 from the outside. The height of the spacer plate 15 is fixed to the inner surfaces of the left and right second inclined portions 3d with screws 14, and the seat receiving plates 17 extending upward are fixed to the inner surfaces of the left and right spacer plates 15 with screws. are doing.

The upper and lower portions of the left and right seat receiving plates 16 are formed in a U-shape outwardly when viewed from the front of the chair 1, and the upper ends of the left and right seat receiving plates 16 have a mountain shape in a side view. They are connected by a reinforcing member 17. As an example of slide prevention means, a soft elastic plate 18 made of a material having a large friction coefficient such as rubber is fixed to the upper surface of the horizontal piece 16a at the upper end of the left and right seat plate receiving plates 16.

Further, fixed rails 19 having an L-shaped cross section are fixed to the upper outer surfaces of the left and right seat receiving plates 16 in a front view of the chair 1. Both of the fixed rails 19 protrude to the front and rear of the seat plate receiving plate 16, and as shown in FIG. 5, the side plates 1 of the fixed rail 19 are provided at the front portions of the left and right fixed rails 19.
An oscillating body 20 extending in the front-rear direction is arranged in close contact with 9a, and a rear end portion of the oscillating body 20 is pivotally attached to a bracket 21 provided on a fixed rail 19 by a horizontal pin 22. At the front end of the moving body 20, as a front slide assisting member, a roller 23 that is rotatable around the axial line in the left-right direction is pivotally supported.

On the lower end of the front end of the oscillating body 20, a claw 20a is provided so as to project inward, while on the front end of the side plate 19a of the fixed rail 19, the claw 19a is formed.
A stopper piece 24 is provided so as to project forward so as to overlap with a in plan view. In addition, a compression spring 25 is inserted between the fixed rail 19 and the front-rear halfway portion of the oscillating body 20.

Therefore, the oscillating body 20 is constantly urged by the compression spring 25 in the direction in which the roller 23 moves upward,
In addition, the rocking body 20 can be rotated downward against the elasticity of the compression spring 25. Further, when the claw portion 20a hits the stopper piece 24, the upward rotation posture of the swing body 20 is restricted. As shown in FIG. 6 and FIG. 7A, the oscillating body 2
It is set so that the upper surface of the roller 23 projects above the upper surface of the seat plate receiving plate 16 with the claw portion 20a of 0 abutting on the stopper piece 24 of the fixed rail 19.

At the rear ends of the side plates 19a of both fixed rails 19, a substantially rectangular rear slide assisting tool 26 made of a material having a small friction coefficient such as synthetic resin is fixed.
The rear slide assisting tool 26 is attached with a gap formed between it and the fixed rail 19. The rear slide assist tool 26 may also be a roller. As clearly shown in FIG. 6 and FIG. 7A, the roller 23 and the slide assisting tool 26 are held from the outside on a portion of the lower surface of the seat plate 2 corresponding to the left and right fixed rails 19. A movable rail 27 having a substantially U-shaped cross section extending along the front-rear direction is fixed. Therefore, when no load is applied to the seat plate 2,
As shown in FIG. 6, the seat plate 2 includes a compression spring 25 and a roller 2.
3 is urged upward, so that even children of lower grades can easily move back and forth by hand.

As clearly shown in FIGS. 5 and 6, the stopper plates 2 are provided at the front and rear ends of the movable rail 27, respectively.
7a and 27b are formed by bending, the retracting position of the seat plate 2 is regulated by the front stopper plate 27a hitting the roller 23, and the forward position of the seat plate 2 is set by the rear stopper plate 27b hitting the slide assist tool 26. Regulated.

With the seat plate 2 moved upward by the rollers 23, the lower surface of the movable rail 27 and the fixed rail 19 are larger than the distance between the upper surface of the movable rail 27 and the soft elastic plate 18.
It is set so that the interval dimension between and becomes large. In addition, as shown in FIGS. 6 and 8, a notch 2 that can be partially fitted to the roller 23 in a portion of the movable rail 27 that is located below the roller 23 in a state where the seat plate 2 is fully advanced.
8 forming.

As shown in FIGS. 3 and 4, a cover 29 having an upward opening that covers the fixed rail 19, the movable rail 27 and the like is fixed to the lower surface of the seat plate 2 with screws 30 '. The cover 29 is formed with a long groove 30 which is fitted into the upper portions of the left and right seat plate receiving plates 16 so as to be opened rearward. Therefore, the seat plate 2 can be moved back and forth with the cover 29 fixed to the seat plate 2.

In the mounting structure of the seat plate 2 as described above, the seat plate 2 can be lightly moved back and forth by hand even by a child of a lower grade when the seat plate 2 is not loaded. On the other hand, when a child sits on the seat plate 2, the roller 23 is pushed down against the compression spring 25 and the movable rail 27 is brought into close contact with the soft elastic body 18 of the fixed rail 19, as shown in FIG. The seat plate 2 is held immovable back and forth by the friction of the soft elastic body 18.

That is, the seat plate 2 can be easily moved back and forth by the hand of a child, and is held so as not to be moved back and forth at an arbitrary front and rear position by the seat of the child. In addition,
The soft elastic plate 18 may be provided on the lower surface of the movable rail 27, or may be provided on both the movable rail 27 and the upper surface of the seat plate receiving plate 16. Next, a method of using the chair 1 configured as described above will be described based on FIGS. 11 to 13.

FIG. 13 is a diagram showing a state in which the child C is studying at the desk D in an appropriate posture, and in this state, the chair 1 is inside the desk D (the left leg D1 of the desk D and the sleeve cabinet D2). Between)
Is partially embedded in. The chair 1 is shown in FIG.
In order to allow the child C to study in an appropriate posture as shown in FIG. When the child C sits on the chair 1, the seat board 2 is retracted in advance as shown in FIG.
Standing on the left side of the chair 1), hang one foot (left foot) on the flat portion 3c ′ of the first inclined portion 3c of the leg 3 or the step plate 5 and grasp the backrest 4 with one hand (right hand), Then, from the space formed between the step plate 5 and the legs 3 and the desk D, the body which is made to climb is desk D
By making it enter the space between the left and right legs 3,
As shown in FIG. 12, the upper half of the body is positioned above the seat plate 2 and is in a middle waist state.

Then, with both feet resting on the step plate 5, by grasping the left and right edges of the seat plate 2 with both hands, the seat plate 2 is moved forward while maintaining the posture, and the seat plate 2 is moved to the proper position. When you pull it out, sit down. As a result, it is possible to study in an appropriate posture as shown in FIG. The procedure for reversing from the chair 1 may be performed in the reverse order (however, it is not always necessary to retract the seat board 2 when descending).

As described above, since the child C can get on and off the chair 1 with the chair 1 previously put in the desk D, the child C is not overloaded. Then, when the seat plate 2 is lifted upward while the seat plate 2 is fully advanced, the notch 28 formed in the movable rail 27 fits and engages with the roller 23 from below as shown in FIG. The seat plate 2 is held non-retractably in the advanced position, so that when the front end of the seat plate 2 is lifted and the leg 2 is lifted to move the chair 1, the seat plate 2 and the leg 2 slide relatively. Therefore, the chair 1 can be easily carried.

As shown as a second embodiment in FIG. 14, an armrest 31 may be rotatably attached to the upper end of the leg body 3.
In the first embodiment, the notch 28 is formed in the movable rail 27 as the locking means, and the notch 28 is fitted and engaged with the roller 23 as the front slide assisting tool. As shown as a third embodiment in FIG.
An outward protrusion 32 on the bracket 21 for mounting the 0
Alternatively, the notch 28 of the movable rail 27 may be engaged with the protrusion 32 from below.

FIG. 16 shows a fourth embodiment showing another example of the locking means. In this embodiment, two upper and lower fixed rails 33, 34 are provided on the inner surface of the spacer plate 15 so as to project inward. A plurality of rollers 36 axially supported by leaf springs 35 are provided on the lower fixed rail 34 in the front-rear direction, and the seat plate 2 is supported by these rollers 36 so as to be slidable in the front-rear direction. , A movable rail 37, which is fitted into the upper fixed rail 33 from the inside and has a U-shape in a front view, is fixed.
Soft elastic bodies 38 are provided on the lower surface of 7 and the upper surface of the lower fixed rail 34 so as to face each other, as an example of locking means.

In this embodiment, when no load is applied to the seat plate 2, the seat plate 2 is slidable back and forth by the roller 36, and when seated, the seat plate 2 sinks against the leaf spring 35. As a result, the two soft elastic bodies 38 are in close contact with each other, and the seat plate 2 is held so that it cannot slide back and forth. And
When the front end of the seat plate 2 is lifted while the seat plate 2 is pulled out to an arbitrary position, the lower horizontal piece 37a of the movable rail 37 is tilted between the vertical fixed rails 33, 34 as shown in (b). The movable rail 3
Since the soft elastic body 38 provided in 7 and the soft elastic body 38 provided in the lower fixed rail 35 are in close contact with each other at the rear part, the seat plate 2 is held in a state of being tilted backward so as not to be slidable back and forth.

FIG. 17 shows a fifth embodiment of the slide mechanism for the seat plate 2. In this embodiment, the upward opening C-shaped fixing is made at both left and right ends of the support plate 39 mounted on the left and right legs 3. While the rail 40 is fixed, the movable rail 41 is slidably fitted on the lower surface of the seat plate 2 so that the movable rail 41 cannot be removed. In this embodiment, the seat plate 2 is supported by the roller 36 attached to the plate spring 35. Also,
On the inner surface of the fixed rail 40, a soft elastic body 38 that doubles as a slide blocking means and a locking means is stretched.

FIG. 18 shows a sixth embodiment, which is another example of the slide preventing means, in which the lower surface of the seat plate 2 and the upper surface of the seat plate receiving plate 16 are provided with opposing surfaces in the form of fine irregularities such as chevron. The rack plate 42 formed by the above is fixed, and the upper and lower rack plates 42 are engaged with each other by seating, so that the seat plate 2 is held so as not to slide. The specific embodiment of the present invention is not limited to the above-mentioned embodiments, but can take various other forms. For example, the slide blocking means of the seat plate is disclosed in Japanese Patent Application No. 6-148002 filed by the applicant of the present application.
It may be configured as described in No. Further, it is not necessary to provide a special member as the slide preventing means, and the point is that
It suffices if the seat plate is restrained from sliding easily back and forth due to the weight of the person.

Although the present invention is suitable for children's chairs, it can also be applied to adults of short height, in which case the height of the seat plate and the step plate are always adjustable. No need.

[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 mounting relationship between a backrest and a step plate.

FIG. 3 is an exploded perspective view of a mechanism that supports a seat plate.

4 (a) is a sectional view taken along line IV-IV in FIG. 1 and FIG.
3A is a cross-sectional view as viewed from a, FIG. 1B is a bb view as viewed in FIG. 1A, and FIG.

FIG. 5 is a partially cutaway perspective view showing a main part of a support mechanism for a seat plate.

6 is a sectional view taken along line VI-VI of FIG.

7A is a sectional view taken along line aa of FIG. 7, and FIG.
7 is a sectional view taken along line bb of FIG. 7, and (c) is a sectional view taken along line cc of FIG. 7.

FIG. 8 is a partial perspective view of a movable rail.

FIG. 9 is a sectional view of a seat plate support mechanism in a seated state.

FIG. 10 is a cross-sectional view with a seat plate lifted.

FIG. 11 is a plan view showing a state in which the user is sitting on a chair.

FIG. 12 is a side view showing a state in which the user is sitting on a chair.

FIG. 13 is a side view showing a use state of the chair.

FIG. 14 is a diagram showing a second embodiment.

FIG. 15 is a perspective view showing a third embodiment.

16A and 16B are views showing a fourth embodiment, in which FIG. 16A is a vertical sectional front view of a main part, and FIG. 16B is a sectional view taken along line bb of FIG. 16A.

FIG. 17 is a vertical cross-sectional front view of essential parts showing a fifth embodiment.

FIG. 18 is a vertical cross-sectional side view of essential parts showing a sixth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 chair 2 seat plate 3 leg body 4 backrest 5 step plate 15 spacer plate 16 seat plate receiving plate 18 soft elastic plate as an example of slide preventing means 19 fixed rail 20 rocker 23 roller (front slide auxiliary tool) 25 compression spring 26 Rear Slide Aid 28 Notch as an Example of Locking Means 29 Movable Rail

Claims (2)

[Claims] 1. A leg and a seat plate which is non-rotatably mounted on the leg so as to be slidable back and forth. The seat plate is non-slidingly held by sitting at a position where the seat plate is attached to the leg. A chair characterized in that it is provided with a slide blocking means and a locking means for holding the seat plate so that the seat plate cannot be moved back and forth when the front end of the seat plate is lifted. 2. The "claim 1" according to claim 1, wherein a fixed rail extending in the front-rear direction is fixed to the leg body, and a pair of front and rear slide auxiliary tools are laterally projected on the fixed rail, while the seat plate of the seat plate is provided. On the lower surface, a movable rail having a substantially U-shape in a front view, which is fitted laterally to the front and rear slide assisting tool of the fixed rail,
It is fixed so that it can be tilted backward by an appropriate angle, and when the front end of the seat plate is lifted in the state where the seat plate is fully advanced as the locking means, it is attached to the lower horizontal piece of the movable rail. A chair characterized in that a notch adapted to be fitted from below is formed in the slide assist tool.