JPS641125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a chair that also functions as a three-step step stool.

(Prior Art) The height of the seat of a chair is set based on its original function, that is, the height that is just right for seating.

By the way, since this seat has a surface extending in a substantially horizontal direction, it may be used as a step stool. In other words, when approaching objects in high places that are difficult to reach, for example, when carrying out work such as putting things in and out of shelves installed at high places, or installing or repairing ceiling-mounted electrical appliances. For example, it is common practice to use a nearby chair as a step stool.

(Problems to be Solved by the Invention) However, when using the chair as it is as a step stool, the seat on which the feet are placed is considerably higher than the floor, and care must be taken when getting on and off the seat. This can even be dangerous, especially for young children and elderly people. On the other hand,
The height of the seat is considerably lower than the ceiling,
For this reason, simply climbing onto the seat did not allow sufficient access to objects located at high places, which sometimes caused inconvenience.

The present invention was made in consideration of the above-mentioned circumstances, and allows a chair to be used also as a step stool.
To provide a chair that can be used as a step stool, which allows easy getting on and off from the step stool and allows the user to go up to a higher place.

(Means and effects for achieving the technical problem) The present invention provides a chair with a backrest,
Focusing on the height difference between the seat and the backrest, we placed the backrest in a chair position, that is, in addition to the position where the seated person's back rests, we also set the backrest in a position that is higher than the seat by leaning backwards from the seat. The footboard can be placed in a substantially horizontal position, and is supported by the backrest support frame in this position. On the other hand, the seat part has a divided structure into a front seat part and a back seat part, and the front seat part is arranged in a chair position that is on the same plane as the rear seat part, and a chair position that is lower than the chair position and is located on the same plane as the rear seat part. It is designed to be able to be raised and lowered so that it can be placed in a lower position for the footboard. With this configuration, in addition to the original function of the chair, it can also be used as a step stool with three steps. That is, when used as a step stool, the rear seat part serves as a middle step board, the front seat part serves as a lower step board that is lower than the rear seat part, and the backrest serves as a high step board that is higher than the rear seat part. When the backrest assumes the footboard position, it is supported by the backrest support frame, so even if a person rides on this backrest, it will not roll backwards.

(Embodiment) FIGS. 1 to 5 show a first embodiment of the present invention, and 1 indicates a chair. In FIGS. 1 and 2 showing the state in which it is used as a chair, a chair 1 has a seat part 2 that extends substantially horizontally, and a backrest 3 that extends substantially vertically, and both 2 and 3 are connected by a frame 4. Supported. The seat portion 2 has a two-part structure including a front seat portion 2a and a rear seat portion 2b, as will be described in detail later.

The frame 4 is formed of a hollow pipe, and has a pair of left and right support frames 5, 5 each extending in the vertical direction. The lower parts of the supporting frames 5, 5 form the legs on the rear side of the seat 2, and are reinforced and integrated with a horizontal frame 6 (only the lower horizontal frame is shown in the figure) stretched across the middle and lower end. The supporting frame 5 has a seat frame 7 attached to the front side thereof.
and a foldable backrest support frame 8 are attached.

The seat frame 7 consists of a rear seat frame 9 formed by bending a pipe approximately at right angles, and a front seat frame 10 attached to the front side of the rear seat part 9. The rear seat frame 9 has its rear end integrally fixed to approximately the middle of the support frame 5 by welding, and extends toward the front side of the support frame 5 in a substantially horizontal direction to constitute a frame that supports the rear seat portion 2b. , rear seat frame 9
The front side hangs downward. As mentioned above, the seat part 2 is divided into approximately half into the front seat part 2a and the rear seat part 2b.
The front side edges of each have a shape 2c that bulges forward in the lateral center, while the rear side edge of the front seat part 2a has a concave shape to match the front side edge of the rear seat part 2b. ing. In the seat part 2 having a split structure as described above, the rear seat part 2b is attached to the upper part of the rear seat part frame 9 by a fastening member such as a bolt, and is positioned (fixed) at the seat height of a normal chair. has been done. A front seat frame 10 that supports the front seat 2a is integrally fixed to the front lower part of the rear seat frame 9, and the front seat frame 10 has four upright hollow pipes 12.
and a seat support frame 13 loosely fitted into the upright hollow pipe 12 from above. The upright hollow pipes 12 have approximately half the length of the above-mentioned hanging portion of the rear seat frame 9, and are arranged at each corner of the front seat section 2a. The two upright hollow pipes 12 on the rear side are each integrated by welding to the lower front side of the rear seat frame 9 described above, and the two upright hollow pipes 12 on the front side are The frame 4 is integrated with the extending auxiliary frame 14 to form the front leg. The front seat part 2a is attached to a pair of front and rear seat support frames 13, each of which is a substantially U-shaped hollow extending laterally and bent so that its both ends hang downward. Consists of pipes. Each of the four bent ends of the two seat support frames 13 is slidably fitted into the corresponding upright hollow pipe 12 from above. Thereby, the front seat part 2a is raised and lowered in accordance with the sliding movement of the seat part support frame 13 with respect to the upright hollow pipe 12. As shown in FIG. 3, a through hole 20 is bored in the upper end of each of the upright hollow pipes 12, and a nut 21 is welded so that the center line of the through hole 20 is aligned with the through hole 20. On the other hand, a through hole 22 is also provided at the lower end of the seat support frame 13 (lower part of the bent part), and when this through hole 22 matches the through hole 20, the front seat part 2a and the rear seat part 2b are connected. are set at a height such that they are on the same plane, and with both through holes 20 and 22 aligned, the seat support frame is inserted by inserting the bolt 23 screwed into the nut 21 into the through hole 22. 13, that is, the front seat portion 2a is fixed in position on the same plane as the rear seat portion 2b. Furthermore, by operating the bolt 23, the front seat portion 2a is positioned at a footboard position lower than the rear seat portion 2b. That is, by withdrawing the tip of the bolt 23 from the through hole 22, the lower part of the seat support frame 13 is connected to the upright hollow pipe 12.
The bent corner portion of the seat support frame 13 is received at the top of the upright hollow pipe 12, whereby the front seat portion 2a is fixed in position approximately at the height of the upright hollow pipe 12, and the footboard position is fixed. I'm starting to take it. The backrest 3 has a bulging part 3a whose upper end edge bulges upward at the center in the lateral direction, and a pair of hinges 30 provided at an interval in the lateral direction at the upper part of the back side. It is connected to the support frame 5.
As a result, the backrest 3 is rotatable around an axis extending in the horizontal direction, that is, the rotational axis of the seat plate 30, and has a chair position extending approximately vertically and approximately 270 degrees rearward from this chair position. The footplate can be rotated to select a substantially horizontally extending position. FIG. 4 shows the details thereof. As shown in FIG. 1, when the backrest 3 is used as a backrest for a seated person, the load of the backrest is supported by the support frame 5. Further, when the backrest 3 is rotated rearward and is in the footboard position shown in FIG. The load when riding is borne by the backrest support frame 8.

The backrest support frame 8 has legs 3 extending in the vertical direction.
2, and a mounting portion 33 that is welded to the upper and middle portions of the leg portions 32 and extends in the front-rear direction.
A pipe 34 extending in the vertical direction is integrally provided at the front end. This pipe 34 is fitted into the reduced diameter portion 5b formed in the support frame 5 so as to be rotatable about the vertical axis, and thereby the backrest support frame 8 is connected to the pair of left and right support frames. 5,5
The storage position stored in the space sandwiched by the chair position, that is, the position along the back of the backrest 3 in the chair position (see Figures 1 and 2), and the use position supporting the backrest 3 in the footboard position ( (see Fig. 5) can be selected selectively.

When the chair 1 configured in this way is used as a chair, first, as shown in FIGS. 1 and 2, the front seat 2a is moved to the chair position, that is, the back seat 2
The position is fixed by operating the bolt 23 to a position flush with b, the backrest 3 is set in the chair position extending approximately in the vertical direction, and the backrest support frame 8 is folded into the storage position described above. It is offered as a sitting.

When using this chair 1 as a step stool,
Lower the front seat part 2a and set it at the footboard position, and turn the backrest 3 approximately 270 degrees clockwise in FIG. position. As shown in FIG. 5, the chair 1 as a step stool set in this manner has a step-like form in which the front seat part 2a, the back seat part 2b, and the backrest 3 are arranged in order on the rear side, and has three steps. It will function as a stepping stone. That is, the front seat part 2a functions as a lower step, the rear seat part 2b functions as a middle step, and the backrest 3 functions as a high step. At this time, since the bulges 2c and 3a provided on the respective footboards (steps), that is, the front seat part 2a, the rear seat part 2b, and the backrest 3, extend in the direction of the heel of the person's foot, As a result, there is a large amount of tread, which increases the sense of security for those going up and down the stairs.

FIGS. 6 and 7 show other embodiments of the present invention, and the same elements as those in the previous embodiments are given the same reference numerals and their explanations will be omitted.

In this embodiment, the backrest 3 is divided into upper and lower halves, with an upper back part 40 and a lower back part 41, which are connected to each other at the back plate 42, so that only the upper back part 40 can be tilted backward so as to function as a footboard. It was designed to do so. In this case, the lower back part 41 is fixed to the upper end of the support frame 5, and the support of the upper back part 40, that is, the support in the chair position and the footboard position, is centered around an axis fitted to the support frame 5 and extending in the vertical direction. An L-shaped pipe 43 that is rotatable is used. The position of this L-shaped pipe 43 may be fixed in the same manner as the position of the seat support frame 13 described above (FIG. 3). In this case, the through holes 44 and 45 formed in the L-shaped pipe 43 may be spaced apart in the vertical direction and shifted by 90 degrees, and their rotational positions may be selectively changed. That is, when the upper back part 40 is in the chair position, the L-shaped pipe 43 is fixed at a position extending along the back surface of the upper back part 40, so that it receives the load when the backrest is placed. When the upper back 40 is tilted and set at the footboard position, the L-shaped pipe 43 is rotated 90 degrees to the rear of the chair 1 and pushed down to fix it, thereby supporting the upper back 40 in a substantially horizontal position. do it. By doing so, there is an advantage that the height difference between the backrest 3 and the rear seat portion 2b can be increased, and the area for supporting the back of the seated person can be increased when the backrest 3 is in the chair position.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, but also includes the following modifications.

(1) The backrest 3 may be configured to be tilted around its lower end, taking into account the level difference with the rear seat portion 2b when used as a step stool.

(2) In addition, the backrest 3 was designed to be able to rotate freely using the hinges 30 and 42, but instead of this, the backrest 3 can be tilted backwards using a long hole and a pin inserted through the long hole. It may be done as follows.

(3) In order to finely adjust the height of the footplate position of the front seat portion 2a, for example, a plurality of through holes corresponding to the through holes 22 are formed at intervals in the vertical direction in the pipe 13 shown in FIG. You may also do so.

(4) Adjust the height of the rear seat part 2b, for example by adjusting the height of the front seat part 2a.
This may be done by the same means as used for. In this case, it can be used to adjust the height of the seat when used as a chair (in this case, it is necessary to set the height relationship with the front seat 2a), or to adjust the height of the middle step when used as a step stool. It can be used for adjustment. In this case, a ring may be fixed to the rear end of the rear seat support frame to which the rear seat part 2b is attached, and the ring may be loosely fitted into the support frame 5.

(5) The backrest support frame 8 may be fixed to the rear side of the support frame 5.

(Effects of the Invention) As is clear from the above description, the present invention is extremely effective as it can function not only as a chair but also as a three-step step stool if necessary.

In particular, when used as a step stool, the step board is located both lower and higher than the seat when used as a chair.
It is possible to get on and off the step stool safely and easily, and it is also possible to go up to a considerably high position, so that it has a sufficient function as a step stool.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, in which FIG. 1 is a perspective view when set as a chair, FIG. 2 is a front view of the chair in the state shown in FIG. 1, and FIG. The figure is a cross-sectional view of a main part showing a mechanism for fixing the front seat in the chair position, FIG. 4 is a side view showing how the backrest is attached, and FIG. 5 is a perspective view when the chair is set as a step stool. FIGS. 6 and 7 show other embodiments of the present invention, with FIG. 6 being a perspective view of the backrest, and FIG. 7 being a sectional view showing the support structure for the upper back. 1: Chair, 2: Seat, 2a: Front seat, 2b: Back seat, 3: Backrest, 4: Frame.

Claims (1)

[Claims] 1. A chair equipped with a seat and a backrest, wherein the seat has a divided structure into a front seat and a back seat, and the front seat is flush with the back seat. The backrest is movable up and down so as to be able to take a chair position and a footboard position that is lower than the chair position and lower than the rear seat part, and the backrest is arranged in a position on the rear side in addition to the chair position. The backrest is configured to be able to fall down to a substantially horizontal footboard position at a higher position than the rear seat, and in the footboard position, the backrest is attached to a backrest support frame attached to the chair frame. A chair that doubles as a step stool.