JPH0345627Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a chair that has four legs that stand up vertically and is foldable.

<Prior Art> Conventional folding chairs do not have four legs that stand up vertically, so they lack stability compared to regular chairs that have four legs that stand up vertically. When I put my foot on the seat, it felt unstable and even dangerous.

In addition, a foldable chair with four legs that stand up vertically has, for example, two crosspieces that connect two front legs and two rear legs, which are combined in an X shape with respect to the front and rear legs. When folded, the seat was designed to bend as well.

<Problem that the invention aims to solve> However, in the above-mentioned chair, the seat bends even when the chair is not folded, compared to a normal chair that has four vertical legs and does not have a bendable seat. Therefore, there were problems such as lack of stability and difficulty in using it as a footrest.

The purpose of the chair according to the present invention is to solve the above-mentioned problems and to provide a foldable chair that has four legs that stand up vertically and whose seat part does not bend.

<Means for solving the problems> The means of the present invention for solving the above problems are as follows:
In a chair in which a seat is attached to four legs each consisting of two front legs and two rear legs that stand up vertically, the pivoting part of the upper part of the rear legs is provided at a higher position than the pivoting part of the upper part of the front legs, and The shaft mounting portion of the lower front leg is provided at a lower position than the shaft mounting portion of the lower rear leg, and the shaft mounting portion of the lower front leg is provided outside the shaft mounting portion of the upper front leg, so that the front leg and the rear leg are connected to each other. Two connecting bars are rotatably connected by a pivot, and the upper connecting bar has an outer end at the rear, an outer end at the front of the lower connecting bar, an inner side below the front leg, and an inner side above the rear leg. This feature is characterized in that an inclined portion is formed with a notch at a predetermined angle.

<Function> According to the above means, the front and rear legs can be tilted forward, and when the front and rear legs are tilted forward, the slopes of the front and rear legs and the upper and lower connecting bars align to bring them to the same height. It is something that can be configured.

<Example> Next, an example to which the above means is applied will be described with reference to the drawings.

1 is a perspective view, FIG. 2 is an exploded perspective view, FIG. 3 is an assembly explanatory view, FIG. 4 is a side view, and FIG. 5 is a side view in a flat state.

In the figure, reference numeral 1 denotes two front legs, each of which has bolt holes 1a and 1b drilled in the upper and lower parts thereof to form a shaft attachment part by pivoting a connecting crosspiece to be described later, and a bolt hole 1b in the lower part. is provided at a position outside the upper bolt hole 1a and at a position lower than the lower bolt hole of the rear leg, which will be described later. Further, a sloped portion 1c having an angle of 45 degrees is formed on the lower inner side of the front leg 1.

Reference numeral 2 denotes two rear legs, the upper part of which is formed integrally with the dorsal leg 2', and the upper and lower parts of each having bolts for pivotally connecting connecting bars to be described later. Holes 2a and 2b are drilled, and the upper bolt hole 2a is provided at a position outside the lower bolt hole 2b, and the upper bolt hole 1a of the front leg 1 is
It is provided at a higher position, and an inclined part 2c having an angle of 45 degrees is formed on the inner side of the upper part.

Reference numerals 3 and 4 are connection bars that connect the front leg 1 and the rear leg 2 at their upper and lower parts, and bolt holes 3a, which correspond to the bolt holes of the front leg 1 and the rear leg 2, are provided on the left and right sides of each. 3b, 4a, 4b are perforated, and the rear outer end of the connecting bar 3 and the front outer end of the connecting bar 4 are provided with inclined portions 3c, 4 having an angle of 45 degrees, respectively.
c is formed.

Further, the front leg 1, the rear leg 2, and the connecting bars 3, 4 are rotatably pivoted diagonally below the bolt hole 2a of the rear leg 2 and at the same height as the bolt hole 1a of the front leg 1. When assembled, a stop hole 2d for inserting a stop rod to be described later to stop their rotation is drilled, and a stop hole 3d is drilled in the connecting bar 3 at a position corresponding to the stop hole 2d. These constitute a rotation stopping means for stopping the rotation of the front and rear legs 1, 2 and the connecting bars 3, 4.

Furthermore, a release prevention hole 1d is bored in the front leg 1 to correspond to the stop hole 3d for inserting a stop bar to prevent the stop bar from being released when the front leg 1 is folded into a flat shape. When the chair is made into a flat shape, a flat shape maintaining means is configured to maintain the flat shape.

Reference numeral 5 denotes a connecting crosspiece that connects the two front legs 1, the two rear legs 2, and the two back legs 2' integrally formed with the rear legs 2.

6 is the inclined part 2c of the rear leg 2 and the upper connecting bar 3
The seat part is placed on the seat and is made of a single plate, and the part that comes into contact with the inclined part 2c of the rear leg 2 has a seat angle of 45 so as to match the shape of the inclined part 2c of the rear leg 2. A tilted portion 6a is formed.

Next, the assembly of each member having the above structure will be explained.

First, connect the connecting bars 5, one to the front leg 1, one to the rear leg 2,
and two of them are attached to the dorsal legs 2' at predetermined positions with nails or the like to connect the front legs 1, the hind legs 2, and the dorsal legs 2', respectively.

Next, the connecting bars 3 and 4 are rotatably attached from the outside of the front leg 1 and the rear leg 2 with bolts and nuts, respectively.

Next, the inclined part 6a of the seat part 6 is connected to the inclined part 2c of the rear leg 2.
The chair can be assembled by placing the seat part 6 on the connecting frame 3 and attaching it with nails or the like. However, in this state, if a load is applied to the front, the chair tends to fall forward, so the stop bar 7 is inserted into the stop hole 3d of the connecting bar 3 and the stop hole 2 of the rear leg 2.
d, it is possible to construct a stable chair with four legs standing vertically as shown in FIG.

In the chair assembled and configured as described above, when the stop bar 7 is removed from the stop holes 3d and 2d and the front legs 1 and the rear legs 2 are tilted forward, the inclined portions 1c and 2c of the front legs 1 and the rear legs 2 are The inclined parts 3c, 4c of the upper and lower connecting bars 3, 4 are cut out at an angle of
are cut out at an angle of 45 degrees, so
The inclined parts 1c and 2c, 3c and 4c coincide with each other, so that the front legs 1, the rear legs 2, and the connecting bars 3 and 4 can be configured to have the same height, respectively, so that the chair with the above configuration can be constructed as shown in FIG. As shown in the figure, the seat portion 6 can be folded into a completely flat shape without bending. At this time, by inserting the stop rod 7 into the release prevention hole 1d and the stop hole 3d of the connecting bar 3, this flat shape can be maintained reliably.

In the above embodiment, the dorsal leg 2' and the hind leg 2 are bent and formed integrally, but as shown in FIG. 2
and the dorsal leg 2' may be formed in a straight line.

With the above configuration, the feeling of instability when leaning back is eliminated, and when folded into a flat shape as shown in Figure 6B, the top and bottom are flush, making it possible to stack a large number of chairs. The chairs will not be damaged even if they are placed side by side.

In addition, in the above configuration, the relationship between the front and rear legs 1, 2 and the connecting bars 3, 4 is as shown in FIG. 6A.
They may be connected so that the legs are on the inside and the connecting bars 3 and 4 are on the outside, or conversely, the front and rear legs 1 and 2 may be on the outside and the connecting bars 3 and 4 are on the inside. good.

Further, as shown in FIG. 7, the front and rear legs 1 and 2 may be shortened, and in this case, the bolt holes 3a in the upper part of the connecting bar 3 and the bolt holes 4b in the connecting bar 4 are formed into horizontal grooves. It is preferable to form it as a slide hole.

Furthermore, as shown in FIG. 8, the front and rear legs 1 and 2 may be configured to be long. In this case, the bolt holes 1a at the top of the front leg 1 and the bolt holes 2b at the bottom of the rear leg 2 are formed into vertical grooves. It is best to form it as a slide hole.

If configured as shown in FIGS. 7 and 8 above, the pivoting portions between the front and rear legs 1, 2 and each connecting frame can be moved and folded.

Further, when the bolt hole is formed as a slide hole as described above, it is preferable to attach a thumbscrew or the like so that it can be tightened.

In the above embodiment, an example was explained in which the dorsal leg 2' was integrally formed with the hind leg 2, but as shown in FIG.
Two rods 8 are connected to the intermediate portions of the front and rear legs 1 and 2, and a seat 6 is placed on the two rods 8 to support it, and an armrest 9 is placed on the connecting beam 3. It may be configured as follows. With this configuration, the back part can be formed in the upper part 2'' of the rear leg 2.

Furthermore, in the above explanation, a stop hole for stopping the rotation of the chair is provided in the rear leg 2, and a hole corresponding to this hole is provided in the connecting frame 3. As long as it can be stopped, it may be provided at any position of the front and rear legs 1, 2 and the connecting bars 3, 4.

Furthermore, the release prevention hole 1d may be provided at any position corresponding to the above configuration.

In addition, in the above explanation, the rotation stopping means is
Alternatively, a stop hole for stopping the rotation is provided in the rear leg 2, and stop holes corresponding to the stop hole are provided in the connecting bars 3 and 4, and the stop rod 7 is inserted through the two stop holes. However, the inclined part 2 of the hind leg 2
A magnet (not shown) may be attached to or embedded in the inclined part 6a of the seat part 6 and the seat part 6. With this configuration, when the respective inclined parts 2c and 6a match, they stick to each other and a stable chair can be constructed.

Furthermore, the flat form maintaining means is attached to the stop hole 3 of the connecting bar 3.
Release stop holes 1d are provided in the front legs 1 in correspondence with d, and the stop rods 7 are inserted into these holes.
Magnets may be attached to or embedded in 2c, 3c, and 4c. With this configuration, when the chair is made into a flat shape and the respective inclined portions match, they are attracted to each other and the flat shape can be maintained.

Furthermore, the sloped parts of the front and rear legs 1 and 2 and the sloped parts of the connecting bars 3 and 4 were cut out at an angle of 45 degrees, but when the chair was folded, these parts coincided with each other and could be folded into a flat shape. For example, the notch may be cut at any angle.

In addition, although the front and rear legs 1 and 2 and the connecting bars 3 and 4 are rotatably attached using bolts and nuts, if the front and rear legs and the connecting bars can be configured to be rotatable, what kind of material could be used to attach them? You may.

<Effects of the invention> As mentioned above, the chair according to the invention allows the front and rear legs to be tilted forward, and when the front and rear legs are tilted forward, the inclined parts of the front and rear legs and the upper and lower connecting bars are aligned. Since these can be configured at the same height, the chair can be folded into a flat shape without bending the seat.Furthermore, since the seat does not bend, the chair is highly stable and has a stable foot. It has the advantage that it can also be used as a stand.

[Brief explanation of the drawing]

Figure 1 is a perspective view, Figure 2 is an exploded perspective view, Figure 3 is an assembly explanatory diagram, Figure 4 is a side view, Figure 5 is a side view in a flat state, Figures 6 to 9 are It is an explanatory diagram of an example. 1 is a front leg, 2 is a rear leg, 3 and 4 are connecting bars, 5 is a connecting bar, 6 is a seat, and 7 is a stop bar.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a chair in which a seat is attached to four vertically standing legs each consisting of two front legs and two rear legs, The shaft mounting part of the lower front leg is provided at a position higher than the shaft mounting part of the lower part of the rear leg, and the shaft mounting part of the lower front leg is provided at a lower position than the shaft mounting part of the lower part of the front leg, and the shaft mounting part of the lower front leg is provided at a position higher than the shaft mounting part of the lower part of the front leg. Two connecting bars are provided on the outside and rotatably connected to the front leg and the rear leg, respectively, and the outer end of the upper connecting bar, the outer end of the lower connecting bar in front, and the lower part of the front leg. 1. A chair characterized in that a sloped part cut out at a predetermined angle is formed on the inner side of one side and the inner side above the rear legs. (2) The chair according to claim 1, which is a registered utility model, further comprising rotation stopping means for stopping rotation of the front and rear legs and the connecting frame. (3) When the chair having the above configuration is made into a flat shape,
The chair according to claim 1 or 2 of the utility model registration, characterized in that it is provided with a flat form maintaining means for maintaining the flat form.