JP3893412B2 - Leg folding chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a leg folding chair that is often used in schools, local facilities, pools, and the like, and more particularly to a chaise longue having a plurality of folding legs.
[0002]
[Prior art]
Conventionally, this type of general chair has a U-shaped leg that has a leg that is folded and is fixed with a stopper arm and supported by a support arm, or a circular pipe that is pivotally supported in a cross shape. The main ones were fixed by fitting in the locking metal fittings.
[0003]
[Problems to be solved by the invention]
Conventionally, a leg that is folded and raised, is fixed with a support arm, and a leg formed by supporting a round pipe in a cross shape is fitted into a U-shaped locking bracket and fixed. There is a fact that there is often a trouble that a finger is caught or pinched when the leg is raised or when the leg is fitted into the U-shaped locking bracket.
In addition, force is applied to the legs of the chair not only from above but also laterally. In particular, in the case of a chaise longue, many people may sit and stand at the same time or swing left and right, so a large moment will act on the fixed part of the leg, so there is something that is even stronger and more stable. desired.
In view of the above-mentioned problems of conventional products, the present invention intends to solve a problem that a leg can be folded safely and easily, and further, a chair that is stable when it is raised is fixed. To do.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the leg folding chair of the present invention is a chair formed of a seat portion and a plurality of foldable legs attached to the lower portion of the seat portion.
Provided with a head having a pin groove and an inclined surface portion into which an upper pin fixed at one end to a leg mounting bracket is fitted, and provided with a long hole in the upper central portion and below the contact surface when combined with a separate non-moving body In the longitudinal direction of the long hole, a thick plate-like piston body having a long groove with a protruding terrace at the upper end;
The contact surface when combined with the upper central portion in the pin holes provided and separately from the piston body, below the longitudinal direction of the hole, the two-body with thick plate of non-moving object with a long groove having a projecting terrace at the lower end , A spring is mounted in the long groove and united into one body, and the body is stored in a form in which only the head is exposed inside the cover outer body, and a long hole penetrating the upper part of the cover outer body; The lower pin is inserted into the pin hole in the upper part of the non-moving body and the long hole in the upper part of the piston body, and the leg is foldable.
In addition, a head having a pin groove and a slope portion is provided, a long hole is provided in the upper central portion, and a protruding terrace is formed at the upper end in the lower longitudinal direction of the long hole on the contact surface that is combined with a separate non-moving body. The thick plate-like piston body having a long groove is integrally formed of synthetic resin.
[0005]
Since the leg folding chair of the present invention is configured as described above, when the leg 3 is pulled down, the piston body 11 is lowered, and the upper pin 6 fitted into the pin groove 13 of the head 5 is moved from the fitted state. Float up. Next, when the leg is turned, the upper pin 6 comes off so as to slide down in the direction of the slope. In other words, the leg 3 is pivotally supported by the lower pin 7 and attached to the mounting bracket, so that it can rotate in the direction of the inclined surface and be bent.
On the other hand, when raising and raising the bent leg 3, when the leg 3 is rotated downward, the upper pin 6 begins to climb the slope of the head 5 toward the top and eventually falls into the pin groove 13 The mating state is reached and the legs are raised and fixed in an upright state.
These operations are smoothly performed by the action of the long groove 14 of the piston body 11 and the spring 21 mounted in the long groove 18 of the non-moving body 12, and the upper pin 6 falls into the pin groove to be in a fitted state. After that, since the spring 21 always pushes up the entire leg, the fixed state is stable and the chair 21 is not shaken to the extent that the chair is shaken.
Furthermore, in addition to the contact between the upper pin and the pin groove, there is a contact with each hole (long hole 8, pin hole 20, long hole 10) through which the lower pin and the lower pin are inserted. There is little fixing and stable.
In addition, since the piston body and the non-moving body have a thick plate shape, and the two bodies are united and integrated, the side surface of the body thick plate shape and the inner surface of the cover outer body are surfaces. Contact. In this way, the contact area is large, and the lateral direction is particularly effective and the fixed state is more stable, and the leg folding according to the present invention has sufficient stability and durability even for a chaise longue. Have both.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the leg folding chair of the present invention will be described below with reference to the drawings.
FIG. 1 shows a leg folding chair A according to the present invention, which is formed from three main parts of a seat 1, a leg mounting bracket 2, and a leg 3, and the leg mounting bracket 2 is integrated below the seat 1. Provided with a leg 3 that can be folded in the direction of the arrow in the figure.
[0007]
The two members shown in FIG. 2 are two members that are united and play an important role in constructing the leg 3, and are a piston body of 11 and a non-moving body of 12.
The piston body 11 is usually made by integral molding of synthetic resin. The head portion 5 has a long groove-like pin groove 13 for fitting the pin 6 described later on the top portion, and a slope portion 16 on one side. The lower part of the head is in the form of a rectangular thick plate, a long hole 10 is provided in the upper central part, and small holes 9 for attaching a cover outer body to be described later are provided on the left and right of the long hole. Below, a long groove 14 having a protruding terrace 15 at its upper end is provided in the longitudinal direction.
The non-moving body 12 that is united with the piston body 11 is preferably formed of the same kind of synthetic resin as the piston body, and has a rectangular thick plate shape. A pin hole 20 for insertion, and a long groove 18 having a projecting terrace 19 at the lower end are provided in a longitudinal direction on a contact surface that joins the piston body below the hole.
[0008]
FIG. 3 shows the leg folding part, which is the main part of the present invention. The piston body 11 and the non-moving body 12 are united and united, and the body is entirely in the hollow cover outer body 4. The parts other than the part 5 are accommodated without being exposed, and the cover outer body 4 and the piston body 11 are integrated using a small hole 9 provided in the upper part.
The upper pin of the reference numeral 6 in the figure is fixed to the leg mounting bracket 2 at one end, and is fitted into the pin groove 13 on the head when the leg is raised as shown.
The lower pin 7 is inserted through the long hole 8 of the cover outer body 4, the pin hole 20 of the non-moving body, and the long hole 10 of the piston body, and one end is fixed to the leg mounting bracket.
Accordingly, the leg 3 is pivotally supported by the leg mounting bracket 2 with the lower pin 7, and when the leg is pulled in the direction of the arrow (downward) in the figure, the upper pin 6 is disengaged from the pin groove 13 of the piston body head. The legs can be folded in the direction of the seat as indicated by the arrows.
[0009]
4 shows the front surface in the state of FIG. 3 (the cover outer body, the upper pin, and the lower pin are cross-sectional views). Here, the positional relationship between the protruding terrace 15 of the piston body 11 and the protruding terrace 19 of the non-moving body 12 is shown. As described above, the piston body and the non-moving body are united and integrated. At this time, the projecting terrace 15 of the piston body is located at the upper end in the long groove 18 of the non-moving body, and the projecting terrace of the non-moving body. 19 is located at the lower end of the long groove 14 of the piston body.
That is, each projecting terrace is located at the inner end of the long groove of the mating counterpart, so that it plays the role of a support plate for the later-described spring 21 that is mounted in the long groove.
[0010]
FIG. 5 is a cross-sectional view of the main part of the present invention in the state of FIG. The leg mounting bracket denoted by reference numeral 2 in the figure differs from the channel-shaped one shown in the figure in the shape of a pipe, but this is an example of a related member and is not directly related to the present invention. Thus, the leg folding chair of the present invention is not affected at all.
The spring 21 newly illustrated here is mounted in the long groove 14 of the piston body 11 and the long groove 18 of the non-moving body 12, and when the leg is pulled as shown by the arrow in FIG. The upper pin 6 is removed from the pin groove 13 and the leg 3 is folded, but it restores the pulled leg to its original position and always pushes the leg up when the leg is raised. Therefore, it also plays a role of fixing and holding the upper pin in a state of being fitted into the pin groove 13.
[0011]
【The invention's effect】
Since the present invention has the configuration as described above, like the conventional product, a leg that is folded up is hung and fixed with a support arm by hanging a stopper, or a leg of a round pipe is U-shaped. Since the main member having the function is housed in the cover outer body, it is possible to prevent the trouble of the fingers from being caught or pinched and to be safe.
When the folded leg is raised, if the leg is rotated halfway, the upper pin climbs the slope of the head and is fitted into the pin groove, and the leg is raised and fixed.
To fold it in the opposite direction, pull the leg and rotate it halfway, the upper pin fitted in the pin groove on the head slides down the slope and the fitting state is released, and the leg is folded as it is. Not only can folding and raising be performed easily, but also the raising and fixing is stable and strong against lateral shaking.
[Brief description of the drawings]
FIG. 1 is a leg folding chair according to the present invention.
FIG. 2 is an explanatory diagram of members constituting the main part of the present invention.
FIG. 3 is a partially cutaway explanatory view of components of the main part of the present invention.
FIG. 4 is a diagram illustrating a configuration of a main part of the present invention in a partial cross section.
FIG. 5 is a diagram for explaining a main part of the configuration of the present invention in cross section.
[Explanation of symbols]
A chair 1 seat 2 legs mounting bracket 3 legs 4 cover outer body 5 head 6 upper pin 7 lower pin 8 long hole 9 fixing hole 10 long hole 11 piston body 12 non-moving body 13 pin groove 14 long groove 15 protruding terrace 16 slope part 18 long groove 19 protruding terrace 20 pin hole 21 spring

Claims (2)

In a chair formed from a seat and a plurality of foldable legs attached below the seat,
A head 5 having a pin groove 13 into which an upper pin 6 fixed at one end to a leg mounting bracket 2 is fitted, and a slope portion 16 is provided, a long hole 10 is provided at an upper center portion, and a separate non-moving body. And a thick plate-like piston body 11 having a long groove 14 provided with a protruding terrace 15 at the upper end in the lower longitudinal direction of the long hole on the contact surface when combined with
A thick plate-like non-moving body 12 having a pin hole 20 in the upper central portion and having a long groove 18 having a projecting terrace 19 at the lower end in the longitudinal direction below the hole, which is in contact with a separate piston body, in the lower longitudinal direction of the hole; The two bodies are combined into one body by mounting springs 21 in the long grooves 14 and 18, and the body is stored in a form in which only the head is exposed in the cover outer body, and at the top of the cover outer body. The lower pin 7 is inserted into the long hole 8, the pin hole 20 on the top of the non-moving body 12, and the long hole 10 on the top of the piston body so as to be pivotally supported on the mounting bracket 2, and the leg 3 can be folded. This is a leg folding chair. A head 5 having a pin groove 13 and a slope portion 16 is provided , a long hole 10 is provided in an upper central portion , and an upper end of a contact surface that is combined with a separate non-moving body 12 in the lower longitudinal direction of the long hole. The leg folding chair according to claim 1, wherein the thick plate-like piston body (11) having a long groove (14) provided with a protruding terrace (15 ) is integrally formed of synthetic resin.

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