JPH0729906Y2 - Chair - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention rotatably attaches a seat to a base, and when seating straight, the seat is tilted substantially horizontally (slightly forward) By placing it on the seat, it reduces the burden on the legs due to the weight of the upper body, and when sitting with the crossed legs or legs extended, the stand can be used as a backrest by standing up. It is related to the sitting chair.

SUMMARY OF THE INVENTION In the present invention, a pedestal supporting member is erected on one side of a pedestal formed to a size that allows a person to sit upright, and the pedestal supporting member is erected on the upper side of the pedestal supporting member substantially horizontally with respect to the pedestal. Attach the pedestal so that it can rotate within the range of standing upright from the above state, lay down the pedestal substantially horizontally with respect to the base, sit down on it, and bend both legs. Keep the seat in a so-called seated state by placing it under the seat and placing your knees on the base, and when not seated, rotate the seat by about 60 ° to stand it up. In a seat chair that can be used as a backrest, either one of the base or the seat support member, and the seat, an engaging portion and an engaged portion for engaging each other to stand up the seat. At least one of the engaging part and the engaged part is provided with the engaging part and the engaged part. By coupling a spring member for returning the Zadai the standing direction when defeating the seats engage and thereby erecting the seats, when engaging the engagement portion and the engaged portion,
The seat is kept upright by the spring force of the spring member.

2. Description of the Related Art When sitting on a table and writing to a table or reading a book, the legs are hurt or numb because the weight of the legs is entirely over.

Therefore, a pedestal support member is erected on one side of the base that is formed to a size that allows the user to sit straight, and the pedestal is attached to the upper end of the pedestal support member, and the seat is seated on the pedestal. A seat chair that allows sitting upright has been developed.

By the way, in the conventional seat chair of this type, the seat is generally fixed to the upper end portion of the seat support member standing upright on the base in a state where the seat is substantially horizontal, so that the use is extremely limited. I will end up.

Therefore, in recent years, a pedestal has been developed so that it can be used as a backrest by rotatably attaching the pedestal to the upper end of the pedestal support member and erecting the pedestal.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, since the conventional seat chair that can be used as the backrest described above is merely a rotatably mounted seat base supporting member, There was a problem as described in.

(1) It is difficult to maintain the pedestal in an upright state, and the pedestal may fall down every time the user stands up.

(2) When used as a backrest, so-called backlash is unstable.

(3) It is difficult to position the knees and ankles on the base at the time of sitting straight, and it is unstable, and it is impossible to sit straight for a long time.

The present invention has been made for the purpose of solving the above conventional problems.

Means for Solving the Problems A pedestal supporting member is erected on one side of a pedestal formed to have a size that allows the user to sit straight, and the pedestal supporting member is erected on the upper side of the pedestal supporting member substantially horizontally to the pedestal. In the seat chair in which the seat is rotatably mounted in the range of the upright state from the above state, one of the base or the seat support member and the seat are engaged with each other. An engaging portion and an engaged portion for erecting the pedestal are provided, and at least one of the engaging portion and the engaged portion is engaged with the engaging portion and the engaged portion to form a seat. A spring member was connected to return the seat to the standing direction when the base was tilted.

When the seat is used as a backrest, the seat is rotated in the upright direction to engage the engaged portion with the engaged portion, and the seat is rotated by the spring force of the spring member. It is given and maintained in the standing state.

When the seat is tilted by applying a force in the anti-upright direction by tilting the upper half of the body backward while using it as a backrest, the spring member expands, giving the backrest a force to return to the upright direction. To do.

Furthermore, bulging portions are provided at one end and the other end of the upper surface of the base, respectively.

Embodiment Next, a seat chair of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of a seat chair 1 according to the present invention. The seat chair 1 has a seat support member 3 on one side of a base 2 formed to a size that allows an adult to sit on it. Within the range of a state in which the seat 4 is erected upright, and the seat 4 is tilted substantially horizontally (slightly forward) with respect to the base 2 by the hinge 5 on the upper end portion of the seat support member 3 and is made to stand substantially vertically. Engagement part provided at one end thereof (the end on the side approaching the base 2 when the seat 4 is raised) while the seat 4 is rotatably attached and the seat 4 is raised. 6
Is engaged with the engaged portion 7 provided on the seat supporting member 3, the seat 4 is given a turning force in the standing direction by the spring force of the spring member 8 having the engaging portion 6 attached to one end side. hand,
It stands upright.

The base 2 is formed by covering the surface of the plate material with thick cloth. A bulge 11 is formed on one end of the upper surface of the base 2 so that the knee is swelled in a large arc when a person sits on it. A cushion is provided in the bulge 11. It is loaded with materials to protect the knees, and the other end of the upper surface of the base 2 has a bulging part 12 that swells in a small arc when the seat is seated. A cushion material is provided in the bulging portion 12 so as to protect the ankle.

The pedestal support member 3 has a large-diameter metal pipe 13 erected on one end side of the base 2, and a small-diameter metal pipe 14 slidably fitted to the large-diameter metal pipe 13. A pedestal support plate 15 made of a rectangular metal plate that is supported substantially horizontally with the central portion of the lower surface fixed to the upper end of the small-diameter metal pipe 14, and the peripheral surface of the large-diameter metal pipe 13. A height adjusting screw 16 which is screwed into a screw screwing hole provided on the upper end of the metal pipe 13 and presses the tip of the height adjusting screw 16 onto the outer peripheral surface of the small diameter metal pipe 13, and a knob 17 for rotating the height adjusting screw 16. When the knob 17 is used to rotate the height adjusting screw 16 in one direction so that its tip is separated from the outer peripheral surface of the small-diameter metal pipe 13, the small-diameter metal pipe 13 becomes slidable, and the seat base The height of the support plate 15 can be adjusted, and when the knob 17 is turned in the other direction, the tip of the height adjustment screw 16 has a small diameter. The metal pipe 13 is pressure-bonded to the outer peripheral surface of the metal pipe 13 to fix the metal pipe 13 in a non-sliding state, and the pedestal support plate 15 is fixed to a predetermined height position.

Similarly to the case of the base 2, the seat 4 is formed by covering the surface of the plate material with a thick cloth and filling the cushion material in the cloth, and on the lower surface side of the plate material, the seat support is formed. A metal plate 18 having substantially the same shape as the plate 15 is attached. One end side of the metal plate 18 is rotatably supported by the hinge 5 on one end side of the pedestal support plate 15, and when the hinge plate 5 is rotated in the clockwise direction as shown in FIG. The metal plate 18 overlaps the pedestal support plate 15 to support the pedestal 4 in a substantially horizontal state, and when the pedestal 4 is rotated counterclockwise from this state, the pedestal 4 is shown in FIG. It becomes a backrest.

Then, when the engaging portion 6 provided on one end side of the seat 4 is engaged with the engaged portion 7 provided on the seat supporting member 3, the seat 4 is maintained in the upright state.

Further, the spring member 8 is a belt 19 having the engaging portion 6 attached thereto.
And a coil spring 20 connected to the belt 19, one end side of the coil spring 20 (belt 19
And the side opposite to the side where it is attached) is fixed to one end side of the pedestal 4 (the end on the side separated from the base 2 when the pedestal 4 is erected), and the engaging portion attached to the belt 19. 6 is mounted in the pedestal 4 with the other end of the pedestal 4 (the end on the side closer to the base 2 when the pedestal 4 is raised) protruding from the center in the width direction. There is.

Then, the seat 4 is rotated in the upright direction to move the engaging portion 6
Is engaged with the engaged portion 7, the coil spring
The coil spring 20 extends when the seat is tilted in the direction of the arrow so that the coil spring 20 is extended to give a rotational force in the standing direction (returning direction) to the seat 4. Has become.

The spring member 8 is mounted in the pedestal 4 in a state where the spring member 8 is retractably housed in a tube 21 made of a soft synthetic resin such as polyethylene or polypropylene. The tube
The spring member 8 is housed in the seat 21 inside the seat 4.
The tube 21 is made of a soft synthetic resin so that a so-called rubbing noise is not generated when the spring member 8 expands and contracts. 22 is a frame of the base 4. Further, the seat 4 is prevented from rotating with respect to the seat support member 5 by a predetermined angle θ or more due to the structure of the hinge 5 or the stopper.

Since the seat chair 1 of the embodiment has the above-mentioned configuration, the engagement portion 6 and the engaged portion 7 are disengaged, and the seat 4 is laid down on the seat support member 15, so that the seat 4 is in a substantially horizontal state. Therefore,
If you sit down on the pedestal 4 and fold both legs under the pedestal 4 and put your knees on the bulging part 11 of the base 2, put the weight of your upper body on the pedestal 4 and put the load on both legs. It is possible to maintain the sitting posture with a reduced amount.

When using the pedestal 4 as a backrest, the pedestal 4
Is rotated in the upright direction to engage with the engaging portion 6 and the engaged portion 7, the seat 4 stands up and is ready for use as a backrest. In the state of being used as a backrest, for example, when the back is stretched and the upper half of the body is tilted backward, the spring member 8 extends and follows the movement of the upper half of the body, and the seat 4 as the backrest rotates. Will be done.

In the embodiment shown in the drawings, the engaging portion 6 is attached to the spring member 8 so that the engaging portion 6 side is expanded and contracted. However, the engaged portion 7 is attached to the spring member 8 and the engaged portion 6 is attached. 7 may be expanded and contracted.

Effect of the Invention Since the seat chair according to the present invention has the structure described above, it has the following effects.

(1) The seat can be maintained in an upright state by engaging the engaging portion and the engaged portion.

(2) The spring member provides the seat with a rotational return force, so it prevents rattling when the seat is used as a backrest, and even if the seat is collapsed by an external force, it immediately stands up. It is possible to return to the state.

[Brief description of drawings]

FIG. 1 is a side view of the chair according to the present invention when it is used for a sitting position, FIG. 2 is a side view of the seat which is used as a backrest while standing upright, and FIG. 3 is a plan view. 1 ... seat chair, 2 ... base, 3 ... seat support member, 4 ... seat,
6 ... Engaging portion, 7 ... Engaged portion, 8 ... Spring member, 11, 12 ... Swelling portion.

Claims (1)

[Scope of utility model registration request] 1. A pedestal support member is erected on one side of a pedestal formed to a size that allows a seat to be seated, and an upper portion of the pedestal support member is
In a seat chair to which a seat is rotatably attached in a range of a state in which the seat is laid down substantially horizontally from a state in which the pedestal is erected in a substantially vertical state with respect to one of the base and the pedestal support member. , The seat is provided with an engaging portion and an engaged portion that engage with each other to raise the seat, and at least one of the engaging portion and the engaged portion is provided with the engaging portion. A spring member that engages the engaged portion and returns the seat to the upright direction when the seat is tilted is engaged, and bulges are provided at one end and the other end of the base, respectively. Seat chairs that are characterized.