JP2012085763A - Chair with armrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with an armrest which enables the armrest to be safely used when the rear part of a seat is rotated in vertical directions.SOLUTION: The chair with an armrest includes: a support base 5 supported by a leg; a seat 6 that is pivotally mounted to the support base 5 using an axle 9 facing in the lateral directions and where the rear part is rotatable in vertical directions; an impelling means 10 that is provided at the support base 5 and upwardly impels the seat 6 at the rear of the axle 9; and an armrest 14 provided to the support base 5. When the rear part of the seat 6 rotates in a vertical direction, the height of the armrest 14 does not change, and therefore arms or other body parts are not squeezed between the top board of a desk and the armrest 14.

Description

  The present invention is a chair with an armrest, and in particular, when not in use, the rear part of the seat is lifted up, and when the seated person sits, the seat abuts against the seated person's buttocks and rotates together with the buttocks to a substantially horizontal position. Thus, the present invention relates to a chair with an armrest that guides seating and raises the rear part of the seat to assist standing when the seated person stands up.

In this type of chair, the seat is supported so as to be rotatable between a non-use position in which the seat is inclined rearward and upward with respect to the lower structure of the chair and a use position in which the seat is inclined horizontally or rearward and downward. There is an apparatus in which an urging means for urging the urchin toward the non-use position is provided, and a backrest is provided at the rear part of the seat (for example, see Patent Document 1).
On the other hand, there is one in which an armrest is connected to a seat (see, for example, Patent Document 2).

JP 2010-104463 A Japanese Patent No. 3156115

  It is desirable to provide an armrest on a chair in which the rear portion of the seat rotates between the non-use state and the use state as described in Patent Document 1. However, when the armrest is attached to the seat as in Patent Document 2 in the chair as in Patent Document 1, when the seated person stands up from the state of sitting on the seat and putting the armrest under the desk, As the rear part of the seat rotates upward, the armrest also moves upward, and the armrest may come into contact with the top plate of the desk.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a chair with an armrest that can safely use an armrest when the rear portion of the seat rotates.

According to the present invention, the above problem is solved as follows.
(1) A support base supported by a leg, a seat pivotally attached to the support base with a pivot shaft facing in the left-right direction, a rear portion pivotable in a vertical direction, a seat provided on the support base, and the seat There is provided urging means for urging the rear part upward from the pivot, and an armrest whose lower part is connected to the support base and whose upper part stands from the outside of the seat.

  With such a configuration, even if the rear portion of the seat rotates in the vertical direction, the height of the armrest connected to the support base does not change. Therefore, when the seated person stands up from the seat, the armrest does not come into contact with the desk top or the like, so that the chair can be used safely.

(2) In the above item (1), the support base has a shape that expands forward in a plan view, and is inclined forward and upward in a side view, and the armrest is moved to the front portion of the support base. Connect to the side.

  With such a configuration, the horizontal distance between the portion of the armrest on which the seated person sits and the connecting portion of the armrest with the support base can be made relatively short. In addition, the bending moment acting on the connecting portion with the armrest support can be reduced. Therefore, the armrest can be prevented from falling off the support base. Further, since the armrest is connected to the front portion above the rear portion of the support base, the length of the armrest in the vertical direction can be shortened compared to the case where the armrest is connected to the rear portion of the support base.

(3) In the above item (2), the seat is pivotally attached to a front portion located above the rear portion of the support base, and the armrest is connected to the rear of the pivot shaft of the support base.

  With such a configuration, since the armrest can be connected to a place away from the pivot of the support base, the connecting portion can be configured with a thick member to increase the strength. This prevents the armrest from falling off the support base.

(4) In any one of the above items (1) to (3), the armrest includes an L-shaped armrest strut facing in front and an elbow rest member provided on the upper end surface of the armrest strut. The armrest strut is erected upward from the outside of the seat through the support base and below the seat.

  With such a configuration, since the armrest connected to the support base can be separated from the lower surface and side surface of the seat, the armrest can be prevented from hindering the rotation of the seat.

  According to the present invention, when the rear part of the seat rotates in the vertical direction, the height of the armrest connected to the support base does not change, so that the armrest can be used safely.

It is a front view in the non-use state of one embodiment of a chair with an armrest of the present invention. Similarly, it is a side view. Similarly, it is a side view in a use state. Similarly, it is a side view when the backrest is tilted backward in the use state. It is an enlarged plan view which shows the connection structure of the support base and armrest seen from the VV line | wire in FIG. It is the VI-VI line expanded sectional view in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, this armchair-equipped chair includes a leg body 3 having five leg rods 2 having a radial shape with a caster 1 at the tip. In the center of the leg 3, an extendable leg 4 having a gas spring (not shown) is erected, and the rear part of the support base 5 facing forward is fixed to the upper end of the leg 4.

  The support base 5 forms a shallow dish shape (see FIG. 5) having a triangular shape in plan view that expands forward, and is inclined forward and upward in a side view. Further, since the support base 5 has an upward U-shape when viewed from the front and is open to the front, at the time of attaching the member to the support base 5, not only from the side and rear, but also from the front, It is easy to insert tools and the like.

The seat 6 includes a seat plate 7 made of synthetic resin and a cushion material 8 attached to the upper surface of the seat 6. The seat 6 has both front end sides on the front end of the support base 5 and pivots 9 facing left and right. By pivoting each, it is possible to rotate around the pivot axis 9 between a non-use position inclined backward and upward and a use position inclined horizontally or backward and downward as shown in FIG. The rotation range is preferably about 15 degrees.
The seat 6 is always urged upward by the urging means 10 toward the non-use position.

  As shown in FIG. 2, on the both sides of the rear portion of the seat plate 7, the front portions of the portions where the lower sides of the backrest 11 are bent forward are pivotally attached with support shafts 12 facing left and right, respectively. As shown in FIG. 2 and FIG. 3, it can be rotated around the support shaft 12 between a standing position that faces substantially upward and a rearward tilt position as shown in FIG. 4. Note that the specific structure of the backrest 11 and the pivotally attached portion is not directly related to the present invention, and therefore detailed illustration and description thereof will be omitted.

As shown in FIG. 2, the rear portion of the support base 5 and the portion of the backrest 11 below the support shaft 12 are connected by an elastically extendable push rod 13 that faces in the front-rear direction.
When the seat 6 is rotated downward from the non-use position to the use position (see FIG. 3), the lower end portion of the backrest 11 is pushed rearward by the pushing rod 13 so that the backrest 11 is maintained in an upright state. Further, the backrest 11 can be tilted backward as shown in FIG. 4 against the elastic restoring force of the pusher 13 by the elastic contraction of the pusher 13.

  As shown in FIG. 2 and FIG. 5, an armrest 14 is connected to the rear side of the pivot 9 of the both side surfaces 5 a in the front part where the support base 5 is expanded. As shown in FIG. 1, the armrest 14 includes an armrest strut 15 having an L-shape inwardly viewed from the front and extending upward from the outside of the seat 6 through the support base 5 and below the seat 6. The arm rest strut 15 is composed of a relatively soft arm rest member 16 fixed to the upper end of the arm rest strut 15.

  As shown in FIG. 6, the distal end portion of the lower portion of the armrest strut 15 facing the left-right direction below the seat 6 has two fitting projections 17 a and 17 b that are divided into two portions, and two fittings on the outer surface 5 a of the support base 5. A screw 21 inserted into the through hole 20 between the fitting convex portions 17a and 17b from the concave portion 19 for spot facing provided in the lower surface of the armrest column 15 is fitted into the fitting concave portions 18a and 18b. It is fixed to the support base 5 by fitting in a screw hole 23 provided in the boss 22 between 18a and 18b.

  As shown in FIG. 2, the portion of the armrest strut 15 that stands up from the side of the seat 6 has a substantially triangular frame shape whose width in the front-rear direction gradually increases upward in a side view. The upper rear surface of the armrest strut 15 is inclined rearward and upward with a curved surface substantially similar to the front surface of the side of the backrest 11 in a side view.

  In the non-use state shown in FIG. 2, the armchair configured as described above is lifted up by the urging force of the urging means 10 so that the seat 6 is tilted rearward upward. The backrest 11 is held in an upright position substantially facing upward by the extension of the push rod 13.

  In the non-use state of FIG. 2, when the seated person moves his / her hand backward in plan view between the upper rear surface of the armrest column 15 in the armrest 14 and the side front surface of the backrest 11. In addition, a gap is provided so as not to pinch the hand. As shown in FIG. 1, a gap is also provided between the armrest columns 15, 15 in the left and right armrests 14, 14 and the lower surface and side surfaces of the seat 6. Therefore, the armrest 14 does not hinder the rotation of the seat 6.

  When the seated person sits in this state, the seat 6 is rotated to the use position shown in FIG. 3 against the biasing force of the biasing means 10 by the load of the seated person, and the seated person can quickly and properly Can take a sitting posture. At this time, the backrest 11 attached to the seat 6 also moves rearward and downward against the urging force of the push rod 13. Since the back surface of the armrest 14 is inclined rearward and upward, when the backrest 11 moves rearward and downward, the lower part of the armrest 14 where the seated person's hand and clothes are often close to each other are spaced from the backrest 11. Spread. Therefore, it is possible to reduce the risk of putting a hand or an object in this gap.

  When the seated person leans back against the backrest 11 from the seating state shown in FIG. 3 and tilts the back backward, the backrest 10 is elastically contracted by the push rod 13 and the support shaft 12 is centered. It is rotated to a rearward tilt position as shown in FIG.

  When the seat occupant returns his back to the front, the backrest 11 is rotated forward about the support shaft 12 by the extension by the elastic restoring force of the push rod 13, and returned to the original standing position.

  When the seated person tries to stand up from the seating state shown in FIG. 3, the seat 6 is urged by the urging means 10 to turn upward toward the non-use position, and assists the seated person to stand up. Can do.

At this time, the seat 6 and the backrest 11 move to the non-use position as shown in FIG. 2, but the height of the armrest 14 is not changed because it is connected to the support base 5.
Therefore, for example, even when a seated person stands up from a state in which a seated person sits on the seat 6 and puts the armrest 14 under the top board of the desk, the distance between the armrest 14 and the top board of the desk is The armrest 14 does not abut against the top board, and the armrest 14 can be used safely.

DESCRIPTION OF SYMBOLS 1 Caster 2 Leg rod 3 Leg 4 Leg column 5 Support base 5a Side surface 6 Seat 7 Seat plate 8 Cushion material 9 Axis 10 Energizing means 11 Backrest 12 Support shaft 13 Pushing rod 14 Armrest 15 Armrest strut 16 Elbow rest member 17a , 17b Fitting protrusions 18a, 18b Fitting recess 19 Recess 20 Hole 21 Screw 22 Boss 23 Screw hole

Claims (4)

A base supported by legs,
A seat pivotally attached to the support base with a pivot shaft facing in the left-right direction, and a rear portion rotatable in the up-down direction;
A biasing means provided on the support base and biasing a rear part upward from the pivot in the seat;
A chair with an armrest, comprising: an armrest having a lower portion connected to the support base and an upper portion standing from the outside of the seat.   2. The support base according to claim 1, wherein the support base has a shape that expands forward in a plan view, is inclined forward and upward in a side view, and the armrest is connected to a side surface in a front portion of the support base. Chair with armrests.   The chair with an armrest according to claim 2, wherein the seat is pivotally attached to a front portion located above the rear portion of the support base, and the armrest is connected to the rear of the pivot shaft of the support base.   The armrest includes an L-shaped armrest strut inwardly viewed from the front, and an armrest member provided on an upper end surface of the armrest strut, and the armrest strut passes from the support base and below the seat. The chair with an armrest according to any one of claims 1 to 3, wherein the chair stands up from the outside of the seat.

Images