JP2009136370A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair of the type of nesting in fore and aft directions while flipping up a seat plate by which there is no need to raise the front portion of the seat plate by hand and the nesting operation can be easily done when nesting. <P>SOLUTION: The seat plate 10 is swingably attached to a seat securing lever 5 and the seat plate 10 is mounted on a seat support portion 3 when sitting. A spring 19 for pressing the seat plate 10 so as to raise the front end of the seat plate 10 upward is arranged between the seat securing lever 5 and the seat plate 10. The chair can be nested without raising the front end of the seat plate 10 by hand by only moving the chair in the fore and aft directions because the front end of the seat plate 10 is a little bit raised upward when nesting. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a chair that can be nested in the front-rear direction, and more particularly to a chair that can be easily nested.

A chair is known in which casters are attached to the lower ends of the front legs and rear legs of the chair, and the seat plate is flipped up so that it can be nested in the front-rear direction. This type of chair generally has to be lifted by hand when nesting, so the nesting work is cumbersome, and the casters move freely in all directions and are unstable when seated. Also, nesting work was sometimes difficult. A chair that has a lifting mechanism at the rear of the seat, connects the seat to the rear leg, and has a roller between the lower parts of the front leg. Has been proposed (see, for example, Patent Document 1). However, in this structure, the rear part of the seat is supported by the rear leg through a pipe or support pin that covers the rear leg so that it can be raised and lowered. There is a risk of injury from the fingers, and it is difficult to ensure strength because the frame on the front leg side moves when the support pin moves. Furthermore, when the chair is lifted, the front leg may rotate around the support pin and be folded to the rear leg side, the front leg support is unstable, and the backrest also moves up and down, making it difficult to sit and break There are easy drawbacks. In addition, since the one roller is provided between the front legs, the lower end of the front legs is blocked by the roller so that it is difficult to sit down, and when sitting, the leg of the seated person gets in the way of the roller, Since it is one long roller, there is a possibility that it does not move well when trying to move in an oblique direction.
Japanese Patent Laying-Open No. 2003-38287 (paragraph 0013, FIGS. 1 and 2)

  The problem to be solved by the present invention is to provide a chair that can be easily nested in the horizontal direction, has a strong structure, and has a good seating feeling.

  According to the present invention, the leg frame having the front legs and the rear legs is provided with the seat support portion and the seat mounting rod, and the seat plate that is swingably attached to the seat mounting rod is placed on the seat support portion and seated. And a biasing means for biasing the seat plate so that the front portion of the seat plate is lifted above the seat support portion when not seated, between the seat mounting rod and the seat plate, There is provided a chair in which the rear portion of the seat plate of another chair is inserted under the seat plate so that nesting can be performed by combining the seat plates so as to overlap in the front-rear direction.

  Further, according to the present invention, the seat support portion is provided in front of the seat mounting rod, and the biasing means is a compression spring provided between a receiving piece projecting from the seat mounting rod and a seat plate. There is provided the above chair provided with a flooring rod having a plurality of rollers at the lower end of the rear leg, thereby solving the above-mentioned problems.

  Furthermore, according to the present invention, there is provided the chair in which the roller is rotatably inserted into a roller shaft inserted into the rear leg and the floor ridge, and the above-mentioned problem is solved.

  The present invention is configured as described above, and a leg frame having a front leg and a rear leg is provided with a seat support portion and a seat mounting rod, and a seat plate swingably attached to the seat mounting rod is mounted on the seat support portion. The seat mounting rod and the seat are provided with biasing means for biasing the seat plate so that the front portion of the seat plate is lifted above the seat support portion when the seat is not seated. It is installed between the boards, and the rear part of the seat of another chair is inserted under the seat so that the seats can be nested and combined in the front-rear direction so that nesting is possible. It is stable and hard to break, and it is provided on the back side of the seat plate, so there is no danger of fingers being pinched and it can be moved in the front-rear direction without lifting the front part of the seat plate by hand. If the rear part of another seat plate enters the lower part of the front part of the seat plate, It is possible to computing.

  In addition, the chair is provided with a flooring rod having a plurality of rollers at the lower end of the rear leg, so that the movement is stable, there is no hindrance to the movement in the oblique direction, and it interferes with the foot when seated. There is nothing, good seating feeling, easy nesting, and this roller is structured to be inserted into the roller shaft inserted into the rear leg and the flooring so that the roller part does not use screws or other fixing tools Can be assembled and economically manufactured.

  FIG. 1 shows an embodiment of a chair according to the present invention, in which a leg frame 1 is formed by bending a metal pipe material into a substantially inverted U shape, connecting the front legs 2 on both sides and the upper ends of the front legs and extending in the lateral direction. Are formed in series. Further, the rear legs 4 that are formed to face each other with a space that can be inserted between the front legs 2 are connected by a seat mounting rod 5 having an intermediate portion extending in the lateral direction, and further, the rear legs 4 are connected to the seat support portion 3 on the front leg side. The seat mounting rod 5 is connected by a connecting rod 6 extending in the front-rear direction, the upper end is bent rearward to form an armrest portion 7, and the backrest is connected to the front end of both sides of the armrest portion 7 by a backrest. The attachment portion 9 is inserted and fixed. In the embodiment, the seat support portion 3 is formed of a hook-like member parallel to the seat mounting rod 5, but when seated, the seat support portion is provided at an appropriate portion of the leg frame so that the lower surface of the seat plate can be supported. It may be provided.

  A seat plate 10 is attached to the seat mounting rod 5 so that it can swing within a predetermined range. In the embodiment shown in the figure, as shown in FIG. 2, a bracket 13 formed with an upright piece 12 facing the side frame 11 so as to surround the seat mounting rod 5 is formed along the seat mounting rod 5. The bracket 13 is fixed to the lower surface of the seat plate 10 with screws 14, the outer periphery thereof is covered with a cover 15, and the cover 15 is fixed to the seat plate 10 with screws 16. A receiving piece 17 extending in a substantially horizontal direction is fixed to the seat mounting rod 5, and when the bracket 13 is attached, the upright pieces 12 face each other so as to be located on both sides of the receiving piece 17. The lateral movement of the plate 10 is restricted.

  When the seat mounting rod 5 is seated on the seat plate 10, as shown in FIG. 3, the seat plate 10 is placed on the seat support portion 3, and when not seated, as shown in FIG. The urging means for urging the front end portion of the seat plate 10 upward is provided so that the front portion of the seat plate 10 is lifted upward from the seat support portion 3. In the embodiment shown in FIG. 2, a support pin 18 is fixed to the receiving piece 17 toward the back surface of the seat plate 10, and a compression coil spring 19 is attached as a biasing means around the support pin 18. One end of the seat plate 10 is brought into contact with the receiving piece 17 and the other end is brought into contact with a washer 20 provided on the lower surface of the seat plate 10 to urge the front end of the seat plate 10 upward. The tip of the support pin 18 is inserted into a receiving hole 21 formed in the seat plate 10, and the seat plate 10 is lifted upward to the position where the tip of the support pin 18 hits the inner edge of the receiving hole 21. . At this time, the angle of the seat plate 10 is only required to be raised at the minimum necessary for nesting. In the embodiment shown in the figure, the angle is about 20 degrees. It should be noted that a leaf spring, a tension spring or other springs may be used instead of the compression coil spring, or an elastic material such as an appropriate synthetic rubber, plastic material or elastomer material may be used.

  A caster 22 is attached to the lower end of the front leg 2, and a floor contact rod 24 having a plurality of rollers 23 is provided at the lower end of the rear leg 4, and the roller 23 rolls on the floor surface. The roller 23 has a plastic roller joint 25 attached to the tip of the bent portion formed by bending the lower end of the rear leg 4 inwardly and a floor contact 24 (see FIG. 5). The shaft 26 is inserted and attached to the roller shaft 26 by being rotatably inserted. The roller 23 is formed in a substantially cylindrical shape with an intermediate portion swelled in an arc shape, and is made of a durable plastic material.

  As shown in FIG. 4, the seat plate 10 has the front end slightly lifted upward when no person is seated as shown in FIG. 4. When the chair is moved in the front-rear direction and the nesting is performed, As shown in FIG. 6, it is possible to easily combine the seat plates so that they overlap each other without lifting the front end of the seat plate 10. At this time, the rear legs 4 are provided so as to be movable in the front-rear direction by the rollers 23. As a result, the chair does not move left and right without permission, and nesting can be further simplified. Further, when seated, the seat plate 10 is securely attached to the seat mounting rod 5 and supported by the seat support portion 3, so that it can be seated in a stable state and can be hardly broken.

The perspective view which shows one Example of this invention. Explanatory drawing of the state which showed the lower surface of the seat board which removed the cover, and isolate | separated the bracket from the seat board. The explanatory view of a part of the state where it sat down on the seat board. An explanatory view of a part of a state where no person is sitting. Sectional drawing of a roller part. Explanatory drawing of a nesting state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leg frame 2 Front leg 3 Seat support part 4 Rear leg 5 Seat mounting rod 6 Connection rod 7 Armrest portion 8 Backrest 10 Seat plate 13 Bracket 17 Receiving piece 18 Support pin 19 Spring 22 Caster 23 Roller 24 Floor contact

Claims (6)

  A leg frame having a front leg and a rear leg is provided with a seat support portion and a seat mounting rod, and a seat plate mounted swingably on the seat mounting rod is placed on the seat support portion and seated, and is not seated. Thus, an urging means for urging the seat plate is provided between the seat mounting rod and the seat plate so that the front portion of the seat plate is lifted above the seat support portion, and below the seat plate. A chair that can be nested by inserting the rear part of the seat of another chair and combining the seats in the front-rear direction.   The chair according to claim 1, wherein the seat support portion is provided in front of the seat mounting rod and the biasing means is a spring.   The chair according to claim 2, wherein the spring is a compression coil spring provided between a receiving piece projecting from a seat mounting rod and a lower surface of the seat plate.   The chair according to claim 3, wherein the spring is provided around a support pin fixed to the receiving piece.   A caster is provided at a lower end of the front leg, a distance between the rear legs is formed so as to be insertable between the front legs, and a floor contact rod having a plurality of rollers is provided at the lower end of the rear leg. The chair according to any one of 1 to 4.   The chair according to claim 5, wherein the roller is rotatably inserted into a roller shaft inserted into a rear leg and a floor ridge.

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