JP2020068932A - Seat for chair - Google Patents

Abstract

To provide a seat for a chair, where a whole periphery of a peripheral edge of a skin material is easily and reliably fixed to a frame.SOLUTION: A base plate 15 and a cushion material 16 are arranged on an upper part of a frame 14, and the whole part is covered by a skin material 17 concerning a seat for a chair. An inward bent wall 19 is arranged in a lower part of the frame 14. A ring-shape resin band 21 is attached to a peripheral edge of the skin material 17. The resin band 21 is elastically folded to an inside of the inward bent wall of the frame 14. Then, outward repulsive force to be generated by the folding is utilized to fix the peripheral edge of the skin material 17 to the frame 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chair seat.

  The seats of chairs installed in theaters, movie theaters, music halls, etc., have a structure in which a board and cushioning materials are placed on top of a metal frame with a horizontal axis of rotation and the whole is covered with a skin material. Has become.

  There are various forms of fixing the peripheral edge of the skin material, for example, there is a method in which the peripheral edge of the skin material is wound around the back side of the substrate and fixed with an adhesive as in Patent Document 1. However, there has been a problem that skill is required for the work of adhering and fixing the entire peripheral portion of the skin material while winding it so that wrinkles do not occur. There is also a method in which the peripheral edge of the skin material is wrapped around the back side of the substrate and stopped with a tucker, but again it requires skill and a large number of tuckers must be hit, resulting in poor workability. ..

  Also, since many metal frames equipped with a rotating shaft have an L-shaped cross section with the lower end protruding inward, the peripheral edge of the skin material is fixed to the metal frame using a metal clip. Is also used. However, it is necessary to use many clips of 20 or more in order to securely fix the entire periphery of the skin material so that wrinkles do not occur, and it requires skill and a great deal of work. There was a problem.

JP, 2001-95644, A

  Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a seat for a chair in which the entire circumference of the peripheral portion of the skin material is simply and reliably fixed to the frame.

  The present invention made to solve the above problems is a seat for a chair in which a substrate and a cushioning material are arranged on an upper part of a frame, and the whole of them is covered with a skin material, and the frame has a lower surface facing inward. The skin material has a ring-shaped resin band attached to its peripheral edge, and this resin band is elastically folded inside the inward bending wall of the frame. It is characterized in that the peripheral edge of the skin material is fixed to the frame by utilizing the outward repulsive force generated by the folding.

  It is preferable that the skin material is a sewn product such as cloth, vinyl leather, or leather, and a resin band is sewn on the peripheral portion thereof. Further, as in claim 3, it is preferable that the resin band is a resin core material having a constant width, and both ends thereof are connected to form a ring shape.

  The chair seat of the present invention elastically folds a ring-shaped resin band attached to the peripheral edge of the skin material into the inwardly bent wall of the frame, and utilizes the repulsive force generated by this fold to form the skin material. The peripheral edge portion of is fixed to the frame. Therefore, there is an advantage that the skin material can be fixed easily and surely, as compared with the conventional structure using the adhesive or the metal clip.

It is an overall view of a chair provided with a seat of an embodiment. It is a partial expanded sectional view of the seat of an embodiment. It is a perspective view showing the state before covering with a skin material. It is a perspective view which shows the state which covered the skin material. It is a perspective view which shows the state in the middle of bending. It is a perspective view showing the completion of bending. FIG. 5 is a conceptual cross-sectional view corresponding to FIG. 4. FIG. 6 is a conceptual cross-sectional view corresponding to FIG. 5. FIG. 7 is a conceptual cross-sectional view corresponding to FIG. 6.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall view of a chair including a seat 10 according to an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view thereof. The seat 10 of a chair installed in a theater, a movie theater, a music hall or the like can be flipped up around a horizontal rotary shaft 11 provided at the rear when not in use. 12 is a backrest and 13 is a side wall.

  As shown in FIG. 2, the seat 10 has a structure in which a base plate 15 and a cushion material 16 are arranged on an upper portion of a metal rectangular frame 14, and the whole is covered with a cloth skin material 17. The material of the skin material 17 may be vinyl leather, leather, or the like. The metal frame 14 has an L-shaped longitudinal section, and is provided with an inwardly bent wall 19 at least in the lower part thereof. The rotating shaft 11 is welded to the inner surface of the vertical wall 20 of the frame 14. FIG. 3 shows a state before covering with the skin material 17.

  The cushion material 16 is formed on the upper surface of the substrate 15, and is made of urethane foam resin in this embodiment. The surface of the cushion material 16 and the side surface of the frame 14 are covered with a skin material 17. The above configuration is not particularly different from the conventional product, but the present invention has a great feature in the method of fixing the peripheral edge portion of the skin material 17, and will be described below.

  As shown in FIG. 4, the skin material 17 is sewn in a bag shape in a shape capable of accommodating the frame 14, the substrate 15, and the cushion material 16. Then, a ring-shaped resin band 21 is attached to the peripheral portion of the opening.

  The resin band 21 has a certain width having appropriate rigidity and elasticity, and in this embodiment, a polypropylene band having a width of 5 to 15 mm and a thickness of 0.5 to 3.0 mm, which is commercially available as a resin core material. Is used. It is more preferable that the resin band 21 has a width of 10 to 15 mm and a thickness of 2.0 to 3.0 mm. The resin band 21 has a ring shape in which the ends thereof are joined by sewing, bonding, welding, connecting tools, or the like. It is preferable that the entire length thereof be substantially equal to the inner peripheral length of the rectangular frame 14. The material of the resin band 21 is not limited to polypropylene, and other resins can be used.

  The resin band 21 is preferably attached to the peripheral portion of the opening of the skin material 17 sewn in a bag shape by a sewing machine. However, it is not necessarily limited to sewing, and it is also possible to adhere or weld.

  After the ring-shaped resin band 21 is attached and the opening is manually deformed, the cloth-like skin material 17 sewn in a bag shape is put on the frame 14, the substrate 15 and the cushion material 16, and the State. If no external force is applied, the opening of the resin band 21 becomes substantially circular as shown in FIG. 4 due to the rigidity and elasticity of the resin band 21.

  Next, the peripheral edge of the skin material 17 to which the resin band 21 is attached is elastically folded inside the inwardly bent walls 18 and 19 of the frame 14. The ring-shaped resin band 21 tries to maintain the state of the circular ring shown in FIG. 3 by its own rigidity and elasticity, but a part thereof can be bent inward by applying an external force. By utilizing the property of the ring-shaped resin band 21, the fibers are sequentially woven, and finally the state shown in FIG. 5 is obtained. When this last portion is elastically deformed and folded inward, the ring-shaped resin band 21 expands outward inside the frame 14 due to the outward repulsive force generated by the folding, and as shown in FIG. The part is fixed to the frame 14.

  7 to 9 are conceptual sectional views showing the above-described folding step. FIG. 7 shows a state corresponding to FIG. 4, and the ring-shaped resin band 21 is in a circular ring state. FIG. 8 shows a state in which folding is being performed by applying an external force, and corresponds to FIG. In the state of FIG. 8, a repulsive force that causes the resin band 21 to restore its original shape is generated. In this way, when the hand is released, the resin band 21 returns to the original circular ring state and is brought into close contact with the inner surface of the vertical wall 20 of the frame 14 as shown in FIG. 9, that is, the state shown in FIG. At the same time, the peripheral edge of the skin material 17 is fixed in close contact with the frame 14.

  Although it is inevitable that the skin material 17 will slightly overlap at the corner portion, in an actual seat, a lid plate (not shown) is further attached to the lower surface of the bending wall 19 below the frame 14, The lower surface of the bending wall 19 is invisible from the outside, and there is no fear of reducing the commercial value.

  As described above, in the chair seat of the present invention, the peripheral portion of the skin material 17 is fixed to the frame 14 by utilizing the repulsive force of the ring-shaped resin band 21 attached to the peripheral portion of the skin material 17. Therefore, the skin material can be fixed more easily and surely than the conventional structure in which the adhesive or metal clip or tucker is used for fixing.

10 Seat 11 Rotating Shaft 12 Backrest 13 Sidewall 14 Frame 15 Substrate 16 Cushion Material 17 Skin Material 19 Lower Bending Wall 20 Vertical Wall 21 Resin Band

Claims (3)

  A chair seat in which a base plate and a cushioning material are arranged on an upper part of a frame, and the whole is covered with a skin material, and the frame is provided with an inwardly bent wall at a lower part thereof, and the skin material is A ring-shaped resin band is attached to the periphery, and this resin band is elastically folded inside the inward bending wall of the frame, and the outward repulsive force generated by this folding is used to make the skin A chair seat characterized in that the peripheral edge of the material is fixed to the frame.   The chair seat according to claim 1, wherein the skin material is a sewn product such as cloth, vinyl leather, or leather, and a resin band is sewn on the peripheral portion thereof.   The chair seat according to claim 1 or 2, wherein the resin band is a resin core material having a constant width, and both ends thereof are connected to form a ring shape.