JP2017042451A - Legless chair convertible to chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a legless chair that functions as a chair, as necessary.SOLUTION: The legless chair includes: a base part 2 having a seating face 2s on the top face; a first backrest part 3 that has a first backrest face 3s on the front face and that is erected on the base part 2; and a second backrest part 4 that has a second backrest face 4s on the surface, that is rotatably installed relative to the first backrest part 3 by a pivotal support part 50 provided in the first backrest part 3, and that is rotatable between a legless chair position J in which the second backrest face 4s goes along the first backrest face 3s and a sitting down position K in which the second backrest face 4s protrudes to the first backrest face 3s; and holding means that holds the second backrest part 4 in the sitting down position K.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seat chair that can exhibit the function of a chair as needed.

  Sitting chairs are widely used in Japanese-style houses having Japanese-style rooms and the like, and various structures and materials have been conventionally produced. For example, those that can adjust the angle of the backrest, those that have armrests, and those that have short legs and a slightly raised seating surface (high chairs) are known.

  In addition to the above, Patent Document 1 describes a seat chair that can maintain a proper posture of a normal seat and can also be used for stretching exercises of the back muscles. Patent Document 2 describes a seat chair having a hammock function.

Utility Model Registration No. 3006072 JP 2013-34789 A

  As mentioned above, the chair is multi-functional and highly functional, and it is devised so that elderly people can spend a very comfortable time sitting on the chair in a Japanese-style room. ing. However, in a home where meals are served at a high table such as a dining table, the elderly must leave the sitting chair and sit on the dining table chair to eat. Compared to a sitting chair, this type of chair is dissatisfied with the elderly in terms of cushioning on the seat and back, the width of the seat, and the material that makes you feel cold during the cold season. There were many easy-to-use products. Therefore, if an elderly person wishes to eat in a comfortable chair, he has to eat at a different table from other family members, and there is a problem that he cannot taste the group.

  An object of the present invention is to provide a product that can be used as a comfortable seat chair in a Japanese-style room or the like and can function as a comfortable chair during a meal or the like.

The present invention has a feature of a seat chair that becomes a chair created in order to achieve the above object.
A base portion having a seating surface on the upper surface;
A first backrest portion that has a first backrest surface in front and is erected on the base;
A second backrest portion having a second backrest surface on the surface and pivotally attached to the first backrest portion by a pivotal portion provided on the first backrest portion; The second backrest surface is pivotable between a seat position along the first backrest surface and a seating position where the second backrest surface projects from the first backrest surface. The backrest of
And holding means for holding the second backrest portion in the sitting position.

In addition, the feature of the seat chair that becomes the chair according to the present invention is:
The base portion includes a base frame having rigidity, and a seat cushion material having flexibility to cover the surface of the base frame,
The first backrest portion has a rigid first backrest frame provided with a pivotal support portion that rotatably supports the second backrest portion, and a flexibility that covers a surface of the first backrest frame. A first backrest cushioning material having
The second backrest portion includes a rigid second backrest frame that is rotatably attached to the pivot support portion, and a second backrest cushion material that has flexibility to cover the surface of the second backrest frame. Prepared,
The pivot portion also serves as the holding means, and the second backrest portion is stopped at a predetermined mid-rotation position between the seat position and the sitting position. It is possible.

In addition, the seat cushion according to the present invention is characterized in that the seat cushion material has a main part that covers the base frame, and an extension part that projects to the front side of the main part, The extension portion can be bent along a boundary portion with the main portion.

In addition, the seat chair that is the chair according to the present invention is characterized in that the first backrest portion has a portion above the folding position at a predetermined folding position above the pivotal support portion. It can be bent to the front side.

According to the seat chair which becomes a chair concerning the present invention, the 2nd backrest part which can be rotated is provided to the 1st backrest part fixed to the base part, and this 2nd backrest part Is held in a direction projecting with respect to the first backrest surface, the second backrest portion constitutes a seat for sitting, and the function as a chair can be exhibited.

  Further, according to the present invention, the second backrest portion can be provided with an inclination different from that of the first backrest surface by holding the second backrest portion at the midway position. That is, since the angle of the second backrest surface can be adjusted according to the user's preference, the comfort as a seat chair can be improved.

Moreover, according to this invention, since it has an extension part, a wide seat surface can be ensured at the time of use as a seat chair. At the time of use as a chair, it is possible to widen the feet of the user sitting on the second backrest portion by bending the extension portion.

According to the present invention, the height of the back can be reduced by bending the upper part of the first backrest. Therefore, since it becomes a compact form by using together with the state which bent the extension part, the volume at the time of packing becomes small, As a result, conveyance and conveyance become easy.

One Embodiment of the seat chair used as the chair which concerns on this invention is shown, Comprising: FIG. (A) is a perspective view of a seat chair form, FIG. (B) is a perspective view of a chair form. BRIEF DESCRIPTION OF THE DRAWINGS One Embodiment of the seat chair used as the chair based on this invention is shown, Comprising: FIG. (A) is a front view of a seat chair form, FIG. (B) is a top view of a seat chair form, FIG. ) Is a right side view of a seat chair configuration. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows an embodiment of a seat chair to be a chair according to the present invention, in which Fig. (A) is a front view of the chair form, Fig. (B) is a plan view of the chair form, and Fig. (C) is a chair form. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a perspective view of an internal frame, and FIG. 1B is a left side view of an internal frame. One embodiment of the seat chair which becomes a chair concerning the present invention is shown, and is a perspective view showing the first procedure which changes from a seat chair form to a chair form. One embodiment of the seat chair which becomes the chair concerning the present invention is shown, and is a perspective view showing the next procedure which changes from a seat chair form to a chair form. One embodiment of the seat chair which becomes the chair concerning the present invention is shown, Comprising: It is a perspective view showing the following procedure which changes from a seat chair form to a chair form. It is a perspective view which shows one Embodiment of the seat chair used as the chair which concerns on this invention, Comprising: After changing to the form at the time of packing. 1 is a left side view showing an embodiment of a seat chair that is a chair according to the present invention and showing a use situation in the seat chair form. One embodiment of the seat chair used as the chair which concerns on this invention is shown, Comprising: It is a left view which shows the different use condition in a seat chair form. It is a left view which shows different embodiment of the seat chair used as the chair which concerns on this invention, Comprising: The use condition in a seat chair form is shown. 1 is a left side view showing an embodiment of a seat chair that is a chair according to the present invention and showing a use state in a chair form. 1 shows an embodiment of a seat chair that becomes a chair according to the present invention, and is a perspective view seen from the back side.

  1 to 3 show an embodiment of a seat 1 that is a chair according to the present invention. 1A and FIG. 2 in FIG. 1 show the appearance of the chair form, and FIG. 1B and FIG. 3 of FIG. 1 show the appearance of the chair form.

  A seat chair 1 according to the present invention has a base portion 2 having a seat surface 2s on the upper surface and a first backrest surface 3s on the front surface, and is a first standing on the base portion 1. The backrest portion 3 and the second backrest surface 4 s on the surface, and can be rotated with respect to the first backrest portion 3 by a pivotal portion (described later) provided on the first backrest portion 3. And a second backrest portion 4 to be attached. The second backrest portion 4 has a seat back position J along which the second backrest surface 4s extends along the first backrest surface 3s and the second backrest surface 4s with respect to the first backrest surface 3s. It is possible to rotate between the protruding seat position K. Further, a holding means for holding the second backrest portion 4 at the sitting position K is provided. In this example, as will be described later, a configuration is employed in which the pivotal support portion also serves as the holding means.

  The seat chair 1 which becomes the chair of this example is composed of an internal frame 10 shown in FIG. 4 and cushion materials C1 to C3 (see FIG. 1) covering the surface of the internal frame 10. FIG. 4 shows the inner frame 10 in the chair form. The inner frame 10 is manufactured by combining rigid members such as metal pipes such as iron and stainless steel, and constitutes a base frame 20 constituting the base portion 2 and a first backrest portion 3. The first backrest frame 30 provided with the pivot support 50 and the second backrest frame 40 that constitutes the second backrest 4 and is rotatably attached to the pivot support 50 are provided.

  The base frame 20 includes a rectangular frame portion 21 and a reinforcing portion 22 disposed in the frame portion 21.

The first back frame 30 includes a leg portion 31 fixed to the frame portion 21 and the reinforcement portion 22, a column portion 32 connected to the leg portion 31 at a right angle, and a pivot portion 34 at the upper end of the column portion 32. And an upper bent portion 33 provided. Further, reinforcing members 35, 36, and 37 are provided at appropriate positions. The column portion 32 is erected so as to be slightly inclined with respect to the base frame 20. The angle α on the front side formed by the base frame 20 and the column part 32 is preferably set to about 100 degrees. A pivot portion 50 to which the second backrest frame 40 is attached is provided at an appropriate position below the rotating portion 34 in the column portion 32. The upper bent portion 33 can be rotated from an initial position M that continues along the longitudinal direction of the column portion 32 to a bent position N that is bent about 90 degrees to the front side with the rotating portion 34 as a rotation axis. It is. The rotating unit 34 may include a lock mechanism that fixes the upper bent portion 33 at each of the initial position M and the bent position N.

The reclining gear used for the conventionally known seat chair can be used for the pivot part 50. This type of reclining gear connects the metal pipes, and the user applies a force in the rotation direction to one of the metal pipes, so that the rotation position for each predetermined angular pitch (for example, 16 degrees) is provided. It has a multi-stage lock function (for example, six stages) for rotating the metal pipe up to and holding the metal pipe at the rotation position. With this function, the crossing angle between the connected metal pipes can be changed in multiple stages (for example, 6 stages). Further, when the crossing angle between the metal pipes exceeds a predetermined angle, the lock function is released, and the crossing angle between the metal pipes can be returned to the initial state. As described above, in this example, the reclining gear is applied to the pivotal support part 50 so that the pivotal support part 50 also has a function of holding means for holding the second backrest part 4 at the sitting position K.

The reclining gear used in the present invention preferably satisfies the following conditions.
1) When the second backrest 4 is rotated to the seating position K to make a chair, the angle at which the second backrest 4s serving as the seat is held is easily understood.
2) The release position when releasing the inclined state of the second backrest surface 4s is easy to understand. For example, by setting the rotation angle at the time of release larger (for example, 27 degrees) than the rotation angle (for example, 16 degrees) when changing the tilt angle stepwise, the rotation angle width at the time of release is set. Make it wide and make the release position easy to understand.
3) It has a load-bearing strength that can support the load when the user sits on the second backrest portion 4 at the seating position K.
In this example, “KDS-6 1.6 stopper” (diameter 19.1 mm, T-1.6 mm, 240 Nm) manufactured by Koyo Giken Co., Ltd. was used for the pivotal support 50 as a product that meets these conditions. This gear product has the largest load bearing capacity in Japan and has high safety. If the reclining gear is used, the load resistance strength of about 300 kg can be held in the second backrest portion 4 at the sitting position K in the static load test.

  The second back frame 40 includes a U-shaped rotation frame portion 41 having a base end connected to the pivot portion 50 and an armrest frame portion 42 fixed to the rotation frame portion 41. As described above, the second backrest frame 40 has the seat position J in which the rotation frame portion 41 is substantially parallel to the column portion 32 of the first backrest frame 30 by the multi-stage lock function of the pivot support portion 50. To the seating position K where the rotation frame portion 41 protrudes from the column portion 32, it is possible to stop at a midway position where the rotation angle is changed every predetermined angle pitch (for example, 16 degrees). is there. Therefore, the inclination angle of the second backrest frame 40 with respect to the first backrest frame 30 can be adjusted. In addition, it is preferable to set the angle β of the rotation frame portion 41 with respect to the base portion 20 when the second backrest frame 40 is at the sitting position K to 4 to 6 degrees. By setting the angle β in this range, the seat surface (second backrest surface 4s) can be kept substantially horizontal when the user sits on the second backrest portion 4 in the sitting position K. it can.

  In order to ensure the required strength, the inner frame 10 is configured with double pipes at essential points such as the leg portion 31 of the first backrest frame 30, the reinforcing member 35, and the rotating frame portion 41 of the second backrest frame 40. May be.

  By covering the surface of the internal frame 10 configured as described above with a cushioning material, the seat 1 that becomes the chair of the present embodiment can be manufactured. As the cushion material, it is desirable to use a cushion material having flexibility and elasticity such as a sponge mat made of foamed polyurethane or the like and having a relatively large thickness. It is more desirable to cover the surface of the cushion material with a cover material made of a material having a good touch such as cloth, non-woven fabric, leather, or artificial leather. Further, the cover material and the cushion material may be integrated. In this case, as shown in FIG. 7, an opening G that can be opened and closed with a fastener or the like is provided in the cover material and the cushion material on the back side of the seat 1 to be a chair, and the inner frame 10 is inward from the opening G. Can be stored.

As shown in FIG. 1, the cushion material includes a seat cushion material C <b> 1 that covers the base frame 20, a first back cushion material C <b> 2 that covers the first back frame 30, and a second back frame 40 that covers the second back frame 40. 2 backrest cushion material C3. The seat cushion material C1, the first backrest cushion material C2, and the second backrest cushion material C3 may be integrally connected.

  The seat cushion material C1 includes a portion that covers the base frame 20 that constitutes the main portion 2a of the base portion 2, and an extension portion 2b that is provided so as to protrude to the front side of the main portion 2a. The extension portion 2b can be bent toward the seating surface 2s of the main portion 2a along the boundary portion 2c between the extension portion 2b and the main portion 2a. As shown in FIG. 1B, the extension 2b has a bottom surface exposed to the upper surface side when it is bent and is easily contaminated. Therefore, the entire or part of the exposed bottom surface 2d of the extension 2b is made of vinyl chloride. It may be covered with a material that does not easily adhere to dirt. Moreover, about the back protrusion part 2e which protrudes back from the 1st backrest part 3 among the main parts 2a, you may make thickness of a cushion material thin.

  The first backrest cushion material C2 has a portion that covers the column portion 32 of the first backrest frame 30 that constitutes the trunk portion 3a, and a portion that covers the upward bent portion 33 that constitutes the head portion 3b. About the cushion material which covers the trunk | drum 3a, the recessed part 3d is formed in the area | region near the base part 2 of the front side, and the seating comfort at the time of using it as a seat chair is improved. Since the upper bent portion 33 of the first back frame 30 can be bent to the front side at the rotating portion 34, the first back cushion material C2 can also be bent at the bending position 3c defined by the rotating portion 34. It is.

The second back cushion material C3 includes a portion covering the rotating frame portion 41 of the second back frame 40 constituting the rotating back portion 4a having the second back surface 4s and an armrest constituting the armrest portion 4b. And a portion covering the frame portion 42. Since the armrest portion 4b is a portion that is often touched directly by the user, the entire armrest portion 4b or a part 4c thereof may be covered with a material such as vinyl chloride that hardly adheres to dirt.

  The external dimensions of the sitting chair 1 to be the chair according to the present invention are designed so that it can be used comfortably as both a sitting chair and a chair. An example of each dimension shown in FIGS. 2 and 3 is given below. In addition, the following numerical value is an illustration and can be suitably changed according to the implementation situation.

Overall height H1: 840mm
Base part 2 width W1: 550 mm
Base part 2 depth D1: 850 mm
Depth S1 of the seat surface of the base unit 2: 510 mm
Base part 2 height T1: 120 mm
Thickness T2 of the rear protrusion 2e of the base part 2: 40 mm
Length D2 of the rear projecting portion of the base unit 2: 70 mm
First backrest 3 height H2: 680 mm
Height of the backrest when the first backrest 3 is in the chair form H3: 440 mm
Width W2 of the first back portion 3: 400 mm
First backrest 3 thickness T3: 70 mm
Width W3 = W2 of second backrest 4
Width W4 of second backrest surface 4s of second backrest portion 4: 380 mm
Width W5: 560 mm including armrest 4b of second backrest 4
Depth S2 of second backrest 4: 330 mm
Second backrest 4 thickness T4: 80 mm
The height H5 of the second backrest surface 4s at the time of the chair form of the second backrest portion 4: 440 mm
Depth L of armrest 4b: 310mm
Armrest 4b height H4: 250mm
Armrest 4b thickness T5: 70mm
Depth D3 when the extended part 2b of the base part 2 is bent: 600 mm
Height H6: 560 mm when the head 3b of the first backrest 3 is bent

Next, the usage mode of the seat 1 which becomes the chair of this embodiment is demonstrated with reference to FIG. 5A-FIG. 5D and FIG. 6A-FIG. 6D. When the seat chair 1 to be a chair is used as a seat chair, as shown in FIG. 6A, the second backrest surface 4 s of the second backrest portion 4 is replaced with the first backrest portion 3 of the first backrest portion 3. It is set as the seat chair form arrange | positioned in the seat chair position J along 3s of backrest surfaces. When the seat 1 that is the chair of this example is in the form of a seat, the seat surface 2s of the base portion 2 is wide, and the height of the first back surface 3s of the first back portion 3 is high. Since it is high, it is excellent in stability at the time of sitting, comfortable to sit on, and can give the user P relaxation.

  The second backrest portion 4 is rotatably supported by a pivot portion 50 that also serves as a holding means, and can be held at a position inclined with respect to the first backrest portion 3. Therefore, as shown in FIG. 5A, as shown in FIG. 6B, the user P holds the lower end side of the second backrest portion 4 at the seat position J and rotates it by a predetermined angle. In addition, the posture of the second backrest portion 4 can be changed to a posture inclined with respect to the first backrest portion 3. Therefore, the second backrest surface 4s adjusted to an angle different from the inclination angle of the first backrest surface 3s can be used according to the preference of the user P, so that comfort can be improved.

Furthermore, by rotating the second backrest portion 4 to the position of FIG. 6C and stopping it, the second backrest surface 4s is held in a posture that is largely inclined with respect to the first backrest surface 3s, A usage mode is also conceivable in which the user can use the second backrest portion 4 to perform a stretching exercise to stretch the back muscles.

When the seat 1 that is the chair of this example is used as a chair, as shown in FIG. 5B, the second backrest 4 protrudes from the first backrest 3 s with the pivot 50 as the center. It is made a chair form by rotating to the sitting position K. The second backrest portion 4 is held at the sitting position K by the function of a holding means such as a reclining gear provided on the pivot portion 50. As shown in FIG. 6D, the user P can sit on the second backrest surface 4s of the second backrest portion 4 held at the seating position K as a seating surface. Therefore, the seat chair 1 that becomes the chair of this example can function as a dining chair when eating at the dining table 60 or the like. Further, if necessary, the foot of the user P sitting on the second backrest portion 4 can be widened by bending the extension portion 2b of the base portion 2 toward the main portion 3a.

Thus, since the head 3b of the 1st backrest part 3 functions as a backrest, the seat chair 1 used as the chair of this example can provide the stable seating comfort. Moreover, since the seat chair 1 which becomes the chair of this example is a structure which covers the surface of the internal frame 10 with a cushioning material, when using it with a chair form, the comfort such as flexibility and elasticity by the cushioning material is provided. You can enjoy it.

  As shown in FIG. 5C and FIG. 5D, the seat chair 1 that is the chair of the present example can be reduced in depth by folding the extension portion 2 b of the base portion 2, and the first backrest. By bending the head 3b of the part 3, the height dimension can be reduced. In this example, the distal end of the base portion 2 in a state where the extension portion 2b is bent is set so as to be positioned at substantially the same front position as the distal end of the second backrest portion 4 at the sitting position K. The upper end of the first backrest portion 3 in a state where the head portion 3b is bent is set so as not to exceed the upper end position of the armrest portion 4b of the second backrest portion 4. With such a configuration, as shown in FIG. 5D, if the extension portion 2b and the head portion 3b are bent, the size can be reduced, so that the volume at the time of packing is reduced and transportation and transportation can be facilitated. It is.

  Furthermore, the seat chair 1 which becomes the chair of the present embodiment has a double pipe structure in which the leg portion 31 and the column portion 32 (see FIG. 4A), which are structural members important in strength, are moved to the position of the rotating portion 34. This ensures a strength greater than that obtained with conventional pipes. By adopting this configuration, in the present embodiment, the number of steel materials for maintaining strength is reduced and weight reduction is achieved (main body weight 9.6 kg), so that it is transported when moving between rooms. Provides the advantage of being easy.

[Other Embodiments]
The seat chair to be the chair according to the present invention is not limited to the above-described embodiment. For example, the armrest 4b may be omitted. The second backrest portion 4 can change the rotation angle in a stepwise manner, but may be configured so that only two positions of the seat position J and the sitting position K can be selected. The extension part 2b of the base part 2 does not necessarily need to be bendable. In addition, various changes can be made according to the implementation situation.

DESCRIPTION OF SYMBOLS 1 Seat chair which becomes a chair 2 Base part 2a Main part 2b Extension part 2s Seat surface 3 1st backrest part 3a Trunk part 3b Head 3s 1st backrest surface 4 2nd backrest part 4a Rotation Backrest portion 4b Armrest portion 4s Second backrest surface 10 Internal frame 20 Base frame 30 First backrest frame 40 Second backrest frame 50 Pivot (holding means)
J Seat position K Seat position value P User

Claims (4)

A base portion having a seating surface on the upper surface;
A first backrest portion that has a first backrest surface in front and is erected on the base;
A second backrest portion having a second backrest surface on the surface and pivotally attached to the first backrest portion by a pivotal portion provided on the first backrest portion; The second backrest surface is pivotable between a seat position along the first backrest surface and a seating position where the second backrest surface projects from the first backrest surface. The backrest of
And a holding means for holding the second backrest portion in the sitting position. The base portion includes a base frame having rigidity, and a seat cushion material having flexibility to cover the surface of the base frame,
The first backrest portion has a rigid first backrest frame provided with a pivotal support portion that rotatably supports the second backrest portion, and a flexibility that covers a surface of the first backrest frame. A first backrest cushioning material having
The second backrest portion includes a rigid second backrest frame that is rotatably attached to the pivot support portion, and a second backrest cushion material that has flexibility to cover the surface of the second backrest frame. Prepared,
The pivot portion also serves as the holding means, and the second backrest portion is stopped at a predetermined mid-rotation position between the seat position and the sitting position. The seat chair which becomes a chair of Claim 1 which is possible.   The seat cushion material has a main portion that covers the base frame, and an extension portion that is provided to project to the front side of the main portion, and the extension portion extends along a boundary portion with the main portion. The seat chair which becomes a chair of Claim 1 or 2 which can be bent.   The first backrest portion may be bent to a front side at a predetermined bending position above the pivot support portion, and a portion above the bending position may be bent to the front side. A seated chair that becomes the listed chair.

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