JP3811597B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair having a locking function.
[0002]
[Prior art]
A rocking chair whose backrest leans backward due to the leaning of a person is attached to a seat receiving member provided on the upper end of the leg so that the swinging frame can be tilted backwards, and the rear tilting of the swinging frame is supported by a spring, and the swinging chair In many cases, the backrest is screwed to the moving frame.
[0003]
[Problems to be solved by the invention]
By the way, it is widely practiced that the seat body and the backrest are made into a shell structure with a synthetic resin, and the backrest is attached to a shell-like backrest member that wraps a person's waist or the backrest is attached to the lower end of the backrest. When the members are integrally molded, the sitting comfort can be improved and the design can be improved.
[0004]
An object of the present invention is to enable easy attachment to a swing frame when a shell-shaped back support member is provided as described above.
[0005]
[Means for Solving the Problems]
The chair according to the invention of claim 1 is a seat, a seat support for supporting the seat, a swing frame attached to the seat support so as to tilt backward against elastic means, and the swing A back support member with a shell structure that is concavely attached to the frame when viewed from the front, and the back support member is fitted to the swing frame so that the back support member cannot be displaced in the left-right direction. And a first fastening part and a second fastening part that overlap the swing frame from above and below, and the first fastening part and the second fastening part have different heights from each other. The first fastening portion and the second fastening portion are fixed to the swing frame with screws.
[0006]
Chair according to claim 2, in which the more specific the claim 1, whereas in this chair, the upper surface of the swing frame receiving plate of wings extending in the left right direction is provided integrally, the back receiving member is formed in an upward concave shape in a front view so as to fit the from below throughout the KiYurado previous frame made of synthetic resin.
[0007]
The back support member is manufactured by an injection molding apparatus or a reaction molding apparatus provided with a first mold that can overlap the back support member from the front and a second mold that can overlap from the back, and the back support member. the inner surface, and a restricting portion to be fitted from the rear to the swing frame, a first fastening portion overlapping the left and right end portions of the receiving plate in the swing frame, the center side portion of the receiving plate in the oscillating frame a second fastening portion overlapping is formed so as to extend in the front-rear direction.
[0008]
[Operation and effect of the invention]
According to the present invention, since the back support member is positioned by the restricting portion, it can be easily and accurately fixed to the swing frame. Therefore, the mounting operation can be performed efficiently.
[0009]
According to the second aspect of the present invention, since the back support member is fastened to the left and right longitudinal support plates provided on the swing frame, it is possible to increase the screw mounting interval, thereby improving the fastening strength. Can do.
[0010]
Further, when to thus produce a back receiving member in an injection molding apparatus or reaction molding equipment, since extending in the movement direction of the mold (die-cutting direction) and the fastening portion and the regulating portion, a pair of molds for contact to and separate from only provides, it is possible to form the fastening portion and the restricting portion without impairing the ease of demolding can be suppressed cost becomes simple structure of forming shaped device.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 is a right side view, FIG. 2A is a front view, FIG. 3 is a plan view, FIG. 4 is a longitudinal right side view, FIGS. 5 and 6 are separated perspective views, and FIG. 8 is a plan view in the attached state, FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7, and FIG. 9 is a sectional view taken along the line IX-IX in FIG.
[0012]
(1). Basic structure chair, the leg 2 having a leg support post 1 such as a gas cylinder, an upward opening of the seat receiving (base) 3 fixed to the upper end of the leg support post 2, covers from above the seat receiving 3 An intermediate support 4, a swing frame 5 disposed behind the intermediate support 4, a seat body 6 supported by the intermediate support 4 and the swing frame 5, and a back portion 7 attached to the swing frame 5. I have. The leg support 1 is covered with a leg cover 8, and the seat support 3 is covered with a base cover 9 from below.
[0013]
A first receiving plate 10 is fixed to the bottom surface of the seat receiver 3, and an upper end of the leg support 1 is fitted to a bush 11 fixed to the first receiving plate 10 and the seat receiver 3. Further, a longitudinally long slot 12 is formed in the front part of the left and right side plates 3 a in the seat receiver 3, and a first shaft 13 is inserted into the slot 12 and the side plate 4 a of the intermediate support 4.
[0014]
On the lower surface of the seat receiver 3, a U-shaped second receiving plate 14 facing downward is fixed by welding or the like, while the swing frame 5 includes a side plate 5a positioned outside the second receiving plate 14. The front end portion of the swing frame 5 is attached to the second receiving plate 14 by the second shaft 15 so as to be tiltable rearward. Further, the swing frame 5 and the intermediate support 4 are connected by a third shaft 16.
[0015]
As shown in FIG. 4, a downward rod 17 penetrating the swing frame 5 is attached to the rear portion of the seat receiver 3 so that it cannot be removed, and a spring receiver 18 provided at the tip of the rod 17 is used as an elastic means. A coil spring (not shown) as an example is supported, and the swing frame 5 is received by the coil spring. The coil spring is fitted in the holder 19.
[0016]
(2) The. Spine receiving the rear portion of the mounting structure oscillating frame 5 members, and fixing a receiving plate 20 extending in the lateral direction, in the receiving plate 20 is the rear portion of the seat member 6 is supported. The receiving plate 20 has a wing shape in which the left and right end portions 20a are high in height, and the rear portion of the seat body 6 is fitted into a recess opened upward.
[0017]
A support post (not shown) of an armrest device is fixed to the outer surface of the inclined portion of the receiving plate 20 with a screw.
[0018]
The seat body 6 is also attached to the intermediate support body 4, and details are not shown in the figure, but the seat body 6 is located between the rear end portion of the intermediate support body 4 and the front end portion of the swing frame 5. It is comprised so that it may bend in side view. And if the rocking | fluctuation frame 5 and the back part 7 incline back against a coil spring, the seat body 6 will be tilted back, retreating, bending | flexing in the location near the rear part.
[0019]
As shown in FIGS. 1 and 2, the back portion 7 includes a back support member (waist outer member) 21 attached to the swing frame 5 and a backrest 22 attached to the back support member 21. The back support member 21 is manufactured by an injection molding method using a resin that is easy to recycle and inexpensive, such as polypropylene.
[0020]
For example, as shown in FIG. 3 and FIG. 6, the back support member 21 is formed in a shell shape that is concave forward in a plan view by integrally connecting left and right side frame portions (side plate portions) 21a. A hole 23 is formed in the side frame portion 21a so that the back of a human hand can enter. The front surface of the side frame portion 21a is formed so as to tilt backward in a side view.
[0021]
A fitting portion 21 b surrounding the swing frame 5 is integrally provided at the lower end of the back support member 21. The fitting portion 21b is formed with a recess 24 with a forward opening in which the leg cover 8 is fitted and a relief hole 25 in which the holder 19 of the coil spring is fitted.
[0022]
The back receiving member 21 includes a pair of left and right plate-like first fastening portions 26 that overlap the both end portions 20a of the receiving plate 20 in the swing frame 5 from above, and a portion of the bottom portion of the receiving plate 20 that is slightly removed from the center portion. A pair of left and right plate-like second fastening portions 27 that overlap with each other, an inner restricting portion 28 that fits between the left and right side plates 5a of the swing frame 5 so as not to be laterally displaceable from the rear, and an outer surface that is in close contact with the outer surface of the left and right side plates 5a The restricting portion 29 is integrally formed.
[0023]
The inner restricting portion 28 has a sturdy structure with vertical and horizontal ribs, and the inner restricting portion 28 is in contact with the rear end of the swing frame 5 from above as shown in FIG. For this reason, the load when the person leans against the backrest 22 can be supported by the swing frame 5 via the inner restricting portion 28, and as a result, the mounting strength can be further improved. In addition, you may form the control part 28 in the state isolate | separated into right and left.
[0024]
Both fastening portions 26 and 27 of the back receiving member 21 are fixed to the receiving plate 20 of the swing frame 5 with screws 30. Note that only one of the inner restricting portion 28 and the outer restricting portion 29 is sufficient.
[0025]
(3). As shown the mounting structure for example Figure 6 of the backrest, the front surface of the back support member 21, a first locking claw 31 of the left and right as viewed from the side upward hook shape, pair in plan view hooked The second locking claws 32 and the ribs 33 extending vertically and horizontally are formed in a state of being vertically separated.
[0026]
On the other hand, as shown in FIG. 4, the backrest 22 of the back portion 7 is composed of an outer shell (cover) 34, an inner shell (core plate) 35 positioned inside thereof, and a cushion 36 stretched on the inner shell (cover). 35, the first engagement claw 37 having a hook shape facing downward from the side and fitted to the first engagement claw 30 of the back support member 21 from above, and the second engagement claw 32 of the back support member 21 are elastically resistant. A second engagement claw 38 having a bowl-like shape in plan view that is engaged by this deformation is formed.
[0027]
Therefore, after the first engaging claw 37 is fitted to the first locking claw 31, the second engaging claw 38 is elastically deformed and forcedly engaged with the first engaging claw 32, so that the backrest 22 is moved to the back. It can be attached to the receiving member 21 so as not to be detached. As shown in FIG. 1, on the back surface of the back support member 21, a groove-like line 39 that is continuous with the left and right side surfaces of the outer shell 34 in the backrest 22 is formed. Of course, the line 39 may be omitted.
[0028]
As shown in FIGS. 4 and 10, the inner shell 35 of the backrest 22 extends below the outer shell 34. At the lower end of the outer shell 34, a step portion 34 a that fits into the upper end of the back support member 21 is formed.
[0029]
In the above configuration, when attaching the back support member 21 to the swing frame 5, the side plate 5 a of the swing frame 5 is inserted into the gap between the restricting portions 28 and 29, and then the fastening portions 26, 27 may be fixed to the receiving plate 20.
[0030]
For this reason, the back support member 21 can be easily fixed to an accurate posture. Further, since the back receiving member 21 is fixed to the end portion 20a of the receiving plate 20 spreading like a wing, the fastening strength is high.
[0031]
The back support member 21 is manufactured by an injection molding method using two molds, a mold that overlaps from the front of the back support member 21 and a mold that overlaps from the back of the back support member 21. And since each fastening part 26 and 27 and the control parts 28 and 29 are extended in the front-back direction, these fastening parts 26 and 27 and the control parts 28 and 29 are shape | molded, without using another slide type | mold. Can do.
[0032]
(4). As roughly shown in related engagement Figure 2 (B) between the seat body and the back receiving member, the seat member 6 is a pitched cushion 6b synthetic resin of the inner shell (core plate) 6a structure The left and right sides are surrounded by a seat outer shell (cover) 6 '.
[0033]
As shown in FIG. 1, the seat outer shell 6 ′ is exposed to the outside, and the rear end thereof overlaps the front end surface of the side frame portion 21 a of the back support member 21. Then, as shown in FIG. 2C, which is a sectional view taken along the line IIC-IIC in FIG. 2, a step portion 6a in which the front end of the side frame portion 21a of the back support member 21 is fitted to the rear end of the seat outer shell 6 ′. By forming ′, the two are kept in the same plane.
[0034]
Therefore, the appearance is good. Further, it is possible to prevent the inside from being seen when the back support member 21 is tilted backward, and the aesthetics can be improved in this respect. The step portion may be formed on the back support member 6.
[0035]
(5). Its In other <br/> above embodiments constitutes the back receiving member to back a separate body, the back receiving member back and integrally formed, directly or inner cushion material on the front surface You may attach through a shell.
[Brief description of the drawings]
FIG. 1 is a right side view of a first embodiment.
2A is a front view of a chair, FIG. 2B is a partial cross-sectional view of a seat body, and FIG. 2C is a partial cross-sectional view taken along IIC-IIC in FIG.
FIG. 3 is a plan view.
FIG. 4 is a vertical right side view.
FIG. 5 is an exploded perspective view of a seat receiver, an intermediate member, and a swing frame.
FIG. 6 is an exploded perspective view of a swing frame and a back support member.
FIG. 7 is a separated plan view of a swing frame and a back support member.
FIG. 8 is a plan view of a state in which the back receiving member is fixed to the swing frame.
9 is a cross-sectional view taken along the line VIII-VIII in FIG. 7;
10 is a cross-sectional view taken along the line IX-IX in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 Seat receiver 5 Oscillating frame 6 Seat body 7 Back part 20 Back plate 21 Back support member 21a Side frame part 22 Backrest 26 1st fastening part
27 Second fastening portion 28, 29 Restricting portion 30 Screw

Claims (2)

A seat body, a seat support that supports the seat body, a swinging frame that is attached to the seat support so as to tilt backward against the elastic means, and a concave shell that is attached to the swinging frame and that faces upward. A back support member of the structure,
A restricting portion that holds the back support member in a laterally undisplaceable manner by fitting the back support member to the swing frame, and a first fastening portion and a second fastening portion that overlap the swing frame in the vertical direction. The first fastening portion and the second fastening portion have different heights and are each formed in a plate shape, and swing the first fastening portion and the second fastening portion. Fixed to the frame with screws,
Chair. While receiving plate of wings extending in the left right direction is provided integrally on the upper surface of the swing frame,
The back receiving member is formed in an upward concave shape in a front view so as to fit the from below throughout the front KiYurado frame made of a synthetic resin, the back receiving member, from the front to the back receiving member It is manufactured by an injection molding apparatus or a reaction molding apparatus provided with a first mold that can overlap and a second mold that can overlap from behind.
The inner surface of the back receiving member, and a regulating portion to be fitted from the rear to the swing frame, a first fastening portion overlapping the left and right end portions of the receiving plate in the swing frame, among the receiving plate in the oscillating frame The second fastening portion that overlaps the central portion is formed to extend in the front-rear direction,
The chair according to claim 1.

Images