JP3967076B2 - Rocking chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to B Kkingu chair and attach the armrest device.
[0002]
[Prior art / problems to be solved by the invention]
When an armrest device is provided on a rocking chair, it is roughly divided into a case where the armrest device is attached to the seat and a case where it is attached to the backrest .
[0003]
When attached to the seat as in the former, the armrest device has a structure in which an elbow rest is attached to the upper end of the elbow strut, and the elbow strut is generally screwed to the seat.
[0004]
And this type of armrest device has the advantage that it is excellent in strength because the load applied to the armrest acts on the elbow strut from the axial direction, but on the other hand, because the human arm extends when locking , Body fit may be lacking.
[0005]
On the other hand, in the latter type in which the armrest device is attached to the backrest, the rear portion of the horizontally extending elbow rest is often fixed to the side portion of the backrest by screwing or the like.
[0006]
In this latter type, the elbow rest moves together with the backrest, so there is an advantage that it can improve the fit when locking, but on the other hand, the load acts as a moment on the elbow rest, There was a problem of being weak. Another problem is that the structure of the backrest is complicated.
[0007]
This invention makes it a subject to improve such a present condition.
[0008]
[Means for Solving the Problems]
The present invention provides a support base fixed to the upper end of the "leg strut, loci sit person, seated occupant gets Tarekakari also back, rocking the said back is mounted for the rear tilt to the support base along with the attached A moving frame, a spring for supporting the backward tilting of the swinging frame, and an armrest device having an elbow post, and the seat swings with the support base so as to tilt backward while moving backward with the backrest. The chair is attached to the moving frame.
[0009]
And in this invention, the said rocking | fluctuation frame is provided with the blade | wing part extended on the right-and-left outer side of the said support base, The shell-shaped waist | hip | lumbar part which wraps the seated person's waist in the blade | wing part of this rocking | fluctuation frame with the outer member is fixed in a state of overlapping the lower, the one in which the female screw for fixing the armrest support is provided, on the mounting portion and the waist outer member provided at the lower end of the armrest support, the An insertion hole for a bolt that can be screwed into a female screw provided on the blade portion of the swing frame is provided, and the mounting portion of the elbow strut is fixed to the blade portion of the swing frame by the bolt via a waist outer member.
[0010]
In the invention of claim 2, in addition to claim 1, a synthetic resin spacer is interposed between the elbow strut mounting portion and the waist outer member, and the bolt penetrates into this space. Yes.
[0011]
[0012]
[0013]
[Operation and effect of the invention]
In the chair of the present invention, since the armrest device moves together with the backrest, it is possible to improve the fit when rocking.
[0014]
In addition, since the elbow strut of the armrest device is attached to the swing frame, it is possible to prevent or suppress the load applied to the elbow rest from acting as a moment on the elbow strut. The support strength of the armrest device can be improved while moving together.
[0015]
By the way, the armrest device is often a user option, and even if it is a chair of the same model, the armrest device is often attached or not attached. In addition, even if it is initially installed, the user may want to remove it later.
[0016]
In this respect, in the present invention, since the elbow strut is disposed outside the outer waist member, the armrest device can be easily attached and detached. Further, since the elbow strut and the waist outer member are integrally fixed to the swing frame, the attachment strength of the waist outer member can be improved.
[0017]
Furthermore, since the armrest support is attached to the blade portion of the swing frame, never armrest attachment portion enters deep in the center of the chair, Therefore, the load applied to the elbow is a moment armrest support action to suppress that can be a robust construction.
[0018]
Since the chair of the present invention has a synchronized structure in which the backrest and the seat move in conjunction with each other, so-called shirt turn-up (backshift) at the time of rocking can be prevented or suppressed.
[0019]
If comprised like Claim 2 , even if the outer surface of a waist outer member is smooth circular arc shape etc., an elbow support | pillar can be firmly fixed by matching a spacer with the outer surface shape of a waist outer member. In addition, when there are a plurality of types of chairs having different outer surface shapes of the waist outer member, the cost can be reduced because only the spacers need to be changed.
[0020]
In addition, when the spacer, the cover, and the elbow support are unitized as in the embodiment, there is an advantage that the spacer and the cover can be prevented from being lost during transportation and storage of the armrest device.
[0021]
By the way, when an external force acts on the cover, the external force generally acts downward in many cases. For this reason, the cover is easily removed downward. In this regard, when configured as in the embodiment , the cover cannot be removed downward, so that an accident that the cover is removed can be prevented.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0023]
[0024]
Figure 1 is a front view of the chair, FIG. 2 is a right side view of the chair, FIG. 3 is a longitudinal right side view, FIG. 4 is exploded perspective view, FIG. 5 is a cutaway perspective view of main members, firstly, in these figures Based on this, the basic structure of the chair will be described.
[0025]
(1). Basic structure The chair includes a leg 2 having a leg column 1 such as a gas cylinder, a support base 3 having an upward opening fixed to the upper end of the leg column 1, and an upper metal fitting 4 covering the support base 3 from above. a swing frame 5 provided behind the upper bracket 4, a seat 6 is supported by upper fitting 4 and the oscillating frame 5, the backrest 7 attached to the swing frame 5, a pair of left and right armrest device 8 I have.
[0026]
The leg support 1 is covered with a leg cover 1a, and the support base 3 is covered from below with a base cover 9 that opens upward.
[0027]
As shown in FIGS. 3 and 4, the first bracket 10 is fixed to the bottom surface of the support base 3, and the upper end of the leg column 1 is fitted to the bush 11 fixed to the first bracket 10 and the support base 3. I wear it. In addition, a longitudinal long hole 12 is formed in the front part of the left and right side plates of the support base 3, and a first pin 13 is inserted into the long hole 12 and the side plate of the upper metal fitting 4.
[0028]
On the lower surface of the support base 3, a second U-shaped second bracket 14 is fixed in a front view. On the other hand, the swing frame 5 has a configuration in which the second bracket 14 is sandwiched from the left and right outer sides, and the front end portion of the swing frame 5 is attached to the second bracket 14 with a left and right long second pin 15.
[0029]
Further, the swing frame 5 and the upper metal fitting 4 are connected by a third pin 16 that is long in the left-right direction. As shown in FIG. 4, the oscillating frame 5, claim and provided with a wing portion 17 extending in an inclined shape in a front view with spreads in the lateral direction, the right and left wing portions 17, as a fixed hand stage of the armrest device The female screw 17a described in 3 is formed in three places.
[0030]
A downward rod 18 penetrating the swing frame 5 is non-rotatably attached to the rear portion of the support base 3, and a coil spring 20 is supported by a spring receiver 19 provided at the tip of the rod 18. The swing frame 5 is received by the spring 20. The coil spring 20 is fitted in the holder 21.
[0031]
(2). Seat Structure As shown in FIG. 3, the seat 6 comprises a seat inner member 22 made of polypropylene synthetic resin and a cushion 24 stretched on the upper surface thereof. The front inner shell 22a and the rear inner shell 22b are divided. The cushion 24 is stuck on the front and rear inner shells 22a and 22b.
[0032]
A hook-like front catch 23 is provided at the front portion of the front inner shell 22a and is fitted into the front end edge of the upper metal fitting 4 from the front. Further, the front inner member 22 a is integrally provided with a slider portion 25 that is placed on the upper surface of the upper metal fitting 4.
[0033]
At the rear end of the rear inner shell 22b, a bowl-shaped rear catch 26 that is fitted to the rear end edge of the swing frame 5 is provided. Although omitted in the drawing, the front inner shell 22 a is also engaged with both ends of the third pin 16.
[0034]
When seated occupant is leaning on backrest 7, with oscillating frame 5 is a rear tilt as a fulcrum second pin 15 against the coil spring 20, the upper fitting 4 and the seat 6 are Ko傾receding. When the swing frame 5 is tilted backward to some extent, the backward movement and backward tilt of the upper metal fitting 4 are stopped, and only the seat 6 is moved backward.
[0035]
In order to allow relative movement between the front inner shell 22 a and the upper metal fitting 4, there is a gap between the front catch 24 and the front end surface of the upper metal fitting 4. As shown in Figure 1 and Figure 2, the front inner shell 22a, it is attached to the seat cover (outer shell for the seat) 27.
[0036]
(3). Backrest structure backrest 7 is provided with a waist outer member (back receiving member) 28 formed on the forward concave in plan view so as to enclose the waist of the person who is seated, is mounted on the front of the waist outer member 28 And an inner member 29 (see FIG. 3) for backrest. The backrest inner member 29 is stretched with a cushion.
[0037]
The lower half of the backrest inner member 29 is attached to the waist outer member 28, and a back cover (back outer member) 30 is attached to the back of the portion of the backrest inner member 29 exposed from the waist outer member 28. (See FIG. 2). Waist outer member 28 and backrest for an inner member 29 and the back cover 30, is manufactured from a synthetic resin such as polypropylene.
[0038]
As shown in FIG. 5, the lower portion 28 a of the waist outer member 28 has a bowl shape so as to surround the swing frame 5, and a hole 31 into which the holder 21 of the spring receiver is fitted is formed at the bottom.
[0039]
Further, the waist outer member 28 is formed with a curved step portion 28b that overlaps the rear portion of the seat 6 in plan view, and is large enough to allow a person to insert a palm above the curved step portion 28b. Window hole 33 is vacant.
[0040]
Further, a first rib 34 that extends horizontally is formed integrally on the front surface of the waist outer member 28 slightly above the curved step portion 28b, and the upper edge of the blade portion 17a in the swing frame 5 is formed integrally. It fixes to the 1st rib 34 with the screw (not shown). For this reason, as shown in FIG. 5, the first rib 34 has a screw insertion hole 34a.
[0041]
Further, as shown in FIG. 5, a horizontal second rib 35 is provided below the first rib 34, and the swing frame 5 is fastened to the second rib 35 with a screw. A screw insertion hole 36 is also formed in the lower rib 35.
[0042]
Further, the right and left curved step portion 28b of the waist outer member 28, Rutotomoni form a third rib group 3 7 for reinforcement, for attaching the armrest device 7, provided in the wing portions 17 of the oscillating frame 5 A bolt insertion hole 42 corresponding to the female screw hole 17a is vacant.
[0043]
Further, a plurality of reinforcing fourth rib groups 38 and a plurality of hook-shaped catches 39 for attaching the back inner member 29 are provided on the upper portion of the waist outer member 28. Further, a fifth rib 40 for positioning the swing frame 5 is formed at the lower end of the waist outer member 28.
[0044]
As shown in FIG. 3, an auxiliary catch 41 that engages with the first rib 34 from below is formed at the rear end of the rear inner shell 22 b in the seat 6.
[0045]
(4). Outline of Armrest Device Next, the armrest device 8 will be described with reference to FIGS. 6 to 16 in addition to FIGS. 1 and 2. FIG. 6 is a perspective view, and FIG. 7 is a separation view seen from an oblique direction.
[0046]
As shown in FIGS. 1 and 2, the armrest device 8 is attached to an elbow support 43 made of a metal pipe, a lower mechanism portion 44 attached thereto, and a height adjustable and vertically swingable to the lower mechanism portion 44. An elbow rest 45 is provided.
[0047]
(5). Mounting portion As shown in FIGS. 6 and 7, the lower end portion of the elbow support 43 is bent obliquely inward, and a mounting plate 46 is welded thereto, and this mounting plate 46 is used as a main member. As shown in FIG. Further, the armrest device 8 includes a synthetic resin spacer 48 that overlaps the curved step portion 28 b of the waist outer member 28, and a cover 49 that covers the attachment portion 47.
[0048]
The mounting portion 47 is also shown in FIGS. FIG. 8 is a plan view of the mounting portion 47, and FIG. 8 is a bottom view of the mounting portion 47. The mounting plate 46 has three bolt insertion holes 50 corresponding to the female screw holes 17 a of the swing frame 4.
[0049]
In this case, since the inclination of the blade portion 17 of the swing frame 5 and the curved step portion 28b of the waist outer member 28 are different, the bolt insertion hole 50 of the attachment plate 50 is inclined. Further, in order to prevent interference with the bolt insertion hole 50, the tip portion 43a of the elbow support 43 is crushed and formed.
[0050]
(6) Spacer Details of the spacer 48 are shown in FIG. 10A is a plan view, FIG. 10B is a sectional view taken along the line BB of FIG. 10A, and FIG. 10C is a perspective view in an inverted state.
[0051]
As shown in FIGS. 10, 6, and 7, the spacer 48 is formed with a large number of ribs, and the upper surface thereof is formed in an upwardly concave shape so as to be in close contact with the curved step portion 28 b of the waist outer member 28. ing. Moreover, the three bolt insertion holes 51 are vacant.
[0052]
An outward projecting portion 52 into which the elbow support 43 is fitted is formed in a portion of the spacer 48 facing the outside of the chair. Engaging grooves 53 are formed on the front and rear side surfaces of the outward projecting portion 52 so as to open to the outside with the elbow support 43 interposed therebetween.
[0053]
Furthermore, a downward hook-like engagement claw 54 is formed in a portion of the spacer 48 opposite to the outward projecting portion 52 across the center. Further, on the front and rear side surfaces of the spacer 48, a downward flange 55 and a pair of engagement step portions 56 located on both sides of the downward flange 55 are formed.
[0054]
(7). Cover The cover 49 is shown in detail in FIG. 11, (A) is a plan view, (B) is a longitudinal front view of (A), and (C) is a right side view of (A).
[0055]
The cover 49 is formed so as to completely cover the mounting portion 47 and the spacer 48, and an U-shaped groove 57 having an upward opening for preventing interference with the elbow support 43 is formed at one end thereof. .
[0056]
An inward lip 57 a that fits in the outward engagement groove 53 of the spacer 48 is formed at both front and rear edges of the U-shaped groove 57.
[0057]
In addition, a cylindrical portion 59 having a diameter slightly larger than the outer diameter of the head of the bolt 58 is integrally provided inside the cover 49. Further, first ribs 60 extending in parallel with the elbow struts 43 are formed in the front and rear sides of the inside of the cover 49, and the first rib 60 is fitted into the downward flange portion 55 of the spacer 48 from below. The engaging portion 61 is formed in a stepped state, and a horizontal piece 62 that can overlap the stepped portion 56 of the spacer 48 from above is provided inwardly.
[0058]
Further, a second rib 63 that engages with the engaging claw 54 of the spacer 48 is formed in a portion of the cover 49 opposite to the U-shaped groove 57 across the center.
[0059]
(8). Assembly State In FIG. 12, the relationship between the elbow support 43, the spacer 48, and the cover 49 is shown in plan view, and as shown in this figure, the lower portion of the elbow support 43 extends obliquely in plan view. ing. Then, as shown in FIG. 13, the bolt 58 inserted from the tube portion 59 of the cover 49 is screwed into the blade portion 17 of the swing frame 5 via the mounting plate 46, the spacer 48, and the waist outer member 28, thereby A device 8 is attached.
[0060]
As can be understood from FIG. 10 (C), the mounting plate 46 fits dust cut in the recess 48a of the rear surface of the spacer 48, are lateral non retained.
[0061]
14 to 16, the horizontal piece 62 of the cover 49 overlaps the stepped portion 56 of the spacer 48, so that the downward movement of the cover 49 is prevented, and the engaging portion 61 of the cover 49 is moved to the spacer 48. The upward movement and the back-and-forth movement of the cover 49 are prevented by being fitted to the downward flange portion 55 from below.
[0062]
Further, since the inward lip 57 a of the cover 49 is fitted in the engagement groove 53 of the spacer 48, the cover 49 is held so as not to be able to be removed outward, and further, the second rib 63 of the cover 49 is fixed to the spacer 48. By engaging with the engaging claw 54 from below, the inward movement of the cover 49 is prevented.
[0063]
First, the spacer 48 is fitted into the mounting plate 46, and then the cover 49 is overlaid on the spacer 48 in a state of being slightly displaced to the left in FIG. Then, when the cover 49 is shifted to the right in FIG. 13, the engaging claw 54 of the spacer 48 is engaged with the second rib 63 of the cover 49 by its elastic deformation, so that the spacer 48 and the cover 49 can be easily connected. It is fixed to the mounting plate 46 in a state where it does not come off.
[0064]
Thus, since the spacer 48, the cover 49, and the elbow support 43 are unitized so that they are not easily separated, the spacer 48 and the cover 49 can be prevented from being lost when the armrest device 8 is transported or stored. Further, since the bolt 58 penetrates the cover 49, it is not necessary to remove the cover 49 at the time of installation, so that the labor of the installation work can be reduced.
[0065]
When the cover 49 is removed with the armrest device 8 attached to the chair, the cover 49 may be pushed toward the inside of the chair while being squeezed downward. Then, the engaging claw 54 of the spacer 48 is elastically deformed and detached from the second rib 63 of the cover 49, and the overlap between the horizontal piece 62 and the step portion 56 is also released, so that the cover 49 can be removed.
[0066]
A gap is formed between the tube portion 49 of the cover 49 and the bolt 58 so as to allow a slide for removing the cover 49.
[0067]
(9). Seat Safety Device FIG . 17 is a separated view of the seat inner member 22, and FIG . 18 is a cross-sectional view showing the relationship between the stopper of the front inner member and the intermediate metal fitting. The front and rear inner members 22a and 22b are connected by fitting downward claws 65 and receiving portions 66 provided at the left and right ends (see also FIG. 3).
[0068]
However, if any one of the downward claw 65 and the receiving portion 66 breaks, the front inner member 22a may slide forward and the cushion may be damaged or broken.
[0069]
Therefore, as shown in FIGS. 18 and 19, a stopper 67 capable of contacting the rear end edge of the intermediate metal fitting 4 is provided at the rear end edge of the front inner member 22a, and the front inner member 22a moves forward. The unexpected situation is prevented.
[0070]
[0071]
(10) . Others The present invention can be embodied in various ways other than the above. For example, the armrest device is not necessarily limited to one in which the elbow rest moves up and down or rotates, but may be a fixed one. The elbow strut may be made of synthetic resin.
[0072]
It is also possible to attach the cover to the attachment part. When attaching to the spacer, in addition to the engagement claw or horizontal piece as in the first embodiment, the cover is overlaid on the spacer. Various engaging means such as a claw system that engages with each other can be adopted.
[Brief description of the drawings]
1 is a front view of the chair according to the implementation embodiments.
FIG. 2 is a right side view of the chair.
FIG. 3 is a vertical right side view.
FIG. 4 is an exploded perspective view.
FIG. 5 is a cutaway perspective view of a waist outer member.
FIG. 6 is a perspective view of an armrest device.
FIG. 7 is an isolated view of the armrest device.
FIG. 8 is a plan view of an attachment portion.
FIG. 9 is a bottom view of the mounting portion.
FIG. 10 is an explanatory diagram of a spacer.
FIG. 11 is an explanatory diagram of a cover 49.
FIG. 12 is a diagram illustrating an attachment state of the armrest device.
13 is a cross-sectional view taken along line XIII-XIII in FIG.
14 is a cross-sectional view taken along line XIV-XIV in FIG.
15A is a partial cross-sectional view taken along line XV-XV in FIG. 12, and FIG. 15B is a plan view of FIG.
FIG. 16 is a plan view showing the relationship between the engagement groove of the spacer and the inward flange of the cover.
FIG. 17 is a separated plan view of the seat inner member.
FIG. 18 is a cross-sectional view showing the relationship between the stopper of the front inner member and the intermediate fitting.
FIG. 19 is a perspective view of a front inner member.
[Brief description of symbols]
3 the support base 4 on fitting 5 oscillating frame 6 seat 7 backrest <br/> 8 armrest apparatus 17 blade unit
17a Female screw 28 provided on the blade portion of the swing frame Waist outer member (back support member)
28a Curved step
42 Lumbar outer member bolt insertion hole 43 Elbow post 45 Elbow rest 46 Mounting plate 47 Mounting portion 48 Spacer 49 Cover
50 Bolt insertion hole in the mounting part of the elbow strut
58 volts

Claims (2)

A support base fixed to the upper end of the leg support, a seat on which a person sits, a backrest on which a seated person can lean, a swing frame to which the backrest is attached and attached to the support base so as to be able to tilt backward, the swing frame A spring for supporting rearward tilting, and an armrest device having an elbow post, and the seat is attached to the support base and the swinging frame so as to tilt backward while moving backward with the backrest. Yes,
A chair called
The swing frame includes blade portions that spread outwardly on the left and right sides of the support base, and a shell-shaped waist outer member that wraps the waist of a person sitting on the blade portions of the swing frame overlaps from below. And a female screw for fixing the elbow strut is provided, while a mounting portion provided at a lower end of the elbow strut and a waist outer member include a blade portion of the swing frame. An insertion hole for a bolt that can be screwed into the female screw provided in the upper part, and an attachment part of the elbow strut is fixed to the blade part of the swinging frame with the bolt via a waist outer member.
Rocking chair. Synthetic resin spacer is interposed between the elbow strut attachment part and the waist outer member, and the bolt penetrates this space,
The rocking chair according to claim 1.

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