JP3776726B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair, in particular, it relates to install them structure the inner member for leaning back to back receiving member.
[0002]
[Prior art]
In a chair, a backrest and a seat are provided with an outer shell (outer member) and an inner shell (inner member), the inner shell is attached to the outer shell, and a cushion is stretched on the inner shell.
[0003]
As an example, Japanese Patent Laid-Open No. 11-56519 discloses that a plurality of locking pieces project from the front surface of the outer shell for the backrest, while the inner shell for the backrest is provided with a receiving portion, and the inner shell for the backrest is used for the backrest. Placing pushed from the front toward the outer shell, structure in which to fit the the receiving portion engaging pieces is described by deformation of against the elasticity.
[0004]
In addition, in Utility Model Registration No. 2537759, as a means for attaching the seat inner shell to the seat outer shell, a plurality of upward bosses having a snap claw at the upper end are provided on the seat outer shell. The seat inner shell is provided with a snap hole for fitting the snap claw by deformation against elasticity, and the seat inner shell is pressed against the outer shell from above to fit the snap claw into the snap hole. Is described.
[0005]
Further, in Utility Model Registration No. 2596930, as a means for attaching the inner shell for the backrest to the outer shell for the backrest, an arrowhead type engaging protrusion is provided on the outer shell for the backrest, while the inner shell for the backrest has a ring. It is described that an engagement hole to which a rubber seat is attached is provided, the inner shell for backrest is pressed from the front toward the outer shell, and the rubber seat attached to the engagement hole is fitted into the engagement protrusion of the outer shell. Has been.
[0006]
[Problems to be solved by the invention]
In any case, the conventional means for attaching the inner shell is provided with a male engaging portion on one of the outer shell and the inner shell, and a female engaging portion on the other, and the inner shell is used as the outer shell. Engagement means that presses and fits the male engagement portion and the female engagement portion by elastic deformation is employed.
[0007]
By the way, it is preferable that the inner shell can be removed from the outer shell for cushion replacement, repair, or separation after disposal. On the other hand, in a normal use state, it is preferable that the mounting strength is high so that the inner shell does not easily come off. Thus, the inner shell mounting structure requires conflicting functions.
[0008]
However, in the conventional attachment by the engaging means including the male engaging portion and the female engaging portion, if the catching strength between the male engaging portion and the female engaging portion is weak, for example, the inner shell If you put your finger on the edge of the lip and wake it up, the inner shell will easily come off.
[0009]
If the hooking strength between the male engaging portion and the female engaging portion is increased in order to increase the mounting strength, the so-called fit-in state is reached, and the cushion replacement and separation after disposal become extremely difficult.
[0010]
An object of the present invention is to improve such a current situation.
[0011]
[Means for Solving the Problems]
[0012]
[0013]
The chair of the present invention is a chair comprising a seat, a back receiving member that receives a back load when a seated person leans, and an inner member for a back that is attached to the front surface of the back receiving member. A first engagement for holding the backrest inner member forward and inseparable by fitting the backrest inner member downwardly along the front surface of the back support member to the front surface of the member and the back surface of the backrest inner member. Means and second engaging means for holding the first engaging means in a fitted state.
[0014]
Then, the second engaging means, and an upward engagement claw provided in the lower portion of the backrest for an inner member, be constituted by a stopper projecting from the front surface of the back receiving member, the upward engaging claw is pressing forward has become the stopper to disengage, further between the lower and the back receiving member of said backrest for an inner member, before the upward engaging claw insert the human finger A gap that can be pushed and bent is provided.
[0015]
According to a second aspect of the present invention, in the first aspect , the back support member is formed in a concave shape facing forward in plan view so as to wrap a person's waist, while the lower part of the inner member for the backrest is the back support member. In addition, a back cover is detachably mounted on the back surface of the portion of the inner member for backrest that is exposed upward from the back support member.
[0016]
[Operation and effect of the invention]
In the present invention, the inner member for leaning back, is held non detached forward by the first engagement means.
[0017]
Therefore, even if to provoke Put your finger to the edge of the back for an inner member, the inner member does not come off seat back. Therefore, it is possible to attach the inner member seat back with high strength to the back receiving member.
[0018]
Then, when the finger is put into the gap between the lower part of the inner member for the backrest and the back support member and the upward engaging claw is pushed forward and the engagement is released from the stopper, the fitted state of the first engaging means is released. can do. Therefore, by setting the upward engaging pawl to allow disengaged with a light force from the stopper, the inner member seat back, can be removed or we simply back receiving member.
[0019]
Thus, according to the present invention, in mounting the inner member for back sagging the back receiving member, and improving the attachment strength, repair and after disposal and ease of removal of the In fractionation can be achieved simultaneously.
[0020]
In addition, even if there is a gap between the lower part of the backrest inner member and the back support member, the gap is inconspicuous, so that the inner member for the backrest can be easily removed without deteriorating the aesthetics. be able to.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0022]
(1). First embodiment (FIGS. 1 to 13)
1 to 13 show a first embodiment (main embodiment). Of these drawings, FIG. 1 is a right side view of the chair, FIG. 2 is a longitudinal right side view, and FIG. 3 is an exploded perspective view. First, the basic structure of the chair will be described based on these drawings.
[0023]
(2). 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 bracket 4 covering the support base 3 from above. , A swing frame 5 disposed behind the upper bracket 4, a seat 6 supported by the upper bracket 4 and the swing frame 5, and a back portion 7 attached to the swing frame 5. The leg support 1 is covered with a leg cover 8, and the support base 3 is covered from below with a base cover 9 that opens upward.
[0024]
A first bracket 10 is fixed to the bottom surface of the support base 3, and an upper end of the leg support 1 is fitted to a bush 11 fixed to the first bracket 10 and the support base 3. 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.
[0025]
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.
[0026]
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. 3, a wing-shaped receiving plate 17 extending in the left-right direction is fixed to the swing frame 5.
[0027]
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.
[0028]
(3). Structure of Seat 6 As shown in FIG. 2, the seat 6 comprises a seat inner member 22 made of polypropylene synthetic resin and a cushion 24 stretched on the upper surface thereof. Is divided into a front inner shell 22a and a rear inner shell 22b. The cushion 24 is stuck on the front and rear inner shells 22a and 22b.
[0029]
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. 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.
[0030]
When the seated person leans against the back portion 7, the swing frame 5 tilts backward against the coil spring 20, and the upper metal member 4 and the seat 6 tilt backward while retracting. 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. 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 FIG. 1, a seat cover (seat outer shell) 27 is attached to the front inner shell 22a.
[0031]
(4). Structure of the back portion 7 The back portion 7 is attached to the front surface of the waist outer member 28 and a waist outer member (back support member) 28 formed in a concave shape facing forward in plan view so as to wrap the waist of the seated person. An inner member (core plate) 29 for backrest is provided.
[0032]
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. ing. The waist outer member 28, the backrest inner member 29, and the back cover 30 are made of a synthetic resin such as polypropylene.
[0033]
Hereinafter, the details of the back portion 7 will be described with reference to FIG. 4 is a front view of the lumbar outer member 28, FIG. 5 is a cutaway perspective view of the lumbar outer member 28, FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 8A is a sectional view taken along line AA in FIG. 7, FIG. 8B is a sectional view taken along line BB in FIG. 7, and FIG. 8C is a sectional view taken along line CC in FIG. 9 (A) is a cross-sectional view taken along the line IXA-IXA in FIG. 7, FIG. 9 (B) is a cross-sectional view taken along the line IXB-IXB in FIG. 7, and FIG. , (B) is a cross-sectional view taken along the line BB of (A), (C) is a partially enlarged view of (A), FIG. 11 is a side cross-sectional view of the back portion 7 taken along the line CC in FIG. Of these, (A) is a partially enlarged view of FIG. 10 (A), and (B) is a BB view of (A).
[0034]
(5). Lumbar outer member 28
As shown in FIG. 2 and FIGS. 4 to 6, 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 into which a spring holder 21 is fitted at the bottom. 31 is vacant. Further, the waist outer member 28 is formed with a step portion 28b that overlaps the rear portion of the seat 6 in a plan view, and a window hole 33 that is large enough to allow a person to insert a palm above the step portion 28b. Is vacant.
[0035]
In addition, a first rib 34 extending in a horizontal shape is integrally formed slightly above the step portion 28b in the front surface of the waist outer member 28, and as shown in FIG. 13, the receiving plate 17 of the swing frame 5 is formed. Is fixed to the first rib 34 with a screw 25. For this reason, as shown in FIG. 5, the first rib 34 has a screw insertion hole 34a. Further, the sixth rib 43 is also fastened to the rear end portion of the swing frame 5 with a screw, so that a screw insertion hole 43a is vacant.
[0036]
Further, a second rib group 36 extending in the front-rear direction is provided on the left and right step portions 28 b of the waist outer member 28. Reference numeral 37 in FIG. 13 denotes a lower end portion of a support column in the armrest device, and is fastened to the receiving plate 17 with screws (not shown).
[0037]
As a part of the first engaging hand female, an upward saddle-type engaging claw 38 is integrally formed on the upper portion of the front surface of the waist outer member 28. In this embodiment, two upward saddle-type engaging claws 38 are arranged at two positions with different heights at the upper portion of the central portion of the waist outer member 28 and at the left and right sides thereof.
[0038]
Further, a group of third ribs 39 extending horizontally and a group of fourth ribs 40 extending in the vertical direction are integrally formed in a portion of the front surface of the waist outer member 28 above the first ribs 34. . The rib groups 39 and 40 have a function of reinforcing and a function of maintaining a distance between the waist outer member 28 and the backrest inner member 29.
[0039]
The third rib 39 in the fourth step from the top is divided into left and right via a gap 41, and both sides of the fourth rib 3 39 sandwiching the gap 41 form stoppers 42. The stopper 42 is a part of the second engaging means described in the claims.
[0040]
A pair of left and right fifth ribs 43 and a sixth rib 44 positioned therebelow are provided in a portion of the waist outer member 28 below the first ribs 34, and further, the holes 31 are sandwiched between the bottom plates. Seventh ribs 45 extending in an inclined manner in side view are formed on both sides. The fifth rib 43 prevents the backing plate 17 from being lifted. Further, the sixth rib 44 fits inside the swing frame 5, and for this reason, the swing frame 5 is positioned by the sixth rib 44 so that it cannot be shifted left and right. Further, the swing frame 5 is positioned in the vertical direction by the seventh rib 45.
[0041]
As shown in FIG. 2, an auxiliary catch 46 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. The auxiliary catch 46 is engaged with the first rib 34 by deformation against elasticity by pressing the rear inner shell 22b downward.
[0042]
(6). Inner member 29 for backrest and back cover 30
As shown in FIG. 4 by the dashed line, the backrest for an inner member 29 has its substantially majority portion is set so as to overlap with the waist outer member 28. For example, as shown in FIG. 10, a cushion 48 is stretched on the front surface of the waist outer member 28.
[0043]
The height of the backrest inner member 29 can be arbitrarily set, and may completely overlap with the waist outer member 28 or may extend greatly upward from the waist outer member 28.
[0044]
As shown in FIGS. 7, 8, 10, and 12, the back portion of the inner member 29 for the backrest that overlaps with the waist outer member 28 faces upward on the waist outer member 28 as part of the first engagement means. A downward saddle-type engaging claw 49 that fits into the saddle-type engaging claw 38 from above is formed. A side plate 38 a is provided at each of the downward saddle type engaging claws 49 so as to sandwich the upward saddle type engaging claws 38 from the left and right. For this reason, the inner member 29 for the backrest is positioned so that it cannot move left and right.
[0045]
As can be understood from FIG. 12, a and left and right intermediate portions in the lower portion of the backrest for an inner member 29, as part of the second engaging means, the upper facing plate engaging hitting from below the stopper 42 of the waist outer member 28 A claw 51 is provided.
[0046]
The plate-like engagement claw 51 extends obliquely upward in a side view, and when the finger 50 is inserted downward into the gap between the waist outer member 28 and the backrest inner member 29 and pressed forward, The engagement can be released. A gap 41 is provided between the left and right stoppers 42 so that the upper edge of the plate-like engagement claw 51 can be strongly pressed with the finger 50.
[0047]
A protrusion 52 extending over the entire length of the back surface of the inner member 29 for the backrest that overlaps with the upper end edge of the waist outer member 28 is formed. An upward hook-shaped receiving claw 53 is formed (in the case of this embodiment, the receiving claw 53 at the intermediate portion is not necessary).
[0048]
For this reason, there is a gap opened upward between the upper end edge of the waist outer member 28 and the inner member 29 for the backrest, and the stepped portion 30a formed at the lower end of the back cover 30 is inserted into this gap. . Further, forward bulging portions 54 that fit into the receiving claws 53 of the backrest inner member 29 are formed at portions near the left and right ends of the back cover 30.
[0049]
A pair of left and right bosses 55 and three hook-shaped locking claws 56 project from the front surface of the back cover 30, and a positioning hole 57 into which the boss 55 fits in the backrest inner member 29, An engagement hole 58 into which the mold locking claw 56 is fitted by deformation against its elasticity is formed.
[0050]
In this case, since the upper part of the inner member 29 for the backrest has an uneven structure for reinforcement or the like, the boss 55 is formed with ribs 59 for maintaining a distance from the inner member 29 for the backrest. . Further, the hook-shaped locking claws 56 are arranged at the left and right central portions and the portions near the left and right ends, and the directions of the claws are different between those arranged at the central portion and those arranged at the portions near the left and right ends.
[0051]
The cushion 48 is stretched on the backrest inner member 29 by an insert molding method. In this case, the positioning of the backrest inner member 29 with respect to the mold is performed by fitting the positioning hole 57 to the pin provided in the mold. Reference numeral 60 shown in FIG. 7 is also a hole for positioning the backrest inner member 29 in the mold.
[0052]
(7) Summary As can be understood from the above description, first, the back cover 30 is attached to the inner member 29 for the backrest, and then the inner member 29 for the backrest is moved downward with the front surface of the outer waist member 28 being overlapped. Then, when each of the downward saddle type engaging claws 49 is fitted into the upward saddle type engaging claws 38 in a state where the plate shaped engaging claws 51 are elastically deformed, the plate shaped engaging claws 51 are elastically deformed and then return deformed. Then, the stopper 42 is engaged from below and the backrest inner member 29 is attached to the waist outer member 28.
[0053]
In this state, since the inner member 29 for backrest is immovable forward, it does not come off even if an external force that causes this acts on the inner member 29 for backrest. Further, when the finger is inserted from below the backrest inner member 29 and the plate-like engagement claw 51 is pushed with the finger to release the engagement with the stopper 42, the backrest inner member 29 can be easily removed.
[0054]
When the lower end edge of the back cover 30 is sandwiched between the backrest inner member 29 and the waist outer member 28 as in the present embodiment, the outer surfaces of the back cover 30 and the waist outer member 28 can be aligned, resulting in excellent aesthetics. There is an advantage that the mounting strength of the back cover 30 can be improved. Further, the back cover 30 can be eliminated.
[0055]
In the case where the back cover 30 is provided as in the present embodiment, the attachment to the backrest inner member 29 may employ engaging means different from the present embodiment (screwing may be employed). Further, the back cover 30 may be attached to the backrest inner member 29 by the method of the present invention.
[0056]
(8). Other embodiment (FIGS. 14 to 16)
FIG. 14 shows a second embodiment, which is another example of the first engaging means, and includes an engaging claw 61 extending vertically in a vertical shape in the shape of a plan view on the waist outer member 28 and the backrest inner member 29. 62 is formed.
[Brief description of the drawings]
FIG. 1 is a right side view of a chair according to a first embodiment.
FIG. 2 is a vertical right side view.
FIG. 3 is an exploded perspective view.
FIG. 4 is a front view of a waist outer member.
FIG. 5 is a cutaway perspective view of a waist outer member.
6 is a cross-sectional view taken along the line VI-VI in FIG. 4;
FIG. 7 is a separated front view of the backrest inner member and the back cover.
8 is a sectional view taken along line AA, BB, and CC in FIG. 7;
9 is a sectional view taken along line IXA-IXA and line IXB-IXB in FIG.
10A is a longitudinal side view of a back portion, FIG. 10B is a sectional view taken along the line BB of FIG. 10A, and FIG. 10C is a partially enlarged view of FIG.
11 is a side cross-sectional view of the back portion taken along the CC line of FIG. 7;
12A is a partially enlarged view of FIG. 7A, and FIG. 12B is a BB view of FIG.
FIG. 13 is a front sectional view showing a relationship between a swing frame and a waist outer member.
FIG. 14 is a diagram illustrating a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 Support base 4 Upper metal fitting 5 Swing frame 6 Seat 7 Back part 17 Receiving plate 22 Inner member for seat 28 Lumbar outer member (back support member)
29 Inner member for backrest 30 Back cover 38 Upward hook type engaging claw (first engaging means)
42 Stopper (second engaging means)
49 Downward vertical hook engaging claw (first engaging means)
51 Plate-like engagement claw (second engagement means)

Claims (2)

A seat, a back receiving member that receives a back load when a seated person leans back, and an inner member for the back that is attached to the front surface of the back receiving member;
When the backrest inner member is moved downward along the front surface of the back support member to the front surface of the back support member and the back surface of the backrest inner member, the back support member is fitted to each other to hold the backrest inner member forwardly and inseparably. 1 engaging means and a second engaging means for holding the first engaging means in a fitted state,
Said second engagement means includes a upward engagement claws provided in the lower portion of the backrest for an inner member, be constituted by a stopper projecting from the front surface of the back receiving member, the upward engaging claw is in front When it is pressed, it will be disengaged from the stopper.
Further, between the lower and the back receiving member of said backrest for an inner member is provided with a gap people can bend press the upward engaging claw insert the fingers in front,
Chair. The back support member is formed in a concave shape facing forward in plan view so as to wrap a person's waist, while the inner member for the backrest partially overlaps the back support member,
Furthermore, a back cover is detachably attached to the back surface of the portion exposed upward from the back support member of the inner member for the backrest.
The chair according to claim 1 .

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