JP3654581B2 - Rocking chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synchro-type rocking chair.
[0002]
[Prior art]
In recent years, many synchro-type rocking chairs have been proposed in which the seat moves backward (and tilts backward) in conjunction with the back tilt of the backrest.
[0003]
For example, Japanese Patent Publication No. 7-16458 discloses a structure in which a seat body is connected to a front seat and a rear seat so that the seat body is flexibly connected when the seat body is directly supported by a machine frame fixed to the upper end of a leg. As described above, there is described a configuration in which when the backrest tilts backward, the front portion of the seat body moves backward without tilting backward, and the rear portion of the seat body tilts backward and tilting in conjunction with the backrest.
[0004]
Also, in Japanese Patent Publication No. 8-15448, the seat body can be bent in a side view, and the front part of the seat body can be slid forward and backward to a guide member provided at the front part of the machine frame. A configuration is described in which the seat is moved backward by tilting the backrest.
[0005]
[Problems to be solved by the invention]
By the way, when a seated person leans against the backrest, the relative distance between the backrest and the seating body increases, causing the phenomenon of back slipping in which the person's back moves relative to the backrest, giving the person a sense of incongruity, There is a possibility that a shirt drooping phenomenon occurs when the shirt is pulled upward.
[0006]
In order to prevent or suppress the phenomenon of back slip or shirt wrinkle, it is necessary to lock the backrest and the seat body in a state where the relative distance is not changed as much as possible. However, in both of the above publications, the seat body as a whole only moves backward and tilts in conjunction with the backrest, so there is a limit in suppressing the phenomenon of back slip or shirt drooping.
[0007]
In both of the above publications, the seat body is only supported by a shaft and a guide portion in a small area, and thus the stability of the seat body may be deteriorated.
[0008]
The present invention aims to solve these problems.
[0009]
[Means for Solving the Problems]
A rocking chair according to a first aspect of the present invention includes a support base provided at an upper end of a leg column, a swing frame attached to the support base so as to be tilted rearward, a backrest attached to the swing frame, and the swing chair. An upper metal fitting attached to the support base so as to move backward at least in conjunction with the rearward tilt of the frame, spring means for elastically supporting the rearward tilt of the swing frame, and a seat body supported by at least the upper metal fitting; The swing frame, the seat body, and the upper metal fitting are interlocked so that when the swing frame tilts rearward, the seat body can be moved backward more than the upper metal fitting.
[0010]
Further, the invention of claim 2 is a more specific embodiment of claim 1, and in this claim 2, the seat body has a structure in which a front seat body and a rear seat body are connected so as to be bent. The rear seat is attached to the swing frame so as to tilt backward more largely than the front seat, while the front seat is attached to the upper bracket so as to be movable relative to the front and rear and not upwardly disengageable. The rear seat body or the swing frame and the front seat body are moved backward relative to each other when the rear seat body or the swing frame tilts rearward more greatly than the front seat body. Accelerating means are provided.
[0011]
[Operation and effect of the invention]
According to the present invention, since the seat body is supported via the upper metal fitting, the seat body can be supported in a stable state, and the upper metal fitting also moves backward so that the backward movement of the seat body is smooth. . Furthermore, since the seat is retreated more than the upper metal fitting, it is possible to prevent or remarkably suppress the phenomenon of back slipping or shirt drooping during locking.
[0012]
According to the second aspect of the present invention, since the backward tilt angle of the front seat body is small, the phenomenon that the thigh is pushed up at the front portion of the seat body can be prevented, and a comfortable rocking state can be provided. In particular, when configured as in claim 3, since most of the body pressure of the person is supported by the front seat body, the seated person does not feel a sense of pressure or discomfort with the bending of the front and rear seat bodies. Therefore, a more comfortable locking state can be provided.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0014]
(1). First embodiment (FIGS. 1 to 7)
1 is a right side view of a chair, FIGS. 2 and 3 are longitudinal right side views, and FIGS. 4 and 5 are separated perspective views. First, the basic structure will be described based on these drawings.
[0015]
≪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, an upper bracket 4 covering the support base 3 from above, and a rear side of the upper bracket 4. , A seat body 6 supported by the upper metal fitting 4 and the swing frame 5, and a back portion 7 attached to the swing frame 5.
[0016]
A bracket 3 b is formed at the opening edge of the support base 3. 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 opened upward (the base cover 9 will be described later).
[0017]
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. Further, a longitudinally long slot 12 is formed in the front part of the left and right side plates 3 a in the support base 3, and a first pin 13 is inserted into the slot 12 and the side plate 4 a of the upper metal fitting 4.
[0018]
On the lower surface of the support base 3, a second bracket 14 having a U-shaped opening facing downward is fixed by welding or the like, and the swing frame 5 includes a side plate 5 a located outside the second bracket 14. The front end portion of the swing frame 5 is attached to the second bracket 14 by a second pin 15 penetrating the side plate 3 a of the support base 3.
[0019]
Further, the swing frame 5 and the upper metal fitting 4 are connected by a third pin 16. For example, as shown in FIG. 4, a wing-shaped receiving plate 17 that spreads in the left-right direction is fixed to the swing frame 5. A support (not shown) of an armrest device is fixed to the outer surface of the inclined portion of the receiving plate 17 with a screw.
[0020]
As shown in FIGS. 1 to 3, a downward rod 18 penetrating the swing frame 5 is non-rotatably attached to the rear portion of the support base 3, and a spring receiver 19 provided at the tip of the rod 18 is used. The coil spring 20 as an example of the elastic means is supported, and the swing frame 5 is received by the coil spring 20. The coil spring 20 is fitted in the holder 21.
[0021]
As shown in FIG. 3, a friction member 22 is provided between the holder 21 and the swing frame 5 to provide friction resistance to the rod 18 when the swing frame 5 tilts backward.
[0022]
The back portion 7 includes a waist outer member 23 formed in a concave shape facing forward in plan view so as to wrap the waist of a seated person, and a backrest 24 attached to the waist outer member 23. The waist outer member 23 is fixed to the receiving plate 17 of the swing frame 5 with screws.
[0023]
As shown in FIG. 2, the backrest 24 includes an outer shell (outer cover) 25, an inner shell (core plate) 26 disposed in front of the outer shell 25, and a cushion 27 stretched on the front surface thereof. The inner shell 26 of the backrest 24 is attached to the outer shell 25 and the lumbar outer member 23 by engaging means comprising engaging claws and engaging holes.
[0024]
≪ Seat mounting structure ≫
As shown in FIG. 3, the seat body 6 includes an inner shell (core plate) 28 made of a synthetic resin such as polypropylene and a cushion 29 stretched on the upper surface thereof. The inner shell 28 is a front inner shell. 30 and a rear inner shell 31.
[0025]
Hereinafter, the seat body 6 will be described with reference to FIG. 6 is a plan view of the inner shell 28 separated, FIG. 7A is a perspective view of the front inner shell 30 turned over, and FIG. 7B is the front inner shell 30 and the third shaft 16. FIG. 9A is a front view of the seat, FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8, and FIG. , 31 are connected to each other, and FIG. 11 is a sectional view taken along line XI-XI in FIG.
[0026]
Both the front and rear inner shells 30 and 31 are formed in a concave shape upward in a front view so as to fit a human body (buttock). Also, as shown in FIGS. 6 and 10, the rear surface of the front inner shell 30 is formed in a rearward convex shape in a plan view, while the front surface of the rear inner shell 31 is formed in a concave shape in a frontal view. .
[0027]
As shown in FIGS. 3 and 11, while the rear inner shell 30 is provided with the downward hook-like connecting locking claws 32 at the left and right ends of the rear portion of the front inner shell 30, A receiving portion 33 into which the coupling locking claw 32 is fitted from above is formed at both left and right end portions having a high height. The connecting claw 32 and the receiving portion 33 constitute the reverse acceleration means described in the claims.
[0028]
As shown in FIGS. 2 and 10, in the state where the front and rear inner shells 30 and 31 are connected, a slit-like gap 35 between them is vacant.
[0029]
As shown in FIGS. 3, 6, and 10, a first engagement claw 35 that is hooked on the rear end portion of the receiving plate 17 is formed at the rear end of the rear inner shell 31. In addition, upward second engagement claws 36 are formed on both sides of the rear end of the rear inner shell 31 with the first engagement claws 35 interposed therebetween, and the second engagement claws 36 are connected to the waist outer member 23. The engaging rib 37 formed in the above is engaged. Slits 38 are formed on both the left and right sides of the second engagement claw 36, so that the second engagement claw 36 can be easily engaged and disengaged.
[0030]
As shown in FIGS. 3 and 7 to 9, the front portion of the front inner shell 30 is fitted with a contact portion (slider) 40 that contacts the upper surface of the swing frame 5 and the front end portion of the intermediate metal fitting 4 from the front. A locking claw 41 is formed.
[0031]
An upward flange 42 is formed at the location of the locking claw 41. This is for attaching a seat cover (outer shell for seat) 43 as partially shown by a one-dot chain line in FIG. Although not shown in the drawing, the seat cover 43 is formed in a backward U shape in plan view so as to surround the periphery of approximately the front half of the inner shell 30.
[0032]
Further, a vertical rib 44 extending in the front-rear direction is formed on the lower surface of the front inner shell 30 in close contact with the outer surface of the upper metal fitting 4. The vertical ribs 44 also play a reinforcing role. On the lower surface of the front inner shell 30, a plurality of reinforcing ribs 45 extending in the vertical and horizontal directions are further formed. (Reinforcing ribs are also formed on the lower surface of the rear inner shell 31, but this point is omitted).
[0033]
As shown in FIG. 7, a bag-like portion 46 is formed at the rear end of the left and right vertical ribs 44 in the front inner shell 30 so as to open to the left and right inner sides and to the rear. On the other hand, a bush 47 made of synthetic resin is occluded on the left and right sides of the third shaft 16 in a side view, and the bush 47 is fitted into the bag-like portion 46.
[0034]
By fitting the bush 47 and the bag-like portion 46 together, the front inner shell 30 is held so as not to be separated upward, and the rear portion of the front inner shell 30 is supported by the third shaft 16, thereby An excessive load is prevented from being applied to the connecting claw 32 and the receiving portion 33 of the shells 30 and 31.
[0035]
In this case, since the bag-like portion 46 of the front inner shell 30 and the bush 47 are in surface contact with each other, the wear of the bush 47 can be prevented, and the front inner shell 30 is smoothly slid relative to the bush 47. Can be made.
[0036]
As shown in FIG. 3 and FIG. 9, when the seat body 6 is fully advanced, a certain gap is left between the front end surface of the upper metal fitting 4 and the locking claw 41. The seat body 6 is attached by fitting the engaging claws 41 of the front inner shell 30 into the upper metal fitting 4 from the front, and then engaging the engaging claws 35 and 36 of the rear inner shell 31 against elasticity. This can be done by a one-touch operation in which the rear end and the engaging rib 37 are pushed into engagement.
[0037]
≪Description of movement≫
In the above configuration, when a seated person leans against the backrest 22, the backrest 24 and the waist outer member 23 are integrally tilted backward, and the seat body 6 is retracted while being tilted backward.
[0038]
In this case, since the rearward tilt angle of the upper metal fitting 4 is smaller than the rearward tilt angle of the swing frame 5, the rearward inclination degree of the rear inner shell 31 is larger than the rearward inclination degree of the front inner shell 30. That is, the front and rear inner shells 30, 31 tilt backward while moving backward while changing their relative angles.
[0039]
As shown schematically in FIG. 11, since the connecting portion of the front and rear inner shells 30, 31 (the fitting portion between the connecting claw 32 for connection and the receiving portion 33) is high, the rear inner shell 31 is When the vehicle is tilted backward by a certain angle θ, the receiving portion 33 of the rear inner shell 31 moves in the rotational direction by a certain distance L. For this reason, the front inner shell 30 is pulled rearward.
[0040]
That is, when the front and rear inner shells 30 and 31 are relatively bent, the front inner shell 30 moves backward more than the rear inner shell 31, and as a result, the shirt turning phenomenon can be prevented or significantly improved.
[0041]
Further, the front inner shell 30 is formed in the rear portion due to the gap between the front end of the upper metal fitting 4 and the locking claw 41 and the gap 34 between the inner shells 30 and 31. Retreating relative to the inner shell 31 is allowed.
[0042]
In addition, since the upper metal fitting 4 is sandwiched from the left and right by the reinforcing vertical ribs 44 provided in the front inner shell 30, the seat body 6 does not shake from side to side when the chair is used. The chair can be used comfortably.
[0043]
When the front inner shell 30 is fully inclined backward, the rear portion is set to be supported by the flat portion 23a (see FIG. 5) of the waist outer member 23. For this reason, an excessive load is not applied to the rear inner shell 32.
[0044]
When the inner shells 30, 31 are not formed in an upwardly concave shape, as the backward acceleration means, the rear left and right ends of the front inner shell 30 and the front left and right ends of the rear inner shell 31 face upward. Protrusions may be provided and these protrusions may be connected with pins or the like.
[0045]
≪Base cover 9 mounting structure≫
Next, the base cover 9 will be described mainly based on FIGS. 12 is an exploded perspective view, FIG. 13 is a partially broken plan view, FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13, and FIG. 15A is a sectional view taken along line XV-XV in FIG. Fig. 4 is a cross-sectional view taken along line BB of (A).
[0046]
For example, as shown in FIG. 12, the bottom plate of the base cover 9 has an escape hole 49 through which the leg strut 1 and the leg cover 8 penetrate. Further, in order to prevent the left and right side plates 9a from interfering with the operation lever 50, an upward opening relief groove 51 is formed. If the escape groove 51 is not used, it should be closed with a cap.
[0047]
As shown in FIG. 15, a locking claw 52 that hits the flange of the support base 3 from above is formed at the tip of the base cover 9. The base cover 9 is open rearward, and the rear end is formed in an arc shape in plan view, while the front end portion of the waist outer member 23 faces forward in plan view corresponding to the rear end surface of the base cover 9. It is formed in an arc shape of the opening.
[0048]
For example, as shown in FIGS. 14 and 15, the second pin 15 is exposed to the left and right outer sides of the swing frame 5, while the base cover 9 has a downwardly exposed portion exposed to the second pin 15. A pair of left and right clamping parts 53 that are fitted against the elasticity are integrally formed. In this case, the left and right positions of the base cover 9 are regulated by sandwiching the swing frame 5 from the left and right sides with the left and right clamping portions 53.
[0049]
Further, as shown in FIG. 15, a protrusion 54 that contacts the lower surface of the support base 3 is provided on the bottom surface of the base cover 9 to prevent backlash. Further, as shown in FIG. 19, the base cover 9 is formed with a spacer portion 55 sandwiched between the outer side surface of the support base 2 and the inner side surface of the upper metal fitting 4. The position is maintained so that it cannot roll.
[0050]
≪Locking means≫
16 to 18 show an example of locking means for holding the backrest 24 and the seat body 6 at an arbitrary rearward tilt angle. 16 is a plan view of the main part, FIG. 17 is a sectional view taken along line XVII-XVII in FIG. 16 in the unlocked state, and FIG. 18 is a sectional view in the locked state.
[0051]
The lock means 56 includes a case 57 having a U-shaped opening facing downward, a horizontally long rod 58 penetrating the case 57, a lock plate 59 fitted to the rod 58 and the first shaft 13, and an adjacent lock plate. A friction washer 60 sandwiched between 59 and first and second collars 61 and 62 disposed on both sides thereof are provided. The lock plate 59 is fitted to the first shaft 13 so as not to be movable back and forth, and is fitted to the rod 58 so as to be movable relative to the front and rear.
[0052]
The rod 58 protrudes on both sides of the case 57, and a cam 63 is attached to one of the protrusions with a pin 64, and an operation lever 65 is integrally attached to the cam 64. The side plate 3a of the support base 3 has a long hole 66 for allowing the operation lever 65 to rotate up and down. The rod 58 is biased by a spring 67 in the direction opposite to the cam 63.
[0053]
In the state where the operation lever 65 is rotated downward as shown in FIG. 17, the left and right collars 61 and 62 are separated from each other, so that the lock plate 59 can freely move back and forth together with the first shaft 13. The backrest 24 can be freely rotated.
[0054]
On the other hand, when the operation lever 65 is rotated upward with the backrest 24 in an arbitrary posture, the rod 58 is pulled as shown in FIG. 59 and the friction washer 60 are clamped. For this reason, the lock plate 59 cannot be moved back and forth, and as a result, the first shaft 13 is held so as not to move back and forth, and the backrest 24 is locked in a desired posture.
[0055]
≪Others≫
The present invention can be embodied in various ways other than the above embodiment.
[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 a longitudinal side view.
FIG. 4 is an exploded perspective view.
FIG. 5 is an exploded perspective view.
FIG. 6 is a separated plan view of an inner shell in a seat body.
FIG. 7 is a perspective view of the seat body with the front inner shell turned upside down, and FIG. 7B is a view showing a relationship with the third axis in a state where (A) is viewed from the BB direction.
FIG. 8 is a partial front view of a seat portion.
9 is a cross-sectional view taken along the line IX-IX of FIG.
FIG. 10 is a partial plan view of an inner shell in a seat portion.
11 is a cross-sectional view taken along line XI-XI in FIG.
FIG. 12 is an exploded perspective view for explaining a base cover.
FIG. 13 is a plan view for explaining the base cover.
14 is a sectional view taken along line XIV-XIV in FIG.
15A is a cross-sectional view taken along line XV-XV of FIG. 14, and FIG. 15B is a cross-sectional view taken along line BB of FIG.
FIG. 16 is a plan view showing an example of locking means.
17 is a sectional view taken along line XVII-XVII in FIG.
18 is a cross-sectional view similar to FIG. 17 in the locked state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg support | pillar 3 Support base 4 Upper metal fitting 5 Swing frame 6 Seat body 13 1st axis | shaft 15 2nd axis | shaft 16 3rd axis | shaft 28 Inner shell 30 of a seat body Front inner shell 31 Rear inner shell 32 Locking 33 for connection Connection receiving part 41 Locking claw 46 Bag-like part 47 Bush

Claims (3)

A support base provided at the upper end of the leg support, a swing frame attached to the support base so as to be tilted backward, a backrest attached to the swing frame, and at least a backward movement in conjunction with a backward tilt of the swing frame. An upper metal fitting attached to the support base, spring means for elastically supporting the rearward tilting of the swing frame, and a seat body supported by at least the upper metal fitting,
The swing frame, the seat body, and the upper metal fitting are interlocked so that when the swing frame tilts rearward, the seat body can be moved backward more than the upper metal fitting,
Rocking chair. The seat body has a structure in which a front seat body and a rear seat body are connected so as to be bendable. The rear seat body is attached to a swing frame so as to tilt backward more than the front seat body. On the other hand, the front seat is attached to the upper metal fitting so as to be movable relative to the front and rear and not upwardly disengaged. The rear seat or the swing frame is attached to the rear seat or the swing frame and the front seat. Is provided with a reverse acceleration means for relatively moving the front seat backward by tilting backward more than the front seat,
The rocking chair according to claim 1. The boundary between the seat and the rear seat is located on the back side of the seated bone of the person who is seated,
The rocking chair according to claim 2.

Images