JP4132734B2 - Rocking chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called synchro-type rocking chair.
[0002]
[Prior art]
In a rocking chair in which the seat body and the backrest are separately configured, the seat body is tilted rearward or backward in conjunction with the rearward tilt of the backrest in order to improve the fit at the time of rocking (for example, Japanese Patent Publication No. 2). No. -24527, Japanese Patent No. 2683997, and 2797273).
[0003]
[Problems to be solved by the invention]
In the case of rocking chair only be tilted backward backrest, since the seat support and the backrest at the time of locking away large, the phenomenon of a seated person's shirt is upward shift up so-called Resid shirts turn-up occurs.
[0004]
The synchro-type chair can suppress the phenomenon of shirt drooping by suppressing an increase in the distance between the backrest and the seat during locking, and this is a major factor for improving the fit.
[0005]
However, in a chair with a separate backrest and seat, even if it is a synchro-type chair, it has not been possible to reliably prevent the gap between the seat, the rear end and the lower end of the backrest from being widened when locking. However, most of them did not give enough satisfaction to users.
[0006]
The present invention aims to improve such a current situation.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, a seat receiver attached to the leg portion, an intermediate support disposed above the seat receiver, a seat attached to the intermediate support so as to be movable back and forth, and the seat A back support frame that is connected to the support body so as to be tilted rearward and to which a backrest is attached; and a spring means that elastically supports the rear tilting of the back support frame; and the seat support body and the intermediate support body, the back support frame, in conjunction with the tilting after the back support frame intermediate the support is coupled to the retraction and rearward tilting movement be so that, furthermore, engaging said the intermediate support, the upper end to the seat body On the other hand, the seat receiving body is provided with guide means for guiding the link body so that when the back support frame tilts backward, the link body rotates in a direction in which the upper end of the link body moves backward. And the back support frame tilts backward That the upper end of said link member is configured to retract at a greater rate than the intermediate support.
[0008]
Further, in the first aspect of the present invention, the front portion of the intermediate support body and the seat receiving body are connected by a first horizontal supporting shaft, and the front portion of the back support frame and the seat receiving body are second horizontally horizontal. The intermediate support is connected to the rear portion of the intermediate support body and the back support frame by a horizontal horizontal third support shaft, and the first support shaft and the hole in which the first support shaft is fitted are connected to a slide shaft and an elongated hole. With this set, the intermediate support body moves backward and backward in conjunction with the rearward tilt of the back support frame, and the link body is fitted to the first support shaft.
[0009]
[0010]
In the invention of claim 2, Oite to claim 1, wherein the seat body is attached to the intermediate support by adjustable state longitudinal position.
[0011]
According to a third aspect of the present invention, in the second aspect of the present invention, the seat body is provided with a plurality of engaging portions in which the upper end portion of the link body is fitted in the front-rear direction so as not to be displaced forward and backward. Due to the elastic deformation of the seat body, the location of the engaging portion is raised to a state where the engagement with the link body is released.
[0012]
[0013]
[Operation and effect of the invention]
In the synchro-type rocking chair according to the present invention, at the time of rocking, the seat body can be moved backward relative to the intermediate support so as to accurately follow the rearward tilt of the backrest. it can.
[0014]
As a result, the distance between the lower end of the backrest and the rear end of the seat body can be prevented from causing a so-called shirt drooping phenomenon to the seated person, and a comfortable rocking state can be given to the seated person.
[0015]
In addition, since the seat body is forcibly moved backward by the link body , the followability of the backward movement of the seat body with respect to the backward tilting of the backrest is high, thereby providing a more comfortable rocking state. Furthermore, since the link body is used, the seat body can be accurately moved backward with a simple structure.
[0016]
Also , the timing at which the seat starts to move backward relative to the intermediate support, the timing at which the seat finishes moving backward relatively, or the amount by which the seat moves backward relative to the intermediate support (or The ratio can be easily changed, and can be applied to various chairs.
[0017]
If comprised like Claim 2 , the front-back position of a seat can be adjusted according to the person from whom a physique differs.
[0018]
More constructed as claimed in claim 3, since that allows the position adjustment before and after the seat body by using an auxiliary interlocking mechanism, yet rocking chair can adjust the longitudinal position of the seat body according to the physical constitution of the seated person, number of components There is an advantage that can be reduced.
[0019]
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0021]
1 is a front view, FIG. 2 is a right side view, FIG. 3 is a longitudinal side view, FIG. 4 is a longitudinal side view in a locked state, FIGS. 5 to 10 are perspective views of components, and FIG. FIG. 12 is a sectional view taken along line XII-XII in FIG. 3, FIG. 13 is a partial sectional side view, and FIGS.
[0022]
(1) Outline As shown in FIGS. 1 and 2, the chair includes a leg provided with a pedestal (gas cylinder) 1, a seat receiver 2 fixed to the upper end of the pedestal 1, and a seat receiver 2. An intermediate support 3 disposed above, a seat 4 attached to the intermediate support 3, a backrest 5, and a back support frame 6 are provided.
[0023]
The front portion of the seat body 4 and the front portion of the intermediate support 3 are connected by a first support shaft 7 that is long in the left-right direction, and the front end portion of the back support frame 6 and the seat support body 2 are in a second support that is long in the left-right direction. The back support frame 6 and the seat body 4 are connected by a left and right long third support shaft 9 at a portion rearward of the second support shaft 8.
[0024]
Each member is connected through shafts 7, 8, and 9 so as to be relatively rotatable, and the hole of the seat body 4 in which the first support shaft 7 is fitted is a long hole 10 that is inclined in a rear view. Thus, the first support shaft 7 is used as a slide shaft. For this reason, when the backrest 5 tilts backward, the intermediate support 3 and the seat body 4 move backward while tilting backward at a rate smaller than the backward tilting rate of the backrest 5.
[0025]
[0026]
A back substrate 11 is fixed to the upper portion of the back support frame 6, and a backrest 5 having a cushion on a backrest plate (back inner) 12 made of synthetic resin is attached to the back substrate 11.
[0027]
[0028]
For example, as shown in FIGS. 5 to 7, the seat receiving body 2 is formed on the upwardly open box-like, to the rear of its interior, the bracket 16 for fixing the whole bushing fitting legs post 1 It is fixed.
[0029]
As described above, the long hole 10 is formed in the front part of the left and right side plates of the seat support 2, and the first support shaft 7 passes through the long hole 10. A synthetic resin bush is mounted in the long hole 10.
[0030]
As shown in FIGS. 5 and 12, a pair of left and right torsion coil springs 17 are fitted on the second support shaft 8 as an example of elastic means. Both torsion coil springs 17 are fitted on spring receivers 18.
[0031]
The spring receiver 18 is rotatably fitted to the second support shaft 8, and the spring receiver 18 is formed with a load receiving portion 18 a that extends substantially forward in a U shape in a side view. The one end portions 17a of the torsion coil springs 17 that are close to each other extend so as to hold the load receiving portion 18a of the spring receiver 18 from below.
[0032]
The other end portions 17b of the torsion coil spring 17 that are separated from each other are raised upward and extend rearward. These other end portions 17b are, for example, a rear bearing 19 formed on the intermediate support 3 as shown in FIG. It hits from below.
[0033]
As shown in FIGS. 3 and 5, the bolt receiver 20 is fitted in the upward recess of the load receiving portion 18a of the spring receiver 18 so as not to turn, and the bolt 21 is fitted into the bolt receiver 20 so as not to rotate. waiting. The bolt 21 penetrates the seat receiver 2, and an adjustment knob 22 is screwed into the bolt 21 from below.
[0034]
When the adjustment knob 22 is rotated, the spring receiver 18 is rotated and the initial torsion amount of the torsion springs 17 is changed. Thereby, the initial elastic force of both torsion springs 17 can be adjusted.
[0035]
(2). Intermediate support body The intermediate support body 3 is also shown in each of FIGS. The intermediate support member 3 is made of synthetic resin (or a metal such as steel plate), a front portion of the lower surface projecting a pair of right and left front bearing 23 in which the first support shaft 7 penetrates downward and, in the rear, it is projected a second support shaft 8 fits right and left pair of rear bearing 19 downward.
[0036]
Further, for example, as shown in FIG. 7 (a perspective view in a state where the intermediate support 3 is turned upside down), a first rail portion 24 having an L-shaped front section is formed inside the left and right front bearings 23. A square front space 25 is vacant between the first rail portions 24.
[0037]
In addition, a pair of left and right first bearings 26 project downward from the lower surface of the intermediate support 3 at a position rearward of the first rail portion 24 in a state where it is positioned slightly to the left and right outside of the first rail portion 24. A pair of left and right second support bearings 27 project from the rear side, and a pair of left and right second rail portions 28 project downward from the rear side.
[0038]
The left and right side edges of the intermediate support 3 are guide edges 29 extending linearly in the front-rear direction. A number of reinforcing ribs are formed on the upper surface of the intermediate support 3.
[0039]
(3). Tilt range adjustment mechanism As shown in FIGS. 6 and 7, for example, a pair of left and right cam bodies (movable lock body or cam-type stopper) integrally connected to the second support shaft 8 via a cylindrical portion. 30 may be rotatably fitted.
[0040]
The left and right cam bodies 30 are provided with first to fourth cam surfaces 4a to 4d having different distances from the rotation center so that the tilting range of the backrest 5 can be switched to the first to fourth ranges. Is formed.
[0041]
On the other hand, a cam receiver 31 having a forwardly inclined receiving surface 31a is fixed to the left and right sides of the bracket 16 provided on the seat receiver 2 (that is, below the left and right cam bodies 30). The cam receiver 31 and the cam body 30 are made of synthetic resin in this example, but may be made of die-casting.
[0042]
As shown in FIG. 7, pinion teeth 32 are formed on the outer peripheral surface of the base portion of the cam body 30.
[0043]
On the other hand, as shown in FIG. 3, a plate-like second rack body (second slider) 34 that meshes with the pinion teeth 32 of the cam body 30 is disposed on the lower surface of the intermediate support 3. The second rack body 34 is supported by the left and right second rail portions 28 in the intermediate support 3 so as not to fall and to move forward and backward.
[0044]
Further, a second operation lever 35 is rotatably supported on the second support bearing 27 of the intermediate support 3, and a second pinion gear 36 that meshes with the second rack body 34 is supported on the second operation lever 35. It is fixed. The second operation lever 35 extends to the outside of the intermediate support 3 and has a knob on the outwardly exposed portion.
[0045]
Accordingly, as shown in FIGS. 14 to 15, when the second operation lever 36 is rotated, the cam body 30 rotates, and the cam surfaces 30 a to 30 d can selectively hit the receiving surface 31 a of the cam receiver 31. For this reason, the backrest 5 can change the tilting range into three ranges, a large range, a middle range, and a small range, starting from the neutral state.
[0046]
The rear side of the receiving surface 31a of the cam receiver 31 is an inclined surface 31b so that the cam body 30 fits in an obtuse corner formed by the receiving surface 31a and the inclined surface 31b in each posture. It has become. For this reason, the cam body 30 is supported by the cam receiver 31 in a stable state.
[0047]
The front portion of the receiving surface 31a is in contact with the vertical front wall 31c (with the fourth cam surface 31d farthest from the rotational axis being in contact with the front end of the receiving surface 31a, the cam body 30 is It may be set so as to hit 31c, so that the stability of the posture of the cam body 30 can be improved.)
[0048]
(4). Locking mechanism As shown in FIGS. 7 and 13, for example, a pair of left and right upper locking bodies 37 extending rearward is fitted to the first support shaft 7 so as to be rotatable. Pinion teeth 32 are formed on the outer periphery.
[0049]
On the other hand, in the rear of the first support shaft 7 of the inner part of the seat receiving member 2, under the pair corresponding to the upper engaging member 37 lock body 38 is fixed. On the lower surface of the upper locking body 37 and the lower surface of the lower locking body 38, sawtooth-shaped locking claws 39 that can mesh with each other are formed. And the lower latching body 38 is set so that it may extend long in the front-back direction so that both the latching claws 39 can engage with each other even if the first support shaft 7 moves backward.
[0050]
Further, the locking claw 39 of the upper locking body 37 is inclined toward the front side in a side view, and the locking claw 39 of the lower locking body 38 is inclined toward the rear. Yes. For this reason, the upper and lower locking claws 39 are of a ratchet type, and the rear movement of the upper locking body 37 is allowed and the return movement is impossible.
[0051]
A torsion spring 40 is fitted on the upper locking body 37, and the upper locking body 37 is pushed by the torsion spring 40 in a direction of rotating downward. One end of the torsion spring 40 hits the upper locking body 37 from above, and the other end is locked to the intermediate support 3.
[0052]
As shown in FIG. 13, a first rack body (first slider) 41 that meshes with the pinion teeth 32 of the upper locking body 37 is provided on the lower surface of the intermediate support 3 above the upper locking body 37. It is arranged. The second rack body 34 is integrally connected at the rear portion so as not to interfere with the front recess 25 of the intermediate support 3.
[0053]
A first operating lever 42 is rotatably inserted into the first bearing 26 of the intermediate support 3, and a second pinion gear 43 fixed to the first operating lever 42 is engaged with the second rack body 34. Yes. Accordingly, when the first operation lever 42 is rotated, the upper locking body 37 can be turned up and down.
[0054]
Since meshing the pinion teeth and the first rack member 41 of the upper engaging member 37, the spring force of the torsion spring 40 acts to retract the first rack member 41. Therefore, the first rack body 41 can be positioned on the near side against the torsion spring 40 by an elastic engagement means (not shown). The elastic engagement means may be provided on the upper locking body 37 or may be provided on the first operation lever 42.
[0055]
Therefore, in the free state in which the first rack body 41 has advanced, the upper locking body 37 is separated from the lower locking body 38, and the first rack body 41 is moved backward to lock by rotating the first operating lever 42. In this state, the upper locking body 37 can be biased downward by the torsion spring 40 and can be engaged with the lower locking body 38.
[0056]
Note that it is sufficient that at least one claw is provided on the upper locking body 37. It is also possible to provide a large number of claws on the upper locking body 37 and provide only one or a small number of claws on the lower locking body 38.
[0057]
As shown in FIGS. 3 and 8, a stopper 33 is provided on the lower surface of the intermediate support 3 between the first bearing 26 and the second bearing 27 so as to describe the moving positions of the rack bodies 34 and 41. Provided.
[0058]
(5) Auxiliary interlocking mechanism The seat body 4 comprises a synthetic resin seat substrate (inner shell) 45 and a cushion 46 stretched on the upper surface thereof. As shown in FIG. 10, the seat substrate 45 is formed with a large number of slits so as to fit and deform a human buttock.
[0059]
As clearly shown in FIG. 11, the left and right side edges of Zamoto plate 45, circle guide grooves 47 fitted from the outside on the left and right guide edge portion 29 of the intermediate support member 3 is formed. For this reason, the seat substrate 45 cannot be separated upward with respect to the intermediate support 3 and can move back and forth with respect to the intermediate support 3.
[0060]
When the intermediate support 3 and the seat substrate 45 are slidably fitted to the left and right sides as in the present embodiment, when an external force that causes the seat 4 to turn horizontally is applied, the rail 29 and the guide groove Since the external force hardly acts as a moment with respect to 47, the mounting strength of the seat body 4 can be improved.
[0061]
In addition, since it is possible to allow the seat substrate 45 to be greatly bent and deformed downward, there is also an advantage that deterioration of sitting comfort can be prevented. Furthermore, since it is not necessary to provide these ribs at the end portion, it is excellent in that the rail portion 29 and the guide groove 47 can be easily formed into a long state.
[0062]
As shown in FIGS. 3 to 5, an auxiliary interlocking mechanism for retracting the seat body 4 at a rate larger than that of the intermediate support body 3 is provided at a position between the left and right upper locking bodies 37 of the first support shaft 7. As a main member, a link body (lever member) 48 having a square shape (or a bell crank shape) in side view is rotatably fitted.
[0063]
A guide shaft 49 extending outward in the left and right directions is integrally formed at the lower portion of the link body 48, and the guide shaft 49 is formed on the side surface of the lower locking body 38 on both the left and right sides of the seat substrate 45. The guide groove 50 is slidably fitted into the inclined guide groove 50 as viewed from the side.
[0064]
The link body 48 is an example of an operating body in the auxiliary interlocking mechanism, and the guide groove 50 of the lower locking body 38 is an example of guide means. Therefore, the lower locking body 38 also serves as a constituent member (guide body) of the auxiliary interlocking mechanism.
[0065]
On the other hand, the front of the seat board 45 is formed with a downward bracket 51, and the side surface arc-shaped engagement groove 52 is formed as an example of the engagement means on the lower surface of the downward brackets 51, the The upper end edge of the link body 48 is fitted ( engaged ) in the engagement groove 52 . In this case, the front and rear engagement grooves 52 are formed in the downward bracket 51.
[0066]
As the engaging means, a downward projection may be provided on the seat substrate 45, and the link body 48 may be formed with a recess that fits into the projection.
[0067]
Since the seat substrate 45 can be bent and deformed, when a person lifts the central portion of the front edge of the seat substrate 45 in a non-sitting state, the fitting between the link body 48 and the engagement groove 52 can be released. The front end portion of the seat body 4 may be biased downward by a spring so that the front portion of the seat body 4 can be lifted against the spring.
[0068]
By selecting the engagement groove 52 that fits into the link body 48, the front-rear position of the seat body 4 can be adjusted according to the physique and preference of the person. In the seated state, the seat body 45 is pushed downward by the body pressure, so that the engagement groove 52 does not come off from the link body 48.
[0069]
Incidentally, the engaging groove 52 may be the two or four or more, the seat support 4 may be position adjustment unsaturated ability before and after.
[0070]
As shown in FIG. 3, the link body 48 extends upward through a front space formed in the intermediate support 3.
[0071]
As shown only in part in FIG. 11, of the lower part of the seat body 4, the outer part of the intermediate support 3 is covered with the lower cover 53 (the lower cover 53 has a U-shape that opens backward in plan view). It has become of the shape.).
[0072]
As can be easily understood from the comparison between FIG. 3 and FIG. 4, when the seated person leans against the backrest 5 and the seat body 4 tilts backward, the seat body 4 tilts backward and retracts together with the intermediate support body 3. However, the link body 48 is rotated by the guide action of the guide groove 50, so that the seat body 4 moves backward relative to the intermediate support 3.
[0073]
Therefore, the distance between the seat body 4 and the backrest 5 can be kept constant, or the rate at which the backrest 5 and the seat body 4 separate as the backrest 5 is tilted backward can be reduced. The phenomenon of shirt turning can be prevented or suppressed.
[0074]
The timing at which the seat 4 starts to move backward relative to the intermediate support 3, the timing at which the seat 4 finishes moving backward relative to the intermediate support 3, and the intermediate support 3. The ratio of the seat body 4 to move backward relatively varies depending on the angle of the guide groove 50 and the shape of the side surface, or by changing the ratio of the vertical length of the link body 48 across the center of rotation. Can be set.
[0075]
(6). Others invention Ru can be in addition to various embodied also in the above embodiment.
[0076]
[0078]
[0079]
The seat body may be divided into a plurality of front and rear parts, and each part may be connected in a relatively bendable state (also in this case, the seat body is pushed backward as a whole by the auxiliary interlocking mechanism).
[Brief description of the drawings]
FIG. 1 is a front view of a chair according to an embodiment.
FIG. 2 is a right side view of the chair.
FIG. 3 is a longitudinal side view in a neutral state.
FIG. 4 is a vertical side view in a locked state.
FIG. 5 is an exploded perspective view of the seat receiver 2 and the intermediate support.
FIG. 6 is a separated perspective view of the seat receiver 2 and the intermediate support as viewed from the front.
FIG. 7 is an exploded perspective view of the seat receiver 2 and the intermediate support as viewed from the lateral direction.
FIG. 8 is a perspective view of the intermediate support body in an inverted state.
FIG. 9 is a perspective view of the intermediate support as viewed from above.
FIG. 10 is a cutaway perspective view of a seat substrate.
FIG. 11 is a partial front sectional view of a seat portion.
12 is a cross-sectional view taken along line XII - XII in FIG.
FIG. 13 is a side sectional view showing the relationship between the upper and lower locking bodies.
[Brief description of symbols]
DESCRIPTION OF SYMBOLS 2 Seat support body 3 Intermediate support body 4 Seat body 5 Backrest 6 Back support frame 7 1st support shaft 8 2nd support shaft 9 3rd support shaft 10 Elongate hole 17 Torsion coil spring 30 Cam body 31 which comprises a tilt range adjustment mechanism Cam receiver constituting tilting range adjusting mechanism 37 Upper locking body of locking mechanism 38 Lower locking body of locking mechanism 48 Link body as an example of operating body in auxiliary interlocking mechanism 49 Guide shaft 50 Guide groove as an example of guide means 52 Engagement holes in the seat

Claims (3)

A seat receiver attached to the leg, an intermediate support disposed above the seat receiver, a seat attached to the intermediate support so as to be movable relative to the front and rear, and a rear tiltable to the seat receiver A back support frame that is connected and to which a backrest is attached; and a spring means that elastically supports a rearward tilt of the back support frame;
Said seat receiving member and the intermediate support and the back support frame, an intermediate support is coupled to the retraction and rearward tilting movement be so that in conjunction with the tilting after the back support frame,
A link body having an upper end engaged with a seat body is connected to the intermediate support body. On the other hand, when the back support frame tilts backward, the link body moves in a direction in which the upper end moves backward. Guide means for guiding to rotate is provided, and when the back support frame tilts backward, the upper end of the link body is set to move backward at a larger rate than the intermediate support body.
In the configuration
The front part of the intermediate support and the seat support are connected by a first horizontal support shaft, and the front part of the back support frame and the seat support are connected by a second horizontal support shaft. The rear part of the support body and the back support frame are connected by a horizontal horizontal third support shaft, and the first support shaft and the hole into which the first support shaft is fitted are set as a set of a slide shaft and a long hole, so that The support body is configured to move backward and backward in conjunction with the rearward tilt of the back support frame, and the link body is fitted to the first support shaft.
Rocking chair. The seat is attached to the intermediate support in a state in which the front-rear position can be adjusted.
The rocking chair according to claim 1. The seat body is provided with a plurality of engaging portions in which the upper end portion of the link body is fitted in the front-rear direction so that the upper end portion of the link body cannot be displaced forward and backward. It is designed to be lifted up to the point where the part disengages from the link body.
The rocking chair according to claim 2 .

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