JP3661603B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair whose seat moves in the front-rear direction, and more particularly to a chair that is always elastically biased so that the seat slides forward.
[0002]
[Prior art]
Conventionally, various types of chairs that are always elastically biased so that the seat moves in the front-rear direction with respect to the legs and the seat slides forward are provided. For example, in Japanese Utility Model Publication No. 50-15767, a plurality of rollers project in the front-rear direction on both left and right sides of the mounting body provided at the upper end of the leg portion, and the left and right sides of the receiving body provided on the lower surface of the seat portion. There is disclosed a chair in which a support rail capable of rolling a roller is provided and a receiving body is elastically biased forward with respect to the mounting body.
[0003]
However, in order to support the entire load of the seat only with the roller, it is necessary to disperse the load applied to one roller by arranging a large number of the rollers in the front-rear direction. Durability issues still remain. In addition, since a large number of rollers are arranged in the front-rear direction, the front-rear dimension of the mounting body is increased, and if it is intended to secure a sufficient stroke for the back-and-forth movement of the seat, the front-rear dimension of the receiver can be increased accordingly. It must be. That is, the drive mechanism becomes large.
[0004]
Therefore, as disclosed in Japanese Utility Model Registration No. 3016453, instead of rollers, sliders that are long in the front-rear direction are provided on both sides of the mounting body so as to slide within the support rail provided on the receiving body. A chair having a structure in which the load of the seat portion is received by a slider has also been proposed. In this case, since the slider does not have a rotating mechanism such as a roller, the problem of strength is solved, and there is an advantage that the front and rear dimensions of the mounting body and the receiving body can be reduced.
[0005]
However, when sitting on the seat part, usually the upper end of the backrest part is slid backward against the elastic biasing force. At this time, the force is applied to the sliding direction of the slider and the support rail. Since the point of action is far away, the moment acts so that the seat and backrest tilt backward, so the front end of the slider is strongly pressed against the lower plate of the support rail, while the rear end of the slider Is strongly pressed against the upper plate of the support rail, causing a twist between the slider and the support rail, thereby preventing smooth back-and-forth movement of the seat.
[0006]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem that in a chair that is always elastically urged so that the seat slides forward, the seat is slid backward with the upper end of the backrest. The object is to provide a chair capable of smoothly performing movement when moved.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is a chair that is always elastically biased so that the seat moves in the front-rear direction with respect to the legs and slides forward. Sliders are provided on both the left and right sides of the mounting body provided at the upper end of the seat, and support rails are provided on both the left and right sides of the receiving body provided on the lower surface of the seat portion. An auxiliary rail having a lower plate is provided, the receiving body is elastically biased forward with respect to the mounting body, and a roller that can swing up and down on both the left and right sides of the mounting body can roll within the auxiliary rail. In addition, the chair is configured such that the roller is elastically biased in a direction in which the seat portion and the backrest portion are inclined forward, and is pressed against the upper plate or the lower plate of the auxiliary rail.
[0008]
Here, at each of the front and rear portions of the mounting body, a posture control member provided with rollers on both right and left sides is provided so as to be able to swing up and down, and the front posture control member is pressed against the lower plate of the auxiliary rail. More preferably, the mounting body is elastically biased, and the posture control member on the rear side is elastically biased against the mounting body so that the roller is pressed against the upper plate of the auxiliary rail.
[0009]
Specifically, the attachment body is provided with sliders protruding laterally at the left and right upper edges of the box-shaped main body portion, and the front posture control member is erected with the connecting plate along the bottom surface and both side surfaces of the main body portion. And a roller attached to the outside of the front end portion of the co-raising plate, and the rear portion of the co-raising plate is attached to the side surface of the main body portion so as to be able to swing up and down with a horizontal shaft, and further than the shaft A compression spring is interposed between the bottom surface of the main body portion and the connection plate at the front position, and the rear posture control member has a connection plate and an upright plate along the bottom surface and both side surfaces of the main body portion, and is compatible with each other. A roller is attached to the outside of the rear end portion of the plate, and the front and rear central portions of the co-raising plate are attached to the side surface of the main body portion so as to be able to swing up and down with a horizontal support shaft, and are further forwardly positioned than the support shaft. A compression spring is interposed between the bottom surface of the main body and the connecting plate.
[0010]
The receiving body forms a space for receiving the mounting body between both side plates, and supports and slides the support rail that slides the slider on the inner surface side of the side plates and the auxiliary rail that rolls the roller. It is provided in parallel with.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows a chair according to the present invention, and FIGS. 2 to 6 show the details thereof, in which 1 is a leg, 2 is a seat, 3 is a backrest, 4 is a mounting body, and 5 is a receiving body. Respectively. In the figure, symbol F indicates the front side and symbol B indicates the rear side.
[0012]
The chair according to the present invention is a chair that is always elastically biased so that the seat 2 moves in the front-rear direction with respect to the leg 1 and the seat 2 slides forward. Long sliders 6 and 6 are provided on the left and right sides of the mounting body 4 provided at the upper end, and the sliders 6 and 6 are slidable on the left and right sides of the receiving body 5 provided on the lower surface of the seat 2. 7, an auxiliary rail 8 having an upper plate 8 </ b> A and a lower plate 8 </ b> B is provided along the support rail 7, and the receiving body 5 is elastically urged forward with respect to the mounting body 4. The rollers 9, 9 provided on the left and right sides of the roller 9, can be rotated in the auxiliary rail 8, and the roller 9 is elastically biased in the direction in which the seat 2 and the backrest 3 are inclined forward. Then, the auxiliary rail 8 is pressed against the upper plate 8A or the lower plate 8B. The slider 6 may be a plurality of short sliders arranged in the front-rear direction.
[0013]
In the minimum configuration of the present invention, when the pair of left and right rollers 9, 9 are provided only on the rear end portion of the mounting body 4, the upper plate 8A of the auxiliary rail 8 is pressed against the roller 9 and the seat portion 2 and the backrest 3 are elastically biased in the forward tilting direction, thereby canceling a backward tilting moment generated when the seat 2 is slid backward with the upper end of the backrest 3, and the seat 2 The smooth rearward movement is realized. Alternatively, when the pair of left and right rollers 9 and 9 are provided only at the front end portion of the attachment body 4, the lower plate 8 </ b> B of the auxiliary rail 8 is pressed against the roller 9. It has been experimentally confirmed that when the pair of left and right rollers 9, 9 are provided on the attachment body 4, the effect is greater at the rear end portion than at the front end portion of the attachment body 4. . However, it is clear that it is more effective to provide two pairs of rollers on each of the front and rear portions of the mounting body 4. In the following embodiment, a structure in which two pairs of rollers are provided on the front and rear portions of the mounting body 4 will be described.
[0014]
As shown in FIG. 2 to FIG. 6, posture control members 10, 11 provided with rollers 9,... The member 10 is elastically biased with respect to the mounting body 4 so that the rollers 9 and 9 are in pressure contact with the lower plate 8B of the auxiliary rail 8, and the rear posture control member 11 is configured such that the rollers 9 and 9 have the rollers 9 and 9 The mounting body 4 is elastically biased so as to be pressed against the upper plate 8A.
[0015]
More specifically, as shown in FIGS. 2 and 3, the mounting body 4 is formed with flange portions 13, 13 on the left and right upper edges of the box-shaped main body portion 12, and laterally formed on the flange portions 13, 13. Sliders 6 and 6 are fitted so as to protrude. The main body 12 of the mounting body 4 is formed by bending side plates 15 and 15 upward on both sides of the bottom plate 14 and bending the flange portions 13 and 13 outwardly at the upper edges of the side plates 15 and 15. Further, the fixing plate 16 is fixed to the upper part between the side plates 15 and 15, and the upper ends of the pillars 18 constituting the leg portion 1 are inserted into the openings 17 and 17 formed in the bottom plate 14 and the fixing plate 16. It is connected by welding. Here, in the present embodiment, the pedestal 18 is fixed to the floor surface in a forward inclined state, and the attachment body 4 is fixed substantially horizontally to the upper end thereof. However, the pedestal 18 may be vertical.
[0016]
The front posture control member 10 is a front-viewed U-shape having a connecting plate 19 and standing plates 20, 20 along the bottom plate 14 and both side plates 15, 15 of the main body 12. , 20 are attached to the outer side of the front end of the roller 20, and the rear portions of the co-raising plates 20, 20 are attached to the side plates 15, 15 of the main body 12 so as to be swingable up and down by horizontal support shafts 21, respectively. Compression springs 22 and 22 are interposed between the bottom plate 14 and the connecting plate 19 of the main body 12 at a position forward of the support shaft 21. On the other hand, the posture control member 11 on the rear side is a front-viewed U-shape having a connecting plate 23 and rising plates 24, 24 along the bottom plate 14 and both side plates 15, 15 of the main body 12. , 24 can be mounted on the outer side of the rear end portion thereof, and the front and rear central portions of the compatible raising plates 24, 24 can be vertically swung on the side plates 15, 15 of the main body portion 12 by a horizontal support shaft 25, respectively. In addition, compression springs 26 and 26 are interposed between the bottom plate 14 and the connecting plate 23 of the main body 12 at a position in front of the support shaft 25. In this embodiment, a helical spring is used as the compression springs 22 and 26 so as to be mounted in a narrow space. However, a leaf spring or a rubber sheet is used, and further, the bottom plate 14 of the main body 12 is used. When a sufficiently large space can be secured between the connecting plates 19 and 23, a normal compression coil spring may be used. Furthermore, although a tension coil spring may be used, in that case, it is provided on the opposite side to the compression spring with respect to the support shaft.
[0017]
As shown in FIGS. 2 and 4, the receiver 5 has a mounting plate 27 on the lower surface of the seat 2 at the top, and both side plates 28, 28 downward on the left and right sides of the mounting plate 27. , And a space for receiving the mounting body 4 is formed between the side plates 28, 28, and the support rail 7 that slides the slider 6 on the inner surface side of the side plates 28, and the rollers 9,. The auxiliary rail 8 which moves is provided in parallel up and down. Specifically, a U-shaped support rail 7 having a concave groove facing inward is fixed to a position along the lower surface of the mounting plate 27 at the upper end on the inner surface side of the side plate 28. The slider 6 is slidably received in the groove so that it can slide back and forth. Further, a lower plate 8B of the auxiliary rail 8 is formed by bending inwardly at the lower edge of the side plate 28, and the lower plate of the support rail 7 is formed as an upper plate 8A of the auxiliary rail 8, The auxiliary rail 8 is configured to receive and roll the rollers 9.
[0018]
Further, the portions near the center of the connecting plates 19 and 23 of the front and rear attitude control members 10 and 11 form notches 29 and 30 for receiving the legs 1, respectively. 4 to 6, the sliders 6 and 6 are slidably engaged with the support rails 7 and 7, and the rollers 9 and 9 on both sides are inserted into the auxiliary rails 8 respectively. Between the bottom plate 14 and the fixed plate 16 on both sides of the pedestal 18 of the leg portion 1, a front plate 31 erected at the front end of the bottom plate 14 of the mounting body 4, and the rear of the mounting plate 27 of the receiver 5. A pair of tension coil springs 33, 33 having end portions engaged with a rear plate 32 hanging from the ends are disposed, and the receiving body 5 (seat portion 2) is always forward with respect to the mounting body 4. It is elastically biased. Here, it is preferable that the elastic biasing direction by the tension coil spring 33 and the sliding direction by the slider 6 and the support rail 7 are substantially matched to realize a smooth operation. The mounting body 4 and the receiving body 5 are covered with a cover 34.
[0019]
As shown in FIG. 5, the seat portion 2 is normally located in the forefront by the elastic biasing force of the tension coil springs 33 and 33. In this state, the both side rollers 9 and 9 of the front posture control member 10 press the lower plate 8B of the auxiliary rail 8 by the elastic urging force of the compression springs 22 and 22, and both side rollers 9 and 9 of the rear posture control member 11 are pressed. 9 presses the upper plate 8A of the auxiliary rail 8 by the elastic biasing force of the compression springs 26, 26, and is elastically biased in the direction in which the seat 2 and the backrest 3 tilt forward. Here, “the direction in which the backrest 3 is tilted forward” means the direction in which the backrest 3 is literally tilted forward, and “the direction in which the seat 2 is tilted forward” is the direction of the seat 2 It means the direction in which the front part is inclined downward and the direction in which the rear part of the seat part 2 is inclined upward. When the seat 2 is seated, if it is pulled backward by holding the upper end of the backrest 3, the seat 2 resists the elastic biasing force of the tension coil springs 33, 33 as shown in FIG. In this case, the force applied to the backrest part 3 acts in a direction in which the seat part 2 and the backrest part 3 are tilted backward, and the seat part 2 moves in the direction of the arrow P in the figure. Although a couple of forces (indicated by arrows G in the figure) is generated to counteract the front and rear posture control members 10 and 11, the slider 6 is supported by the support rail 7. Since the sliding movement is performed without pressing the upper and lower plates, the operation becomes extremely smooth.
[0020]
In the embodiment described above, the attachment body 4 is fixed to the leg portion 1 and the seat portion 2 simply slides back and forth without rotating, but as shown in FIG. 7 or FIG. It is also preferable to combine with a mechanism for rotating the seat portion 2. Here, if the slide mechanism of the seat 2 is S and the rotation mechanism is R, the chair shown in FIG. 7A has the slide mechanism S attached to the leg 1 via the rotation mechanism R. The seat 2 is attached to the slide mechanism S. Further, the chair shown in FIG. 8A has a structure in which the rotation mechanism R is attached to the leg portion 1 via the slide mechanism S, and the seat portion 2 is attached to the rotation mechanism R. The operation | movement which combined the slide and rotation of the chair of each structure is shown in FIG.7 (b) and FIG.8 (b). The operation of each chair is slightly different, and the chair of FIG. 7 is an operation in which the center line of the seat 2 always passes through the center of the leg 1, but the chair of FIG. It is allowed to operate so as to be eccentric. Which structure is easier to sit on depends on the distance between the front and rear tables T and the distance between the left and right chairs.
[0021]
Further, FIG. 9 shows a combination of a table T having a structure in which a curved edge 35 is formed by bending a front edge of a top plate corresponding to a chair so as to be easily seated, and the chair according to the present invention. The structure is shown. Furthermore, the rear edge of the top plate of the table T at the rear part of the chair may be similarly curved and recessed, and in this case, it becomes easy to pass through the gap between the rear part of the chair and the rear table T.
[0022]
【The invention's effect】
According to the chair of the present invention configured as described above, in the chair that is always elastically biased so that the seat portion slides forward, the slide mechanism comprising the slider and the support rail having high support strength and excellent durability. In spite of the adoption of this, the operation of sliding the seat portion backward by holding the upper end portion of the backrest portion when sitting can be performed very smoothly.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a chair according to the present invention.
FIG. 2 is an exploded perspective view showing a slide mechanism.
FIG. 3 is an exploded perspective view showing an attachment body and a posture control member.
FIG. 4 is a longitudinal front view of the slide mechanism in an assembled state.
FIG. 5 is a longitudinal side view of the slide mechanism in a state where the seat portion is also located at the forefront.
FIG. 6 is a longitudinal side view of the slide mechanism in a state where the seat portion is also located at the rearmost position.
7A and 7B show another embodiment of a chair in which a slide mechanism and a rotation mechanism are combined. FIG. 7A is a simplified side view of the chair, and FIG. 7B is a simplified plan view showing the relationship between the table and the chair.
8A and 8B show still another embodiment of a chair in which a slide mechanism and a rotation mechanism are combined. FIG. 8A is a simplified side view of the chair, and FIG. 8B is a simplified plan view showing a relationship between the table and the chair. .
FIG. 9 is a simplified plan view showing an embodiment in which the top plate of the table is a modified top plate.
[Explanation of symbols]
R rotation mechanism S slide mechanism T table F front B rear 1 leg 2 seat 3 backrest 4 mounting body 5 receiver 6 slider 7 support rail 8 auxiliary rail 8A upper plate 8B lower plate 9 roller 10 forward posture control Member 11 Rear posture control member 12 Body portion 13 Flange portion 14 Bottom plate 15 Side plate 16 Fixing plate 17 Opening 18 Leg column 19 Connecting plate 20 Standing plate 21 Support shaft 22 Compression spring 23 Connecting plate 24 Standing plate 25 Support shaft 26 Compression Spring 27 Mounting plate 28 Side plate 29, 30 Notch 31 Front plate 32 Rear plate 33 Tension coil spring 34 Cover 35 Curved edge

Claims (4)

A chair that is always elastically biased so that the seat moves in the front-rear direction with respect to the leg, and the seat slides forward, with sliders on both the left and right sides of the mounting body provided at the upper end of the leg A support rail that can slide the slider on the left and right sides of the receiver provided on the lower surface of the seat, and an auxiliary rail having an upper plate and a lower plate along the support rail. The support body is elastically biased forward with respect to the body, and a roller provided on the left and right sides of the mounting body so as to be able to swing up and down is allowed to roll within the auxiliary rail. A chair characterized by being elastically biased in a direction in which the section is inclined forward and pressed against the upper or lower plate of the auxiliary rail. At the front and rear parts of the mounting body, posture control members provided with rollers on the left and right sides are provided so as to be able to swing up and down, and the front posture control member is mounted so that the rollers are pressed against the lower plate of the auxiliary rail. The chair according to claim 1, wherein the chair is elastically urged against the body, and the posture control member on the rear side is elastically urged against the attachment body so that the roller presses against the upper plate of the auxiliary rail. The mounting body is provided with sliders protruding laterally on the left and right upper edges of the box-shaped main body, and the front posture control member has a connecting plate and a rising plate along the bottom surface and both side surfaces of the main body. In addition, a roller is attached to the outer side of the front end portion of the compatible raising plate, and the rear portion of the compatible raising plate is attached to the side surface of the main body portion so as to be able to swing up and down with a horizontal support shaft. A compression spring is interposed between the bottom surface of the main body portion and the connecting plate, and the rear posture control member has a connecting plate and a standing plate extending along the bottom surface and both side surfaces of the main body portion, and the rear end portion of the compatible raising plate A roller is attached to the outside, and the front and rear central portions of the co-raising plate are attached to the side surface of the main body portion so as to be able to swing up and down by a horizontal support shaft. The chair according to claim 1 or 2, wherein a compression spring is interposed between the connecting plate and the connecting plate. The receiver forms a space for receiving the mounting body between both side plates, and a support rail that slides the slider on the inner surface side of the side plates and an auxiliary rail that rolls the roller are vertically parallel. The chair according to any one of claims 1 to 3, wherein the chair is provided.

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