JP3574336B2 - Back-standing interlocking chair - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sitting-type chair used in public facilities and the like, and more particularly to a sitting-type sitting chair in which a back is interlocked with a seat and folded up. The present invention relates to a stand-up chair provided with a damper so that the seat and the back can be folded slowly so as to gently hit each other when the user is separated.
[0002]
[Prior art]
As the seat-standing chair as described above, for example, the chair disclosed by the present applicant in Japanese Patent Application Laid-Open No. H10-155587 is conventionally known, and this chair has two standing chairs on the floor. , And a seat and a back located between the posts, and the seat pivots an intermediate portion between front and rear ends of both sides thereof to an intermediate portion between upper and lower ends of the posts on both sides. The back can pivot between a substantially horizontal use position and a substantially vertical upright position, and the back pivots the lower ends of both sides to the rear ends of both sides of the seat. And a middle part between upper and lower ends of both sides thereof is connected to upper ends of the pillars on both sides through first link members, respectively, and the first link member and a side part of the seat are connected. And a four-bar linkage on each side of the back with the support and the side of the back, In the back-standing interlocking seat-type chair, which is interlocked with the seat, a mounting bracket protruding a cylindrical holder is provided on at least one side of the back, and the cylindrical holder is the first link member to the back. The rotary shaft protruding from the main body of the rotary damper is disposed and fixed so as to be displaced in the longitudinal direction of the back from the connection position of the rotary damper, and the main body of the rotary damper is accommodated and fixed in the cylindrical holder. , One end of the second link member is connected to the second link member, and the fitting portion provided at the other end of the second link member is inserted into the elongated hole formed in the first link member. It is fitted so that it can slide in the direction.
[0003]
In such an upright chair, when the first link member rotates with respect to the back when the back and the seat are erected in conjunction with the four-bar linkage mechanism, the first link member with respect to the back is rotated. Since the distance between the rotary damper housing and fixing the main body in the cylindrical holder positioned off the longitudinal direction of the back from the connection position and the long hole of the first link member changes, the rotation of the rotary damper changes. While the fitting portion at the other end of the second link member having one end coupled to the shaft slides in the elongated hole of the first link member with the rotation of the first link member, The rotary shaft rotates around the rotation axis of the rotary damper, whereby the rotary shaft rotates while being braked with respect to the main body of the rotary damper, thereby slowing down the movement of the back and the seat in conjunction with each other. And seat gently against each other Therefore, according to this seat-standing chair, it is possible to prevent the generation of noise due to the collision between the back and the seat when the occupant leaves.
[0004]
[Problems to be solved by the invention]
The inventor of the present invention has further studied the above-mentioned conventional sitting-type chair, and as a result, the following points, which are desirable to be improved, have been found. That is, in the above-mentioned conventional sitting-type chair, since the cylindrical holder protrudes from the side of the spine, there is a gap between the spine and the strut, and the gap between the spine and the strut is different. And the width of the first link member cannot be sufficiently widened. In addition, it is necessary to provide a second link member in addition to the first link member, and it is necessary to form an elongated hole in the first link member. There was a disadvantage that the cost increased.
[0005]
[Means for Solving the Problems and Their Functions and Effects]
SUMMARY OF THE INVENTION An object of the present invention is to provide a seat-standing chair that advantageously solves the above-described problems, and a back-seat interlocking seat-standing chair according to the present invention includes two columns, The seat includes a seat and a back located between the columns, and the seat is rotatably supported at an intermediate portion between front and rear ends of both sides thereof at intermediate portions between upper and lower ends of the columns on both sides so as to be rotatable. The back can rotate between a horizontal use position and a substantially vertical standing position, and the back is rotatably connected at a lower end thereof to a rear end of the seat via a connection shaft. The intermediate portion between the upper and lower ends of both sides is connected to the upper end of the column on both sides via a link member, and the link member, the side of the seat, the column, and the side of the spine support the back. A four-bar link mechanism is configured on each side of the seat and interlocks with the seat. There are, along with coupling the connecting shaft to the rear portion of the seat, the damper housing part provided at the lower end of the back, in the damper housing part, the relative times between the connecting shaft and the back of the lower portion A damper for damping the movement is accommodated.
[0006]
In such a seat-standing chair, when the back and the seat are erected in conjunction with each other by the four-bar linkage, when the lower end of the back and the rear end of the seat are relatively rotated around the connection axis, the seat is raised. connecting shaft coupled to the rear end portion of pivots against the back of the lower portion, and dampers brake the relative rotation between the coupling shaft and the lower end portion of the back, interlocking the back and the seat The folding movement is slow, so that the back and seat gently touch each other. Therefore, according to this seat-standing chair, it is possible to prevent the generation of noise due to the collision between the back and the seat when the occupant leaves.
[0007]
Moreover, according to the upright chair of the present invention, the lower end of the back has little or no effect on the comfort of the occupant, rather than projecting the cylindrical holder from the side of the back and housing the damper there. Since the damper housing part is provided in the part and the damper is housed in it, the width of the back can be sufficiently widened for the interval between the two pillars without impairing the comfort of the occupant, In addition, since there is no need to provide a second link member and to form an elongated hole in the original link member, the manufacturing cost of the chair can be reduced.
[0008]
In the present invention, as the damper, a linear actuation type damper operated by an arm member, a cam member, or the like provided on a connection shaft may be used, but more preferably, as the damper, a main body and a main body, Using a rotary damper (rotationally actuated damper) having a rotating shaft that protrudes and is rotated against the body, the body is connected to the lower end of the back , and the rotating shaft is connected to the connecting shaft. Combine with axis. With this configuration, the rotary damper can be formed to have a relatively compact external dimension, and the accommodation portion for accommodating the rotary damper can be small, so that the cushion material can be sufficiently provided at the lower end of the back and the comfort of the chair can be improved. And the appearance of the chair can be improved.
[0009]
Here, as the above-mentioned rotary damper, for example, a viscous damper type in which high-viscosity grease is filled in a slight gap between a base of a rotation shaft located in a cylindrical main body and an inner peripheral surface of the main body. The oil may be filled between the base of the rotating shaft located in the main body and the inner peripheral surface of the main body, and the oil may flow through the rotating shaft, and the flow resistance of the oil may be used. Alternatively, an oil damper type that brakes the rotating shaft may be used.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail by way of examples with reference to the drawings. 1 (a) and 1 (b) are a front view and a side view, respectively, showing an embodiment of a back-seat-linked seat-standing type chair according to the present invention in a state in which a seat and a back are located at a use position. 2 (a) and (b) are front and side views showing the upright chair of the embodiment with the seat and back in the upright position, and FIGS. 3 (a) and (b) are FIG. 4 is an exploded perspective view showing the structure of the portion around the damper of the upright chair according to the embodiment, as viewed from obliquely outward and obliquely above, respectively. FIG. 4 is a damper of the upright chair according to the embodiment. It is an expanded sectional view which shows a surrounding part.
[0011]
In FIG. 1 (a) and FIG. 2 (a), a plurality of the back-seat interlocking sitting-type chairs 1 are connected in a left-right direction in FIG. It constitutes a connecting chair used in a public facility or the like, and comprises two columns 4 whose lower ends are supported by a connecting tube 3, a seat 5 and a back 6 located between the columns 4, and An elbow 7 is provided at the upper end of the support 4.
[0012]
In this chair 1, the seat 5 is rotatably supported via a support shaft 8 at an intermediate position between the front and rear ends of both sides thereof at an intermediate position between the upper and lower ends of the columns 4 on both sides. 1 (a) and 1 (b), and a substantially vertical standing position shown in FIGS. 2 (a) and 2 (b). The lower ends of both sides are rotatably connected to the rear ends of both sides of the seat 5 via a connection shaft 9, and the intermediate position between the upper and lower ends of the both sides is connected to the link member 10 and the both ends thereof, respectively. It is connected to the upper ends of the pillars 4 on both sides via the shafts 11 and 12, and the link member 10, the side of the seat 5, the pillar 4 and the side of the back 6, and four-side links on both sides of the back 6. It constitutes a mechanism and interlocks with the seat 5, and when the seat 5 is located in the above-mentioned use position, it tilts backward as shown in FIG. While located in use position, the seat 5 is in the state of together with the seat 5 positioned substantially vertical upright position as shown in Figure 2 when positioned in the standing position [0013]
Further, in this chair 1, the elbow 7 is rotatable between a substantially horizontal use position shown in FIG. 1 and an upright position shown in FIG. The support member 2 is supported by the upper end portion of the support column 2 via a support 11 and is constantly urged toward a standing position by a spring (not shown), and can be engaged with and separated from the link member 10 on the back surface. As a result, as shown in FIG. 1, when the seat 5 is moved from the standing position to the use position together with the back 6 by the seated person, and the link member 10 connected to the back 6 rotates from the substantially vertical position to the substantially horizontal position, as shown in FIG. In addition, the elbow 7 whose rear surface is pushed by the link member 10 rotates together with the link member 10 to a substantially horizontal use position against the spring, and the seated person separates from the seat. 5 starts from the use position with the back 6 When the link member 10 connected to the back 6 rotates from the substantially horizontal position to the substantially vertical position, the elbow 7 is moved to the link member 10 by the urging force of the spring, as shown in FIG. Together, they pivot into a generally vertical upright position with the rear end down, aligned with the seat 5 and the back 6.
[0014]
By the way, as shown in FIG. 1, a seat arm 13 made of a plate material is fixed to both sides of the seat 5 of the chair 1 so as to extend from an intermediate portion to a rear end thereof, as shown in FIG. As described above, the support shaft 8 and the connection shaft 9 project from the seat arm 13 in opposite directions, and the seat arm 13 also engages with the inner surface of the upper end of the space 4a formed in the support column 4. A stopper shaft 14 for restricting the rotation limit position of the lever seat 5 to the use position is also protruded.
[0015]
On the other hand, on both sides of the back 6 of the chair 1, as shown in FIG. 1, a back support 15 made of a plate material is fixed so as to extend from an intermediate portion to a lower end portion. As shown, the connecting shaft 12 is protruded from the back feed 15 and the connecting shaft 9 is provided on one side of the back 6 (the right side in FIGS. 1A and 2A). The back feed 15 is rotatably supported via a bush 16 and connected via a rotary damper 17 as a rotary actuated damper. On the other side of the back 6, the bush 16 is simply attached to the back feed 15. It is supported rotatably through the.
[0016]
Here, the rotary damper 17 fills a slight gap between the base of the rotating shaft 17b located inside the cylindrical main body 17a and the inner peripheral surface of the main body 17a with high-viscosity grease, and This is a conventional viscous damper type in which the relative rotation with respect to the rotation shaft 17b is damped by the grease. As shown in FIGS. The main body 17a of the rotary damper 17 is provided with a projecting ridge 17c projecting from the rear end thereof and extending in a direction orthogonal to the axis of the damper. It is fitted into a groove 18a formed in the bottom of the case 18 and is prevented from rotating with respect to the damper case 18, and the rotating shaft 17b of the rotary damper 17 has Made is to be detent to the connecting shaft 9 a flat portion 17d is fitted into the groove 9a formed on the connecting shaft 9 extending in the direction perpendicular to the axis of the damper.
[0017]
At the lower end of one side of the seat 6 (the right side in FIGS. 1A and 2A), the damper case 18 is accommodated, as shown in FIG. A cushion material non-filling portion 6a as a damper accommodating portion is provided.
[0018]
In the chair 1 according to this embodiment, when the back 6 and the seat 5 stand in conjunction with each other by the four-bar linkage mechanism, the lower end of the back 6 and the rear end of the seat 5 move relative to each other around the connection shaft 9. When rotated, the connecting shaft 9 connected to the rear end of the seat 5 via the seat arm 13 rotates with respect to the lower end of the back 6, and the lower end of the back 6 and the connecting shaft 9 The relative rotation between them is braked by the rotary damper 17, so that the movement of the back 6 and the seat 5 being folded together is slowed down, so that the back 6 and the seat 5 gently hit each other. Therefore, according to the sitting-type chair 1 of this embodiment, it is possible to effectively prevent the generation of noise due to the collision between the back 6 and the seat 5 when the occupant leaves.
[0019]
Moreover, according to the upright chair 1 of this embodiment, the cylindrical holder does not protrude from the side of the back and accommodates the damper therein, and the back has little or no effect on the comfort of the occupant. Is provided with a cushion material non-filling portion 6a at the lower end thereof, and accommodates the damper case 18 and the damper 17 therein. Can be sufficiently widened, and there is no need to additionally provide a second link member and form an elongated hole in the original link member, so that the manufacturing cost of the chair can be reduced.
[0020]
Further, according to the upright chair 1 of this embodiment, as the damper, the rotary damper 17 having the main body 17a and the rotating shaft 17b protruding from the main body 17a and braking the rotation with respect to the main body 17a is used. In use, the main body 17a is connected to the lower end of the back 6 through the back support feed 15, and the rotating shaft 17b is connected to the connecting shaft 9. Therefore, the rotary damper 17 is relatively Since the cushion material non-filled portion 6a for accommodating the compact external dimensions can be made small, the cushion material can be sufficiently provided at the lower end of the back 6, so that the comfort of the chair can be further improved. Also, the appearance of the chair can be improved.
[0021]
As described above, the present invention has been described based on the illustrated example. However, the present invention is not limited to the above-described example. For example, in the above-described embodiment, the damper is provided only on one side of the back, it may be provided a damper on both sides of the back depending on the etc. required. In the above embodiment, a viscous damper type rotary damper is used. However, an oil damper type rotary damper or a linear actuation type damper may be used. Can of course be used for independent chairs.
[Brief description of the drawings]
FIGS. 1 (a) and 1 (b) are a front view and a side view showing an embodiment of a back-standing interlocking seat-type chair according to the present invention with a seat and a back positioned at a use position.
FIGS. 2 (a) and (b) are a front view and a side view, respectively, showing the upright chair of the above embodiment in a state in which a seat and a back are in an upright position.
FIGS. 3 (a) and 3 (b) are exploded perspective views showing the structure of a portion around a damper of the upright chair according to the above-described embodiment, as viewed from obliquely upper and lower sides, respectively.
FIG. 4 is an enlarged sectional view showing a part around a damper of the upright chair according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chair 2 Leg 3 Connecting pipe 4 Post 5 Seat 6 Back 6a Cushion material non-filling part 9 Connecting shaft 9a Groove 10 Link member 13 Seat arm 15 Back carrying feed 17 Rotary damper 17a Main body 17b Rotating shaft 17c Ridge 17d Flat portion 18 Damper case 18a Groove

Claims (2)

Comprising two posts (4), a seat (5) and a back (6) located between the posts,
The seat is rotatably supported at an intermediate portion between the front and rear ends of both side portions thereof at an intermediate portion between upper and lower ends of the support columns on both sides, and is located between a substantially horizontal use position and a substantially vertical standing position. Can be turned,
The back has a lower end rotatably connected to a rear end of the seat via a connection shaft (9), and an intermediate portion between upper and lower ends of both sides of the back is provided on both sides via link members. The link member, the side of the seat, the support and the side of the back thereof constitute a four-bar link mechanism on both sides of the back, and interlock with the seat. , In the back-linked seat-standing chair,
The connection shaft is connected to a rear end of the seat (5), and a damper housing (6a) is provided at a lower end of the back (6) .
A backrest-linked seat-standing chair, wherein a damper (17) for braking relative rotation between a lower end portion of the back and the connection shaft is housed in the damper housing portion. As the damper, a rotary damper (17) having a main body (17a) and a rotation shaft (17b) projecting from the main body and braking the rotation with respect to the main body is used,
While coupling the main body to the lower end of the back ,
The backrest-linked seat-standing chair according to claim 1, wherein the pivot shaft is coupled to the connection shaft.

Images