JPH0787807B2 - Chair - Google Patents

Description

TECHNICAL FIELD The present invention relates to a chair suitable for being installed and used in a theater, an auditorium, or other various halls, and particularly, to changing the form of the backrest part thereof. Thus, the present invention relates to a chair that can be used as a desk by a seated person in the rear seat.

[Prior Art] A large number of chairs installed in theaters are arranged at intervals suitable for viewing plays and the like, but with this alone, notes are taken at lectures and meetings. It is inconvenient because there is no place.

Therefore, recently, for example, as shown in Japanese Patent Publication No. 61-30564, by tilting the backrest, a seated person in the rear seat can use the backside of the backrest as a desk top. Chairs have been developed. That is, this chair is one in which left and right columns are projected from the seat receiving portion, and the entire backrest is continuously connected to the columns via a four-point link mechanism. The backrest can be freely rotated with respect to the obtained horizontal position.

[Problems to be Solved by the Invention] However, such a conventional product has a problem that the number of parts is large and the structure is complicated because two sets of left and right four-point link mechanisms are required. In addition, since the link member of the 4-point link mechanism has to be exposed to the outside,
Not only is it unfavorable in appearance, but there is also a problem that the link member and its connecting points are easily touched by the user's clothing or the like, and are easily damaged or dirty.

The present invention aims to solve such problems.

[Means for Solving the Problems] The present invention adopts the following configuration in order to achieve such an object.

That is, the chair according to the present invention comprises a lower back plate which constitutes the lower half of the backrest and a lower back plate which is flush with the lower back plate so as to constitute the upper half of the backrest. An upper back plate hinged to the plate, a recessed portion provided at a central portion of the upper back plate and opening at least to a lower edge and a back surface side of the upper back plate, and from the lower back plate toward the inside of the recessed portion. A projecting part that protrudes, a top plate with its front edge hinged to the upper edge of the upper back plate, and this top plate can be engaged with and disengaged from the top plate storage position where it is attached to the back of the upper back plate and the lower back plate. And a holding means for holding the upper back plate and a lower surface of the top plate, which is substantially horizontal following the forward tilt of the upper back plate, are supported by the projecting portion at a top plate use position, and the upper back plate further tilts forward or It is characterized by comprising locking means for prohibiting the forward movement of the top plate.

If you want to be able to adjust the holding angle of the top plate when using it as a desk, you can either change the height of the protrusion or adjust the locking position by the locking means. Just configure it.

Also, when it is desired to be able to adjust the height of the top plate when it is used as a desk, the height of the protruding portion can be changed and the locking position by the locking means can be adjusted. do it.

[Operation] With such a configuration, the upper back plate is raised up to a position flush with the lower back plate, and then the top plate hinged to the upper edge of the upper back plate is If it is attached to the upper back plate and the lower back plate and is held at the attached position by the holding means, it can be used as a normal theater chair or the like. At this time, the projecting portion of the lower back plate is set in the recessed portion of the upper back plate.

From this state, when the holding of the top plate by the holding means is released and the upper back plate is tilted forward, the front edge of the hanging top plate moves forward as the upper edge of the upper back plate moves forward. Move to. At that time, since the lower surface side of the top plate is slidably supported by the upper edge portion of the projecting portion, the top plate gradually lowers its front edge and its rear edge rises to approach a horizontal posture. go. Then, when the top plate becomes substantially horizontal, further locking of the upper back plate or further forward movement of the top plate is prohibited by the locking means, and the top plate is held in that posture. for that reason,
In this state, the seated person in the rear seat can use it as a desk.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

In this chair, as shown in FIG. 1, legs 3 are erected on a base 2 fixed on a floor 1, and a beam pipe 4 is provided between the legs 3.
The beam pipe 4, an elbow plate 5, a seat 6, and
The backrest 7 is supported.

As shown in FIG. 1 and FIG. 2, the backrest 7 has a lower back plate 71 forming the lower half thereof and an upper part hinged to the upper edge of the lower back plate 71 to form the upper half thereof. It comprises a back plate 72 and a top plate 73 hinged to the upper edge of the upper back plate.

The lower back plate 71 is fixed to the beam pipe 4 via a bracket 74 in a slightly tilted posture.
A cushion material 71b is attached to 71a.

The upper back plate 72 has the same thickness as the lower back plate 71, and both side portions of the lower edge 72e thereof are as shown in FIG.
It is hinged to the upper edge 71d of the lower back plate 71 via a hinge 75. The upper back plate 72 is hinged to the lower back plate 71 so as to be flush with the lower back plate 71 so that it can be tilted only forward. In the central portion of the upper back plate 72, a lower edge 72e, a front surface 72a, and a concave cutout portion 76 opening to the rear surface 72c are formed, and in the front surface 72a of the upper back plate 72, the concave cutout portion is formed. Cushion material 72b so that 76 is hidden
Is attached.

Note that FIG. 2 is a front view of the backrest 7 with the cushion members 71b, 72b omitted, and in the figure, 71e is a bracket for connecting and fixing the elbow plate 5 to the lower back plate 71. Further, a protrusion 77 having a shape corresponding to the recessed portion 76 is integrally provided at the center of the upper edge 71d of the lower back plate 71. Then, when the lower back plate 71 and the upper back plate 72 are erected flush with each other, the protrusion 77 is housed in the recessed portion 76.

The top plate 73 is a plate-shaped body that is longer than the upper back plate 72,
The lower surface 73b side of the front edge 73a is connected to the upper back plate through a hinge 78.
The upper edge 72d of 72 is hinged to the back plate 72c side. In addition, in this embodiment, as shown in FIGS. 3 to 5, a recess 73c slightly wider than the recess 76 is provided on the lower surface 73b of the top plate 73, and both the left and right sides of the recess 73c are provided. A guide rail 73d that opens inward is fixed to the inner surface. Then, a pair of guide pins 7 fixed outwardly at both ends of the upper edge 77a of the protrusion 77.
7b slidably engaged with both guide rails 73d,
The protrusion 77 and the top plate 73 are connected. The length of the guide rail 73d is such that the top plate 73 is substantially horizontal as will be described later from the top plate storage position attached to the rear surfaces 71c and 72c of the lower back plate 71 and the upper back plate 72. The guide pin 77b is set to a dimension such that the guide pin 77b can freely slide up to the plate use position.

Further, inside the guide rail 73d, a locking means 8 for prohibiting the top plate 73 from further moving forward from the position where the top plate is used is provided. The locking means 8 is, for example, as shown in FIG. 4, a block-shaped stopper 81 made of rubber or the like fixed to the rear end of each guide rail 73d. It is designed to lock 77b.

Further, between the top plate 73 and the lower back plate 71, there is provided a holding means 9 for holding the top plate 73 in the top plate storage position in a disengageable manner. The holding means 9 is, for example, as shown in FIG. 1, in which a permanent magnet 91 is embedded in the back surface 71c of the lower back plate 71 and an iron piece 92 is fixedly installed in a corresponding position of the top plate 73. Due to the magnetic attraction of the permanent magnets 91, the top plate 73 can be held at the top plate storage position which is slightly tilted backward.

Thus, the chair A is arranged on the floor 1 in the same manner as a normal theater chair.

With such a structure, the upper back plate 72 is replaced by the lower back plate.
After standing up to a position flush with 71, attach the top plate 73 hinged to the upper edge 72d of the upper back plate 72 to the upper back plate 72.
If it is attached to the back surface of the lower back plate 71 and is held at the top plate storage position by the holding means 9, as shown in the solid line of FIG. 1 and FIGS. 3, 6, and 8, Can be used as a normal theater chair. In this case, the lower back plate 71
The projecting portion 77 of the cushion member 72 is housed in the recessed portion 76 of the upper back plate 72, and the housed state is that of the cushion member 72.
It is completely hidden by b and the top plate 73. for that reason,
Even though it can be used as a desk, there is no discomfort in appearance.

From this state, by pulling the lower end of the top plate 73 rearward, the holding of the top plate 73 by the holding means 9 is released, and the top plate 73 is released.
When the rear edge 73e is tilted forward while rotating the rear edge 73e rearward and upward, the front edge 73a of the top plate 73 moves forward along with the forward movement of the upper edge 72d of the upper back plate 72. To do. At this time, since the guide rails 73d provided on the lower surface side of the top plate 73 are slidably supported by the guide pins 77b provided on the upper edge 77a of the projecting portion 77, the top plate 73 gradually has its front edge 73a. As the trailing edge 73e rises, the trailing edge 73e rises and approaches a horizontal position. Then, when the top plate 73 becomes substantially horizontal, the guide pin 77b comes into contact with the stopper 81 forming the locking means 8, the forward movement of the top plate 73 is prohibited, and the top plate 73 is moved to the top plate 73. Holds in use position. Therefore, in this state, the imaginary line of FIG. 1, FIG. 4, FIG.
As shown in FIG. 7 and FIG. 9, the seated person B in the rear seat is
The chair A can be used as a desk.

In addition, in the embodiment described above, the case where the protruding portion is integrally provided on the lower back plate has been described, but as shown in FIG. 10, the height may be changeably provided. That is,
The one shown in FIG. 10 is provided with a recess 171f on the lower back plate 171 side,
A guide groove 171g is formed on the inner surface of the recess 171f. The protrusion 177 is T-shaped when viewed from the front, and the protrusions 177d that engage with the guide grooves 171g are provided on both side surfaces of the narrow portion 177c.
77c is engaged with the recess 171f of the lower back plate 171 so as to be vertically slidable. Then, an appropriate locking mechanism 177 is attached to the protrusion 177.
e is provided, and the protrusion 177 is provided by the lock mechanism 177e.
So that it can be locked at the desired height position. A guide pin 177b similar to that of the above-described embodiment is provided on the upper edge 177a of the protrusion 177, and the guide pin 177b is used for the top plate 17b.
It is slidably engaged with the guide rail 173d. With such a configuration, by changing the height of the protruding portion 177, it is possible to appropriately adjust the angle of the top plate 173 when locked at the top plate use position.

In order to be able to adjust the angle of the tabletop in the position where the tabletop is used, as shown in FIGS. 11 and 12, locking by the locking means 208 for prohibiting the forward movement of the table 273. The position may be changed. That is, FIG. 11 and FIG.
The locking means 208 shown in the figure is formed by forming a plurality of locking holes 281 at a predetermined pitch on the side wall of a guide rail 273d provided in the recessed portion 273c of the top plate 273 and projecting into the locking holes 281. The guide pin 277b of the portion 277 can be selectively engaged. Therefore, the guide pin 277b is provided on the upper edge 277 of the protrusion 277.
It is held by a support pipe 277c fixed to a so as to be slidable in the axial direction, and its base end portion 277d is bent in an L shape. Then, the left and right guide pins 277b are elastically biased outward by the compression springs 277e, respectively, and the tips of the guide pins 277b are pressed against the side walls of the guide rail 273d. With such a configuration, when the guide pin 277b is slid along the guide rail 273d and the top plate 273 is laid down in the horizontal direction, the locking hole 281 formed at the foremost position and the guide pin 281 are formed. When it matches with 277b, the guide pin 277b
The front end of the top plate 273 is engaged with the locking hole 281 to prevent the top plate 273 from moving forward. From this state, when it is desired to further tilt the top plate 273, the base end portions 277d of the two guide pins 277b are operated in the direction toward each other against the biasing force of the compression spring 277e to move the two guide pins 277b. The guide pin 277b may be engaged with the new locking hole 281 by once removing the locking hole 281 and then changing the angle of the top plate 273. However, by simultaneously performing the steps shown in FIGS. 11 and 12 and the step shown in FIG. 10, it becomes possible to adjust both the angle and the height of the top board.

In each of the embodiments described above, the case where the guide pin provided on the upper edge of the protruding portion is provided and the guide pin is engaged with the guide rail provided on the top plate has been described. Includes an embodiment as shown in FIG. That is, as shown in FIG. 13, a protector 377c made of nylon or the like is provided on the upper edge 377a of the protrusion 377 of the lower back plate 371.
Secure the top plate 373 with the protector 377c.
The lower surface 373b of the above is slidably supported. In this case, the upper back plate 372 by appropriate locking means.
The top plate 373 may be held at a substantially horizontal top plate use position by locking the forward inclination of the top plate at a predetermined position.

[Effects of the Invention] As described in detail above, according to the present invention, a back plate that constitutes a backrest, an upper back plate and a lower back plate are divided, and the upper back plate is tilted with respect to the lower back plate. Since it is designed to be hinged to its upper edge and to move the top plate to a substantially horizontal position while supporting the top plate by the protruding portion of the lower back plate,
No special link mechanism is required, the number of parts is reduced, and it is easy to simplify the configuration.

Further, according to the present invention, the link member and the like are not exposed to the outside, and in particular, when used as an original chair, the movable part can be completely hidden by the cushion material provided on the backrest and the top plate. Therefore, it is possible to eliminate problems such as scratching clothes or attaching dirt.

Furthermore, if the height of the protruding portion can be changed or the locking position by the locking means can be adjusted,
Since the angle of the top plate with respect to the horizontal plane can be adjusted, the usability as a desk can be improved.

Further, if the height of the protruding portion can be changed and the locking position by the locking means can be adjusted, the angle of the top plate with respect to the horizontal plane can be adjusted, and the top plate can be adjusted at a desired angle. Since the height of the desk can also be adjusted, the usability as a desk can be further improved.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention, FIG. 1 is a side view with a part cut away, FIG. 2 is a front view of a backrest without a cushion material, and FIG. 3 is a top plate. FIG. 4 is an enlarged side sectional view showing the upper part of the backrest in the storage position, FIG. 4 is an enlarged side sectional view showing the upper part of the backrest in the top plate use position, and FIG. 5 is a sectional view taken along line VV in FIG. Is a perspective view showing a state in which the top plate is stored, FIG. 7 is a perspective view showing a state in which the top plate is moved to a top plate use position, and FIGS. 8 and 9 are schematic side views showing a use mode. Is. FIG. 10 is a partial rear view of the backrest showing another embodiment. FIG. 11 is a rear view corresponding to FIG. 10 showing still another embodiment, and FIG. 12 is a sectional view taken along the line XII-XII in FIG. FIG. 13 is a partial side view showing still another embodiment. 1 ... Floor, 3 ... Legs 4 ... Beam pipe, 6 ... Seat 7 ... Backrest, 8 ... Locking means 9 ... Holding means, 71 ... Lower back plate 71d ... Upper edge, 72 ... … Upper back plate 72c …… Rear surface, 72d …… Upper edge 72e …… Lower edge, 73 …… Top plate 73a …… Front edge, 73e …… Rear edge 76 …… Recessed part, 77 …… Projection part 171… … Lower back plate, 173 …… Top plate 177 …… Projection part, 208 …… Locking means 273 …… Top plate, 277 …… Projection part 371 …… Lower back plate, 372 …… Upper back plate 373 …… Top Plate, 377 ... projection

Claims (3)

[Claims] 1. A lower back plate constituting a lower half portion of a backrest,
An upper back plate which is provided flush with the lower back plate so as to form the upper half of the backrest and has its lower edge hinged to the lower back plate, and at least the upper part provided in the central portion of the upper back plate. A recess notch opening to the lower edge and the back side of the back plate, a protrusion projecting from the lower back plate toward the inside of the recess, and its front edge hinged to the upper edge of the upper back plate. The top plate, a holding means for releasably holding the top plate in a storage position of the top plate attached to the backs of the upper back plate and the lower back plate, and the forward tilting of the upper back plate to make them substantially horizontal. It is characterized by further comprising locking means for prohibiting further forward tilting of the upper back plate or forward movement of the top plate in a position where the top plate is used in which the lower surface of the top plate is supported by the projecting portion. Chair. 2. The chair according to claim 1, wherein the height of the protrusion is changeable. 3. The chair according to claim 1, wherein the locking position of the locking means is adjustable.