JPH064392B2 - Retractable seat with movable tread - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable retractable seat to be mounted on a vertical wall, and particularly to a retractable seat with a movable tread for a vehicle, in which a tread that interlocks with the seat is provided to raise the seat height. It is about.

b. Conventional technology and its problems In recent years, the height of floors in tourist buses has increased remarkably, and the floor of the passenger seat has become about 500 mm to 600 mm higher than the floor of the driver's seat. There is an inconvenience. As a retractable guide seat mounted on the partition wall of the driver's seat, a raised seat that eliminates the above-mentioned inconvenience has already been developed. However, in this publicly known example, a manual lifting device is attached so that the whole seat can be moved up and down, and a retractable step having an independent structure is attached to the lower part of the partition wall so that it can be appropriately used. Therefore, the storage work after using the guide seat is complicated and the number of operation steps is very large. Therefore,
In the event of an emergency evacuation due to an accident or the like, there was a risk that the guide seat would become a great obstacle for passengers.

c. OBJECT OF THE INVENTION The object of the present invention is, in a folding and retractable seat mounted on a vertical wall, by disposing a tread plate at a footrest position in front of the seat part, it is possible to raise the seat part further, and By interlocking the treads with each other, the seat and treads can be pulled out and stored by one-touch operation, for example, to meet the demand for vehicle seats that require a raised floor height such as guide seats for high-floor tourist gas. In contrast, it is to provide a retractable seat that is easy to handle and highly safe.

d. Configuration of the Invention The configuration of the present invention includes a main body storage chamber for storing seats, an outer frame including an auxiliary storage chamber in which a front end portion of the main body storage chamber is expanded forward and downward, and a main body storage chamber of the outer frame. It is rotatably connected and is used in a horizontal state, and is rotatably connected to a seat portion that is stored in the main body storage chamber in a vertical state and rotatably on the upper surface of the seat portion and in the vicinity of the rear end, And a backrest that is stored in the main body storage chamber while being tilted forward to be substantially parallel to the seat, and vertically with the seat. A suspension which is rotatably connected to the auxiliary storage chamber in front of the seat portion and lower than the seat portion by a predetermined dimension, is used in a horizontal state, and is stored in the auxiliary storage chamber in a vertical state. The girder, the rotation end of the suspension girder on the side opposite to the outer frame, and the seat portion A suspension column that is rotatably connected to a rotation end on the side opposite to the outer frame and that is movable as a part of a parallel link in conjunction with the suspension girder and seat, and is jumped up to the upper surface side of the suspension girder by itself. The tread plate is installed so that it can be used in a horizontal state and is stored in the auxiliary storage chamber in a vertical state with respect to the suspension girder, and is mounted on the front wall of the auxiliary storage chamber to keep the tread plate horizontal. A tread lock mechanism that temporarily locks in a state, and a control cord that interlocks the tread lock mechanism and the backrest and releases the locked state of the tread by the treadlock mechanism when the backrest is folded. It is equipped with.

e. Embodiment FIG. 1 is a left front oblique view showing a usage state of an embodiment of the present invention, FIG. 2 is a left side view showing a storage state of the same embodiment, and FIG. 3 is a seat of the same embodiment being pulled out. FIG. 9 is a left front perspective view showing an operating state of an intermediate stage during storage.

In the figure, reference numeral 1 denotes a stepped box-shaped outer frame having a main body storage chamber 1a and an auxiliary storage chamber 1b, and a bottom portion of the auxiliary storage chamber 1b is arranged in front of the bottom portion of the main body storage chamber 1a and at a significantly lower position. Has been done. That is, since the front end portion of the main body storage chamber 1a is expanded forward and downward, and the auxiliary storage chamber 1b is formed in front of the main body storage chamber 1a, the auxiliary storage chamber 1b is formed.
The bottom of the main storage chamber 1a is closer to the floor than the bottom of the main storage chamber 1a, and the height of the bottom of the auxiliary storage chamber 1b is lower than the bottom of the main storage chamber 1a. In other words, the outer frame 1 of the present embodiment corresponds to the front end of the outer frame of the conventional retractable seat, which is expanded forward and downward, and the bottom of the auxiliary storage chamber 1b and the main body storage chamber. The step difference from the bottom of 1a is designed to be approximately the same size as the average length of the human shin. In addition, to give a supplementary explanation of the outer frame 1, this embodiment is an example of a rearward-folding storage guide seat to be mounted on a partition wall of a driver's seat of a right-hand drive type sightseeing bus, and the outer frame 1 is exposed only on a flange on the left end face side. It is embedded in the driver's seat partition wall and fixed. The height of the outer frame 1 from the floor surface is set so that finally the height of the guide seat becomes substantially equal to the height of the passenger seat.

In this way, the outer frame 1 includes a main body storage chamber 1a for storing seats,
The main storage chamber 1a is configured with an auxiliary storage chamber 1b in which the front end portion is expanded forward and downward, and has a shape as shown in FIGS. 1 to 3. Therefore, the height position from the floor surface of the bottom of the auxiliary storage chamber 1b is determined by the main storage chamber 1
The human shin is at a position that is approximately the same as the average length, but lower than the bottom of a.

Reference numeral 2 is a foldable seat portion whose side end portion is rotatably connected to the main body storage chamber 1a, and 3a and 3b are a pair of support fittings fixed to the front end right side and the rear end right side of the seat portion 2, respectively. ,
Reference numerals 4 and 4 are two support shafts that are planted in a concentric arrangement with the front wall lower portion and the rear wall lower portion, which are boundary walls between the main body storage chamber 1a and the auxiliary storage chamber 1b, facing each other. The stoppers are fixed above the shafts 4 and 4 at positions close to the support shafts 4 and 4, respectively. The support fittings 3a and 3b have an L-shaped basic shape, and a bearing hole is bored in the center. The bearing holes are fitted to the support shafts 4 and 4, respectively, so that the right end portion of the seat portion 2 has the outer frame 1
It becomes a form that is rotatably connected to. FIG. 1 shows a state in which the seat portion 2 is laid down horizontally. In this state, since the respective pivot ends of the support fittings 3a and 3b are brought into contact with the stoppers 5 and 5, respectively, the seat portion 2 is stable in a horizontal posture. The seating load can be supported.

As described above, the seat portion 2 is rotatably connected to the main body storage chamber 1a of the outer frame 1 in a rotatable range of about 90 degrees from substantially horizontal to vertical, and the seat 2 is in a horizontal state as shown in FIG. And is stored in the main body storage chamber 1a in a horizontal state as shown in FIG.

A foldable backrest 6 is rotatably mounted on the upper surface of the seat 2 and near the rear end. A pair of left and right legs 7a and 7b each having a bearing hole are attached to the left and right ends of the lower portion of the backrest 6, respectively.
There are two support shafts 8 and 8 arranged so as to be opposed to each other on the left and right sides so as to be concentric with each other, and by fitting the bearing holes of the legs 7a and 7b to the support shafts 8 and 8, respectively, The pad 6 is rotatably connected to the seat 2. Then, similar to a conventional retractable seat, when the backrest 6 is stowed, the backrest 6 is tilted forward about the support shafts 8 and 8 and folded to a posture parallel to the seat portion 2, and the backrest 6 is supported during use. , 8 is set as a fulcrum and is designed to be stabilized by a stopper at a position slightly tilted backward from the vertical. As for the folding structure of the backrest 6, various publicly known structural forms can be arbitrarily adopted as long as the folding function described above can be obtained.

In this manner, the backrest 6 is rotatably connected to the upper surface of the seat 2 and near the rear end thereof, and is raised up to a predetermined tilt angle as shown in FIG. 1 with respect to the seat 2 in the horizontal state. As shown in FIG. 3, it is stored in the main body storage chamber 1a while being tilted forward so as to be substantially parallel to the seat portion 2 and vertically as shown in FIG. Therefore, when retracting the seat, first fold the backrest 6 forward to fold it, and then
When the rotating end of the seat 2 on the side opposite to the outer frame 1, that is, the left end, is raised and pushed upward, the seat 2 is switched to the vertical posture together with the backrest 6 and stored in the main body storage chamber 1a. It

Since the width of the outer frame 1, that is, the storage depth is preferably as small as possible from the design standpoint, when the seat is stored, the legs 7a come into contact with the inner wall surface of the main body storage chamber 1a, and the bottom surface of the seat portion 2 is the left end surface of the outer frame 1. The storage depth of the outer frame 1 is set so as to be lined up on the same plane as. Therefore, when the seat is retracted, the seat portion 2 is in a vertical posture, and the center of gravity of the composition of the seat portion 2 and the backrest 6 is biased to the right rather than above the axes of the support shafts 4 and 4. The portion 2 and the backrest 6 can maintain stability in a vertical posture.

Reference numeral 9 denotes a horizontal suspension girder disposed in front of the seat portion 2 and at a position lower than the seat portion 2 by about the same size as the average length of the human shin. The right end portion of the suspension girder 9 is a support shaft. It is rotatably connected to the lower part of the auxiliary storage chamber 1b via 12. That is, as shown in FIGS. 1 and 3, the suspension girder 9 is located in front of the seat 2 and at a position lower than the seat 2 by a predetermined dimension.
It is rotatably connected to b, is used in a horizontal state as shown in FIG. 1, and is stored in the auxiliary storage chamber 1b in a vertical state as shown in FIG.

Further, the suspension column 10 is provided at the left end of the suspension girder 9, that is, at the rotation end on the side opposite to the outer frame 1 located on the opposite side to the right end that is the connection end side with the auxiliary storage chamber 1b. It is rotatably connected via a support shaft 13, and the upper end of this suspension column 10 is opposite to the left end of the seat 2, that is, the right end which is the end connected to the main body storage chamber 1a. It is rotatably connected to the rotating end on the side opposite to the outer frame 1 side. In other words, the suspension girder 9 and the seat portion 2 are linked so as to be interlockable via the suspension column 10, and the interlocking form is a parallel link. That is, the seat 2, the suspension girder 9, and the suspension column 10 which are motion components are connected so as to form a parallelogram by the four sides of the outer frame 1 which is a fixed component to form a parallel link. . The basic dimension between the connecting portions of the seat portion 2, the suspension girder 9, the suspension column 10 and the outer frame 1, that is, the effective length between the connecting fulcrums is set to be a parallelogram.

In this way, the suspension column 10 has a rotating end on the side opposite to the outer frame 1 located on the opposite side to the right end that is the end of the suspension girder 9 connected to the auxiliary storage chamber 1b, and the main body of the seat 2. The opposite outer frame 1 located on the opposite side to the right end portion, which is the connection end side with the storage chamber 1a
Side rotating end is connected as shown in FIGS. 1 to 3,
The suspension girder 9 and the seat portion 2 are interlocked with each other and move as a part of a parallel link. Therefore, by folding the seat portion 2, the suspension girder 9
The pivoting end of is lifted up by the suspension column 10 so that the suspension girder 9 can be folded at the same time, and the seat girder 9 can be unfolded to a horizontal state so that the suspension girder 9 can be unfolded to a horizontal state.

Reference numeral 9a denotes a horizontal tread plate mounted on the upper surface side of the suspension girder 9, and the rear end portion of the tread plate 9a is rotatably connected to the upper surface side of the suspension girder 9 via a horizontally oriented support shaft 14. ing. That is, the front end of the tread 9a is connected so as to be able to jump upward, and the range of rotation is such that the rear end face of the tread 9a is suspended by the suspension girder 9.
It is designed to keep a constant angle of about 90 degrees by an appropriate method such as hitting a part of the. A spiral-shaped urging spring 15 is fitted on the support shaft 14, and the urging spring 15
Has an appropriate degree of torsional deformation and one end of which is a tread 9a.
Of the suspension girder 9, and the other end of the tread 9a is engaged with the upper surface of the suspension girder 9 by constant action of the repulsive force of the urging spring 15. There is.

In this way, the tread 9a is installed on the upper surface of the suspension girder 9 so as to be able to jump up by itself, and is used in a horizontal state as shown in FIG. In such a vertical state, it is stored in the auxiliary storage chamber 1b as shown in FIG.

In the state shown in FIG. 1, the vertical step between the seat 2 and the tread 9a is designed to have substantially the same size as the average length of a human shin. Therefore, the load when seated can be distributed to the seat portion 2 and the tread 9a at an appropriate ratio.

Reference numeral 11 denotes an embedded type handle attached to the central portion of the suspension column 10 and is a portion for applying an operation force when the seat portion 2 is pulled out from the retracted state of FIG.

Reference numeral 16 denotes an engaging element mounted on the front wall of the auxiliary storage chamber 1b, and 1
Reference numeral 7 denotes a support shaft fixed to the front wall, and the engaging element 16 is fitted on the support shaft 17 and is rotatably supported. The engaging element 16 is composed of an engaging protrusion protruding and retracting to the left from the left end of the outer frame 1, and an arm portion for controlling the position of the engaging protrusion, and the end of the arm portion and the auxiliary portion. Storage room 1b
An expandable holding spring 18 is erected between the bottom floor surface and the bottom. Then, in the steady state, that is, in the state where the seat is assembled as shown in FIG. 1, the engaging projection is projected leftward from the left end surface of the outer frame 1 by an appropriate dimension by the traction force of the holding bar 18. The engaging projection interferes with the right end portion of the tread 9a to suppress the function of the tread 9a to jump up by itself. That is, the engaging element 16, the support shaft 17, and the holding spring 18 are used as main constituent elements to constitute a tread lock function having a function of temporarily fixing the tread 9a in a horizontal posture.

In this way, the tread lock function is provided on the front wall of the auxiliary storage chamber 1b, and temporarily locks the tread 9a in the horizontal state as shown in FIG.

Reference numeral 20 is a control cord for interlocking the tread lock function with the backrest 6, the input side of the outer cord is fixed to the right end of the seat 2, the output side is fixed to the front wall of the auxiliary storage chamber 1b, and Inner rope 21
The input end of is connected to the rotating end of the leg 7b, and the output end is connected to the arm portion of the engaging element 16. Therefore, when the backrest 6 is folded forward and folded, as is apparent from FIG. 1, the input end of the inner cord 21 is pulled rearward, so that the engagement element 16 resists the traction force of the holding bar 18. Then, the posture is changed, and the state is almost switched to the state shown in FIG. In this state, since the engaging protrusion is recessed inward from the left end surface of the outer frame 1, the lock function for the tread 9a is released, and the tread 9a is released.
The urging spring 15 causes the jumping suspension girder 9 to be vertical. Therefore, the interlocking relationship between the engaging element 16 and the backrest 6 is established such that the tread lock function can be activated only when the backrest 6 is in the upright posture.

As described above, the control cord 20 has the tread lock function and the backrest 6
When the backrest 6 is folded as shown in FIG. 3, the locked state of the tread 9a by the tread lock function is released.

As described above, the retractable seat with a movable tread of this embodiment has an outer frame 1 including a main body storage chamber 1a for storing a seat and an auxiliary storage chamber 1b formed by expanding the front end portion of the main body storage chamber 1a forward and downward. And a seat portion 2 that is rotatably connected to the main body storage chamber 1a of the outer frame 1, is used in a horizontal state, and is stored in the main body storage chamber 1a in a vertical state, and an upper surface of the seat portion 2. And is rotatably connected to the vicinity of the rear end and is used in a state in which the seat portion 2 in a horizontal state is raised up to a predetermined inclination angle, and is tilted forward to be substantially parallel to the seat portion 2. The backrest 6 which is vertically housed in the main body storage chamber 1a together with the seat portion 2, and the auxiliary storage chamber 1b which is located in front of the seat portion 2 and lower than the seat portion 2 by a predetermined dimension.
A suspension girder 9 which is rotatably connected to the suspension girder, is used in a horizontal state, and is stored in the auxiliary storage chamber 1b in a vertical state, and a rotation end of the suspension girder 9 on the side opposite to the outer frame 1 and a seat portion. 2 is rotatably connected to the rotation end on the side opposite to the outer frame 1, and the suspension girder 9
Also, a suspension column 10 that is interlocked with the seat portion 2 and is movable as a part of a parallel link, and is installed on the upper surface side of the suspension girder 9 so as to be able to jump up by itself and used in a horizontal state, and the suspension girder 9 is also used. And a footboard 9a stored in the auxiliary storage chamber 1b in a vertical state with respect to the front wall of the auxiliary storage chamber 1b,
A tread plate lock mechanism that temporarily locks the tread plate 9a in a horizontal state, and the tread plate lock mechanism and the backrest 6 are interlocked, and when the backrest 6 is folded, the tread plate 6 is locked by the tread plate lock mechanism. The control cable 20 for releasing the state is provided.

Next, the operation of this embodiment will be described. When the seat is pulled out from the retracted state shown in FIG. 2, if the fingertip is put in the handgrip 11 and the suspension column 10 is pulled forward, the seat portion 2 and the suspension girder 9 are separated. Since the parallel link motion is generated, both can be switched from the vertical posture shown in FIG. 2 to the horizontal posture shown in FIG. 3 by a one-touch operation. At this time, the backrest 6 is in a folded state, and the tread 9a is in a substantially vertical posture, that is, in a jumped-up state. Then, when the backrest 6 is raised and expanded to the steady stable position, the posture of the engaging element 16 is switched from the state shown in FIG. 3 to the state shown in FIG. After that, if the tread 9a is tilted forward, the engaging protrusion of the engaging element 16 is momentarily pushed into the auxiliary storage chamber 1b, but immediately after that, the original posture is restored, so that the tread 9a is temporarily in a horizontal posture. It will be fixed and the entire seat will be assembled.

When the backrest 6 is folded when the seat is stowed, the lock function of the tread lock mechanism is released in conjunction with this,
The tread 9a automatically jumps up and changes to a vertical posture, and the entire seat changes to the state shown in FIG. Then, if the left end portion of the seat portion 2 is put on a hand and pushed up, the entire seat returns to the storage state shown in FIG. 2 by a one-touch operation. Generally, there is plenty of time to pull out a seat, but it may be urgent to store it. The seat of the present invention has a particularly simplified operation during storage.

When the seat is in the retracted state, the front end of the tread 9a is in contact with the inner wall surface of the auxiliary storage chamber 1b, and the back side of the suspension girder 9 is aligned with the left end surface of the outer frame 1 on the same side. Room 1
Since the storage depth of b is set, the backrest 6 and the hanging column 10
The suspension girder 9 maintains its vertical posture with its outer surfaces aligned.

In addition, in the seat of the present invention, since the tread 9a has a flip-up structure, the depth of the tread 9a, that is, the front and rear dimensions of the auxiliary storage chamber 1b cannot be sufficiently taken because of space saving on the vehicle body side. The necessary front and rear dimensions can be secured, and the design advantage that the cut-out area of the partition wall of the driver's seat can be made as small as possible is obtained.

f. EFFECTS OF THE INVENTION According to the present invention, in a folding retractable seat to be mounted on a vertical surface such as a driver's partition, a folding retractable tread is provided side by side, and a tread is interlocked with a seat using a hanging column. Allows you to pull out the seat and tread with one-touch operation,
To provide a retractable seat that can be stored and that is easy to handle and has high safety, for example, for a raised guide seat that is embedded in a driver's partition of a high-floor sightseeing bus You can

[Brief description of drawings]

FIG. 1 is a front left oblique view showing a usage state of an embodiment of the present invention, FIG. 2 is a left side view showing a storage state of the embodiment, and FIG. 3 shows an operation process of the embodiment. It is a front left perspective view. 1 ... Outer frame, 1a ... Main body storage chamber, 1b ... Auxiliary storage chamber, 2 ...
Seat portion 3a, 3b ... Supporting metal fitting, 4 ... Support shaft, 5 ... Stopper, 6 ... Back support, 7a, 7b ... Leg, 8 ... Support shaft, 9 ... Suspension girder, 9a ... Tread plate, 10 ... Suspension column, 11 … Hand, 12 ...
Support shaft, 13 ... Support shaft, 14 ... Support shaft, 15 ... Energizing spring, 16
... engaging element, 17 ... spindle, 18 ... holding spring, 19 ... control cord, 20 ... control cord, 21 ... inner cord.

Claims (1)

[Claims] 1. An outer frame composed of a main body storage chamber for storing seats, an auxiliary storage chamber in which a front end portion of the main body storage chamber is expanded forward and downward respectively, and rotatably connected to the main body storage chamber of the outer frame. And is used in a horizontal state, and is rotatably connected to a seat portion that is stored in the main body storage chamber in a vertical state, on the upper surface of the seat portion and near the rear end,
It is used in a state in which it is raised up to a predetermined tilt angle with respect to the seat in a horizontal state, and is tilted forward to be substantially parallel to the seat, and vertically with the seat is stored in the main body storage chamber. It is rotatably connected to the auxiliary storage chamber in front of the seat portion and lower than the seat portion by a predetermined dimension, and is used in a horizontal state and stored in the auxiliary storage chamber in a vertical state. A suspension girder, a rotation end of the suspension girder on the side opposite to the outer frame, and a rotation end of the seat on the side opposite to the outer frame, are rotatably connected, and are interlocked with the suspension girder and the seat to form a parallel link. A suspension pillar that is movable as a part, and is installed on the upper surface side of the suspension girder so as to be able to jump up by itself, used in a horizontal state, and stored in the auxiliary storage chamber in a vertical state with respect to the suspension girder. Installed on the front wall of the auxiliary storage chamber and the tread in a horizontal state. And a control cord for interlocking the tread lock mechanism with the backrest so that the tread lock mechanism releases the locked state of the tread when the backrest is folded. A retractable seat with a movable tread, characterized in that