JP3886739B2 - Convertible seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a convertible seat used in a vehicle such as a train.
[0002]
[Prior art]
In vehicles such as trains, there is a so-called “conversion seat” that can change the direction of the backrest in order to allow passengers to sit in the direction of travel of the train or facing other passengers. Commonly used. This seat change can be broadly divided into two cases: a case where the entire seat is rotated in the horizontal direction and a case where the seat is changed by changing the direction in which the backrest is laid down. Many are used to change the direction of the back as shown in.
[0003]
In the figure, a protruding portion 3 a protruding upward is provided on the upper portion of the base 3 provided on the support base 1. On the other hand, the frame 7 of the seat surface 5 is provided with a mounting groove 7a with which the projecting portion 3a is engaged, and the seat surface 5 is movable around the projecting portion 3a.
[0004]
On the other hand, two links 13 and 15 are attached between the frame 11 of the backrest 9 and the base 3, and the base 3, the link 13, the link 15, and the frame 11 of the backrest 9 A four-bar rotation mechanism is formed.
[0005]
Further, the links 13 and 15 are formed with contact portions 13a and 15a that contact the stopper portions 3b and 3c formed on the base 3 and prohibit further movement of the four-node rotation mechanism.
[0006]
The frame 7 of the seating surface 5 is provided with pins 17 and 19 which are pressed by the links 13 and 15 and can come into contact with the base 3 with the mounting groove 7a interposed therebetween.
In the state shown in FIG. 3, the contact portion 15 a of the link 15 contacts the stopper portion 3 c of the base 3, and the pin 19 provided on the frame 7 of the movable seat surface 5 is pushed by the link 15. It is in contact with the base 3.
[0007]
When the backrest 9 is moved in the direction of arrow I in the figure from this state, the backrest 9 is moved in the left direction in the figure, and the contact portion 13a of the link 13 contacts the stopper portion 3b of the base 3. The pin 17 provided on the frame 7 of the movable seating surface 5 is pushed by the link 13 and is in contact with the base 3, that is, the seat is changed.
[0008]
[Problems to be solved by the invention]
However, the convertible seat with the above configuration has the following problems.
(1) In order to convert the backrest 9, both sides of the backrest 9 are used. In general, the backrest has a shape such that the lumbar portion protrudes toward the seated person in order to support the seated person's lumbar vertebrae. There is a problem that it becomes thick, space is not available, and cost is high.
[0009]
(2) The back of the backrest 9 may be soiled by a rear seated person, and there is a problem that the seatback 9 must be seated when it is changed.
(3) Since the backrest 9 is converted by a four-bar rotation mechanism, the second half is a drop movement during the conversion movement, and it is easy to gain momentum, and the impact acting on the base 3 at the completion of the conversion is large, so a loud sound is generated. Occurs and the durability is also lowered.
[0010]
The present invention has been made in view of the above problems, and a first object thereof is to provide a low-cost convertible seat that is space-saving.
The second problem is to provide a convertible seat in which the surface contacted by the seated person in the back is not soiled by the seated person behind.
[0011]
The third problem is to provide a convertible seat that does not generate a loud sound at the time of conversion and has improved durability.
[0012]
[Means for Solving the Problems]
In the invention according to claim 1 for solving the above-mentioned problem, the first and second support portions arranged in parallel on the floor, and the first seating support portion and the second seating support portion having substantially the same shape are substantially “ A sheet body having a cam surface that is integrally formed so as to form a "<" shape and is in sliding contact with the first and second support portions, the first support portion, and the second support portion; A base end portion is rotatably attached to the floor side between, and a middle portion has a lever attached to the seat main body in the vicinity of the corner portion of a substantially “<” shape, and the cam surface is From the state where the first seating support portion of the seat body functions as a seat surface and the second seating support portion as a backrest, the entire seat body is moved so that the first seating support portion is a backrest. The conversion seat characterized in that the second seating support part has a shape for guiding to a state of functioning as a seating surface. It is.
[0013]
By rotating the lever, the cam surface of the seat body slides on the first and second support portions, the first seating support portion of the seat body is the seat surface, and the second seating support portion is the back. The entire seat body is moved from the state of functioning as a contact, and the first seating support part is converted to a state of functioning as a backrest and the second seating support part as a seating surface.
[0014]
The first and second support portions arranged side by side on the floor, and the first seating support portion and the second seating support portion having substantially the same shape are integrally formed so as to form a substantially “<” shape. Since the seat body is slid between the cam surface of the seat body and the first and second support portions, the shape of the backrest can be thinned, and the space is saved and the cost is reduced.
[0015]
Further, the surface with which the seated person in the back is in contact is not soiled by the seated person behind.
Further, when the conversion is completed, the seat body is moved in a substantially horizontal direction, so that no loud sound is generated at the time of conversion and the durability is improved.
[0016]
The invention according to claim 2 is the conversion seat according to claim 1, wherein a backrest member capable of abutting the back of the seated person is provided on the rotating end side of the lever.
In addition to the seat body, a backrest member that can contact the back of the seated person is provided, so that the comfort of sitting is improved.
[0017]
The invention according to claim 3 is a state in which the first seating support portion of the seat body functions as a seat surface, the second seating support portion serves as a backrest, and the first seating support portion is a back. 2. A groove in which the first and second support portions are fitted in the cam surface when the second seating support portion functions as a seat surface. 2. The conversion seat described in 2.
[0018]
A state in which the first seating support portion of the seat body functions as a seat surface, the second seating support portion as a backrest, and the first seating support portion as a backrest, the second seating support. In the state where the portion functions as a seating surface, the groove for fitting the first and second support portions is formed in the cam surface, whereby each state can be maintained.
In the invention according to claim 4 , the first seating support portion of the seat body functions as a seat surface, the second seating support portion functions as a backrest, and the first seating support portion includes Between the backrest and the state in which the second seating support portion functions as a seating surface, the attachment portion between the intermediate portion of the lever and the seat main body is the first support portion and the second support portion. The convertible seat according to any one of claims 1 to 3, wherein the convertible seat is located in between.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of an embodiment of the present invention.
[0020]
In the figure, the floor F is provided with first and second support portions 101 and 103 side by side. The first and second support portions 101 and 103 include the first and second support columns 105 and 107 and the first and second support columns 105 and 107 provided above the first and second support columns 105 and 107, respectively. The rollers 109 and 111 are configured.
[0021]
The seat body 121 on which the occupant P is seated is composed of a "<"-shaped seat pan 123 and a futon 125 formed on the seat pan 123, and has a substantially "<"-shaped shape. A portion 127 and a second seating support portion 129 are formed.
[0022]
Further, the seat pan 123 is formed with a cam surface 131 that is in sliding contact with the first and second rollers 109 and 111 of the first and second support portions 101 and 103.
Between the first support column 105 and the second support column 107, a bridging portion 141 that bridges the two is provided. In the bridging portion 141, a base end portion of the lever 151 is a pin 150. It is attached so that it can rotate. Further, the intermediate portion of the lever 151 is also rotatably attached to the vicinity of a substantially “<”-shaped corner portion of the sheet main body 121 using a pin 152.
[0023]
On the rotating end side of the lever 151, a backrest member 161 with which the back of the seated person P can abut is provided.
The cam surface 131 of the seat body 121 is the entire seat body 121 from the state in which the first seating support portion 127 functions as a seat surface and the second seating support portion 129 functions as a backrest (the state shown in FIG. 1). The first seating support portion 127 is set to a shape that guides to a state in which the first seating support portion 127 functions as a backrest and the second seating support portion 129 functions as a seating surface. The state in which the part 127 functions as a seat and the second seating support part 129 functions as a backrest, and the state in which the first seating support part 127 functions as a backrest and the second seating support part 129 functions as a seating surface. At this time, grooves 133, 135, 137, 139 are formed in which the first and second rollers 109, 111 of the first and second support portions 101, 103 are fitted.
[0024]
Next, the operation of the above configuration will be described with reference to FIG.
From the state shown in FIG. 1, that is, the first seating support portion 127 functions as a seat surface, the second seating support portion 129 functions as a backrest, and the first roller 109 of the first support portion 101 functions as a cam surface 131. When the lever 151 is rotated clockwise from the state in which the second roller 111 of the second support portion 103 is fitted in the groove 137 in the groove 133 of FIG. 2, (a) to (f) in FIG. As shown, the sheet main body 121 rotates while being guided by the cam surface 131 sliding on the first and second rollers 109 and the second roller 111, and the first roller 109 of the first support portion 101 is rotated. The second roller 111 of the second support portion 103 is fitted into the groove 139 in the groove 135 of the cam surface 131, the first seating support portion 127 is the backrest, and the second seating support portion 129 is the seating surface. Switched to a functioning state.
[0025]
Furthermore, the original state is restored by performing the movements of FIGS. 2F to 2A from this state.
According to the above configuration, the following effects can be obtained.
[0026]
(1) The first and second support portions 101 and 103 arranged side by side on the floor F, and the first seating support portion 127 and the second seating support portion 129 having substantially the same shape are substantially “<”. The seat body 121 integrally formed so as to form a slidable shape is slid between the cam surface 131 of the seat body 121 and the first and second support portions 101 and 103, so that the shape of the backrest is changed. It can be made thin, space saving, and low cost.
[0027]
Further, the surface that the seated person P in the back contact comes into contact with is not soiled by the seated person behind.
Further, when the conversion is completed, the seat body 121 is moved in a substantially horizontal direction, so that no loud sound is generated and the durability is improved.
[0028]
(2) By providing the back abutting member 161 with which the back of the seated person can come into contact in addition to the seat main body 121, the sitting comfort is improved.
(3) The first seating support portion 127 of the seat main body 121 functions as a seat surface, the second seating support portion 129 functions as a backrest, and the first seating support portion 127 serves as a backrest. Grooves 133, 135, 137, 139 in which the first and second rollers 109, 111 of the first and second support portions 101, 103 are fitted when the seating support portion 129 functions as a seating surface. By forming the cam surface 131 on the cam surface 131, each state can be maintained.
[0029]
【The invention's effect】
As described above, according to the first aspect of the present invention, the first and second support portions arranged side by side on the floor, and the first seating support portion and the second seating support portion having substantially the same shape are provided. Since the seat body integrally formed so as to form a substantially “<” shape is slid between the cam surface of the seat body and the first and second support portions, the shape of the backrest is changed. It can be made thin, space saving, and low cost.
[0030]
Further, the surface with which the seated person in the back is in contact is not soiled by the seated person behind.
Further, when the conversion is completed, the seat body is moved in a substantially horizontal direction, so that no loud sound is generated at the time of conversion and the durability is improved.
[0031]
According to the second aspect of the present invention, the comfort of sitting is improved by providing the backrest member with which the back of the seated person can come into contact in addition to the seat body.
According to the invention described in claim 3, the first seating support portion of the seat body functions as a seat surface, the second seating support portion functions as a backrest, and the first seating support portion. In the state where the backrest and the second seating support part function as a seating surface, a groove into which the first and second support parts are fitted is formed in the cam surface. Can be held.
[Brief description of the drawings]
FIG. 1 is a side view of an embodiment of the present invention.
FIG. 2 is a diagram for explaining the operation of FIG. 1;
FIG. 3 is a diagram illustrating a configuration of a conventional convertible seat.
[Explanation of symbols]
101 1st support part 103 2nd support part 121 Seat main body 127 1st seated person support part 129 2nd seating support part 131 Cam surface

Claims (4)

First and second support portions juxtaposed on the floor;
A cam surface that is integrally formed so that a first seating support portion and a second seating support portion having substantially the same shape form a substantially “<” shape, and is slidably contacted on the first and second support portions. A sheet body having:
A base end portion is rotatably attached to the floor side between the first support portion and the second support portion, and an intermediate portion is rotatable on the seat body in the vicinity of a substantially “<”-shaped corner. A lever attached to the
Have
The cam surface moves the entire seat body from a state in which the first seating support portion of the seat body functions as a seat surface and the second seating support portion as a backrest, and the first seating portion A convertible seat characterized in that the support portion is a backrest and the second seating support portion is guided to a state of functioning as a seating surface.   The convertible seat according to claim 1, wherein a backrest member capable of abutting a back of a seated person is provided on a rotating end side of the lever.   The first seating support portion of the seat body functions as a seat surface, the second seating support portion functions as a backrest, and the first seating support portion serves as a backrest and the second seating support. The conversion seat according to claim 1 or 2, wherein a groove into which the first and second support portions are fitted is formed in the cam surface when the portion functions as a seating surface. A state in which the first seating support portion of the seat body functions as a seat surface and the second seating support portion as a backrest; and the first seating support portion as a backrest and the second seating support portion. Between the state of functioning as a seating surface,
  The attachment location of the middle part of the lever and the seat body is
  The first support part and the second support part are located between the first support part and the second support part. 1 Convert seat according to any one of 3 to 3.

Images