JPH08168419A - Seat - Google Patents

Abstract

PURPOSE: To provide a seat constituted so that a seat back holding frame can be easily attached and detached with respect to a base frame even when the support accuracy of the seat back holding frame to the base frame becomes inferior. CONSTITUTION: A notch recessed part 5 is provided to the leg part 4A of a seat back holding frame 4 and a seat back hinge bracket 13 is fitted to a hinge pin 16 attached to the base frame center frame 9 and bracket 11 on the side of a base frame 6 in a freely shakable manner. The notch recessed part 5 is fitted in a notch recessed part support part 12A of the bracket 13 and the leg part 4A is fixed to the bracket 13 in a detachable manner by a hexagonal bolt 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back which supports a seat occupant's back and can be tilted rearward from a standard position.

[0002]

2. Description of the Related Art Stools of the type described above, which are widely used in railway cars, automobiles, aircraft, ships, theaters, or in ordinary households, are well known in the art. In this type of seat, a seatback holding frame, which is a framework of the seatback, is swingably supported by the underframe. The seat back holding frame, which is a framework of the seat back, can be attached to and detached from the underframe together with the seat back so that the seat back can be removed from time to time for cleaning and maintenance inspection. However, in the conventional stool, if the assembly accuracy of the seatback holding frame and the underframe deteriorates, the seatback holding frame may not be easily removed or attached to the underframe.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a seat back holding frame which can be easily attached to and removed from the underframe together with the seat back. It is in.

[0004]

In order to achieve the above object, the present invention supports a seat cushion for supporting a seated person's hips, an underframe for supporting the seat cushion, a seated person's back, and a standard position. From the rear side to the seat back that can be tilted around the swing axis, a seat back holding frame that is a framework of the seat back and tilts together with the seat back with respect to the underframe, and can be swung to the underframe side. A seat back hinge bracket supported by the seat back hinge, the swing axis of which matches the swing axis of the seat back and the seat back holding frame; and fixing means for detachably fixing the lower portion of the seat back holding frame to the bracket. We propose a stool that is equipped with.

At this time, the fixing means is formed in the leg portion of the lower portion of the seat back holding frame, and the notch recess opened to the side of the seat back hinge bracket and the notch recess provided in the seat back hinge bracket. Is detachable, and the cutout recess support portion that supports the seatback holding frame in a state where the cutout recess is engaged, the leg portion of the seatback holding frame, and the seatback hinge bracket. Advantageously, it comprises a stop member for removably fixing.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings while comparing them with a conventional configuration.

FIG. 1 is an exploded perspective view showing the structure of a seat back support portion of a seat according to an embodiment of the present invention. FIG. 2 is an external perspective view of a stool according to an embodiment of the present invention, in which a pair of left and right stools 10 and 10a arranged in a passenger compartment of a railway vehicle is shown. Since the basic configuration of these stools 10 and 10a does not change, only the one designated by the reference numeral 10 will be described.

The seat 10 has a seat cushion 1 for supporting the back of the seated person and a seat back 2 for supporting the back of the seated person, which is not shown, and the latter seat back 2 will be described later from the standard position shown. It can be tilted rearward around the swing axis. The stool 10 has the armrest 3 arranged on one side of the seat cushion 1, and the armrest 3A is also arranged between the seat cushions of the stools 10 and 10a.

Here, in explaining the structure of the stool 10 more concretely, in order to speed up the understanding of the structure or to clarify the structure, the drawings of FIG. It is clarified in advance using.

In FIG. 5, the seat back holding frame 104 has leg portions 104A, 104 on both left and right sides of its lower portion.
It has B and serves as a framework of the seat back 102 shown in FIG. The seat back 102 is integrally assembled and supported by the seat back holding frame 104. The underframe 106 supports the seat cushion 1 as shown in FIG. 2, and an underframe center frame 109 is fixed to the underframe pipes 107 and 108, which are one component of the underframe 106, and an armrest is provided. 103 is also fixed to these underframe pipes 107 and 108.
Further, the base end portions of a pair of left and right arm-shaped brackets 111 and 112 are fixed to one underframe pipe 107.

As shown in FIGS. 6 and 7, one leg portion 1
A collar 114 is fitted into the hole 113 formed in 04A, the hole 111a provided in the upper end of the one arm-shaped bracket 111, and the tubular portion 109A fixed to the underframe center frame 109. A hexagon bolt 115 is fitted into the collar 114 via a plain washer 116 and a spring washer 117. Then, the hexagon bolt 115 is screwed into the female screw portion 109A ₁ of the tubular portion 109A. In this way, one leg portion 104A of the seatback holding frame 104 is pivotally supported on the underframe 106 so as to be swingable in the front-back direction of the stool 10.

As shown in FIG. 5, the other leg portion 104B is also pivotally supported by the arm-shaped bracket 112 and the armrest 103 via the collar 119 and the hexagon bolt 120 similar to those described above. The configuration differs from the above-described leg 104A side only in that the cylindrical portion 103A to which the bolt 120 is screwed is fixed to the armrest 103 instead of the underframe center frame 109.

As described above, the seatback holding frame 104 can be tilted around the collar 114 and the collar 119 which is similarly configured on the other leg 104B. Also, as shown in FIG.
A gas spring 118 is connected to 4A between the underframe center frame 109 and 4A, as shown in FIG.
Due to the force of the gas spring 118, the seat back holding frame 104 and the seat back 102 are rotationally biased toward the standard position shown by the solid line.

The seat back holding frame 104 together with the seat back 102 can be tilted against the force of the gas spring 118 thereof toward the tilt position shown by the phantom line in FIG. By a lock mechanism (not shown), the seat back 2 and the seat back holding frame 104 can be stopped at the tilted position, the standard position, and any position between them. That is, the seat back 102 and the seat back holding frame 104 are tiltable rearward from the standard position around the collars 114 and 119 with respect to the underframe 106. The rocking axis of 104 is collar 11.
It is the central axis of 4,119.

As described above, the seat back 102 can freely adjust its tilt position by the action of the gas spring 118 in accordance with the physical condition and taste of the seated person, so that the seat back 102 is always comfortably seated. can do.

Here, as shown in FIG. 7, a collar 114 for swingably supporting the seat back holding frame 104.
Are hexagon bolts 115, plain washers 116, spring washers 1
The seat back 102 (FIG. 8) can be prevented from coming off by the 17 or the like.
6 is removed, the hexagon bolt 115 on one leg 104A side is removed, and the collar 114 is pulled out from the tubular portion 109A of the underframe center frame 109.
Similarly, the hexagon bolt 120 and the collar 119 on the side of the other leg 104B are also pulled out from the tubular portion 103A.

To attach the seat back, the collar 114 is provided with holes 113 in the tube portion 109A and the leg portion 104A.
(FIG. 6) and the hole 111a (FIG. 6) of the bracket 111, and then the hexagon bolt 115 is screwed into the female screw portion 109A ₁ through both washers 116 and 117. The same applies to the other leg 104B side as well.
9 and the hexagon bolt 120 are attached to the cylindrical portion 103A.

The seat back 102 (FIG. 8) was attached and detached together with the seat back holding frame 104 in the above-described procedure when cleaning the seat back 102 or performing maintenance and inspection thereof. The cylindrical portion 109A of the underframe center frame 109 shown in FIG. 6 and the hole 111a of the arm bracket 111 shown in FIG. 6 due to variations in the accuracy of manufacturing the stool and slight plastic deformation of each component as the stool is used. When the core misalignment occurs, it is very difficult to remove the collar 114.
Also, when the seat back 102 is attached, the legs 104
The hole 113 of A and the hole 111 of the arm-shaped bracket 111
When they are aligned with a, they cannot be visually inspected, so it is very difficult to insert the collar 114 into these holes, which makes mounting of this type of seat back extremely difficult. The same phenomenon was occurring on the other leg 104B side. For such a reason, it takes a lot of time to perform a series of attaching / detaching operations of the seat back 102 and the seat back holding frame 104.

The seat 10 shown in FIGS. 1 to 4 eliminates such a problem, and as shown in FIG. 1, the leg portion 4A at the lower portion of the seatback holding frame 4 has a cutout recess. 5 are provided. The seat back holding frame 4 is configured in the same manner as the seat back holding frame 104 shown in FIG. 5, except for the shape of its legs, holds the seat back 2 shown in FIG. It is a skeleton and tilts with respect to the underframe 6 together with the seat back 2. The seatback holding frame 4 has leg portions formed on both left and right sides of the lower portion thereof, and one leg portion 4A is the leg portion 104A shown in FIG.
Is equivalent to.

The underframe 6 corresponds to the underframe 106 shown in FIG. 5, and its overall structure is the same as that of the underframe 106 shown in FIG. 5, and the two frames extend in the lateral direction of the stool. Of the underframe pipe (only one of the underframe pipes 7 is shown in FIG. 1) and an underframe center frame 9 for integrally fixedly connecting these pipes to each other. 3 (FIG. 2) is fixed. The underframe 6 is
The seat cushion 1 shown in FIG. 2 is supported, and the seat cushion 1 is detachably supported on the underframe 6.

In FIG. 1, reference numeral 13 is a seat back hinge bracket formed in a substantially U shape, and this seat back hinge bracket 13 is an underframe 6.
It is swingably supported on the side of. The seat back hinge bracket 13 is provided with a notch recess support 12A, and the notch recess 5 of the leg 4A is removably fitted into the notch recess support 12A. . Then, in the state in which the notch recess 5 is engaged with the notch recess support 12A as shown in FIG. 4, the notch recess support 12A supports the seatback holding frame 4. In this example, the central cylindrical portion of the cylindrical member 12 which is fixed to both side plates 13A and 13A of the seat back hinge bracket 13 and extends in the lateral direction of the stool serves as the cutout concave portion supporting portion 12A. The cutout recess 5 formed in the leg portion 4A at the lower portion of the seatback holding frame 4 is a cutout recess on the seatback hinge bracket 13 side and opened to the cutout recess support 12A. .

At the rear of the underframe center frame 9 fixed to the underframe pipe 7 on the rear side of the underframe 6 and the underframe pipe on the front side (the pipe denoted by reference numeral 108 in FIG. 5), a stool is seated. A cylindrical member 9A extending in the lateral direction is fixed through, and the cylindrical member 9A, the cylindrical member 12 of the seat back hinge bracket 13 and the upper end of the arm-shaped bracket 11 fixed to the underframe pipe 7 are seated. The seat back hinge bracket 13 is fitted into the hole 11a of the boss portion 11A extending in the lateral direction of the seat back hinge bracket 16 by fitting the hinge pin 16 therein.
Is an underframe center frame 9 and an arm-shaped bracket 11
It is attached to the hinge pin 16 in a state in which it is located between and. The fitted hinge pin 16 is fixed to the boss portion 11A of the arm bracket 11 by inserting the snap pin 17 so that the hinge pin 16 does not come off. In this way, the seat back hinge bracket 1
3 is swingably supported on the underframe 6 side.

A panel plate 14 is fixed to the base plate 13B of the seat back hinge bracket 13, and an elastic member 15 made of urethane foam or the like is provided on the surface of the panel plate 14 opposite to the side to which the bracket 13 is fixed.
A is fixed. At the time of manufacturing the stool 10, before attaching the seatback holding frame 4 to the underframe 6, the seatback hinge bracket 13 is preliminarily attached to the hinge pin 16 fitted in the above-mentioned position together with the panel plate 14 and the elastic member 15A. , It is assembled to the underframe 6. In this way, the seat back hinge bracket 13 is allowed to freely rotate around the hinge pin 16.

Next, the notch recess 5 of the seat back holding frame 4 is fitted into the notch recess support 12A so as to slide in, and the notch recess 5 is engaged with the notch recess support 12A. In this state, hexagon bolt 1
9 to the hole 13a of the bracket 13 and the hole 4A _{1 of the} leg 4A
Then, the nut 20 which is pre-welded to the bracket 13 is screwed and fixed. The hole 13b of the bracket 13 to one more of the hexagonal bolt (not shown) in a similar manner, fitting into the bore 4A ₂ of the legs 4A, stopping and screwed into a nut welded to the bracket 13 (not shown). In this way, the notch recess 5 of the leg 4A is attached to the notch recess support 12A.
The leg portion 4A and the seat back hinge bracket 13 are detachably fixed to each other in a state in which is engaged. That is, the seat back holding frame 4 is fixed to the seat back hinge bracket 13 so that the leg portion 4A can be detached from the seat back hinge bracket 13 by removing the bolt 19 and the other bolt from the nut.

The side of the other leg (the leg corresponding to the leg 104B of the seat back holding frame 104 in FIG. 5) facing the leg 4A is not shown in the figure, but is similar to the above. Is fixed to the seat back hinge bracket, and the bracket is swingably supported on the underframe 6 side. On the other leg side, the cylindrical member (corresponding to the cylindrical member 9A in FIG. 1) fixed to the seat back hinge bracket on this side is not in the underframe center frame 9 but in the armrest 3 (FIG. 2). Only the point of fixation is different from the configuration on the side of one leg 4A. The swing axis line of the seat back hinge bracket 13 shown in FIG. 1 and the swing axis line of the seat back hinge bracket (not shown) on the other leg side are aligned with each other.

FIG. 3 shows a seat back hinge bracket 13
FIG. 4 is a side sectional view of a lower side of the seat back holding frame 4 fixed to the seat back holding frame 4, in which an elastic member 15A is connected to an elastic member main body 15 of the seat back 2 attached to a back portion of the seat back holding frame 4. That is, the elastic member body 1 on the back side
The corners on the lower end side of 5 are notched in a rectangular shape, and the elastic member 15A is located at this portion and becomes a part of the elastic member. Then, the outer skin 21 of the seat back 2 is covered from above the elastic members 15 and 15A. At that time, the lower part of the outer skin 21 is not joined to the surface of the elastic member 15A.

As shown in FIG. 4, a gas spring 18 is connected to the lower end of the leg portion 4A of the seatback holding frame 4, and this connection form is similar to that of the gas spring 118 shown in FIG. Is. That is, the spring 18 is also connected to the leg portion 4A and the underframe 6 side, and biases the seatback holding frame 4 and the seatback 2 toward the standard position.

Here, the seat back hinge bracket 1
3 is swingably supported on the underframe 6 side, and its swing axis line extends in the lateral direction of the seat and coincides with the swing axis lines of the seat back 2 and the seat back holding frame 4. ing. That is, the central axis of the notch recess 5 of the seatback holding frame 4 assembled to the underframe 6,
That is, the central axis of the cylindrical member 12 matches. The same applies to the side of the other leg portion, so that the seat back 2 can be swung in the front-back direction of the seat about the swing axis of the center of the hinge pin 16, which is completely different from the conventional example described above. Similarly, tilting turning from the standard position to the tilting position and returning turning from the tilting position to the standard position are possible, respectively, and the locking mechanism (not shown) of the gas spring 18 locks the gas spring 18 at any position.

In the conventional example shown in FIG. 6, the leg portion 104A should be called the hinge portion of the seatback holding frame, but in this example, the hinge bracket 13 is used instead of the hinge portion. This is installed on the side of the underframe 6, and the leg portion 4A is provided with the notch concave portion 5 which can be engaged and disengaged in the radial direction with respect to the notch concave portion supporting portion 12A instead of the hinge hole.

When removing the seat back 2 (FIG. 2) together with the seat back holding frame 4 from the underframe 6, the bolt 19 and another bolt shown in FIG. It is pulled out from the cutout recess support portion 12A. Do exactly the same thing on the other leg. In this case, both seat back hinge brackets 13
Is left as it is on the underframe 6 side together with the panel plate 14 and the elastic member 15A. Since the lower portion of the outer skin 21 shown in FIG. 3 is not joined to the elastic member 15A, the seat back can be removed from the underframe 6 without any trouble. Further, the seat back 2 and the seat back holding frame 4 can be swingably assembled to the underframe 6 by the above-described operation.

As described above, when the seat back 2 is attached or detached, the seat back hinge bracket 13 is left on the underframe 6 and the seat back holding frame 4 is attached or detached to or from the bracket 13. According to this structure, the support accuracy of the seat back holding frame 4 that swingably supports the seat back 2 becomes poor, and for example,
Even if the cylindrical member 9A shown in FIG. 1 and the boss portion 11A are misaligned, the notch recess 5 of the seatback holding frame 4 is replaced by the notch recess of the seatback hinge bracket 13 regardless of the misalignment. It can be easily attached to and detached from the support portion 12A. That is, without removing the seat back hinge bracket 13, the notch recess 5 is inserted into and removed from the notch recess support 12A,
The seat back 2 can be easily removed and attached. Further, the notched concave portion 5 and the notched concave portion supporting portion 12A can be attached and detached while visually observing the notched concave portion 5 and the work can be easily performed. In this way, it becomes possible to easily perform the maintenance work of the seat.

As described above, the lower portion of the seatback holding frame 4 is detachably fixed to the seatback hinge bracket 13. In this example, the fixing means is the lower portion of the seatback holding frame 4. Leg 4A
Formed on the seat back hinge bracket 13
Is provided in the seat back hinge bracket 13 and the notch recess 5 is opened and closed, and the notch recess 5 is engageable and disengageable, and the seat back is held in a state in which the notch recess 5 is engaged. It is provided with a notched recessed portion support portion 12A for supporting the frame 4 and a stopper member for detachably fixing the leg portion 4A of the seat back holding frame 4 and the seat back hinge bracket 13, as shown in FIG. In the example, the stop member comprises a bolt 19 and another bolt, as well as a nut 20 to which they are respectively screwed.

According to this structure, when the seat back holding frame 4 is fixed to the seat back hinge bracket 13, the cutout recess 5 is first formed in the cutout recess support portion 1.
The seat back holding frame 4 is positioned and supported by the seat back hinge bracket 13 by engaging with the seat 2A, and in this state, the leg portion 4A is fixed to the seat back hinge bracket 13 by the stopper member composed of the bolt 19 and the nut 20. Therefore, the series of fixing operations can be performed accurately and easily. Seat back holding frame 4
The same is true when the vehicle is separated from the seat back hinge bracket 13.

In the illustrated embodiment, two leg portions are provided in the lower portion of the seatback holding frame, and each leg is supported by the underframe 6 via the seatback hinge bracket. You may comprise so that 1 part of the frame lower part, or 3 or more parts may be rockably supported by the underframe via a seat back hinge bracket, respectively. Thus, at least one seat back hinge bracket is provided.

The present invention can be widely applied not only to the stools of railway vehicles but also to the stools used in automobiles, aircrafts, ships, theaters, offices, homes and the like.

[0036]

According to the first aspect of the invention, the seat back can be easily attached to and detached from the underframe regardless of the seat back support accuracy, and the seating maintenance work can be easily performed.

According to the second aspect of the present invention, the notch recess provided in the leg portion of the seat back holding frame is provided with the notch recess support portion provided in the seat back hinge bracket installed on the underframe side. On the other hand, since it can be freely inserted and removed in the radial direction, the seat back can be easily attached and detached regardless of the support accuracy of the seat back by the cutout concave portion support portion, and the seating maintenance work can be performed more easily. it can.

Moreover, when fixing the seatback holding frame to the seatback hinge bracket, the seatback holding frame is positioned on the seatback hinge bracket by first engaging the notch recess with the notch recess support portion. Since the leg portion can be supported and fixed to the seat back hinge bracket by the stop member in this state, the series of fixing operations can be performed accurately and easily. The same applies when the seat back holding frame is detached from the seat back hinge bracket.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a seat back support portion of a seat according to an embodiment of the present invention.

FIG. 2 is a perspective view of a seat according to an embodiment of the present invention.

FIG. 3 is a side sectional view of a lower side of a seatback holding frame fixed to a seatback hinge bracket.

FIG. 4 is a partial sectional side view showing the lower side of the seatback holding frame together with a gas spring.

FIG. 5 is a perspective view showing an example of a conventional seatback holding frame for sitting together with an underframe and the like in which a seatback and a seat cushion are omitted.

FIG. 6 is a perspective view showing a conventional seatback holding frame support portion of a stool.

7 is a partially cutaway front view showing a main part of the seat back holding frame support portion shown in FIG.

FIG. 8 is a side view of the seat back for explaining that the conventional seat back is placed in the standard position or the tilted position by the action of the gas spring.

[Explanation of symbols]

 1 Seat Cushion 2 Seat Back 4 Seat Back Holding Frame 4A Leg 5 Cutout Recess 6 Underframe 12A Cutout Recess Support 13 Seatback Hinge Bracket

Claims (2)

[Claims] 1. A seat cushion that supports a seated person's hips, an underframe that supports the seat cushion, and a seated person's back, and a seat back that can be tilted rearward from a standard position around a swing axis. And a seat back holding frame that is a framework of this seat back and tilts together with the seat back with respect to the underframe, and is swingably supported on the underframe side, and the swing axis line of the seat back and seat back A stool comprising a seatback hinge bracket that matches the swing axis of the holding frame, and a fixing unit that detachably fixes the lower portion of the seatback holding frame to the bracket. 2. The fixing means is formed in a leg portion of a lower portion of the seat back holding frame, and a cutout recessed portion opened to a side of the seatback hinge bracket, and the cutout recessed portion provided in the seatback hinge bracket. Is detachable, and the cutout recess support portion that supports the seatback holding frame in a state where the cutout recess is engaged, the leg portion of the seatback holding frame, and the seatback hinge bracket. The stool according to claim 1, further comprising a stop member that is detachably fixed.