JPS625093B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an automatic normal position return device for a side-sliding seat in a vehicle such as a bus, a railway vehicle, or a ship.

b. Prior art and its problems In some vehicles, due to the relationship between the interior width and the number of seats in the lateral direction, there are cases where it is not possible to provide a sufficient width for a unit seat for one person, and for collective seats for two or more people. As a solution to this problem, for example, in the two-person seats of a tour bus, the unit seat closer to the center aisle can be slid sideways for a certain distance toward the aisle so that it overlaps with the window seat. Sliding seats that can expand the lateral distance at any time are widely used, but conventional sliding devices require manual movement operations each time the seat is slid sideways toward the aisle or returned to its normal position. In the event of an emergency evacuation, it becomes confusing to return the seat to its normal position, and this poses a risk of increasing confusion within the passenger compartment, especially in buses and the like where there is not enough aisle width.

c. Purpose of the Invention The purpose of the present invention is to provide a collective seat for two to four people, in which unit seats near one or both ends can be slid laterally at will within a certain section;
To provide a new convenient and safe sliding seat capable of automatically returning to a normal position when leaving the seat by dynamically stabilizing the sliding seat using the sitting load.

d Structure of the present invention A movable seat frame that supports a unit seat for one person is arranged above the leg frame main body of a fixed structure for supporting a plurality of seats, and the movable seat frame is connected to two sets of slides. In a sliding seat that is connected to the leg frame body via a movable track and allows the movable seat frame to slide horizontally over a certain distance, one piece is installed at the upper part of the leg frame body and directly below the movable seat frame. A locking washer at the bottom of a seat mounted on the upper side of a movable seat frame, in which a locking washer having a locking groove appropriately formed by several protrusions or blind holes is fixed in a horizontal direction. A rotating wedge is provided with a protruding end for engaging with the locking washer and is swingably supported at a position facing the locking washer, and the supporting portion of the rotating wedge is fixed to the base plate of the seat. A movable connection mechanism is interposed between the seat and the movable seat frame to support the seat in such a way that it can be easily floated freely from the upper surface of the movable seat frame, so that the seat can absorb the seating load while sitting. The entire seat has a seating-sensitive movable structure, and the movable seat frame and the leg frame body or other structural parts fixed to the leg frame body are connected to each other. When an energy storage spring is installed between them and the seat is slid sideways by applying operating force while seated, the rotating wedge rides on the upper surface of the locking washer, and the tip of the rotating wedge touches the locking washer. It engages with the locking groove to prevent the seat from rolling back, and when the user leaves the seat, the lateral thrust provided by the storage spring causes the rotating wedge to push the seat up and change the tilted position to the left and right. so that the seat can be automatically disengaged from the locking washer and pulled back to its normal position.
This sets the strength of the reserve spring.

The seating-sensitive movable structure can also be constructed from a portion of the seat. In this case, the connection mechanism between the seat and the movable seat frame is changed to a fixed structure, and the seating load is applied from above. By disposing a seating-sensing strip on the bottom of the seat that causes downward displacement due to elastic deformation, and fixing the supporting portion of the rotating wedge to the portion of the seating-sensing strip that causes displacement, the present invention is realized. An inventive device is constructed.

e-1 First Embodiment Figure 1 is a plan view of the first embodiment of the present invention, excluding the seat part, and Figure 2 is a vertical sectional right side view taken along line Y--Y in Figure 1. , FIG. 3 is a longitudinal sectional front view taken along the line X--X in FIG. The leg frame body has a fixed structure that can be assembled to support multiple seats, and the figure only shows the one-seater area. Reference numeral 2 denotes a frame-shaped movable seat frame for supporting a unit seat for one person, and is arranged above and parallel to the leg frame main body 1. 3 and 3' are two sets of sliding rails with a composite structure incorporating rollers, balls, ball bearings, or non-metallic sliding rails as is well known, and the fixed part of the sliding rails, that is, the lower rail, is connected to the leg frame body. 1, and by respectively connecting the movable parts, that is, the upper rails to the movable seat frame 2, the movable seat frame 2 is connected to the leg frame main body 1.
It is connected so as to be slidable in the lateral and horizontal directions. The stroke of the lateral sliding movement of the movable seat frame 2 is limited to a certain range by a known method such as protruding abutments at appropriate locations on the movable seat frame 2 or the sliding rails 3, 3'.

Reference numeral 4 denotes a locking washer having a locking groove formed in an appropriate cross-sectional shape by one or several protrusions or blind holes, and the locking washer is located at the upper part of the leg frame main body 1 and at the movable seat. It is disposed directly below the frame 2, and is fixed parallel to the slide rails 3, 3' while maintaining a horizontal orientation. 5 is a seat of a unit seat arranged above the movable seat frame 2; 6 is a locking washer 4;
a pivoting wedge with a V-shaped, U-shaped or square tip for engagement with the pivoting wedge, the pivoting wedge being disposed at the bottom of the seat 5 at a position opposite the locking washer 4;
It is pivotally attached to the lower end of a column 7 that forms a support part of the rotating wedge 6 so as to be able to swing in the horizontal direction, and the column 7 is further fixed to a base plate at the bottom of the seat 5 so that the pivoting center of the rotating wedge 6 is pivoted. is held in place behind the seat 5. The height of the rotating wedge 6 in a steady state is set such that the lowermost end of the rotating wedge 6 is slightly higher than the upper end surface of the locking washer 4 when the rotating wedge 6 is in a horizontal position, that is, in a 90 degree rotational position.

Reference numerals 8 and 8' denote two hinges interposed as a movable coupling mechanism between the seat part 5 and the movable seat frame 2. The rear end side of the seat part 5 is rotatably supported, and the front end side is It is supported in such a manner that it can be easily floated freely from the upper surface of the movable seat frame 2. In other words, the seat portion 5 is connected to the movable seat frame 2 in such a manner that only the front end side can freely move up and down, and therefore the rotating wedge 6 is also connected to the movable seat frame 2. When the seat is empty, the seat 5 and the rotating wedge 6 can float up with a small force equivalent to their own weight, and when the seat is occupied, the seat 5 is movable due to a large seating load. The seating-sensitive movable structure is constructed in such a manner that the main elements are the seat portion 5, the hinges 8, 8', the support column 7, and the rotating wedge 6.

Reference numeral 10 denotes a power storage spring that serves as a power source when automatically returning the seat portion 5 from the horizontal sliding position to the normal position, and its left end is latched to the leg frame body 1 or another structural part fixed to the leg frame body 1. The right end is locked to the movable seat frame 2, and the movable seat frame 2 is mounted in such a manner that a leftward lateral thrust is always applied to the movable seat frame 2.

Although the tension spring type is adopted as the energy storage spring 10 in this embodiment, it is changed to a compression spring such as an air spring due to design considerations, and the left end of the compression spring is connected to the movable seat frame 2. The right ends can also be respectively connected to the leg frame body 1.

In this embodiment, a hinge system is used for the connection mechanism between the seat part 5 and the movable seat frame 2, but due to design considerations, a parallel link type vertical mechanism may be used to connect the seat part 5 and the movable seat frame. 2 can also be connected.

Next, to explain the operation of this embodiment, in a steady state, the movable seat frame 2 and the entire seat are stabilized at the steady position shown by the solid line in FIG. is suppressed. Normally, when sliding a sliding seat sideways, the seated person kicks the floor with his or her feet while seated, and uses the repulsive force of the feet to start the seat. If the thrust is larger than the lateral thrust given by the storage spring 10, the movable seat frame 2 moves horizontally in the direction of arrow P, and the rotating wedge 6 also moves horizontally in the direction of arrow P.
The tip of the rotating wedge 6 rides on the upper surface of the locking washer 4 and is further dragged in the direction of arrow P. Also, with the horizontal sliding of the movable seat frame 2, the energy storage spring 10
Sufficient energy is accumulated to pull the seat back to its normal position.

When the seat is laterally slid to a predetermined position and the repulsive force of the rear legs is released, the movable seat frame 2 tries to return to the normal position by the lateral thrust given from the energy storage spring 10, but at this time, the rotation The tip of the wedge 6 is recessed into the locking groove of the locking washer 4, resulting in the inclined position shown on the right side of FIG. 6, that is, the rightward inclined position. While sitting, a load from above, that is, the own weight of the seat 5 and the seating load, is applied to the pivot point of the rotating wedge 6, and each load value is usually 2 to 3 kg for the seat 5 and 2 to 3 kg for the seating load. is 30
There is an order of magnitude difference in the load values between the two, which is approximately 60 kg, and vectors P and W in FIG. 6 illustrate this. In addition, vector F is an illustration of the lateral thrust given from the storage spring 10, and the strength of the storage spring 10, that is, the magnitude of the lateral thrust F, is slightly larger than the weight P of the seat 5. ,
This is set to an extremely small value compared to the seating load W.

The rotating wedge 6 shown on the right side of FIG. 6 shows a temporary dynamically stable state when the seat continues to slide horizontally, and when the rotating wedge 6 returns to its normal position. The pivot point of the rotating wedge 6 is raised using the tip of the rotating wedge 6 as a fulcrum, in other words, the rotating wedge 6 rotates to the left with the tip as the center of rotation. Since the pivot point moves to the left and the movement course of the pivot point traces an arc within a certain range, the balance relationship of the three forces acting on the pivot point in the stable state shown in the figure can be expressed using a vector calculation diagram. If shown, each is represented by a component force in the tangential direction of the arc, and the component forces of vectors F, P, and W can be represented by vectors Fc, Pc, and Wc, respectively.

While seated, the component force Fc of the lateral thrust applied from the energy storage spring 10 acts continuously, but the component force Fc
The component force Wc of the seating load, which is overwhelmingly larger than that in The seat can be stably maintained in the rightward leaning position shown in the figure, and the seat is therefore temporarily fixed in the horizontal sliding position in the direction of arrow P by the dynamic stabilizing means.

Next, when the seated person leaves the seat, the seating load W and its component force Wc disappear instantly, and the aforementioned component force Wc disappears in an instant.
Only the component force Pc of the own weight of the seat portion 5 acts against Fc, but the strength of the energy storage spring 10 is set so that the component force Fc is slightly larger than the component force Pc. Therefore, the pivot point of the rotating wedge 6 moves to the left through an arc-shaped movement course due to the residual force obtained by subtracting the component force Pc from the component force Fc. Further, the fact that the shape of the movement course is an upward arc as shown in FIG. 6 means that the pivot point simultaneously performs a horizontal horizontal movement moving leftward and a reciprocating movement upward and downward, pushing up slightly and returning.
On the other hand, the pivot point, that is, the pivot center of the rotating wedge 6 is held at a fixed position behind the seat 5, and the seat 5 is connected to the movable seat frame 2 in a manner that allows it to float freely. , the movable seat frame 2 and the seat part 5 move to the left, that is, in the direction of the normal position, with the horizontal horizontal movement of the pivot point of the rotating wedge 6, and in the process of this movement, a small vertical reciprocating movement of the pivot point occurs. Along with this, the seat portion 5 also performs vertical reciprocating motion. The arrow Q and the imaginary line of the seat 5 in FIG. 3 are a reference illustration of the movement of the seat 5 at the moment when the seat returns to its normal position.

When the rotating wedge 6 moves and gradually switches from the rightward tilted position to the upright position, the rotating wedge 6 loses its locking function, and the seat 5 and movable seat frame 2 quickly return to their normal positions. During the return process, the rotating wedge 6 moves to the left while pulling the protruding end of the rotating wedge, and when it returns to the normal position, the protruding end engages the locking washer 4.
The rotating wedge 6 falls off from the left end, and the rotating wedge 6 returns to an upright position due to its own weight.

Note that while the vehicle is in operation, the magnitude of the above-mentioned lateral thrust F varies slightly due to the influence of the rolling motion of the vehicle body, but since the above-mentioned component force Wc is overwhelmingly larger than the component force Fc, it is dynamically This ensures stability, and there is no risk of automatic return due to malfunction while seated.

e-2 Second Embodiment FIG. 4 is a longitudinal sectional front view showing only the essential parts of the second embodiment of the present invention, and FIG. 5 is a perspective view of the seating sensing strip in FIG. 4. Without using the hinges 8, 8', the entire seat 5 is fixed to the movable seat frame 2 in the same way as a conventional seat, and when a seating load is applied from above, the center part is displaced downward due to elastic deformation. A seating-sensing spring 11 of the structure is disposed at the bottom of the seat portion 5, and the support column 7 is separated from the substrate 9,
It is directly connected to the lower surface of the central portion of the seating sensing strip 11, and a seating sensing movable structure is constructed using the seating sensing strip, the pillar 7, and the rotating wedge 6 as main elements. 12 is a normal cushioning material molded using, for example, foamable synthetic rubber.

There is no need to limit the shape and structure of the seating sensing spring 11 as long as it can be displaced downward by a load from above. In this embodiment, an arcuate leaf spring is used, but due to design considerations, For example, a simple flat plate is arranged above the substrate 9 at a constant interval, suspension springs are attached to the four outer edges of the flat plate to elastically support the flat plate in the vertical direction, and the center of the flat plate is The support 7 may be directly connected to the lower surface.

Next, to explain the operation of this embodiment, while a person is seated, the seat-sensing spring 11 is elastically deformed by the seating load W, and its central portion is lowered.If the seat is slid laterally in this state, it is the same as in the first embodiment. Then, the pivot 6 engages with the locking washer 4 and the seat position is fixed. When you leave your seat, the seating sensing spring 11 returns to its original shape and lifts the support column 7 and rotating wedge 6 upward, so the engagement between the rotating wedge 6 and the locking washer 4 is released, and the sliding seat automatically returns to its normal state. Return to position.

f Effects of the present invention According to the present invention, by incorporating dynamic stabilizing means into the method of fixing a sliding seat, the seat automatically returns to its normal position when the seat is vacated, and is maintained at its normal position even when the seat is vacant. Therefore, it is possible to simultaneously achieve simplification of slide operation and improvement of safety, which is of extremely great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the first embodiment of the present invention excluding the seat, FIG. 2 is a vertical right side view taken along line Y--Y in FIG. 1, and FIG. 4 is a vertical sectional front view showing only the essential parts of the second embodiment of the present invention, and FIG. 5 is a perspective view of the seating sensing strip in FIG. 4. FIG. 6 is a diagram showing the operating state of the rotating wedge which forms the central part. 1... Leg frame body, 2... Movable seat frame, 3, 3'...
...sliding rail, 4...locking washer, 5...seat, 6...
...Rotating wedge, 7...Strut, 8,8'...Hinge, 10
...Storage spring, 11...Seat sensing spring.

Claims (1)

[Scope of Claims] 1. A movable seat frame for supporting a unit seat for one person is provided above a leg frame main body of a fixed structure for supporting a plurality of seats, and the movable seat frame is connected to two sets of seat frames. In a sliding seat that is connected to the leg frame body via a sliding track and that allows the movable seat frame to slide horizontally over a certain distance, there is a A locking washer with a locking groove appropriately formed by one or several protrusions or blind holes is fixed in a horizontal direction, and is locked at the bottom of the seat mounted on the upper side of the movable seat frame. A pivoting wedge provided with a protruding end for engaging with the locking washer and supported in a swingable manner is disposed at a position facing the washer, and the supporting portion of the pivoting wedge is fixed to the base plate of the seat portion. A movable connection mechanism is interposed between the seat and the movable seat frame to support the seat in a manner that allows it to be easily floated free from the upper surface of the movable seat frame. The lever seat is pressed against the movable seat frame and cannot float, and the entire seat has a seating-sensitive movable structure, and the movable seat frame and the leg frame body or other structural parts fixed to the leg frame body are connected to each other. When an energy storage spring is installed between the seats and the seat is slid sideways by applying operating force while seated, the rotating wedge rides on the upper surface of the locking washer, and the tip of the rotating wedge touches the locking washer. When the user leaves the seat, the rotational wedge pushes the seat upwards due to the lateral thrust given by the storage spring and reverses the tilted position from side to side. so that the seat can be automatically disengaged from the locking washer and pulled back to its normal position.
An automatic return device for a sliding seat, characterized in that the strength of the energy storage spring is set. 2. A movable seat frame that supports a unit seat for one person is arranged above the leg frame main body with a fixed structure for supporting multiple seats, and the movable seat frame is connected via two sets of sliding rails. In a sliding seat that is connected to the leg frame body and allows the movable seat frame to slide horizontally over a certain distance, one to several protrusions are provided on the upper part of the leg frame body and directly below the movable seat frame. A seating structure in which a locking washer having a locking groove appropriately formed by a section or a blind hole is fixed in a horizontal direction, and when a seating load is applied from above, the central portion is displaced downward due to elastic deformation. A sensing spring is arranged at the bottom of the seat fixed to the movable seat frame, and a protruding end for engaging with the locking washer is provided at a position facing the locking washer on the lower surface of the central part of the seating sensing spring. A rotating wedge is provided and is swingably supported, and the supporting portion of the rotating wedge is directly connected to the seating sensing spring, and a seating sensing movable structure is constructed using the seating sensing spring, the supporting portion, and the rotating wedge as main elements. Furthermore, a spring for accumulating energy is constructed between the movable seat frame and the leg frame main body or other structural parts fixed to the leg frame main body, and when the seat is seated, the central part of the seating sensing spring is The rotating wedge lowers, and when you sit down and slide the seat sideways, the rotating wedge rides on the top surface of the locking washer, and the tip of the rotating wedge engages with the locking groove of the locking washer. This prevents the seat from rolling back, and when you leave the seat, the seating sensing spring returns to its original shape, lifts the rotating wedge upwards and releases the engagement between the rotating wedge and the locking washer, and the energy storage spring is applied. An automatic return device for a sliding seat, characterized in that the strength of an energy storage spring is set so that the sliding seat automatically returns to a normal position by lateral thrust.