JPH0517404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seat cushion fixing device used for fixing a seat cushion to a vehicle floor.

Conventional technology Conventional seat cushion fixing devices include Utility Model Application No. 56-40026, Utility Model Application No. 57-83030, and Utility Model Application No. 1987-83030.
-The one disclosed in Publication No. 83029 has been proposed, and the one shown in Figs. 5 to 8 has been put into practical use as a one-piece molded product made of synthetic resin for ease of molding while following the conventional technology. has been done. That is, this seat cushion fixing device is composed of two members, a fixing device body 1 and a housing 2, and both members 1 and 2 are integrally molded from a suitable resin. A handle portion 3 is provided on one end side of the fixing device main body 1, and the handle portion 3 is provided with a finger engagement hole 3a. Further, an intermediate portion 4 is connected to the handle portion 3 via a first hinge portion 5, and the intermediate portion 4 has a pair of protrusions 6, 6 formed in a raised manner on both side edges, and the protrusions. The opening 7 is provided between the parts 6 and 6. Furthermore, in the intermediate portion 4,
A substrate portion 9 is connected to the second hinge portion 8 via the second hinge portion 8 . Approximately U-shaped guides 10, 10 are protruded from opposite ends of the substrate portion 9, and in the vicinity of the guides 10, 10, on the back side in FIG. Protrusions 11, 11 are provided. In addition, the substrate portion 9 has a substantially T-shaped hole 1 in FIG. 5A.
2 is provided, and one end 13 is provided in the hole 12.
a is the folded part 9b for supporting the guide 10 of the base plate part 9.
A hook piece 13 is provided with the other end 13 b raised in the same direction as the protrusion 6, that is, in the left direction in FIG. 14 are installed horizontally in one piece.

On the other hand, as shown in FIG. 6, the housing 2 includes a side wall 15 having a semi-elliptical cross section, a bottom 16 formed at the lower end of the side wall 15, and a flange 17 formed at the upper end. . The bottom portion 16 is provided with a protrusion 20 that engages with a through hole 9a formed in the vicinity of the second hinge portion 8 of the base plate portion 9 of the fixing device main body 1.
A through hole 21 for removing the mold is provided at the joint portion with the mold. Furthermore, engaging rods 22, 22 are provided oppositely to the flange 17 with a width that allows insertion while making contact with the inner surface 10a of the guide 10, and at the tips of the engaging rods 22, 22, Return claws 23, 23
is formed.

In both members having the above configuration, the fixing device main body 1 is arranged in the directions of arrows a and b, in which the handle portion 3 and the base plate portion 9 at the center of each hinge portion 5, 8 are close to each other, as shown in FIG. 5C. 7, the mounting portion 3 is loosely inserted between the guides 10, 10, and the protrusion 6 is made to correspond to the plate 14. Next, the engaging rod 22 of the housing 2 is inserted between the inner surface 10a of the guide 10 and the side surface 3b of the handle part 3, and the through hole 9a of the fixing device main body 1 is positioned inside the protruding piece 20, so that both members Subassembly 1 and 2.

On the other hand, as shown in the figure, an assembly hole 25 is provided in the vehicle body floor 24, and an assembly hole 25 is provided in the vehicle body floor 24.
At 6, a wire 28, which is a locked member, is fixed to the seat cushion frame 27 and is formed into a substantially U-shape when viewed from the left in FIG.

Thus, the fixing device main body 1 and the housing 2 sub-assembled as described above are connected to the gap between the protrusion 11 of the fixing device main body 1 and the folded part 9b for supporting the guide 10 of the base plate 9, and the engaging portion 19 of the housing 2. are fitted into the opening edge of the assembly hole 25 and fixed to the assembly hole 25 (FIG. 8).

When installing the seat, the wire 28 is engaged with the hook piece 13 as shown in FIG. When removing the sheet, the fingers of one hand are engaged with the finger engaging holes 3a, as shown in FIG. As a result, the protrusion 6 rotates in the same direction about the second hinge part 8, presses the plate 14, and pushes the plate 14 outward from the hole 12. Therefore, the hook piece 13, which is integrally formed with the plate 14, is displaced together with the plate 14, leaving the wire 28 behind, and the wire 28 is in a disengaged state. The operator then pulls the handle 3 with one hand and lifts the seat 26 upwards, that is, in the direction of arrow d, with the other hand, the wire 28 is pulled up and the seat 26 is moved to the vehicle floor.
It can be removed from 4.

Problems to be Solved by the Invention However, in such a conventional device, since the wire 28 and the hook piece 13 are separated from each other by pulling the handle portion 3, it is difficult to pull the handle portion 3 excessively. When it is pulled, stress at the time of pulling is concentrated on the first hinge portion 5, which is formed into a thin wall shape. For this reason, in vehicles such as commercial vehicles where the seat cushion 26 is often removed to clean the interior of the vehicle, fatigue may occur in the hinge 5 due to stress concentration during repeated tensioning, and as a result, the handle portion 3
There was a risk that the material would be torn off from the first hinge portion 5.

The present invention has been made in view of the above-mentioned conventional situation, and has a structure that allows the seat cushion to be removed without using a pulling operation that tends to apply excessive operating force, thereby improving durability. The present invention provides an improved seat cushion fixing device.

Means for Solving the Problems In order to solve the above problems, in the present invention, a plate is provided protruding from the lower surface of the seat cushion, and narrowed portions are formed on opposite sides of the plate, while A mounting hole is provided in the vehicle body floor, a base member is fitted into the mounting hole, and a pair of elastic rods are fitted in the intermediate portion to form an annular portion that cooperates with the base member and engages with the narrowed portion. A disengagement operation piece is installed in the core and is capable of enlarging the diameter of the annular portion by pressing in a direction approaching the free end of the elastic rod.

Function In the above configuration, when installing the seat cushion, the plate is inserted into the annular portion formed by the pair of elastic rods. As a result, the annular portion is temporarily expanded, and then contracted in diameter and engaged with the narrowed portion, thereby fixing the seat cushion to the vehicle floor. Next, when removing the seat cushion, the engaging operation pieces are pressed in a direction toward each other to enlarge the diameter of the annular portion. As a result, the annular portion is disengaged from the narrowed portion, and by lifting the seat cushion upward, the plate is pulled out of the annular portion, allowing the seat cushion to be removed from the vehicle floor. In this way, the seat cushion is removed by pressing the engagement operation pieces in the direction toward each other to increase the diameter of the annular portion, so that excessive operation force may be applied due to the pulling operation. Therefore, the durability of the device can be improved without stress being generated in a specific part.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 2, a plate 31 is provided on the lower surface 30a of the seat cushion 30.
is installed protrudingly. The plate 31 has a pointed end 32 as shown in FIG. 1, and horizontal steps 33, 33 on opposite sides thereof.
Tapered parts 34, 34 continuous above 3, 33
Narrowed portions 35, 35 are formed.
On the other hand, a mounting hole 37 is formed in the vehicle body floor 36, and a flange 37a is formed at the edge of the mounting hole 37.
is installed vertically. A base member 38 made of a box with an open top is fitted into the mounting hole 37, and openings 39 are provided in the opposing front and rear surfaces of the base member 38. Further, a flange 40 is formed on the upper edge of the base member 38, and guides 41, 41 are provided on the upper surface of the flange 40.
are set up opposite each other. Inside this base member 38,
A U-shaped core 42 is fitted, and the core 42
As shown in FIG.
9, 39, the flange 3 of the mounting hole 37
Locking claws 43, 43 that engage with the lower surface of 7a are formed. Further, on the bottom 41a of the core 42, a fourth
As shown in the figure, a presser pawl 44 extending laterally is formed, and a stopper 45 is provided protruding from the inner surface. A pair of elastic rods 46, 46 formed by bending a single linear body having elastic restoring force are implanted in the core 42. The elastic rod 4
6, 46, the first bent portion 46a at the end is brought into contact with the stopper 45, and the first bent portion 46a is in contact with the stopper 45.
The second bent portions 46b, 46b located near point a are engaged with the presser claws 44 and held firmly. The free end portions 46c, 46c of the elastic rods 46, 46 intersect and work together to form an annular portion 47 at a midway portion located above the core 42.
is shaped so that it can be elastically engaged with the narrowed portion 35 under normal conditions. Moreover, the free end portions 46c, 46c
is loosely inserted between the guides 41, 41,
Knobs 48, 48, which are release operation pieces, are fitted to the tip.

In this embodiment of the above configuration, the base member 38, core 42, elastic rods 46, 46, etc. are installed in advance in the mounting holes 37 of the vehicle body floor 36 as described above.
Assemble it to. And seat cushion 30
When attaching the plate 3 to the annular part 47,
1 and lower the seat cushion 30. Then, the annular portion 47 is expanded by the load of the seat cushion 30 applied to the pointed end portion 32, and the plate 31 enters the annular portion 47. When the annular portion 47 and the narrowed portion 35 match due to this approach, the annular portion 47 elastically engages with the narrowed portion 35 due to the restoring force of the elastic rods 46, 46, and the annular portion
7 comes into contact with the stepped portion 33 to prevent the plate 31 from coming off. Therefore, the seat cushion 30 is fixed to the vehicle body floor 36 via the plate 31.

Next, when removing the seat cushion 30,
The knobs 48, 4 resist the restoring force of the elastic rods 46, 46.
8 in a direction that brings them closer together. This increases the diameter of the annular portion 47 and separates it from the narrowed portion 35. Therefore, if the seat cushion 30 is lifted upward while maintaining this state, the plate 3
1 is pulled out from inside the annular portion 47, and the fixation of the seat cushion 30 is released. In this way, the seat cushion 30 can be removed using the knob 48.
Since this is done by pressing in the direction of adjacent parts 48, excessive operating force is not applied as in the case of pulling, and when the diameter is increased, the annular part 4
This prevents stress from being concentrated on a specific part of 7, making it possible to obtain excellent durability.

In addition, when the narrowed part 35 is locked to the annular part 47, if the annular part 47 is located above the narrowed part 35 due to a mounting dimensional error in the vertical direction of the plate 31, or if the plate is damaged due to vibration when the passenger is seated. 31
When the annular portion 47 and the tapered portion 34 are displaced downward, the error and vibration can be absorbed by the elastic or sliding contact between the annular portion 47 and the tapered portion 34.

Effects of the Invention As explained above, the present invention is capable of reducing the constriction of the plate protruding from the lower surface of the seat cushion by pressing the release operation pieces provided at the free ends of the elastic rods in the directions that approach each other. The annular portion that engages with the seat cushion is made larger in diameter so that the seat cushion can be removed. Therefore, the seat cushion removal work is done.
This can be carried out without the need for a tensile operation that tends to apply excessive operating force, and since the diameter of the annular portion is increased by the overall elastic deformation of the elastic rod, the stress during the operation is reduced to a specific area. There is no such thing as occurring. Therefore, even if the seat cushion is removed frequently, specific parts of the fixing device will not be damaged, and excellent durability can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an exploded view showing an embodiment of the present invention, Fig. 2 is a perspective view showing the bottom surface of the seat cushion, Fig. 3 is a sectional view taken along the line shown in Fig. 1 in the assembled state, and Fig. 4. 5A is a front view showing the fixing device body of a conventional seat cushion fixing device, and FIG. 5B is a sectional view taken along the line in FIG. 3.
5C is a side view of the main body of the fixing device, FIG. 6A is a plan view showing the housing of the conventional seat cushion fixing device, and FIG. 6B is a front view of the same. Figure C is a cross-sectional view taken along the line 6 in Figure 7.
The figure is an explanatory cross-sectional view showing the assembly structure of a conventional seat cushion fixing device, FIG. 8A is a cross-sectional view showing the state of the conventional seat cushion fixing device when the seat cushion is fixed, and FIG. FIG. 3 is an explanatory cross-sectional view showing the state of the device when the seat cushion is removed. 30... Seat cushion, 30a... Lower surface,
31...Plate, 35...Narrowed portion, 36...Vehicle floor, 37...Mounting hole, 38...Base member, 46...Elastic rod, 47...Annular portion, 48...
Knob (release operation piece).

Claims (1)

[Claims] 1. A plate is provided protruding from the lower surface of the seat cushion, and narrowed portions are formed on opposing sides of the plate.A base member is fitted into a mounting hole provided in the vehicle floor, and the plate is fitted into the base member. A pair of elastic rods are implanted in the core to be attached, and an annular portion is formed in the middle of the elastic rod to engage with the narrowed portion, and the free end of the elastic rod is close to the free end portion of the elastic rod. 1. A seat cushion fixing device comprising a disengaging operation piece that can increase the diameter of the annular portion by pressing in a direction.