JP2003039995A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive seat slide device with simple constitution in which sliding resistance of a sliding part is small and smooth sliding guide can be achieved without causing a noise. SOLUTION: In the sliding part 10 comprising a lower channel 4 and an upper channel 5, a sliding member 6 made of resin is outsert molded at a predetermined position in the length direction so that it covers the lower end of a base part 5a and the upper end of a rising part 5b of the upper channel 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device that supports a seat so that the seat can move back and forth.

[0002]

2. Description of the Related Art An automobile seat comprises a seat cushion and a seat back, in which a fixed rail fixed to the vehicle body floor, a movable rail fixed to the seat cushion, and a space between these rails are provided. A slide device including an intervening slide member is provided.
With this slide device, the movable rail supporting the seat is guided to the fixed rail via the sliding member, and the seat can be slid back and forth.

As a sliding member which constitutes this slide device, for example, in Japanese Patent Laid-Open Nos. 57-198128 and 58-126227, the same sliding member continuous in the longitudinal direction of a movable rail (or fixed rail) is used. A structure in which a synthetic resin material having a cross-sectional shape is outsert-molded is disclosed.

[0004]

However, in the above-described conventional seat slide device, the sliding member is outsert-molded with the synthetic resin material having the same cross-sectional shape continuous in the longitudinal direction of the movable rail (or fixed rail). Therefore, in the sliding portion including the sliding member and the fixed rail (or the movable rail), the sliding area of the sliding portion is increased due to the large contact area and the variation in the shape and dimension of each member. The dynamic resistance is likely to increase, and there is a risk that the seat may not slide smoothly.

The present invention is to solve the problems of the prior art, and has a simple structure and a low-priced sheet slide that can achieve a smooth sliding guide with a small sliding resistance of the sliding portion and no abnormal noise. The purpose is to provide a device.

[0006]

The invention of claim 1 comprises a lower channel laid on the floor so as to extend in the front-rear direction, and an upper channel for supporting the seat which is moved back and forth while being guided by the lower channel. In the seat slide device, the lower channel includes a bottom portion, side wall portions that rise upward from both sides of the bottom portion in the width direction, and fall portions that respectively inwardly descend from the side wall portions. On the other hand, the upper channel has a base portion inserted between the falling portions of the lower channel, and upwards outward from the lower end of the base portion so as to face the respective falling portions of the lower channel. And a rising part that rises, and at least at the lower end of the base of the upper channel and the upper end of the rising part in the longitudinal direction. It has a configuration in which the sliding member made of resin is outsert-molded in a fixed position.

According to the invention of claim 1, the lower end of the base portion of the upper channel contacts the upper surface of the bottom portion of the lower channel, while the upper end of the rising portion of the upper channel engages and contacts the falling portion of the lower channel. A sliding portion having a small contact area is formed.

According to a second aspect of the invention, in the seat slide device according to the first aspect, the sliding member is formed with a bulging portion which is arcuately continuous in the longitudinal direction.

According to the second aspect of the invention, the sliding portion composed of the lower channel and the upper channel slides in point contact.

The invention of claim 3 is the same as claim 1 or claim 2.
In the sheet slide device described above, an opening is provided on at least one side of the sliding member to allow the bulging portion to be vertically bent.

According to the third aspect of the present invention, even if there are variations in the shape dimensions of the lower channel, the contact portion of the upper channel in the sliding portion formed by the lower channel and the upper channel is bent up and down by the opening. As a result, variations in the shape and size of the lower channel are absorbed.

According to a fourth aspect of the invention, in the seat slide device according to the third aspect, the deflection regulating stopper portion for regulating the deflection of the bulging portion is continuous in the opening or in the lengthwise direction in an arc shape. It has the structure provided between the bulging parts.

According to the fourth aspect of the present invention, when the bulging portion is bent by receiving a load, the bending of the bulging portion is regulated to a predetermined amount by the bending regulating stopper portion. Bending is prevented.

According to a fifth aspect of the invention, in the seat slide device according to any of the second to fourth aspects, a projection for point contact is formed on at least the top of the arcuate bulging portion. Have a configuration.

According to the invention of claim 5, since the sliding portion constituted by the lower channel and the upper channel slides by the point contact by the protrusion, it is possible to further reduce the sliding resistance. At the same time, the variation in the shape and size of the lower channel is easily absorbed by the deformation of each protrusion.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a structural example of an automobile seat 1 using a slide device 3 according to the present invention.

As shown in FIG. 1, the seat 1 includes a seat cushion 11 supported by a cushion frame 2A.
Seat back 12 supported by back frame 2B
Is supported by a reclining mechanism 13 so as to be tiltable in the front-rear direction. The seat 1 includes a lower channel 4 fixed to the vehicle body floor so as to extend in the front-rear direction and an upper channel fixed to the seat cushion 11. 5
And a slide device 3 is provided. The slide device 3 guides the upper channel 5 supporting the seat cushion 11 to the lower channel 4 so that the seat 1 can be slid back and forth.

More specifically, as shown in FIG. 2, the lower channel 4 includes a bottom portion 4a, side wall portions 4b and 4b rising upward from both sides of the bottom portion 4a in the width direction, and side wall portions 4b and 4b. 4b, each of which is composed of falling portions 4c and 4c which fall downward inward.

The upper channel 5 has a base 5a having a substantially "U" -shaped cross section which is inserted between the respective falling portions 4c, 4c of the lower channel 4, and the lower end of each plate of the base 5a. Each falling part 4c of channel 4,
4c, and rising portions 5b and 5b which respectively rise upward and face each other.

The sliding member 6 is a portion which becomes a sliding portion with the lower channel 4, and is a base portion 5a of the upper channel 5.
The resin member is outsert-molded so as to cover the lower end of each plate and the entire rising portion 5b. Here, as the material of the resin member, for example, polyacetal, nylon, polypropylene or the like can be used.

As shown in FIG. 3, the upper channel 5
The outsert-molded sliding member 6 is formed with an upper bulging portion 6a and a lower bulging portion 6b which are continuous in an arc shape in the length direction, and each bulging portion 6a, 6b has a cross section in the width direction. Has a curved surface (see FIG. 2). On the upper bulging portion 6a side,
A rectangular opening 7 is provided for allowing the sliding portion 6a to bend vertically, while the sliding portion 6b is allowed to bend vertically on the lower bulging portion 6b side. The rectangular opening 8 is provided. Since the resin sliding member 6 can be molded into the upper channel 5 with a predetermined shape with high accuracy by the outsert molding, the sliding portion 10 with the lower channel 4 can be easily configured with desired accuracy. it can.

Then, as shown in FIG. 2, the lower end side of each plate of the base portion 5a of the upper channel 5 contacts the upper surface of the bottom portion 4a of the lower channel 4 through the lower bulging portion 6b of the sliding member 6, while The rising portion 5b of the upper channel 5
The sliding portion 10 having a small contact area is configured such that the upper end side of the sliding member 6 engages with the falling portion 4c of the lower channel 4 via the upper bulging portion 6a of the sliding member 6 and has a small contact area. Therefore, in the sliding portion 10, it is possible to provide a smooth sliding guide with a small sliding resistance and no abnormal noise while securing rigidity in the cross-sectional shape of both channels 4 and 5.

Further, since the resin member is outsert-molded in the upper channel 5, the rigidity of the upper channel 5 is improved, and the rigidity of the entire sliding portion 10 composed of the lower channel 4 and the upper channel 5 is improved. Therefore, stable sliding guide is possible even when a large load is applied to the sliding portion 10.

The upper bulging portion 6a and the lower bulging portion 6b of the sliding member 6 which is outsert-molded in the upper channel 5 are continuous in an arc shape in the length direction, and the width direction cross section has a curved surface. Since it is configured, lower channel 4
Since the sliding portion 10 composed of the upper channel 5 and the upper channel 5 slides in a point contact manner, the sliding resistance can be significantly reduced.

On the side of the upper bulging portion 6a of the sliding member 6 which is outsert-molded in the upper channel 5,
An opening 7 for allowing the sliding portion 6a to bend up and down
On the other hand, on the side of the lower bulging portion 6b of the sliding member 6, there is provided an opening 8 for allowing the sliding portion 6b to bend vertically. Therefore, even if there are variations in the shape and dimensions of the lower channel 4, in the sliding portion 10 composed of the lower channel 4 and the upper channel 5, the sliding portions 6a and 6b of the sliding member 6 of the upper channel 5 are formed.
Since each of the openings 7 and 8 bends up and down to absorb variations in the shape and size of the lower channel 4, it is possible to secure a good and stable sliding state.

Next, another structural example of the sliding portion of the sliding member 6 will be described.

FIG. 4 is an enlarged cross-sectional view showing an essential part of the sliding portion, and a bending regulating stopper portion 9 for regulating the bending of the upper bulging portion 6a of the sliding member 6 is opened. A configuration example in which the protrusion 14 for point contact is formed on the top of the arc-shaped upper bulging portion 6a while being provided in the portion 7 will be shown.

According to this structure, when the upper bulging portion 6a of the sliding member 6 is bent under the load, the bending of the upper bulging portion 6a by the bending regulating stopper portion 9 is a predetermined bending amount δ. Since the upper bulging portion 6a is prevented from being excessively bent because it is restricted by, the stable sliding guide can be performed even if a large load is applied to the sliding portion 10. Further, since the sliding portion 10 composed of the lower channel 4 and the upper channel 5 slides by the point contact of the protrusion 14, it becomes possible to further reduce the sliding resistance. Further, variations in the shape and size of the lower channel 4 are easily absorbed by the deformation of the protrusions 14. As a result, it is possible to secure a good and stable sliding state.

FIG. 5 shows another form different from the above, in which a bending restriction stopper portion 9'for restricting the bending of the upper bulging portion 6a of the sliding member 6 is circled in the longitudinal direction. A configuration example is shown in which the protrusions 14 for point contact are formed on the top of the arc-shaped upper bulging portion 6a while being provided between the arcs of the arc-shaped continuous upper bulging portion 6a. Even with this configuration, the same operational effects as described above can be obtained.

As described above, the seat slide device of the present invention is
It is needless to say that the configuration is not limited to the specific configuration of each of the above-described embodiments, and the configuration may be appropriately modified, added, replaced, or deleted as necessary.

For example, in the above, an example of the structure in which the resin member, which is the sliding member 6, is provided over the entire length of the upper channel 5 has been shown, but the present invention is not limited to this, and a plurality of divided resins may be used. The members may be provided at predetermined intervals in the length direction of the upper channel 5.

Further, in the above, the configuration example in which the projection 14 for point contact is provided on the top of the arcuate upper bulging portion 6a of the sliding member 6 has been shown, but the present invention is not limited to this. . For example, a projection for point contact may be provided on the top of the arcuate lower bulging portion 6b, or a projection for point contact may be provided on the side of the sliding portion. Needless to say, the combination of these protrusions can be changed as appropriate.

[0034]

As described above, according to the seat slide device of the first aspect, while the lower end of the base portion of the upper channel contacts the upper surface of the bottom portion of the lower channel,
It is possible to form a sliding part with a small contact area in which the upper end of the rising part of the upper channel engages and contacts the falling part of the lower channel. It is possible to provide a smooth sliding guide with low dynamic resistance and no abnormal noise.

According to the seat slide device of the second aspect, since the sliding portion constituted by the lower channel and the upper channel slides in point contact, the sliding resistance can be further reduced.

According to the seat slide device of the third aspect, the contact portion of the upper channel is the opening portion in the sliding portion constituted by the lower channel and the upper channel even if the lower channel has a variation in shape and dimension. As a result of bending upward and downward, variations in the shape and size of the lower channel are absorbed, and thus a good sliding state can be secured.

According to the seat slide device of the fourth aspect, when the bulging portion is bent due to a load, the bending of the bulging portion is regulated to a predetermined amount by the deflection regulating stopper portion. Since the protruding portion is prevented from flexing excessively, stable sliding guide can be performed even when a large load is applied to the sliding portion.

According to the seat slide device of the fifth aspect, since the sliding portion constituted by the lower channel and the upper channel slides by the point contact by the protrusion, the sliding resistance can be further reduced. At the same time, variations in the shape and size of the lower channel are easily absorbed by the deformation of the protrusions, so that a good and stable sliding state can be secured by these.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration example of an automobile seat using a slide device according to the present invention.

FIG. 2 is a cross-sectional view showing a vertical cross section in the width direction of the slide device according to the present invention.

FIG. 3 is a side view showing a configuration example of an upper channel obtained by outsert molding a resin sliding member used in the sliding device according to the present invention.

FIG. 4 is a cross-sectional view of an essential part showing a vertical cross section in a longitudinal direction of an upper bulging portion of a sliding member outsert-molded in an upper channel used in a slide device according to the present invention, the upper bulging portion having an opening. It is a figure which shows the example which comprises a part and comprises the stopper part for deflection | deflection control in it.

FIG. 5 is a cross-sectional view of a main part showing a vertical cross section in the longitudinal direction of the upper bulging portion of the sliding member outsert-molded in the upper channel used in the slide device according to the present invention, in which the upper bulging portion has an opening. FIG. 7 is a diagram showing an example in which a bending restriction stopper portion is provided between the arcs of the upper bulging portion by providing a portion.

[Explanation of symbols]

1 sheet 3 slide device 4 lower channel 4a bottom 4b side wall 4c Falling part 5 Upper channel 5a base 5b Rising part 6 Sliding member 6a Upper bulge 6b Lower bulge 7 openings 9,9 'Deflection restriction stopper 10 Sliding part Protrusion for 14-point contact

Claims (5)

[Claims] 1. A seat slide device comprising a lower channel laid on the floor so as to extend in the front-rear direction, and an upper channel for supporting a seat that is moved back and forth while being guided by the lower channel. Has a bottom portion, side wall portions that rise upward from both sides in the width direction of the bottom portion, and falling portions that respectively fall inwardly downward from the side wall portions, while the upper channel is the lower channel. A base portion inserted between the respective falling portions of the channel, and a rising portion which rises outward from the lower end of the base portion so as to face the respective falling portions of the lower channel, and at least this A resin sliding member is installed at predetermined positions in the length direction at the lower end of the base of the upper channel and the upper end of the rising portion. Sliding device for a seat, characterized by being bets asserted mold. 2. The seat slide device according to claim 1, wherein the sliding member is formed with a bulging portion which is continuous in an arc shape in the longitudinal direction. 3. The seat slide device according to claim 1, wherein an opening portion is provided on at least one side of the sliding member to allow the bulging portion to be bent vertically. 4. The seat according to claim 3, wherein a bending regulation stopper portion for regulating the bending of the bulging portion is provided in the opening portion or between the bulging portions which are continuous in an arc shape in the length direction. Slide device. 5. The seat slide device according to claim 2, wherein a projection for point contact is formed on at least a top portion of the arcuate bulging portion.