JPH04127021U - Seat track device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a sheet track device in which cracks are less likely to occur in the bent portion formed by plastic working even when a peeling load is applied. [Structure] The present invention provides a seat track device having a lower rail fixed to a vehicle floor surface and an upper rail slidably fitted into the lower rail and fixed to the seat, in which at least one of the lower rail and the upper rail is formed by plastic working. It is bent and formed, and a protrusion extending in the same direction is provided at the longitudinal end corresponding to the bent part.

Description

[Detailed explanation of the idea]

0001

【Technical field】

The present invention relates to a seat track device for a vehicle.

0002

[Prior art and its problems]

This type of seat slide rail device 15 is used in a vehicle, for example, as shown in FIG. A lower rail 12 is fixed to both floor surfaces, and a lower rail 12 is slidably fitted to the lower rail 12. It has an upper rail 10 fixed to the seat S. Lower part of this seat S The arm 30 is provided with a belt anchor 32 to which the end of the seat belt 31 is attached. It is.

0003 As shown in FIG. 3, this lower rail 12 has a substantially box-shaped cross section, and has an upper wall 12a. It has a sliding gap 18 in the center. The upper rail 10 has an inverted T shape, that is, an L A pair of L-shaped plates 11 formed in a letter shape are joined back to back. The vertical wall 11e to be fixed to the sheet S is projected upward from the sliding gap 18. and is inserted into the lower rail 12.

0004 The bottom portion 11a of the upper rail 10 is supported by rolling support rollers 14. , has a vertical wall 11b facing upward in the figure. The lower rail 12 has a sliding gap 18. It has inner walls 12b bent inward on the left and right sides. These vertical walls 11b and inner walls The ball 13 is stored in a space surrounded by the top wall 12a, the top wall 12b, and the bottom 11a. The upper rail 10 is rolled up and down by support rollers 14 and balls 13. It is supported and smoothly moved in the front and back direction together with the seat S.

[0005] This seat track device 15 does not pose any particular problems during normal use. However, the upper rail 10 is formed by plastic working, for example, press working. In some cases, the seat belt 31 may be damaged by the arrow shown in Fig. 6 due to the weight shift of the driver due to a collision, etc. When a load in the direction of mark C is applied, it is lifted up via the belt anchor 32 and lower arm 30. A peeling load in the direction of arrow A in FIGS. 1 and 3 is applied to the arrow D portion of the pallet 10. this As shown in FIG. 4, the bent part 11c is formed by pressing. 11d may be expanded and cracked and broken as shown in FIG. Roa again Also in the rail 12, the bent part 12c formed by pressing is outwardly formed as shown in FIG. The cracks may spread and crack and break in the same manner as the bent portions 11c and 11d. There is.

[0006]

[Purpose of invention]

This invention allows bending to be performed by plastic processing even if peeling load is applied. To obtain a sheet track device in which cracks are less likely to occur in the parts.

[0007]

[Summary of the idea]

This invention consists of a lower rail that is fixed to the vehicle floor, and a slider that can slide freely on this lower rail. In a seat track device having an upper rail that is fitted and fixed to the seat , at least one of the lower rail and the upper rail is bent and formed by plastic working. , and a protrusion extending in the same direction at the longitudinal end corresponding to the bent part. It is characterized by the fact that it is provided.

[0008] With this configuration, even when a peeling load is applied, the lower rail and upper rail The bent part formed on at least one side of the A strong seat track device can be obtained.

[0009]

【Example】

The present invention will be explained below based on the illustrated embodiments. Figure 1 shows the results obtained by applying the present invention. An embodiment of the sheet track device 15 is shown, and is explained in FIGS. 3 to 6. The same reference numerals are given to the parts common to the seat track device 15 shown in FIG.

0010 Both the lower rail 12 and the upper rail 10 are subjected to plastic processing, such as press processing. It is molded by. This upper rail 10, as shown expanded in FIG. At the longitudinal end portions corresponding to the bent portions 11c and 11d (plastic deformation portions), The crack prevention protrusion (protrusion), which is a feature of the present invention, is formed by extending a distance b in the direction. It has an exit part) 16. This crack prevention protrusion 16 has a substantially semicircular shape. , other shapes may be used as long as they protrude in the longitudinal direction of the upper rail 10.

[0011] This seat track device 15 having the above configuration includes a lower rail 12 and an upper rail 10. If a peeling load is applied in the direction of arrow A in Fig. 1 during this period, as explained in Fig. The bottom 11a of the pallet 10 is connected to the vertical wall 11e, and the vertical wall 11b is connected to the bottom 11a. deforms in the direction of moving away (spreading). At this time, the bottom part 11a and the vertical wall 11b Even if cracks are generated in the bent portions 11c and 11d due to deformation, the bent portions 11c and 11d The crack prevention protrusions 16 corresponding to the molded parts 11c and 11d are provided with an upper part by a distance b. By protruding in the longitudinal direction of the rail 10, the vertical wall 11b and the bottom portion 11a are Because no force acts in the direction of expansion, cracks are less likely to form. This results in , the bent molded parts 11c and 11d are reinforced by respective crack prevention protrusions 16. This will prevent the occurrence of cracks. Therefore, the upper rail 10 The occurrence of defects such as breakage as shown in FIG. 5 is extremely reduced.

0012

[Effect of the idea]

As described above, the present invention includes a lower rail that is fixed to the vehicle floor, and a lower rail that is fixed to the vehicle floor. a seat track having an upper rail that is slidably fitted into the seat and fixed to the seat; In the equipment, at least one of the lower rail and the upper rail is bent by plastic working. Folded and formed, and extended in the same direction at the longitudinal end corresponding to the bent part Since it has a protruding part, even if a peeling load is applied, the lower rail and the The bending part of at least one of the upper rails is less prone to cracking, and therefore the seat The track device can be made strong against peeling loads.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a seat track device according to the present invention.

FIG. 2 is an expanded view showing the main parts of FIG. 1;

FIG. 3 is a longitudinal sectional view showing a seat track device that is the basis of the present invention.

FIG. 4 is a sectional view showing a state in which the sheet track device of FIG. 3 is deformed by a peeling load.

5 is a perspective view showing a state in which the upper rail of FIG. 3 is cracked and broken due to a peeling load; FIG.

FIG. 6 is a side view showing a seat track device that is the basis of the present invention.

[Explanation of symbols]

10 Upper rail 11 Vertical wall 11a Bottom 11b Vertical wall 11c Bending forming part 11d Bending forming part 11e Vertical wall 12 Lower rail 13 Ball 14 Support roller 15 Seat track device 16 Crack prevention protrusion S sheet

Claims (1)

[Scope of utility model registration request] Claim 1: A seat track device comprising a lower rail fixed to a vehicle floor surface and an upper rail slidably fitted to the lower rail and fixed to the seat, wherein at least one of the lower rail and the upper rail is bent and formed by plastic working. What is claimed is: 1. A sheet track device characterized in that a protruding portion extending in the same direction is provided at a longitudinal end portion corresponding to the bent portion.