JPH0514942Y2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a channel-type structural member suitable for use as, for example, a cross member of a truck chassis frame.

(Prior Art) An example of a typical structure of a conventional truck chassis frame will be described with reference to FIGS. 4 to 6.
The reference numeral 10 in the drawing generally indicates a truck chassis frame, only a part of which is shown. The cross member 16 is fixed to the side rail 12 with studs 14 and has a groove-shaped cross section and is arranged in the width direction of the vehicle. The cross member 16 is
It is composed of upper and lower flange portions 16a that face each other and extend in the longitudinal direction of the vehicle body, and a web 16b that connects one side edge of these flange portions 16a. An enlarged width portion 16c is provided, the dimension of which is larger than the width of the intermediate portion. Conventionally, the direction in which the widened portion 16c extends is the same as the direction away from the web 16b, in other words, the direction in which the flange portion 16a extends from the web 16b. The significance of providing such an expanded width portion 16c is that with a normal uniform width flange, for example, only three rivets can be driven, but by providing the expanded width portion 16c, four rivets can be driven. In other words, the strength of the joint between the side rail 12 and the cross member 16 is improved, and in other words, the reliability against breakage and cracking of the riveted joint under a certain load is improved. In addition, the reason why the notch 16d is provided at the end of the web 16b as shown in FIG. This is to protect the contact parts.

When manufacturing the above-mentioned conventional cross member 16, as shown in FIG. 6, in order to make the widened portion 16c, the shaded portion A in the figure is wasted, which is extremely uneconomical in terms of board production. Note that 18 in the figure indicates a bending line.

(Problems to be Solved by the Invention) The present invention is an essential feature of a channel-type structural member in which a wide wide flange is formed at the connecting end of a truck chassis frame to other members such as side rails. The purpose of this is to significantly reduce the amount of waste material produced by improving board finishing without sacrificing its features, and to reduce its manufacturing costs.

(Means for Solving the Problems) The present invention was devised to achieve the above object, and it combines two flanges extending opposite each other and one side edge of the flange. the other side edge of the flange portion is formed linearly along the longitudinal direction, the width of the longitudinal end of the flange portion is larger than the width of the intermediate portion, and the widened portion thereof has a size equal to or less than half the width of the web and is formed in a direction opposite to the extending direction of the flange portion with respect to the web, and furthermore, the flange portion, the web, and the widened portion are formed in a single unit. The gist of this invention is a groove-shaped structural material characterized by being formed of a plate material.

(Function) According to the present invention, the width of the flange portion at the longitudinal end portion is formed larger than the width of the flange portion at the intermediate portion, and the widened portion is formed in the opposite direction to the direction in which the flange portion extends with respect to the web. Therefore, when cutting the board during manufacturing, the widened part is
By keeping the web within the height (width in case of board cutting), the generation of waste material can be minimized.

(Example) An example of the present invention will be specifically described below with reference to FIGS. 1 to 3. (Members and portions that are substantially the same as or correspond to those in the conventional configuration shown in FIGS. 4 to 6 are denoted by the same reference numerals, and redundant explanations are omitted.) According to the present invention, the cross The widened portion 16c formed at the end of the member 16 in the longitudinal direction, that is, the width direction of the vehicle, is connected to the flange 16 with respect to the web 16b.
It is formed in the opposite direction to the extending direction of a. Therefore, as shown in the board diagram of FIG.
6c is the web 1 formed between the fold lines 18
Width of 6b (height H when it becomes a cross member)
By designing it so that it fits within the notch 16d, the waste material is minimized to only the portion corresponding to the notch 16d, and the efficiency of board cutting is significantly improved. As a result, it is clear that the manufacturing cost of the cross member 16 can be effectively reduced. Furthermore, even if the widened portion 16c of the present invention is provided protruding to the opposite side from the conventional one, the advantage of improving the bonding strength between the end of the cross member and other members such as the side rail 12 is not as high as that of the conventional one. It is almost the same as the configuration. The present invention is not limited to the illustrated cross member of a truck chassis frame, but can be widely applied to various groove-shaped structural members.

(Effects of the invention) As described above, the groove-shaped structural member according to the invention includes two flanges extending opposite to each other, and a web connecting one side edge of the flange parts,
The other side edge of the flange portion is formed linearly along the longitudinal direction, and the width of the longitudinal end of the flange portion is larger than the width of the intermediate portion, and the widened portion is the width of the web. and is formed in a direction opposite to the extending direction of the flange portion with respect to the web, and further, the flange portion, the web, and the widened portion are formed of a single plate material. The structure is characterized by the fact that the bonding strength with other members is almost the same as the conventional structure, and there is no inferiority, and the manufacturing cost can be significantly reduced compared to the conventional structure.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention applied to a truck chassis frame, Fig. 2 is a front view seen from the direction of the arrow in Fig. 1, and Fig. 3 is a cross member shown in Fig. 1. Figure 4 is a plan view similar to Figure 1 of a chassis frame equipped with a conventional cross member, Figure 5 is a view from the direction of arrow V in Figure 4. The front view and FIG. 6 are plan views showing the board cutting procedure when manufacturing the cross member shown in FIG. 4. DESCRIPTION OF SYMBOLS 10... Vehicle chassis frame, 12... Side rail, 14... Stud, 16... Cross member (channel type structural member), 16a... Flange portion, 16b... Web, 16c... Widening portion.

Claims (1)

[Scope of utility model registration request] two flanges extending opposite each other;
a web that connects one side edge of the flange part, the other side edge of the flange part is formed linearly along the longitudinal direction, and the width of the longitudinal end of the flange part is equal to the width of the intermediate part. the width of the web is larger than the width of the web, and the expanded width portion thereof is not more than half the width of the web, and is formed in a direction opposite to the extending direction of the flange portion with respect to the web, and the flange portion and the web and the expanded width portion are formed of a single plate material.