JP2009126370A - Frame for truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame for a truck, which minimizes burdens on a labor and cost of both an automotive manufacturer and coachbuilder, and provides high degree of freedom in working by easing a constraint by an existing mounting hole when carrying out additional drilling work in the coachbuilder side. <P>SOLUTION: Hole positions are set in a lattice at a regular pitch with respect to a web 2 of a side rail 1, wherein mounting holes 5 in a chassis part are drilled in some hole positions having high general versatility in advance and only markings 6 are made in the other hole positions having low general versatility without drilling mounting holes. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a truck frame.

  In general, trucks with various vehicle type variations are supplied from the automaker to the bodybuilder with only the cab assembled on the frame, where various bodies such as cargo, dump trucks and tank trucks are assembled. At this time, additional equipment unique to each bodywork is added to the side rail web of the frame, or fuel tanks and battery carriers already installed at the stage of being supplied to the bodybuilder. In such a case, it is necessary to reposition the hole on the side rail web at the body manufacturer, determine the hole position, and perform additional drilling here. Mounting holes are provided.

  In addition, this additional drilling process is a heavy burden for the bodybuilder in terms of labor and cost, and as a measure to reduce these burdens, the chassis corresponding to all vehicle type variations. There has already been proposed a method in which all mounting holes for parts (equipment unique to each body, fuel tank, battery carrier, etc.) are opened in advance by the automobile manufacturer.

As prior art document information related to this type of track frame, there is the following Patent Document 1 and the like.
JP 2001-278108 A

  However, if all the mounting holes for chassis parts that correspond to all the vehicle type variations are processed by the car manufacturer, it will be necessary to make holes by the car manufacturer even if the mounting holes have low versatility. However, labor and cost are increased in processing the mounting hole that is finished without being actually used, and this causes a problem that labor burden and cost burden on the automobile manufacturer side are increased.

  In addition, when it becomes necessary to drill a new mounting hole in a place other than the hole position assumed by the car manufacturer due to circumstances on the body manufacturer side, the car manufacturer is already adjacent to the position where the mounting hole is to be drilled. There are many cases where there is a mounting hole opened on the side, and the mounting hole to be newly drilled cannot be sufficiently spaced from the existing mounting hole, or a part of the mounting hole is overlapped. Since it becomes easy to invite the situation that it becomes excessively large, there are many cases in which a new mounting hole cannot be drilled from the viewpoint of securing strength reliability.

  The present invention has been made in view of the above-described circumstances, and suppresses the burden on both labor and cost of both automobile manufacturers and bodybuilders to the necessary minimum, and additional drilling is performed on the bodybuilder side. It is an object of the present invention to provide a truck frame that can relieve restrictions due to existing mounting holes and realize machining with a high degree of freedom.

  In the present invention, hole positions are set at equal pitches in a lattice shape with respect to the side rail web, and mounting holes for chassis parts are pre-drilled in the hole positions having high versatility, while the remaining versatility is low. The present invention relates to a truck frame characterized in that only the marking is made without drilling the mounting hole at the hole position.

  Thus, in this way, when the bodywork can be assembled using only the mounting holes with highly versatile holes, the bodywork manufacturer can complete the work without any additional drilling. In addition, if the bodywork can be assembled simply by drilling additional mounting holes in the less versatile hole positions that have been marked, the markings are already omitted because the hole positions have already been determined by marking. Thus, additional drilling can be easily performed.

  At this time, since the mounting holes at the highly versatile hole positions have already been drilled, there are few cases where additional drilling is required, and even in cases where additional drilling is required, Since the number of additional mounting holes to be processed can be minimized, the labor and cost burden required for additional drilling on the bodybuilder side can be reduced.

  On the other hand, from the automaker's side, it is not necessary to machine all the mounting holes of the chassis parts corresponding to all the vehicle type variations, and it is only necessary to drill the mounting holes for highly versatile hole positions. The labor and cost burden required for drilling on the automaker side are also reduced.

  In addition, the side rail web has only mounting holes with high versatility, and the remaining low generality holes are only marked. When it becomes necessary to drill a new mounting hole in a place other than the hole position assumed by the automobile manufacturer due to the circumstances, there is already a mounting hole adjacent to the position where the mounting hole is to be drilled. Even if the marking is given, the mounting hole is not yet opened there, so that a new mounting hole can be opened without impairing the strength reliability.

  In addition, by setting the positions of the holes at a regular pitch in a grid pattern, brackets for mounting chassis parts to the side rail webs by both automobile manufacturers and bodybuilders are standardized, thereby reducing the number of parts. Thus, it is possible to reduce the cost and facilitate the transfer work of the chassis parts.

  In addition, in the present invention, when marking a hole position with low versatility, a mark is made by marking with a dent, a mark is made by etching, or a mark is made by marking with a paint. Is possible.

  According to the above-described track frame of the present invention, various excellent effects as described below can be obtained.

  (I) Pre-drilling mounting holes at highly versatile hole positions eliminates the need for additional drilling as much as possible, minimizing the number of machining even when additional drilling is required However, it is possible to easily perform drilling without marking the marked hole position, so in terms of labor and cost required for additional drilling by the bodybuilder. The burden can be greatly reduced, and it is only necessary to make mounting holes only for highly versatile hole positions without processing all mounting holes for chassis parts that correspond to all vehicle type variations on the automobile manufacturer side. Therefore, it is possible to greatly reduce the labor and cost burden required for drilling on the automobile manufacturer side.

  (II) The side rail web has only mounting holes with highly versatile hole positions, and the remaining low versatile hole positions are only marked. When it becomes necessary to drill a new mounting hole at a location other than the hole position assumed by the automobile manufacturer due to circumstances on the side, a mounting hole already exists adjacent to the position where the mounting hole is to be drilled. The number of cases is reduced, and even if markings are made, new mounting holes can be opened without compromising the strength of reliability, so the restrictions imposed by existing mounting holes are eased and the degree of freedom is high. Processing can be realized.

  (III) By setting each hole position at a regular pitch in a grid pattern, both automakers and bodybuilders can standardize brackets for attaching chassis parts to the side rail web. As a result, it is possible to reduce costs and facilitate the work of moving chassis parts.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show an example of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a pair of left and right sides (only one of them is shown here) that extends in the longitudinal direction of the track and forms the basic skeleton of the frame. Rails 2 indicate webs that vertically connect the upper flange 3 and the lower flange 4 of the side rail 1.

  Here, in the present embodiment, hole positions (positions where mounting holes 5 and markings 6 to be described later are arranged) are set at a regular pitch in a lattice shape with respect to the web 2 of the side rail 1, and among these, A highly versatile hole position (in the example shown, the hole position aligned horizontally in the uppermost stage of the web 2 and the hole position aligned horizontally in the lowermost stage of the web 2), a unique device or fuel tank in each bodywork, Mounting holes 5 for chassis parts such as a battery carrier are drilled in advance, and the remaining positions of the holes with low versatility (in the illustrated example, the second and third stages from the top of the web 2 in the horizontal direction). Only the markings 6 that are marked with dents without opening the mounting holes 5 are provided at the positions of the holes that are aligned with each other.

  However, in the example shown here, when marking 6 is made at a hole position with low versatility, the marking 6 is made by marking with a dent, but it is made by marking by etching or marking 6 or with a paint. Or marking 6 may be used.

  Thus, in this way, when the bodywork can be assembled using only the mounting holes 5 at the highly versatile hole positions, the work is completed without any additional drilling on the bodybuilder side. In addition, when the bodywork can be assembled simply by opening a new mounting hole 5 at a low versatile hole position with the marking 6, the hole position is determined by the marking 6 already marked with a recess. Therefore, it is possible to easily perform additional drilling processing by omitting ruled lines.

  At this time, since the mounting hole 5 at a highly versatile hole position has already been drilled, there are few cases where additional drilling is required, and even in cases where additional drilling is required. Since the number of additional mounting holes 5 to be processed is minimized, the labor and cost burden required for additional drilling on the body builder side can be reduced.

  On the other hand, from the automobile manufacturer side, it is not necessary to process all the mounting holes 5 of the chassis parts corresponding to all the vehicle type variations, and it is only necessary to drill the mounting holes 5 for highly versatile hole positions. For this reason, the labor and cost burden required for drilling on the automobile manufacturer side can be reduced.

  In addition, the web 2 of the side rail 1 has only the mounting holes 5 at the highly versatile hole positions, and the remaining low versatility hole positions are only provided with the markings 6 by the recesses. Therefore, when it becomes necessary to open a new mounting hole 5 in a place other than the hole position assumed by the automobile manufacturer due to circumstances on the body manufacturer side, it is adjacent to the position where the mounting hole 5 is to be opened. There are fewer cases where the mounting holes 5 already exist, and even if the marking 6 is given, the mounting holes 5 are not yet opened, but are only marked with dents, It becomes possible to open a new mounting hole 5 without impairing strength reliability.

  In addition, by setting the positions of the holes at a regular pitch in a grid pattern, both the automobile manufacturer and the body builder standardize brackets for attaching chassis parts to the web 2 of the side rail 1, thereby reducing the number of parts. It is possible to reduce costs and reduce costs, and to facilitate the work of moving chassis parts.

  Therefore, according to the above-described embodiment, by making the mounting hole 5 at a highly versatile hole position in advance, additional drilling processing is made unnecessary, and even when additional drilling processing is required Since the number of holes can be reduced to the minimum and marking can be performed easily without drilling, it is necessary for additional drilling on the bodybuilder side. The burden on labor and cost can be greatly reduced, and only the highly versatile hole positions can be obtained without processing all the mounting holes 5 of the chassis parts corresponding to all the vehicle type variations on the automobile manufacturer side. Since the mounting holes 5 need only be drilled, it is possible to greatly reduce the labor and cost burden required for drilling on the automobile manufacturer side.

  Further, since the web 2 of the side rail 1 has only the mounting holes 5 of the highly versatile hole positions, and only the markings 6 are applied to the remaining low versatile hole positions, When it becomes necessary to open a new mounting hole 5 at a place other than the hole position assumed by the automobile manufacturer due to the circumstances of the body manufacturer, the mounting hole 5 is already adjacent to the position where the mounting hole 5 is to be opened. The number of cases in which 5 is present is reduced, and even if the marking 6 is provided, the new mounting hole 5 can be opened without impairing the strength reliability. It is possible to relax the restrictions and realize a machining with a high degree of freedom.

  Furthermore, by setting the positions of the holes at a regular pitch in a grid, it is possible to standardize brackets for attaching chassis parts to the web 2 of the side rail 1 by both automobile manufacturers and bodybuilders. The number of points can be reduced to reduce the cost, and the chassis parts can be moved easily.

  The track frame according to the present invention is not limited to the above-described embodiment. The positions of the holes set at equal pitches in a lattice shape with respect to the side rail web are not necessarily limited to four stages as illustrated. It is not limited to the arrangement, and the highly versatile hole positions are not limited to those arranged in the horizontal direction at the uppermost and lowermost stages of the web as shown in the example, and other than that, it does not depart from the gist of the present invention. Of course, various changes can be made within the range.

It is a side view which shows an example of the form which implements this invention. It is sectional drawing of the II-II arrow of FIG.

Explanation of symbols

1 Side rail 2 Web 5 Mounting hole 6 Marking

Claims (4)

  Hole positions are set at regular pitches in a grid pattern on the side rail web, and mounting holes for chassis parts are drilled in advance in these highly versatile hole positions, while the remaining less versatile hole positions are A truck frame characterized by marking only without drilling mounting holes.   The track frame according to claim 1, wherein a hole position having low versatility is marked with a dent as a marking.   2. The truck frame according to claim 1, wherein a hole position having low versatility is marked by etching as a marking.   2. The truck frame according to claim 1, wherein a hole position having low versatility is marked with a paint as a marking.

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