JP2007106230A - Inner fender and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly assembling accurate inner fender allowing sharing of a part having a large proportion occupied by standard cab and short cab in a member and its manufacturing method. <P>SOLUTION: This inner fender has a member 4 for joining having a vertical wall part 41 joined to a front side end part of a rear fender and a front side member 3 constituted to be connectable to the member 4. In a region 33 on a rear side of the front side member 3, a cut line 34 is formed. In front side region and rear side region of the cut line 34, mounting holes 35 and 36 for connection are formed. By using the mounting holes 35 and 36, the front side member 3 is connected to the member 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inner fender in a large truck (large truck) and a method for manufacturing the same.

In large lorry vehicles, a type (so-called standard cab) in which a nap bed is provided behind a cabin driver's seat is generally popular.
However, a bedless type (so-called short cab) in which the entire length of the cab is cut down in order to lengthen the loading platform length with an emphasis on the efficiency of medium / short-distance transportation is becoming widespread.

  Large automakers often share the rear panel with the rear door of the cabin in order to standardize the standard cab and the short cab.

As shown in FIG. 5, the fender 2 of the large truck 1 has an inner fender 3 as shown in FIG. 6 in order to prevent rainwater and muddy water from entering the back of the cab floor and attacks from flying stones. Is stretched. In FIG. 6, the arrow indicates the front of the vehicle.
At the rear end of the inner fender 3, the rear flange 3r is erected upward.

A rear fen 5 is disposed on the rear flange 3r.
The front end 51 of the rear fender 5 is covered with an elastic member 6 as shown in FIGS. 7 and 8, and the tip of the elastic member 6 comes into contact with the rear flange 3 r of the inner fender 3, so : See FIG. 6) is configured to prevent the splash of the hoisting roll from entering the back of the cab floor.

  The standardization of the standard cab and the short cab described above has a problem with how to share the inner fender.

  Conventionally, first, a so-called trim cut process is performed in which the inner fender 3 for a standard cab is formed into a full shape (draw) by pressing, and then the outside is cut off from the contour line of the inner fender. At the time of trim cutting, the mounting holes are also drilled.

  FIG. 9 shows a cross section of the inner fender 3 after trim cutting. In FIG. 9, the left side is the front (front) of the vehicle, and the vertical wall portion (rear flange) 3 r stands upward from the horizontal portion 31 of the inner fender 3 at the right end portion (rear end) of the inner fender 3. It is installed. Although not shown in FIG. 9, the inner fender 3 is formed with a bead as a drainage groove that also serves as a reinforcement, and a side flange is formed on the side of the inner fender 3 (not shown). ing.

In the case of a standard cab, it is used as it is as an inner fender.
When used for a short cab, first, the inner fender 3 is cut at two points of points P1 and P2 in FIG.
The mounting holes 35 (holes at the position of the point P3) and 36 are located at the position of the point P3 in the region on the left side from the point P1 (front member 33) and the position of the point P4 in the region on the right side from the point P2 (rear member 34). (A hole at the position of point P4) is formed.

  When assembling the inner fender assembly, as shown in FIG. 10, the region between point P1 and point P2 in FIG. 9 is discarded so that the mounting hole 36 of the rear member 34 fits the mounting hole 35 of the front member 33. Then, the front member 33 and the rear member 34 are joined with the mounting bolt B.

  A plurality of beads (not shown) are formed on the inner fender 3. As described above, the joining positions of the front member 33 and the rear member 34 are separated from each other before cutting, and due to the influence of these beads, vertical displacement occurs even if they are joined. Such misalignment promotes the leakage of splash to the cab side, which causes a quality problem.

As a technique related to a cab overtrack fender, a technique has been proposed in which a bead is formed over the entire width of the rear end portion of the fender to improve the rigidity of the rear end portion of the fender (see, for example, Patent Document 1).
However, the purpose of the related art is to prevent deformation of the rear end of the protruding portion of the fender, and does not solve the above-described problems.
Japanese Patent Application Laid-Open No. 2001-301662

  The present invention has been proposed in view of the above-mentioned problems of the prior art, and an inner fender that can occupy most of the members in the standard cab and the short cab, and has a high assembly accuracy, and a method for manufacturing the same. The purpose is to provide.

  The inner fender of the present invention is configured to be connectable to a joining member (T-shaped member 4) having a vertical wall portion (41) joined to the front side end portion of the rear fender, and the joining member (4). A cut line (34) is formed in the rear side region (33) of the front side member (3), and the front side region and the rear of the cut line (34) are formed. The connection attachment holes (35, 36) are formed in the region on the side, and the front side member (3) and the joining member (4) are connected using the connection attachment holes (35, 36). (Claim 1).

  The front side part (3F) of the cut line (34) of the front side member (3) cut along the cut line (34) is configured to be connectable to the joining member (T-shaped member 4). (Claim 2).

  When the uncut front side member (3) is connected to the joining member (T-shaped member 4), and the cut line (34) of the front side member (3) cut along the cut line (34). When the front part (3F) is connected to the joining member (T-shaped member 4), it can be attached to different types of cabs (claim 3).

  The inner fender manufacturing method of the present invention includes a joining member (T-shaped member 4) having a vertical wall part (41) joined to the front side end part (51) of the rear fender (5), and a joining member ( 4) and a front side member (3) configured to be connectable, and a cut line (34) is formed in a rear side region (33) of the front side member (3). 34) the front side member (3) and the joining member (4) using the connection mounting holes (35, 36) formed in the front side region (31) and the rear side region (33). It is characterized by connecting (Claim 4).

  Moreover, the attachment method of the inner fender of the present invention includes a joining member (T-shaped member 4) having a vertical wall portion (41) joined to the front side end portion (51) of the rear fender (5), and the joining fender. A front side member (3) configured to be connectable to the member (4), and a cut line (34) is formed in a region (33) on the rear side of the front side member (3). Connection attachment holes (35, 36) are formed in the front side region (31) and the rear side region (33) of the line (34), and the front side is formed using the connection attachment holes (35). Using the inner fender (3F) configured to connect the front part (3F) of the cut line (34) of the member (3) and the joining member (4), the dimensions in the longitudinal direction of the vehicle A method for manufacturing short inner fenders (300S) And a step (4-3S) of cutting the front side member (3) along the cut line (34), and a front portion (3F) of the cut line (34) of the cut front side member (3). And a step (4-4S) of connecting to the joining member (T-shaped member 4) using the connection mounting hole (35) in the vicinity of the rear side end portion (claim 5). .

  According to the inner fender of the present invention having such a configuration, the cutting position (cut line 34) of the front side member (3) when processing from the standard cab to the short cab is changed from the conventional two to one. It can be reduced and processing steps can be reduced.

  The T-shaped member (4) can be used in common, and no misalignment or the like due to surface mismatch occurs in the joint surface between the front side member (3) and the T-shaped member (4). Therefore, it is possible to prevent the splash from leaking to the back side of the floor panel.

Embodiments of the present invention will be described below with reference to the accompanying drawings (FIGS. 1 to 4).
1 and 2 show the configuration of the inner fender 300 when used for a standard cab.

Referring to FIG. 1, an inner fender 300 of a standard cab (not assembled in the state of reference numeral 300 in FIG. 1) includes a front side member 3, a T-shaped member 4, and these two members 3, 4. Fastening members (for example, bolts and nuts, nuts not shown) B to be connected.
The front member 3 includes a horizontal portion 31 and a front (left side in the drawing) inclined portion 32.
In the drawing, an L-shaped cut line (an imaginary line in which no line is actually provided) 34 is formed in the horizontal portion 31, and the cut line 34 has a vehicle front-rear direction (the left-right direction in the drawing). Two attachment holes 35, 35 are formed on the front side of the region 34a in the direction perpendicular to each other, and two attachment holes 36, 36 are formed on the rear side.

Before and after the cut line 34 of the horizontal portion 31, a bead 37 for reinforcing and securing rigidity is formed in a region excluding the region where the mounting holes 35 and 36 are formed.
Further, in the front member 3, a flange 38 is formed on the outer side edge portion of the vehicle (that is, FIG. 1 shows an inner fender on the left side of the cab).

On the other hand, the T-shaped member 4 is formed by attaching a vertical member 41 and a horizontal member 42 in a T-shape as shown in the figure, or by spot welding.
Alternatively, a single plate can be bent multiple times, and the horizontal portion (corresponding to the horizontal member 42) can be overlapped and formed.

Referring to FIG. 2, when manufacturing short cab inner fender 300 </ b> S from front side member 3 for the standard cab, the position of cut line 34 is cut (pressed) with the same blade shape as cut line 34. The member 3F on the front side of the cut line 34 is used.
Alternatively, the cut line 34 is melted by laser cutting (not shown), and the front portion 3F is used from the cut line 34.

  Then, as shown in FIG. 3, the member 3F on the front side of the cut line 34 and the T-shaped member 4 are fastened by the fastening member B and assembled to the inner fender 300S for the short cab.

  A method for manufacturing and assembling the inner fender for the short cab and the standard cab will be described with reference to the process diagram of FIG. In the figure, the standard cab process and the short cab process are common to process 4-2.

First, in Step 4-1, a steel plate 100 as a material is set on a die Md of a press machine (not shown), and the punch Mp of the press machine is lowered to perform press working.
Since the processed molded product at this time has an extra portion around the original press product, the extra portion is eliminated by a trim cut process (not shown). In the trim cut process, the mounting holes 35 and 36 are simultaneously drilled (piercing).

Step 4-2 shows a state in which the front side member 3 of the standard cab is formed by pressing, and an excess portion is removed by trim cutting.
For the assembly of the standard cab inner fender, a T-shaped member 4 formed in advance in another sub-line in Step 4-3L is prepared, and this T-shaped member 4 is assembled to the front member 3 by the fastening member B. The inner fender 300 for the standard cab is completed.

In assembling the inner fender for the short cab, the position of the cut line 34 of the front side member 3 for the standard cab is cut (pressed) with the same blade type Mc as the cut line 34 in step 4-3S.
Then, in step 4-4S, a T-shaped member 4 molded in advance in another subline is prepared on the front-side member 3F of the front member cut by the cut line 43, and the T-shaped member 4 is connected to the fastening member. B is assembled to the front member 3F, and the inner fender 300S for the short cab is completed.

  According to the inner fender of the configuration and the manufacturing method, the cut line 34 of the front side member 3 when processing from the standard cab to the short cab can be reduced from the conventional two places to one place, and the processing process can be reduced. Can be reduced.

  Moreover, according to the inner fender of the manufacturing method described above, the T-shaped member 4 can be used in common for the standard cab and the short cab, and the front side member 3 and the T-shaped member 4 are joined. There will be no misalignment due to surface mismatch. Therefore, it is possible to prevent the splash from leaking to the back side of the floor panel.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

The perspective view which showed the structure of the inner fender for standard cabs concerning embodiment of this invention. Sectional drawing of the inner fender for standard cabs concerning embodiment of this invention. Sectional drawing of the inner fender for short cabs concerning embodiment of this invention. Process drawing explaining the manufacturing method of the inner fender which concerns on embodiment of this invention. The layout which showed the positional relationship of the inner fender in a heavy-duty truck. The perspective view which showed the positional relationship of the inner fender in a prior art, a tire, and a rear fender. Sectional drawing which showed the positional relationship of the inner fender and rear fender in a prior art. The perspective view which shows the detail of the front-end | tip part of the rear fender in a prior art. Sectional drawing which showed the cutting part of two places when making the inner fender for short cabs from the inner fender for standard cabs in a prior art. Sectional drawing of the inner fender for short cabs in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cab / cabin 2 ... Fender 3 ... Front side member 4 ... T-shaped member 5 ... Rear fender 6 ... Elastic member 7 ... Splash guard 8 ... Tire 31 ... Horizontal part 34 ... cut lines 35, 35 ... mounting holes

Claims (5)

It has a joining member having a vertical wall portion joined to the front side end portion of the rear fender, and a front side member configured to be connectable to the joining member, and is cut in a rear side region of the front side member. A connection mounting hole is formed in a front side region and a rear side region of the cut line, and the front side member and the joining member are connected using the connection mounting hole. Inner fender characterized by being configured in the manner described above. The inner fender according to claim 1, wherein a front side portion of the front side member cut along the cut line is configured to be connectable to a joining member. The case where the front side member which is not cut is connected to the joining member, and the case where the front side part of the front side member cut along the cut line is connected to the joining member are different types. The inner fender of Claim 2 which can be attached to the cab of. It has a joining member having a vertical wall portion joined to the front side end portion of the rear fender, and a front side member configured to be connectable to the joining member, and is cut in a rear side region of the front side member. An assembly of an inner fender, characterized in that a line is formed and the front side member and the joining member are connected using connection mounting holes formed in a front side region and a rear side region of the cut line. Method. It has a joining member having a vertical wall portion joined to the front side end portion of the rear fender, and a front side member configured to be connectable to the joining member, and is cut in a rear side region of the front side member. A line is formed, and a connection mounting hole is formed in a front side region and a rear side region of the cut line, and the front side part of the cut line of the front side member is joined using the connection mounting hole. In the method for manufacturing an inner fender having a short dimension in the front-rear direction of the vehicle using an inner fender configured to be connected to a member for use, a step of cutting the front side member along the cut line; And a step of connecting to the joining member using a connection mounting hole in the vicinity of the rear end of the front side portion of the cut front side member. Manufacturing method of the fender.

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