JP2002037136A - Lower frame structure of cabin back guard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower frame structure of a cabin back guard capable of improving rust preventive performance by surely performing electrodeposition coating on an inner wall surface of a lower frame and capable of improving performance and reducing a cost by using a material having a high rust preventive effect and an inexpensive material by increasing material selecting choices of the lower frame. SOLUTION: In this lower frame structure of the cabin back guard 20 having a pipe member 21 bent in response to peripheral edge-shaped parts 11a and 11b of a cabin back panel 11 and the lower frame 22 installed between opposed parts 21a and 21b of the pipe member 21 and having left and right both end parts joined by welding, an opening part 49 for communicating with the outside is arranged in an under surface part 22c of the lower frame 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower frame structure of a cabin back guard (luggage carrier guard) provided on a rear surface of a cabin back panel of a truck.

[0002]

2. Description of the Related Art Generally, a cabin back guard 20 as shown in FIGS. 17 to 20 is attached to a rear surface of a cabin back panel of a lorry. This cabin back guard 20 is used as a loading angle post. Is being used. That is, the cabin back guard 20 has a rectangular cross-section, and is formed between a pipe member 21 which is entirely bent into a torii shape corresponding to the peripheral shape of the cabin back panel 11, and the facing portions 21a and 21b of the pipe member 21. And a lower frame 29 having both left and right ends joined by a full circumference welded portion 28 in a state of being installed, and a rear surface of a cabin back panel (not shown) using mounting brackets 30 and the like disposed vertically and horizontally. Mounted on The lower frame 29 is manufactured using a pipe material having a square cross section as a raw material.

As shown in FIGS. 18 and 19, the mounting bracket 30 is composed of a mounting piece 30a having a mounting hole 32 for inserting a tightening bolt (not shown) and a connecting piece 30b having a welding portion 33. And the joining piece 30
b is the pipe member 21 located on the cabin back panel side
, Respectively, and are attached by being joined to each other by a welded portion 33. Therefore, the cabin back guard 20 is screwed into the welding nut (not shown) on the cabin back panel side through the mounting hole 32 of the mounting bracket 30 joined to the pipe member 21 and tightened. It is mounted on the back of the cabin back panel.

[0004]

Incidentally, the above-mentioned cabin back guard 20 is usually subjected to electrodeposition coating for undercoating or the like. This electrodeposition coating is a coating method used for undercoating of a vehicle and the like. The object to be coated is immersed in a bath of an electrodeposition liquid (aqueous solution of a conductive paint). It is necessary to ensure that the electrodeposition liquid flows in and out of the electrode. However, in the conventional lower frame structure, as shown in FIG. 20, both end portions of the lower frame 29 and the opposing portions 21a, 21b of the pipe member 21.
Are joined to each other by the entire circumference welded portion 28, so that the electrodeposition liquid did not enter the inside of the lower frame 29, and the electrodeposition coating was not performed. As a result, the lower frame 29
There was a possibility that rust would be generated from the inside. In addition, if a hole is formed in the weld at a part of the entire circumference welded portion 28, oil for forming at the time of manufacturing the lower frame 29 blows out from the hole and becomes a dripping oil, so that post-processing is necessary. Was sometimes In addition, since the lower frame 29 uses a pipe material as a raw material, there are few choices of materials, and a general pipe material cannot select a plating material (for example, a plated steel plate) having a high rust-preventive effect. It was difficult to reduce the cost by making a selection.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to reliably perform electrodeposition coating on the inner wall surface of a lower frame and improve rust prevention. , And more material choices for the lower frame,
It is an object of the present invention to provide a lower frame structure of a cabin back guard capable of improving performance by using a material having a high rust-preventive effect or the like and reducing costs by selecting a cheap material.

[0006]

In order to solve the problems of the prior art, according to the present invention, a pipe member bent corresponding to the peripheral shape of a cabin back panel and a pipe member opposed to the pipe member are provided. In a lower frame structure of a cabin back guard provided with a lower frame which is mounted on the left and right ends thereof by welding, an opening communicating with the outside is provided in the lower frame.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIGS. 1 to 13 show a first embodiment of a lower frame structure of a cabin back guard according to the present invention. As shown in FIGS. 1 to 3, a lorry vehicle 1 includes a vehicle body 10 serving as a cabin for occupants, and a carrier 12 provided at a rear portion of the vehicle body 10 for loading luggage. On the rear side of the cabin back panel 11, which is the rear wall of the main body 10, a cabin back guard 20, which is arranged at a position above the front of the loading platform 12 and is used as a loading angle post, is attached.

The cabin back guard 20 is shown in FIGS.
As shown in FIG. 4, a square pipe having a square cross section is
a and 21b and a horizontal upper portion 21c and a pipe member 21 bent into a torii shape, and left and right ends joined by welding in a state of being bridged between lower sides of opposed portions 21a and 21b of the pipe member 21. The lower frame 22 and the rope hooking hook 25 and the load projecting piece 26 which are respectively welded and joined to each other in a state where the lower frame 22 projects above the opposing portions 21a and 21b of the pipe member 21 and below the horizontal upper portion 21c. And the entirety of the pipe member 21 is
Peripheral shape portions 11a, 11b of cabin back panel 11
Are formed in a frame shape corresponding to. The cabin back guard 20 includes a pair of left and right upper mounting brackets 23 and lower mounting brackets 2 that are disposed to face each other.
The use of four or the like allows the cabin back panel 11 to be fixedly fastened to the cabin back panel 11 at four locations, up, down, left and right.

The upper mounting bracket 23 is attached to the pipe member 21 at a position below the hook 25 for hooking the rope and the projecting piece 26 for hanging, and projects obliquely upward toward the outside of the vehicle. As shown in the figure, a bracket main body 41 having a high rigidity and having a hat-shaped cross section having sufficient strength against deformation is provided. That is, the bracket body 41 has a flat bottom portion 41a.
And a circular bottom fastening portion 41b located one step lower than the bottom surface portion 41a; a vertical wall portion 41c standing around the bottom surface portion 41a and the bottom surface fastening portion 41b; and a vertical wall portion 41c. The upper surface portion 41d extending horizontally outward around the upper end of the upper surface portion, and the outer peripheral edge of the upper surface portion 41d is bent toward the cabin back panel 11 side (in the direction opposite to the loading platform 12) to improve strength and appearance. Terminal part 4 for achieving
1e, and a mounting hole 32 into which the tightening bolt 31 is inserted is formed in the bottom surface tightening portion 41b.
The upper mounting bracket 23 includes a bracket body 4.
Extension portion 4 formed by extending a part of bottom surface portion 41a
The extension 42 is formed in a planar shape so that the pipe member 21 can be brought closer to the cabin back panel 11 and the carrier 12 can be widened.

Therefore, the joining portions of the upper mounting bracket 23 to the pipe member 21 are provided at two places on the front surface of the pipe member 21 on the side of the cabin back panel 11 and side surfaces intersecting the front surface. That is, the upper mounting bracket 2
As shown in FIG. 6, the first welded portion 27 a where the vertical wall portion 41 c, the upper surface portion 41 d, and the upper surface terminal portion 41 e of the bracket main body 41 abut on the side surface of the pipe member 21, The second portion of the portion where the extension 42 overlaps the front surface of the pipe member 21 on the cabin back panel 11 side
They are joined to each other by a welded portion 27b, so that a sufficient joining force can be provided between the upper mounting bracket 23 and the pipe member 21.

On the other hand, on the front side (cabin side) of the cabin back panel 11, as shown in FIG. 8, a rear pillar inner panel 13 and a shoulder anchorage reinforcement 14 are arranged in an overlapping state. Bolt holes 43, 44, and 45 for inserting the shaft portions of the tightening bolts 31 are formed at corresponding positions of the back panel 11, the inner panel 13, and the reinforcement 14. Further, a welding nut 46 to be screwed with the tightening bolt 31 is fixed to the front side of the reinforcement 14 in correspondence with the bolt hole 45.

Incidentally, the lower mounting bracket 24 is shown in FIG.
19 has the same structure as the mounting bracket 30 shown in FIG.
And protrude substantially horizontally in directions facing each other. The lower mounting bracket 24 is
As shown in FIGS. 9 to 11, the joint piece 24 includes a mounting piece 24 a having a mounting hole 32 into which the tightening bolt 31 is inserted, and a joining piece 24 b having a welding portion 33.
b is superimposed on the front surface of the pipe member 21 located on the cabin back panel 11 side, and is attached by welding with a welding portion 33. As shown in FIG. 11, a cabin back wind member 15, a rear pillar inner panel 13, and a shoulder anchorage reinforcement 14 are arranged in a front side (cabin side) of the cabin back panel 11 in an overlapping manner. These back panels 11,
Bolt holes 43, 47, 44, and 45 for inserting the shaft portion of the tightening bolt 31 are formed at corresponding positions of the wind member 15, the inner panel 13, and the reinforcement 14. Further, a welding nut 46 to be screwed with the tightening bolt 31 is fixed to the front side of the reinforcement 14 in correspondence with the bolt hole 45.

The lower frame 22, which is a feature of the present invention, is disposed horizontally along the vehicle width direction. As shown in FIG. 12 and FIG. 13, the lower frame 22 uses a pipe material having a square cross section,
Alternatively, it is formed in a rectangular cross section using a plate material that can be bent and formed, and a front surface portion 22a on the cabin back panel 11 side in a state where both left and right end portions abut against inner side surfaces of the opposed portions 21a and 21b of the pipe member 21. And loading platform 12
Side rear surface 22b and opposing portions 21a, 21 of pipe member 21
1b are joined to each other by a welded portion 48. Further, an opening 49 communicating with the outside is provided in the lower surface 22c of the lower frame 22 over the entire width of the vehicle, and the lower frame 22 is formed to have a downward substantially U-shaped cross section by the opening 49. ing. In addition, the lower surface 22c of the lower frame 22 is provided with a hem-shaped portion 50 formed by a hemming process in which the front and rear edges of the opening 49 are folded inward. Further, on the joint portion side of the pipe member 21 with the facing portions 21a and 21b,
The upper surface portion 22d of the lower frame 22 is partially cut out to form a flat U-shaped notch portion 5 communicating with the outside.
1 are provided.

In order to mount the cabin back guard 20 of the first embodiment of the present invention on the rear side of the cabin back panel 11, first, the pipe member 21 and the lower frame 22 are assembled by welding and joining. The upper mounting bracket 23 and the lower mounting bracket 24 are joined to the pipe member 21, and the cabin back guard 20 is assembled in advance in a state shown in FIG. Next, as shown in FIG. 3, holding the cabin back guard 20, the upper mounting bracket 23 and the lower mounting bracket 24 overlap the cabin back panel 11, and the mounting holes 32 are bolt holes 43.
To the position. Thereafter, the tightening bolt 31 is inserted from above into the corresponding mounting hole 32 and the bolt holes 43, 44, 45,
47 and screwed into the welding nut 46 to tighten it. Then, the cabin back guard 20 is attached to the rear surface of the cabin back panel 11 (see FIGS. 2, 8 and 11).

In the cabin back guard 20 according to the first embodiment of the present invention, an opening 49 communicating with the outside is provided on the lower surface 22c of the lower frame 22 constituting the cabin back guard 20 throughout the vehicle width direction. During the electrodeposition coating of the back guard 20, the electrodeposition liquid easily enters the inside of the lower frame 22 through the opening 49,
Electrodeposition coating can be firmly performed on the inner wall surface of the lower frame 22, and the rust prevention of the lower frame 22 can be enhanced. Moreover,
The lower surface 22c of the lower frame 22 is provided with the hem-shaped portion 50 formed by folding the front and rear edges of the opening 49 inward, so that the rigidity is maintained even if the opening 49 is present, and the appearance is not impaired. Only In addition, since the lower frame 22 of the present embodiment has a downward U-shaped cross section due to the opening 49, a plate material can be used instead of a pipe material as a raw material. It is possible to improve the performance by using a plated steel plate having a high rust-preventive effect, which is not available in the material, and to reduce the cost by using an inexpensive material.

In the lower frame 22 of the present embodiment, a notch 51 communicating with the outside is provided on an upper surface 22d located on the side of the pipe member 21 joined to the facing portions 21a and 21b. Therefore, during the electrodeposition coating, the air accumulated inside the lower frame 22 escapes from the notch 51. Therefore, the electrodeposition liquid easily enters the inside of the lower frame 22, and the lower frame 22
The inner wall surface has better electrodeposition coating, and the rust prevention can be improved.

FIG. 14 shows a second embodiment of the lower frame structure of the cabin back guard according to the present invention.
The structure of the second embodiment is different from that of the first embodiment in that the lower frame 52 having a rectangular cross section is formed by cutting out the center of the lower surface 52c leaving the lower surface corner 52e. The difference is that an opening 59 is provided in the lower surface 52c of the opening 52. Other configurations and the procedure for attaching the cabin back guard 20 are the same as those in the first embodiment. Therefore, according to the lower frame structure of the second embodiment of the present invention, the electrodeposition coating can be firmly performed on the inner wall surface of the lower frame 52, and the rust prevention of the lower frame 52 can be enhanced. Moreover, the lower surface 52c of the lower frame 52 has the lower surface corner 52e, so that the rigidity can be maintained even if the opening 59 exists, and the molding of the lower frame 52 becomes easy. Other effects are the same as those of the first embodiment.

FIGS. 15A and 15B show a third embodiment of the lower frame structure of the cabin back guard according to the present invention. The structure of the third embodiment is different from that of the first embodiment in that the lower frames 62 and 72 are formed in a circular cross section or an elliptical cross section.
Openings 69 and 79 are provided in the lower surfaces 62c and 72c of the base plates 2 and 72, and the hem-shaped portion 50 is provided by folding the edges of the openings 69 and 79 inward. Other configurations and the procedure for attaching the cabin back guard 20 are the same as those in the first embodiment. Therefore, according to the lower frame structure of the third embodiment of the present invention, the lower surface portions 62 of the lower frames 62, 72 having a circular or elliptical cross section.
Since openings 69 and 79 are provided in c and 72c, the first
The same effects as in the embodiment can be obtained.

FIG. 16 shows a fourth embodiment of the lower frame structure of the cabin back guard according to the present invention.
The structure of the fourth embodiment is different from that of the first embodiment in that an opening 89 is provided in a front portion 82a on the cabin back panel 11 side of a lower frame 82 having a rectangular cross section. The hem-shaped part 50 is provided by folding the edge of the part 89 inward, and the lower frame 82 is formed in a substantially U-shaped section facing forward. For other configurations and the installation procedure of the cabin back guard 20,
This is the same as the first embodiment. Therefore, according to the lower frame structure of the fourth embodiment of the present invention, since the opening 89 is provided in the front portion 82a on the cabin back panel 11 side of the lower frame 82, the opening of the opening 89 is not impaired. It is possible to increase the area, and by providing the opening 89 with an air venting effect, the notch 51
Need not be provided, and the cost can be reduced by reducing the processing cost. Other effects are the same as those of the first embodiment.

The embodiments of the present invention have been described above.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention. For example, the cross-sectional shape of the lower frame is not limited to that of each of the above-described embodiments, and can be appropriately selected according to the type of vehicle to be applied.

[0022]

As described above, the lower frame structure of the cabin back guard according to the present invention is provided between the pipe member bent corresponding to the peripheral shape of the cabin back panel and the facing portion of the pipe member. Since the lower frame has a lower frame to which both left and right ends are welded, and the lower frame has an opening communicating with the outside, the electrodeposition coating can be reliably performed on the inner wall surface of the lower frame. ,
Rust prevention ability can be improved. Moreover, in the lower frame structure of the present invention, not only pipe material but also plate material can be used as a raw material of the lower frame, so that the choice of materials is increased, and the performance is improved and the cost is improved by using materials having high rust prevention effect and cheap materials. Down can be planned. Further, in the lower frame structure of the present invention, if the lower edge of the lower frame having various cross-sectional shapes or the edge of the opening provided on the front surface on the cabin back panel side is folded inward to form a hem shape, even if there is an opening, Rigidity can be maintained and a good appearance can be obtained. In addition, in the lower frame structure of the present invention, if a notch communicating with the outside is provided on the upper surface of the lower frame, which is on the joint side with the facing portion of the pipe member, air is supplied from the inside of the lower frame during electrodeposition coating. As a result, the electrodeposition liquid easily enters the inside of the lower frame, the electrodeposition coating is improved, and the rust prevention ability can be further improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a lorry to which a lower frame structure of a cabin back guard according to a first embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a cabin back guard attached to a rear surface of a cabin back panel of the truck shown in FIG.

FIG. 3 is a perspective view showing a cabin back guard in a state before being attached to a rear surface of a cabin back panel of the truck shown in FIG. 1;

FIG. 4 is a front configuration diagram showing a cabin back guard according to the first embodiment of the present invention.

FIG. 5 is a perspective view of the vicinity of the upper mounting bracket of the cabin back guard having the lower frame structure according to the first embodiment of the present invention, as viewed from the loading platform side.

FIG. 6 is a perspective view of the vicinity of the upper mounting bracket of the cabin back guard having the lower frame structure according to the first embodiment of the present invention as viewed from the cabin back panel side.

FIG. 7 is a perspective view showing an upper mounting bracket of a cabin back guard having a lower frame structure according to the first embodiment of the present invention.

FIG. 8 is a sectional view taken along line AA in FIG. 2;

FIG. 9 is a perspective view of the vicinity of the lower mounting bracket of the cabin back guard having the lower frame structure according to the first embodiment of the present invention, as viewed from the loading platform side.

FIG. 10 is a perspective view of the vicinity of the lower mounting bracket of the cabin back guard having the lower frame structure according to the first embodiment of the present invention, as viewed from the cabin back panel side.

FIG. 11 is a sectional view taken along the line BB in FIG. 2;

FIG. 12 is a view as viewed in the direction of the arrow Z in FIG. 4;

FIG. 13 is a sectional view taken along line CC in FIG. 4;

FIG. 14 is a sectional view showing a lower frame used in a lower frame structure according to a second embodiment of the present invention.

FIGS. 15A and 15B are cross-sectional views showing a lower frame used in a lower frame structure according to a third embodiment of the present invention.

FIG. 16 is a sectional view showing a lower frame used in a lower frame structure according to a fourth embodiment of the present invention.

FIG. 17 is a front structural view showing a cabin back guard having a conventional lower frame structure.

FIG. 18 is a perspective view of the vicinity of an upper mounting bracket of a cabin back guard having a conventional lower frame structure, as viewed from a carrier side.

FIG. 19 is a perspective view of the vicinity of an upper mounting bracket of a cabin back guard having a conventional lower frame structure as viewed from a cabin back panel side.

20 is a sectional view taken along line CC in FIG.

[Explanation of symbols]

 Reference Signs List 1 lorry vehicle 10 vehicle main body 11 cabin back panel 12 carrier 13 rear pillar inner panel 14 shoulder anchorage reinforcement 15 cabin back wind member 20 cabin back guard 21 pipe member 21a, 21b facing part 21c horizontal upper part 22, 52, 62, 72, 82 Lower frame 22a, 52a, 62a, 72a, 82a Front part 22b, 52b, 62b, 72b, 82b Rear part 22c, 52c, 62c, 72c, 82c Lower part 22d, 52d, 62d, 72d, 82d Upper part 23 Upper mounting bracket 24 Lower mounting bracket 27a, 27b Welding part 31 Tightening bolt 32 Mounting hole 41 Bracket body 42 Extension part 43, 44, 45, 47 Bolt hole 46 Welding nut 48 Welding part 49, 59, 6 9, 79, 89 Opening 50 Hem-shaped portion 51 Notch 52e Lower surface corner

Claims (6)

[Claims] 1. A cabin comprising: a pipe member bent corresponding to a peripheral shape of a cabin back panel; and a lower frame provided between opposed portions of the pipe member and joined at right and left ends by welding. The lower frame structure of a cabin back guard, wherein an opening communicating with the outside is provided in the lower frame of the back guard. 2. The opening is provided on a lower surface of a lower frame having a square cross section, and an edge of the opening is turned inward to form a hem shape, and the lower frame has a downward substantially U-shaped cross section. The lower frame structure of a cabin back guard according to claim 1, wherein the lower frame structure is formed in a shape. 3. The lower frame is formed in a rectangular shape in cross section, and the opening is provided in the lower surface of the lower frame by cutting off the center of the lower surface while leaving the lower surface corner of the lower frame. The lower frame structure of the cabin back guard according to claim 1, wherein the lower frame structure is provided. 4. The opening according to claim 1, wherein the opening is provided on a lower surface of a lower frame having a circular cross section or an elliptical cross section, and an edge of the opening is turned inward to form a hem shape. 2. The lower frame structure of the cabin back guard according to 1. 5. A notch communicating with the outside is provided on an upper surface of the lower frame on a joint portion side of the pipe member with an opposing portion. 2. The lower frame structure of the cabin back guard according to 1. 6. The opening is provided on a front surface on the side of the cabin back panel of a lower frame having a rectangular cross section, and an edge of the opening is folded inward to form a hem shape. The lower frame structure of a cabin back guard according to claim 1, wherein the lower frame structure is formed in a substantially U shape.