JP3820836B2 - Carrier mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a carrier mounting structure for mounting a heavy object such as a CNG cylinder on a roof of a vehicle such as a bus.
[0002]
[Prior art]
Conventionally, diesel engines that use light oil as fuel have been common as bus engines, but in recent years buses (CNG cars) equipped with engines that can use CNG (compressed natural gas) as fuel have also been put into practical use. Yes.
By the way, in the route bus, from the viewpoint of barrier-free for the elderly and the disabled, a low floor no-step vehicle having no step between the sidewalk and the floor has been developed and put into practical use. Even in such a no-step vehicle, it is desirable to use CNG as a fuel for reducing pollution. However, in the case of a no-step vehicle, there is no space for mounting a CNG cylinder under the floor because of the low floor. . Therefore, the CNG cylinder is inevitably mounted on the roof.
[0003]
[Problems to be solved by the invention]
In order to mount the CNG cylinder on the roof, it is necessary to attach a carrier for mounting the CNG cylinder on the roof. However, since the roof panel forming the roof is extremely thin, the carrier is directly welded to the roof panel. Will cause distortion in the roof panel. Therefore, instead of welding the carrier directly to the roof panel, a reinforcing bracket is arranged inside the roof panel, and the roof panel is sandwiched between the reinforcing bracket and the bracket on the carrier side and bolted. A method for mounting the carrier on the roof was proposed.
[0004]
However, since the roof panel is formed in a curved shape, it is deformed and waved when sandwiched between the brackets, and it is difficult to sufficiently secure the sealing property of the mounting surface of the carrier side bracket. Further, since the bolt cannot be securely tightened due to the deformation of the roof panel, the bolt may gradually loosen during use.
The present invention was devised in view of such problems, and an object of the present invention is to provide a carrier mounting structure that enables reliable mounting of the carrier and sufficiently secures the sealing performance of the mounting surface. And
[0005]
[Means for Solving the Problems]
Therefore, in the carrier mounting structure of the present invention, a mounting hole is formed in the roof panel forming the roof of the vehicle, and a spacer formed thicker than the roof panel is provided in the mounting hole and provided on the carrier. The carrier-side mounting member and the vehicle-side mounting member disposed inside the roof panel are sandwiched, and a seal member is disposed so as to surround the mounting hole, and the seal member is attached to the carrier-side mounting member and the roof panel. Between them.
[0006]
Preferably, a through hole is formed in the spacer, and the carrier side mounting member and the vehicle side mounting member are fastened by a bolt passing through the through hole.
More preferably, the seal member is formed of an elastic member having a thickness greater than that of the spacer.
More preferably, the sealant is applied to the gap between the carrier-side mounting member and the roof panel at the outer periphery of the seal member.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
1 to 9 show a carrier mounting structure as one embodiment of the present invention. As shown in FIG. 1, the no-step vehicle (vehicle) 1 has a low floor 2 in the passenger cabin, and therefore there is no space for mounting the CNG cylinder 4 under the floor. Therefore, the carrier 10 is attached on the roof 3 and the CNG cylinder 4 is mounted on the carrier 10.
[0008]
As shown in FIG. 2, the carrier 10 includes a mounting table (carrier body) 11 and covers 12 and 13 that can be freely opened and closed. The mounting table 11 is long in the front-rear direction of the vehicle 1, and the end portions of the covers 12 and 13 are rotatably connected to the front end portion and the rear end portion. Three CNG cylinders 4 are mounted on the mounting table 11 in parallel in the front-rear direction of the vehicle 1. And it fixes to the mounting base 11 with the fixing tool 15 in the state positioned by aligning the direction of the valve 4a. A plurality of (here, three) brackets 16 are provided on the left and right sides of the mounting table 11.
[0009]
Hereinafter, the carrier mounting structure when the carrier 10 is mounted on the roof 3 of the no-step vehicle 1 will be described with reference to FIGS.
First, the general roof structure of a bus will be described with reference to FIGS. 3 and 4. The roof 3 of the bus is formed by supporting a roof panel 5 with the following frame structure.
[0010]
That is, two roof rails 20 are extended along the inner surface of the roof panel 5 from the front part to the rear part of the vehicle 1. The roof rails 20 are respectively disposed on the left and right side portions of the vehicle 1, and a plurality of roof bows 21 are installed between the left and right roof rails 20, 20 along the inner surface of the roof panel 5 in the vehicle width direction. The roof rail 20 is a square pipe having a closed cross section, whereas the cross section of the roof bow 21 is formed in a hat-shaped cross section that is convex upward. The roof rail 20 and the roof bow 21 are joined by welding the end of the roof bow 21 to the roof rail 20.
[0011]
A plurality of stiffeners 22 are installed between the adjacent roof bows 21 and 21 in parallel with the roof rail 20. Here, as shown in FIG. 4, six stiffeners 22 are installed symmetrically with respect to the center line in the front-rear direction of the vehicle 1, and are arranged in a row in the front-rear direction of the vehicle 1. As for the cross-sectional shape of the stiffener 22, the central four are hat-shaped cross sections protruding upward, and the two at the left and right ends are L-shaped cross sections. The stiffener 22 and the roof bow 21 are coupled by welding the end of the stiffener 22 to the roof bow 21.
[0012]
Further, a pair of window upper rails 23, 23 extend in the front-rear direction of the vehicle 1 in parallel with the roof rail 20 on the vehicle window (not shown) outside the roof rails 20, 20 in the vehicle width direction. A plurality of side rail bows (reinforcing members) 24 are disposed between the roof rail 20 and the window upper rail 23, one end is welded to the roof rail 20 and the other end is welded to the window upper rail 23. The window upper rail 23 is a square pipe with a closed cross section, similar to the roof rail 20, and the cross-sectional shape of the side rail bow 24 is also formed with a closed cross section. The side rail bow 24 is basically disposed on the extended line of the roof bow 21.
[0013]
As described above, the roof rail 20, the roof bow 21, the stiffener 22, the window upper rail 23, and the side rail bow 24 are assembled and joined together by welding to form a framework of the roof 3. And the roof 3 is formed by mounting the roof panel 5 on this frame structure, and welding an appropriate location.
[0014]
The strength members that can withstand the load most in the roof structure are the roof rail 20 and the window upper rail 23 formed in a closed cross section. Therefore, if the carrier 10 is attached so that a load is applied to these members, a heavy object such as the CNG cylinder 4 can be mounted without requiring large-scale reinforcement.
Therefore, in the roof structure according to the present embodiment, the carrier 10 is attached using the side rail bow 24 that connects the roof rail 20 and the window upper rail 23. That is, as shown in FIG. 5, a pair of side rail bows 24, 24 are arranged in accordance with the position of the bracket 16 of the carrier 10 described above, and a support bracket (vehicle side) is provided between the pair of side rail bows 24, 24. A mounting member 25 is installed.
[0015]
In addition, the position of the side rail bow 24 is shifted or increased as necessary. In FIG. 5, the side rail baud 24 indicated by reference signs 24 </ b> A to 24 </ b> I remains at the position shown in FIG. 4, but the side rail bauds 24 indicated by reference signs 24 </ b> J and 24 </ b> K are shifted in position. The side rail bow 24 shown in FIG.
[0016]
As shown in FIG. 6, the support bracket 25 is formed in an L shape including a support surface 26 and a reinforcing surface 27. Both side portions 26a, 26a and end portions 26b of the support surface 26 and both side portions 27a, 27a of the reinforcing surface 27 are bent inward, and the end portions 27b of the reinforcing surface 27 are bent outward. In addition, two pairs of bolt holes 28 are formed in the support surface 26.
[0017]
FIG. 7 is a view showing a mounting state of the support bracket 25. As shown in FIG. 7 (cross-sectional view taken along the line B-B in FIG. 5), the support bracket 25 is disposed such that the support surface 26 is substantially flush with the upper surface 24 a of the side rail bow 24. Is in contact with the inner surface of the roof panel 5. The side portion 26 a of the support surface 26 and the side portion 27 a of the reinforcing surface 27 are welded to the side surface 24 b of the side rail bow 24, and the end portion 26 b of the support surface 26 is welded to the side surface 20 a of the roof rail 20. As a result, a box composed of the left and right side rail bows 24, 24, the roof rail 20 and the support bracket 25 is formed, and the rigidity of the support surface 26 is ensured. Further, a notch hole 5 a is formed at a portion of the roof panel 5 in contact with the support surface 26 so as to surround the bolt holes 28, 28.
[0018]
The carrier 10 is attached to the roof 3 through the support bracket 25 welded to the side rail bow 24 and the roof rail 20 as described above. Hereinafter, the attachment structure to the roof 3 of the carrier 10 is explained in full detail.
As shown in FIGS. 8 and 9, bracket supports (carrier-side mounting members) 30 are respectively attached to the lower portions of the brackets 16 provided on the mounting table 11 by bolts 31 and nuts 32. Bolt holes (through holes) 34, 34 are formed in the left and right flange portions 33, 33 of the bracket support 30 corresponding to the bolt holes 28, 28 of the support bracket 25, respectively. Furthermore, spacers 35 and 35 are welded to the lower surfaces of the flange portions 33 and 33 corresponding to the positions of the left and right cutouts 5a and 5a, respectively. The spacer 35 is at least thicker than the roof panel 5 and smaller than the notch 5a. The bolt hole 34 is also formed in the spacer 35.
[0019]
The carrier 10 is attached to the roof 3 by combining the bracket support 30 and the support bracket 25 described above. That is, as shown in FIGS. 8 and 9, the left and right spacers 35, 35 provided on the bracket support 30 are inserted into the corresponding cutout holes 5 a, 5 a, and are coupled to the support surface 26 of the support bracket 25. It is like that. The spacer 35 is coupled to the support surface 26 by fastening bolts 37 through bolt holes 28 and 34 and nuts 38.
[0020]
Further, when the spacer 35 is inserted into the notch hole 5a, an annular packing (seal member) 36 surrounding the notch hole 5a is sandwiched between the lower surface of the flange portion 33 of the bracket support 30 and the roof panel 5. It is like that. The packing 36 is an elastic member such as rubber (for example, butyl rubber). The inner peripheral portion is larger than the cutout hole 5 a and the outer peripheral portion is smaller than the lower surface of the flange portion 33. The wall thickness is formed larger than the wall thickness of the spacer 35. Therefore, when the bracket support 30 and the support bracket 25 are fastened by the bolt 37 and the nut 38, the packing 36 is compressed between the lower surface of the flange portion 33 and the roof panel 5 as shown in FIG. The gap between 33 and the roof panel 5 is sealed. The packing 36 is preferably bonded in advance to an appropriate position on the lower surface of the flange portion 33 with an adhesive from the viewpoint of workability.
[0021]
As described above, the periphery of the notch hole 5a is sealed by narrowing the packing 36 between the lower surface of the flange portion 33 of the bracket support 30 and the roof panel 5, but in this embodiment, further sealing performance is secured. Therefore, the sealing agent 39 is applied to the gap between the lower surface of the flange portion 33 on the outer peripheral portion of the packing 36 and the roof panel 5 and the head of the bolt 37.
[0022]
Since the carrier mounting structure according to an embodiment of the present invention is configured as described above, the bracket support 30 on the carrier 10 side and the support bracket 25 on the vehicle 1 side do not sandwich the roof panel 5, and the spacer 35. It is directly coupled via.
For this reason, there is an advantage that the rigidity between the bracket support 30 and the support bracket 25 can be sufficiently secured, and the carrier 10 can be securely attached.
[0023]
In this embodiment, the bracket support 30 and the support bracket 25 are not joined by welding, but are fastened by bolts 37 and nuts 38. However, the bracket support 30 and the support bracket 25 are interposed via the spacer 35. Since the contact is made by metal touch, torque management at the time of fastening by the bolt 37 and the nut 38 is easy, and there is an advantage that sufficient mounting reliability can be ensured.
[0024]
Further, since the load is not applied to the roof panel 5 by directly coupling the bracket support 30 and the support bracket 25, the roof panel 5 is not bent. Therefore, the periphery of the cutout hole 5a of the roof panel 5 is flat, and the sealing performance of the cutout hole 5a is ensured only by narrowing the packing 36 surrounding the cutout hole 5a between the roof panel 5 and the bracket support 30. There is also an advantage that it can be done.
[0025]
In particular, since the packing 36 is formed of an elastic member thicker than the spacer 35, the bracket support 30 is compressed between the bracket support 30 and the roof panel 5 when the bracket support 30 is attached to the support bracket 25. The gap between the bracket support 30 and the roof panel 5 can be reliably sealed. In addition, since the compression of the packing 36 is restricted to a predetermined amount by the spacer 35, it is advantageous for ensuring the durability of the packing 36.
[0026]
Further, by applying the sealing agent 39 to the gap between the bracket support 30 and the roof panel 5 on the outer peripheral portion of the packing 36 and the head of the bolt 37, it is possible to further secure the sealing performance.
Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the spacer 35 is welded to the bracket support 30 in advance from the viewpoint of workability. However, the spacer 35 may be separately provided and fastened by the bolt 37 and the nut 38 at the time of attachment. Alternatively, the spacer 35 and the support bracket 25 may be welded.
[0027]
In the above-described embodiment, the support bracket 25 and the bracket 16 of the mounting table 11 are coupled via the bracket support 30, but the support bracket 25 and the bracket 16 of the mounting table 11 are directly fastened. May be.
Furthermore, the application target of the carrier mounting structure of the present invention is not limited to a bus, but is applicable to general vehicles including automobiles, trucks, and railways.
[0028]
【The invention's effect】
As described above in detail, according to the carrier mounting structure of the present invention, the carrier side mounting member and the vehicle side mounting member are directly coupled via the spacer without sandwiching the roof panel. And the vehicle side mounting member can be sufficiently secured, and there is an advantage that the carrier can be securely mounted.
[0029]
Further, since the roof panel does not bend by directly coupling the carrier side mounting member and the vehicle side mounting member and the periphery of the roof panel mounting hole is flat, the sealing member surrounding the mounting hole is defined as the roof panel. There is also an advantage that the sealing performance of the mounting hole can be ensured only by narrowing between the carrier side mounting member (claim 1).
[0030]
Further, when a through hole is drilled in the spacer and the carrier side mounting member and the vehicle side mounting member are fastened by a bolt passing through the through hole, the carrier side mounting member and the vehicle side mounting member are connected to the metal via the spacer. Since contact is made by touch, torque management at the time of fastening with bolts is facilitated, and there is an advantage that sufficient mounting reliability can be ensured (claim 2).
[0031]
Further, when the seal member is formed of an elastic member thicker than the spacer, the seal member is compressed between the carrier side mounting member and the roof panel when the carrier side mounting member is attached to the vehicle side mounting member. Therefore, there is an advantage that the gap between the carrier side mounting member and the roof panel can be reliably sealed (Claim 3).
[0032]
Furthermore, when a sealing agent is applied to the gap between the carrier side mounting member and the roof panel at the outer peripheral portion of the sealing member, there is an advantage that the sealing performance of the mounting hole can be ensured more. ).
[Brief description of the drawings]
FIG. 1 is a side view of a CNG no-step vehicle to which a carrier mounting structure according to an embodiment of the present invention is applied.
FIG. 2 is a perspective view of a carrier according to a carrier mounting structure as one embodiment of the present invention.
FIG. 3 is a perspective view of a general bus, with a roof panel partially broken away.
4 is a plan view as viewed in the direction of arrow A in FIG. 3 showing a general bus roof structure.
FIG. 5 is a plan view showing a roof structure of a bus according to a carrier mounting structure as one embodiment of the present invention.
FIG. 6 is a perspective view of a support bracket according to a carrier mounting structure as one embodiment of the present invention.
7 is a cross-sectional view taken along the line B-B in FIG. 5 showing a mounting state of the support bracket according to the mounting structure of the carrier as one embodiment of the present invention.
FIG. 8 is a schematic diagram showing a carrier mounting structure as one embodiment of the present invention.
FIG. 9 is a cross-sectional view of a main part showing a mounting structure of a carrier as one embodiment of the present invention.
[Explanation of symbols]
1 No-step car (vehicle)
3 Roof 4 CNG cylinder 5 Roof panel 5a Notch hole (through hole)
DESCRIPTION OF SYMBOLS 10 Carrier 11 Mounting stand 16 Bracket 20 Roof rail 21 Roof bow 22 Stiffener 23 Window upper rail 24, 24A-24T Side roof bow 25 Support bracket (vehicle side mounting member)
26 Support surface 27 Reinforcement surface 28, 34 Bolt hole (through hole)
30 Bracket support (carrier side mounting member)
31, 37 Bolt 32, 38 Nut 33 Flange part 35 Spacer 36 Packing (seal member)
39 Sealant

Claims (4)

A carrier mounting structure on the roof of a vehicle,
A roof panel forming the roof;
Mounting holes drilled in the roof panel;
A carrier side mounting member provided on the carrier;
A vehicle-side mounting member disposed inside the roof panel;
A spacer Rutotomoni, formed thicker than the roof panel is sandwiched between the carrier-side mounting member and該車sides mounting member is disposed with hole said mounting,
A carrier mounting structure comprising a seal member disposed so as to surround the mounting hole and sandwiched between the carrier side mounting member and the roof panel. The carrier mounting structure according to claim 1, wherein a through hole is formed in the spacer, and the carrier side mounting member and the vehicle side mounting member are fastened by a bolt passing through the through hole. 2. The carrier mounting structure according to claim 1, wherein the seal member is made of an elastic member having a thickness larger than that of the spacer. The carrier mounting structure according to claim 1, wherein a sealing agent is applied to a gap between the carrier side mounting member and the roof panel at an outer peripheral portion of the seal member.

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