JP2827908B2 - Aluminum bridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum street bridge constructed from the side of a road to the side of a sidewalk.

[0002]

2. Description of the Related Art When a car is to be garaged across a sidewalk, it is necessary to get on the sidewalk which is one step higher than the side of the road. Conversely, when the vehicle is taken out of the garage, an impact may be applied due to a step between the sidewalk surface and the road surface. Therefore, in order to smoothly and easily perform operations such as putting in and out of a garage, a street culvert is usually laid from a roadway to a sidewalk. In addition, a culvert may be laid when the sidewalk is under construction or in order to get over a gutter. As a bridge for street culverts, concrete, steel plate, thick plywood, and the like have been conventionally used.

[0003]

The concrete street culvert has a drawback that it is heavy and is liable to be damaged or cracked by an impact. Steel culverts are also heavy. Although the veneer made of plywood is relatively lightweight, it is easily broken when a heavy load such as an automobile is applied. In addition, the culvert used at the construction site is often unnecessary after the completion of the construction. In this regard, it is desirable to have a sewer that is easy to remove and carry out.
The present invention has been devised in order to solve such a problem, and is made of aluminum in consideration of weight reduction.Each unit is unitized, and one-touch connection of each unit allows the unit to be easily connected to a required width. The purpose is to provide a culvert that can be laid.

[0004]

SUMMARY OF THE INVENTION In order to achieve the object, an aluminum street culvert bridge according to the present invention has a pair of left and right frames in which both ends of a channel material obtained by extrusion molding of aluminum are cut off and crushed. And a plurality of steps, which are passed over the frame and both ends of which are fixed, a bush incorporated at both ends of each frame, and a plurality of bridges arranged in parallel. Is provided, and includes a lock arm urged inward by a spring force of a spring and a tongue hook fixed to one end in the longitudinal direction of the frame, and the lock arm is rotatable in a pulled-out state. Wherein the short leg is inserted into the through hole of the adjacent bush. As a step, a step having a flat surface portion disposed at the center with respect to the longitudinal direction of the frame,
It is used in combination with steps having curved surface portions disposed at both ends. In each step, a ridge effective as a non-slip is formed in the width direction. These steps consist of extruded sections of aluminum and have flanges formed at the ends of the upright walls rising from flat or curved surfaces.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment is an example in which the present invention is applied to a street culvert laid at a place where a road 2 is lower than a sidewalk 1, as shown in a perspective view as a whole in FIG. There is a gutter 3 at the boundary between the sidewalk 1 and the road 2, and a street 4 is arranged across the gutter 3. The street culvert 4 has a structure in which a plurality of bridges 5, 5,... Are detachably connected. Each of the bridges 5, 5... Has the step 20 passed over the frame 10 and has a tongue hook 30 fixed at one end. The tongue hook 30 is made of extruded aluminum material and has a frame 1
0 are spot welded 31 and 32 (see FIG. 4).
As shown in FIG.
When the bridges 5, 5,... Are crossed over the sidewalk 1, the posture of the arranged bridges 5, 5,.

The frame 10 is made from an extruded aluminum profile. In this embodiment, as shown in FIG. 2A, a channel member 12 having a sectional shape having one open side and a step portion 11 provided on the opposite side was used. Since the upper surfaces of both ends of the frame 10 are inclined surfaces, both ends of the frame 10 are shown in FIG.
Is cut out, and crushed while a bush 41 of a connection mechanism 40 described later is inserted. As a result, as shown in FIG.
14 is the frame 10 formed. The notch joint 15 was welded to prevent the notch opening from opening. The frames 10 and 10 are arranged in parallel in the width direction as shown in FIG.
Hand over.

As shown in FIG. 3 (a), the step 21 disposed at the center in the longitudinal direction of the frames 10, 10 is made of an extruded aluminum material having a substantially E-shaped cross section. Flanges 23, 23, 23 are formed at each end of the vertical walls 22, 22, 22 forming the E-shaped cross section, and together with the E-shaped cross section, the rigid strength of the step 21 is effectively increased. On the upper surface of the step 21, two raised portions 24, 24 serving as anti-skids are provided in the width direction of the step 21. As shown in FIG. 3B, the end of the step 21 is placed on the step 11 of the frame 10 and spot welded 25 to the vertical wall of the frame 10. The other end of the frame 10 is also spot-welded to the other frame 10. As a result, as shown in FIG.
Steps 21, 21... Are passed between 0 and 10.

The step 26 disposed at the longitudinal end of the frames 10, 10 has a cross-sectional shape shown in FIG. 3 (c), and the curved surface portion 27 has a curved surface 27 as shown in FIG. 2 (b). 10 and 10 correspond to the inclined surfaces 13 and 14.
Step 26 also includes standing walls 22,22 and flanges 23,23.
The rigidity is increased by the
Are fixed at both ends. The curved surface portion 27 prevents the wheels from being caught when the vehicle is running. Each bridge 5,5
A connection mechanism 40 is provided on the end face of one of the frames 10 serving as the skeleton. The connection mechanism 40 includes a lock arm 42 inserted through the bush 41 as shown in FIG.
It has. A bush 41 having no lock arm 42 is incorporated into an end surface of the other frame 10. That is, as shown in FIG.
When the.. Are arranged in parallel, the bush 41 provided with the lock arm 42 and the bush 41 not provided with the lock arm 42 are adjacent to each other.

As shown in FIG. 4B, the bush 41 is made of an extruded aluminum material having a substantially rectangular cross section, and a step 43 is formed on a part of the side surface. At the center of the bush 41, a through hole 44 through which the lock arm 42 is inserted is formed along the longitudinal direction. The lock arm 42 is made of a material having excellent corrosion resistance, such as stainless steel, and as shown in FIG. 4C, the short leg 47 extends from the long leg 45 through a handshake 46 bent at a right angle. Has a substantially L-shaped main body. On the long side leg 45,
A spring 49 locked by a spring stopper 48 is interposed. The long leg 45 is inserted into the through hole 44 of the bush 41, and a spring 49 is fitted to the protruding portion of the long leg 45 protruding from the opposite side of the through hole 44, and is locked by a spring stopper 48. As a result, the spring 49 has the spring stopper 48 and the bush 4 at both ends.
The lock arm 42 is urged in the direction of being pushed into the through hole 44 of the bush 41 by being regulated by the end face of the bush 41.

A bush 41 on which a lock arm 42 is mounted
Is cut into the side wall at the end of the channel material 12 and crushed, and then inserted into the channel material 12. Therefore, in a state where the end of the channel material 12 is crushed,
As shown in FIG. 4D, the lower surface of the upper side wall of the channel material 12 abuts on the step 43. Note that the bush 41 is welded to the channel material 12 at a plurality of welding points in order to fix the bush 41 to the end of the frame 10 formed by the channel material 12. FIG. 4A shows an end cross section on the side to which the tongue hook 30 is fixed. The locking mechanism 40 incorporated at the inner end of the frame 10 exposes the handgrip 46 of the lock arm 42 at the end of the frame 10.

When laying down a street culvert, a required number of bridges 5, 5,... Are prepared. Then, the handgrip 46 located on the end face of the frame 10 is grasped, and the lock arm 42 is pulled out against the elasticity of the spring 49. The pulled-out lock arm 42 is rotated to position the short leg 47 in the through hole of the bush 52 incorporated in the adjacent frame 51. When the handshake portion 46 is released in this state, the lock arm 42 is retracted by the elastic resilience of the spring 49, and FIG.
As shown in (1), the short leg portion 47 is inserted into a through hole of the bush 52 incorporated in the adjacent frame 51. Thereby, the adjacent frame 51 is connected to the frame 10.

The other end of the adjacent frame 51 is also connected to the frame 10 by a similar locking mechanism 40. as a result,
A plurality of frames are connected to each other, and as shown in FIG. 1, a street 4 in which a number of bridges 5, 5,... Are integrated is completed. In this way, a plurality of bridges are interconnected by a very simple one-touch procedure, and a culvert having the required width is easily laid. Since the laid bridges are integrated with each other, they do not shift due to being dragged by a heavy object such as a vehicle or the like, and are sufficiently formed due to the cross-sectional structure shown in FIGS. 3 (a) and 3 (c). High strength. In addition, since only the handshake portion 46 is exposed at the end face of the connection mechanism 40, the connection portion is not easily visually recognized, and effectively works to prevent theft. Frame 10, aluminum extruded material to be used in step 20 or the like, 6061-T ₆ material are common. However, the present invention is not limited to this, and other extruded materials can be used. Also, the surface treatment is carried out by alumite, painting and the like as needed.

[0013]

As described above, the bridge for street culverts of the present invention uses extruded aluminum members for the frame and the step, which are the main members, in consideration of weight reduction, and each bridge is formed by one-touch operation. A connection mechanism is incorporated in the frame so that it can be connected. The street bridge integrated by the connection mechanism does not shift due to being dragged by a heavy object such as a vehicle, has sufficient strength, and has a grip portion that is difficult to visually recognize, so that it is subjected to malicious decomposition or theft. Less danger.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a state in which a bridge for street drains of the present invention is laid.

FIG. 2 shows a frame end (a) before formation, a frame (b) after formation of the end, and a step (c) spanning the left and right frames.

FIG. 3 shows a step (a) having a flat surface portion, a connection portion (b) between the frame and the step, and a step (c) having a curved surface portion.

FIG. 4 shows an end (a) of a frame in which a connection mechanism is mounted, a bush (b) of the connection mechanism, a lock arm (c) of the connection mechanism, and a lock arm (d) bridged over an adjacent bush.

[Explanation of symbols]

4: Street culvert 5: Bridge 10: Frame 1
1: Step 12: Channel material 13: Slope
20: Step 21: Step in the center 22:
Standing wall 23: Flange 24: Raised portion 26: End step 27: Curved surface portion 30: Velo hook 40: Connection mechanism 41: Bush 42: Lock arm 43: Step 44: Through hole
45: long leg 46: handshake 47: short leg 48: spring stopper 49: spring 51: adjacent frame 52: adjacent bush

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E01C 9/08

Claims (3)

(57) [Claims] 1. A pair of left and right frames, each of which is cut and crushed at both ends of a channel material obtained by extrusion molding of aluminum, a plurality of steps inserted over the frames and both ends of which are fixed, With the bush incorporated at both ends and a plurality of bridges arranged in parallel, the long side leg is inserted into one bush, and the lock arm which is urged inward by the elastic force of the spring and the frame A velo hook fixed to one end in the longitudinal direction, wherein the lock arm is rotatable in a pulled-out state, and a short-side leg is inserted into a through hole of an adjacent bush. . 2. The method according to claim 1, wherein the step includes a step having a flat surface portion disposed at a central portion in a longitudinal direction of the frame, and a step having curved surface portions disposed at both ends. 2. The aluminum culvert bridge according to claim 1, wherein a raised portion extending in the width direction is formed in the bridge. 3. The step according to claim 1, wherein the step is made of an extruded aluminum material and has a flange formed at an end of an upright wall rising from a flat surface or a curved surface. .