JPH0118759Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tread as a child board forming a constituent unit of a prefabricated road board such as a ladder, staircase, or gangplank.

When workers cross ground piping at a construction site, or cross obstacles such as embankments or breakwaters, do not cross the pipes or obstacles. Because of this, it is necessary to erect sloped road boards or stepped road boards above the ground, and conventionally, road boards were formed by assembling logs and wooden boards, but such Conventional temporary road boards have the disadvantage that they are only strong enough to allow people to pass through them, are not durable, and are only useful for short periods of time, and are time-consuming to assemble and remove.

The present invention was devised to solve these difficulties, and the purpose of the present invention is to provide a structure that is easy to assemble and disassemble, that allows slopes and stairs to be formed freely in the middle, and that To provide a footboard that can constitute a sturdy and durable roadboard that can withstand the transportation of heavy objects and the passage of vehicles.

As a means to achieve this purpose, the tread of the present invention is a tread as a child board forming a constituent unit of a prefabricated road board used as a ladder, staircase, or gangplank, and has side panels on the left and right edges of a rectangular tread body. are fixedly installed, and further protrude from both the front and rear ends of the tread body, the front and rear end portions of each side plate are,
It is characterized by being formed into a leg plate with engagement holes drilled at multiple locations on a semicircular line.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

As shown in FIGS. 1 to 4, the tread plate 1 of the embodiment is formed by a rectangular tread body 2 and side plates 3 and 4 fixed to the left and right side edges of the tread plate body 2. , First, the tread body 2 has ribs 5 and 6 fixedly installed on the lower surface of the bottom surface at multiple locations (two locations in the figure) in the middle in the front-rear direction (horizontal direction in FIG. The side ends of the ribs 5 and 6 are welded to the left and right side plates 3 and 4, respectively. Moreover, this tread body 2 is
It is preferably molded from an aluminum plate or mild steel, and preferred material shapes include expanded metal,
It is in the form of a check card plate or a non-slip board.

Furthermore, a hinge pipe 7 is fixed to most of the front edge of the tread body 2 except for the left and right sides, and
There are short hinge pipes 8 on each side of the rear edge.
is fixedly installed, and the outer end of the hinge pipe 8 is welded to each side plate 3, 4.

Note that cutouts 2a for escaping fixing nuts, which will be described later, are formed by drawing at the front and rear parts of each of the right and left ends of the tread body 2, respectively.

Next, each of the left and right side plates 3 and 4 is connected to each middle ear plate 3.
a, 4a, and each leg plate 3b, 4b near the front end
It is a sheet metal member in which the leg plates 3c and 4c near the rear end are integrated, and the front leg plates 3b and 4b are integrated.
are slightly shifted from the side edge of the tread body 2 and are floating from the same side edge, and each of the side plates 3 and 4 is
The ear plates 3a, 4a are welded to the tread body 2 at an intermediate height.

Each of the front leg plates 3b, 4b has a semi-circular shape and extends downward, and a center hole 9 communicating with the inner hole of the hinge pipe 7 is opened at the center of the leg plate 3b, 4b. Engagement holes 10 are formed at seven locations on the circumferential line at 30° arc intervals.

In addition, each rear leg plate 3c, 4c has a symmetrical outer shape with the front, and has a core hole 11 communicating with the inner hole of the hinge pipe 8 and five engagement holes 12 at 45° arc intervals. In addition, each leg plate 3c, 4
A fixing nut 13 is welded to the back surface of the engagement hole 12 of c.

In addition, a vertical receiving tube 14 is welded to the outer surface near the center of each ear plate 3a, 4a.

The treadle 1 formed in this manner is provided with a hinge shaft 15 shown in FIG. 5, a pair of double nuts and washers 16, and a pair of locking bolts 17. has a threaded portion 15a into which a double nut 16 is screwed.
is formed, so that the hinge shaft 1
The dimensions of the total length W ₂ of 5 and the length W ₁ of the round bar part are:
As shown in FIG. 1, it is formed to have a dimension W ₂ larger than the spacing between both leg plates 3b and 4b, and a dimension W ₁ smaller.

In addition, the footboard 1 is separately provided with a handrail support 18 (see FIGS. 6 and 7) and a pedestal 19 (see FIG. 8), which can be selected and used as necessary. The handrail support post 18 has a receiving tube 1 at its lower part.
The pedestal 19 is formed such that the lower end thereof is installed on the ground, and the receiver tube 14 is dropped into the top of the pedestal 19. and its height can be adjusted with a screw.

Next, regarding the connection mode of the treadle 1 of the embodiment configured as described above, FIGS. 9 to 11a to 1
This will be described with reference to Figure 1e.

(a) In the case of straight connection (Figures 9 and 10) First, connect the hinge pipe 8 of the treadle 1 on the left side of the drawing,
After communicating with the hinge pipe 7 of the footboard 1 on the right side of the drawing, the hinge shaft 15 is inserted into the communication inner hole, and the screw portions 1 at both ends of the hinge shaft 15 are connected to each other.
Loosely temporarily fasten 5a with a double nut and washer 16.

Next, if both tread plates 1 are placed in a straight line, the lower engagement holes 12 of the leg plates 3c, 4c of the left tread plate 1 will match the lower engagement holes 10 of the leg plates 3b, 4b of the right tread plate 1. , Insert the locking bolt 1 into the matching engagement hole.
7 and then screw it onto the fixing nut 13.

Thereafter, the double nut and washer 16 are tightened to fix the hinge shaft 15.

As a result, both footboards 1 are firmly connected in a straight line with a two-point connection.

(b) 15° downward slope connection (see Figure 11a) After temporarily fixing the hinge shaft 15, if the right treadle 1 is maintained at a 15° downward slope, the lower left engagement hole of the left side treadle 1 will open. 12 and the third engagement hole 10 from the left of the right footboard 1, screw the locking bolt 17 into the engagement hole, and then tighten the hinge shaft 1.
Tighten step 5.

(c) 30° downward slope connection (see Figure 11b) Similarly, insert the locking bolt 1 into the hole where the lower engagement hole 12 and the third engagement hole 10 from the right coincide.
Screw 7.

(d) Connection in any direction by selectively matching the engagement holes In this way, by selectively matching the engagement holes 10 and 12, connections can be made in any upward or downward slope at a pitch of 15°. For example, an upward slope of 30° as shown in Figure 11c,
Connection can be made in any direction depending on the site, such as a 90° downward slope as shown in Figure 11d or a 90° upward slope as shown in Figure 11e.

Next, FIG. 12 shows an example of a road board assembled using the tread board 1 of the embodiment. It is constructed by connecting 17 treads 1, starting from the land side: 1 uphill tread, 1 uphill tread,
It forms a passage with 3 ascending stairs, 3 horizontal steps at the top, and 4 descending steps, and the two treads 1 on the land side, the middle tread 1 at the top, and the last tread 1 on the coast,
The tread plate 1 of the second ascending step and the tread plate 1 of the second descending step are supported directly on the ground by the leg plates, respectively.
Each of them is supported on the ground via a pedestal 19.

In addition, handrail supports 18 are erected on the footboards 1 at four locations, and handrail cables 20 are stretched between each support post 18, thereby ensuring safety.

Furthermore, another example of the use of the road board is shown in FIG. In this example, a tread 1 on the sea side is connected and protruded into the sea, and a float 30 is fixed to the tip to form a floating bridge. By using such a road board, it is possible to easily engage the oil fence 31 and suction mats on the water surface away from the breakwater A, and their installation and removal are also easy.

As described above, since the road board formed by the tread board 1 of the embodiment is assembled by bolting iron materials, the structure is extremely strong, and the road board can be widened and formed into a straight or sloped road. It is safe enough for transporting heavy objects and passing vehicles, and since there is no loosening or damage over time, it can be used semi-permanently.Furthermore, it is easy to disassemble and assemble, so it can be used for remodeling. is free and easy to relocate.

In the configuration of the footboard 1 of the embodiment described above, the shapes of the front leg plates 3b, 4b and the rear leg plates 3c, 4c of the left and right side plates 3, 4 are bilaterally symmetrical, but instead of this, as shown in FIG. Even if the shapes of the front leg plates 21a, 22a and the rear leg plates 12b, 22b of the left and right side plates 21, 22 are formed to be staggered from front to back, the same connection effect can be obtained.

In addition, a locking bolt 17 and a fixing nut 13 are used as a locking device for the engaging hole 10 and the engaging hole 12 of the leg plate that overlap each other, but instead of this, in the case of a short-term use foot plate, Plug-in metal fittings such as clips and hooks may be used as the fasteners.

As described above, according to the treadboard according to the present invention, each side plate is fixed to the left and right side edges of the rectangular tread body, and the front end and rear end of the same side board are respectively connected to the adjacent treadboard. The tread plate was formed by forming a leg plate that overlaps with the leg plate and locks the selected parts with each other.
A road board formed by connecting multiple treads can be freely and easily assembled into gangplanks of bridges, slopes, stairs, etc., and can also be made to be sturdy and durable. This has the effect of making it possible to construct road boards with excellent practicality.

[Brief explanation of the drawing]

1 is a plan view of a treadle showing an embodiment of the present invention, FIG. 2 is a side view of the same, and FIGS. 3 and 4 are a rear view and a rear view taken along the arrow and - line in FIG. A sectional view, FIG. 5 is a view of the hinge shaft and locking bolt as accessories, FIG. 6 is an elevation view of the handrail support column, and FIG. 7 is a plan view of the same.
FIG. 8 is an elevational view of the pedestal, FIG. 9 is a plan view of the connected tread, FIG. 10 is a side view of the same, and FIGS. 11a to 11e are those of FIG. Action diagram, 1st
2 and 13 are perspective views of a road board formed by multiple tread boards, and FIG. 14 is a plan view of the tread board showing another embodiment. 1...Treadboard, 2...Treadboard body, 3, 4, 21, 2
2...Side plate, 3b, 4b, 3c, 4c, 21a,
22a, 21b, 22b... leg plate, 7, 8... hinge pipe, 10, 12... engagement hole, 15... hinge shaft, 17... locking bolt as a locking tool.

Claims (1)

[Scope of utility model registration request] Side plates are fixed to the left and right edges of a rectangular tread body, and the front end portion and rear end portion of each side plate protruding from both front and rear ends of the tread body are located at multiple points on a semicircular line. A footboard characterized in that the footboard is formed into a leg plate with an engaging hole bored in the bottom.