JPH11208835A - Crawler roller and transferring method by crawler roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler roller and a transferring method by the crawler roller, capable of very easily transferring a very heavy PC member such as a box culvert to its destination. SOLUTION: A plurality of expandable and contractible columnar rollers are laterally arranged, mutually adjacent columnar rollers are rotatably connected by a connecting plate into a band shape, and the columnar roller on the tip and columnar roller on the terminal are rotatably connected to and disconnected from each other by a connecting fitting 3. Crawler rollers 9 are wrapped on the bottom part of a box culvert B to be transferred, and the columnar roller on the tip and the columnar roller on the terminal are connected to each other. The box culvert is rolled on a leveling concrete 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caterpillar roller used for transferring an extremely heavy PC member such as a box culvert and a transfer method using the caterpillar roller.

[0002]

2. Description of the Related Art Heretofore, when laying an extremely heavy PC member such as a box culvert, the PC member is transported to a laying position by placing it on a cart or the like.

FIG. 9 shows a conventional example of a box culvert transfer method. First, in order to lay a box culvert 30, a concrete 31 is poured into a predetermined thickness at a root bottom which is dug down to a predetermined depth. This discarded concrete
Two truck rails 32 are laid on 31.

[0004] A cart is placed on the left and right cart rails 32.
33 are installed respectively. And box culvert 30
Are mounted on the left and right trolleys 33, and are later moved on the trolley rails 32 by being pushed by a human hand and transferred to the laying position.

[0005]

However, the transport by the cart 33 requires a lot of trouble in loading and unloading the box culvert 30. In particular, when the box culvert 30 is transported to the laying position and the box culvert 30 is lowered from the trolley 33, the box culvert 30 is moved by the jack 34 to the trolley 33.
Floating from the box trolley 33 from below the box culvert 30
It is necessary to operate the jack 34 to discard the box culvert 30 and slowly drop the box culvert 30 on the concrete 31.

Also, if the running surface of the bogie rail 32 is uneven or gravels are scattered, the bogie 33 cannot run smoothly on the bogie rail 32, which hinders the transfer of the box culvert 30. There were also issues such as coming up.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a caterpillar roller and a transfer method using the caterpillar roller which can transfer a very heavy PC member such as a box culvert to a destination very easily. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a caterpillar roller in which a plurality of expandable and contractible columnar rollers are arranged side by side and adjacent columnar rollers. They are rotatably connected to each other and connected in a strip shape, and the columnar roller at the leading end and the columnar roller at the end can be rotatably connected and disconnected.

According to a second aspect of the present invention, in the caterpillar roller, the columnar roller is expanded by installing a core pipe in the center of a cylindrical air tube and sealing the air in the air tube. It is configured to contract by extracting air from the air tube.

According to a third aspect of the present invention, the caterpillar roller is wound around a member to be transferred, and the columnar roller at the front end and the columnar roller at the end are connected. Then, the member is transferred by rolling the running surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the Invention 1 to 6
1 shows an embodiment of the present invention, in which a plurality of columnar rollers 1 are arranged side by side at predetermined intervals. Further, the plurality of columnar rollers 1 are rotatably connected to each other by a connecting plate 2 at both ends, and are connected in a belt shape (see FIGS. 1 (a) and 1 (b)).

Further, both ends of the columnar roller 1 at the front end and both ends of the columnar roller 1 at the end can be connected rotatably by connecting metal fittings 3 to form an endless shape, and a plurality of endless shapes can be formed. A member A such as a PC member transferred to the inside of the columnar roller 1 is put in, and the member A can be transferred by rolling the running surface by manually pushing the member A later (see FIG. 1 (c)).

The connecting portion between both ends of the columnar roller 1 at the front end and both ends of the columnar roller 1 at the end is configured to be easily separated later.

The columnar roller 1 is formed by installing a core pipe 5 such as a steel pipe at the center of a cylindrical air tube 4 made of a rubber sheet or a synthetic resin sheet.

The air tube 4 and the core pipe 5 communicate with each other through a plurality of air holes 6 formed on the side surface of the core pipe 5 (see FIGS. 4A and 4B). Further, an air hose 7 is connected to an end of the core pipe 5 of each columnar roller 1, and the respective core pipes 5 communicate with each other by the air hose 7 (see FIGS. 5A and 5B).

Then, from the air hose 7, each of the columnar rollers 1
The air tube 4 of each columnar roller can be expanded by filling air into the air tube 4 of each columnar roller, and the air tube 4 of each columnar roller 1 can be contracted by extracting air from the air tube 4. it can.

The connecting plate 2 is rotatably connected to the end of the core pipe 5 via a bearing (bearing) 8.

The connecting bracket 3 is a columnar roller 1 connected in a strip shape.
Of both ends of the columnar roller 1 at the tip and the columnar roller 1 at the end
Connecting plates 2a and 2b projecting from both ends of the
Are configured to be easily connected and disconnected.

FIGS. 6 (a) and 6 (b) show an example of the connection fitting 3.
Two or more connecting bolts 3a penetrating through connecting holes 2c formed at the ends of connecting plates 2a and 2b, respectively.
And connecting plates 3b attached to the side portions of connecting plates 2a and 2b by passing through connecting bolts 3a.
And a stopper 3c for preventing the connection bolt 3a from coming out of the connection hole 2c. The caterpillar roller 9 is configured as described above.

Next, a method of transferring the box culvert B by the caterpillar roller 9 will be described step by step (FIG. 7).
(a) to (c), and FIGS. 8 (a) to (c).

First, a concrete disc 10 is poured into a predetermined thickness on a root bottom dug down to a predetermined depth, and a groove-shaped rail 11 for setting a caterpillar roller 9 on the discard concrete 10. Is formed along the longitudinal direction of the root bottom.

At this time, the groove rail 11 is formed to be slightly shallower than the outer diameter of the columnar roller 1 when the air tube 4 expands, so that a part of the air tube 4 is formed.
To protrude from

When the box culvert B is extremely large and heavy, a plurality of rows of grooved rails 11 are formed so as to be transported by three or four caterpillar rollers 9.

On the other hand, when the box culvert B is extremely small and light and can be transported by one caterpillar roller, the groove-shaped rail 11 is formed as a single line at the center of the root bottom.

Next, the caterpillar rollers 9 are extended and set in a strip shape on the left and right grooved rails 11, respectively, and the box culvert B is set thereon (see FIG. 7 (b)).

Next, air is sealed from the air hose 7 into the air tubes 4 of the respective columnar rollers 1 to inflate the air tubes 4 of the respective columnar rollers 1 into a column shape.

When the air tube 4 is inflated, the box culvert B is pushed up by the plurality of columnar rollers 1 and floats on the discarded concrete 10 and is placed on the columnar rollers 1.

Next, the caterpillar roller 9 is wound around the bottom plate portion of the box culvert B one round, and connection plates 2a and 2b projecting from both ends of the columnar roller 1 at the front end and both ends of the columnar roller 1 at the end are respectively attached. The plurality of columnar rollers 1 are connected endlessly by connecting with the connecting metal fittings 3 (see 7 (c)).

Next, the box culvert B is pushed from behind to roll in the grooved rail 11 and is transported to the laying position. Then, the columnar roller 1 at the front end and the columnar roller 1 at the end are cut off, and the air in the air tube 4 of each columnar roller 1 is evacuated to contract the air tube 4.

By doing so, the air tube 4 contracts, and the box culvert B descends to the waste concrete 10 and is placed on the waste concrete 10.

For this reason, when loading and unloading the box culvert B, there is no need to intentionally jack up the box culvert B.

Next, the box culvert B is set at a predetermined position. Further, the caterpillar roller 9 is pulled out from the groove rail 11 (see FIG. 8C).

FIG. 3 shows that the grooved rails 11 are not formed on the discarded concrete 10, and H
A base 12 made of shaped steel or the like is continuously laid in the longitudinal direction of the root bottom, and a box culvert B is placed on the base 12.
Is laid.

At this time, the gap between the discarded concrete 10 and the box culvert B may be filled with concrete later.

[0035]

The transfer method using the caterpillar roller according to the present invention has the above-described structure. After the caterpillar roller is wrapped around the member to be transferred one round, and the columnar roller at the front end and the columnar roller at the end are connected. Since the member is transported by rolling the running surface, an extremely heavy PC member such as a box culvert can be transported to the destination very easily.

The columnar roller expands by installing a core pipe in the center of a cylindrical air tube and enclosing the air tube with air, and contracts by extracting air from the air tube. With such a configuration, loading and unloading of extremely heavy PC members such as box culverts can be performed very easily without particularly jacking up.

Further, even if pebbles and the like are scattered on the running surface, the air tube is recessed to avoid the projections on the running surface, so that there is an effect that a heavy PC member can be easily transferred to the destination.

[Brief description of the drawings]

1A is a side view of a caterpillar roller extending in a band shape, FIG. 1B is a plan view thereof, and FIG. 1C is a side view of a caterpillar roller connected endlessly.

FIG. 2 is a longitudinal sectional view showing a method of transporting a box culvert by a caterpillar roller.

FIG. 3 is a partial longitudinal sectional view showing a method of transporting a box culvert by a caterpillar roller.

4A is a longitudinal sectional view of a columnar roller, and FIG. 4B is a sectional view taken along line II in FIG. 4A.

5A is a partial side view of the caterpillar roller, and FIG. 5B is a partial plan view thereof.

FIG. 6A is a partial side view of a connecting portion, and FIG. 6B is a partially broken plan view thereof.

FIGS. 7A, 7B, and 7C are side views showing a method of transporting a box culvert by a caterpillar roller.

FIGS. 8A, 8B and 8C are side views showing a method of transferring a box culvert by a caterpillar roller.

FIG. 9 is a cross-sectional view showing a conventional box culvert transfer method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Columnar roller 2 Connection plate 2a Connection plate 2b Connection plate 2c Connection hole 3a Connection bolt 3b Attached plate 3c Stopper 4 Air tube 5 Core pipe 6 Air hole 7 Air hose 8 Bearing (Bearing) 9 Caterpillar roller 10 Discarded concrete 11 Groove Rail 12 rails

Claims (3)

[Claims] A plurality of inflatable and contractible columnar rollers are arranged side by side, and adjacent columnar rollers are rotatably connected to each other to form a belt-like shape, and a columnar roller at a leading end and a columnar roller at a terminal end are connected. A caterpillar roller rotatably connected and disconnected. 2. The columnar roller expands by installing a core pipe at the center of a cylindrical air tube and enclosing the air tube with air, and contracts by extracting air from the air tube. The caterpillar roller according to claim 1, wherein the roller is configured as follows. 3. The member to be transferred is wound with the caterpillar roller according to claim 1 or 2, and a columnar roller at the leading end and a columnar roller at the end are connected, and then the running surface is rolled to transfer the member. A transfer method using a caterpillar roller.