JP2021169294A - Conveyance device and conveyance method - Google Patents

Abstract

To provide a conveyance device that enables easy, safe conveyance of a U-shaped groove.SOLUTION: A conveyance device 1 according to the present invention includes: a traveling wheel 4 that freely travels on a bottom surface of an installed U-shaped groove 2; a guide roller 5 that can be brought into contact with a side wall of the installed U-shaped groove 2; and a load-carrying platform 6 on which a to-be-installed U-shaped groove 2' can be loaded. U-shaped grooves 2' conveyed by the conveyance device 1 are sequentially installed, and a to-be-installed U-shaped groove 2' is conveyed using, as a traveling path, the installed U-shaped grooves 2' for extension. Since the traveling wheels 4 travel on the bottom surfaces of the U-shaped grooves 2 that are very smooth as compared with natural ground, the U-shaped grooves can be easily and safely conveyed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transport device and a transport method in which an installed U-shaped groove is used as a transport path and an uninstalled U-shaped groove can be mounted and transported.

Generally, on a cut slope, a small step composed of a horizontal portion having a width of 1 to 2 m is provided every 5 to 10 m in height. This small step reduces the flow velocity of the surface water at the lower part of the slope where the flow rate and flow velocity of the surface water increase and the erosion force increases, and by providing a small step drainage groove in this small step, the surface water concentrates on the lower part of the slope. It is provided mainly for the purpose of preventing erosion of the slope and suppressing surface collapse.

The above-mentioned small-stage drainage ditch is composed of a U-shaped groove made of a concrete precast member, and the U-shaped groove has a standardized specified size. For example, a 300-inch U-shaped groove having a length of 600 mm has a weight of more than 70 kg, so that it is extremely difficult to transport the U-shaped groove. In particular, on long cut slopes, the length of the small drainage ditch often exceeds 1000 m, and it is often forced to transport under local conditions where a large lifting machine cannot be placed according to the lifting distance. ..

Generally, the U-shaped groove is transported to a predetermined storage location near the construction site by a large truck, a crane, or the like, and then transported to each construction site by a small manual transportation or a small transportation device.

In order to facilitate the transportation of a relatively heavy U-shaped groove, various hanging tools and carriers have been developed, for example, as shown in Patent Documents 1 to 4 below.

Specifically, in Patent Document 1 below, the U-shaped groove is hooked on one side portion and one side wall is tightened and sandwiched to be fixed to one side portion of the U-shaped groove so that the U-shaped groove can be lifted and transported reliably and safely. The following Patent Document 2 discloses a hanging tool, which has a storage portion for accommodating a plurality of U-shaped grooves, and a side groove on which the U-shaped groove stored in the storage portion is placed on a laying object. A carrier having a mounting mechanism is disclosed, and in Patent Document 3 below, a pair of tension arms are provided at the lower end of a main pillar, and the tension arms are inserted inside a U-shaped groove to form a grip ring at the upper end. A hanger that can be lifted by holding is disclosed, and Patent Document 4 below discloses a central member placed in the U-shaped groove in the upper part between the inner wall surfaces of the U-shaped groove, and both sides of the central member. Each of the pair of lever members is provided with a pair of lever members rotatably attached to the shaft, and each of the pair of lever members has the shaft as a fulcrum, a first arm portion connecting the fulcrum and the force point, and the fulcrum and the action. A hanger is disclosed which has a second arm portion connecting points and lifts a U-shaped groove by holding the first arm portion so that a lifting force as an external force acts on a force point.

Japanese Unexamined Patent Publication No. 7-172756 Japanese Unexamined Patent Publication No. 6-81388 Japanese Unexamined Patent Publication No. 6-72515 Japanese Unexamined Patent Publication No. 2016-84218

However, the hanger described in Patent Document 1 requires a lifting machine that is hooked on the hanger installed in the U-shaped groove to lift the hanger, but a large hanger is used because the small steps on the cut slope are narrow. There are many cases where it cannot be installed. Similarly, the carrier described in Patent Document 2 is also unsuitable for a narrow construction site such as a small step on a cut slope.

On the other hand, the hanging tools described in Patent Documents 3 and 4 are intended for small transportation in which a U-shaped groove to which the hanging tools are attached is manually lifted and transported. There is a problem. That is, (1) small transportation of a relatively heavy U-shaped groove is a heavy labor, and (2) it is conceivable to use a shortened U-shaped groove in order to keep the weight small enough to be transported. In some cases, the construction work of the joints will increase, and if there is no standard product, the production cost will increase. (3) Since the small steps are narrow, slipping from the small steps is likely to occur and it is safe. I have a sexual problem. There is also a method of loading a U-shaped groove on a wheelbarrow or hand pallet and transporting it, but there is a drawback that it is difficult for the wheelbarrow or hand pallet to run because the surface of the small step remains the ground and the base surface is bad. was there.

Therefore, a main object of the present invention is to provide a transport device and a transport method that enable easy and safe transport of a U-shaped groove.

In order to solve the above problems, the present invention according to claim 1 is characterized in that it includes a traveling wheel that allows the bottom surface of the installed U-shaped groove to travel freely, and a loading platform on which an uninstalled U-shaped groove can be mounted. A carrier is provided.

The invention according to claim 1 is a transport device in which an installed U-shaped groove is used as a transport path, and an uninstalled U-shaped groove can be mounted and transported. The transport device includes traveling wheels that allow the bottom surface of the installed U-shaped groove to travel freely, and a loading platform on which an uninstalled U-shaped groove can be mounted. As described above, in the transport device according to the present invention, since the traveling wheels travel on the bottom surface of the U-shaped groove which is much smoother than the ground, the U The character groove can be easily and safely transported.

As the present invention according to claim 2, the transport device according to claim 1 is provided, which is provided with a guide roller capable of contacting a side wall of an installed U-shaped groove.

According to the second aspect of the present invention, during traveling, the guide roller abuts on the side wall of the U-shaped groove to guide the traveling of the transport device, so that stable and smooth transport is possible.

As the present invention according to claim 3, the transport device according to any one of claims 1 and 2 is provided, which is provided with a stopper capable of holding the transport device in a stopped state.

In the invention according to claim 3, since the stopper that can hold the transport device in the stopped state is provided, when the U-shaped groove is mounted on the loading platform of the transport device, and when the U-shaped groove is mounted, the construction site. When lowering the U-shaped groove from the transport device that has moved to, the transport device can be stopped in place, and safety can be improved.

As the present invention according to claim 4, the transport device according to any one of claims 1 to 3 to which the traveling wheel is attached via a shock absorber is provided.

In the invention according to claim 4, by adding a cushioning function to the traveling wheel, smoother transportation becomes possible.

As the present invention according to claim 5, U-shaped grooves transported by the transport device according to any one of claims 1 to 4 are sequentially installed, and the installed extended U-shaped groove is used as a traveling path for a non-installed U. A transport method comprising transporting a character groove is provided.

In the invention according to claim 5, the U-shaped grooves transported by the transporting device are sequentially installed, and the uninstalled U-shaped grooves are transported using the installed extended U-shaped grooves as a traveling path. It is possible to travel on the bottom surface of the U-shaped groove, which is much smoother than the surface of a mountain, and the U-shaped groove can be easily and safely transported.

As the present invention according to claim 6, the transport method according to claim 5, wherein the transport device travels in a U-shaped groove by pulling or suspending the transport device with a winch is provided.

In the invention according to claim 6, in addition to the traveling of the transport device by human power, the traveling device can be traveled by towing or suspending with a winch. As a result, in places where there is a slope in the extension direction of the U-shaped groove, the U-shaped groove can be transported more easily and safely by pulling or suspending the transport device with a winch through the U-shaped groove. Become.

As described in detail above, according to the present invention, the U-shaped groove can be easily and safely transported.

It is a front view of the transport device 1 which concerns on this invention. It is a side view of the transport device 1. It is a top view of the transport device 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The transport device 1 according to the present invention can be transported to a construction site by mounting an uninstalled U-shaped groove 2'with the inside of the installed U-shaped groove 2 as a transport path and traveling in the U-shaped groove 2. It is a dolly that has been constructed. As shown in FIGS. 1 to 3, the transport device 1 is provided on a gantry 3 and traveling wheels 4, 4 ... , And guide rollers 5, 5 ... Provided on both sides of the gantry 3 so as to be inscribed on the side wall of the U-shaped groove 2 already installed, and guide rollers 5, 5 ... Provided on the upper part of the gantry 3 and not installed. It is equipped with a loading platform 6 on which a U-shaped groove 2'can be mounted.

As described above, since the transport device 1 is equipped with the uninstalled U-shaped groove 2'and can travel in the U-shaped groove 2 and be transported to the construction site, the U-shaped groove 2'can be easily and safely transported. Will be. Further, the traveling surface of the transport device 1 is the bottom surface of the installed U-shaped groove 2, which is a very smooth flat surface as compared with the surface of the ground, so that the U-shaped groove 2'can be transported. It will be easy and safe to do. Further, during traveling, a plurality of guide rollers 5 ... Provided on both sides of the gantry 3 come into contact with the side walls of the U-shaped groove 2 to guide the traveling of the transport device 1, so that stable and smooth transport is possible. become. In particular, as shown in FIG. 1, the bottom surface of the U-shaped groove 2 is provided with R portions 2a having curved shapes at the corners of both side walls in a cross-sectional view, so that the wheels 4 are grooved during traveling. Even if it leans to one side of the bottom surface and rides on the R portion 2a, it automatically returns to the center portion side of the bottom surface of the groove due to its own weight, and stable running is possible.

As described above, in the present transport device 1, the traveling wheel 4 can automatically travel on the central portion of the bottom surface of the U-shaped groove 2. Therefore, the role of the guide roller 5 is to improve the straightness of the transport device 1. Rather than securing, the emphasis is on preventing the transport device 1 from tipping over during traveling, and fine adjustment of the gap between the guide roller 5 and the side wall is required to ensure the straightness of the transport device 1. There is no such thing, and stable driving is easy. Further, even if the groove bottom surface, which is the traveling surface of the traveling wheel 4, is formed to be relatively wide and soil or gravel enters the groove, the traveling wheel 4 removes these dirt or gravel from the periphery of the groove bottom surface. Since it runs while running, stable running is possible in this respect as well. On the other hand, when the traveling wheel travels on a surface other than the bottom surface of the groove, for example, the upper surfaces 2b of both side walls, stable traveling cannot be obtained for the following reasons. That is, the width of the road surface on the upper surfaces 2b of both side walls is very narrow, and the wheels are easily derailed due to a slight deviation of the wheels. There is a risk, and there is a drawback that running becomes more unstable after such chips and cracks occur.

In addition, soil and gravel from the surrounding grounds are likely to accumulate on the upper surface 2b of both side walls, and the surrounding ground has a downward slope toward the small drainage ditch, so that the soil and gravel accumulated on the upper surface 2b due to the running of the wheels. Soil and gravel are difficult to move to the surrounding ground, and the deteriorated road surface is likely to continue, making stable driving impossible. Further, when traveling on a surface other than the bottom surface of the groove, the width of the traveling surface on which the traveling wheels can travel is narrow, such as the upper surfaces 2b of both side walls. It is very important to prevent this, but if the gap between the guide roller and the side of the groove is made too small so that the running wheels are not biased, it will be difficult for the transport device to run, but if this gap is too large, it will run. There is a drawback that it takes a lot of time and effort to adjust this gap, such as the wheels being easily removed.

Next, each member constituting the transport device 1 will be described in detail. In the gantry 3, each member made of a shape rope, a steel pipe, a steel plate, or the like is joined by a known joining means such as welding or bolting. It is a thing.

It is desirable to use commercially available casters as the traveling wheels 4 provided under the gantry 3. As shown in FIG. 2, the traveling wheel 4 is rotatably provided on the holder 8 via the axle 7, and the holder 8 is directly attached to the fixture 9 or via a shock absorber 10 described later. The fixture 9 is fixed to the lower part of the gantry 3 by being indirectly attached. It is preferable to provide a plurality of the traveling wheels 4, and in the illustrated example, a total of four traveling wheels 4 are provided, one pair each in the front and the rear in the groove extending direction, separated from each other in the groove width direction.

As shown in FIG. 2, it is preferable that the traveling wheel 4 is provided via the shock absorber 10. As the traveling wheel 4, it is preferable to use commercially available casters having a cushioning function. By adding a buffer function, smoother transportation becomes possible. In the illustrated example, the cushioning device 10 is composed of a spring-type coil spring provided between the holder 8 and the fixture 9, but may be configured by a known cushioning material such as a leaf spring. Further, by fixing one end of the torsion coil spring to the fixture 9 and fixing the other end to the axle 7, the holder itself that holds the axle 7 may have a cushioning function.

The guide rollers 5 provided on both sides of the gantry 3 are paired on the left and right at positions corresponding to the upper positions of the side walls of the U-shaped groove 2 in the height direction in a state where the transport device 1 is installed in the U-shaped groove 2. It is provided and is arranged in a loosely fitted state in which a slight gap is formed between the guide roller 5 and the side wall. It is desirable to use commercially available casters as the guide roller 5. It is preferable to provide a plurality of the guide rollers 5, and in the illustrated example, the guide rollers 5 project toward both sides in the groove width direction, and a pair of guide rollers 5 are provided in front of and behind each in the groove extending direction, for a total of four. In the example shown in FIG. 2, the guide roller 5 is located outside the traveling wheel 4 in the groove extending direction to improve the traveling stability of the transport device 1, but the traveling wheel 4 is located at the lower end portion. By integrally arranging the guide roller 5 at an intermediate position in the height direction of the pedestal leg to be fixed, the traveling wheel 4 and the guide roller 5 are arranged at substantially the same position in the groove extension direction. May be good.

The loading platform 6 is provided at a position above the installed U-shaped groove 2, and is formed in a size such that an uninstalled U-shaped groove 2'can be mounted on the upper surface. As shown in FIG. 3, a towing plate 11 to which a rope or the like for towing or suspending the transport device 1 can be fastened is provided at both ends of the loading platform 6 in the groove extending direction. Further, on both sides of the loading platform 6, loading hooks 12 for preventing the mounted U-shaped groove 2'from falling are provided.

Only one U-shaped groove 2'may be mounted on the loading platform 6 as shown in the illustrated example, or a plurality of U-shaped grooves 2'may be stacked and mounted, although not shown.

Further, a plurality of the transport devices 1 may be connected in the groove extending direction, and in that case, the front and rear transport devices 1 and 1 are fastened to each other with the towing plates 11 and 11 with a rope or the like. Is preferable.

It is preferable that the transport device 1 is provided with a stopper 13 that can hold the transport device 1 in a stopped state. The stopper 13 is provided so as to come into contact with the groove of the installed U-shaped groove 2 and stop the movement of the transport device 1. By providing the stopper 13, when mounting the U-shaped groove 2'and when unloading the U-shaped groove 2'from the transporting device 1 which has been moved to the construction site by mounting the U-shaped groove 2', the transporting device. 1 can be stopped on the spot, and safety can be improved. In the illustrated example, two stoppers 13 are provided at each end in the groove extending direction, but one or three or more stoppers 13 may be provided.

The specific structure of the stopper 13 is such that the outer cylinder 14 fixed to the lower end of the leg portion of the gantry 3 is fitted inside the outer cylinder 14 in a vertically movable state, and the lower end portion is the outer portion. A shaft member 15 provided in a state of protruding from the cylinder 14, a stopper contact plate 16 provided at a protruding lower end portion of the shaft member 15, and an operating lever 17 for moving the shaft member 15 in the vertical direction. It is composed of. When the transport device 1 is driven, the operating lever 17 is operated to raise the shaft member 15 and separate the stopper contact plate 16 from the bottom surface of the groove. On the other hand, in order to hold the transport device 1 in the stopped state, the operating lever 17 is operated to move the shaft member 15 downward, and the stopper contact plate 16 is brought into contact with the bottom surface of the groove to bring the stopper contact plate 16 into contact with the bottom surface of the groove. The transport device 1 can be held in a stopped state by the frictional force between the groove and the bottom surface of the groove.

In the illustrated example, the stopper 13 is brought into contact with the bottom surface of the groove, but it may be brought into contact with both side walls of the groove.

In the transport method using the transport device 1, the U-shaped grooves 2'carried by the transport device 1 are sequentially installed, and the installed extended U-shaped groove 2 is used as a traveling path to transport the uninstalled U-shaped groove 2'. do. The transport device 1 may be manually pushed or towed by human power, but especially in a place having a gradient with respect to the extension direction of the U-shaped groove 2, the transport device 1 is towed or suspended by a winch. It is preferable that the transport device 1 can travel in the U-shaped groove 2. The winch pulls the wire from the lower side to the upper side of the slope by winding the wire with a drum installed on the upper side of the slope. Further, the winch is suspended by pulling out a wire from a drum installed on the upper side of the slope when lowering the transport device 1 from the upper side to the lower side of the slope. The operation of the winch may be either electric or manual.

1 ... Transport device, 2 ... U-shaped groove that has been installed, 2'... U-shaped groove that has not been installed, 3 ... Stand, 4 ... Running wheels, 5 ... Guide rollers, 6 ... Loading platform, 7 ... Axles, 8 ... Holders , 9 ... Fixture, 10 ... Shock absorber, 11 ... Tow plate, 12 ... Loading hook, 13 ... Stopper, 14 ... Outer cylinder, 15 ... Shaft member, 16 ... Stopper contact plate, 17 ... Operating lever

Claims (6)

A transport device characterized by being provided with traveling wheels that allow the vehicle to travel freely on the bottom surface of the installed U-shaped groove and a loading platform on which an uninstalled U-shaped groove can be mounted. The transport device according to claim 1, further comprising a guide roller capable of contacting the side wall of the installed U-shaped groove. The transport device according to any one of claims 1 and 2, further provided with a stopper capable of holding the transport device in a stopped state. The transport device according to any one of claims 1 to 3, wherein the traveling wheels are attached via a shock absorber. The U-shaped groove transported by the transport device according to any one of claims 1 to 4 is sequentially installed, and the uninstalled U-shaped groove is transported using the installed extended U-shaped groove as a traveling path. Transportation method. The transportation method according to claim 5, wherein the transportation device travels in a U-shaped groove by towing or suspending the transportation device with a winch.

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