JP2920031B2 - Elastic pavement construction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is ground for athletics, track, court, jogging track, relates to facilities Engineering machine you elastic paving the floor or the like, elastic pavement in particular made of polyurethane or synthetic resin material such as an acrylic emulsion in a short period of time the wood on high precision construction can Ru machinery.

[0002]

2. Description of the Related Art Conventionally, various polymer pavement materials have been used for elastic pavements such as grounds, tracks, and coats. In particular, when used in outdoor facilities, all-weather types can be used, and the demand has been increasing in recent years.Especially, elastic pavement materials using polyurethane resin are liquid resins of on-site construction type. It is widely used because it can control the hardness and has excellent strength and wear resistance.

[0003] In general, an elastic pavement material using a polyurethane resin is applied to asphalt concrete (hereinafter abbreviated as ascon) or a concrete base as it is, or after applying a base treatment or a primer. , In case of tennis court, 1-2mm per time
About three times with an application thickness of 4 to 5 mm, and then finish by applying a top coat on the surface. Also,
In the case of the ground material used in the athletic stadium, a polyurethane resin is laminated two or three times as a lower elastic layer so as to have a thickness of about 8 mm, a top coat layer is applied to a thickness of 2 to 3 mm, and finally, urethane is used as a surface layer. A pulverized elastomer product (chip; diameter: 2 to 7 mm) is sprayed and finished so that the entire thickness becomes about 13 mm. In the conventional method, materials having the same prescription are often applied repeatedly, and the means for changing the elasticity mainly involves changing the thickness. In order to balance hardness and physical properties, fine powders such as calcium carbonate and talc are added as a filler, but the material viscosity is kept relatively low. The urethane resin is applied by using a plastering iron, a saw blade squeegee (a resin coating plate having a triangular jagged edge having a constant height like a saw tooth) or the like by manual power, and using a 2-3 mm at a time. It has been constructed many times.

[0004] Although mechanical construction has been partially studied, as described in JP-B-56-27671, a method of filling a material containing a large amount of particulates obtained by mixing a rubber chip with a one-component urethane binder while rolling it into a frame is described. Ya, Tokiko 44-2291
As described in No. 4, there is a method in which a relatively low-viscosity material is mixed, then poured into a space where guide rails are laid on both sides, and height control is performed while sliding the guide rails on both sides with a ruler.

[0005]

In recent years, elastic pavement materials used in various sports competitions, especially pavement materials used in athletics grounds, have been subject to various demands for the purpose of improving the recording, and materials conventionally used have been used. It has become difficult to cope with adjustments in prescriptions and formulations. As a countermeasure, in addition to methods such as changing the composition of the undercoat (elastic) layer and the overcoat layer, making the thickness accuracy of each layer more accurate, and mixing resin chips with different hardnesses into liquid urethane, a composite structure Body or
It has become possible to adjust the strength of repulsion and the response time without changing the hardness of the entire pavement material by a method such as using a material having a high curing rate and high physical properties.
Further, in tennis courts and floors, since there is a strong demand for finishing a surface with high smoothness in a short period of time, it is necessary to spread a material having high physical properties and a high curing speed with high precision in a short time.

[0006] As a result of improving the composite itself to which the material itself and a resin chip are added in order to satisfy the required physical properties, the material has a high viscosity and a high curing speed. In addition, since the amount of resin chips to be added tends to increase, workability is affected, thereby lowering construction efficiency and deteriorating thickness accuracy. As an example of the material used, in the case of a track and field ground material, for the elastic layer of the undercoat layer, a soft liquid urethane resin is used to reduce the hardness, a foamed resin chip is used, and a hardness is used to increase the hardness. Add a non-foamed resin chip. If chips are added to the material, the viscosity of the whole system increases and it becomes difficult to spread the material. As the time increases, it is difficult to obtain a uniform structure because the layers are stacked in layers.

[0007] A common method of spreading the urethane material is as follows.
It is a manual operation that spreads the material, and the same place is leveled several times using a wide width, and the method of spreading the material to a predetermined thickness is adopted, so it is difficult to construct in a short time . Also, when using a general saw blade rake for leveling,
There is a problem that the resin chip is caught on the teeth and it is difficult to obtain thickness accuracy. In order to further ensure thickness accuracy, it is necessary to spread and spread many times, so if a material with a high curing speed is used, the material viscosity differs between the first half and the second half of construction,
It is very difficult to spread a uniform thickness, and the workability is further reduced due to the high viscosity especially in the second half. Furthermore, in the case of outdoor construction, the construction is affected by the weather, and if it continues to rain, the adhesion to the next layer will be poor, so it will be necessary to sand the surface immediately before constructing the next layer. There are also problems such as an increase in

[0008] The overcoat layer does not contain any chips, but it is necessary to apply a material having high physical properties and a high curing rate with a precision of about 2 mm. In this case, it can be installed manually using a conventional plastering iron or saw blade rake, but in each case, the process of spreading the resin many times is necessary,
It is very difficult to apply a urethane material, whose viscosity increases with time, to a wide area in a short time, and to secure good thickness accuracy, as the time required for the construction is long. Further, if the spread takes a long time, the material is cured before self-leveling due to a high curing speed of the material, and uneven coating occurs, resulting in a decrease in surface smoothness. The construction of a tennis court or the like has the same problem as the construction of the ground overcoat.

[0009]

Means for Solving the Problems The present inventors have increased the application speed without relying on human power, and can quickly apply even a resin chip-added product, a high-viscosity material and a material having a high curing speed, and have a smooth surface and a thick surface. As a result of intensive studies to obtain a machine capable of performing construction with good accuracy, the following construction machine was completed.

That is, the construction machine according to the present invention has a flat surface.
Concrete formed asphalt, asphalt concrete
Polyurethane, acrylic emulsion on a base such as
With an elastic pavement made of liquid resin such as
A support arm that extends from the vehicle onto the base to be installed
And the support arm so that it is almost perpendicular to the base.
At least one rotatable shaft rotatably mounted;
Move up and down on the rotation axis so that the edge is substantially parallel to the base
At least one rake movably mounted
And a motor for rotating the rotating shaft.
An elastic pavement construction machine, wherein the lower edge of the rake is
To keep the rake at a certain height from the base,
At least two adjustable protrusion lengths from the lower edge
Needle, knife or wheel rotation center from rake surface
It is characterized by attaching an offset wheel-shaped projection
It is assumed that. Also, multiple rakes
Rake with a rotating shaft attached to adjacent rotating shaft
May be configured so that the turning radii of the
Recommended. In addition, a circuit having at least one rake
A rake unit consisting of a plurality of spindles mounted on one frame
And install the entire rake unit on the support arm.
It is also recommended to be mounted so that it can be driven to rotate. Ma
The support arm can be driven to turn around the vehicle.
It is recommended to configure. Furthermore, the po
Made of liquid resin such as urethane and acrylic emulsion
A device for supplying an elastic pavement material to the vehicle.
Is also recommended.

[0011] The elasticity using the construction machine according to the present invention described above.
When installing paving materials, concrete with a flat surface
On a base such as REIT or asphalt concrete
Made of liquid resin such as urethane and acrylic emulsion
Step of supplying elastic pavement material continuously or intermittently
And at least one rake, with its lower edge at the base
Rotate while maintaining substantially parallel at a predetermined interval from
By moving the elastic pavement material in the desired traveling direction,
And spreading step are sequentially performed. That
In this case, multiple
Rakes attached to adjacent rotating shafts
The radii of rotation so that they partially overlap each other
Is recommended.

As described above, by using the construction machine according to the present invention, when performing the construction in which the elastic pavement material made of a liquid resin such as polyurethane or acrylic emulsion is laid on the base, it is conventionally merely a rake. In addition to the spread method that relied only on the operation of spreading the material, the rotation of the rake itself was added, so that it could be spread in a short time, improving construction efficiency, and achieving a flat and accurate thickness. A pavement surface made of a resin layer having accuracy can be obtained.

That is, by mechanizing a conventional manual leveling operation, a material having a high viscosity can be used. This can be applied to both the case where the material itself has a high viscosity and the case where a resin chip or the like is added.
In addition, since the time required for the application is short, a material having a high curing speed can be used, and at the same time, the application can be performed before the material thickens, so that the surface smoothness is improved and the accuracy of the thickness is easily ensured.

The vehicle that holds and moves the rake may be a vehicle that is driven manually, but is preferably driven by power.
For example, vehicles that move on two rails, such as railways, or tires or cars that move on endless tracks, backhoes, etc., are not particularly limited in terms of structure, but in consideration of site construction and the location is not so large, engines, Electric or battery powered small vehicles are preferred.

In the present invention, the movement for spreading the urethane material during construction includes (1) the rotational movement of the rake itself, and (2) the planetary movement (rotational movement of the rake) for rotating a rake unit combining a plurality of rakes. (3) a swing motion that moves the arm that supports the rake to the left and right, and (4) a rotary motion that moves the arm that supports the rake independently of the vehicle. The same movement as the driver's seat and arm rotating)) and
(5) There is a movement due to the running of the vehicle, and the movement of the combination of these movements spreads the elastic pavement material.
As a result, in the past, the work at the end and the corner was difficult to turn back with a fixed rake and the workability was bad, but in the present invention, the rotational motion was added, the operability was improved even in a narrow part, and the work in a short time was performed. It has become possible.

The method of fixing the rake is an important point, and the rake is securely fixed so as to maintain the verticality in order to secure the thickness accuracy. For vertical biasing, it is necessary to use a spring or its own weight landing and attach it with a degree of freedom of vertical movement. That is, it is necessary that the joint between the rake and the rotary shaft be slidable in the vertical direction, and that the protrusion attached to the rake be traced according to the unevenness of the base.

The number of rakes to be attached to one rotating shaft may be one or more, but practically it is easy to use up to about four rakes. The number of rakes varies depending on the thickness of the material to be spread and the properties of the material. The rake speed is also changed. This is because if the thickness of the material distributed on the base is thick, it is better to spread the material roughly first to spread it evenly, and then spread it out for accuracy, and to rake the rake more than a certain speed Rotational speed is considered necessary. Further, in order to obtain the final thickness accuracy, it is better to rotate at a low speed, and in some cases, the rotation may be stopped and spread.

The number of rotation axes of the rake attached to the support arm can be any number, and the greater the number, the greater the area that can be applied at a time. However, it is difficult to distribute the material on the base, The arm itself becomes heavy,
Since it is difficult to work in a narrow part and the workability is reduced, it is preferable that the number of support arms is about five.
However, in the compound rotary type, in which several rotating shafts are collectively attached to one frame and unitized, the unit is rotatably attached to the support arm, and the rotation of the entire unit is added in addition to the rotation of the rake itself, The number of rotation shafts mounted per support arm may be increased.

The mounting angle of the rake can be leveled while holding down the material in a state where the rake is attached to the base at a fixed inclination angle, but is preferably set perpendicular to the base. The rake used for manual work is used with an angle, but this is because the spreading direction is one direction and the thickness of the construction is finely adjusted by adjusting the angle, and the machine construction of the present invention In this case, it is not preferable to incline to one side because both sides of the rake are used under the same conditions.

It is desirable that the shape of the outer end of the rake be at a constant angle inward with respect to the traveling direction so that the material does not escape to the outside.

In order to keep the gap between the lower end edge of the rake and the base parallel and constant so as to secure a predetermined construction thickness, at least two protrusions are required to be attached to the rake. A close location is preferred. If the degree of unevenness of the base substrate is poor, a large number of projections may be attached. In this case, however, if there are a total of about four points, two points at portions near both ends. When the number of the projections is large, the accuracy of the thickness tends to decrease.

In order to properly set the accuracy of the thickness of the resin material, it is necessary that the protrusion has a structure that can be adjusted in height. The protrusion may have a needle shape, a knife shape, or a wheel shape. Good, but it is important that the cross-sectional area in the direction in which the materials are spread is small. This is because the protrusions move through the material, so that the material is pushed out to both sides, and if the natural flow of the material does not sufficiently compensate, the streaks may remain on the pavement surface and the smoothness may be reduced. That's why. By reducing the number and cross-sectional area of the projections, even when using a high-viscosity material, a material with a high curing rate, or a material with added chips, the surface required for the application is short and the surface is smooth. The property becomes good. Saw tooth rakes that have been used in the past are generally shaped like a regular triangle, so that approximately half of the spread area is the cross-sectional area of the rake, leaving a problem with the surface smoothness and adding chips. In many cases, the chips are often caught on the teeth, and the workability is significantly reduced. When a wheel-shaped projection is used, the center of rotation of the wheel is shifted from the rake surface when attaching to the rake body, and an offset is provided, so that the rake follows the movement of the rake and moves smoothly. When the rake is moved in both the front and rear directions, the wheel-like projections are attached to both sides of the rake, so that the rake can be easily moved in both front and rear directions.

Since the resin material to be spread is usually viscous and the liquid is pulled by the rake, the applied thickness is reduced to about 50 to 90% of the distance between the base and the rake. If the number of rakes and the number of rotations are changed according to the situation, the time required for construction is shorter.

The method of distributing the resin material for pavement includes a method of mixing and mixing the materials in advance in a mixing tank and then spreading the mixed materials on a base, and a method of mounting a mixing device on a vehicle (cart) for moving the rake. In addition, there is a method in which the hose is piped to the rake portion and spread while discharging continuously. The construction time is shorter for the continuous discharge method, but when the construction area is small, it takes more man-hours such as cleaning of the apparatus, so that it is suitable for construction in a wide place.

In the construction of the elastic pavement material using the construction apparatus according to the present invention, a two-component urethane resin is spread evenly after a base treatment or a primer is applied as necessary on a base such as ascon or concrete. As a high-viscosity material, it has become possible to spread even materials of about tens of thousands of centipoise. This is a significant improvement considering that the initial mixing viscosity of a commonly used material is not more than 10,000 centipoise (23 ° C.). Furthermore, regarding the curing speed, the pot life (time required for thickening to 100,000 centipoise after mixing two liquids) is about 60 minutes (23 ° C.), which is about 30 minutes compared to the conventional workability. It was enough and the choice of materials was widened. The chips to be added are rubber (pulverized) such as elastomer (non-foamed material) such as rubber, urethane, EVA, and EPT, or a crushed foamed material, having a particle size of 0.2 to 6.0 mm, preferably 0.5 to 3.0 mm.
3 to 3 parts per 100 parts by weight of polyurethane
In the case of an elastic layer (undercoat layer), a coating material having a thickness of about 8 mm is usually applied in the case where 0 parts, preferably 5 to 20 parts are blended. Conventionally, only 10 to 12 parts could be added in consideration of workability, but it is possible to add up to 30 parts by using the construction machine according to the present invention , so that the property change width of the ground material can be increased. became. In the case of the overcoat layer, the thickness is about 2 to 3 mm without adding a chip,
Also in this case, a material having a high viscosity and / or a high curing rate can be used.

According to the present invention, the time required for construction is short, and in particular, since the undercoat layer can be constructed with one layer, there is no need to worry about adhesion between layers. Work became unnecessary, work efficiency improved, and complaints decreased.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. Embodiment 1 (Construction Machine) The structure of an embodiment of a construction machine according to the present invention will be described with reference to FIGS. FIG. 1 is a plan view of the construction machine,
The work of spreading the elastic pavement material such as urethane material is mainly performed by rotating the rake (6) and running the vehicle (3) such as a cart. First, the rake is supported on the moving cart (3) driven by the engine. An arm (4) is installed, and two rakes (6) are attached to the tip of the support arm (4) on a rotating shaft (5; see FIGS. 2 and 3) rotated by a rake rotation motor (9). Counterweight (10) at the other end of the support arm (4) to balance
Attached. The size of the rake (6) is 2000m long
m, height 300 mm, thickness 5 mm, both ends 200 mm bent at both sides at an angle of 30 degrees. The distance from the fulcrum (40) of the support arm (4) with respect to the cart (3) to the rake rotation motor (9) is about 2 m, and the support arm (4) moves left and right in a horizontal plane about the fulcrum (40). At the same time, the structure is such that it can be turned by 60 degrees, and at the same time, it can be moved up and down by about 50 cm.

FIG. 2 is a side view of the construction machine shown in FIG. 1, showing that the cart is driven by an endless track (30), and the moving direction is forward (moving to the right side of the drawing) and reversing. It is possible to change direction.

FIG. 3 is a side view of the rake section. The rake (6) can be freely rotated right and left 360 degrees by the rake rotation motor (9). The motor (9) and the rake (6) are attached via a rake fixing jig (8) of a vertical slide type. This jig maintains verticality, but has a structure in which it can freely move up and down. . The rake (6) has a height-adjustable wheel (7; 12 mm in diameter, 10 mm in width, and 20 mm in offset) as a thickness adjusting projection, and is offset from the main plane of the rake, with both sides of the rake (300 mm from the end). 8) are mounted at each position. This allows the rake to move smoothly whether it rotates left or right. When the wheel (7) is used as a projection for thickness control, there is a concern that the wheel may be fixed by the material, but as long as the urethane material (2) is continuously supplied, the material of the wheel portion is a new material. This can prevent wheel sticking.

The outline of the construction method using the construction machine is as follows. The urethane material (2) distributed on the base or the urethane material (2) continuously supplied is converted into a cart (6) while rotating the rake (6). 3) Move forward and backward at a high speed to spread and spread, but when spreading, if the next spread is performed including the previously spread area, a smooth surface with no steps is easily obtained. . Thereby, the urethane material (2) can be applied accurately and in a short time.

Embodiment 2 (Construction Machine) FIG. 4 shows another embodiment of the construction machine according to the present invention. The construction machine of this embodiment has a structure in which the area to be spread at once is increased, the number of movable parts of the machine is increased, and construction can be performed in a shorter time. FIG. 4 shows a plan view of the construction machine. The length is 2000 mm, the height is 250 mm, and the thickness is 4 mm.
Two iron-made rakes (6a and 6b) are supported by two hydraulic motors (9a and 9b) capable of rotating 360 degrees at two positions of a 5-m long support arm (4; movable left and right 60 degrees in a horizontal plane by hydraulic pressure). It was mounted so that it could rotate. The 200mm tip of each rake (6a and 6b) is bent to both sides at an angle of 30 degrees, and the wheel-type projections (7, 7) are attached to the lower end of the rake, one at each side, 400mm from the end. (A total of four per rake). The mounting structure of the rake on the rotating shaft rotated by the hydraulic motors (9a and 9b) was fixed with a degree of freedom in the vertical direction as in the first embodiment. The hydraulic drive motor (9a) on the tip of the arm is located 1 m from the end of the arm, the inner motor is (9b) 1.5 m, and the radius of rotation of the rake (6a) on the tip and the inner rake (6b). In order to prevent collision between both rakes, a chain was mounted between the rotating shafts so that both rotations were synchronized. The support arm (4) is capable of turning 60 degrees left and right about the fulcrum (40). The transfer cart (3) is self-propelled by an engine and has a driver's seat (31) to which a support arm (4) is attached.
Can rotate 360 degrees freely with hydraulic pressure.
Therefore, the driver can perform the work while observing the spreading condition.

The actual construction is the same as in the first embodiment,
The urethane material (2) distributed on the base (1) is mainly used for the rotational movement of the rakes (6a and 6b) itself and the driver's seat (3).
The rotation of the support arm (4), which rotates together with the support arm (1), is carried out.

Embodiment 3 (Construction Machine) FIG. 5 shows still another embodiment of the construction machine according to the present invention. The construction machine of this embodiment is suitable for the case where the construction thickness of the elastic pavement material is small, and is composed of four relatively short rakes (6a to 6d) rotatably mounted on the frame (61). A rake unit (600) is constructed, and the rake unit (600) is supported by a support arm (4).
The rake is mounted so as to be rotatable by the hydraulic drive motor (62), and the rotation of each rake (6a to 6d) and the revolving motion of the rake unit (600) are combined to increase the area of the rake spread at a time and And a structure that can be constructed in a shorter time. A method for constructing a tennis court with urethane materials using the construction machine will be described.

Each of the rakes (6a to 6d) is made of an aluminum plate having a length of 1000 mm, a height of 200 mm, and a width of 3 mm, and has a diameter of 10 mm and a width of 6 m as a thickness adjusting protrusion.
m wheels with a 20 mm offset on each side of the rake, 200 mm from each end, one each (4 per rake)
Attached. Each rake is powered by a hydraulically driven motor (9
a to 9d) in the same manner as in the first embodiment, and hydraulic motors (9a to 9d) are attached to each corner of an iron frame (61) having a side of 1500 mm to form one unit. The hydraulic pressure for rake rotation was connected in series so that the rotation was synchronized. A hydraulic drive motor (62) is installed at the center of the rake unit (600), so that the entire unit can rotate. This unit has a length of 2.5
m support arm (4). The support arm (4) is movable in the horizontal plane similarly to the second embodiment (FIG. 4), and can be moved up and down by 500 mm at the fulcrum portion of the cart. Cart with this support arm (3)
Enables the same rotational movement as in the second embodiment.

The transfer cart (3) is equipped with a urethane mixing device (11), and has a structure capable of continuously supplying a urethane material through a hose (12). At the time of construction, the cart (3) to which the support arm (4) is attached is rotated while the rotation of the unit (600) is added to the rotation of the rakes (6a to 6d) itself. The rotation direction was clockwise for both the rake and the unit. Reverse rotation is also possible if necessary.

Construction Example 1 An athletics ground was paved using the construction machine according to the present invention.
An example of mounting will be described. After applying 1 kg / m ^{2 of a surface} treatment agent (Struct Bond; a mixture of Mitsui Toatsu Chemical Co., Ltd. and cement) on the ascon base, the following two-component urethane resin was used using the construction machine described in Example 1. The formulation was painted.

[Two-Component Urethane Resin Formulation] A urethane prepolymer having an NCO-terminated terminal by the reaction of polypropylene glycol (hereinafter abbreviated as PPG) and toluene diisocyanate (Hyprene P-306; NCO
% = 2.9, manufactured by Mitsui Toatsu Chemicals, Inc.). As a curing agent, a mixture obtained by kneading PPG, an amine-based crosslinking agent, calcium carbonate, red iron oxide, and a curing accelerator is used at a ratio of 100 parts by weight, and an equivalent ratio of isocyanate group to active hydrogen is 1.10.
One to one. Further, as a resilient aggregate, 20 parts by weight of a pulverized urethane elastomer having a particle size of 1.5 mm was added to 100 parts of the above-mentioned main agent + curing agent.

The mixture obtained by mixing only the main agent and the curing agent has an initial mixing viscosity of 8,000 centipoise (B-type viscometer / 2
3 ° C), which is rich in fluidity, but when a crushed urethane elastomer is mixed as an elastic aggregate, the initial mixing viscosity becomes 60,000 centipoise, and the fluidity becomes poor. The liquid viscosity was extremely difficult to apply. The liquid specific gravity of the mixture was 1.15 (23
° C), and the curability was set to a pot life of 35 minutes (23 ° C).

The undercoat layer is applied to a thickness of 8 mm. First, the above composition is stirred and mixed in a different place with a mortar mixer, and then the forklift is used to calculate a thickness calculated to be 8 mm on the front surface of the application machine. Distribute the material on the base. Next, the construction machine of the present invention shown in Example 1 (FIGS. 1 to 3) is moved to spread the materials. The height of the wheel (7) attached to the rake (6) was 12 mm.

The rake was performed at a speed of 5 m / min while rotating the rake clockwise 10 times per minute. The next spread leveling was performed in a state where the previously constructed portion was overlapped by 500 mm, and care was taken so that no step was generated. As a result, while the conventional construction was divided into two parts, the use of this construction machine allows the construction to be completed with a single spread, and at the same time the amount of chips to be added can be increased. The construction time has also been shortened. The accuracy of the thickness was very good at ± 0.5 mm with respect to the target of 8 mm, and the surface smoothness was also good.

Next, a urethane resin was used as an overcoat layer for 2.5 times.
It was applied to a thickness of mm, but in this case, the same material as the elastic layer was used without adding a chip. Since the base material has good smoothness and a low-viscosity material is applied thinly, the thickness-controlling projection is changed to a pin type to improve the surface property after spreading. The pin height was 3.2 mm, the rake speed was increased to 18 turns per minute, and the cart was moved at a speed of 8 m / min. When doing the next spread,
It was carried out in a state where the previously constructed portion was overlapped by 500 mm, and care was taken so that no step was generated. As a result, the thickness accuracy could be controlled at 2.5 ± 0.2 mm, and the smoothness was very good because the time required for construction was short.

As the finishing layer, a urethane resin was spread and spread in the same manner as the overcoat layer, and then a urethane chip pulverized to 3 to 5 mm was sprayed to form a ground for athletics.

Construction Example 2 A jogging course having a width of 8 m and a thickness of 10 mm was constructed using the construction machine described in the embodiment 2 (FIG. 4) and using the same materials as in the embodiment 1. First, as an undercoat layer, 8 mm of construction is performed. The setting conditions of the construction machine are as follows: the height of the construction thickness adjusting wheel (7) is 16 mm, and the rakes (6a and 6
The rotation speed of b) is 12 times / min, and the rake at the tip (6a)
Is clockwise and the inner rake (6b) is counterclockwise. The rotation movement of the driver's seat (31) to which the support arm (4) was attached was 5 seconds to move 90 degrees, and the same place was reciprocated and spread. When performing the next leveling, the part constructed last time was overlapped by 400 mm. As a result, the accuracy of the thickness was as very good as ± 0.5 mm with respect to the target of 8 mm, and the surface smoothness was also good.

Next, a 2 mm-thick urethane resin was applied as an overcoat layer. In this case, the same material as the elastic layer was used without adding any chips. The thickness adjusting projections were changed to pin types to improve the surface properties after spreading. The height of the pin is 2.8 mm, the number of rake rotations is increased to 24 per minute, and the rotation of the driver's seat with the support arm is 5 seconds to move 90 degrees and reciprocated in the same place and spread evenly. did. When performing the next spread, the previously constructed portion was overlapped by 300 mm. As a result, the thickness accuracy could be controlled at 2.0 ± 0.2 mm, and the smoothness was very good because the time required for construction was short.

Construction Example 3 A tennis court was constructed using the construction machine described in Example 3 (FIG. 5). The coating was performed by applying a total of 4 mm twice with an undercoat layer of 2 mm and an overcoat layer of 2 mm. The material used was a highly physical product. The main ingredient is Hyprene AX-
564C (manufactured by Mitsui Toatsu Chemical; NCO% = 5.5) was used, and the curing agent was PPG, as in the case of the material used in Example 1.
The amine-based crosslinking agent, calcium carbonate, red iron oxide, and curing accelerator were kneaded, but the amount of the crosslinking agent was increased. The composition is 10
The hardener was used in an amount of 100 parts with respect to 0 parts by weight, without using an elastic bone agent. The material was supplied at a rate of 50 liters / minute, and the support arm was moved 180 degrees for 1 minute, and reciprocated in the same place and spread. As a result, construction thickness accuracy is 2.0 ±
It could be controlled at 0.2 mm, and the smoothness was very good because the time required for construction was short. Do the same work twice and 4mm
Finished. The finishing layer was prepared by adding 50 parts of toluene as a solvent to a material obtained by adding 3 parts of anhydrous silica (Aerosil # 380; manufactured by Nippon Aerosil Co., Ltd.) as a thixotropy-imparting material to 100 parts of a urethane material to the same material as the overcoat layer. 50 parts of ethyl acetate was added and sprayed on the surface with a spray.

COMPARATIVE EXAMPLE 1 After the same groundwork treatment as in Example 1 was performed on the ascon base, the material used in Example 1 was manually applied using a plastering iron. However, because the material viscosity is high and the target coating thickness for one application is as thick as 8 mm, the plastering iron cannot spread the material while measuring the distance to the base, but only rubs the surface to make it smooth. , Thickness from 5mm to 11m
m, and the surface was rubbed many times using a short plastering iron, resulting in the remaining unevenness. Further, since the work requires a great deal of labor, the workers need to be replaced in a short time, and the number of workers is about twice as large. Furthermore, since the time required for the construction is long, it takes a considerable time from the kneading of the materials to the completion of the construction. In the latter half of the construction, the materials thicken due to a reaction, and it is more difficult to spread the materials. The construction efficiency was 1/4 or less of the case of mechanical construction.

Comparative Example 2 After the same primer as in Example 3 was applied on a concrete base, the material used in Example 2 was manually applied to a length of about 1
m saw blade rake (tooth angle is 60 degrees and height is 20 mm). Because the material viscosity is high and one person cannot move the rake, two people work and it takes time to construct,
As in Comparative Example 1, the material viscosity increased in the latter half of the construction, making the construction extremely difficult. Although the target thickness was 8 mm, the measurement result after construction was 8
At the same time, the surface lacked flatness of ± 2.5 mm, and at the same time, the surface was hardened at a high rate of curing. Furthermore, the pulverized product (chip) of foamed EVA clogged the narrow portion of the saw-tooth rake, which caused many streaks, and necessitated another additional application to correct the surface before applying the overcoat layer.

[0048]

Since the present invention is constituted as described above, according to the present invention, a high-viscosity material, a material having a high curing speed,
Alternatively, not only can a composite material to which chips and the like are added be finished in a short period of time on a pavement surface having an accurate thickness,
The construction speed is faster than the manual work of the conventional method, and the burden on the worker is reduced, and the uniformity of the thickness and the surface flatness after the construction can be secured.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a construction machine according to the present invention .

FIG. 2 is a lateral view of the construction machine shown in FIG.

FIG. 3 is a side view showing a configuration of a rake section of the construction machine shown in FIG.

FIG. 4 is a plan view showing another embodiment of the construction machine according to the present invention.

FIG. 5 is a plan view showing still another embodiment of the construction machine according to the present invention.

[Explanation of symbols]

 1 Base 2 Elastic pavement material 3 Vehicle 30 Endless track 31 Driver's seat 4 Support arm 5 Rotary axis 6 Rake 6a ~ 6d Rake 7 Projection 8 Rake fixing jig 9 Rake rotation motor 9a ~ 9d Rake rotation motor 10 Counter weight 11 Urethane mixing device 12 Hose

Continuing from the front page (72) Inventor Kisuke Seki 3-5-2 Kasumigaseki, Chiyoda-ku, Tokyo Mitsui Toatsu Chemical Co., Ltd. (72) Inventor Hiroshi Takano 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Inventor Hirohide Sakaguchi 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Inside Mitsui Toatsu Chemicals Co., Ltd. (56) References JP-A-61-72172 (JP, A) JP-A-60-191997 (JP, A) JP-A-57-15705 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01C 19/22

Claims (5)

(57) [Claims] 1. A construction machine which spreads an elastic pavement material (2) made of a liquid resin such as polyurethane or acrylic emulsion on a base (1) such as concrete or asphalt concrete having a flat surface. , Vehicle (3)
A support arm (4) extending onto a base (1) to be installed from above, and at least one rotating shaft (5) rotatably mounted on the support arm so as to be substantially perpendicular to the base; At least one rake (6) attached to the rotating shaft so as to be vertically movable such that a lower end edge is substantially parallel to the base, and a motor (9) for rotating the rotating shaft . meet our construction machinery of elastic paving material
To keep the lower edge of the rake (6) at a certain height from the base surface.
The rake from the lower edge of the rake so that
Adjustable at least two needles, knives or wheels
Wheel-shaped protrusion whose center of rotation is offset from the rake surface
A construction machine for an elastic pavement material, comprising a starting body (7) . 2. The elastic pavement material according to claim 1 , comprising a plurality of rotating shafts, wherein the rakes (6a, 6b) attached to the adjacent rotating shafts are configured so that the rotating radii partially overlap each other. Construction machinery. 3. A rake unit (600) comprising a plurality of rotating shafts having at least one rake attached to one frame (61), and the entire rake unit is rotationally driven by the support arm (4). 3. The construction machine for an elastic pavement material according to claim 1, which is attached as possible. 4. A construction machine of the elastic pavement material as claimed in any one of 3 to the support arm (4) the vehicle (3) claims 1 configured to pivot drivable manner about a. 5. A method according to claim polyurethane on said base, apparatus for supplying elastic pavement material made of liquid resin such as an acrylic emulsion (11, 12) mounted on the vehicle (3) 1
To construction machine of the elastic pavement material as claimed in any one of the four.