JPH09279510A - Mortar laying leveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a quality of a dam main body by lowering a screed main body on a placing surface, temporarily storing it by uniformly filling mortar of a mortar hopper by reciprocatively moving a nozzle in a laterally long screed main body by a nozzle moving means, and delivering a preset fixed quantity of mortar from a mortar delivery port together with a start of a movement of a vehicle. SOLUTION: When a force feed pump 4 is driven, mortar is temporarily stored by being forcibly fed in a screed main body 8 through a flexible hose 5 and a nozzle 6. When mortar is forcibly fed, the nozzle 6 is reciprocatively moved over the total wide length in the screed main body 8 by a nozzle moving means 7, and the mortar delivered from the nozzle 6 is filled by a uniform quantity over its total length in the screed main body 8. Next, a door body 30 is opened by a prescribed quantity, and when a vehicle 1 is advanced, a necessary quantity of mortar is delivered from a mortar delivery port 9.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mortar leveling method and apparatus.

[0002]

2. Description of the Related Art Generally, in the construction work of a concrete dam, when the next concrete is placed on the concrete placed last time, a new concrete is added in order to have integrity with the newly placed concrete. Immediately before pouring, mortar is laid on the concrete joint surface to a thickness of about 1.5 cm. The columnar driving method and the RCD method are used to spread the mortar. The columnar construction method has a small construction area, so the mortar carried in a concrete bucket or the like is discharged to the construction surface and then laid out manually using a dragonfly, and the RCD construction method has a wide construction surface. Therefore, after discharging the mortar carried by the dump onto the placing surface, the bucket of the wheel loader and its bottom surface are used to spread the mortar.

[0003]

The RCD method is widely adopted because it has a higher construction efficiency than the column driving method, but the work of laying it while delicately controlling the height of the bucket of the wheel loader is performed. Therefore, most of the work depends on the skill and feeling of the operator, and the unevenness of the mortar spread and the loss of the mortar material often occur due to the wheel load of the wheel loader. For this reason, where the mortar is thin, it will cause water leakage when water is flooded in the future, and since the wheel loader has many degrees of freedom in the direction in which it moves, it poses a large risk of affecting nearby workers. have. As described above, there is a problem that it is impossible to realize unmanned construction by wireless remote operation of the wheel loader because the operation of the wheel loader requires a high degree of skill, and since there are many degrees of freedom in the directionality when moving, it is complicated. Was there. Therefore, an object of the present invention is to provide a mortar laying method capable of laying a mortar of uniform thickness on a placing surface, and a mortar that is simple in operation and has improved safety during work. To provide a leveling device.

[0004]

In order to achieve the above object, the present invention is a mortar leveling apparatus mounted on a vehicle capable of self-propelled movement, the mortar hopper mounted on the vehicle, and the vehicle. A screed body provided in the rear of the vehicle so as to be capable of moving up and down, extending in the width direction of the vehicle, and having an upper and lower portion opened to form a horizontally long tubular shape, which enables temporary storage of mortar, and raising and lowering the screed body Means, a nozzle moving means for reciprocating the nozzle in the extending direction of the screed body above the screed body, a mortar supply means for supplying the mortar in the mortar hopper to the nozzle, and a lower end of the rear surface of the screed body. And a mortar discharge port adjusting means for adjusting the vertical width of the mortar discharge port. And wherein the Rukoto.

Further, according to the present invention, the mortar discharge port adjusting means has a door body whose upper end is pivotally supported by an upper edge of the mortar discharge port and which extends over the entire length of the mortar discharge port and is capable of swinging backward. And a door body swinging means for swinging the door body. Further, the present invention is made of an elastic material, which is elastically contacted with the mortar driving surface at the lower ends of the front and left and right side surfaces of the screed body and seals between the lower ends of the front and left and right side surfaces of the screed body and the mortar driving surface. It is characterized in that the plate is attached. Further, the present invention is characterized in that a guide wheel rolling on the mortar placing surface is provided on the front surface of the screed body. Further, according to the present invention, the screed body and the elevating means are connected by a parallel movement mechanism so that the screed body itself can always move up and down while maintaining a constant posture in a state where the screed body is lowered. Is characterized by.

In the present invention, when laying mortar, the screed body is lowered onto the placing surface and the nozzle moving means reciprocally moves the nozzle in the screed body while the mortar in the mortar hopper is evenly distributed in the screed body. Supply. Then, by setting the mortar discharge port to a desired opening by the mortar discharge port adjusting means and moving the vehicle forward, the mortar is evenly spread on the mortar placing surface with a thickness determined by the mortar discharge port. To be done.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a mortar leveling apparatus according to the present invention will be described. FIG. 1 is a side view of the mortar leveling apparatus of the present invention, and FIG. 2 is a plan view of the mortar leveling apparatus. The mortar leveling apparatus 100 is mounted on the vehicle 1 that is capable of moving by itself. The mortar leveling device 100 includes a mortar hopper 2 mounted on a vehicle 1, a screed main body 8 provided at a rear portion of the vehicle 1 so as to be capable of moving up and down,
Elevating means 21 for the screed body 8, nozzles 6 arranged on the top of the screed body 8, nozzle moving means 7 for reciprocating the nozzle 6, mortar supply means 3 for supplying the mortar in the mortar hopper 2 to the nozzle 6, screed body The mortar discharge port 9 formed at the lower end of the rear surface of the mortar 8, the door body 30 facing the mortar discharge port 9, the door body swinging means 31 for swinging the door body 30, and the like.

The mortar supply means 3 includes a mortar pressure feed pump 4, a pipe body 502 for connecting a discharge port of the mortar pressure feed pump 4 and a bearing portion 102 provided at the upper center of the rear portion of the vehicle 1, and a bearing. A flexible hose 5 which is connected to the pipe body 502 in the portion 102 and has a nozzle 6 connected to the tip thereof.
It is composed of

The nozzle moving means 7 is composed of a frame 10, a hydraulic double rod type double acting cylinder 11, a wire rope 13 and the like. The frame body 10 is attached to the rear end of the vehicle 1 so as to be capable of moving up and down via the elevating means 21, and the frame body 10 is horizontally long in the vehicle width direction and is arranged in front of the screed body 8.
Rails 15 extending in the vehicle width direction are provided above and below the rear part of the vehicle 0, respectively. Two fixed wheels W1 are rotatably supported at both ends in the vehicle width direction inside the frame body 10, and the both rod-type double-acting cylinders 11 are arranged in the center of the frame body 10 in the vehicle width direction. ing. A bracket 12 is attached to the tip of each rod R1, R2 of the double rod type double acting cylinder 11.
Are attached to each bracket, and 2 are attached to each bracket 12.
The individual moving wheels W2 are rotatably supported.
One end of the wire rope 13 is fixed to one end of the frame body 10, and then the wire rope 13 is alternately hooked to the two moving wheels W2 and the two fixed wheels W1 on one side, and further the other two wheels on the other side. Moving side wheel W2 and fixed side wheel W
1, and the other end is fixed to the other end of the frame body 10.

The nozzle 6 is supported above the screed body 8 by the nozzle support means 14, and the nozzle support means 14 is provided.
As shown in FIGS. 2 and 3, a frame 17, a pair of rollers 16 provided on the upper and lower sides of the frame 17 and engaged with the upper and lower rails 15, and a wire rope 13 protruding forward from the frame 17. The arm 18 is fixed to the arm 18 and a pair of nozzle holders 19 projecting from the rear surface of the frame 17 to vertically hold the nozzle 6 are provided.
Is fixed to the wire rope 13 that connects between the fixed wheels W1 and W1 at both ends of the frame body 10. As a result, the nozzle 6 is reciprocated in the screed body 8 via the wire rope 13 and the nozzle support means 14 by alternately moving the rods R1 and R2 of the cylinder 11 forward and backward. In this case, the moving amount of the nozzle 6 by the double rod type double acting cylinder 11 is two fixed wheels W1 and W2.
Since the individual moving wheels W2 are combined, a stroke 4L that is four times the stroke L of the cylinder 11 can be obtained. The wire rope and wheel used for moving the nozzle are not limited to this, and may be a combination of a chain and a sprocket.

The elevating means 21 comprises a hydraulic cylinder 23 which is vertically attached to the rear end of the vehicle 1. Rails 24 are provided above and below the rear end of the vehicle 1, and the frame 1
A roller 25 supported by 0 is arranged so as to sandwich the rail from the left and right, and a cylinder 2 is mounted via a bracket 27 attached to the tip of a piston rod 26 of the cylinder 23.
3 and the frame body 10 are connected, and the frame body 10 is configured to move up and down by the expansion and contraction of the piston rod 26.

The screed body 8 is formed in a laterally long rectangular shape in the vehicle width direction and has a cylindrical shape with its upper and lower portions opened. A mortar discharge port 9 is provided at the lower end of the rear surface of the screed body 8, and the screed body 8 is formed. A pair of left and right guide rollers 20 are provided on the lower part of the front surface. The mortar discharge port 9 is
It is formed by an opening formed over the entire length of the screed body 8. A hinge 29 is provided on the upper edge of the mortar discharge port 9.
The door body 30 is attached via the mortar discharge port 9 by means of a hydraulic cylinder 31 (door body swinging means).
Of the mortar M can be swung rearward, and the opening angle of the door body 30 can be changed steplessly by varying the operation stroke of the piston rod by the cylinder 31, and the discharge amount of the mortar M can be set appropriately. Has been done. In this embodiment, the mortar discharge port adjusting means for adjusting the vertical width of the mortar discharge port 9 is composed of the door body 30 and the cylinder 31. Further, a rubber plate 32 made of an elastic material such as rubber is attached to the front surface and the lower ends of the left and right side surfaces of the screed body 8, and thereby the lower surface of the screed body 8 in the lowered position and the driving surface G are formed. The gap is sealed.

The front surface of the screed body 8 is swingably supported on the lower end of the frame 10 by a parallel motion mechanism 22, and more specifically, the screed main body 8 is arranged so as to be vertically moved by the parallel motion mechanism 22 while maintaining a vertical posture. Has been done. And the frame body 10
A stopper 28 is projectingly provided at the lower end of the so as to come into contact with the lower link 22A constituting the parallel movement mechanism 22. The stopper 28 prevents the link 22A from swinging downward when the screed body 8 is in the raised position.
It is configured to be regulated by. Further, when the screed body 8 descends and the guide roller 20 comes into contact with the driving surface G, the link 22A is separated from the stopper 28 and the vertical movement of the cred body 8 is allowed. When 8 is in the lowered position, it is supported on the placing surface G by the guide roller 20, and during mortar spreading, the screed body 8 moves up and down while following the irregularities on the placing surface G and maintaining a vertical posture. can do.

Further, the screed main body 8 is equipped with a vibration generator (not shown) near the mortar discharge port 9 so that the mortar discharged by this is adhered to the placing surface G by pressure. The self-propelled vehicle 1 is equipped with a communication device and an automatic control device (not shown), and is driven unmanned by wireless remote control.

Next, the mortar leveling method of the present invention will be described. First, the vehicle 1 is moved to the mortar casting start position. In this case, the cylinder 2 that constitutes the lifting means 21
3, the frame body 10 and the screed body 10 are positioned at the raised position, and the lower link 22A of the screed body 8 abuts against the stopper 28 to prevent the screed body 8 from swinging downward and away from the ground. Therefore, the vehicle 1 travels smoothly.

When the vehicle 1 reaches the mortar placing start position, the cylinder 23 of the elevating means 21 is contracted. Due to the reduction of the cylinder 23 of the elevating means 21, the frame body 10 and the screed body 8 are lowered, and the guide roller 20 is placed on the driving surface G.
When it comes into contact with, the link 22A, which has been restricted from swinging downward until now, separates from the stopper 28. This allows the screed body 8 to move up and down, so that when the vehicle 1 moves forward and the mortar M is spread on the placing surface G, the screed body 8 follows unevenness on the placing surface G. However, the mortar can be laid on the placing surface G to have a uniform thickness by moving vertically while maintaining the vertical posture. In this state, the screed body 8 is supported by the guide roller 20 on the driving surface G, and a gap is formed between the lower end of the screed body 8 and the driving surface G, but other than the mortar discharge port 9. A rubber plate 32 seals the gap at the lower end periphery to prevent mortar from leaking to the front and left and right sides of the screed body 8.

Next, when the mortar pressure pump 4 driven by the engine of the vehicle 1 is driven, the mortar M in the mortar hopper 2 enters the screed body 8 through the flexible hose 5 and nozzle 6. It is pumped and temporarily stored. When the mortar M is fed under pressure, the nozzle 6 is reciprocally moved within the screed body 8 by the nozzle moving means 7. More specifically, when the double rod type double acting cylinder 11 shown in FIG. 3A is operated to reduce one rod R1 (left side in the figure) and at the same time extend the other rod R2 (right side in the figure). The wire rope 13 is pulled leftward, and the nozzle support means 14 fixed to the wire rope 13 can be moved leftward from the position shown in the drawing. Next, when the other (right side in the figure) rod R2 is contracted and at the same time one (right side in the figure) rod R1 is extended, the wire rope 13
Can be pulled rightward, and the nozzle support means 14 fixed to the wire rope 13 can be moved rightward. As a result, the nozzle 6 supported by the nozzle support means 14 moves a distance 4L that is four times the rod R1 stroke L while the rod R1 moves the entire stroke L,
It can move over the entire width of the screed body 8. In this way, the nozzle 6 is reciprocated within the screed body 8 over the entire width, and the mortar M discharged from the nozzle 6 is filled in the screed body 8 in a uniform amount over the entire length. The reciprocating speed of the nozzle 6 can be adjusted according to the discharge amount of the mortar pressure pump 4.

Next, the door 30 is opened by a predetermined amount and the vehicle 1 is opened.
When is moved forward, a required amount of mortar M is discharged from the mortar discharge port 9. As a result, the mortar M having a uniform thickness is spread on the placing surface. Therefore, the loss of the mortar material is reduced, water leakage at the time of flooding is eliminated, and the quality of the dam body can be improved. Also, the mortar discharge port 9
Since a vibration generator (not shown) is installed in the vicinity, vibration is given as the mortar is discharged, and the mortar is placed on the surface G.
Can be reliably attached to. In this case, a device for detecting the amount of mortar is attached to the screed body 8, and the discharge amount of the mortar pressure pump 4 is adjusted according to the amount of mortar in the screed body 8 to make the amount of mortar temporarily stored in the screed body 8 uniform. It is more advantageous to make the mortar uniform in thickness.

Incidentally, the nozzle moving means 7 for reciprocating the nozzle 6 and the elevating means 21 for elevating the screed body 8 are provided.
Is not limited to the structure of the embodiment, and various conventionally known structures can be used. Further, in the embodiment, the case has been described in which the mortar discharge port adjusting means for adjusting the vertical width of the mortar discharge port 9 is composed of the door body 30 and the cylinder 31, but the door body 30 is vertically moved vertically or the like. The vertical width of the mortar discharge port 9 may be adjusted by another structure, but if a structure for swinging the door body 30 rearward is adopted as in the embodiment, the mortar is moved along with the movement of the vehicle 1. Is advantageous in smoothly flowing out of the screed body 8 onto the mortar-placing surface.

[0020]

As described above, according to the mortar leveling apparatus of the present invention, the screed body is lowered onto the placing surface, and the nozzle moving means reciprocates the nozzle into the horizontally long screed body to make the mortar hopper. The mortar inside is evenly filled and temporarily stored, and a predetermined fixed amount of mortar is discharged from the mortar discharge port when the vehicle starts moving, so the mortar is spread evenly on the placing surface. As a result, the loss of the mortar material can be reduced, water leakage at the time of flooding can be eliminated, and the quality of the dam body can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a mortar leveling device of the present invention.

FIG. 2 is a plan view of the mortar leveling device of the present invention.

FIG. 3A is a front view of a lateral movement unit, and FIG. 3B is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 2 Mortar hopper 3 Mortar supply means 4 Mortar pressure pump 6 Nozzle 7 Nozzle moving means 8 Screed body 9 Mortar discharge port 20 Guide roller 21 Elevating means 30 Door body 31 Door body swinging means 32 Rubber plate G Placing surface M Mortar

Claims (5)

[Claims] 1. A mortar leveling device mounted on a vehicle capable of self-propelled movement, comprising a mortar hopper mounted on the vehicle, and a mortar hopper provided at a rear portion of the vehicle so as to be vertically movable. A screed body extending in the upper and lower portions of the screed body, which is formed in a horizontally long cylindrical shape and is capable of temporarily storing mortar; an elevating means for elevating and lowering the screed body; Nozzle moving means for reciprocating in the extending direction, mortar supplying means for supplying the mortar in the mortar hopper to the nozzle, and mortar spout formed at the lower end of the rear surface of the screed body extending in the longitudinal direction of the screed body. A mortar leveling device, comprising: an outlet; and a mortar outlet adjusting means for adjusting the vertical width of the mortar outlet. 2. The door body, wherein the mortar discharge port adjusting means has a top end pivotally supported by an upper edge of the mortar discharge port, extends over the entire length of the mortar discharge port, and is capable of swinging backward. The mortar leveling device according to claim 1, wherein the mortar leveling device comprises a door swinging means for swinging the mortar. 3. A plate made of an elastic material, which is elastically contacted with the mortar driving surface at the lower ends of the front and left and right side surfaces of the screed body and seals between the lower ends of the front and left and right side surfaces of the screed body and the mortar driving surface. Claim 1 or 2 which is attached
The mortar leveling device described. 4. A guide wheel rolling on a mortar placing surface is provided on a front surface of the screed body.
The mortar spreader according to 2 or 3. 5. The parallel movement mechanism is connected between the screed body and the elevating means so that the screed body itself can be vertically moved while always maintaining a constant posture in a state where the screed body is lowered. The mortar spreader according to 1, 2, 3 or 4.