JPH0565643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a concrete leveler for leveling the surface of concrete placed on a paved surface such as a road or track.

<Conventional technology> The width of roads, tracks, etc. on which concrete is poured differs depending on the site. Therefore, the lateral movement range of the screed, that is, the width of the frame of the concrete leveler and the length of the track of the traversing truck, must be adjusted according to the width of the site of the concrete leveler that levels the concrete surface.

In conventional concrete levelers, an adapter or spacer is removably attached between a vertical frame equipped with wheels and a horizontal frame on the screed side, and the width is adjusted by replacing the adapter or spacer.

<Problems to be Solved by the Invention> However, the task of replacing adapters and the like each time requires hanging a heavy frame for a long period of time, which requires a great deal of effort and time. Furthermore, if the width is adjusted by replacing adapters or the like of different sizes, even if the width can be adjusted in large steps, it is not possible to make minute adjustments, and it is also impossible to make adjustments during construction.

<Means for Solving the Problems> The present invention has been proposed in view of the above, in which a left vertical frame and a right vertical frame each having wheels are arranged approximately parallel to each other, and a fixed cylinder is inserted into the openings at both ends of the fixed cylinder. A horizontal frame is constructed by fitting together short movable cylinders so that they can expand and contract, and the tip of one movable cylinder of the horizontal frame is connected to the left vertical frame, and the tip of the other movable cylinder is connected to the right vertical frame. Then, the end of the extensible member, which can be expanded and contracted by driving the drive source, is connected to the vertical frame side, and the center rail, which extends almost parallel to the horizontal frame, is fixed to the fixed cylinder of the horizontal frame, and the left vertical frame is connected to the left vertical frame. A left side moving rail with its base end fixed on the side and a right side moving rail with its base end fixed on the right frame side are respectively arranged parallel to the above-mentioned center rail to form a track, and a transverse bogie is provided so as to be able to run on this track. A screed is provided on the top.

<Function> When the length of the extensible member is changed by activating the drive source, the length of the horizontal frame changes and the interval between both vertical frames changes. When the distance between the vertical frames changes, the movable rail with one end fixed to each vertical frame moves, and the horizontal overlap length with the central rail changes, and the length of the track automatically changes according to the amount of movement of the vertical frames. change. Therefore,
The traversing truck can travel on an expanded and contracted track.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, the concrete leveler 1 includes a left vertical frame 3a and a right vertical frame 3b having wheels 2, which are arranged almost parallel to each other, and both vertical frames 3
A and 3b are connected by an extensible front horizontal frame 4a and a rear horizontal frame 4b to form a rectangular main frame, and a front horizontal auxiliary frame 5a is extensible between the front and rear parts of both vertical frames 3a and 3b. and are connected and reinforced by the rear lateral auxiliary frame 5b, and expandable and contractible members 6, 6, which can be expanded and contracted by the drive of the drive source, are installed near the front lateral frame 4a and near the rear lateral frame 4b, approximately relative to the lateral frames 4a, 4b. Arrange them in parallel and connect both ends of each telescopic member 6 to the left and right vertical frames 3.
Central rails 7, 7 connected to the side and extending almost parallel to the horizontal frame 4 are fixed to the horizontal frame 4 side, and movable rails 8, 8, one end of which is fixed to the left and right vertical frame 3 sides, are connected to the central rail. A screed 10 is provided on a transverse carriage 9 which is parallel to the rail 7 and can run on a track constituted by a central rail 7 and moving rails 8, 8.

The vertical frame 3 is a hollow rectangular column that is elongated in the front and back direction, and has a height adjustment mechanism 1 attached to the front and rear ends.
Connect the lower end of each rod 1 and 11 to the trolley 12,
The cart 12 is provided with wheels 2, and the rear cart 12 is provided with a traveling hydraulic motor 13 as a drive source for driving the wheels 2. A chain connects the sprocket attached to the sprocket. Note that the height adjustment mechanism 11 may have any configuration as long as it can adjust the height of the vertical frame 3 with respect to the wheels 2, but in this embodiment, a hydraulic motor (not shown) is used to adjust the external thread. The rod is configured to expand and contract by changing the screwing position with the female thread by rotating, and the front and rear are interlocked. Further, a hydraulic motor 14 is attached to the inner side surface of the vertical frame 3 as a drive source for adjusting the width of the frame, and a hydraulic motor 14 is installed between the sprocket 15 located inside the vertical frame 3 and the sprockets 16, 16 of the telescopic member 6. are connected by tune 17,
Further, a hydraulic motor 18 is provided on the top surface as a drive source for driving the traversing truck 9, and an elongated drive shaft 19 is connected to the output shaft of the hydraulic motor 18.

The horizontal frame 4 is a double cylindrical body in which movable cylindrical bodies 21, 21, which are shorter than the fixed cylindrical body 20, are fitted into openings at both ends of a large-diameter fixed cylindrical body 20. is provided with fixing means 22, 22 such as screws for fixing the movable cylindrical body 21, and the ends of the movable cylindrical bodies 21, 21 protruding from the fixed cylindrical body 20 are fixed to the side surfaces of the left and right vertical frames 3a, 3b. . Therefore, when the length of the overlap between the fixed cylindrical body 20 and the movable cylindrical body 21 is changed by moving the movable cylindrical body 21 in the length direction with the fixing means 22 loosened, the horizontal frame 4 can be assembled as a whole. The length of the movable cylindrical body 21 can be changed, that is, it can be expanded or contracted, and when the fixing means 22 is tightened, the movement of the movable cylindrical body 21 can be prevented and the entire length can be fixed. The center rail 7 is fixed to the fixed cylindrical body 20 of the horizontal frame 4 in a substantially parallel state with a support member interposed therebetween.

The horizontal auxiliary frame 5, like the horizontal frame 4,
The fixed square cylinder 23 is placed inside the openings at both ends of the fixed square cylinder 23.
It is a double cylinder body in which movable rectangular cylinders 24, 24 which are shorter than the above are fitted, and the overall length can be adjusted by moving the movable rectangular cylinder 24.

The above-mentioned horizontal frame 4 and horizontal auxiliary frame 5 are not limited to double cylinders, but may have any structure as long as they are expandable and can withstand loads as a structure.

The extensible member 6, which is disposed approximately parallel to the horizontal frame 4 and the horizontal auxiliary frame 5, has a length that is approximately the same as the length of the fixed cylindrical body 20 of the horizontal frame 4, and has a female threaded portion on the inner peripheral surface. It consists of a formed cylindrical base part 25 and elongated rotary and extensible parts 26, 26, each having a male screw part formed on the outer periphery to be screwed into the female thread part 25 of the base part 25 material. 4 is fixed to the fixed cylindrical body 20 side so as to be unrotatable, and the ends of the rotary extensible parts 26, 26 protruding from the base part 25 are supported by bearings on the side surfaces of the vertical frame 3, and the sprocket 1 is protruded from the bearings and attached to the tip.
6, and connect the chain 17 to the sprocket 16.
is hung. Therefore, when the rotary telescoping part 26 is rotated via the chain 17 by the operation of the hydraulic motor 14, the female thread of the base part 25 does not rotate, so the direction of rotation and the amount of rotation of the male thread screwed into the female thread do not rotate. Depending on the situation, the rotary and extensible portion 26 is screwed into the inside of the base portion 25 to shorten the overall length, or conversely, it extends and becomes longer. In addition, in this embodiment, since the rotary extension/contraction parts 26 on the left sides or on the right sides are configured to rotate by the same angle, the left vertical frame 3a or the right vertical frame 3b can be moved independently.

Further, the telescopic member 6 may have any configuration as long as the distance between the left and right vertical frames 3, 3 can be changed by movement of the drive source; for example, it may be a long hydraulic cylinder that extends and retracts the rod by driving a hydraulic pump. good.

Since the front and rear parts of the left vertical frame 3a and the right vertical frame 3b are connected by the telescopic member 6, when the four rotary telescopic parts 26, front, rear, left, and right are simultaneously rotated by the drive of both hydraulic motors 14, 14. ,
The entire length of the front and rear expandable members 6, 6 expands and contracts in the same way,
As a result, the front horizontal frame 4a and the rear horizontal frame 4b
expands and contracts in the same way, and the width of the concrete leveler 1 increases or decreases.

When the left and right vertical frames 3a, 3b move in the width direction as described above, each movable rail 8, whose one end is fixed to the vertical frame side, also moves together with the vertical frames 3a, 3b, and this movement causes the horizontal movement of the center rail 7. Polymerization length changes. Therefore, the central rail 7
The length of the track formed by the left and right moving rails 8, 8 automatically expands and contracts as the vertical frames 3, 3 move.

The transverse bogie 9 that runs on the track is an elongated frame body that is slightly longer than the distance between the front and rear tracks, and is equipped with wheels 27 at the corners that can run on the track, and is approximately at the center of the length. A screen 10 is suspended from the top. The wheels 27 described above can run on the center rail 7 and the moving race 8 that extend independently while being shifted back and forth, and can also run on the lateral overlapping portion of the wide center rail 7 and the moving rail 8. To ensure smooth running, flange portions are formed on both side edges of the circumferential surface at intervals that allow the lateral overlapping portions of the center rail 7 and the moving rail 8 to fit together. Also,
The ends of each of the rails 7 and 8 are formed diagonally so that the wheels 27 can run smoothly on the lateral overlapping portion of the center rail 7 and the moving rail 8.

In order to make the traversing cart 9 reciprocate along the track in the width direction of the concrete leveler 1, in this embodiment, as shown in FIG. A sprocket 29 is rotatably attached to each support 28,
In addition, a sprocket 31 is rotatably attached to the tip of an arm 30 extending laterally from the side surface of the vertical frame 3 at a position higher than the sprocket 29, and a chain 32 whose one end is connected to the transverse truck 9 is connected at the middle. The drive shaft 19 provided on the left vertical frame 3a is hooked onto the sprocket 33 to change the direction, and then the arm portion 30
The upper sprocket 31 at the tip of
29, and then hooked on the other arm side sprocket 31 to change the direction.The end of the chain 32 is hooked on the sprocket 33 of the other right vertical frame 3b to change the direction, and then the other end of the chain 32 is hooked on the traversing truck 9. Connecting. Therefore, when the hydraulic motor 18 is actuated to rotate the drive shaft 19 in one direction, the chain 32 moves while being guided by each sprocket 29, 31, and 33, and the transverse truck 9 is moved from one end of the track to the other end. When the drive shaft 19 is rotated in the opposite direction, the chain 32 is moved in the opposite direction, and the traversing truck 9 can be moved from the other end of the track toward one end. In the state shown in FIG. 3, the width of the concrete leveler 1 is maximized by fully extending the horizontal frames 4a and 4b, and the transverse truck 9 moves along the extended track in the left and right directions as described above. It is possible to reciprocate between frames 3a and 3b. Then, the left and right moving cylindrical bodies 21, 21
As shown in FIG.
The sprocket 29 attached to the column 28 of 0 and the sprocket 31 attached to the arm 30 of the vertical frame 3
The distance between the two ends increases in accordance with the moving length of the moving cylindrical body 21. Therefore, the chain 32 does not slacken, and when the drive shaft 19 is rotated by operating the hydraulic motor 18, the traversing truck 9 smoothly reciprocates on the track in the same manner as described above.

The screed 10 hanging from the traversing truck 9 is provided with a screed frame 35 which is elongated in the front-rear direction (left-right direction in FIGS. 1 and 2) at the lower end of the support 34 from the traversing truck 9. A screed plate 36 is provided on the open lower surface of the screed frame 35 so as to be movable in the front-back direction, and a drive mechanism is provided inside the screed frame 35 to drive the screed plate 36. The screed plate 36 is made of a plate material with a flat bottom surface, and as shown in FIG. 5, a sliding rod 38 is provided along the length direction (back and forth direction) between brackets 37, 37 provided on the sides of the top surface. The sliding rod 38 is passed through a through hole 40 of a sliding bearing shaft 39 fixed in the width direction within the screed frame 35, so that it is supported so as to be movable in the front and rear directions relative to the screed frame 35.
The drive mechanism for reciprocating this screed plate 36 in the front and back direction includes a hydraulic motor 41 provided on the screed frame 35, and a rotary plate 4 attached to the output shaft of the hydraulic motor 41 and having an eccentric pin 42.
3, and a connecting rod 46 which has one end rotatably connected to the eccentric pin 42 of the rotary plate 43 and the other end rotatably connected to the shaft 45 of the receiving fitting 44 of the screed plate 36. The connecting rod 46 reciprocates the screed plate 36 in the front-back direction with respect to the screed frame 35 by the crank action of the eccentric pin 42 which rotates the rotating plate 43 by the operation of the hydraulic motor 41.

In addition, adjustment mechanism 1 that adjusts the height of the frame
1. Hydraulic equipment such as the hydraulic motor 14 that rotationally drives the rotating telescoping section 26 of the telescoping member 6 and the hydraulic motor 18 that reciprocates the transverse truck 9 in the width direction are driven by an engine 47, as shown in FIG. It is operated by hydraulic oil pumped from operating pumps 48, 48, and the hydraulic oil supplied by each hydraulic device is controlled by solenoid valves 49 and the like. Even when the traversing truck 9 moves back and forth on the track, the trolley cable 51 is freely bent to the hydraulic motor 41 that moves together with the traversing truck 9, so the hydraulic oil pumped from the pump 49 is smoothly supplied. Does not affect operation.

Although a hydraulic motor is used as the drive source in this embodiment, the drive source in the present invention is not limited to these, and may be an electric motor or the like.

When leveling the surface of poured concrete using the concrete leveler 1 configured as described above, if the width of the poured concrete is constant, the expandable members 6, 6 are operated to match this width. The distance between the left vertical frame 3a and the right vertical frame 3b, that is, the length of the track constituted by the center rail 7 and the moving rails 8, 8, is adjusted, and the horizontal frame 4
Tighten the screw 22 of the fixing means. Once this kind of adjustment work is completed, the hydraulic motor 1 for traveling
3, the wheels 2 of the cart 12 are rotated to move the poured concrete forward at low speed along the length direction of the poured concrete on the rails 50 laid on both sides of the poured concrete, and at the same time the hydraulic motor 18 for traversing is activated.
By operating the screed plate 36, the transverse truck 9 is reciprocated in the width direction of the frame, and at the same time, by operating the hydraulic motor 41 of the screed drive mechanism, the screed plate 36 is finely reciprocated in the front-rear direction. When the concrete leveler 1 is advanced in this state, the screed plate 36 advances while leveling the surface of the poured concrete.
The surface of poured concrete is formed flat. In addition, the height adjustment mechanism 11 of the vertical frames 3a, 3b...
When activated, the heights of the vertical frames 3a, 3b change, so the height of the screed plate 36 can be adjusted to the surface height of the poured concrete.

In addition, when the width of the poured concrete varies depending on the location, for example, when constructing new urban transportation tracks, it is possible to run on the rails 50, 50 with the screws 22 of the fixing means of the horizontal frames 4a, 4b loosened. At the same time, leveling work is performed, and the expandable members 6, 6 are operated according to the width of the poured concrete. In this way, even if the width of the rails 50, 50 laid on the side edges of the poured concrete changes, the distance between the left and right vertical frames 3a, 3b will be adapted to the width of the rails 50a, 50, and derailment will not occur. Moreover, the track on which the traversing bogie 9 runs can be automatically expanded or contracted by changing the lateral overlapping state of the central rail 7 and the moving rails 8, 8. Therefore, even if the width of the poured concrete differs depending on the location, the concrete leveler 1 can continue to run without stopping the leveling work, that is, without stopping the leveling work in the middle.

<Effects of the Invention> As explained above, according to the present invention, the length of the horizontal frame and the interval between the vertical frames can be expanded or contracted as appropriate by operating the drive source and changing the length of the expandable member. . Therefore, there is no need to prepare a spacer that fits the adjustment width each time, and the adjustment width can be adjusted steplessly, whether large or small, and the width can be adjusted to the width that best suits the width of the poured concrete. can do. Furthermore, the horizontal frame can be expanded and contracted by fitting the movable cylinders into the openings at both ends of the fixed cylinder, so even if you adjust the length by expanding and contracting the left and right movable cylinders, the fixed cylinder will remain in the center. This prevents the center of gravity of the device from shifting, and the extension and contraction length of the left and right movable cylinders can be changed as necessary, so it can be positioned to best suit the conditions at the work site. can be set in the state.

Additionally, when the interval between the vertical frames is adjusted, the movable rail whose base end is fixed to each vertical frame side moves together with the vertical frame, and the horizontal overlap length with the center rail changes, thereby changing the length of the track vertically. It can be expanded and contracted depending on the amount of movement of the frame. Therefore, by simply adjusting the interval between the vertical frames, there is no need to separately adjust the track on which the traverse truck runs, and work efficiency on site can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figure 1 shows a state in which the length of the horizontal frame is reduced and the width of the frame is narrowed in the upper half, and a state in which the length of the horizontal frame is expanded and the width of the frame is shown in the upper half. Figure 2 is a side view of the concrete leveler, Figure 3 is a schematic front view of the drive mechanism of the traversing cart with the frame width expanded, Figure 4 The figure is a schematic front view of the drive mechanism of the traversing truck in a state where the width of the frame is narrowed, and FIG. 5 is a perspective view of the drive mechanism of the screed plate. In the diagram, 1 is a concrete leveler, 2 is a wheel, and 3
is a vertical frame, 4 is a horizontal frame, 5 is a horizontal auxiliary frame, 6 is an elastic member, 7 is a central rail, 8 is a moving rail, 9 is a transverse truck, 10 is a screed, 13
is a hydraulic motor for traveling, 14 is a hydraulic motor for width adjustment, 18 is a hydraulic motor for driving a traversing cart, 19
35 is a drive shaft, 35 is a screed frame, 36 is a screed plate, and 41 is a hydraulic motor for driving the screed plate.

Claims (1)

[Claims] 1. A left vertical frame and a right vertical frame having wheels are arranged approximately parallel to each other, and a movable cylinder shorter than the fixed cylinder is expandably fitted into openings at both ends of the fixed cylinder to form a horizontal frame, The tip of one movable cylinder of the horizontal frame is connected to the left vertical frame, the tip of the other movable cylinder is connected to the right vertical frame, and the end of the extensible member that can be expanded and contracted by driving the drive source is placed on the vertical frame side. The central rail, which connects and extends almost parallel to the horizontal frame, is fixed to the fixed cylinder of the horizontal frame, and the left movable rail has its base end fixed to the left vertical frame side, and its base end is fixed to the right frame side. A track is constructed by making the right side moving rail parallel to the center rail, and a screed is installed on a transverse bogie that is movable on the track, and the screed is used to place concrete while the transverse bogie on the track runs back and forth. A concrete leveler characterized by leveling the surface of the concrete.