JPH0583202U - Concrete leveling equipment - Google Patents

Abstract

(57) [Summary] [Purpose] For the traveling direction of the concrete leveling device,
To be able to perform leveling work accurately in either the left or right direction. [Structure] A pair of screw rotating shafts 31 and 32, which are symmetric with respect to the screw spiral direction, are provided in parallel. The supporting plate 21 of the screw rotating shaft is hung so as to be swingable in a direction perpendicular to the axial direction, and one of the pair of screw rotating shafts 31 and 32 is grounded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete leveling device for performing a flat finish of a floor immediately after placing concrete on the floor in concrete construction.

[0002]

[Prior Art]

 Conventionally, after pouring fresh concrete, the concrete surface is leveled with tools such as dragonflies and trowels while compacting the pouring concrete using a vibrator. This work was performed by skilled workers, and required a great deal of labor and time.

On the other hand, it has been proposed to mechanize the leveling work, and for example, the one disclosed in Japanese Patent Publication No. 3-29946 is known. In this structure, traveling wheels are provided at the corners of an L-shaped frame in plan view, and the traveling wheels are provided at one side of the frame. Then, a rotary screw type leveling mechanism is attached to the traveling rail at a substantially right angle and substantially horizontally to the floor surface.

[0004]

[Problems to be solved by the device]

 The apparatus described in Japanese Patent Publication No. 3-29946 carries out leveling after pouring concrete and leveling work is performed by reciprocating the screw while moving the screw along the traveling rail. However, since the screw rotates only in one direction and is leveled only in one direction with respect to the traveling direction of the screw shaft, unevenness in leveling occurs.

[0007] Therefore, there arises a technical problem to be solved in order to carry out the leveling operation with high accuracy by scraping the device to the left or right with respect to the traveling direction of the device, and the present invention solves this problem. The purpose is to

[0006]

[Means for Solving the Problems] The present invention has been proposed in order to achieve the above-mentioned object, in which a screw supported substantially horizontally is provided, and the rotation of the screw smoothes the surface of the placed concrete. In a concrete leveling device, a pair of screw rotating shafts having screw spiral directions symmetrical to each other are provided in parallel, and a supporting plate of the screw rotating shafts is swingably mounted on the machine body in a direction perpendicular to the axial direction. The present invention provides a concrete leveling device, which is hung so that one of a pair of screw rotating shafts can be grounded.

[0007]

[Action]

 A pair of screw rotating shafts in which the spiral directions of the screws are symmetrical are attached to a support plate, and the support plate is swingable in a direction perpendicular to the axial direction with respect to the machine body. Therefore, if the support plate is tilted with, for example, a wire or a rod, one of the pair of screw rotation shafts is grounded. If the screw rotating shaft that is grounded in this state is driven, the surface of the concrete is leveled in either the left or right direction. Next, if the support plate is tilted to the opposite side and the other screw rotation shaft is grounded, the spiral direction is different and the surface of the concrete is leveled in the other direction.

Therefore, by swinging the support plate, any one of a pair of screw rotating shafts having different spiral directions can be arbitrarily used to move the supporting plate in either the left or right direction with respect to the traveling direction of the device. The leveling work can be performed with high accuracy.

[0009]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a concrete leveling device, in which a generator 11 with an engine and a control device (not shown) are mounted on the machine body 11 and provided with a speed reducer for traveling provided under the machine body 11. The left and right drive wheels 13, 13 are driven by the motors 12, 12 to move the machine body 11 forward or backward. Castor wheels 14 are provided at the rear of the machine body 11 to facilitate the turning of the machine body 11.

A support frame 15 is projected from the front of the machine body 11, and a vertically movable U-shaped mast 16, 16 and a lifting control cylinder 17 hold a hanging frame 18 having a U-shape in plan view. To support. A fixing mast 19 is erected at the center of the suspension frame 18, a level sensor 20 is provided at an upper position thereof, and a laser emitted from a laser emitting device (not shown) is received by the level sensor 20. The heights of the support plate 21 for the screw rotating shaft and the suspension frame 18, which will be described later, are detected and sent to the control device. Further, inclinometers 22 and 22 are provided on both right and left sides of the fixing mast 19 to detect the levelness of the suspension frame 18 and the support plate 21 and send them to the control device. Based on the detected values, the height and inclination of the concrete surface after placing are measured, and the lifting control cylinder 17, the rolling control cylinder 23 for inclination correction, and the pitching control are performed so as to match the reference values. The operating cylinder 24 is operated to maintain the support plate 21 in a horizontal state and at a predetermined height. Further, a vibrator 25 and a flat plate 26 are supported on the front part of the support plate 21 by arms 27, 27 projecting forward of the suspension frame 18.

Further, a bracket 28 is provided between the arms 27, 27 of the suspension frame 18 so as to project vertically, and a screw conversion cylinder 29 is hung vertically. The tip end of the rod of the cylinder 29 is the central portion of the support plate 21. It is connected to the bracket 30 fixed to the. A motor 33 with a reduction gear that drives the screw rotating shafts 31 and 32 is fixed to one end of the support plate 21.

Here, the screw rotating shafts 31 and 32 are formed symmetrically in the screw spiral direction, and both ends of each of the pair of screw rotating shafts 31 and 32 have support arms 34, 34 of the support plate 21 and It is pivotally supported by 35,35. Then, the sprockets 36 and 37 are fitted by projecting one end portions of the pair of screw rotation shafts 31 and 32 from the one support arm 34, 34 side. Further, a sprocket 38 is fitted to the motor 33 with a speed reducer, and a chain 39 is wound between the sprocket 36, 37, 38 so that the power of the motor 33 with a speed reducer is supplied to the pair of screw rotating shafts 31. And transmitted to 32.

As shown in FIG. 2, when the cylinder 29 for screw conversion is extended, the support plate 21 is pressed downward and swings backward as shown by the chain double-dashed line. The screw of the rotary shaft 31 is grounded. While advancing the machine body 11 in such a state, the leveling work of the concrete surface immediately after placing is carried out. On the other hand, when the screw conversion cylinder 29 is contracted, the support plate 21 is pulled up and swings forward as shown by the chain double-dashed line in FIG. 3, and the screw of the other screw rotation shaft 32 is grounded. Therefore, by extending or contracting the screw conversion cylinder 29, either one of the pair of screw rotation shafts 31 and 32 can be arbitrarily selected, and the screw rotation cylinder 31 can be moved in either the left or right direction with respect to the traveling direction of the machine body 11. It is possible to perform leveling work.

The present invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention extends to the modified version.

[0015]

[Effect of the device]

 Since the present invention is configured as described in detail in the above one embodiment, it is possible to arbitrarily select one of the pair of screw rotating shafts whose spiral directions are symmetrical to be grounded. Therefore, the spiral direction of the screw blades can be changed from one direction to the other in a very simple and quick manner, and the leveling work of the concrete surface after pouring can be performed with high accuracy in the left and right directions.

[0016] Thus, the present invention is a device having a truly practical value such that the work precision of the leveling work can be increased and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a concrete leveling apparatus according to an embodiment of the present invention.

FIG. 2 is a right side view showing an operating state of the concrete leveling device.

FIG. 3 is a right side view showing an operating state of the concrete leveling device.

[Explanation of symbols]

 11 Airframe 18 Suspended Frame 21 Support Plate 29 Screw Conversion Cylinder 31, 32 Screw Rotation Shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Sakamoto 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Tokyo Head Office

Claims (1)

[Scope of utility model registration request] 1. A screw, which is supported substantially horizontally, is provided.
In a concrete leveling device for leveling a concrete surface that has been placed by the rotation of the screw, a pair of screw rotating shafts in which the spiral directions of the screws are symmetrical are provided in parallel, and a supporting plate of the screw rotating shaft is used as an axis. A concrete leveling device, characterized in that the concrete leveling device is suspended from a machine body in a direction perpendicular to the direction and is formed so that either one of a pair of screw rotating shafts can be grounded.