JPH0710221U - Rotary trowel - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the attachment and detachment of rotating blades that smooth the surface of concrete. [Structure] Mounting arms 13 are radially mounted on a rotating shaft portion of a power source 11 for rotating a rotating blade 12,
A mounting rod 14 that contacts the mounting arm 13 is provided on the upper surface of the rotary blade 12. Through holes 15 and 16 are formed in the mounting arm 13 and the mounting rod 14 so as to coincide with each other, and a rotary blade is formed by a coupling member 19 including a pin 17 inserted into both the through holes 15 and 16 and a retainer 18 thereof. 12 is attached to the mounting arm 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a rotary iron for leveling a concrete surface.

[0002]

[Prior art]

 A rotary iron used for the purpose of smoothing the surface of concrete immediately after pouring while smoothing it to eliminate air bubbles trapped in the concrete is known from Japanese Utility Model Publication No. 62-33863. The invention discloses a rotary iron which is composed of a main body of a leveling machine and a rotary disk which can be attached to and detached from the main body. The variety was limited.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above point, and the problem is to make it possible to easily attach / detach the rotary blade with a pin so that various work can be performed by various rotary blades. .

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention attaches a plurality of mounting arms 13 for mounting the rotary blade 12 to a rotary trowel to a rotating portion of the rotary power source 11 in a radial direction centered on the rotary arm 11 to form a mounting arm 13 and The mounting rods 14 that are in parallel contact with each other are attached to the rotary blades 12, and the mounting arms 13 and the mounting rods 14 are formed with one or more through holes 15 and 16 which are in contact with each other in parallel. The means for attaching the rotary blade 12 by means of a connecting member 19 consisting of a pin 17 inserted through the through holes 15, 16 and a retainer 18 for the pin 17 is provided.

[0005]

【Example】

 FIG. 1 shows an overall view of a rotary iron according to the present invention, in which an internal combustion engine is used as a rotary power source 11, which is installed on a frame 10. The rotating portion 20 that rotates around the vertical axis by the driving force extracted from the rotational power source 11 is set downward, and a plurality of mounting arms 13 are radially provided at the rotating portion 20 at equal intervals. The rotating part 20 is provided on the output shaft of the engine or the reducer shaft.

The mounting arm 13 is composed of three or more (four in the illustrated example) straight members, and a main arm 13 a mounted on the rotating member 20 and an engaging arm 13 b mounted on it are combined. It has a structure (see FIG. 3). A support arm 13c supports the main arm 13a at the base. The lower surface 21 of the main arm 13a and the upper surface 22 of the engaging arm 13b are fastening surfaces of both arms 13a and 13b which are joined and integrated by a bolt 23. The engaging arm 13b has a substantially gate-shaped cross-sectional shape provided with a downward groove-like engaging portion 24.

The rotating blade 12 is a member for contacting the concrete surface with a predetermined surface pressure to perform the leveling work, and is a plate-like member having a substantially rectangular planar shape that is longer in the radial direction than the rotating direction. It is a thing. Reference numeral 12 'is a bending piece, which is provided by slightly bending the front edge of the rotary blade 12 in the rotational direction and both the inner and outer edges of the rotary blade 12 in the radial direction. An attachment rod 14 is integrally attached to the upper surface of the rotary blade 12. The numeral 25 indicates the stopper. The illustrated rod member 14 is provided in the radial direction near the front edge of the rotary blade 12, and is formed in a cross-sectional shape that fits exactly into the engaging portion 24 of the engaging arm 13b (FIG. 4). The attachment rod 14 and the engaging arm 13b have substantially the same length, and the engaging arm 13b is fitted over the entire length without rattling.

Through holes 15 and 16 are formed in the mounting arm 13 and the mounting rod 14, respectively, for connecting them. Both through-holes 15 and 16 are provided at two locations in the radial direction and both ends on the outer side in the direction of rotation, and the coupling member 19 is attached thereto. The coupling member 19 is composed of a pin 17 that is inserted into both the through holes 15 and 16, and a retainer 18 that engages with the head and the tip of the pin 17. The illustrated retainer is a spring-like wire bent in a U shape or a gate shape so as to bypass the upper part of the mounting arm 13, and is pivotally supported at one end in a hole 26 of a pin head and the other. The end is an annular portion 27 that can be locked to the tip of the pin. In the figure, 28 indicates a handle provided with an operator 29 for operating the machine.

In order to use the rotary iron according to the present invention having the above-described structure, the rotary power source 11 is started, the rotary blade 12 is rotated, and the lower surface of the blade 12 is used to clean the concrete surface that has been cast. It's good if you let it go. The plurality of rotating blades 12 rotate to form a disk-shaped rotating surface, and the rotating surface receives the weight of the rotating iron and presses the concrete surface. It is the same as in the prior art that the work is performed while the frame 10 is tilted by operating the handle 29 to move the frame 10 in a desired direction.

As the rotary blade 12 used for the leveling work, three types of finish blades, combination blades and float blades are prepared and can be appropriately replaced and used. Each of the blades has a rotating blade body and an attachment rod 14 provided integrally therewith, and each has several sizes, but the position and the diameter of the through hole 16 are common.

[0011]

[Effect of device]

 Since the present invention is configured and operates as described above, the rotary blade 12 can be attached and detached with one touch, and the rotary blade 12 of a type suitable for the work can be replaced at any time to smoothly and quickly perform the best smoothing work. There is an effect that can be implemented in.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a rotary iron according to the present invention.

FIG. 2 is an enlarged front view of the same blade.

FIG. 3 is an exploded perspective view of a blade mounting portion.

FIG. 4 is an enlarged sectional view of a main part.

Claims (2)

[Scope of utility model registration request] 1. A rotary trowel for leveling a concrete surface with a rotary blade 12 driven by a rotary power source 11, wherein a mounting arm 13 for mounting the rotary blade 12 is provided on a rotary portion of the rotary power source 11. A plurality of mounting rods 14 are mounted in the radial direction centering on the rotating blade 12 and are in contact with the mounting arms 13 in parallel.
Attached to the mounting arm 13 and the mounting rod 14, and the through holes 15 and 16 that are aligned with each other in parallel contact
Alternatively, the rotary trowel is characterized in that the rotary blade 12 is attached by a coupling member 19 formed at two or more places and inserted into both the through holes 15 and 16, and a retaining member 18 for the pin 17. 2. Several kinds of rotating blades 12 having different forms are prepared, and each blade has an attachment rod 14 integrally on its upper surface, and an optional attachment arm 13 is attached to the attachment arm 13 by a connecting member 19. The rotary trowel according to claim 1, which is attached to and used for replacement.