JP2003129663A - Concrete aggregate settler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aggregate settler allowing an operator using it to surely settle aggregate to a desired depth from the top surface of concrete to achieve uniform settlement of the aggregate. SOLUTION: The concrete aggregate settler comprises a float board 1 with a handle 3 provided on the upper surface thereof, and a number of hanging needle-like protrusions 2 aligned on the lower surface of the float board 1. When the needle-like protrusions 2 are sunk into concrete until the lower surface of the float board 1 makes contact with the top surface of the concrete, the aggregate in the concrete can be settled by the length of the protrusion 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete aggregate sunk tool for sinking the concrete aggregate that has been cast to secure a leveling margin and a shrinkage margin of the concrete during curing.

[0002]

2. Description of the Related Art When cast concrete, aggregate is sunk from the top surface to a certain depth and cured. This is aimed at securing a leveling allowance for the concrete due to the flattening of the top surface and a shrinkage allowance for the concrete during curing. Examples of such aggregate sunk tools include Kaikaihei No. 05-006011 "Jet surface processing jig" and Utility Model Registration No. 3055025 "Concrete finishing trowel".

Japanese Utility Model Laid-Open No. 05-006011 discloses a method of forming a groove without floating the aggregate at the seam when forming unevenness on the surface of the seam of the concrete joint and the mortar joint. It is a technology related to ingredients. Further, Utility Model Registration No. 3055025 is a technology related to a trowel in which a large number of through holes smaller than the size of aggregate such as gravel are arranged in a trowel plate body. This technology is wider than the actual Kaihei No. 05-006011 and is a technology specialized for directly sinking aggregate.

[0004]

From the viewpoint of sinking the aggregate to a certain depth on the top surface of the cast concrete,
The above utility model registration No. 3055025 is preferable. Here, in order to sink the aggregate, it is necessary to have a structure in which concrete can be excluded even if pressure can be applied to the aggregate from above, and in utility model registration No. 3055025, the structure is a mesh trowel made of through holes. It is realized with a board. That is, the connecting bars that make up the mesh push the concrete away and sink into the concrete, but when the mortar plate is pulled up, the concrete flows again into the area where the connecting bars had been pushed away, and the aggregate is removed without unnecessary concrete removal. It can be settled.

However, aggregates come in various sizes, and when the size of the through holes is determined in consideration of all of them, there is a problem that the eyes become too fine. Also, if the connecting bars that make up the mesh are too thick, concrete will be eliminated,
On the contrary, if it is too thin, it may be pushed back by the aggregate and deformed. Even if the mesh is not deformed, the mesh has a large resistance to concrete and it is difficult to settle the aggregate deeply. If the aggregate sedimentation is shallow, the aggregate may be seen through the top surface after curing depending on the leveling of the top surface, resulting in a problem that the top surface height cannot be adjusted, such as requiring overcoating.

Further, when an operator holds the grip handle and applies pressure to the trowel plate main body, the pressure cannot be applied uniformly,
There is also a problem that the mesh problem is unevenly distributed and uniform sedimentation of the aggregate cannot be realized over the entire top surface. Therefore, in order to develop an aggregate submersion tool that can surely settle the aggregate in place of the mesh-shaped mortarboard body and can realize the uniform settling of the aggregate while being used by the operator.

[0007]

What has been developed as a result of the study is a concrete aggregate sunk tool in which a grip handle is provided on the upper surface of the mortar board and a large number of needle-like projections are provided side by side on the lower surface of the mortar board. The aggregate submersion tool of the present invention may be the same as the leveling tool for the concrete top surface that is conventionally found with respect to the trowel plate and the grip handle, but is characterized in that a large number of needle-like protrusions are provided side by side on the lower surface of the mortar plate. is there. That is, the aggregate is not sunk by the net-like mortarboard body, but the aggregate is sunk by the needle-shaped protrusions. Therefore, the trowel board itself may be formed of a flat surface material that excludes concrete. Rather, it is preferable that the trowel plate is made of a face material so that the strength against the reaction force when the aggregate is sunk can be obtained. In this case, the mortarboard is in contact with the top surface of the concrete, and the depth at which the needle-like protrusions are recessed from the top surface of the concrete is regulated. As a result, the depth at which the aggregate is submerged is the length of the needle-shaped protrusion from the lower surface of the mortar plate to the tip of the needle-shaped protrusion.

As described above, the feature of the present invention resides in the needle-like projections, but a certain thickness is required because pressure is applied to the aggregate. It is desirable that the specific needle-shaped protrusion has a diameter of 1 to 4 mm. The diameter is more preferably 2 to 3 mm, and the diameter may be arbitrarily determined depending on the material used. Further, the length of the needle-like protrusions, which is the depth to sink the aggregate, is 15 to 45 mm, preferably 20 to 40 mm. From this, if the spacing between the needle-shaped protrusions is too wide, the aggregate may be fitted between the needle-shaped protrusions and may not come off. Therefore, a large number of needle-like protrusions are arranged in parallel at intervals of 4 to 6 mm. Even if the number of needle-like projections is large, each is only a point, so even if the needle-like projections are immersed in the top surface of the concrete, the concrete is not removed and the shape of the top surface is not greatly destroyed (finishing). (The top surface is leveled separately). Preferably, a large number of needle-shaped protrusions are arranged in parallel at intervals of about 5 mm.

In the aggregate submersion tool of the present invention, the needle-like projection is depressed from the top surface so that an operator can hold the handle and press the mortar plate against the top surface of the concrete, and the aggregate is pressed by the tip of the needle-like projection. Attach and sink. As described above, by using a strong flat surface material and a needle-shaped projection with a large diameter, it is possible to press down the aggregate material without losing the reaction force, but in reality, the trowel plate is centered around the grip handle. It may happen that it is difficult to evenly sink the aggregate due to tilting. Therefore, it is preferable that the trowel plate is provided with a vibrator part and vibrates integrally with the vibrator part. The vibration by the vibrator portion is preferably in the vertical direction, but basically, the operator holds the handle and presses it downward, so that the vibration direction does not have to be particularly determined. Further, it is preferable that the vibration width is large and smaller, and the amplitude is about several mm. Such vibration of the vibrator portion causes the needle-like projections on the lower surface of the mortar plate to be moved in small steps, and the aggregate is appropriately pushed down. The vibrator portion is preferably electrically driven and may be an external power source, but a battery may be mounted together on the trowel plate.
Since the vibration caused by the vibrator portion may be small, a vibration means used in a mobile phone can be used as the vibration mechanism.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of an aggregate sinker to which the present invention is applied, FIG. 2 is a partially cutaway plan view of the aggregate sinker, FIG. 3 is a side view of the aggregate sinker, and FIG. FIG. 5 is a perspective view of the aggregate submersion tool seen from above, FIG. 5 is a perspective view of the same aggregate submersion tool seen from below, and FIG. 6 is a partially enlarged side view showing the usage state of the aggregate submersion tool. is there. As is clear from the respective drawings, the aggregate submersion tool of this example has a left-right and front-back symmetrical appearance in a plan view. In this way, the aggregate submersion tool of this example is similar to the leveling tool (or leveling iron) that has been conventionally seen, except for the needle-like projections 2 arranged in parallel on the lower surface of the trowel plate 1, and therefore the handling is also the same as the above. Same as leveling equipment.

In the aggregate submersion tool of this example, a synthetic resin grip 3 is provided on the upper surface of a trowel plate 1 and a large number of metal needle-like projections 2 are provided on the lower surface thereof. As shown in FIGS. 1, 2 and 3, the trowel plate 1 is made of a flat metal plate having a width of 100 mm, a length of 300 mm and a thickness of 4 mm. The plate material may be the same material as a conventional leveling tool or the like, and may be made of, for example, a synthetic resin (see various synthetic resins exemplified in the grip handle below), but with strength, weather resistance and rust resistance, It is preferably made of metal to obtain a suitable weight for sinking the aggregate. In this case, the weight is 300 to 340 g if made of aluminum or aluminum alloy, 930 to 980 g if made of steel or stainless steel, and 520 to 570 g if made of titanium or titanium alloy.

The grip handle 3 is a handle body 4 having a diameter of 20 mm × 100 mm.
It is a structure in which the both ends are supported by a substantially cone-shaped mounting portion 5 having a height of 50 mm. As the material of the grip handle 3, metal, wood, synthetic resin (plastic), etc. may be used alone or in combination, but unlike the mortarboard 1, relatively lightweight wood or synthetic resin is preferable. Further, although wood is preferable in view of ease of gripping, synthetic resin is preferable in view of productivity, which can be integrally formed with the attachment portion. The type of the synthetic resin is not limited, and examples thereof include polyolefin resin, polyamide resin, polyester resin, polyvinyl chloride resin, polystyrene resin, and phenol resin. The weight of the grip handle 3 when the handle body 4 and the mounting portions 5, 5 are integrally molded using these synthetic resins is 70 to 100 g. In this example, FIG.
As can be seen from FIG. 3, the mounting portion 5 is fitted into the female screw fitting projection 6 on the upper surface of the trowel plate 1, and the grip handle 3 is attached by the screw 7 so as to be integrated with the trowel plate 1. Although illustration is omitted,
Regardless of the number of grip handles, a plurality of grip handles may be provided basically.

Each of the needle-shaped protrusions 2 has a length of 25 mm and a diameter of 2 mm.
The needle is made of metal and has a rounded tip. This needle-shaped protrusion 2
As shown in Fig. 5, at 5mm intervals (center axis line intervals)
20 (width direction) × 60 (length direction) hangs and is juxtaposed on the lower surface of the mortarboard 1. The material of the needle-like protrusions 2 is also free, for example a hard synthetic resin (see the various synthetic resins exemplified in the above grip handle).
Although it can also be used, in practice, a metal can be preferably used from the viewpoint of required strength, weather resistance and rust resistance. For example, the same kind of metal as that of the mortarboard 1 is used, and the needle-like protrusions 2 of this example are used.
In the case of configuring, the total weight of all needle-shaped protrusions 2 is 235 to 265 g if made of aluminum or aluminum alloy, 730 to 770 g if made of steel or stainless steel, and 400 to 450 g if made of titanium or titanium alloy. Become. From the above, the aggregate submersion tool of this example can be constructed in a total weight range of 600 to 1750 g.

As shown in FIG. 1, the aggregate submersion tool of this example is such that the operator grips the handle body 4 of the handle 3 with his / her hand 8 and the needle-shaped projection 2 is directed downwards. By pressing it against the top surface 10 and immersing the needle-shaped protrusions 2 in the concrete 9 as seen in FIG. 6, the aggregate 11 is pushed down by the tips of the needle-shaped protrusions 2. When the aggregate 11 is pushed down, the concrete 9 is removed to the extent that the needle-like protrusions 2 that have been submerged in the concrete 9 are removed, but as soon as the needle-like protrusions 2 are pulled out, the surrounding concrete 9 is immediately removed. And the holes corresponding to the needle-shaped projections 2 do not open on the top surface 10 of the concrete 9 in appearance. Since the needle-like protrusions 2 are restricted from entering by contacting the mortar plate 1 with the top surface 10 of the concrete 9, the aggregate 11 pushed by the tips of the needle-like protrusions 2 is from the lower surface of the mortar plate 1 to the tip of the needle-like protrusions. Up to the bottom, that is, the length of the needle-shaped projection 2, is sunk from the top surface 10. After the aggregate 11 has settled down, the top surface 10 is separately flattened by a leveling tool.

FIG. 7 is a perspective view of a vibrating aggregate submerging device in which an electric vibrator portion 12 is integrally provided on the trowel plate 1 as viewed from above. As described above, the aggregate submersion tool of the present invention is basically held by an operator, and the needle-like projection is immersed in concrete according to the force of the operator, so that the needle-like projection tip Push down the aggregate. However, aggregates vary in size and shape, and it is difficult to apply uniform pressure and evenly settle. The vibrating aggregate sinker of this example vibrates the entire trowel plate 1 by the electric vibrator portion 12 integrally provided on the trowel plate 1, and disperses the pressure by the operator's hand to the entire trowel plate 1 while vibrating. The acicular projections 2 are pressed against the aggregate from multiple directions to push down the aggregate of aggregate.

The electric vibrator portion 12 shown in this example is similar to the mechanism for providing the vibrator function of a mobile phone, and has a structure in which a vibration mechanism having an eccentric weight attached to the rotating shaft of a DC motor and a DC battery are provided together. It is not necessary to supply power from the outside (not shown). Since the trowel plate 1 vibrates integrally with the electric vibrator portion 12, the vibration may affect the grip of the grip handle by the operator's hand. Therefore, in the grip handle 3 of this example, a metal support shaft 14 is similarly installed on the upper ends of the metal mounting portions 13 and 13 projecting from the electric vibrator portion 12, and a wooden cylindrical handle 15 is loosely fitted to the support shaft 14. ing. Since the cylindrical handle 15 is in a free state with respect to the support shaft 14, even if the trowel plate 1 vibrates, an operator can hold the cylindrical handle 15 without loosening his or her hand.

FIG. 8 is a perspective view showing an example in which an interposition plate 17 for adjusting the length of the needle-like projections 16 of the aggregate submersion tool is used. The aggregate submersion tool of the present invention has a function of contacting the mortar plate with the top surface and restricting the entire aggregate submersion tool from being further buried in concrete. Therefore, if the worker always uses the aggregate submersion tool so that the mortar plate is pressed against the top surface, the aggregate can be evenly settled according to the length of the needle-shaped projections. However, when it is desired to sink the aggregate more shallowly, the needle-like projections have to be immersed in the concrete without floating the mortarboard against the top surface of the concrete, which greatly impairs workability. Also, if you want to sunk the aggregate deeper, there is a problem that the mortar board interferes. Therefore, as shown in FIG. 8, needle-like protrusions 16 that are longer than the settling amount of aggregate that is normally required are provided in parallel on the lower surface of the mortar plate 1, and through holes 18 are arranged in the same arrangement as the needle-like protrusions 16. It is advisable to insert the required number of plates 17 so that the length of the needle-like projections 16 protruding from the lower surface of the lowermost interposition plate 17 = the length substantially immersed in concrete can be adjusted. The trowel plate 1 and the interposing plate 17 and the interposing plates 17 and 17 are fitted with fitting male and female portions 19 and 20 provided at both ends to ensure the integrity during use. Interposer 1
Since 7 is more preferable as it is lighter in weight, it is preferable to use a synthetic resin plate (see various synthetic resins exemplified in the above grip handle). Although not shown in the figure, this interposer plate is the vibrating aggregate sinker (see FIG. 7).
Also available for.

FIG. 9 is a perspective view of an aggregate sinker in which a leveling plate 22 is attached to a large trowel plate 21 and a long grip handle 23 is tiltably attached. The aggregate submersion tool of the present invention can be of any size.
In each of the above-mentioned examples, the size of the trowel plate is limited due to the fact that the worker holds it in his / her hand, and the work time increases when the sedimentation of the aggregate is attempted in a wide range. Therefore, as shown in FIG. 9, the large trowel plate 21 is used to allow the aggregate to settle in a wide range at once. Further, in this example, a leveling plate 22 is removably attached to the trowel plate 21, and a grip handle 23 for handling the trowel plate 21 is elongated and is pivotally attached to the trowel plate 21 in a tiltable manner. As a result, the worker stands up a little away from the top surface of the concrete, while the aggregate is sunk by the needle-like projections 2 on the lower surface of the mortarboard 21, and at the same time the top surface is smoothed by the leveling plate 22. You can Although illustration is omitted, in the aggregate submersion tool of this example,
A vibrator portion may be attached to the trowel plate.

[0019]

The aggregate sinker of the present invention makes it possible to easily sink the aggregate to a certain depth on the top surface of the cast concrete. This is substantially useful as compared with a conventional jig or the like in that it can surely sink the aggregate to a desired depth. Moreover,
The structure is extremely simple and the production cost can be reduced, but the appearance and weight are not much different from the conventional one-handed leveling tool, etc., and it can be held and handled by the operator. There is.

Further, uniform sedimentation of the aggregate can be easily realized by a vibrator portion attached to the trowel plate and vibrating integrally with the trowel plate. The operator holds the aggregate submersion tool in his hand, and if the vibrator is operated while lightly pressing it against the top surface of concrete, the aggregate will settle evenly within the range of the mortarboard due to vibration. . If the same work is sequentially performed on the entire top surface, uniform settling of aggregate on the entire top surface can be realized. This is an extremely intuitive operation, is easy for the operator to understand, and has the effect of reducing the labor of the operator.

[Brief description of drawings]

FIG. 1 is a front view of an aggregate submersion tool to which the present invention is applied.

FIG. 2 is a partially cutaway plan view of the aggregate submersion tool.

FIG. 3 is a side view of the aggregate submersion tool.

FIG. 4 is a perspective view of the aggregate submersion tool showing a member assembly relationship as seen from above.

FIG. 5 is a perspective view of the aggregate submersion tool as viewed from below.

FIG. 6 is a partially enlarged side view showing a usage state of the aggregate submersion tool.

FIG. 7 is a perspective view of a vibrating aggregate sunk tool in which an electric vibrator part is integrally provided on a trowel plate as viewed from above.

FIG. 8 is a perspective view of an example in which an interposer plate that adjusts the length of the needle-like protrusions of the aggregate submersion tool is used.

FIG. 9 is a perspective view of an aggregate sinker in which a large trowel plate is provided with a leveling plate and a long grip handle is tiltably attached.

[Explanation of symbols]

1 mortarboard 2 needle-shaped protrusions 3 hand grip 9 concrete 10 Top 11 aggregate 12 Electric vibrator part 16 Needles 17 Interposer plate 18 through hole 21 large mortarboard 22 Leveling plate 23 Long grip handle

Claims (3)

[Claims] 1. A concrete aggregate sunk tool in which a grip handle is provided on the upper surface of a mortarboard, and a large number of needle-like projections are provided side by side on the lower surface of the mortarboard. 2. The concrete aggregate sinker according to claim 1, wherein the trowel plate is a flat face material. 3. The concrete aggregate sinker according to claim 1, wherein the trowel plate is provided with a vibrator portion so that the mortar plate vibrates integrally with the vibrator portion.