JP2545683B2 - Concrete formwork for forming lifting holes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork capable of simultaneously producing two relatively heavy, substantially kamaboko-shaped concrete blocks.

[0002]

2. Description of the Related Art Conventionally, a concrete formwork 1 of this type is
As shown in FIG. 1, two concrete member forming concave streaks 3 and 3 are provided adjacent to each other so that two substantially kamaboko-shaped concrete blocks 2 and 2 can be manufactured at the same time.

Then, the concrete member forming concave streaks 3 and 3 are filled with concrete mortar, and after curing and solidifying, it is drawn out by a vacuum member or the like to be removed from the mold.

By the way, the concrete formwork 1 having two concrete members can be used more frequently in recent years because a double concrete member can be produced in the same time (curing, solidifying time, etc.) as the single formwork concrete mold. Has been done.

However, it is extremely difficult to manufacture a concrete member with a hoisting hole in the two-cavity concrete formwork 1, and conventionally, no concrete member with a hoisting hole is manufactured in the concrete formwork 1. It was the current situation. That is, in a single-cavity concrete formwork 1, it is relatively easy to insert a pair of insertion support rods from the outside of both side surfaces of the concrete formwork 1 to form lifting holes in both side walls of the concrete block to be manufactured. This is because, as can be seen from FIG. 1, in the individually-molded concrete formwork 1, the insertion support bar cannot be installed in the concrete member forming concave streak portion 3 from the center part of the formwork.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides
The present invention was made in order to solve the above-mentioned conventional problems, and provides a concrete frame for forming a hoisting hole, which is capable of producing a concrete member with a hoisting hole even if it is a concrete formwork with two concrete members. That is the purpose.

[0007]

In order to achieve the above object, the lifting hole forming nklet mold according to the present invention is constructed as follows.

[0008] That is, the crepe forming frame 1 for forming a hoisting hole according to the present invention is a concrete forming frame 1 in which two concrete member forming recessed ridges 3, 3 capable of forming a substantially kamaboko-shaped concrete member are provided side by side. In the concrete member forming recessed ridges 3 and 3, the side walls 11, 11 are concrete member forming recessed ridges 3 and 3, respectively, each of which has a downwardly inclined inclined surface. Is installed in the parts 3 and 3, and the end opening end faces 5 at both ends in the longitudinal direction are provided.
5, a hole forming pipe 4 formed as an ascending slope, and inserted into the concrete member forming concave portions 3 from both side surfaces of the concrete formwork 1 to form the hole forming pipe 4 4, and insertion support rods 9 and 9 for supporting the hole forming pipes 4 and 4, and the hole forming pipes 4 and 4 are provided in the concrete member forming concave ridges 3 and 3. Both end open end surfaces 5 and 5 of the hole forming pipes 4 and 4 are arranged in a substantially horizontal direction in close contact with the inner side surfaces of the downward sloped side walls 11 and 11 of the concrete member forming concave portions 3 and 3. , A pair of insertion support rods 9, 9 inserted from both side surfaces of the concrete formwork 1 are inserted into the hole forming pipes 4, 4 so that the hole forming pipes 4, 4 are cantilevered and supported. ing.

[0009]

In the present invention, the idea of forming a through-type lifting hole in the width direction of the concrete member to be manufactured,
In the past, we succeeded in making a hoisting hole in a two-cavity concrete formwork, which was considered extremely difficult.

That is, in the case of a penetrating hoisting hole, two hoisting hole forming members (hole forming pipes) are taken, and cantilever support from only one outer side of the concrete form is sufficient, and the hoisting hole forming member is inserted at the central portion. This is because it is not necessary to install a supporting rod. Further, in the two-cavity concrete formwork 1, both side walls 11, 11 of the concrete member forming recessed ridges 3, 3 are configured to form inclined surfaces of downward inclination, and the concrete member forming In the hole forming pipes 4 ... Installed in the concave portions 3 and 3, the tip opening end surfaces 5 and 5 on both sides in the longitudinal direction are formed as slopes having an upward slope. Therefore, the hole forming pipes 4, 4
In the concrete member forming concave portions 3, 3, both end open end faces 5 and 5 of the hole forming pipes 4, 4 are downward sloped side walls 1 of the concrete member forming concave portions 3, 3.
1, 11 can be arranged in a substantially horizontal state in close contact with the inner side surface, and a pair of insertion support rods 9, 9 inserted from both side surfaces of the two-piece concrete formwork 1 can be used for forming concrete members. It suffices that the hole forming pipes 4 and 4 are erected in only one side of the hole forming pipes 4 and 4 provided in the recessed lines 3 and 3 so as to support the hole forming pipes 4 and 4 in a cantilevered manner.

[0011]

The present invention will be described below with reference to the preferred embodiments shown in the drawings.

In the drawings, reference numeral 1 indicates a concrete formwork. Further, the concrete formwork 1 is provided with two concrete member-forming concave streaks 3 and 3 adjacent to each other so that two substantially kamaboko-shaped concrete blocks 2 and 2 can be simultaneously manufactured.

Further, reference numeral 4 is a hole forming pipe,
As can be seen from FIG. 1, the two concrete member-forming recessed ridges 3 and 3 are erected so that the width direction thereof is vertically cut in the horizontal direction.

Both end open end surfaces 5 and 5 of the hole forming pipe 4 are in contact with both inner peripheral surfaces of the concrete member forming concave portion 3. That is, the end opening end faces 5 and 5 at both ends in the longitudinal direction of the hole forming pipe 4 are formed as slopes having an upward slope.

Then, in the two-cavity concrete formwork 1, the concrete member forming concave strips 3 and 3 in which the side walls 11, 11 of the concrete member forming concave strips 3 and 3 each have a downward slope. Therefore, the hole forming pipes 4 and 4 are provided in the concrete member forming recessed ridges 3 and 3 so that both end opening end faces 5 and 5 of the hole forming pipes 4 and 4 are used to form the concrete member. The recessed strip portions 3 and 3 are arranged in a substantially horizontal state in a state of being in close contact with the inner side surfaces of the side walls 11 having a downward slope. Reference numeral 6 indicates a substantially disk-shaped anchor attached to the hole forming pipe 4.

Next, a method of attaching the hole forming pipe 4 to the mold 1 will be described. As can be seen from FIG. 1, mounting holes 7 are formed on both outer surfaces of the concrete formwork 1.

Then, the nut-shaped holding members 8 and 8 having a female screw communicating with the mounting hole 7 are attached to the concrete formwork 1.
Install on both sides of.

Next, the insertion support rod 9 shown in FIG. 2 is inserted from the tip end side toward the female screw of the holding member 8 and the tip end portion is projected to the side of the groove 3.

Here, the tip is inserted into the hole forming pipe 4 which is arranged in advance in the groove 3.

The male screw of the insertion support rod 9 is screwed into the female screw of the holding member 8 to fix the protruding state of the insertion support rod 9. With this structure, the hole forming pipe 4 is not likely to be displaced in the mold 1.

From the above state, the concrete mortar is filled in the concave streak portion 3. Then, the concrete block 2 shown in FIG. 3 can be formed by demolding after curing and hardening for a predetermined time.

Since the concrete block 2 has hoisting holes on both sides thereof, as can be understood from FIG. 4, by inserting predetermined hoisting jigs 10 and 10 into the hoisting holes and hoisting them, The concrete block 2 can be quickly and safely transported and moved to a predetermined place without damaging the concrete block 2.

[0023]

The present invention has the above construction. And
With the concrete formwork according to the present invention, even a concrete formwork having two concrete members can manufacture a concrete member with a lifting hole, and thus a concrete member with a lifting hole can be provided at low cost.

[0024]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory view of an insertion support rod.

FIG. 3 is a schematic view of a concrete block manufactured according to this example.

FIG. 4 is a schematic view showing a concrete block in a suspended state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete formwork 2 Concrete block 3 Recesses for concrete member formation 4 Pipe for hole formation 5 Tip opening 6 Anchor 7 Mounting hole 8 Holding member 9 Insertion support rod 10 Lifting jig 11 Side wall

Claims (1)

(57) [Claims] 1. A concrete formwork (1) for producing two concrete products in which two concrete member-forming concave strips (3, 3) capable of forming a substantially kamaboko-shaped concrete member are provided adjacent to each other, wherein the concrete is The member forming recessed ridges (3, 3) are concrete member forming recessed ridges (3, 3) in which both side walls (11, 11) each have a downwardly inclined inclined surface. A hole-forming pipe (4 ...) that is erected in the recessed line portions (3, 3), and that the end opening end faces (5, 5) on both sides in the longitudinal direction are formed as upward slopes.
And the concrete forming frame (1) is inserted into the concrete member forming concave streak portions (3, 3) from both side surfaces thereof, and is inserted into the hole forming pipes (4, 4). The hole forming pipes (4, 4) are provided with insertion support rods (9, 9) for supporting the hole forming pipes (4, 4). Both end opening end faces (5, 5) of (4, 4) are downwardly inclined both side walls (11, 1) of the concrete member forming concave portion (3, 3).
1) A pair of insertion support rods (9, 9), which are arranged in a substantially horizontal state in close contact with the inner side surface and are inserted from both side surfaces of the concrete formwork (1), are connected to the hole forming pipe (4,
4) A concrete formwork for forming a hoisting hole, which is inserted into the inside of the hoist to support the hole forming pipes (4, 4) in a cantilevered manner.