JP2011083924A - Core member for concrete block molding form, concrete block molding form having the core member, and method for manufacturing concrete block using the core member and the form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently produce a concrete block having a through hole by an instant demolding method. <P>SOLUTION: An inner wall surface body 22 which constitutes part of the inner wall surface of the through hole 14, an inner wall surface block 23 which can move to be contacted/separated with/from the inner wall surface body 22 and constitutes the other part of the inner wall surface of the through hole 14 by part of an outer wall surface, a bias member 25 which biases the inner wall surface block 23 in the direction to approach the inner wall surface body 22, and a rod RD which makes the inner wall surface block 23 separate from the inner wall surface body 22 against bias force by the bias member 25 by making it inserted into a form 40 from the outside of the form 40 and pressing the inner wall surface block 23 by a peripheral surface are provided. In the form 40 and part of the wall surface of the inner wall surface body 22, in the direction perpendicular to the depth direction of the through hole 14 to be formed on the form 40, a notch part 24 into which the rod RD can be inserted is formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a core member for a concrete block forming mold, a concrete block forming mold having the core member, and a method for producing a concrete block using the same.

  As a manufacturing method of the concrete block which has a through-hole by an immediate demolding system, there exist some which are described in patent documents 1, for example. According to the method for producing a concrete block described in Patent Document 1, a concrete block having a through hole can be suitably formed even in the immediate demolding method.

Japanese Patent Publication No. 6-2331

  In the method for manufacturing a concrete block disclosed in Patent Document 1, a rod-shaped core for forming an insertion hole is erected on the bottom plate of the concrete block. Since this rod-shaped core is placed at the same position from the time the concrete material is put into the mold until it is demolded, it may be in close contact with the concrete material during demolding, making it difficult to pull out the rod-shaped core. There is.

Moreover, in patent document 1, only the structure of the rod-shaped core standingly arranged in the direction orthogonal to a baseplate surface is demonstrated.
When a concrete structure is constructed by connecting a plurality of concrete blocks, the concrete blocks may be connected in various arrangements. For example, when building a revetment by stacking concrete blocks, the concrete blocks are often stacked in a state of being inclined with respect to the water surface (a state along a slope leading to a riverbed). In such a case, it is necessary to form the axis of the insertion hole to be formed in the concrete block so as to be parallel to the slope where the concrete blocks are stacked. However, even if the insertion hole extending in a state inclined in the height direction of the concrete block as described above has the method described in Patent Document 1, the immediate demolding method cannot be applied and is efficient. There is a problem that the concrete block cannot be manufactured.

  Then, this invention aims at manufacturing efficiently the concrete block which has a through-hole for inserting the tension material for connecting several concrete blocks with an immediate demolding method.

In order to achieve the above object, the present invention has the following configuration.
That is, when manufacturing a concrete block by immediate demolding, a core member for forming a through hole extending in the height direction of the concrete block by being disposed in a mold, An inner wall surface body constituting a part of the wall surface, an inner wall surface block which is movable toward and away from the inner wall surface body and constitutes the other part of the inner wall surface of the through hole by a part of the outer wall surface, and the inner wall surface block An urging member that urges the inner wall body in a direction approaching the inner wall body, and an urging member that urges the inner wall surface block from the outside of the mold frame and presses the inner wall block by an outer peripheral surface. A rod for separating the inner wall block from the inner wall body against a force, and a depth of a through-hole to be formed in the mold is formed in a part of the wall of the mold and the inner wall body. Orthogonal to the vertical direction Direction, the rod is a core member for a concrete block molding frame, characterized in that the cut-out portion capable insertion is formed.

  Moreover, as another invention, it has a top plate connected to a drive mechanism, and a side wall body that is disposed on the top plate and is separable from the top plate, and the side wall body has opposing side wall portions. A communication portion that communicates between the outer wall surface and the inner wall side of the concrete block molding formwork core member is formed in the space formed by the top plate and the side wall body. Further, the invention may be an invention of a concrete block molding formwork characterized in that the notch portions are arranged in alignment.

  Further, as another invention, a step of forming the above-described concrete block forming mold, and a notch formed in the core member for the concrete block forming mold from a communicating portion formed on a side wall of the concrete block forming mold A space for molding the concrete block is formed in the concrete block molding form by inserting a rod toward the inner wall and separating the inner wall block from the inner position to the outer position against the biasing force. A step of putting concrete material into the molding space, a step of compacting the concrete material in the concrete block forming mold, and inserting and removing the rod from the cutout portion and the communication portion, respectively. The inner wall surface block located outside the plane region of the inner wall surface body is replaced with the inner wall surface body. A step of returning to the plane region by an urging force, a step of separating the core member for forming the concrete block forming mold and the side wall body from the pedestal, and a step of removing the concrete block formed in the molding space. It can also be set as the invention of the manufacturing method of the concrete block characterized by having.

  According to the core member for concrete block forming mold and the concrete block forming mold according to the present invention, and the concrete block manufacturing method using these, the insertion hole extending in the direction inclined in the height direction of the concrete block is provided. Even concrete blocks to be manufactured can be efficiently manufactured by an immediate demolding method.

It is a front view of the concrete block manufactured in this embodiment. It is a top view of the concrete block manufactured in this embodiment. It is sectional drawing in the AA in FIG. It is a side view of the core member for concrete block forming molds in this embodiment. It is a bottom view of the core member for concrete block forming molds in this embodiment. It is a side view which shows the state which inserted the rod in the core member for concrete block shaping | molding forms shown in FIG. It is a side view of the concrete block molding form in this embodiment. It is a top view of the concrete block molding formwork in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment. It is explanatory drawing which shows the state in each process at the time of shape | molding the concrete block in this embodiment.

  Hereinafter, a concrete block forming mold core member according to the present invention, a concrete block forming mold provided with the core member, and a method of manufacturing a concrete block using these will be described based on embodiments. FIG. 1 is a front view of a concrete block manufactured in the present embodiment. FIG. 2 is a plan view of a concrete block manufactured in the present embodiment. 3 is a cross-sectional view taken along line AA in FIG. In this embodiment, the concrete block used for the revetment will be described.

(Concrete block)
The concrete block 10 in the present embodiment is suitable for use in a revetment, and has a staircase shape while a tension material extended along the slope from the position near the slope on the slope of the river is inserted into the through hole. Are stacked and integrated in the stacking direction.
As shown in FIG. 1, the concrete block 10 has a river side wall surface 11, a slope side wall surface 12, and a connecting portion 13 that connects the river side wall surface 11 and the slope side wall surface 12. Since the river side wall surface 11 is a portion that can be visually recognized after the revetment is constructed, it is decorated with a pattern and the like. On the other hand, the slope side wall surface 12 is formed smaller in width than the river side wall surface 11. The slope side wall surface 12 of the concrete block 10 in this embodiment is not decorated because it is a part that will not be visually recognized in the future.

The connecting portion 13 extends in a direction parallel to the slope on which the concrete block 10 is installed (extends in the height direction of the concrete block 10 while being inclined with respect to the installation surface of the concrete block 10). 14 is formed. The through-hole 14 formed in the concrete block 10 in the present embodiment is formed in a substantially rectangular shape with a plan view shape having an arcuate portion at a corner. In the internal space of the through-hole 14, when the concrete block 10 is piled up, a reinforcing bar which is a tension material is disposed together with crushed stone. The filling amount of the crushed stone and the length of the reinforcing bar disposed in the through hole 14 can be appropriately set according to the stacked height of the concrete block 10. A recess 15 extending in the direction parallel to the river side wall surface 11 is formed on the upper surface of the connecting portion 13.
The shapes of the through hole 14 and the recess 15 in the present embodiment are merely examples, and the shapes of the through hole 14 and the recess 15 are not limited to the shapes shown in the present embodiment.

(Core material for concrete block molding formwork)
Next, a core member suitable for use in forming the concrete block shown in FIG. 1 by an immediate demolding method will be described. FIG. 4 is a side view of the core member for the concrete block forming mold in the present embodiment. FIG. 5 is a bottom view of the core member for the concrete block forming mold in this embodiment.
Hereinafter, the core member for the concrete block molding form may be simply referred to as a core member. The core member 20 is housed in a concrete block manufacturing form and is used to form the concrete block 10 having the through holes 14. In addition, in this embodiment, the core member formed in the state which turned the concrete block 10 of the state shown in FIG. 3 upside down is demonstrated.

  The core member 20 in the present embodiment includes a top plate 21, an inner wall surface body 22 formed so as to be integrated with the top plate 21 by welding or the like, and an inner wall surface block 23 that is movable in and out of the planar area of the top plate 21. have. The inner wall surface 22 constituting three surfaces of the inner wall surface of the through hole 14 is formed in a substantially U shape as shown in FIG. On the surfaces 22A and 22B forming both end edges of the inner wall surface body 22 formed in a U-shape, a notch 24 for forming the concave portion 15 of the concrete block 10 shown in the cross-sectional view of FIG. 3 is formed. .

  The inner wall surface block 23 includes an inner wall surface constituting surface 23A constituting a part of the inner wall surface of the through-hole 14 together with the inner wall surface body 22, and a rod abutting surface 23B facing the inner wall surface constituting surface 23A and contacting a rod described later. have. Further, in the inner wall surface body 22, the inner wall surface constituting surface 23 </ b> A and the wall surface 22 </ b> C at a position facing the inner wall surface forming surface 23 </ b> C are formed in parallel to each other.

  In the inner space of the core member 20, urging members 25 having both end edges connected to the inner wall surface body 22 and the inner wall surface block 23 are disposed. The inner wall surface block 23 is urged in a direction approaching the inner wall surface body 22 by the urging force of the urging member 25. The biasing member 25 in this embodiment is a helical spring. The helical spring as the urging member 25 is formed in such a length dimension that the urging force does not act on the inner wall surface block 23 in a state where the entire inner wall surface block 23 is located within the plane region of the top plate 21. As the urging member 25, a known member can be applied in addition to the helical spring. The inner wall block 23 is in a basic state (initial state) in which the entire planar area is accommodated in the planar area of the top plate 21 in the core member 20 by the urging force of the urging member 25. At this time, when the core member 20 is viewed from the front, the wall surface 23 </ b> B at a position facing the inner wall surface constituting surface 23 </ b> A of the inner wall surface block 23 is arranged so as to overlap the notch portion of the notch portion 24.

  A portion of the inner wall block 23 that is overlapped at the position of the notch 24 functions as an abutting portion with which a rod RD inserted from a communicating portion of a mold to be described later abuts. When the rod RD is inserted into the notch 24, the wall surface 23B is pushed out from the position in the notch 24 by the rod RD. That is, the inner wall surface block 23 slides in a direction away from the inner wall surface body 22 (the horizontal arrow direction in FIGS. 4 and 5) against the urging force of the urging means 25. The sliding movement amount of the inner wall surface block 23 can be set by the overlapping entry amount of the wall surface 23 </ b> B into the notch 24. Further, the tip portion of the rod RD on the side to be inserted into the cutout portion 24 is formed in a tapered shape. As a result, the tip of the rod RD can easily enter between the notch 24 and the wall surface 23B, and the slide movement in the direction in which the inner wall block 23 moves away from the inner wall body 22 can be started smoothly. is there.

  Further, in the inner wall surface body 22, a guide rail 26 is disposed inside the wall surfaces 22 </ b> A and 22 </ b> B parallel to the direction in which the inner wall surface block 23 slides. The inner wall block 23 is provided with a roller 27 that can roll between the lower surface of the top plate 21 and the upper surface of the guide rail 26. The rollers 27 are respectively disposed on the upper and lower surfaces of the engaging portion 28 with which one end edge of a helical spring as the biasing member 25 is engaged. The inner wall block 23 is disposed between the top plate 21 and the guide rail 26 and has rollers 27 and 27 that roll on the lower surface of the top plate 21 and the upper surface of the guide rail 26. 23 can always move smoothly against the inner wall surface body 22 in the same plane. That is, after extracting the rod RD, the inner wall surface block 23 can always be returned to the initial position.

(Concrete block molding formwork)
Next, a concrete mold for forming the concrete block 10 described above using the core member 20 described above will be described. FIG. 7 is a side view showing a schematic configuration of the concrete block forming mold in the present embodiment. FIG. 8 is a plan view of FIG.
As shown in FIG. 7, the concrete block forming mold 40 includes a pedestal 42 and a side wall 44 that is disposed on the upper surface of the pedestal 42 and can be divided into two or more parts. The pedestal 42 and the side wall 44 are each connected to a drive mechanism (not shown), and are independently movable.

  In the side wall portion 44, a communication portion 46 that connects the outside and the inside of the side wall portion 44 is formed at a portion corresponding to the cutout portion 24 of the core member 20. A rod RD for sliding the inner wall surface block 23 is inserted into and removed from the communication portion 46. The concrete block forming mold 40 forms a concrete material filling space (molding space) by a space surrounded by the side wall portion 44 in a state where the rod RD is inserted into the communication portion 46 and the pedestal 42.

(Concrete block manufacturing method)
9-14 is explanatory drawing which shows the state in each process at the time of shape | molding the said concrete block in this embodiment.
First, as shown in FIG. 9, the core member 20 is set in an internal space of a concrete block forming mold 40 (hereinafter simply referred to as a mold 40). The core member 20 is disposed in a state where the position of the cutout portion 24 of the core member is aligned with the position of the communication portion 46 of the mold 40. Next, as shown in FIG. 10, the rod RD is inserted from the communication portion 46 into the cutout portion 24 of the core member 20 disposed from the outside to the inside of the mold 40. When the rod RD is inserted into the notch 24, the wall surface 23B as an abutting portion in an arrangement state overlapping with the position of the notch 24 abuts a part of the outer peripheral surface of the rod RD as shown in FIG. The rod RD is slid in a direction perpendicular to the insertion direction of the rod RD (a direction away from the inner wall surface body 22), so that the wall surface 23A protrudes outside the plane area of the top plate 21.

The rod RD inserted through the notch 24 functions as a stopper that resists the urging force of the helical spring 25 that is urging means. Therefore, it is possible to maintain a state in which at least a part of the wall surface 23A is slid out of the plane area of the top plate 21. In this way, the inner wall surface of the through hole 14 to be formed in the concrete block 10 is formed by the inner wall surface body 22 of the core member 20 and the wall surface 23A of the inner wall surface block 23.
A concrete material 50 is supplied to a concrete block molding space formed by the mold 40 and the core member 20 as shown in FIG. Since the top plate 21 is disposed in the planar position of the through hole 14 in the core member 20 disposed in the internal space of the mold 40, the concrete material 50 is mixed into the internal space of the through hole 14. There is no. The concrete material 50 supplied into the mold 40 is subjected to compaction processing by applying vibration or pressure by vibration generating means or pressurizing means.

  After the concrete material 50 in the concrete block forming space in the mold 40 is compacted, the rod RD is pulled out from the communication portion 46 (the notch 24 of the core member 20) of the mold 40. When the rod RD is pulled out, as shown in FIG. 13, the inner wall surface block 23 of the core member 20 returns from a position outside the planar area of the top plate 21 to a position within the planar area by the biasing force of the helical spring. Since the inner wall surface block 23 has a configuration in which the roller 27 rolls on the guide rail 26 provided in the arrangement along the urging direction on the inner wall surface body 22, the inner wall surface block 23 can be smoothly and reliably provided. It returns to the initial position (a state in which the inner wall surface block 23 is completely accommodated in the in-plane region of the top plate 21).

Thus, when the inner wall surface block 23 returns to the initial position, the planar area of the core member 20 as a whole can be accommodated in the planar area of the top plate 21. With such a core member 20, as shown in FIG. 14, after separating the side wall portion 44 from the pedestal 42, the core member 20 can be extracted (separated) upward from the pedestal 42. Thereby, even if it is the formwork 40 of an immediate mold release system, it becomes possible to manufacture efficiently the concrete block 10 which has the through-hole 14 of the inclined state. The concrete block 10 remaining on the upper surface of the pedestal 42 is stored together with the pedestal 42 or removed from the pedestal 42 after being transported to the stock yard (not shown) together with the pedestal 42.
When the concrete block 10 is taken out from the pedestal 42, the pedestal 42 is returned to the initial position (position where the concrete material is charged), and when the concrete block 10 is not taken out from the pedestal 42, the separate pedestal 42 is moved. The above steps can be repeated by disposing at the initial position.

  Although the concrete block forming mold core member according to the present invention, the concrete block forming mold having the same, and the manufacturing method of the concrete block using these have been described above, the present invention is limited to the above embodiments. Of course not. For example, in the present embodiment, a concrete block for revetment is described as a concrete example of the concrete block 10, but the concrete block 10 according to the present invention is not limited to this form. The point is that the through hole 14 provided in the concrete block 10 extends in a direction inclined with respect to the mounting surface of the concrete block 10 (in a state inclined in the height direction of the concrete block 10). Of course, there are applications other than revetment concrete blocks.

  Further, in the core member 20 in the present embodiment, the sliding amount by which the inner wall surface block 23 moves toward and away from the inner wall surface body 22 is defined by the overlapping amount in the sliding direction with the notch 24 in the initial state of the inner wall surface block 23. However, if a protrusion projecting in the radial direction of the rod RD is formed on the outer peripheral surface of the rod RD inserted into the notch 24, the inner wall surface exceeds the amount of overlap with the notch 24 in the initial state of the inner wall block 23. The block 23 can also be slid.

Furthermore, in the concrete block manufacturing method described in the present embodiment, when demolding the concrete block forming mold 40, a procedure for pulling out the core member 20 after disassembling the side wall portion 44 on the pedestal 42 is shown. A procedure of pulling out the core member 20 before disassembling the side wall portion 44 from the pedestal 42 may be adopted.
Furthermore, in the concrete block forming mold 40 according to the present embodiment, a configuration is described in which one concrete block 10 is formed per process in a state where the concrete block 10 is turned upside down. Of course, the concrete block forming mold 40 capable of simultaneously molding the concrete blocks 10, 10,.

DESCRIPTION OF SYMBOLS 10 Concrete block 11 River side wall surface 12 Slope surface side wall surface 13 Connection part 14 Through-hole 15 Recess 20 Core member 21 Top plate 22 Inner wall surface body 23 Inner wall surface block 23A Inner wall surface constituting surface 23B Wall surface 24 Notch 25 Energizing member Spring)
26 Guide rail 27 Roller 28 Engagement part 40 Concrete block molding form 42 Base 44 Side wall part 46 Communication part 50 Concrete material

Claims (6)

When producing a concrete block by immediate demolding, a core member for forming a through hole extending in the height direction of the concrete block by being disposed in a mold,
An inner wall surface constituting a part of the inner wall surface of the through hole;
An inner wall block which is movable toward and away from the inner wall body and constitutes the other part of the inner wall surface of the through hole by a part of the outer wall surface;
A biasing member that biases the inner wall block in a direction approaching the inner wall body;
A rod for moving the inner wall block away from the inner wall body against the urging force of the urging member by entering the inside of the mold from the outside of the mold and pressing the inner wall block with an outer peripheral surface; Have
A part of the wall surface of the mold frame and the inner wall surface body is formed with a notch portion into which the rod can be inserted and removed in a direction orthogonal to the depth direction of the through hole to be formed in the mold frame. A core member for a concrete block molding form.   The outer wall surface constituting the inner wall surface of the through hole in the inner wall block and the wall surface of the inner wall block facing the outer wall surface are both formed as inclined surfaces in the height direction of the concrete block. The core member for a concrete block forming mold according to claim 1. The inner wall block is provided with a roller,
The core member for a concrete block forming mold according to claim 1 or 2, wherein the roller is provided so as to be able to roll on a guide rail attached to the inner wall surface body.   The core member for forming a concrete block according to any one of claims 1 to 3, wherein the notch portion constitutes a part of an outer shape of the concrete block. A top plate coupled to the drive mechanism;
A side wall body disposed on the top plate and separable from the top plate;
The side wall body is formed with a communication portion that communicates the outer wall surface and the inner wall side of the opposing side wall portion,
In the space formed by the top plate and the side wall body, the core member for a concrete block forming mold according to any one of claims 1 to 4 is provided at a position of the communication portion. A concrete block molding form, characterized in that it is arranged in position. Forming a concrete block molding form according to claim 5;
A step of forming the above-described concrete block forming mold, and a rod is inserted from a communicating portion formed on a side wall of the concrete block forming mold to a notch formed in the core member for the concrete block forming mold. For molding a concrete block in the concrete block molding form by separating at least a part of the inner wall block to an outer position of a plane region of the top plate against a biasing force by the biasing member. Forming a space;
A step of charging the concrete material into the molding space and compacting the concrete material in the concrete block forming mold; and
By pulling out the rod from the cutout portion and the communication portion, the inner wall surface block located at a position outside the plane area of the top plate is returned to the plane area of the top plate by a biasing force. Process,
A concrete block comprising: a step of separating the core member for forming a concrete block mold and the side wall body from a pedestal; and a step of removing a concrete block formed in the molding space. Production method.