JP2016097560A - Method for manufacturing concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete block manufacturing method that can efficiently arrange piece members 25 to be fixed inside a form 20 molding a concrete block 10 and can improve the durability of the piece members 25 and the form 20 to which the piece members 25 are fixed.SOLUTION: In the concrete block manufacturing method for molding the concrete block 10 having a notch 11 using the form 20 with a recess 20A formed by a plurality of inner surfaces, the piece members 25 which are members arranged inside the form 20 to mold the concrete block 10 integrally with the form 20 and adhere to the side of the concrete block 10, which becomes a product, to be released from the form 20 in a releasing step from the form 20, are positioned and arranged by being contacted with at least two surfaces inside the form 20, and maintained in a state fixed to the form 20 by an electromagnet 30 at least during the time until completion of filling of ready-mixed concrete 15 in a molding step.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a concrete block in which a concrete block having a cutout portion is molded using a mold having a recess constituted by a plurality of inner surfaces, and the mold is disposed inside the mold and the mold Concrete that forms the concrete block integrally with a frame, and that is molded by using a piece member that is removed from the side of the concrete block that becomes a product in the demolding process from the mold The present invention relates to a block manufacturing method.

  Conventionally, in a method of manufacturing a concrete block having a cutout portion by a mold, in order to accurately form the cutout portion, a piece member for forming the cutout portion is attached to the product side at the time of demolding. It may be necessary to leave it out of the mold. For example, when a V-shaped cutout is formed at the end of a concrete block, the protrusion formed by providing the cutout may be formed into a cross-sectional shape with a sharp angle. Since the tip portion of the protruding portion having such a shape is likely to collapse when removed from the mold, it is necessary to remove the mold while the above-mentioned piece member is attached to the concrete block side.

  And as a method of attaching the above-mentioned piece member to the formwork, there is a method of fixing with bolts (bolt fixing method), but with this bolt fixing method, it takes time to install and remove the bolts, and the production efficiency Will be inferior. In particular, in the immediate demolding method (immediate demolding method) in which zero slump ready-mixed concrete is filled into a mold and molded by vibration and pressing, 1 from the filling of ready-mixed concrete to the demolding of the molded concrete block. Since the cycle time is as short as several minutes, the bolt fixing method significantly deteriorates the production efficiency.

  Also, in the immediate demolding method, if it is assumed that the top member is fixed with a bolt by a pressing process to the product material (see FIG. 9), which is a feature thereof, a large compressive force acts on the bolt with the top member fixed. To do. For this reason, the mold structure including the bolt and the surrounding frame member is adversely affected by deformation, fatigue, and the like, resulting in shortening the life of the mold. Furthermore, due to the structure of the quick removal machine that performs the quick removal manufacturing method, there may be a case where it is not possible to secure a space for the worker to enter the bolt fixing portion, and the degree of freedom of the product shape is limited.

  On the other hand, as a prior art, for example, in the slump concrete secondary product manufacturing formwork apparatus, the height of the frustum is obtained on both sides of the iron formwork to obtain the slump concrete molded product. An iron frustum hole forming mold having the same length as the thickness of the slump concrete forming part is installed, and the iron frustum hole forming mold is located in a line-symmetric position with the iron mold frame as the axis of symmetry. A manufacturing method of a slump concrete molded article having a hole using an electromagnet for fixing a frame with an electromagnet (see Patent Document 1) is disclosed.

According to this, it is possible to manufacture a slump concrete molded product having a hole by fixing an iron quadrangular frustum hole forming mold (an example of a piece member) without welding to an iron mold. In addition, the top member can be easily attached to and detached from the mold, not the bolt fixing method.
However, this prior art does not disclose a method of positioning and arranging a square frustum hole-forming mold (frame member) within the mold, and injects slump concrete into the mold and vibrates with a vibrator. It is a process to turn off the power of the electromagnet after stirring and the problem of further efficiency related to the arrangement of the detachable piece member, and the part of the formwork where the piece member and the piece member are mounted It does not solve the problem of durability.

JP 2006-231891 A (first page)

The problems to be solved regarding the manufacturing method of the concrete block are the problem of further efficiency in the arrangement of the top member fixed inside the mold for molding the concrete block, and the top member and the top member are fixed. However, the prior art has not proposed a method for solving the durability problem of the part of the formwork.
Accordingly, an object of the present invention is to provide a concrete block capable of efficiently arranging a top member fixed inside a mold for molding a concrete block and improving the durability of the top member and the mold to which the top member is fixed. It is in providing the manufacturing method of.

  According to one aspect of the method for producing a concrete block according to the present invention, in the method for producing a concrete block, the concrete block having a notch is molded using a mold having a recess constituted by a plurality of inner surfaces. A member which is arranged inside a mold and is formed integrally with the mold to mold the concrete block, and in the demolding process from the mold, attaches to the side of the concrete block to be a product and demolds In the molding process in which the top member to be placed is positioned by contacting and positioning at least two surfaces inside the mold, and the concrete block is molded by filling the concrete into the mold Is held in a fixed state on the mold.

Moreover, according to one form of the manufacturing method of the concrete block concerning this invention, in the shaping | molding process by the said formwork, it is the stage in which the ready-mixed concrete was filled into the inside of the said formwork, Comprising: In order to shape | mold this ready-mixed concrete It is possible to release the holding of the top member to the mold by the electromagnet before the step of applying a vibration or the step of applying a pressing force.
Moreover, according to one form of the manufacturing method of the concrete block concerning this invention, the said 2 surfaces which the said top member contacts can be the inner bottom face of the said formwork, and one inner side surface, It can be characterized by the above-mentioned. .

Moreover, according to one form of the manufacturing method of the concrete block concerning this invention, it fixes by the said piece member contacting and positioning to the inner bottom face of the said formwork, one inner side surface, and at least one inner end surface. It can be characterized by being.
Moreover, according to one form of the manufacturing method of the concrete block concerning this invention, the said ready-mixed concrete is adjusted to a zero slump, and the said formation process can be characterized by the process of an immediate demolding method.

  According to the method for producing a concrete block according to the present invention, the top member fixed inside the mold for molding the concrete block can be arranged efficiently, and the durability of the top member and the mold to which the top member is fixed. There is a special advantageous effect that can be improved.

It is a perspective view which shows the example of the form of the concrete block shape | molded by the manufacturing method concerning this invention, and the top member used as a part of shaping | molding type | molds. It is a perspective view which shows the example of a form of a concrete block used for the manufacturing method concerning this invention, and a top member. It is a perspective view which shows the example of a form which set the top member to the formwork. It is a perspective view which shows the example of the form which filled the inside of a formwork with the ready-mixed concrete. It is a perspective view which shows the form example which reversed the formwork from the state of FIG. It is a perspective view which shows the example of a form which demolded the concrete block in the state with the top member. It is sectional drawing which shows the example of a form which set the top member to the formwork. It is sectional drawing which shows the example of the form which filled the inside of a formwork with ready-mixed concrete. It is sectional drawing which shows the example of a form which pressed the ready-mixed concrete. It is sectional drawing which shows the form example of the state which pulled up the press board and the frame board. It is sectional drawing which shows the form example of the state which slid and mounted the pallet for receiving the molded concrete block on the upper surface of a formwork. It is sectional drawing which shows the form example of the state which reversed the formwork with the pallet. It is sectional drawing which shows the example of a form which demolded the concrete block in the state with the top member. It is sectional drawing which shows the example of the form of the concrete block shape | molded by the manufacturing method concerning this invention. It is sectional drawing which shows the state which inclined the formwork, when arranging a top member in a formwork.

  Hereinafter, an example of a concrete block manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 to 15). In the present invention, a concrete block 10 having a notch portion 11 as in the embodiment shown in FIG. 1 is constituted by a plurality of inner surfaces (an inner bottom surface 21, an inner surface 22, an inner end surface 23) as shown in FIG. The present invention relates to a method for manufacturing a concrete block that is molded using a mold 20 having a recess 20A. Here, the notch 11 includes all forms that can be cut out of a part of the material, and means, for example, a hole, a groove, a stepped portion, or the like. In addition, the concrete block of this embodiment is installed on the shoulder of the road, and the protrusion 12 formed by providing the groove-shaped notch 11 for preventing grass, the protrusion 13 at the boundary of the walking path, and An apron portion 14 is provided. Further, in more detail, as shown in FIG. 2, the plurality of inner surfaces of the recess 20A have an inner bottom upper step surface 21a, an inner bottom lower step surface 21b, an inner surface 22a on one side, an inner surface 22b on the other side, It is comprised from the inner end surface 23a.

  Reference numeral 25 denotes a top member, which is a member that is arranged inside the recess 20 (inside the recess 20A) as shown in FIG. In the demolding step from 20 (see FIGS. 5 and 6), the member is attached to the side of the concrete block 10 to be a product and demolded as shown in FIG.

  And according to the structure of this invention, this piece member 25 is arrange | positioned by contacting and positioning at least two surfaces inside the formwork 20 (refer FIG. 3), and ready-mixed concrete goes into the formwork 20 inside. In the molding process in which the concrete block 10 is filled (see FIG. 4), the concrete block 10 is held in a state fixed to the mold 20 by the electromagnet 30. In the present embodiment, the inner surface 21 (21a) and one inner surface 22 (22a) of the mold 20 are the at least two surfaces inside the mold 20 with which the top member 25 contacts. .

  According to this, since the top member 25 is held in contact with the two inner surfaces of the mold 20 (see FIG. 3), positioning can be easily performed, work efficiency can be improved, and productivity can be improved. . Since the top member 25 is held by the mold 20 by the electromagnet 30 (see FIGS. 5 and 7 and the like), the power switch 31 (see FIG. 7 and the like) is attached to and removed from the top member 25. ) On / off operation (on / off operation), etc., can be efficiently performed with simple operations, and productivity can be improved. In addition, as shown in FIGS. 5 and 7, etc., a plurality of electromagnets 30 according to this embodiment are mounted in a row in a state of being fitted into the mold 20, but the present invention is limited to this. There is nothing, and it is only necessary to install it appropriately according to the form of the mold 20.

  Furthermore, in this embodiment, as shown in FIG. 1, the piece member 25 is divided into two in the longitudinal direction, and each piece member 25 has an inner bottom surface 21 of the mold and one inner side surface. 22 and at least one inner end face 23 are fixed by being brought into contact with each other and positioned. More specifically, the one-side piece member 25A has a contact bottom surface 25a, a contact side surface 25b, and a contact end surface 25c on one side corresponding to an inner bottom upper step surface 21a corresponding to the mold frame 20 (recess 20A), one side inner surface 22a and one side. It is positioned and fixed in contact with the inner end surface 23a. Further, the other one-side piece member 25B has a contact bottom surface 25a, a contact side surface 25b, and another one-side contact end surface 25d corresponding to the inner frame 22a (recess 20A), the inner bottom upper step surface 21a, the one-side inner surface 22a, and the like. It is positioned and fixed in contact with the inner end surface (not shown) on the other side. Note that the contact end surface 25c on one side of the one-side piece member 25A and the contact end surface 25d on the other side of the other one-side piece member 25B are in contact with each other, and both are positioned in the longitudinal direction. It is configured to be held and fixed inside.

According to this, for example, as shown in FIG. 15, in a state where the formwork 20 is inclined, the piece member 25 is simply disposed so as to be fitted into a predetermined portion in the recess 20 </ b> A of the formwork 20. Is positioned. Then, by turning on the power switch 31 of the electromagnet 30, the piece member 25 is held in a state of being integrated and fixed to the mold 20. Moreover, if the power switch 31 of the electromagnet 30 is turned off, the top member 25 can be easily removed. Therefore, the work efficiency can be increased, the burden on the worker can be reduced, and the productivity can be improved.
The form in which the top member 25 is held in contact with at least two surfaces inside the formwork 20 is not limited to the above-described form. For example, the top member 25 is slightly fitted to the inner bottom upper step surface 21a. The contact bottom surface 25a of the top member 25 is in contact with the shallow concave bottom surface formed by the step, and the other contact side surface of the top member 25 is in contact with the surface forming the step to be positioned. Also good. According to this, a band-shaped surface having a slight height, which is a surface forming a step, is substantially another surface, and the top member 25 is positioned in contact with at least three surfaces. Here, the surface inside the mold 20 is not limited to a flat surface, but of course includes a curved surface.

  Further, in the present embodiment, in the molding process using the mold 20, the ready-mixed concrete 15 is filled into the mold 20, and a process of applying vibration or pressing force to mold the ready-mixed concrete 15 is performed. Is set so as to release the holding of the top member 25 to the mold 20 by the electromagnet 30 at a stage prior to the step of adding the. That is, when the filling of the ready-mixed concrete 15 is completed, the power switch 31 of the electromagnet 30 is turned off, and the fixing of the top member 25 to the mold 20 is released. Vibration is applied by the vibrator (not shown), and the ready-mixed concrete 15 is compression-molded by the press plate 26 at the upper part of the mold 20.

  According to this, when the vibration is applied to the mold 20 or when the ready-mixed concrete 15 is compression molded by the press plate 26, the fixing of the top member 25 to the mold 20 by the electromagnet 30 is released. . Therefore, the top member 25 and the portion of the main body of the mold 20 with which the top member 25 is in contact are unlikely to have a bad influence such as deformation or fatigue. Therefore, the mold frame 20 and the piece member 25 have high durability, and the mold life can be extended. Further, the top member 25 can be easily arranged and fixed and attached / removed (attachment / detachment work) with positioning on the mold 20, and productivity can be improved. Furthermore, it is possible to perform the work much more easily than the bolt fixing method even in the case where the space for entering the worker cannot be secured widely for the attaching / detaching work of the top member 25 to the formwork 20, The degree of freedom of design increases without being restricted by the shape of the concrete block.

  Next, based on FIGS. 7-15, the concrete example of the manufacturing method which uses the ready-mixed concrete 15 adjusted to the zero slump and the molding process of the concrete block 10 is a process of an immediate demolding method is demonstrated in detail.

  First, as shown in FIG. 7, the frame member 25 is installed inside the mold 20, and the mold 20 with the frame plate 24 placed on the upper surface of the mold 20 is set in a state where it is placed horizontally. Is done. When the piece member 25 is set, as shown in FIG. 15, when the work is performed with the mold frame 20 tilted, the piece member 25 is moved by gravity due to the inner bottom surface 21 (inner bottom upper stage) inside the mold frame 20. Since the surface 21a) and the inner side surface 22 (one side inner surface 22a) are in contact with each other and positioned, this can be performed reliably and easily.

  And the electromagnet 30 is installed in the location which attaches the piece member 25 of the formwork 20, and magnetic force generate | occur | produces by turning on the operator's hand switch (it turns on), and the piece member 25 is the formwork 20 It is in a fixed state. The frame plate 24 is opened following the opening on the upper surface of the mold 20 so that the ready-mixed concrete 15 has a volume enough to contain the ready-mixed concrete 15 by reducing the volume by increasing the density by vibration or pressing. , Its thickness is provided.

  Next, as shown in FIG. 8, the solid concrete 15 that has been kneaded (zero slump) is charged and filled into the mold 20. The method for charging the ready-mixed concrete 15 is not particularly limited. For example, a method is adopted in which a box-shaped supply box whose upper and lower sides are opened is slid in the horizontal direction and is input from the supply box into the formwork 20. be able to. In this embodiment, when the filling of the ready-mixed concrete 15 into the mold 20 is completed, the power switch 31 of the electromagnet 30 is turned off, and the fixing of the top member 25 to the mold 20 by the electromagnet 30 is released. Is done.

  Next, vibration is applied by a vibrator installed in the mold 20, and the ready-mixed concrete is compression-molded by a press plate 26 at the top of the mold 20, as shown in FIG. The pressing device 27 that presses the press plate 26 may selectively use an existing mechanism as appropriate. Of course, the filling work of the ready-mixed concrete 15 into the mold 20 can be appropriately performed, for example, by performing a plurality of times including vibration by the vibrator.

  Thereafter, the press plate 26 and the frame plate 24 are pulled up as shown in FIG. 10, and the pallet 40 is slid and positioned on the upper surface of the mold 20 as shown in FIG. Then, the mold 20 is inverted as shown in FIG. 12, and the concrete block 10 molded as shown in FIG. 13 is removed from the mold 20 with the top member 25 still attached. Demolding can be easily performed by applying vibration by a vibrator. And as shown in FIG. 14, the top member 25 is removed, and the concrete block 10 is completed through a curing period.

  In this way, by adopting the fixing method of the piece member 25 using the electromagnet 30, the piece member 25 is fixed before the ready-mixed concrete is charged and the fixed member 25 is released after the ready-mixed concrete is supplied. This is possible only by turning on / off the switch 31), and all the above-mentioned problems can be solved, and the productivity can be improved.

  The present invention is not limited to the shape of the concrete block 10 having the notch 11 on one side as described above. For example, a concrete block in which the notch 11 is provided on both sides is molded. It can also be suitably applied to. In that case, the electromagnets 30 corresponding thereto may be appropriately arranged on the mold 20 so that the top members 25 can be arranged and fixed in two rows inside the mold 20.

  Moreover, although this embodiment is the concrete block 10 installed in the road shoulder provided with the notch part 11 for weed prevention, this invention is not limited to this, Other notch parts Of course, it can be suitably applied to the production of concrete blocks used for other purposes.

  In the above description, the manufacturing process of the immediate demolding method using the ready-made concrete of zero slump has been described, but the present invention is not limited to this, and the concrete block is formed by the casting method of the ready-made slump concrete. The present invention can also be suitably applied when a concrete block is manufactured using a formwork.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Concrete block 11 Notch part 12 Protrusion part 13 Protrusion part 14 of a pedestrian road boundary Apron part 15 Formwork 20A Recess 21 Inner bottom surface 21a Inner bottom upper step surface 21b Inner bottom lower step surface 22 Inner side surface 22a One side inner surface 22b Other side inner surface 23 Inner end surface 23a One side inner end surface 24 Frame plate 25 Top member 25A One side top member 25B Another side top member 25a Contact bottom surface 25b Contact side surface 25c One side contact end surface 25d Other side contact end surface 26 Press plate 27 Press device 30 Electromagnet 31 Power switch 40 Pallet

Claims (5)

In a concrete block manufacturing method in which a concrete block having a notch is molded using a mold having a recess constituted by a plurality of inner surfaces,
A member that is arranged inside the formwork and forms the concrete block integrally with the formwork, and is attached to the side of the concrete block that becomes a product in a demolding process from the formwork. In the molding process in which the piece member to be molded is placed by contacting and positioning at least two surfaces inside the mold, and the concrete block is molded by filling raw concrete into the mold, A method for producing a concrete block, wherein the concrete block is held in a state of being fixed to the mold by an electromagnet.   In the molding process using the mold, the electromagnet is a stage in which the ready-mixed concrete is filled into the mold, and before the process of applying vibration or pressing to form the ready-mixed concrete. The method for producing a concrete block according to claim 1, wherein the holding of the top member to the formwork is released.   The method for manufacturing a concrete block according to claim 1 or 2, wherein the two surfaces with which the top member contacts are an inner bottom surface of the mold and one inner side surface.   3. The concrete block according to claim 1, wherein the piece is fixed by contacting and positioning on an inner bottom surface, one inner side surface and at least one inner end surface of the mold. Production method.   The method for producing a concrete block according to any one of claims 1 to 4, wherein the ready-mixed concrete is adjusted to zero slump, and the molding step is a step of an immediate demolding method.