JP5518424B2 - Forming apparatus for molding concrete product and method for producing concrete product - Google Patents

Description

The present invention relates to a formwork device for molding a concrete product such as a side groove block , and a method for producing a concrete product using the formwork device .

  The gutter block (cave, box culvert) having a water channel inside is constructed for the purpose of providing a water channel on an existing road or for quickly draining underground water in farmland or the like. Depending on the purpose of concrete products such as side gutter blocks, slits for collecting water, openings with steps for attaching gratings (groove covers), curbs, paving tiles, etc. may be formed integrally. (See FIG. 12). Concrete products such as side gutter blocks have become widespread due to urban planning, and products of various designs have been manufactured with the times. Conventional side gutter blocks, which have a relatively simple outer shape, such as a square tube shape and a kamaboko shape, are now complicated due to the curb or paving tile pattern on the top of the side gutter block. ing. The slit formed in the upper surface of the side groove block has a narrow width so that the heel of the high heel is not caught.

  As a method of molding the side groove block, there are a method of molding in the same direction as the use state (upper surface is upward) and a method of molding in a direction reversed from the use state (upper surface is downward). The method of molding the side groove block with the upper surface facing upward is relatively easy to mold. In the method of molding the side groove block with the upper surface facing downward, the surface that is in contact with the upper surface of the middle mold is the lower surface of the water channel, and therefore, the side groove block can be formed smoothly without a step and having a small roughness coefficient.

  A formwork device for molding concrete products such as a side groove block forms an outer mold (a front frame, left and right side frames, a rear frame, and a base) that forms the outside of the concrete product, and an inside of the side groove block. It is equipped with a narrow mechanism that allows the middle mold to be narrowed by connecting the middle mold (core) and the middle mold with multiple ribs to be narrowed by a link mechanism so that it can be narrowed. After placing and curing and molding, open the left and right side frames and the rear frame, narrow the middle mold to form the gap necessary for pulling out the concrete product, then pull out the middle mold from the concrete product Take out the concrete product or pull out the concrete product from the middle mold and take out the concrete product. Although the initial middle mold was disassembled and removed, disassembly and assembly are complicated, so now the middle mold with multiple ribs is connected to the rotation shaft by a link mechanism, and the rotation shaft is rotated by a tool such as a wrench. By doing so, it has a structure that narrows down the middle size by operating narrowly (Patent Documents 1 to 10).

  As a method of taking out a concrete product such as a molded side groove block from a formwork device, a concrete product is slightly lifted by a crane and moved forward or backward of the formwork device, and then pulled out from a narrowed middle die and taken out (patent) In the case of molding the side groove block in which the water collecting slit is formed from the front side to the back side with reference 1 to 8), the narrowed middle mold is drawn out from the concrete product with the upper surface on which the water collecting slit is formed facing downward. The concrete product is then suspended by a crane and the water collecting slit of the concrete product is moved horizontally to the front or rear of the formwork device along the base frame (Patent Document 9), and the narrowed middle mold is removed from the concrete product. After pulling it out, suspend the concrete product with a crane and move it horizontally along the underframe. Either by, there is a method (Patent Document 10) taking out lifting concrete products by a crane.

  However, in the case of a structure in which a concrete product is slightly lifted by a crane described in Patent Documents 1 to 8 and pulled out from the middle mold, the gap between the middle mold and the outer mold in which the lifting amount by which the concrete product is lifted by the crane is narrowed is removed. When the concrete product is pulled out from the middle mold and taken out, the concrete product can easily collide with the formwork device even if the crane slightly swings, and the concrete product collides with the formwork device. There is a problem that cracks and chips are likely to occur. In addition, when the side groove block has a complicated shape by forming protrusions such as curbs or uneven patterns such as pavement tiles on the upper surface of the side groove block, when forming the side groove block with the upper surface facing downward, It is difficult to remove the upper surface of the side groove block by simply lifting the block. Moreover, in the case of the structure of patent document 9, it cannot apply to the side groove block to which a part of water collecting slit is connected, or the side groove block without a water collecting slit. In the case of the structure described in Patent Document 10, a manufacturing space is required for pulling out the narrowed middle mold from the side groove block.

Japanese Utility Model Publication No. 2-8907 Japanese Utility Model Publication No. 3-108411 JP-A-6-134745 Noto 2578215 gazette Japanese Patent No. 2957644 Japanese Patent No. 3002617 Japanese Patent No. 3288868 Japanese Patent No. 3329914 JP 2004-358876 A JP 2008-238441 A

  Concrete products such as side groove blocks are required to have good workmanship with few cracks and chips. For this reason, a formwork device for molding a concrete product such as a side groove block is required to have a structure with good operability so that the concrete product does not collide with the formwork device when the concrete product is demolded. In addition, when it becomes a complicated shape by forming protrusions such as curbs and uneven patterns such as pavement tile patterns on the top surface of concrete products, blocks for side grooves where a part of the water collection slit is connected, Even in the case of a side groove block without a water collecting slit, it is required that the side groove block be easily removed. Furthermore, if it is not necessary to pull out the narrowed middle mold from the side groove block, it can be manufactured in a space-saving manner, and the labor for returning the pulled middle mold to a predetermined position of the formwork apparatus can be saved.

Therefore, the object of the present invention is to adopt a structure in which the narrowed middle mold is not pulled out from the side groove block, and a protrusion such as a curb or an uneven pattern such as a paving tile pattern is formed on the upper surface of the concrete product such as the side groove block. Even when some or all of the water collecting slits are connected, it is easy to remove the concrete product, and when removing the side groove block, the side groove block collides with the formwork device. It is an object of the present invention to provide a mold device for molding a concrete product such as a side groove block having a difficult and easy-to-operate structure, and a method of manufacturing a concrete product using the mold device .

The formwork device for molding a concrete product according to the present invention includes a left and right side frame that forms the outside of a concrete product such as a side groove block, a front frame and a back frame, a middle mold that forms the inside of the concrete product, and the middle mold A frame that is arranged on the front side of the frame and supports the middle mold, a narrowing mechanism that narrows the middle mold, and a middle mechanism that is arranged on the front side of the base and moves the middle mold up and down while keeping the base and the middle mold parallel. The narrowing mechanism includes a rotating shaft connected to the frame, and a link mechanism for narrowing the middle mold in conjunction with the rotating shaft, the upper side of the lifting mechanism Is provided with a connecting member having a predetermined shape, and the rotating shaft can be positioned at a predetermined height above the lifting mechanism.
The method for producing a concrete product according to the present invention includes a demolding position in which a concrete product is molded using the mold device for molding the concrete product, and the concrete product is pulled out from a middle mold of the mold device by lifting means such as a crane. The intermediate mold is narrowed by lifting the rotary shaft of the formwork device with a tool such as a wrench and lifting it to the same height or higher, and the rotary shaft of the formwork device The concrete product is pulled out from the middle mold while being positioned at a predetermined height above the lifting mechanism. In the present invention, the concrete product is formed such that the upper surface thereof is formed with protrusions such as curbstones or an uneven pattern such as a paving tile pattern, or the concrete product is connected to a part or all of the upper surface thereof. And the concrete product is molded with its upper surface facing downward, the molded concrete product is detached from the base of the formwork apparatus, and then pulled out from the middle mold of the formwork apparatus.
The connecting member is a member for positioning the rotating shaft at a predetermined height above the lifting mechanism, and the rotating shaft is positioned at a predetermined height above the lifting mechanism via the connecting member. The height position is the demolding position of the concrete product (the height position at which the concrete product is pulled out from the middle mold). Examples of the connecting member include a rod-shaped member, a block member, a toggle, a crank, a pantograph, a cam, a link, a hydraulic jack, and a screw.

In the present invention, the concrete product is lifted to a position equal to or higher than a demolding position (a height position where the concrete product is pulled out from the middle mold) by which the concrete product is pulled out from the middle mold by lifting means such as a crane, and the rotating shaft Is rotated to narrow the middle mold to form a gap necessary for pulling out the concrete product from the middle mold, and the rotary shaft is moved to a predetermined height above the elevating mechanism via a connecting member having a predetermined shape. Then, the concrete product is pulled out from the middle mold in a state of being positioned at the height. That is, when the concrete product is lifted at the same height as the demolding position, when the concrete shaft is lifted and the rotating shaft is rotated to make the middle die narrow, the middle die and the concrete Since a gap is formed between the lower side and the inner side of the product, the middle mold is lowered by its own weight, but the rotating shaft is positioned at a predetermined height above the lifting mechanism via the connecting member. The lowering of the middle mold stops at the position, and a gap is formed with almost the entire circumference of the concrete product. Therefore, the concrete product can be pulled out from the middle mold in a state where the rotating shaft is positioned at a predetermined height above the lifting mechanism via the connecting member. Further, when the concrete product is lifted so as to be higher than the demolding position, when the concrete shaft is lifted and the rotating shaft is rotated to make the middle die narrow, the middle die and the Since a gap is formed between the lower side on the inner side of the concrete product, the middle mold descends by its own weight and contacts the lower side on the inner side of the concrete product. Next, when the concrete product is lowered to a height position where the rotating shaft is positioned at a predetermined height above the lifting mechanism via the connecting member, a gap is formed between substantially the entire circumference of the concrete product. The Therefore, it is possible to pull out the said concrete product in a state where the rotating shaft is positioned above a predetermined height of the lifting mechanism from the middle size. According to the present invention, since it is not necessary to pull out the narrowed middle mold from the concrete product, it can be manufactured in a space-saving manner, and the labor for returning the pulled middle mold to a predetermined position of the formwork apparatus can be saved.

  According to this invention, the dimension of the predetermined height which makes the said concrete product float from a base can be set larger than the dimension of the clearance gap formed by the lower side of the said concrete product. That is, in the present invention, the concrete product is floated by a gap in the height direction between the window hole of the front frame that covers the periphery of the rotating shaft and penetrates the frame for supporting the middle mold and the frame. be able to. Therefore, the upper surface of the concrete product is formed with protrusions such as curbs or uneven patterns such as a paving tile pattern, or a part or all of the upper surface of the concrete product is connected, and the concrete product is It is easy to mold with the upper surface facing downward, and pull out from the middle mold after the upper surface of the concrete product is detached from the base.

  Here, if the front frame is configured to be detachably attached to the base, the height of the middle mold is such that the height gap between the window hole of the front frame and the frame is high. It is not limited to size. For example, the middle frame can be raised together with the front frame by attaching the front frame in an insertable manner from above the base or by fitting in from the upper portion of the base. Even when the rising height is not limited to the front frame, and the upper surface of the concrete product protrudes beyond the size of the gap by a protruding portion such as a curbstone, it is easy to completely float the concrete product.

The present invention, the frame and arm of a predetermined length is extended downward from, are arranged guide rollers pairs sandwiching the front and rear of the arm portion in the lifting mechanism, the medium-sized It is characterized in that it can be raised and lowered while being cantilevered.

  According to the present invention, the elevating mechanism moves the middle mold up and down smoothly while keeping the base and the middle mold parallel. Therefore, it is difficult for impact and vibration to be applied to the concrete product during the demolding operation of the concrete product, and a concrete product with good workmanship with few cracks and cracks is completed.

The present invention is characterized in that the connecting member is a flat cam, characterized in that it is fixed coaxially to the rotating shaft. Here, examples of the planar cam include a tangential cam, a disc cam (eccentric cam), a semi-disc cam, a mushroom cam, and a triangular cam.

  According to the present invention, after the concrete product is pulled out from the middle mold, the middle mold is returned to the original position by a simple operation of rotating the rotating shaft. In the present invention, since the middle mold is moved up and down by rotating the plane cam coaxially fixed to the rotating shaft, the middle mold is moved up and down smoothly along the tangential shape of the plane cam, During the operation of returning the middle mold to the original position, it is difficult for impact and vibration to be applied to the middle mold, and there is no possibility of damaging the middle mold. In addition, the flat cam is detachably coaxially fixed to the rotating shaft so that the shape and size of the outer periphery of the flat cam are changed according to the shape and size of the inner periphery and outer periphery of the concrete product. They can be prepared and dealt with by appropriately exchanging them.

  According to the present invention, when the concrete product is lifted by a lifting means such as a crane so as to be at the same height as the demolding position (the height position at which the concrete product is pulled out from the middle mold), the rotary shaft is moved by a tool such as a wrench. With a simple operation that only turns, a gap is formed between the concrete product and the concrete product, and the concrete product is removed from the middle mold with the rotating shaft positioned above the lifting mechanism via the connecting member. Can be pulled out. Also, if the concrete product is lifted by a lifting means such as a crane so as to be higher than the demolding position (the height position at which the concrete product is pulled out from the middle mold), the rotating shaft is rotated by a tool such as a wrench, A gap is formed over the entire circumference of the concrete product by a simple operation of simply lowering the concrete product to a position where the rotating shaft is positioned above the elevating mechanism via the connecting member. Can be pulled out from. According to the present invention, since it is not necessary to pull out the narrowed middle mold from the concrete product, it can be manufactured in a space-saving manner, and the labor for returning the pulled middle mold to a predetermined position of the formwork apparatus can be saved. And, after pulling out the concrete product from the middle mold, when returning the middle mold to its original position, the middle mold is moved up and down by rotating a plane cam coaxially fixed to the rotating shaft, The raising / lowering movement of the middle size is a smooth movement.

According to the present invention, the elevating mechanism moves the middle mold up and down smoothly while keeping the base and the middle mold parallel. Therefore, it is difficult for impact and vibration to be applied to the concrete product during the demolding operation of the concrete product, and a concrete product with good workmanship with few cracks and cracks is completed.
According to the present invention, since the predetermined height dimension for floating the concrete product from the base can be set larger than the gap dimension formed between the lower side of the concrete product, the top surface of the concrete product is curb. Even when a projection or projection pattern such as a pavement tile pattern is formed, or even when a part or all of the upper surface is connected, the concrete product is molded with the upper surface facing downward, thereby providing concrete. The outside of the product is easily removed from the outer mold of the formwork device.

It is a side view which illustrates the formwork apparatus for concrete product shaping | molding of this invention. It is a side view which illustrates operation | movement of the said formwork apparatus. It is a fragmentary sectional view which shows the structure of the said formwork apparatus from a side surface. It is a fragmentary sectional view which shows the structure of the said formwork apparatus from a side surface. It is a figure which shows the said formwork apparatus, Fig.5 (a) is a front view, FIG.5 (b) is a rear view. It is a flowchart figure which shows the manufacture procedure of the concrete product of this invention. It is a front view which illustrates operation | movement of the said formwork apparatus. It is a front view which illustrates operation | movement of the said formwork apparatus. It is a front view which illustrates operation | movement of the said formwork apparatus. It is a figure which shows the other example of the formwork apparatus for concrete product shaping | molding of this invention, Fig.10 (a) is a front view, FIG.10 (b) is a rear view. It is a front view which illustrates a plane cam. It is a perspective view which illustrates the gutter block which has a water channel inside. It is a perspective view which illustrates an internal structure of a middle size.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated below based on drawing.

(Side groove block)
FIG. 12 is a perspective view illustrating a side groove block 200 having a water channel inside. The side groove block 201 shown in FIG. 12 (a) has a substantially quadrangular outer shape and is tapered downward, a water collection slit 200b is formed on the upper surface 200c, and a protruding portion from which a part of the upper portion protrudes. A (curbstone) 220 is integrally formed, and an inner side 200d thereof has a cylindrical shape. The side groove block 202 shown in FIG. 12B has a substantially rectangular cylindrical shape, and a pavement tile pattern is integrally formed on the upper surface 200c thereof, and an inner side 200d thereof has a rectangular cylindrical shape. The side groove block 203 shown in FIG. 12 (c) has a cylindrical shape with an outer shape of an approximately semi-cylindrical shape. A stepped opening 200e for attaching a grating (groove cover) is formed on the upper surface 200c, and an inner side 200d thereof is an semi-cylindrical shape. It has a cylindrical shape. The present invention is applied to the manufacture of cylindrical side groove blocks 200 having various shapes such as a simple cylindrical shape in addition to the complicated cylindrical shape shown in FIGS. 12 (a) to 12 (c).

(Embodiment of the present invention)
FIG. 1 is a side view illustrating a formwork device 1 for molding a concrete product of the present invention, and shows a state in which left and right side frames 30 and 30 and a rear frame 40 are closed. The formwork device 1 for molding a concrete product according to the present invention forms the outside of the side groove block 200 with the front frame 50, the left and right side frames 30, 30, the rear frame 40, and the base 20. The inner side 200d of the side groove block 200 is molded.

  In the middle mold 60, a middle mold in which a plurality of ribs are divided so as to perform a narrow operation is connected so as to be narrowed by a link mechanism. The middle mold 60 includes upper and lower middle molds (ribs) 61 and 63, and left and right middle molds (ribs). 62 and 64 (see FIG. 5 and the like). The narrowing mechanism of the middle mold 60 is a link mechanism having a rotating shaft 90 that is a central axis of the middle mold 60 and is attached through the upper middle mold 61, and a rotating shaft 96 linked to the rotating shaft 90 by a cam 66 and a crank 67. The left and right middle molds 62 and 64 and the lower middle mold 63 are connected to the link mechanism. That is, guide grooves 633 are formed in the left and right middle dies 62 and 64, respectively, and the left and right pins 632 of the movable member connected to the lower middle mold 63 move along the left and right guide grooves 633. Thus, the middle mold in which the ribs are divided into a plurality of parts by the link mechanism is operated in a narrow manner (see FIGS. 13A, 13B, and 13C). Note that the upper middle mold 61 and the lower middle mold 63 indicate a relative positional relationship, and even when the upper and lower sides thereof are inverted (even if the lower middle mold 61 and the upper middle mold 63 are formed). The same narrowing operation is performed.

  2 to 4 are side views illustrating the formwork apparatus 1 of the present embodiment, and show a state in which the left and right side frames 30, 30, the rear frame 40, and the front frame 50 are opened. FIG. 2 shows a state immediately before the side groove block 200 is lifted by the crane apparatus 100. 3 and 4 are partial cross-sectional views showing the structure of the mold apparatus 1 of the present embodiment from the side, FIG. 3 shows a state immediately before the side groove block 200 is lifted, and FIG. 4 shows the side groove block 200. This shows a state where the is lifted. FIG. 5A is a front view of the mold apparatus 1 of the present embodiment, and FIG. 5B is a rear view of the mold apparatus 1 of the present embodiment.

In the present embodiment, the frame 65 that covers the periphery of the rotation shaft 90 extends forward from the middle mold 60, supports the middle mold 60 in a cantilever manner , and the arm portion 73 is horizontally in front of the middle mold 60. Two pairs of guide rollers 71 and 72 provided in an elevating mechanism 70 that extends from the protruding frame 65 and is disposed on the front side of the base 20 support the front and rear of the arm portion 73 therebetween. It has a configuration (see FIGS. 3 and 4). One pair of guide rollers 71 and 72 are arranged on the upper side and the lower side of the lifting mechanism 70 at predetermined intervals. In addition, a pair of pressing blocks 74 (shown in a trapezoidal shape in FIG. 5A) provided in the lifting mechanism 70 are configured to support the left and right sides of the arm portion 73 (see FIG. 5 and the like). ). According to the present embodiment, the middle die 60 is cantilevered by sandwiching the front and rear of the arm portion 73 by the two pairs of guide rollers 71 and 72 arranged in the lifting mechanism 70, and the base 20 and the middle die 60 are parallel to each other. The middle mold 60 is moved up and down smoothly while keeping it. Therefore, when the side groove block 200 is removed from the mold, an impact or vibration is not easily applied to the side groove block 200, and a concrete product with good workmanship with few cracks and cracks is completed. In this embodiment, two pairs of guide rollers 71 and 72 are used, but three or more guide rollers may be used as necessary. In the present embodiment, the trapezoidal holding block 74 is used, but a structural member in which a rectangular parallelepiped, an L-shaped bracket, or the like is combined may be used.

  In the present embodiment, the rotating shaft 90 is positioned above the elevating mechanism 70 via the connecting member 80. That is, a shaft 98 parallel to the rotation shaft 90 is disposed on the upper surface plate 75 of the lifting mechanism 70 disposed on the front side of the base 20 via the support member, and this shaft 98 is connected to the roller 97 as a connecting member. It is inserted. The rotating shaft 90 is connected to the lifting mechanism 70 via the connecting member 80 at a position where the outer peripheral side surface 80a of the flat cam 80 that is coaxially fixed to the front side of the rotating shaft 90 contacts the outer peripheral side surface 97a of the roller 97. It is positioned upward (FIG. 5A).

  In the present embodiment, the position of the outer peripheral side surface 97a of the roller 97 is fixed at a predetermined height from the base 20. Therefore, when the maximum radius C1 (see FIG. 11A) of the flat cam 80 coaxially fixed to the rotating shaft 90 is approaching the connecting member 97, the outer peripheral side surface 80a of the flat cam 80 is the upper surface of the connecting member 97. When abutting against 97a, the distance between the rotating shaft 90 and the connecting member 97 is reduced (FIG. 7A). Further, when the maximum radius C1 of the flat cam 80 coaxially fixed to the rotating shaft 90 is away from the connecting member 97, the rotating shaft 90 is moved when the outer peripheral side surface 80a of the flat cam 80 comes into contact with the upper surface 97a of the connecting member 97. And the connecting member 97 become larger (FIG. 7C). A tool such as a wrench is connected to the rotating shaft 90. Therefore, when the rotary shaft 90 is rotated in the direction of the arrow cw in the clockwise direction by a tool such as a wrench, the middle die 60 is operated to be narrowed, and the outer peripheral side surface 80a of the flat cam 80 abuts against the upper surface 97a of the connecting member 97. The distance between the rotating shaft 90 and the connecting member 97 when contacting is increased (see FIG. 7C). Further, when the rotary shaft 90 is rotated in the direction of the arrow ccw in the left rotation direction with a tool such as a wrench, the middle die 60 returns to its original size, and the outer peripheral side surface 80a of the flat cam 80 is connected to the connecting member 97. The distance between the rotating shaft 90 and the connecting member 97 when contacting the upper surface 97a is reduced (see FIG. 9D).

  FIG. 11 is a diagram illustrating a planar cam 80 used in the present embodiment. In the present embodiment, a substantially semi-disc-shaped cam (FIG. 11A), a mushroom-shaped cam (FIG. 11B), a disk cam (FIG. 11C), and the like are applied. According to this embodiment, the plane cam 80 and the roller 97 are interposed between the base 20 and the middle mold 60, so that the middle mold 60 moves up and down smoothly, and impacts and vibrations occur during demolding work. It is difficult to get on the side groove block 200. Further, during the operation of returning the middle mold to the original position, impact and vibration are not easily applied to the middle mold, and there is no fear of damaging the middle mold. Then, by fixing the planar cam 80 coaxially so that it can be attached to and detached from the rotary shaft 90, the outer peripheral size of the planar cam 80 can be adjusted to the shape of the side groove block 200, the inner periphery, and the outer periphery It becomes easy to appropriately replace those having different shapes.

FIG. 6 is a flowchart showing a procedure for producing a concrete product by the mold apparatus 1 of the present invention. The concrete product manufacturing procedure shown in FIG. 6 (a) is a step S1 in which ready-mixed concrete is placed between a predetermined outer mold and a middle mold and cured, and the left and right side frames and the rear frame are opened. A step S2 for raising the concrete product higher than its demolding position by the lifting means, a step S4 for narrowing the middle mold with the concrete product raised, and a step S45 for lowering the concrete product to the demolding position. And a step S5 of extracting the concrete product from the middle mold 60.
FIG. 6B is obtained by changing a part of the process of FIG. The concrete product manufacturing procedure shown in FIG. 6B is a process S1 in which ready-mixed concrete is placed between a predetermined outer mold and a middle mold and cured to form, and the left and right side frames and the rear frame are opened. From the step S2, the step S32 of raising the concrete product to the same height as the demolding position by the lifting means, the step S4 of narrowing the middle mold with the concrete product raised, and the step S5 of pulling out the concrete product from the middle mold Become.
Here, the demolding position of the concrete product is a height position at which the concrete product is pulled out from the middle mold 60.

The manufacturing procedure of the concrete product by the formwork apparatus 1 of the present invention will be described below with reference to the flowchart shown in FIG. FIG. 7 is a front view showing the operation of the formwork apparatus 1 of the present embodiment. In this embodiment, the side groove block 200 is molded with its upper surface facing downward. This is because the side groove block 200 having a smooth surface and a small roughness coefficient is formed without a step by making the surface with which the upper surface of the middle mold 60 is in contact with the lower surface of the water channel.
First, ready-mixed concrete is placed and cured between a predetermined outer mold (formed by the front frame 50, the left and right side frames 30, 30, the rear frame 40, and the base 20) and the middle mold 60. (S1 in FIG. 6, FIG. 1). The lower sides of the side frames 30, 30, the rear frame 40, and the front frame 50 are hinged to the base 20 (see FIG. 1, FIG. 5, etc.), and the side frame 30, 30 and the upper locking member of the rear frame 40 are removed, and the side frames 30, 30, the rear frame 40, and the front frame 50 are opened (S2 in FIG. 6, FIG. 2). Then, the crane apparatus 100 is attached to the lower surface 200a (upper side in FIG. 2) of the side groove block 200. The crane apparatus 100 includes a lifting wire 101 with a hook and a suction machine 102 equipped with a vacuum pump. The suction head of the suction machine 102 is attached to the lower surface 200a of the side groove block 200 and is evacuated by a vacuum pump. The side groove block 200 is raised or lowered by the lifting wire 101 with the hook (FIG. 5).

  In the molding state of the side groove block 200, the height dimension from the ground contact surface E (the EE line in FIG. 7A) of the mold apparatus 1 to the surface 200a of the side groove block 200 is U1, and the side groove block 200 is. Assuming that the height dimension up to the demolding position F (line FF in FIG. 7A) is H1, the height dimension H1 is larger than the height dimension U1 (H1> U1).

  Next, the side groove block 200 is raised higher than the demolding position F by the crane device 100 with the middle die 60 still in the side groove block 200 (S31 in FIG. 6A, FIG. 7B). . As a result, the side groove block 200 rises from the base 20 by a predetermined height T1, and the surface 220c of the side groove block 200 is detached from the base 20. When the side groove block 200 is raised higher than the demolding position F in the crane device 100, the height dimension from the ground contact surface E to the surface 200a of the side groove block 200 becomes U2, and the height dimension U2 is higher than the height dimension H1. (U2> H1).

  Next, with the side groove block 200 kept raised, the rotary shaft 90 is rotated in the direction of the arrow cw in the clockwise direction to cause the middle die 60 to perform a narrow operation (S4 in FIG. 6A). When the middle mold 60 is narrowed, a gap is formed between the middle mold 60 and the inner side 200d of the side groove block 200, and the middle mold 60 descends by its own weight to a position where it contacts the lower side of the inner side 200d of the side groove block 200 (FIG. 7 (c)). At this time, the gap between the upper outer peripheral surface 61a of the middle die 61 and the upper outer peripheral surface of the inner groove 200d inside the side groove block 200 is S1, and the outer peripheral surface 80a1 on the maximum radius C1 side of the flat cam 80 and the upper surface 97a of the connecting member 97. Is set to be larger than the gap S2 (S1> S2). The gap S2 is set equal to the value obtained by subtracting the height dimension H1 from the height dimension U2 (S2 = U2-H1).

  Next, the side groove block 200 is lowered to the demolding position F (S45 in FIG. 6A). That is, the outer peripheral surface 80a1 on the maximum radius C1 side of the flat cam 80 coaxially fixed to the rotating shaft 90 and the upper surface 97a of the connecting member 97 come into contact with each other until the rotating shaft 90 is positioned above the lifting mechanism 70. The concrete product will be lowered (FIG. 7 (d)). At this time, the gap between the upper outer peripheral surface 61a of the middle mold 61 and the upper outer peripheral surface of the inner side 200d of the side groove block 200 is S3, and the clearance S3 is a value obtained by subtracting the clearance S2 from the clearance S1 (S3 = S1− S2). Accordingly, a gap is formed between the middle mold 60 and the substantially entire circumference of the side groove block 200, and the side groove block 200 is pulled out from the middle mold 60 (S5 in FIG. 6A).

  According to the present embodiment, when the concrete product 200 is lifted by the crane device 100 so as to be higher than the demolding position F (the height position at which the concrete product 200 is pulled out from the middle mold 60), the rotary shaft is rotated by a tool such as a wrench. 90, the concrete product 200 is simply lowered to a position positioned above the elevating mechanism 70 by abutting the outer peripheral surface of the flat cam 80 coaxially fixed to the rotating shaft 90 with the outer peripheral surface of the roller 97. With this simple operation, a gap is formed almost entirely around the concrete product 200, and the concrete product 200 can be pulled out from the middle mold.

Next, the manufacturing procedure of the concrete product by the formwork apparatus 1 of the present invention will be described below along the flowchart shown in FIG. In addition, about the process same as above-mentioned Fig.6 (a), description is abbreviate | omitted partially by giving the same code | symbol. FIG. 8 is a front view showing the operation of the formwork apparatus 1 of the present embodiment.
First, ready-mixed concrete is placed between a predetermined outer mold and a middle mold and cured and molded (S1 in FIG. 6). After the side groove block 200 is molded, the upper side of the side frames 30 and 30 and the rear frame 40 is formed. The locking members are removed, and the side frames 30, 30 and the rear frame 40 are opened (S2 in FIG. 6). Then, the crane apparatus 100 is attached to the lower surface 200a (upper side in FIG. 2) of the side groove block 200.

  In the molded state of the side groove block 200, the height dimension from the ground contact surface E (the EE line in FIG. 8A) of the mold apparatus 1 to the surface 200a of the side groove block 200 is U1, and the side groove block 200 is used. Assuming that the height dimension up to the demolding position F (line FF in FIG. 8A) is H1, the height dimension H1 is larger than the height dimension U1 (H1> U1).

  Next, the side groove block 200 is raised to the same height as the demolding position F in the crane apparatus 100 with the middle mold 60 still in the side groove block 200 (S32 in FIG. 6A, FIG. 8B). ). As a result, the side groove block 200 rises from the base 20 by a predetermined height T3, and the surface 220c of the side groove block 200 is detached from the base 20. When the side groove block 200 is raised to the same height as the mold release position F in the crane apparatus 100, the height dimension from the ground contact surface E to the surface 200a of the side groove block 200 becomes U2, and the height dimension U2 is the height dimension H1. (U2 = H1).

  Next, with the side groove block 200 kept raised, the rotary shaft 90 is rotated in the direction of the arrow cw in the clockwise direction to cause the middle die 60 to perform a narrow operation (S4 in FIG. 6A). When the middle mold 60 is narrowed, a gap is formed between the middle mold 60 and the inner side 200d of the side groove block 200, and the middle mold 60 descends by its own weight to a position where it contacts the lower side of the inner side 200d of the side groove block 200 (FIG. 8 (c)). At this time, a gap between the upper outer peripheral surface 61a of the middle die 61 and the upper outer peripheral surface of the inner side 200d of the side groove block 200 is defined as S1. The flat cam 80 has a maximum radius C1 side away from the upper surface 97a of the connecting member 97. Subsequently, when the rotating shaft 90 is rotated in the direction of the arrow cw in the clockwise direction, the outer peripheral surface 80a1 on the maximum radius C1 side of the flat cam 80 fixed coaxially to the rotating shaft 90 comes into contact with the upper surface 97a of the connecting member 97. Thus, the middle mold 60 is lifted to a position where the rotary shaft 90 is positioned above the lifting mechanism 70 (FIG. 8D). At this time, the gap between the upper outer peripheral surface 61a of the middle die 61 and the upper outer peripheral surface of the inner side 200d of the side groove block 200 is S3, and the gap S3 is smaller than the gap S1 (S3 <S1). Accordingly, a gap is formed between the middle mold 60 and the substantially entire circumference of the side groove block 200, and the side groove block 200 is pulled out from the middle mold 60 (S5 in FIG. 6B).

  According to this embodiment, if the concrete product 200 is lifted by the crane device 100 so as to be at the same height as the demolding position F (the height position at which the concrete product 200 is pulled out from the middle mold 60), it is rotated by a tool such as a wrench. By rotating the shaft 90 and bringing the outer peripheral surface of the flat cam 80 coaxially fixed to the rotating shaft 90 and the outer peripheral surface of the roller 97 into contact with each other, the entire circumference of the concrete product 200 can be obtained. A gap is formed over the concrete product 200, and the concrete product 200 can be pulled out from the middle mold 60.

  FIG. 9 shows an operation of returning the middle mold 60 to the original state after the concrete product 200 is pulled out from the middle mold 60. According to the present embodiment, the middle die 60 is rotated in the direction of the arrow ccw in the left rotation direction in a state where the outer peripheral surface 80a of the flat cam 80 coaxially fixed to the rotation shaft 90 is in contact with the upper surface 97a of the roller 97. Is restored to its original state, it is difficult for impact and vibration to be applied to the middle mold 60 during work, and there is no fear of damaging the middle mold 60. Further, the flat cam 80 is detachably coaxially fixed to the rotating shaft 90, so that the shape and size of the outer periphery of the flat cam 80 are different according to the shape and size of the inner periphery and outer periphery of the concrete product. It is possible to prepare them and replace them as appropriate.

  In the above-described embodiment, the lower side of the front frame 50 is hinged to the base 20, but the front frame 50 may be detachably attached to the base 20. More specifically, if the front frame 50 is attached from above the base 20 by insertion or fitting, the front frame 50 is removed from the base 20 when the side groove block 200 is floated from the base 20. Therefore, the middle mold 60 can be raised together with the front frame 50, and the raised height of the middle mold 60 is not limited to the front frame 50.

  In the above-described embodiment, the elevating mechanism 70 includes the flat cam 80. However, for example, the elevating mechanism 70 may be a toggle mechanism, a crank mechanism, a pantograph mechanism, a link mechanism, a hydraulic jack, a screw, or the like.

  The formwork apparatus for molding a concrete product of the present invention is not limited to the above-described embodiment. For example, the lateral groove block 200 has a substantially rectangular cylindrical shape, and a pavement tile pattern is integrally formed on the upper surface 200c. An embodiment in the case of manufacturing a side groove block (FIG. 12B) that is formed in the upper surface 200 c and has no water collecting groove formed on the upper surface 200 c is a formwork device 11 shown in FIG. 10. Here, FIG. 10A shows a state immediately before the side groove block 200 is lifted, and FIG. 10B shows a state where the side groove block 200 is lifted.

  As described above, the present invention is not limited to the embodiment described above. For example, after the concrete product 200 is lifted by the crane device 100, the lower side of the concrete product 200 may be received by a forklift and moved to the rear of the formwork device 1 and pulled out from the middle die 60. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

1,11 Formwork device 20 for concrete product molding
30 side frame,
40 Rear frame,
50 front frame,
60 Medium,
70 lifting mechanism,
80 plane cam,
90 axis of rotation,
100 crane equipment,
200 Concrete products (blocks for side grooves)

Claims (5)

Left and right side frames that form the outside of a concrete product such as a side groove block, front and rear frames, a middle mold that forms the inside of the concrete product, and a frame that is disposed on the front side of the middle mold and supports the middle mold And a narrowing mechanism that narrows the middle mold, and a lifting mechanism that is arranged on the front side of a base and moves the middle mold up and down while keeping the base parallel to the middle mold. A rotating shaft connected to the frame and a link mechanism for narrowing the middle mold in conjunction with the rotating shaft are provided. A connecting member having a predetermined shape is arranged above the lifting mechanism. A mold apparatus for molding a concrete product, characterized in that the rotary shaft can be positioned at a predetermined height above the lifting mechanism. Arms having a predetermined length are extended downward from the frame, and a plurality of pairs of guide rollers sandwiching the front and rear of the arms are arranged on the lifting mechanism, and the middle mold is cantilevered. The formwork device for molding a concrete product according to claim 1, wherein the mold device can be moved up and down . It said connecting member is a flat cam, formwork device that concrete products for molding according to claim 1 or 2, wherein which is fixed coaxially to the rotating shaft. A demolding position for molding a concrete product using the formwork device for molding a concrete product according to any one of claims 1 to 3, and pulling out the concrete product from a middle mold of the formwork device by lifting means such as a crane. The middle mold is narrowed by lifting the rotary shaft of the mold apparatus with a tool such as a wrench and lifting it to a position equal to or higher than the same height, and the rotary shaft is moved to the mold apparatus. A concrete product manufacturing method, wherein the concrete product is pulled out from the middle mold in a state where the concrete product is positioned at a predetermined height above the lifting mechanism. The concrete product has an upper surface formed with a protrusion such as a curb or an uneven pattern such as a paving tile pattern, or the concrete product has a part or all of its upper surface connected, 5. The product according to claim 4, wherein the product is molded with its upper surface facing downward, and the concrete product thus formed is detached from the base of the formwork apparatus, and then pulled out from the middle mold of the formwork apparatus. A method for manufacturing concrete products.

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