JP6931232B2 - Formwork equipment for molding concrete products and manufacturing methods for concrete products - Google Patents

Description

The present invention relates to a formwork device for molding concrete products such as weed-proof blocks, and a method for manufacturing concrete products.

The boundary block is a concrete block installed at the boundary between the road and the sidewalk or at the boundary between the road and the median strip, but conventionally, the gap between the road and the boundary block (or the median strip and the boundary block) is It was a vertical joint, and weeds were growing from everywhere. Therefore, the growth of weeds was suppressed by using a concrete product called weed control block A as shown in FIG.

The weed-proof block A has a recess D formed over the entire length in the longitudinal direction of the outer peripheral surface A1 which is the boundary b between the road R and the weed-proof block A. As a result, it is a surface that opposes phototropism and geotropism (Fig. 9). There is a gap between the road R and the boundary b of the weed control block A, and when weed seeds germinate, the roots try to grow downward toward the underground U, but the recess D causes the path to grow upward during growth. Because it can be changed, it cannot grow and withers. In addition, the buds try to grow upward toward the sun, but because they can change their course downwards during growth, they cannot grow and die. In this way, the recess D exerts a weed-proof effect.

A mold for molding such a weed-proof block A usually has a core (convex portion) for molding a concave portion D in the weed-proof block A on a mold side wall (side frame) (Patent Document 1). , 2). Since this core must have an inclination angle and length that are effective for weed control, when the formwork is opened and the weed control block is removed after molding, the side frame (side frame) of the formwork is rotated to remove the formwork. Attempting to do so causes the inner surface of the recess D of the weed control block A to interfere with the outer surface of the core, making it difficult to remove the mold. Therefore, conventionally, the following various measures have been taken to remove the core.

In Patent Document 1, a pin 30 is projected from the inner surface of the mold 1, and the core 20 is supported by the pin 30 to form a recess having a weed-proof structure. However, the work efficiency is low because the core 20 is attached and detached each time it is molded.

Patent Document 2 proposes a mold 10 having a movable link 17 pivotally supported by a support link 19 and having a core 15 at the free end of the movable link 17 (FIGS. 2 to 5). In this formwork 10, first, the core 15 is inserted and removed by rotating the movable link 17 with the pivot 18 as the rotation axis. Since it is difficult to remove the mold simply by removing the core 15, the side wall 10a is opened and removed by rotating the side wall 10a with the pivot 11 as the rotation axis (FIG. 2).

Japanese Patent No. 5271101 Japanese Patent No. 5650591

However, in FIGS. 2 to 5 of Patent Document 2, the work efficiency is low because the core 15 and the side wall 10a cannot be opened simultaneously to separate the weed control block. The side wall 10a requires an opening 12 for inserting and removing the core 15 first after molding. Therefore, the side wall 10a is divided into two (a side wall 10a on the side wall 10c side and a side wall 10a on the side wall 10d side), resulting in an unreasonable configuration in the molding process. For example, in order to insert and remove the core 15 from the side wall 10a, it is necessary to provide a predetermined gap at the boundary (sliding contact portion) between the core 15 and the opening 12 so that the core 15 and the opening 12 do not come into contact with each other. .. However, if this is done, concrete leakage or burrs are likely to occur at the boundary between the core 15 and the opening 12 during molding. In order to prevent this, the same problem occurs even if a sealing member (packing) is attached to the boundary between the core 15 and the opening 12. That is, if the seal member is brought into close contact with the core 15 in order to prevent leakage and burrs, it becomes difficult to insert and remove the core 15 from the side wall 10a.

Therefore, an object of the present invention is to simultaneously and integrally open a core that is difficult to insert and remove after molding and a side wall (side frame) for molding concrete into a flat shape to demold the concrete product. It is an object of the present invention to provide a formwork device for product molding and a method for manufacturing a concrete product.

In the formwork device for molding concrete products of the present invention, a formwork composed of a front frame, a rear frame, a side frame and a bottom frame is arranged on a base, and the side frame that rotates about a rotation axis is provided. It is a formwork device for molding concrete products.
The side frame is for providing a side frame surface for molding concrete into a flat shape and a concave portion diagonally downward toward the outer peripheral surface which is a rectangular side surface of concrete having a rectangular portion. The side frame surface is provided with a core which is an obliquely upward convex portion fixed at a predetermined angle corresponding to the concave portion of the rectangular side surface.
The height position of the rotation axis is located above the height position of the orthogonal surface orthogonal to the side frame surface at the height position of the upper end side of the side frame surface, which is the upper end side of the side frame surface . It is located outside the side frame surface with respect to the bottom frame.
The side frame is open upward from the bottom to the top with the rotation axis as the center.
The formwork device for molding concrete products of the present invention is a formwork device for molding concrete products with the upper surface facing downward, and the side frame surface molds concrete into a flat surface. It has a flat surface for concrete concrete and a convex portion fixed to the flat surface, and the convex portion is an angle formed by the side frame surface and the upper surface of the convex portion and an angle formed by the side frame surface and the lower surface of the convex portion. However, it is characterized in that it is 0 ° to 90 °.
The formwork device for molding concrete products of the present invention is a formwork device for molding concrete products with the upper surface facing downward, and the side frame surface molds concrete into a flat surface. The concrete has a flat surface and a convex portion fixed to the flat surface, and the convex portion includes an angle formed by the side frame surface and the upper surface of the convex portion, and the side frame surface and the lower surface of the convex portion. The angle formed by the concrete is 0 ° to 70 °, and the side frame opens upward.
In the present invention, the "angle formed by the side frame surface and the upper surface of the convex portion" means the angle formed by the side frame surface and the upper surface of the convex portion, whichever is the acute angle. As shown in FIG. 8, it is an angle α formed by the side frame surface 33 and the convex portion upper surface 332a. In the present invention, the "angle formed by the side frame surface and the lower surface of the convex portion" means the angle formed by the side frame surface and the lower surface of the convex portion, whichever is the acute angle. As shown in FIG. 8, it is an angle β formed by the side frame surface 33 and the convex portion lower surface 332b. In the present invention, "continuously" means that they are integrally and continuously connected in an inseparable state. In the present invention, "upward opening" is an opening method similar to opening a calendar hung on a wall, and means that a rotation axis is placed above an object to be opened upward and the calendar is opened from the lower side to the upper side. do. For example, "the side frame opens upward" means that the side frame opens from the bottom to the top around the axis of rotation.
Conventionally, in a formwork device for molding a weed-proof block, even if a rotation shaft is provided under the side frame of the formwork and the side frame is rotated to open after molding, the side frame has phototropism or bending as a weed-proof structure. Since there is a convex part (core) with a surface that opposes the earth, the convex part (core) interferes with the rotation trajectory centered on the rotation axis, and the side frame and the convex part (core) are integrated. It was difficult to pull it out. More specifically, as shown in FIG. 8, the convex portion is formed by the upper surface of the convex portion in which the angle formed by the side frame surface and the upper surface of the convex portion is 0 ° to 90 °, or the upper surface of the convex portion formed by the side frame surface and the lower surface of the convex portion. When having a convex lower surface having an angle of 0 ° to 90 °, it was difficult for such a formwork device for molding concrete products to pull out the side frame and the convex portion integrally because a draft was not formed. ..
According to the present invention, even in a concrete product such as a weed-proof block, the rotation axis can be arranged at a position where the core can be removed. Therefore, after molding, the side frame and the core can be rotated integrally at the same time and pulled out from the concrete product. As a result, the work efficiency is improved and the sealing accuracy at the time of molding is also improved.

The formwork device for molding a concrete product of the present invention is characterized in that the rotating shaft is located outside the side frame surface with respect to the bottom frame, and the side frame opens upward.
The method for manufacturing a concrete product of the present invention is a method for manufacturing a concrete product in which the concrete product is molded with its upper surface facing downward, and is a flat surface for molding concrete into a flat surface and a convex surface fixed to the flat surface. The rotation axis of the side frame having the side frame surface having the portions continuously is aligned with the orthogonal plane orthogonal to the side frame surface at the height position of the upper end side of the side frame surface, which is the upper end side of the side frame surface. The concrete product is made after the rotation axis is set to a position outside the side frame surface with respect to the bottom frame, and the side frame is rotated around the rotation axis to open upward. It is characterized in that it is pulled out upward to remove the mold.
In the present invention, "the rotating shaft is located outside the side frame surface with respect to the bottom frame" means that the rotating shaft is located outside (far) from the side frame surface with respect to the bottom frame. It means that it is.
According to the present invention, by positioning the rotation axis as described above, when the side frame is rotated around the rotation axis and opened upward, the entire side frame including the position of the upper end of the side frame surface is displaced outward. do. That is, the mold for molding a concrete product of the present invention has a gap for pulling out the concrete product upward and removing the mold in a state where the side frame is rotated about the rotation axis and opened upward. .. Therefore, after molding, when the concrete product is pulled upward and removed from the mold, the concrete product and the side frame do not come into contact with each other, and the concrete product can be easily removed from the mold.
Further, in the formwork device in which the side frame opens downward (the side frame of the formwork opens downward), the side frame rotates in the direction of the operator due to the weight of the side frame when the side frame is opened downward. There was a possibility of falling.
According to the present invention, since the side frame opens upward, the side frame does not fall in the direction of the operator when the side frame is opened, and the side frame rotates toward the center of the formwork when the side frame is closed. It is safe to do.

In the formwork device for molding concrete products of the present invention, a formwork composed of a front frame, a rear frame, a side frame and a bottom frame is arranged on a base, and the side frame that rotates about a rotation axis is provided. It is a formwork device for molding concrete products.
The side frame is provided with a side frame surface for molding concrete into a flat shape and a concave portion on the side surface of the concrete, and has a convex portion fixed to the side frame surface at a predetermined angle, and stands on a base. Is arranged, the stand is arranged outside the side frame with respect to the bottom frame, and the side frame is fixed to the stand so as to open upward from the lower side with the rotation axis as the center. It is characterized by being.
According to the present invention, since the stand is located outside the side frame, the side frame is in contact with the stand even when the side frame is rotated when the mold is opened, and the side frame is in contact with the operator. The chances are low. Therefore, you can work safely.

According to the present invention, a core that is difficult to insert and remove after molding (for example, a core used for molding a concrete product for weed control) and a side wall (side frame) for molding concrete into a flat surface are provided. It is possible to provide a formwork for molding a concrete product and a method for manufacturing the concrete product, which can be simultaneously opened integrally to remove the concrete product. As a result, the work efficiency is improved and the structure is rational in the molding process. For example, since an opening for inserting and removing the core is not required for the side wall (side frame), leakage and burrs are less likely to occur, and the sealing accuracy is improved. In addition, the operator can work safely when opening or closing the mold.

It is a perspective view which shows the formwork apparatus for molding a concrete product of embodiment of this invention. It is a top view which shows the formwork device for molding a concrete product of this embodiment. It is a front view which shows the formwork device for molding the concrete product of the said embodiment. It is sectional drawing of the formwork apparatus which shows the state which the side frame is closed in the said embodiment. It is sectional drawing of the formwork apparatus which shows the state which opened the side frame in the said embodiment. It is sectional drawing of the formwork apparatus which shows the state which opened the side frame in the said embodiment. It is sectional drawing of the formwork apparatus which shows the state which opened the side frame in the said embodiment. It is an enlarged view of the main part of the formwork device which shows the state which opened the side frame in the said embodiment. It is a side view which shows the weed control block.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Concrete products)
As shown in FIG. 9, in the concrete product molded by the formwork device 100 for molding the concrete product of the present embodiment, when the concrete product is installed on the road, the inner upper surface D1 and the inner lower surface D2 of the recess D are formed of the recess D. It is a concrete product having an inclined surface that inclines downward toward the innermost portion D3, and has a shape having a protruding portion A2 in which the center of the upper portion protrudes along the longitudinal direction of the concrete product (FIG. 9). The angle formed by the inner upper surface D1 and the inner lower surface D2 and the lower outer peripheral surface A11 of the concrete product (the outer peripheral surface of the outer peripheral surface A1 below the opening of the recess D) is an acute angle. That is, when the inclination angle of the lower outer peripheral surface A11 is 0 °, the angle formed by the inner upper surface D1 and the lower outer peripheral surface A11 and the angle formed by the inner lower surface D2 and the lower outer peripheral surface A11 are 0 ° to 90 °. Is the range of. Such concrete products include, for example, weed control block A. The weed-proof block A needs to have a surface having phototropism and ground bending in its recess. Therefore, the angle formed by the inner upper surface D1 and the lower outer peripheral surface A11 and the angle formed by the inner lower surface D2 and the lower outer peripheral surface A11 are preferably in the range of 0 ° to 70 °. Further, the length of the inclined surface from the concave opening to the innermost portion D3 is preferably 5 cm or more.

(Embodiment of the present invention)
FIG. 1 is a perspective view showing a formwork device 100 for molding a concrete product in a state where the side frame is closed in the present embodiment. FIG. 2 is a plan view showing a formwork device 100 for molding a concrete product according to the present embodiment. The formwork device 100 of FIGS. 1 and 2 is shown in a state in which the front frame 1, the rear frame 2, and a pair of left and right side frames 3 (left side frame 3A, right side frame 3B) are closed. FIG. 3 is a front view showing a formwork device 100 for molding a concrete product according to the present embodiment. In the formwork device 100 of FIG. 3, the rear frame 2 and the left and right side frames 3A and 3B are shown in a closed state, and the front frame 1 is shown in both open and closed states by arrows. FIG. 4 is a cross-sectional view of the formwork device 100 showing a state in which the side frames 3A and 3B are closed in the present embodiment. FIG. 5 is a cross-sectional view of the formwork device 100 showing a state in which the side frames 3A and 3B are opened in the present embodiment.

<Structure of Formwork Device 100 of the Present Invention>
The formwork device 100 for molding a concrete product of the present invention is a device for molding a concrete product A (FIG. 9) in which a recess for weed control is formed, and as shown in FIGS. The stand 6 and the formwork (front frame 1, rear frame 2, side frames 3A, 3B, bottom frame 4) are arranged therein. The formwork includes a front frame 1, a rear frame 2, side frames 3 (a pair of left and right side frames 3A and 3B), and a U-shaped bottom frame 4 shown in FIGS. The outside of the concrete product A is molded by these molds, and the upper side is smoothed with a trowel. Each formwork is made of steel plate.

The formwork device 100 for molding a concrete product of the present invention molds a concrete product A for weed control with its upper surface facing downward (FIGS. 4 and 5). That is, the concrete product A such as the weed-proof block is molded in an upside-down posture, which is upside down from the time when it is installed on the road. In the method of molding the upper surface of the concrete product A downward, since the upper surface smoothed with a trowel at the time of molding becomes the installation surface of the road, it is possible to form the concrete product A which is smooth without steps and has a small roughness coefficient. The description of the mold device 100 and the manufacturing method of the present invention in the vertical direction means the vertical direction at the time of molding.

The front frame 1 is used for molding the front side surface of the concrete product A, and the rear frame 2 is used for molding the rear side surface of the concrete product A (FIGS. 1 to 3). At the time of mold clamping, the front frame 1 and the rear frame 2 are closed to form the concrete product A, and at the time of mold opening, the front frame 1 and the rear frame 2 are opened and the concrete product A is taken out. .. The front frame 1 and the rear frame 2 are provided with a locking member (not shown) below so that the mold does not open when the mold is fastened, and the locking auxiliary member 1a for placing the rod-shaped locking member 10 on the front frame 1 and the rear frame 2. 2a is provided above (Figs. 1 to 3).

In the formwork device 100, a plurality of pairs of left and right stands 6 and 6 are erected on the base 5 at predetermined intervals along the longitudinal direction L (FIGS. 1 to 3). The side frames 3 (a pair of left and right side frames 3A and 3B) have support portions 31 provided with rotation shafts 310 above the outer side portions thereof (FIGS. 4 and 5). The support portions 31 of the left and right frames 3A and 3B are hinged to the upper edge portions 61 of the left and right stands 6 and 6 so as to hang, and are arranged on the side portions of the concrete product A and the bottom frame 4 (FIGS. 4 and 4). 5).

The left and right frames 3A and 3B are movable frames, and by turning the mold opening / closing member 7 shown in FIGS. , 5). The door-shaped opening operation of the side frames 3A and 3B is a so-called upward opening operation in which the side frames 3A and 3B open upward around the rotation shaft 310, and the door-shaped closing operation of the side frames 3A and 3B is a side. The frames 3A and 3B close downward around the rotation shaft 310. As described above, the formwork device 100 of the present invention includes side frames 3A and 3B that rotate around the rotation shaft 310, and the side frames 3A and 3B rotate in the lateral direction S of the concrete product A. It can be moved, and the mold opening and mold tightening are performed by the door-shaped opening / closing operation of the side frames 3A and 3B (FIGS. 4 and 5).

The bottom frame 4 is arranged on the base 5, and forms the lower part (upper part when installed on the road) of the concrete product A (FIGS. 4 and 5). The length of the bottom frame 4 in the longitudinal direction L has substantially the same length in the longitudinal direction L as the pair of left and right side frames 3A and 3B (FIG. 2). The bottom frame 4 has a U-shaped bottom portion 41 and is rounded so that the corners of the protruding portion A2 are rounded when the concrete product A is molded (FIGS. 4 and 5). A plurality of a pair of locking members 8 and 8 are provided along the longitudinal direction L of the mold device 100 on the outer portion 42 of the bottom frame 4 shown in FIGS. 4 and 5 (FIGS. 1 to 3). The locking members 8 and 8 are used to lock the lower portions of the left and right side frames 3A and 3B at the time of mold clamping (FIGS. 4 and 5).

The base 5 is a rectangular frame when viewed from above (FIGS. 1 and 2). Since the stand 6 is arranged on the base 5 having such a shape, it is unlikely that the operator will invade the inside of the frame of the base 5. Therefore, there is a low possibility that the worker will invade the range of motion of the side frame 3 (a position dangerous for the worker) when the side frame 3 is rotated, and the work is safe.

FIG. 6 shows the bottom frame 4, the pair of locking members 8, 8 and the base 5 extracted from the form device 100 in the state where the side frame 3 is opened in the present embodiment for explanation. It is a cross-sectional view. In FIG. 7, of the formwork device 100 in the state where the side frames 3A and 3B are opened in the present embodiment, the bottom frame 4, the base 5, the stand 6, and the side frames 3A and 3B are extracted for explanation. It is a cross-sectional view shown by. In FIGS. 6 and 7, the rear frame 2 is shown in a state of being opened toward the front.

The base end side 81 of the locking member 8 is axially fixed to the outer side portion 42 of the bottom frame 4, and the locking tip portion 82 and the locking lever 83 are provided at the other end (FIG. 6). On the other hand, locking projections 32 are provided below the outer side of the left and right side frames 3A and 3B (FIG. 7). When the side frames 3A and 3B are closed by the mold opening / closing member 7 shown in FIGS. 1 to 3, the locking tips 82 and 82 are locked to the locking projections 32 (FIGS. 6 and 7). ), Then the locking lever 83 is rotated to bring the left and right side frames 3A and 3B into close contact with the bottom frame 4 to prevent the outflow of concrete (FIGS. 4 to 7). A sealing member 84 such as a rubber packing is provided on the upper portion of the outer side 42 of the bottom frame 4 (positions where the left and right side frames 3A and 3B abut on the bottom frame 4) along the longitudinal direction L of the bottom frame 4. When the left and right side frames 3A and 3B are joined to the bottom frame 4, the sealing member 84 seals them to prevent the outflow of concrete (FIGS. 6 and 7). By arranging the side frame 3, the bottom frame 4, and the seal member 84 in this way, the seal member 84 is less likely to be damaged without an unreasonable load as in the conventional example.

The side frames (a pair of left and right side frames) 3A and 3B are provided with side frame surfaces 33 for molding concrete into a flat surface (FIG. 7). The side frame surface 33 continuously has a flat surface 331 for molding concrete into a flat surface and a convex portion (core) 332 fixed to the flat surface (FIG. 7). The side frame surface 33 (plane 331 and convex portion 332) and the trowel surface 35 may be combined, and in that case, as shown in FIG. 7, the formwork device is used as one L-shaped member when viewed from the side. It is integrally removable from 100.

FIG. 8 shows a formwork device in which the bottom frame 4, the stand 6, and the side frame 3 (3B) are extracted and shown in the present embodiment for the sake of explanation, and the side frame 3 (3B) is shown in an open state. It is an enlarged view of the main part of 100.

The height position of the rotation shaft 310 of the side frame 3 will be described with reference to FIG. The upper end side of the side frame surface 33 is defined as the upper end side 33a of the side frame surface. Then, among the surfaces orthogonal to the side frame surface 33, the surface orthogonal to the side frame surface 33 at the height position of the upper end side 33a of the side frame surface is designated as the orthogonal surface 34. In the present embodiment, the height position of the rotating shaft 310 is higher than the height position of the orthogonal plane 34. As described above, the height position of the rotation axis 310 is from the height position of the orthogonal surface 34 orthogonal to the side frame surface 33 at the height position of the side frame surface upper end side 33a which is the upper end side of the side frame surface 33. Is also located above.

Next, the plane position of the rotating shaft 310 will be described with reference to FIG. With the mold closed, the plane position of the rotating shaft 310 is located relatively outside the plane position of the upper end side 33a of the side frame surface of the side frame surface 33 when viewed from the bottom frame 4. In the case of the formwork device 100 for molding the symmetrical concrete product A, in the state where the mold is closed, the rotating shaft 310 is located on the upper end side 33a of the side frame surface of the side frame surface 33 with reference to the center line 4L of the bottom frame 4. It is located outside the plane position (Fig. 4). As described above, the plane position of the rotating shaft 310 is located outside the plane position of the side frame surface 33 with the bottom frame 4 as a reference (reference point).

The convex portion 332 has an angle α formed by the side frame surface 33 and the convex portion upper surface 332a and an angle β formed by the side frame surface 33 and the convex portion lower surface 332b of 0 ° to 90 ° (FIG. 8). Further, by configuring the rotation shaft 310 as described above, the convex portion 332 has an angle α formed by the side frame surface 33 and the convex portion upper surface 332a and an angle β formed by the side frame surface 33 and the convex portion lower surface 332b. Can also be 0 ° to 70 °. With the convex portion 332 having such an angle, it is possible to mold a concrete product A for weed control having a surface that opposes flexibility and bending property. Normally, in the case of such an angle, it is difficult to insert and remove the convex portion 332, and some ingenuity is required. It can be inserted and removed, and the side frame surface 33 can be a surface in which the flat surface 331 and the convex portion 332 are continuously formed and are integrally inseparable.

The stand 6 is arranged outside the side frame 3 of the formwork with the bottom frame 4 as a reference (FIG. 8). The stand 6 is arranged outside the side frame 3 when viewed from the bottom frame 4, and the side frame 3 is axially fixed so as to hang from the upper edge 61 of the stand 6. Therefore, when the mold is opened, the side frame 3 Touches the stand 6. In this way, the stand 6 makes it possible to limit the range of motion of the side frame 3. The possibility that the side frame 3 comes into direct contact with the worker is reduced, and the worker can work safely (FIG. 8).

Further, the stand 6 fixes the side frame 3 of the formwork so as to be open upward about the rotation shaft 310 (FIG. 8). Since the side frame 3 is fixed to the stand 6 so that it can be opened upward with the rotation shaft 310 as the center, the side frame 3 does not fall in the direction of the operator even when the side frame 3 is opened, and the side frame 3 is also opened. It is safe because the side frame 3 rotates in the direction of the bottom frame 4 even when the side frame 3 is closed.

<Manufacturing method of concrete product A using the manufacturing apparatus 100 of the present invention>
The case where the concrete product A having the outer peripheral surface A1 on which the recess D is formed, which is shown in FIG. 9, will be described by using the formwork device 100 of the concrete product A of the present embodiment. Here, as an example, the manufacturing process will be described from the state in which the formwork (front frame 1, rear frame 2, side frames 3A, 3B, bottom frame 4) is open. In the present embodiment, the concrete product A is manufactured by first closing the formwork, molding the concrete product A, opening the formwork again, and removing the concrete product A from the mold.

First, by rotating the mold opening / closing member 7 shown in FIGS. 1 to 3, the side frames 3A and 3B are closed downward around the rotation shaft 310 (FIG. 4). Then, the locking tip portions 82, 82 of the locking member 8 are locked to the locking projections 32 of the left and right side frames 3A, 3B, and the locking lever 83 is rotated upward to form the left and right side frames 3A, 3B. It is brought into close contact with the bottom frame 4. At this time, the contact portions between the left and right side frames 3A and 3B and the bottom frame 4 are firmly adhered to each other by the sealing member 84 provided on the bottom frame 4 in order to prevent the concrete from flowing out.

Next, by manually lifting the front frame 1 whose lower side is hinged, the front frame 1 is rotated upward to close, and the front frame 1 is locked by a lower locking member (not shown) (FIG. 1). , 2). Similarly, by manually lifting the rear frame 2 whose lower side is hinged, the rear frame 2 is rotated upward to close, and the rear frame 2 is locked by a lower locking member (not shown). After closing the front frame 1 and the rear frame 2 in this way, the rod-shaped locking member 10 is passed in the longitudinal direction L of the mold (FIGS. 1 to 3), and the locking member 10 is locked by the locking auxiliary member 1a. , 2a (FIG. 2), and by rotating the gripping lever 10a of the locking member 10, the front frame 1 and the rear frame 2 are further locked. Similar to the side frame 3, at the time of this mold clamping, the sealing member provided on the outer circumference in front of the bottom frame 4 fills the gap between the front frame 1 and the bottom frame 4, and is behind the bottom frame 4. A sealing member provided on the outer circumference fills the gap between the rear frame 2 and the bottom frame 4 (not shown). Molding is performed as described above.

Next, concrete is poured into the formwork device 100, and the upper surface of the concrete is smoothed with a trowel with reference to the trowel surface 35 shown in FIGS. The concrete is cured in place and molded. After curing, a concrete product A having a recess D formed on the outer peripheral surface, such as a weed-proof block, is molded in an upside-down posture. After molding the concrete product A in this way, the mold is opened in the reverse procedure of the mold clamping described above.

In the formwork device 100, when the side frame 3 provided with the side frame surface 33 is rotated around the rotation shaft 310 and opened upward, the rotation shaft 310 is positioned, so that the position of the upper end of the side frame surface 33 is positioned. The entire side frame 3 including the side frame 3 is displaced outward. As a result, a gap C is created for pulling out the concrete product A upward and removing the mold (FIG. 7).

Finally, the concrete product A molded in the upside-down posture is demolded by holding the end face portion of the concrete product A by using a demolding reversing machine (not shown) and pulling it upward to demold it, and rotating it 180 degrees. Then, the concrete product A is kept in a normal posture. Since there is the above gap C, the concrete product A and the side frame 3 do not come into contact with each other at the time of demolding, and the concrete product A can be easily demolded.

100 formwork device,
1 front frame,
2 rear frame,
3 (3A, 3B) side frame,
4 bottom frame,
5 bases,
6 stands,
7-inch opening and closing member,
8 Locking member,
33 side frame surface,
33a side frame surface upper edge,
34 Orthogonal plane,
310 rotating shaft,
331 plane,
332 Convex part (core),
α The angle formed by the side frame surface and the upper surface of the convex portion (the angle formed by the side frame surface and the upper surface of the convex portion, whichever is the acute angle: the angle formed by the side frame surface 33 and the upper surface of the convex portion 332a),
β The angle formed by the side frame surface and the lower surface of the convex portion (the angle formed by the side frame surface and the lower surface of the convex portion, whichever is the acute angle: the angle formed by the side frame surface 33 and the lower surface of the convex portion 332b).

Claims (6)

A formwork device for molding concrete products, which is provided with a formwork consisting of a front frame, a rear frame, a side frame, and a bottom frame on a base and the side frame that rotates about a rotation axis. hand,
The side frame is for providing a side frame surface for molding concrete into a flat shape and a concave portion diagonally downward toward the outer peripheral surface which is a rectangular side surface of concrete having a rectangular portion. The side frame surface is provided with a core which is an obliquely upward convex portion fixed at a predetermined angle corresponding to the concave portion of the rectangular side surface.
The height position of the rotation axis is located above the height position of the orthogonal surface orthogonal to the side frame surface at the height position of the upper end side of the side frame surface, which is the upper end side of the side frame surface . It is located outside the side frame surface with respect to the bottom frame.
A formwork device for molding concrete products, wherein the side frame can be opened upward from below with respect to a rotation axis. The concrete product has a substantially convex shape, and is a formwork device for molding the concrete product with the substantially convex upper surface facing downward, and the concrete product has the substantially convex shape facing downward. The formwork device for molding a concrete product according to claim 1, wherein the formwork device is located outside the side frame surface with respect to the bottom frame. A formwork device for molding concrete products, which is provided with a formwork consisting of a front frame, a rear frame, a side frame, and a bottom frame on a base and the side frame that rotates about a rotation axis. hand,
The side frame is for providing a side frame surface for molding concrete into a flat shape and a concave portion diagonally downward toward the outer peripheral surface which is a rectangular side surface of concrete having a rectangular portion, and is provided on the side frame surface. It has a core that is an obliquely upward convex part that is fixed at a predetermined angle.
A stand is arranged on the base, and the stand is arranged outside the side frame with respect to the bottom frame, and the side frame can be opened upward from the lower side about the rotation axis. A formwork device for molding concrete products, which is fixed to the stand. A formwork device for molding concrete products, which molds the concrete product with its upper surface facing downward.
The side frame surface, and a plane for molding concrete in a plane, and a core is a convex portion of the obliquely upward fixed to the plane, the core is slanting upward protrusions The angle formed by the side frame surface and the upper surface of the convex portion and the angle formed by the side frame surface and the lower surface of the convex portion are larger than 0 ° and smaller than 90 °, and the side frame is above the rotation axis from below. whether it is possible to open on opening toward or continuous said side frame surface, and a plane for molding concrete in a plane, and a core which is the oblique upward convex portion fixed to the plane In the core, which is the diagonally upward convex portion, the angle formed by the side frame surface and the upper surface of the convex portion and the angle formed by the side frame surface and the lower surface of the convex portion are larger than 0 ° and 70 ° or less. The mold device for molding a concrete product according to any one of claims 1 to 3, wherein the side frame can be opened upward from below with respect to a rotation axis. A manufacturing method for molding concrete products, wherein a formwork consisting of a front frame, a rear frame, a side frame, and a bottom frame is arranged on a base, and the side frame that rotates about a rotation axis is provided. ,
The side frame is for providing a flat surface for molding concrete into a flat surface and a concave portion diagonally downward toward the outer peripheral surface which is a rectangular side surface of concrete having a rectangular shape portion, and is fixed to the flat surface at a predetermined angle. It is provided with a side frame surface having a core which is an obliquely upward convex portion.
The rotation axis is located outside the plane position of the upper end side of the side frame surface of the side frame surface with reference to the center line of the bottom frame, and the height position of the rotation axis is the height position of the side frame surface. The height position of the upper end side of the side frame surface, which is the upper end side, is set higher than the orthogonal surface orthogonal to the side frame surface, and the rotation axis is outside the side frame surface with respect to the bottom frame. A concrete characterized in that, after molding the concrete product, the side frame is opened upward from the lower side about the rotation axis, and then the concrete product is pulled out upward to remove the mold. How to make the product. A manufacturing method for molding concrete products, wherein a formwork consisting of a front frame, a rear frame, a side frame, and a bottom frame is arranged on a base, and the side frame that rotates about a rotation axis is provided. ,
The side frame is for providing a flat surface for molding concrete into a flat surface and a concave portion diagonally downward toward the outer peripheral surface which is a rectangular side surface of concrete having a rectangular shape portion, and is fixed to the flat surface at a predetermined angle. It is provided with a side frame surface having a core which is an obliquely upward convex portion.
A stand is arranged on the base, and the stand is arranged outside the side frame with respect to the bottom frame, and the side frame can be opened upward from the lower side about the rotation axis. It is fixed to the stand, and after molding the concrete product, the side frame is opened upward from the lower side about the rotation axis, and then the concrete product is pulled out upward to remove the mold. How to manufacture concrete products.

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