JP2004358876A - Form unit for forming concrete product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form unit for forming a concrete product which enables reliable release of the inner wall surface of a water passage from an inner form and accurate horizontal pulling-out after the release, while simplifying the structure of the inner form. <P>SOLUTION: A frame-side positioning plate T15 projecting upward is fitted to a frame T2, while the inner form U forming the inner wall surface of the water passage 1 of a gutter block B1 is provided with a narrowing mechanism Uk which makes an outer peripheral plate U1 of the inner form U conduct narrowing motion in gearing with a rotating shaft Uj, and with an inner-form-side positioning plate U15 which is turned downward by the rotation of the rotating shaft Uj and comes into contact with the frame-side positioning plate T15. By using a carrying means 10 such as a crane which pulls out the gutter block B1 horizontally from the inner form U, the narrowing mechanism Uk is operated for release in a state wherein the inner form U is held together with the gutter block B1, and then the gutter block B1 is pulled out horizontally from the inner form U in a state wherein the inner-form-side positioning plate U15 and the frame-side positioning plate T15 are brought into contact with each other by the medium of a drain slit 3 of the gutter block B1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product forming apparatus including an inner frame and an outer frame for forming a concrete product such as a side groove block having a water passage inside and a drainage slit in the center thereof.
[0002]
[Prior art]
As a concrete product such as a gutter block having a water passage therein, as shown in FIG. 8A, a drainage slit 3 having a circular or rectangular water passage 1 and penetrating the water passage 1 and the upper surface 2. 8B, and as shown in FIG. 8B, there is a gutter block B2 of a type having no drainage slit (also called an O-type culvert). The drainage slit 3 is provided with a grating and serves to flow water such as a road through the waterway 3.
[0003]
In order to manufacture a concrete product such as the gutter block B1 having the water passage 3 therein, an inner frame (also referred to as a core) forming an inner wall surface of the water passage is provided in an outer frame forming an outer periphery of the concrete product. ) Is built upside down as a concrete product by the formwork device in which is incorporated. The inner frame is provided with a narrowing mechanism because the outer shape needs to be narrower than the hollow portion (water passage) at the time of demolding. Conventionally, the inner frame is extracted when the narrowing operation is performed by the narrowing mechanism. However, from the point of effective use of the manufacturing space, the concrete product is extracted without changing the position of the inner frame as shown in Patent Document 1. Structures have been developed. This is because, in a production line by transportation, since the formwork device is transported together with its peripheral devices, if only the inner frame is taken out, it is difficult to return the inner frame to the moved outer frame later.
[0004]
[Patent Document 1]
Japanese Unexamined Patent Publication No. Hei 6-134745 discloses a type of manufacturing a side groove block B2 of a type also called an O-type culvert shown in FIG. 8B (a type not having the drainage slit 3). As shown, an outer frame forming the outer peripheral surface of the concrete product is composed of a base frame 2 for forming a bottom surface, and side frames 3 and 4 for forming both side walls pivotally connected to the base frame 2 so that the lower part can be freely opened and closed. , An inner frame 9 forming an inner wall surface of the water passage 1 is pivoted upward on both sides of the upper mounting frame 10 and the upper mounting frame 10. Side mounting frames 11 and 12 which are freely attached to each other and are curved inward below each other, and lower mounting frames 13 each having an inverted trapezoidal cross section and connected to both lower ends of the side mounting frames 11 and 12 by arms. , Upper mounting frame 10 and outer mounting frames 11, 12 A support mechanism 24 is provided on the front frame 5 side to support the inner frame 9 horizontally and vertically so as to be able to move up and down. A screw rod 16 having a different screw direction is disposed on the frame 6 side, and the lower part is mounted via nuts 19 and 20 to nuts 17 and 18 screwed to the front frame 5 side and the rear frame 6 side of the screw rod 16 respectively. A concrete product with the frame 13 connected is formed.
[0005]
When removing the side groove block B2, after opening the side frames 3, 4 and the rear frame 6 on both sides facing each other, the screw rod 16 is rotated by a tool or the like, and the nuts 17, 18 screwed to the screw rod 16 are formed. Move in the directions away from each other, the links 19 and 20 are pulled, and the lower mounting frame 13 is raised. When the lower mounting frame 13 rises, the front ends of the side mounting frames 11 and 12 are drawn inward by the link 14, and a clearance is formed between the lower mounting frame 13 and the water passage 1 of the side groove block B <b> 2 by the raising of the support mechanism 24. Therefore, the concrete product is horizontally extracted along the longitudinal direction of the screw rod 16 using a transporting means such as a crane. Conventionally, a mold having a similar structure is used also in the case of a side groove block B1 having a water passage 1 inside and a drainage slit 3 in the center as shown in FIG.
[0006]
[Problems to be solved by the invention]
However, in the conventional mold apparatus of Japanese Patent Application Laid-Open No. 6-134745, after the narrowing mechanism is narrowed, the inner frame 9 is raised together with the product by the support shaft 23 on the front frame 5 side. In order to raise the support shaft 23 to the opposite side (toward the rear frame 6), a support shaft 23 that exerts a strong force and a support mechanism 24 that ensures the operation of the support shaft 23 are required. In addition, if the support shaft 23 and the support mechanism 24 that guarantees the operation are arranged on the opposite side, the support shaft 23 cannot be pulled out horizontally, and even if it is made, the formwork device becomes complicated and expensive. In addition, screw rods 16 having different screw directions on the front frame 5 side and the rear frame 6 side are disposed horizontally in the inner frame 9, and the screw rods 16 are screwed into the front frame 5 side and the rear frame 6 side, respectively. Since the structure in which the lower mounting frame 13 is connected to the nuts 17 and 18 via the links 19 and 20 is adopted, the structure of the inner frame 9 is complicated and expensive. That is, since the internal pressure of the poured concrete is applied to the inner frame 9, a large force is required to exert a force that overcomes the internal pressure in order to simultaneously reduce the overall size. In particular, when the inner frame is long, a strong effort is required to form all the gaps in the longitudinal direction.
[0007]
For this reason, in the conventional Japanese Patent Application Laid-Open No. 6-134745, it is not easy to release the gap between the inner frame and the product on the entire outer periphery by the link of the inner frame. When horizontally pulled out by a transporting means such as a crane, the concrete product is sometimes pulled out so as to be peeled off from the inner frame.
[0008]
In the case of a gutter block B1 having a water passage 1 inside and a drainage slit 3 in the center as shown in FIG. 8A, when the concrete product is horizontally pulled out from the inner frame by a conveying means such as a crane. In addition, the concrete product and the inner frame 9 cannot be pulled out horizontally to prevent blurring, and the drain slit portion is peeled off.
[0009]
Therefore, it is an object of the present invention to reliably release the inner wall surface and the inner frame of the water passage while simplifying the structure of the inner frame, and to accurately and horizontally withdraw the inner wall after the release. An object of the present invention is to provide a formwork apparatus for molding a concrete product.
[0010]
[Means for Solving the Problems]
The concrete frame forming apparatus according to claim 1 of the present invention comprises an inner frame and an outer frame for forming a concrete product such as a side gutter block having a water passage inside and a drain slit in the center with the drain slit facing downward. A concrete frame forming apparatus for forming a concrete product, comprising: an outer frame forming an outer periphery of a concrete product is composed of a side frame facing a base frame and front and rear frames facing the base frame, and protrudes upward from the base frame. A rotary shaft to which an operation handle is connected to an inner frame on which an underframe-side positioning plate is attached and which forms an inner wall surface of a concrete product water passage, a narrowing mechanism for narrowly operating an outer peripheral plate of the inner frame, and a rotary shaft. An inner frame side positioning plate that is turned downward and contacts the underframe side positioning plate is provided, and the concrete product is pulled out horizontally from the inner frame by using a crane or other transporting means. After releasing the mold by operating the narrowing mechanism while holding the inner frame together with the product, the concrete is removed from the inner frame with the inner frame side positioning plate and the underframe side positioning plate in contact with each other through the concrete product drain slit. The feature is that the product is pulled out horizontally.
[0011]
According to the present invention, not only when a concrete product is pulled out of a form by a conveying means such as a crane arranged at a work site, but also when a narrowing mechanism is narrowed, the conveying means such as a crane is used. That is, fresh concrete is poured into this formwork apparatus, and a concrete product such as a gutter block having a water passage therein is formed with its upper part facing downward (cured and hardened). When releasing the wall and the inner frame from each other, hold the outer periphery of the concrete product by a conveying means such as a crane, then rotate the rotating shaft with the operation handle to narrow the narrow mechanism to release from the inner frame, After the mold release, it may be pulled out horizontally by the same transporting means such as a crane as it is.
[0012]
According to a second aspect of the present invention, based on the first aspect, the narrowing mechanism is connected to the rotating shaft to narrow both lower sides of the inner frame. Equipped with a lower releasing means by a link, using a transport means such as a crane to horizontally pull out the concrete product from the inner frame, raise the inner frame together with the concrete product, operate the lower releasing means of the narrowing mechanism, After the side is released, the upper side is released by gravity lowering of the inner frame which has risen together with the concrete product.
[0013]
According to a third aspect of the present invention, based on the first aspect, the narrowing mechanism is connected to the rotating shaft to narrow both lower sides of the inner frame. Equipped with a lower releasing means by a link, using a transport means such as a crane to horizontally pull out the concrete product from the inner frame, raise the inner frame together with the concrete product, operate the lower releasing means of the narrowing mechanism, After releasing the side, then, when descending for releasing the upper side, through the state where the inner frame side positioning plate and the underframe side positioning plate are in contact via the drainage slit of the concrete product And lowering a distance shorter than the raised height distance.
[0014]
According to the second or third aspect of the present invention, the outer periphery of the concrete product is sandwiched and raised by a conveying means such as a crane, and then the rotation shaft is rotated by the operation handle to release the lower side of the narrowing mechanism. Activate the means to release the upper side. Next, according to the second aspect of the present invention, the lower side is released by gravity lowering of the inner frame which has risen together with the concrete product. On the other hand, in the invention according to claim 3, the inner frame is lowered together with the concrete product by using a conveying means such as a crane which horizontally pulls out the concrete product from the inner frame. When the plate and the plate are brought into contact with each other via the drainage slit of the concrete product, and a distance shorter than the raised height is lowered, the upper side of the inner frame is separated from the lower side by a releasing means such as a lower side releasing means. Although the mold means is not provided, the upper side of the inner frame and the upper side of the concrete product are separated from each other, and as a result, the entire circumference of the inner frame and the concrete product such as a gutter block having a water passage therein is provided. Release is performed. After being lifted for release, it may be pulled out horizontally by the same transporting means such as a crane as it is.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
(First Embodiment)
As shown in FIG. 8 (a), the formwork apparatus for forming a concrete product according to the present embodiment has a circular water passage 1 and a drain slit 3 through which the water passage 1 and the upper surface 2 penetrate. (Concrete product), which comprises an outer frame T forming the outer periphery of the gutter block B1 and an inner frame U forming the inner wall surface of the water passage 1 of the gutter block B1 ( 1 to 4). Further, a transporting means 10 such as a crane which is provided so as to be suspended at a factory or the like is used. In the manufacturing line of the side groove block B1 manufacturing plant, the description will be made on the assumption that the side groove block B1 is manufactured while the formwork apparatus is transported together with its peripheral devices.
[0017]
The conveying means 10 such as a crane is used not only for horizontally pulling out the gutter block B1 from the inner frame U but also for releasing the inner wall U from the inner wall surface of the water passage 1 of the gutter block B1. Concrete products such as gutter blocks are usually manufactured in indoor facilities such as factories. However, transport means 10 such as a crane that is suspended and moved from above in factories or the like is arranged and used. The transfer means 10 such as a crane has a holding portion 10a for holding the outer periphery of the concrete product at its lower end. By using the transporting means 10 such as a crane, the structure of the present formwork apparatus, in particular, the structure of the inner frame U can be simplified.
[0018]
The outer frame T of the present formwork apparatus includes a frame T2 installed on a base T1, side frames T3 and T4 having a lower end pivotally opposed to the base T1, and a lower end hinged to the base T1. The front frame (small plate) T5 and the rear frame (small plate) T6 are pivotally attached to each other to face each other. Although not shown, a fastener such as a clamp for fastening the side frames T3 and T4 from outside is attached to the outside of the opposed side frames T3 and T4. When the fastener is loosened, the opposed side frames T3 and T4 open right and left. When the side frames T3 and T4 open left and right, the front frame T5 and the rear frame T6 also open. The side frames T3, T4 and the rear frame T6 are provided with a stopper so that they open diagonally and do not fall down (full open state), but the front frame T5 falls down (FIG. 1).
[0019]
A projection 23 is provided at the center of the surface of the underframe T2, and an underframe positioning plate T15 is erected above the projection 23 via a fixing portion 24. The underframe positioning plate T15 is disposed so as to be inserted into the drain slit 3 of the side groove block B1, and when the side groove block B1 is pulled out horizontally from the inner frame U, the side groove block B1 and the inner frame U are shaken (right and left swinging). ) To prevent. The width of the underframe side positioning plate T15 is smaller than the width of the fixed portion 24.
[0020]
As shown in FIGS. 6 (a) and 6 (b), the inner frame U has an outer peripheral plate U1 having a notch in the lower center, vertical plates U3a and U3b arranged vertically at the notch, and an outer peripheral plate U1. It consists of a reinforcing rib U2 and the like provided inside. The reinforcing rib U2 is composed of an upper reinforcing rib U2a, and side reinforcing ribs U2b and U2c whose lower sides are connected to vertical plates U3a and U3b on both sides of the upper reinforcing rib U2a, and these are attached to the outer peripheral plate U1. . The inner frame U is provided with a narrowing mechanism Uk that makes the outer shape narrower than the water passage (hollow portion) 1 when the mold is removed. The narrowing mechanism Uk includes a rotating shaft Uj to which a T-shaped operation handle Uh is connected, and lower releasing means Us for narrowing the lower side of the inner frame U by a link in conjunction with the rotating shaft Uj. (FIGS. 4 and 5). The rotation shaft Uj is disposed so as to pass through substantially the center of the inner frame U horizontally, and the tip thereof is protruded outside of the inner frame U, and the operation handle Uh is attached. In the longitudinal direction of the rotation axis Uj, two reinforcing ribs U2 are arranged at three locations as a set, and a lower mold releasing means is provided between the two reinforcing ribs U2 and U2 on the front frame T5 side and the rear frame T6 side. Us are arranged. The lower side releasing means Us is constituted by a link located below the rotation axis Uj, and the shafts J3a and J3b at both ends are connected to the left and right side reinforcing ribs U2b and U2c facing each other, and the shaft J1 is attached at the center. ing. At the position of the lower release means Us on the rotation axis Uj, a rotation auxiliary shaft J2 for moving the central axis J1 of the lower release means Us downward is mounted along the rotation axis Uj. Therefore, when the rotation shaft Uj rotates, the rotation auxiliary shaft J2 moves the center shaft J1 of the lower mold release means Us downward, so that the shafts J3a and J3b at both ends of the link move upward. The left and right side reinforcing ribs U2b and U2c are drawn inward (inside the inner frame U), and the lower side of the outer peripheral plate U1 of the inner frame U is narrowed (diameter reduced). Further, the distance H between the vertical plate U3a and the vertical plate U3b is reduced by moving the shafts J3a and J3b at both ends of the lower mold release means Us upward.
[0021]
The narrowing mechanism Uk is also provided with an inner frame side positioning plate U15 attached to the rotation shaft Uj. The inner frame side positioning plate U15 comes into contact with the underframe side positioning plate T15 attached to the underframe T2, so that the inner frame side positioning plate U15 is supported below the inner frame side positioning plate U15. When the horizontal groove block B1 is pulled out horizontally, the lateral groove block B1 and the inner frame are prevented from being shaken (swaying from side to side). In the present embodiment, the inner frame side positioning plate U15 comes into contact with the underframe side positioning plate T15 when it is positioned below by the rotation of the rotation shaft Uj. Are set so that the center O2 of the water passage 1 of the side groove block B1 is higher than the center O1 of the outer peripheral plate U1 constituting the inner frame U (FIG. 7). That is, the side groove block B1 is raised together with the inner frame U, and the lower side of the inner frame U and the lower side of the side groove block B1 are separated by the lower side releasing means Us. By lowering the distance H2 shorter than the raised height distance H1 through a state where the underframe side positioning plate T15 is in contact with the side groove block B1 via the drainage slit 3, the upper side of the inner frame U. And the upper side of the side groove block B1 is released (FIG. 7).
[0022]
On the rear frame T6 side of the outer frame T, a support mechanism T7 is disposed. The support mechanism T7 is for supporting the inner frame U from the rear side, and plays a role of pulling the inner frame U from the rear when the side groove block B1 is pulled out using the transfer means 10 such as a crane. , A horizontal portion T7a, a vertical portion T7b, and an elevating portion T7c, and the tip of the horizontal portion T7a is connected to the reinforcing rib U2. Then, when the side groove block B1 moves up and down using the transporting means 10 such as a crane, the up-and-down section T7c allows this, and the vertical section T7b moves up and down.
[0023]
Next, a method of manufacturing the concrete gutter block B1 using the present formwork apparatus will be described. The side groove block B1 is formed with the drain slit 3 facing downward and the upper surface 2 facing downward. First, ready-mixed concrete is driven into the outer frame T assembled with the inner frame U inside (D) from above (FIG. 2). Reinforcing bars are arranged around the inner frame U, and the entire formwork device is vibrated by a vibrator to spread concrete in detail, and then dried and cured at room temperature or high temperature. Here, the state of the inner frame U with respect to the outer frame T when the ready-mixed concrete is driven is as shown in FIG. 9 by fixing the fixed portion 24 on the central convex portion 23 of the underframe T2 to the vertical plate U3a and the vertical plate U3b. Are supported by the underframe T2 in a state of being sandwiched, and the front and rear portions of the inner frame U in the longitudinal direction are sandwiched by the closed front frame T5 and the rear frame 6. After the internal curing period has elapsed and the concrete has hardened, the clamps for tightening the side frames T3 and T4 outside the opposing side frames T3 and T4 are loosened, and the opposing side frames T3 and T4 open right and left. When the side frames T3 and T4 open left and right, the front frame T5 and the rear frame T6 also open (FIG. 1).
[0024]
Then, the outer circumference of the side groove block B1 is nipped and raised by the nipping part 10a by using the transfer means 10 such as a crane (reference F1; FIG. 5A), and then the narrowing mechanism Uk is operated (see FIG. 4 (a)) The operation of the narrowing mechanism Uk at this time is performed to form a gap S1 on the lower side of the inner wall surface of the water passage 1 and to release the mold, that is, turn the operation handle Uh to rotate the rotation shaft Uj. When rotated in the clockwise direction, the rotation auxiliary shaft J2 attached to the rotation shaft Uj moves the center axis J1 of the link downward, and the inner frame side positioning plate U15 rotates right below (the drainage slit 3). The rotation auxiliary shaft J2 moves the center axis J1 of the link downward, and the shafts J3a, J3b at both ends of the link move upward, so that the lower side release means Us raises the left and right side reinforcing ribs U2b, U2c. By moving and being drawn inside the inner frame U, the lower side of the outer peripheral plate U1 is narrowed (reduced in diameter) to generate a gap S1.At this time, the interval H between the vertical plate U3a and the vertical plate U3b is narrowed. The vertical plate U3a and the vertical plate U3b initially sandwich the wide fixed portion 24. However, when the inner frame U is raised, the vertical plate U3a and the vertical plate U3b The distance H between U3a and vertical plate U3b is reduced.
[0025]
When the lower side S1 of the inner wall surface of the water passage 1 is released from the mold, the inner frame side positioning plate U15 is lowered by the transfer means 10 such as a crane to a position where the inner frame side positioning plate U15 comes into contact with the underframe side positioning plate T15 (reference F2; FIG. 5 (b)). The descent at this time is performed in order to create a gap S2 above the inner wall surface of the water passage 1 and to release the mold (FIG. 7). The position to be lowered at this time is a position where the inner frame side positioning plate U15 contacts the underframe side positioning plate T15, and this position is a position of a distance H2 shorter than the raised height distance H1 ( (FIG. 7). That is, the conveying means 10 such as a crane is lowered so that the center O1 of the circular water passage 1 of the side groove block B1 is slightly higher than the center O2 of the circumference of the outer peripheral plate U1 in contact with the upper reinforcing rib U2a. When the vertical plates U3a and U3b are lowered to this position, the distance H between the vertical plates U3a and U3b is reduced, and the underframe-side positioning plate T15 is sandwiched. The side groove block B1 can be pulled out from the inner frame U without coming into contact with the vertical plates U3a and U3b. Note that the side groove block B1 drawn horizontally is inverted by the reversing machine and placed in the normal posture.
[0026]
Next, when the side groove block B1 is pulled out from the inner frame U, it is necessary to lower the inner frame U to the original position. That is, it is necessary to provide a formwork device having an inner frame U inside an outer frame T in which concrete is driven. At this time, when the operation handle Uh is turned in the opposite direction (counterclockwise), the rotation shaft Uj is rotated in the counterclockwise direction, and the rotation auxiliary shaft J2 attached to the rotation shaft Uj moves the center axis J1 of the link upward. At the same time, the inner frame side positioning plate U15 rotates from directly below toward the original lateral direction. When the inner frame side positioning plate U15 faces in the horizontal direction, the state of contact with the underframe side positioning plate T15 is released, and the inner frame U descends. That is, the vertical plate U3a and the vertical plate U3b holding the underframe-side positioning plate T15 are opened, and the remaining distance H3 is lowered by the lowering distance H2 to hold the fixing portion 24. (FIG. 7). Before the descent, the underframe-side positioning plate T15 is sandwiched between the vertical plates U3a and U3b, so that when assembling the inner frame U, the positioning is quickly and accurately performed on the front frame 5, the rear frame 6, and the underframe 2. Can be. When the rotation auxiliary shaft J2 returns the link center axis J1 upward, the vertical plates U3a and U3b are opened.
[0027]
Here, as compared with the side groove block B2, the side groove block B1 can easily release the mold on the side of the drain slit 3 (lower side; upper side as a product) because of the presence of the drainage slit 3. That is, the left and right side reinforcing ribs U2b and U2c are drawn inward (inside the inner frame U) by the lower side releasing means Us, and the distance H between the vertical plates U3a and U3b is reduced. The pressure applied to the inner frame U by the drainage slit 3 of the block B1 is small, and the lower side of the side groove block B1 in the inverted state can be easily released.
[0028]
In addition, the gutter block B1 having the water passage 1 can be moved only by operating the lower mold releasing means Us of the narrowing mechanism Uk by raising the inner frame U together with the concrete product using the conveying means 10 such as a crane. It is possible to release the mold without lowering. In other words, if the gap S1 is formed on the lower side and the mold is released, no release means such as the lower release means is disposed above the inner frame, but the inner frame U descends due to gravity. In addition, a gap S2 naturally occurs on the upper side, and the mold can be released. In particular, when the water passage 1 of the side groove block B1 is circular, it is possible to release the upper side by the gravity. However, this method may be sufficient in some cases. Therefore, it is preferable to perform the upper mold release by the above method.
[0029]
As described above, in the present embodiment, the water passage 1 is described as the circular side groove block B1, but may be rectangular or the like. Also, the transporting means 10 has been described as moving the gutter block B1 up and down by suspending the gutter block B1 with a crane. However, a transporting means other than a crane may be used as long as such an operation and pull-out operation are possible. .
[0030]
【The invention's effect】
According to the present invention, the narrowing mechanism is operated while the outer periphery of the concrete product is held by the transporting means such as a crane, and the concrete product is released. After the release, the concrete product can be pulled out horizontally by the same transporting means such as a crane. Since it is sufficient, the structure of the inner frame can be simplified. Then, since the concrete product is pulled out horizontally with the inner frame side positioning plate and the underframe side positioning plate facing each other, it is possible to prevent the concrete product and the inner frame from being shaken and to pull out the horizontal.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a concrete product is pulled out from a concrete product forming apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view of the formwork device according to the embodiment.
FIG. 3 is a side view showing the formwork device of the embodiment.
FIG. 4 is a perspective view showing a structure of an inner frame of the formwork device according to the embodiment.
FIG. 5 is a front view showing a narrowing mechanism of an inner frame of the formwork apparatus according to the embodiment.
FIG. 6 is a front view for explaining the operation of the inner frame of the formwork device of the embodiment.
FIG. 7 is a front view illustrating a state where the inner frame of the formwork apparatus according to the embodiment is moved up and down with respect to a concrete product.
FIG. 8 is a perspective view illustrating types of gutter blocks having a water passage therein.
FIG. 9 is a diagram showing the internal structure of the formwork device of the embodiment.
FIG. 10 is a side view of a conventional mold for molding a concrete product.
FIG. 11 is a front view of a conventional mold for molding a concrete product.
FIG. 12 is a front view showing an inner frame of a conventional mold for molding a concrete product.
FIG. 13 is a sectional view of an inner frame of a conventional mold for molding a concrete product.
[Explanation of symbols]
B1, B2 gutter block (concrete product),
1 water channel, 2 upper surface, 3 drain slit,
10 Transportation means such as cranes,
T outer frame,
T15 Underframe positioning plate,
T1 base, T2 frame,
T3, T4 side frame, T5 front frame, T6 rear frame,
U inner frame,
U15 Inner frame side positioning plate,
U1 outer peripheral plate,
U2 reinforcement rib, U2a upper reinforcement rib,
U2b, U2c side reinforcing ribs,
Uh operation handle, Uk narrowing mechanism, Uj rotation axis,
Us lower side release means, U3a, U3b vertical plate,
J1 center axis, J2 rotation auxiliary axis,
J3a, J3b Left and right axes,
S1 Lower gap, S2 Upper gap

Claims (3)

A concrete product forming apparatus comprising an inner frame and an outer frame for forming a concrete product such as a gutter block having a drainage slit in the center thereof with a drainage slit in the center, and an outer frame of the concrete product. The outer frame that forms the base frame is composed of a side frame facing the underframe and front and rear frames facing each other, and an underframe-side positioning plate projecting upward is attached to the underframe, and the inner wall surface of the water passage of the concrete product is formed. A rotating shaft to which the operation handle is connected to the inner frame to be formed, a narrowing mechanism that narrows the outer peripheral plate of the inner frame in conjunction with the rotating shaft, and a frame-side positioning plate that faces downward by rotating the rotating shaft. An inner frame side positioning plate that comes into contact with the inner frame is provided. After the structure is operated and the mold is released, the concrete product is horizontally pulled out from the inner frame while the inner frame side positioning plate and the underframe side positioning plate are in contact with each other through the drainage slit of the concrete product. Formwork equipment for concrete product molding. The narrowing mechanism is provided with a lower side releasing means by a link connected to the rotating shaft to narrow both sides on a lower side of the inner frame, using a transporting means such as a crane for horizontally pulling out the concrete product from the inner frame. After the inner frame is raised together with the concrete product, the lower side of the narrowing mechanism is operated and the lower side is released, and then the upper side is released by gravity lowering of the inner frame raised with the concrete product. The formwork apparatus for forming a concrete product according to claim 1, characterized in that: The narrowing mechanism is constituted by a lower side releasing means by a link connected to the rotating shaft and narrowing both sides on a lower side of the inner frame, and uses a conveying means such as a crane for horizontally pulling out concrete products from the inner frame. Then, the inner frame is raised together with the concrete product, and the lower side releasing means of the narrowing mechanism is operated to release the lower side. Then, at the time of lowering for releasing the upper side, the inner frame side positioning is performed. The concrete product according to claim 1, wherein the plate and the frame-side positioning plate are brought into contact with each other via a drainage slit of the concrete product, and a distance shorter than the raised height distance is lowered. Formwork equipment for molding.

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