JPH09290414A - Molding box device for concrete product, leakage preventive method in molding box device for concrete product, and opening/closing method of frame member of molding box device for concrete product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save labor for a cleaning, and improve the productivity by a method wherein the outer frame is made openable by connecting plates having elasticity, and the connected part of the outer frame is water-tightly sealed by the connecting plates, and a leakage from this part is prevented from generating. SOLUTION: This molding box device is equipped with an internal frame 1, outer frames 3 which are openably provided on both end sides in the width direction of the inner frame 1, and end plates of which the interval can be extended or contracted, being provided on both end sides in the longitudinal direction of the inner frame 1. To both end parts in the width direction of the inner frame 1, the outer frames 3 are connected with a connecting plate 33 made of a metal having elasticity. A pedestal member 2 is equipped with a stopper member 5 which comes into contact with and stops the outer frame 3 when the outer frame 3 is turned to the outside and opened to a specified angle. On both end parts in the width direction, of the end plate, a closing member which guides the outer frame 3 so as to be turned inward, and closes the outer frame 3 by contracting the interval between the end plates, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product formwork apparatus, a method for preventing discharge leakage in a concrete product formwork apparatus, and a method for opening and closing a frame member in a concrete product formwork apparatus. More specifically, the present invention relates to a concrete product formwork apparatus, which can reduce the time and effort required for cleaning by preventing discharge and leakage of water and can provide a quality concrete product, and can open and close the frame member easily and safely.

[0002]

2. Description of the Related Art The main parts of a conventional formwork apparatus for concrete products are shown in FIGS. The formwork device includes an inner frame 81 and an outer frame 82. A base portion of the outer frame 82 is rotatably connected to the inner frame 81 by a shaft pin 83, and is configured to open and close the outer frame 82 with the shaft pin 83 as a fulcrum. A packing 84 is provided at the joint between the inner frame 81 and the outer frame 82 so as to have watertightness.

[0003]

However, the above-mentioned conventional formwork apparatus has the following problems. (A) The outer frame 82 is joined to the inner frame 81 so as to be openable and closable, and the joint portion is temporarily watertight by the packing 84 when the outer frame 82 is closed. However,
The packing 84 is structurally not sufficiently watertight, and discharge of water (liquid in which water and mortar are mixed) leaks due to the pressure of the concrete to be filled. When the discharge leakage occurs, it hardens and intervenes in the joint portion, and the outer frame 82 cannot be closed. Even if it is closed, the close contact of the joint is hindered, which further promotes the leakage of discharge. Further, the edge portion of the concrete product is not formed into a straight line as designed due to the discharge of water adhered to the joint portion of the outer frame 82 and the inner frame 81, and depending on the degree, it becomes a defective product. Therefore, it is necessary to sufficiently clean the spout of the bonded portion after use, but this cleaning requires a great deal of labor, and as a result, the manufacturing efficiency is lowered as a whole. Furthermore,
Since the packing 84 is easily deteriorated, it needs to be replaced frequently, and the maintainability is not good.

(B) The outer frame 82 is rotated outward when the die is removed. At this time, the outer frame 82 is freely rotated by its own weight. For this reason, when the outer frame 82 is rotated, an operator may be injured if it comes into contact with the outer frame 82, so that sufficient caution is required. Also, when reassembling the formwork so that it can be filled with concrete, the outer frame 82 must be rotated in the closing direction. However, since the outer frame 82 has a considerable weight, this work is heavy work for the worker. Furthermore, this work usually requires a worker who closes and supports the outer frame 82 and a worker who closes the end plate (a plate that fixes the outer frame 82 by sandwiching it from both ends), and the work is difficult for one person.

(C) Since the outer frame 82 is rotatably attached to the inner frame 81 by the shaft pin 83, backlash is likely to occur in the shaft support portion due to continuous use. Further, since there are a plurality of shaft support portions, the structure is rather complicated and the number of component parts is large. For this reason, the price of the formwork device becomes high,
Breakdown was also easy to occur.

[0006] The present invention solves the above problems and prevents leakage of dew from a joint between an outer frame and another frame of a formwork apparatus for producing concrete products so that solidified dew does not intervene at the joint. It is an object of the present invention to prevent the occurrence of product defects due to this and to save the trouble of cleaning the discharge. Another object of the present invention is to enable the opening / closing operation of the frame member to be safe and improve the operability in assembling the mold frame device after the mold removal. Further, it is an object of the present invention to make the structure of the portion for mounting the outer frame openably and closably on the other frame simpler so that the price of the mold frame device can be kept low and the failure is less likely to occur.

[0007]

The structure of the invention adopted to achieve the above object is as follows. According to a first aspect of the present invention, there is provided a concrete product formwork apparatus including an underframe or an inner frame, and an outer frame openably and closably provided on the underframe or the inner frame, wherein the outer frame is A concrete product formwork device, which is watertightly attached to the underframe or the inner frame by an elastic metal connecting plate.

In the second invention, the underframe or the inner frame, the outer frame openably and closably provided on both ends of the underframe or the inner frame in the width direction, and the underframe or the inner frame. A formwork device for a concrete product including a pair of gable plates which are provided on both ends in the length direction and whose intervals can be expanded / contracted by an expansion / contraction means, wherein the underframe or inner frame and the outer frame are watertight. A connecting plate made of a metal having elasticity for connecting, and a stop member for contacting the outer frame and stopping the outer frame when the outer frame is rotated outward and opened at a required angle, A formwork device for concrete products.

In the third invention, the underframe or the inner frame, the outer frame openably and closably provided on both ends of the underframe or the inner frame in the width direction, and the underframe or the inner frame. A formwork device for a concrete product including a pair of gable plates which are provided on both ends in the length direction and whose intervals can be expanded / contracted by an expansion / contraction means, wherein the underframe or inner frame and the outer frame are watertight. A mold product apparatus for concrete products, comprising: a connecting plate made of a metal having elasticity for connecting; and a closing member for guiding and closing the outer frame by rotating the outer frame inwardly by reducing the space between the end plates. is there.

In the fourth invention, the underframe or the inner frame, the outer frame openably and closably provided on both ends of the underframe or the inner frame in the width direction, and the underframe or the inner frame. A formwork device for a concrete product including a pair of gable plates which are provided on both ends in the length direction and whose intervals can be expanded / contracted by an expansion / contraction means, wherein the underframe or inner frame and the outer frame are watertight. An elastic metal connecting plate for connecting, a stop member for contacting the outer frame and stopping the outer frame when the outer frame rotates outward and opens at a required angle, and the end plate are provided. A closing device for a concrete product, comprising: a closing member that guides and closes the outer frame so as to rotate inward by reducing the space between the end plates.

In a fifth aspect of the present invention, the stop member has a hooking portion for locking a part of the outer frame in an upward direction when the outer frame is closed. It is a formwork device for concrete products according to the invention.

According to a sixth aspect of the invention, the outer frame is urged in the closing direction when opened by the connecting plate, which is the first, second, third, fourth or third aspect. 5 is a concrete product formwork apparatus according to the fifth invention.

According to a seventh aspect of the present invention, there is provided a method for preventing leakage of discharge in a concrete product formwork apparatus including an outer frame which is openably and closably provided on an underframe or an inner frame, wherein a base portion of the outer frame is provided. This is a method for preventing leakage of discharge in a concrete product formwork device, which is watertightly attached to the underframe or the inner frame by an elastic metal connecting plate.

In the eighth invention, the underframe or the inner frame, the outer frame openably and closably provided on both ends of the underframe or the inner frame in the width direction, and the underframe or the inner frame. A method for opening and closing a frame member in a formwork apparatus for concrete products, comprising: a pair of gable plates provided at both ends in the length direction and having a spacing member expandable and contractible by an expansion / contraction means, and a closing member,
A step of stopping the outer frame by a stop member when the outer frame is rotated outward and opened at a required angle, and is rotated in a closing direction by a closing member by reducing the space between the end plates. A method for opening and closing a frame member in a concrete product formwork apparatus, which comprises a step of guiding and closing.

In a ninth aspect of the invention, the mold for the concrete product according to the seventh or eighth aspect of the invention is characterized in that the outer frame is biased in a closing direction when opened by a biasing means. It is a method of opening and closing a frame member in a frame device.

In a tenth aspect of the invention, the biasing means is a metal connecting plate having elasticity and watertightness, and the method for opening and closing the frame member in the concrete product formwork apparatus according to the ninth aspect of the invention. is there.

A formwork device for concrete products including an underframe and an outer frame openably and closably provided on the underframe further includes a formwork device having an inner frame for forming a underdrain or the like. The material of the connecting plate is, for example, spring steel or stainless steel, but is not limited to these as long as it has sufficient strength, corrosion resistance and watertightness. The stop member is usually provided on the underframe or the inner frame, but is not limited thereto. The closing member is usually provided with a guide portion that abuts and guides the outer frame base portion, but the guide portion may be provided on the outer frame side or both the closing member and the outer frame. The urging means is not particularly limited, and various spring elements such as coil springs and various expansion and contraction elements such as rubber may be used in addition to the elastic metal connecting plate.

(Working) The outer frame can be opened and closed by an elastic connecting plate. Since the joint portion of the outer frame is watertightly sealed by the connecting plate, it is possible to prevent discharge leakage from this portion. Further, since the structure of the joint portion of the outer frame is relatively simple and the number of components is smaller than that of the conventional structure, the manufacturing cost can be kept low and the occurrence of failures can be reduced.

In the case of the one provided with the stop member, when the outer frame is rotated outward and opened to the required angle during die cutting, the stop member comes into contact with the outer frame to stop. Safety can be improved by preventing workers from accidentally falling under the floor.

In the case of the one provided with the closing member, when the mold frame apparatus is assembled after the die-cutting, the outer frame is guided to be closed by the closing member only by reducing the distance between the end plates. Therefore, the operability of opening and closing the frame member is improved, and the physical burden on the operator can be reduced.

In the case where the stop member has a latching part for latching a part of the outer frame in the upward direction when the outer frame is closed, for example, when the mold frame device is moved, the outer frame is attached to the outer frame part. When hanging by hanging a wire or the like, the load can be held by the hooking portion of the stop member. Therefore, it is possible to reduce the load load applied to the joint portion of the outer frame, and prevent damage such as the outer frame falling off or the connection portion deforming.

In the case where the outer frame is biased in the closing direction when it is opened by the biasing means such as the connecting plate, when the outer frame is opened outward, for example, the connecting plate Since the elastic force provides sufficient drag, it is hard to fall suddenly,
High safety. Further, since the force of pulling the outer frame in the closing direction is small, it is possible to easily perform the work of reducing the distance between the end plates.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a first embodiment of a formwork apparatus according to the present invention, FIG. 2 is a perspective view showing a state in which an end plate and an outer frame of the formwork apparatus shown in FIG. 1 are opened, and FIG. 1 is a cross-sectional explanatory view showing a use state of the formwork apparatus shown in FIG. 1 in a state in which the outer frame is closed, and FIG. 4 is a cross-sectional explanatory view showing a use state of the formwork apparatus shown in FIG. 1 and in a state in which the outer frame is open. FIG. 5 is an enlarged explanatory view of an essential part showing the structure of the outer frame base and the stop member, and FIG.
FIG. 6 is an explanatory view showing the action of the closing member.

Formwork device A1 is a concrete product U
It is a formwork apparatus for manufacturing a character groove block. It should be noted that, in the following description, description of parts having the same structure as the known parts of the formwork apparatus A1 will be omitted or briefly described. Further, since the structure of the formwork device is bilaterally symmetrical, the structure on one side will be mainly described in the following description.

The formwork apparatus A1 comprises an inner frame 1, a base member 2, an outer frame 3, a end plate 4, and a clamp device 6. The inner frame 1 has a substantially U-shaped cross section with a flat upper surface, and is provided over a substantially entire length of the formwork apparatus A1 in a state in which a gutter-shaped one is laid down. End bottom plates 10 are horizontally provided at lower portions on both widthwise ends of the inner frame 1 (see FIGS. 3 and 4).

A pedestal member 2 is attached to the bottom of the inner frame 1. An outer frame 3 is attached to the pedestal member 2 over the entire length so that the base portion is rotatable. Each outer frame 3 is formed to have substantially the same length as the inner frame 1, and has a structure in which a plurality of reinforcing ribs 31 are provided in the vertical direction on the outside of the form plate 30. Also, the form board 3
A bottom rib plate 32 is provided at the lower end of 0 over the entire length. Further, stop members 5 are provided at three positions on both ends of the base member 2 in the width direction at equal intervals.

The structure of the mounting portion of the outer frame 3 and the stop member 5 will be described with reference to FIG. A template 21 for forming a chamfer on the shoulder of the U-shaped groove block on the side surface of the base member 2.
Are provided over the entire length of the base member 2. It should be noted that the template 21 and the vertical portion 331 of the connecting plate 33, which will be described later, and the seat plate 5
0 is fixed to the pedestal member 2 by the attachment bolt 35.

A chamfered slope 210 continuous with the edge of the end bottom plate 10 is provided inside the upper portion of the template 21. A fitting step portion 211 is provided outside the upper part of the template 21 adjacent to the chamfered slope 210. The lower end of the mold frame plate 30 is fitted into the fitting step portion 211. An arcuate sliding surface 300 is provided at the lower end of the form plate 30 so as to be in close contact with the upper end of the fitting step 211 at all times when the outer frame 3 is rotated.

On the outer surface of the template 21, a connecting plate 33 having the same length as the outer frame 3 and having an L-shaped cross section is attached. The connecting plate 33 is formed of spring steel, and is fixed by applying a metal seat plate 50 to the outer surface side of the lower portion of the vertical portion 331.
The connecting plate 33 is a horizontal portion 332 that is bent substantially horizontally to the outside.
Are attached so as to be slightly higher than the upper edge of the base member 2.

In the outer frame 3, the lower edge portion of the mold plate 30 is inscribed in the vertical portion 331 of the connecting plate 33, and the bottom rib plate 32 is brought into contact with the upper surface of the horizontal portion 332 to attach the seat plate 36 and the attachment. Bolt 37
Has been fixed by. As a result, when the outer frame 3 is rotated in the opening direction, it is urged in the closing direction by the elasticity of the connecting plate 33. A sufficient gap is provided between the seat plate 50 and the seat plate 36 to prevent contact when the outer frame 3 is rotated outward and opened.

The metal stop member 5 is fixed to the seat plate 50. As shown in FIG. 5, the stopping member 5 is a substantially "U" -shaped plate-like member, which is provided with a stopping portion 51 on the inner side and an engaging portion 52 on the lower side. The stop portion 51 is provided so as to be inclined in a direction in which the outer side is lowered so that the bottom surface of the bottom rib plate 32 that has rotated when the outer frame 3 is opened to a required angle is in close contact. Further, the hooking portion 52 is horizontally provided so that the upper surface of the bottom rib plate 32 comes into close contact with the outer frame 3 when the outer frame 3 is vertically closed.

The hooking portion 52 is provided above the stopping portion 51. The hook portion 52 is horizontally provided so that the upper surface of the bottom rib plate 32 comes into close contact with the outer frame 3 when the outer frame 3 is closed. A metal swelling prevention member 53 is provided at the base of the hook portion 52.
Is stuck. The bulging prevention member 53 is formed wider than the plate thickness of the stop member 5, and contacts the tip edge of the bottom rib plate 32 to prevent the outer frame 3 from bulging due to the concrete pressure. The widened swelling prevention member 53 can prevent abrasion of the tip edge of the bottom rib plate 32.

On both end sides of the inner frame 1 in the length direction, the end plates 4 are provided.
Is provided. The end plate 4 is a clamp device 6 having a shaft (not shown) provided through the inside of the inner frame 1.
It is attached so that the space can be expanded and contracted by. A mold space 7 having an open top is formed between the outer frame 3, the inner frame 1 and the end plate 4.

A closing member 40 is fixed to the lower portions of both side surfaces of the end plate 4. The tip of the closing member 40 is the end plate 4
It is provided so as to project inward from. An inclining guide part 400 and a guide part 401 parallel to the length direction of the outer frame 3 are provided inside the tip of the closing member 40.

The operation of the closing member 40 will be described with reference to FIGS. 6 (a), 6 (b) and 6 (c). FIG. 6A shows the state where the outer frame 3 is open and stopped by the stop member 5.
In addition, the outer frame 3 shows a horizontal cross-section of the base portion. The portion of the base of the outer frame 3 that comes into contact with the closing member 40 is guided when the end plate 4 moves in the direction of narrowing (arrow direction).
00 is in the range of hits.

FIG. 6 (b) When the end plate 4 moves in the direction of narrowing, the guide portion 400 causes the outer frame 3 to move.
The outer frame 3 is rotated in the closing direction by hitting the corner portion of the reinforcing rib 31 and further moving the end plate 4. When the outer frame 3 is rotated in the opening direction, it is biased in the closing direction by the elasticity of the connecting plate 33, so that a large force is not required to narrow the gap between the end plates 4, and the clamp device 6 is used.
Can be easily operated.

By further moving the end plate 4 in the direction of narrowing, the outer frame 3 becomes substantially vertical, and the end plate 4 is further narrowed in the state where the guide portion 401 and the reinforcing rib 31 are in close contact with each other. Engaging hole 4
1 and the engaging projection 39 of the outer frame 3 are engaged, and the end plate 4 and the outer frame 3 are closed.

(Operation) The operation of the present embodiment will be described with reference to FIGS. The clamp device 6 of the formwork device A1 is operated to close and fix the end plate 4 and the outer frame 3 (state of FIG. 1). The outer frame 3
The joint portion of the base portion of is watertight by the connecting plate 33. A bone frame (not shown) is housed inside the mold space 7.

Concrete is poured into the mold space 7 (see FIG. 3). Since the dew contained in the concrete is blocked by the connecting plate 33, it does not leak outside from this portion. When the concrete is solidified, the clamp device 6 is operated to open the end plate 4 and the outer frame 3 to take out the concrete product (U-shaped groove block) C from the formwork device A1 (see FIG. 4). The outer frame 3 does not fall extremely or suddenly to the outside due to the elastic force of the connecting plate 33, and is stopped by the stop member 5, so that it is excellent in safety.

Since the bottom rib plate 32 is hooked on the hooking portion 52 when the outer frame 3 is closed on the stop member 5, for example, when the mold apparatus A1 is moved, a wire is attached to the outer frame 3 portion. In the case of hanging by hanging, for example, the load can be held by the hook portion 52 of the stop member 5. Therefore, it is possible to reduce the load load applied to the connecting plate 33, which is the joint portion of the outer frame 3, and prevent the outer frame 3 from being damaged by being dropped or deformed.

FIG. 7 is an explanatory view showing a use state of the second embodiment of the formwork apparatus according to the present invention with the outer frame closed, and FIG. 8 is a second embodiment of the formwork apparatus according to the present invention. It is explanatory drawing of the state which used the form of this and which showed the state which opened the outer frame. In the drawings, the stop member 5 is not shown, and the same or equivalent parts as those of the above-described mold apparatus A1 are designated by the same reference numerals. In the formwork apparatus A2, the lower end of the formwork plate 30 is aligned with the bottom surface position of the bottom rib plate 32. Therefore,
The upper portion of the vertical portion 331 of the connecting plate 33 is bent in a gentle arc shape when the outer frame 3 is opened to the outside, and the load of the outer frame 3 is dispersed without being concentrated at one point, which is excellent in durability.

FIG. 9 is an explanatory view showing a use state of the third embodiment of the formwork apparatus according to the present invention and a state in which the outer frame is closed. In the drawings, the same or equivalent parts as those of the above-described mold apparatus A1 are designated by the same reference numerals. The formwork device A3 is for manufacturing an underdrain block. Pedestal member 2
Has an underframe 2a on its upper part. The inner frame 1a has a tubular shape. In the present embodiment, the outer frame 3 is attached to both end sides of the underframe 2a instead of both end sides of the inner frame as in the formwork apparatus A1. The operation of each part is almost the same as that of the formwork apparatus A1 described above, and the description thereof is omitted. The present invention is not limited to the illustrated embodiment, but can be applied to various other formwork devices, and various modifications can be made within the scope of the claims.

[0043]

The present invention has the above configuration and has the following effects. (A) Since the outer frame can be opened and closed by the elastic connecting plate, and the joint portion of the outer frame is watertightly closed by the connecting plate, it is possible to prevent discharge leakage from this part. Therefore, the labor of cleaning can be reduced and the productivity is improved.

(B) Since the structure of the joint portion of the outer frame is relatively simple and the number of components is smaller than that of the conventional structure, the manufacturing cost can be kept low and the occurrence of failures can be reduced. . Since the packing is not used unlike the conventional structure, the replacement is not necessary and the maintainability is excellent.

(C) In the case where the stop member is provided,
During die cutting, when the outer frame rotates outward and opens at the required angle, the stop member comes into contact with the outer frame to stop, so that it is possible to prevent an operator from accidentally becoming an underlay. , Improve safety.

(D) In the one provided with the closing member,
After removing the mold, the outer frame can be guided to be rotated inward by the closing member and closed by simply reducing the distance between the end plates when assembling the mold device, which improves the operability of opening and closing the frame member. Also, the physical burden on the worker can be reduced.

(E) In the case where the stop member has a latching part for latching a part of the outer frame in the upward direction when the outer frame is closed, for example, when moving the formwork device. When a wire or the like is hung on the outer frame portion to hang it, the load can be held by the hook portion of the stop member. Therefore, it is possible to reduce the load load applied to the joint portion of the outer frame, and prevent damage such as the outer frame falling off or the connection portion deforming.

(F) In the case where the outer frame is biased in the closing direction when opened by the biasing means such as the connecting plate, when the outer frame is opened outward, for example, Since the elastic force of the connecting plate provides sufficient drag force, it is difficult to fall down suddenly and safety is high. Further, since the force of pulling the outer frame in the closing direction is small, it is possible to easily perform the work of reducing the distance between the end plates.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a formwork apparatus according to the present invention.

FIG. 2 is a perspective view showing a state where an end plate and an outer frame of the formwork apparatus shown in FIG. 1 are opened.

FIG. 3 is a cross-sectional explanatory view showing a usage state of the formwork apparatus shown in FIG. 1 and a state in which an outer frame is closed.

FIG. 4 is a cross-sectional explanatory view showing a usage state of the formwork apparatus shown in FIG. 1 with an outer frame being opened.

FIG. 5 is an enlarged explanatory view of main parts showing the structures of an outer frame base and a stop member.

FIG. 6 is an explanatory view showing the action of the closing member.

FIG. 7 is an explanatory view showing a use state of the second embodiment of the formwork apparatus according to the present invention and showing a state in which the outer frame is closed.

FIG. 8 is an explanatory view showing a use state of the second embodiment of the formwork apparatus according to the present invention and showing a state where the outer frame is opened.

FIG. 9 is an explanatory view showing a usage state of the third embodiment of the formwork apparatus according to the present invention and showing a state in which the outer frame is closed.

FIG. 10 is an explanatory view showing a usage state of the conventional formwork apparatus with the outer frame closed.

FIG. 11 is an explanatory view showing a usage state of a conventional formwork apparatus and showing a state in which an outer frame is opened.

[Explanation of symbols]

 A1, A2, A3 Formwork device 1, 1a Inner frame 10 End bottom plate 2 Base member 2a Baseframe 21 Template 210 Chamfered slope 211 Fitting step 3 Outer frame 30 Formboard 300 Sliding surface 31 Reinforcing rib 32 Bottom Rib plate 33 Connection plate 331 Vertical part 332 Horizontal part 35 Mounting bolt 36 Seat plate 37 Mounting bolt 4 Gable plate 40 Closing member 400 Guide part 401 Guide part 5 Stop member 50 Seat plate 51 Stop part 52 Stopping part 53 Swelling prevention member 6 Clamping device 7 type space

Claims (10)

[Claims] 1. The underframe (2a) or the inner frame (1) and the underframe (2
a) or an outer frame (3) that can be opened and closed on the inner frame (1)
A concrete product formwork device including, and the outer frame (3) is watertightly attached to the underframe (2a) or the inner frame (1) by an elastic metal connecting plate (33). Formwork equipment for concrete products, characterized in that 2. The underframe (2a) or the inner frame (1) and the underframe (2
a) or the outer frame (3) that can be opened and closed at both ends in the width direction of the inner frame (1) and the both ends of the underframe (2a) or the inner frame (1) in the length direction. A formwork device for concrete products including a pair of gable plates (4) whose expansion and contraction can be expanded and contracted by expansion and contraction means, the underframe (2a) or the inner frame (1) and the outer frame (3). When the outer frame (3) pivots outward and opens at the required angle, it comes into contact with the outer frame (3) and the outer frame (3). A formwork device for concrete products, comprising: a stop member (5) for stopping the frame (3). 3. The underframe (2a) or the inner frame (1) and the underframe (2
a) or the outer frame (3) that can be opened and closed at both ends in the width direction of the inner frame (1) and the both ends of the underframe (2a) or the inner frame (1) in the length direction. A formwork device for concrete products including a pair of gable plates (4) whose expansion and contraction can be expanded and contracted by expansion and contraction means, the underframe (2a) or the inner frame (1) and the outer frame (3). An elastic metal connecting plate (33) for water-tightly connecting the outer frame (3) and the closing member which guides and closes the outer frame (3) so as to rotate inward by reducing the distance between the end plate (4). 40) and a formwork device for concrete products, characterized by comprising: 4. The underframe (2a) or the inner frame (1) and the underframe (2
a) or the outer frame (3) that can be opened and closed at both ends in the width direction of the inner frame (1) and the both ends of the underframe (2a) or the inner frame (1) in the length direction. A formwork device for concrete products including a pair of gable plates (4) whose expansion and contraction can be expanded and contracted by expansion and contraction means, the underframe (2a) or the inner frame (1) and the outer frame (3). When the outer frame (3) pivots outward and opens at the required angle, it comes into contact with the outer frame (3) and the outer frame (3). The stop member (5) for stopping the frame (3) and the end plate (4) provided on the end plate (4) are reduced to guide and close the outer frame (3) so as to rotate inward. A formwork device for concrete products, comprising: a closure member (40). 5. The stop member (5) has a locking portion (52) for locking a part of the outer frame (3) in an upward direction when the outer frame (3) is closed. The formwork device for concrete products according to claim 2, which is characterized in that: 6. The outer frame (3) is urged in the closing direction when opened by the connecting plate (33), as claimed in claim 1, 2, 3, 4 Alternatively, the concrete product formwork apparatus according to item 5. 7. A method for preventing leakage of discharge in a concrete product formwork apparatus including an outer frame (3) openably and closably provided on an underframe (2a) or an inner frame (1), said outer frame ( Prevention of discharge leakage in concrete product formwork equipment, characterized in that the base of (3) is watertightly attached to the underframe (2a) or the inner frame (1) by an elastic metal connecting plate (33). Method. 8. The underframe (2a) or the inner frame (1) and the underframe (2
a) or the outer frame (3) that can be opened and closed at both ends in the width direction of the inner frame (1) and the both ends of the underframe (2a) or the inner frame (1) in the length direction. A method of opening and closing a frame member in a formwork apparatus for concrete products, comprising: a pair of gable plates (4) having a closing member (40) and capable of expanding and contracting at intervals by expansion and contraction means, wherein the outer frame (3 ) Is rotated outward and opened at a required angle, the step of stopping the outer frame (3) by the stop member (5), the closing member (40) by reducing the space between the end plates (4) A method of opening and closing a frame member in a formwork apparatus for concrete products, comprising a step of guiding the outer frame (3) to rotate in a closing direction and closing. 9. The concrete product formwork according to claim 7, wherein the outer frame (3) is biased in a closing direction when opened by a biasing means. A method for opening and closing a frame member in an apparatus. 10. The method for opening and closing a frame member in a concrete product formwork apparatus according to claim 9, wherein the urging means is a metal connecting plate (33) having elasticity and watertightness.