JPH0767687B2 - Formwork device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork apparatus, and more particularly to a formwork for molding concrete products such as box culverts.

[0002]

2. Description of the Related Art Conventionally, as a formwork device of this type, for example, as a formwork device for molding a box culvert,
A molding bottom plate for arranging the core body is provided, and molding side plates are respectively arranged at front and rear portions and left and right portions of the molding bottom plate, and the front, rear, left and right molding side plates respectively connect a plurality of adjacent molding side plates to each other. Each of the front, rear, left and right molding side plates and the core body disposed on the molding bottom plate form a cavity for box culvert molding.

[0003]

In the above construction, since the front, rear, left, and right molding side plates connect adjacent molding side plates to each other by individual operations by a plurality of connecting means, the molds for matching the front, rear, left, and right molding side plates are combined. It takes a lot of work for the assembling operation, and when releasing the assembled front, rear, left, and right molding side plates, the adjacent molding side plates are disconnected by individual operations by multiple connecting means. There is a problem in that a large number of steps are required for the demolding operation for separating the molds, and therefore the work efficiency of opening and closing the mold is poor and it is not preferable in terms of labor saving.

The present invention has been made in view of the above points, and is provided in the front and rear portions and the left and right portions of the fixed frame.
The front and rear and left and right forming mold plates can be moved back and forth at the same time, and the mold assembling operation and the mold releasing operation can be easily performed. Therefore, the work efficiency of opening and closing the mold can be improved and the labor saving can be achieved. It is an object of the present invention to provide a formwork apparatus which is preferable in terms of the purpose.

[0005]

Means for Solving the Problems] formwork system of the present invention, the solid
Arranged opposite to the front and back and left and right of the fixed frame
The front and rear sections are installed along the guide rails so that they can move back and forth.
And the left and right forming die plates, the links pivotally supported by the front and rear and left and right forming die plates, and the front and rear and left
The ends of each link on the right are rotatably supported and
And the link that moves the left and right links forward and backward , and the fixed frame
It is rotatably provided in the frame and operates the interlocking body to simultaneously mold the respective molding die plates through the respective links.
Has a handle that moves back and forth in the mating direction and demolding direction
It is equipped with an operating rod.

[0006]

In the formwork apparatus of the present invention, when the front and rear and the left and right forming mold plates are matched with each other, when the operating rod is rotated toward one side by the handle , the interlocking body is operated by the operating rod. At the same time, each link is simultaneously pulled by this interlocking body, and at each link, the respective molding die plates are advanced along the respective guide rails in the direction in which the molding is performed at the same time. Then, by operating the operating rod by a predetermined amount, the front and rear and left and right molding die plates are interlocked to advance to the position for mating, and the front and rear and left and right molding die plates are simultaneously aligned to the set position. .

When the front and rear and left and right molding die plates are removed from the mold, the operating rod is rotated toward the other side by the handle, and the interlocking body is moved by the operating rod. In addition to being operated in the direction opposite to that of the above, each link is simultaneously pushed by this interlocking body, and at each link, the respective molding die plates are simultaneously moved along the respective guide rails in the demolding direction. Be retreated. Then, by operating the operating rod by a predetermined amount, the front and rear and left and right forming mold plates are interlocked and retracted to the mold releasing position, and the front and rear and left and right forming mold plates are simultaneously set to the set positions. To be demolded.

Therefore, it is possible to move back and forth by operating the operating rod.
The right and left forming mold plates can be easily moved back and forth, and the work efficiency of opening and closing the mold can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a fixed frame formed in a substantially annular shape. In the front and rear portions and the left and right portions of the fixed frame 1, support frames 2 are spaced apart from the lower portions of both sides of the fixed frame 1 in a direction crossing the fixed frame 1. Are fixed in parallel to each other. The support frames 2 on both lower sides of each part are
It has a vertical plate portion 3, a horizontal mounting plate portion 4 fixed to each part of the fixed frame 1 at the upper end portion of the vertical plate portion 3, and a horizontal ground plate formed at the lower end portion of the vertical plate portion 3. And a portion 5, and has a substantially I-shaped cross section. Thus, the support frames 2 arranged on both sides of each of the above parts are formed in an L-shape in plan view by connecting the inner ends of the adjacent support frames 2 to each other.

Guide rails 6 are integrally formed on the inner upper portions of the grounding plate portions 5 on both sides along the lengthwise direction of the grounding plate portion 5, and the outer ends of the grounding plate portions 5 are integrally formed. Between the inner edge portion and the inner edge portion of the outer end portion of the mounting plate portion 4, support plates 7 facing the vertical plate portion 3 are vertically fixed. Further, between the support plates 7 on both sides and the vertical plate 3, the guide rollers 9 are rotatably mounted on the roller support shafts 8 on the outer extension lines of the guide rails 6. , The guide rollers 9 on both sides are
An annular guide groove 10 having a smaller radius is formed in the middle portion in the lengthwise direction.

Further, elongated guides 11 are disposed along the lengthwise direction of the guide rails 6 on the guide rails 6 on both sides, and the outer ends of the guides 11 on both sides are arranged. It is engaged with and supported on the guide groove 10 of the guide rollers 9 on both sides. Further, the guides 11 on both sides are
A connecting rod 12 integrally connects the portions near the inner end thereof. Further, a support fitting 13 formed in a U-shape in a plan view is integrally fixed to the inner ends of the guides 11 on both sides, and the support fitting 13 on both sides has a lower portion on the guide rail 6. A guide roller 14 having an engaging recess 14a engaged with is rotatably supported by a roller support shaft 15, and a guide roller 16 engaged with the lower surface of the mounting plate 4 is provided above the guide roller 14. Each of them is rotatably supported by a roller support shaft 17. The guides 11 on both sides are integrally formed by the connecting rod 12 on the inner and outer guide rollers 9,
14 and 16 are provided so as to be movable back and forth along the respective guide rails 6.

Next, in each of the front, rear, left and right parts of the fixed frame 1, brackets 18 are vertically and integrally fixed to the outer ends of the guides 11 on both sides, and the upper portions of the brackets 18 on both sides are fixed. A molding die plate 19 which is vertically arranged is integrally fixed to this by a plurality of bolts and nuts 20. The molding die plate 19 of each part has a rectangular frame body 21 fixed to the brackets 18 on both sides, and a molding plate 22 is vertically integrally fixed to the inner portion of the frame body 21. There is.
Then, when the front and rear and left and right molding die plates 19 are moved inward to approach each other, both ends of the molding plate 22 of the front and rear, left and right molding die plates 19 are brought into liquid-tight contact with each other, The forming surface of the concrete product is configured by the forming plate 22.

Further, in each of the front, rear, left and right parts of the fixed frame 1, a mounting piece 23 is integrally projected toward the inner side at an intermediate part of the connecting rod 12 connecting the guides 11 on both side parts, One end of a link 24 is rotatably supported by a supporting shaft 25 on each of the mounting pieces 23 so as to be horizontally rotatable.
Further, in each of the front, rear, left and right links 24, nuts 27 and 28 as interlocking bodies are rotatably supported by the common support shaft 26 at the other end of two adjacent links 24. ing.
Of the nuts 27, 28 on both sides, one of the nuts 27, 28
Is formed for the right-hand thread, the other nut 28 is formed for the left-hand thread, and the nuts 27, 28 on both sides of this nut are diagonally located and are spaced relative to each other. ing.

Further, bearing bodies 29 are fixed to the lower portion of the fixed frame 1 located on both diagonally opposite side portions where the nuts 27 and 28 on both side portions are arranged.
Both sides of a screw rod 30 as an operating rod are rotatably mounted between the 29. The threaded rod 30 has an axially formed right screw 31 in which the nut 27 for the right screw is screwed so as to be capable of advancing and retracting on one side from the middle part thereof, and the other side is for the left screw. A left screw 32 is formed in the axial direction by screwing a nut 28 of the above-mentioned nut 28 so as to move back and forth. A handle 33 for rotating the screw rod 30 is connected to one end of the screw rod 30, and a bearing member 29 is attached to the other end of the screw rod 30.
An engaging portion 34 for preventing the slip-out from being formed is flat.

Then, by rotating the handle 33, the nut 27 screwed into the right-hand screw 31 and the nut 28 screwed into the left-hand screw 32 are simultaneously advanced and retracted, and the nuts 27 and 28 are pivotally supported. Each of the two links 24 is moved back and forth, and the respective front and rear and left and right molding die plates 19 are simultaneously moved forward and backward by the respective links 24 to open and close.

Next, a molded bottom plate 36 having the same shape as the upper plate 35 is integrally fixed to the upper plate 35 of the fixed frame 1, and the front and rear portions and the left and right parts of the molded bottom plate 36 and the fixed frame 1 are fixed. The contact plate 37 is vertically fixed integrally with the contact plate 37, and the engaging plates 38 integrally fixed to the lower ends of the front, rear, left and right molding plates 22 are brought into contact with and separated from the front, rear, left and right contact plates 37. A tapered chamfer 39 for chamfering the outer shape of the concrete product is formed at the upper ends of the front, rear, left and right engaging plates 38.

A core support plate 40, which is smaller than the molded bottom plate 36, is superposed and fixed on the upper part of the molded bottom plate 36. The front and rear parts and the left and right parts of the core support plate 40 are the front and rear parts and the left and right parts. A chamfered portion 41 having a tapered shape is formed so as to be chamfered with respect to the inner shape of the concrete product so as to be spaced apart from the chamfered portion 39 of each engaging plate 38 of the section. On the core support plate 40, a separable core frame 42 is arranged at a position close to the inner side of the tapered chamfer 41.

Next, the operation of the above embodiment will be described.

When the front, rear, left, and right molding die plates 19 are matched with each other, the handle 33 is rotated to rotate the screw rod 30 toward one side. However, the left screw 32 moves the other nuts 28 in a direction in which the nuts 28 are separated from each other, and the support shafts 26 of the nuts 27, 28 on both sides of the nuts 27, 28 make the two links 24 as a set. At the same time, the guides 11 on both sides are pulled by the respective links 24, and the guides 11 on both sides of the respective parts are guided by the guide rollers 9, 14, 16 to the upper portion of the guide rail 6 and the support frame 2. The molding plates 19 guided by the mounting plate portion 4 are simultaneously pulled, and the respective molding die plates 19 supported by the guides 11 on both sides of the respective portions via the brackets 18 are simultaneously advanced in the direction of die matching.

By rotating the screw rod 30 by a predetermined amount, the front, rear, left and right molding die plates 19 are interlocked and advanced to positions for matching the die, and the molding plates 22 of the front, rear, left and right molding die plates 19 are moved. The engaging plates 38 are front, rear, left and right contact plates of the fixed frame 1.
37, so that the front and rear left and right portions of the molding bottom plate 36 and the molding plates 22 of the front, rear, left and right molding die plates 19 are simultaneously aligned in set positions, and both ends of the front, rear, left and right molding plates 22 are aligned. The parts are fitted together in a liquid-tight manner at the set position. Thus, the molding plates 22 of the front, rear, left and right molding templates 19 form a series of molding surfaces 43 for molding the outer shape of the concrete product.

Further, a core frame body 42 is arranged on the core support plate 40, and the front and rear and left and right parts of the core frame body 42 are formed in the front and rear and left and right tapered chamfered portions 41 of the core support plate 40. By installing in a state close to the inner part, the series of molding surfaces 44 on the front, rear, left and right of the core frame 42 and the series of molding surfaces 43 and the molding surfaces 43, 44 located inside and outside A cavity 45 for molding a concrete product is constituted by the molding bottom plate 36.
Then, concrete is poured into the cavity 45 and cured.

Next, when removing the front, rear, left and right molding die plates 19, the screw rod 30 is rotated toward the other side by the handle 33, and the right screw 31 of this screw rod 30 rotates one nut. The left screw 32 moves the other nut 28 in the direction in which the other nuts 28 approach each other, and the support shafts 26 of the nuts 27, 28 on both sides of the nuts 27 form a pair of links 24. Are simultaneously pushed, and the guides 11 on both sides of each of the links 24 are pushed by the respective links 24, and the guides 11 on both sides of the respective parts are guided by the guide rails 6, 14, 16 through the guide rails 6.
And a direction in which the molding die plates 19 supported by the mounting plate portions 4 on the upper portion of the support frame 2 and simultaneously pushed and supported by the guides 11 on both sides of the respective portions via the brackets 18 simultaneously mold. It is retracted in the opposite direction.

By rotating the screw rod 30 by a predetermined amount, the front, rear, left and right forming mold plates 19 are interlocked and retracted from the mold matching position, and the forming plates 22 of the front, rear, left and right forming mold plates 19 are engaged. The plywood 38 is the front and rear and left and right contact plates 37 of the fixed frame 1.
Are separated from each other at the same time, thus
At the same time, the molding plates 22 of 19 are removed from the outer shapes of the front, rear, left, and right parts of the concrete product to set positions outside.

Further, by disassembling the core frame 42,
The front, rear, left and right frame plates of the core frame body 42 are demolded from the inner shape of the front, rear, left and right parts of the concrete product to predetermined positions inward. Then, the concrete product is taken out from the molded bottom plate 36.
Therefore, by rotating the screw rod 30, the front, rear, left, and right forming mold plates 19 are easily moved back and forth inward and outward, and the respective molding mold plates 19 are easily opened and closed, and the molds of the respective molding mold plates 19 are assembled. Work and demolding work are performed efficiently.

Next, in the above-mentioned embodiment, each link 24 for advancing and retracting the front, rear, left and right forming mold plates 19 has two sets as a set, and its end is a common support shaft 26 as an interlocking body. The case where the nuts 27 and 28 on both sides are rotatably supported is explained, but the present invention is not limited to this, and as shown in FIG. The ends may be rotatably rotatably supported by supporting shafts 47 on the peripheral side of a rotating disk 46 serving as an interlocking body.

In this case, the rotating disc 46 is fixed at its central portion to a vertical rotating shaft 48 rotatably mounted on the lower portion of the fixed frame 1, and the lower end portion of the rotating shaft 48 is fixed. Secure the bevel gear 49 to. Further, bearing bodies 50 are separately arranged and fixed on the inner and outer portions of the fixed frame 1 in a diagonal direction, and both side portions of a rotating rod 51 as an operating rod are rotatably attached to the inner and outer bearing bodies 50. The bevel gear 52 meshed with the bevel gear 49 is fixed to the inner end of the rotating rod 51, and the handle 53 for rotating the rotating rod 51 is fixed to the outer end of the rotating rod 51. To do.

With this structure, the handle
When the rotary rod 51 is rotated by 53, the rotary disc 46 is rotated via the bevel gear 49 and the bevel gear 52 of the rotary rod 51, and each link 24 is moved forward and backward by the rotary disc 46. At the same time, the respective front and rear, right and left molding die plates 19 are simultaneously moved forward and backward in the inward and outward directions by the respective links 24, and the respective molding die plates 19 are easily opened and closed. The work of assembling and demolding the mold is efficiently performed.

[0029]

According to the present invention, the operating rod is operated by the handle.
Fixed by interlocking body and link by rotating operation
Front and back and left and right arranged on the front and back and left and right of the frame
Each mold plate simultaneously die matching can be moved back and forth in the direction and the demolding direction, it is possible to perform the type built-in operation and de-mold operations easier, thus, for example forming a tetrahedron
A box culvert-like concrete product.
The working efficiency for opening and closing the mold to form can be significantly improved, this provides a preferred formwork system in achieving labor saving
You can

[Brief description of drawings]

FIG. 1 is a bottom view of a formwork apparatus showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line a-a of the above.

FIG. 3 is a plan view in which a part of the guide rail mechanism is cut away.

FIG. 4 is a side view in the direction of the arrow in FIG.

FIG. 5 is an enlarged cross-sectional view taken along line 2b-b of FIG.

FIG. 6 is a bottom view showing a state in which the above respective molds are opened.

FIG. 7 is a bottom view of a formwork apparatus showing another embodiment.

FIG. 8 is a bottom view showing a state in which the above respective molds are opened.

[Explanation of symbols] 1 Fixed frame 6 Guide rail 19 Forming plate 24 Link 27, 28, 46 Interlocking body 30, 51 Operating rod 33, 53 Handle

Claims (1)

[Claims] 1. A front and rear part and a left and right part of a fixed frame.
Front and rear and left and right mold plate provided retractably along disposed to the guide rails relative, respectively, the front and rear and the left
And links each to the right of the mold plates is rotatably journaled, communication to the front and rear and left and right ends of each link is moved back and forth the links each rotatably supported by the front and rear and right and left <br A moving body and a movable body rotatably provided on the fixed frame to operate the moving body to simultaneously move the respective molding die plates through the respective links in a mold fitting direction and a mold releasing direction. And a control rod having a handle for moving back and forth.