JPH0529522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a formwork apparatus, for example, one for casting and forming bridge girder blocks such as bridges with concrete.

(Prior Art) Conventionally, as this type of formwork device, for example,
A movable mold that molds the legs of the bridge girder block on both sides of the fixed mold body that forms the installation body of the bridge girder block, and a horizontal protrusion that is wider than the leg parts and projects horizontally on the upper part of this leg. The movable body is arranged to be movable back and forth in the left-right direction, and a sheath tube buried in the horizontal protrusion is horizontally suspended between the front and rear portions near the upper ends of the movable body on both sides.

A cavity for forming a bridge girder block is formed by the fixed mold body and the movable mold bodies on both sides, and a bridge girder block is formed in which a sheath pipe is buried in a horizontal protrusion in which concrete is cast and cured in the cavity. It is becoming more and more common.

(Problems to be Solved by the Invention) In the above-mentioned formwork device, after curing the bridge girder block, the movable mold bodies on both sides are moved horizontally and released outward. A sheath pipe is hung horizontally between the front and rear parts near the upper end of the movable body on both sides at a predetermined inclination angle, and the front and rear sheath pipes are buried in concrete and, after curing, both sides are movable. If you try to move the mold body horizontally and release it outward, the inclined outer end support parts of the sheath tube at the front and rear will act as pull-out resistance for the movable mold bodies on both sides of the mold.
There is a problem in that the movable mold bodies on both sides cannot be released outward. In addition, in the case where the sheath tube is installed at a predetermined inclination angle between the front and rear movable bodies on both sides, it is conceivable to make each of the movable bodies on both sides split. Such a configuration poses a problem in that mold matching during molding, mold clamping, and mold release after curing require time and effort.

Therefore, the present invention has been made in view of such problems, and it is possible to release a movable mold body that can move forward and backward with respect to a fixed mold diagonally outward at an arbitrary inclination angle, and thereby To provide a formwork device with excellent workability that is supported between movable mold bodies and can smoothly release the movable mold bodies without being affected by the inclination angle of a sheath pipe buried in concrete. It is intended to.

[Structure of the invention]

(Means for Solving the Problems) The formwork device of the present invention includes a base, a fixed mold body fixed to the upper part of the base and having a molding surface on the upper surface,
a movable mold body disposed on both sides of the fixed mold body on the base and having a molding surface forming a cavity together with the molding surface of the fixed mold body on opposing inner sides; The movable mold body is provided with mold release means for releasing the movable mold body diagonally outward at an arbitrary inclination angle with respect to the fixed mold body.

(Function) The formwork device of the present invention forms a cavity by each molding surface of the fixed mold body and the movable mold bodies on both sides,
A sheath pipe is horizontally suspended in an inclined state so as to cross the inside of the cavity between the movable bodies on both sides, and concrete is poured and cured inside the cavity.

Further, when the movable mold bodies on both sides are to be released from the mold, when the mold release means is activated, one of the movable mold bodies is unlocked by the mold release means, and the movable mold body on the other side is released from the mold. becomes free with respect to the direction of inclination of the sheath tube, and therefore, one movable molded body is smoothly released from the mold diagonally outward in the direction of inclination of the sheath tube.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, 1 is a base, and this base 1 is formed by a plurality of vertical frames 2 and a plurality of horizontal frames 3 arranged between each of the vertical frames 2 to extend in the front-rear direction with a predetermined width. ing. Further, a fixed mold body 5 is fixed on the support plate side frame at the middle upper part of the base 1, and this fixed mold body 5
A molding surface 6 is formed horizontally in the front-rear direction of the upper surface, and molding portions 7 are formed at both ends of the molding surface 6 in the width direction.
is installed protrudingly.

Further, 8 is the fixed mold body 5 on the base 1.
The left and right movable bodies 8 have a narrow plate-shaped base frame 9 extending in the front-rear direction, and the front, rear, and intermediate portions of the base frame 9 A prismatic main frame 10 is erected in the section, and narrow plate-shaped support frames 11 are erected on both sides of the main frame 10 and on the base frame 9 at positions in the front and back direction. A molding plate 13 having a molding surface 12 is fixedly supported at the inner end of the main frame 10 and each support frame 11 . The molding surface 12 of the molding plate 13 has a vertical molding part 14 at the lower part thereof, which forms the installation body part of the bridge girder block together with the molding surface 6 of the fixed mold body 5. A vertical molded part 16 for forming the leg part of the bridge girder block is connected to the upper part through an inclined molded part 15 that is inclined inwardly and upwardly. An inclined molded part 17, a horizontal molded part 18, and a vertical molded part 19, which are inclined upwardly on the outside, which form the undercut surface and the outer end of the horizontal protrusion, are successively arranged outwardly.

Further, in the vicinity of the upper end of each of the left and right main frames 10, an insertion hole 20 for inserting a sheath tube, which penetrates the vertical molded part 19 of the molded surface 12, is shifted in the front-rear direction and tilted at a predetermined inclination angle. A jig 21 for fixing the sheath tube is attached to the inner opening edge of the insertion hole 20. Further, a prismatic connecting body 22 is fixed to the outer lower end of the main frame 10 in the intermediate portion, and this connecting body 2
A vertical support shaft 23 is provided protruding from the lower end of 2.

Next, a substantially fan-shaped rotary board 24 is provided at the upper middle part of the left and right parts of the base 1 in the front-rear direction, and is rotatable in the horizontal direction.
Guide rails 25 having a U-shaped cross section are fixedly mounted on the guide rails 4 in parallel to each other in the left-right direction. Further, left and right wheels 27 of the movable cart 26 are rotatably engaged with the opposing guide rails 25. In this movable trolley 26, bearing pieces 29 are opposed to each other at the left and right front and rear parts of the main body 28 and protrude in the left and right direction, and an axle 30 is supported in the front and rear direction between the left and right front and rear bearing pieces 29. The wheels 27 are rotatably mounted on both front and rear ends of the truck body 2.
A sliding hole 31 is vertically bored in the center of 8,
The vertical support shaft 23 is slidably inserted into the sliding hole 31 via a sleeve 32 and supported. The opposing guide rails 25, a movable cart 26 having left, right, front and rear wheels 27, and a vertical support shaft 2
3, the fixed body 5
a support mechanism 33 that supports the movable mold body 8 movably in the left and right direction so that the movable mold body 8 can be molded and released from the mold;
is configured.

Reference numeral 34 denotes a mold release means for releasing the left and right movable mold bodies 8 obliquely outward at an arbitrary inclination angle with respect to the fixed mold body 5, and the left and right mold release means 34 are as follows:
Abutments 36 are fixed on the bottom plates 35 on the left and right sides of the base 1, and a rotation center shaft 37 is erected on the abutments 36 on the left and right sides. Also, this rotation center shaft 37
The worm wheel 39 is inserted through the sleeve 38.
is rotatably inserted and supported through the insertion hole 40, and the lower surface of the rotary base plate 24 is fixed to a boss 41 projecting from the upper part of the worm wheel 39. Further, a support frame 42 is fixed on the bottom plate 35 on the left and right sides of the support stand 36, and an operating shaft 4 is attached to a bearing body 43 fixed on the support frame 42 on the left and right sides.
A worm 45 that meshes with the worm wheel 39 is fixed to the vicinity of the inner end of the operating shaft 44, and a worm 45 that engages with the worm wheel 39 is attached to the outside of the vertical frame 2 on the outside of the base 1. Projected operating shaft 4
A knob 46 is fixed to the protruding end of 4.
Further, a scale plate 47 is fixed to the left and right parts of the base 1 on the outer side of the left and right rotary base plate 24, and the rotary base plate 47 is fixed to the inner side of the left and right scale plate 47.
An arcuate guide recess 49 is formed to guide the rotation of the arcuate outer edge 48 that bulges outwards, and a scale 50 is displayed on the edge of the guide recess 49. It is designed to be pointed by a pointing piece 51 which has a triangular shape in plan view and projects outward from the center of the arcuate outer edge 48 of No. 24 .

Next, the operation of the above configuration will be explained.

First, when molding the respective mold bodies, when the left and right movable mold bodies 8 are moved toward the fixed mold body 5, the movable carts 26 of the left and right movable mold bodies 8 move through the left and right front and rear wheels 27. The left and right movable mold bodies 8 on the left and right movable carts 26 are moved toward the fixed mold body 5 along opposing guide rails 25, and the lower vertical molded portions 14 of the molding plates 13 of the left and right movable mold bodies 8 are moved toward the fixed mold body 5. The molding parts 7 are brought into contact with the molding parts 7 at both ends in the width direction, and the molding is performed. The fixed mold body 5 and the left and right movable mold bodies 8 are clamped by mold clamping means (not shown), and the molding surface 6 of the fixed mold body 5 and the molding surface 12 of the left and right movable mold bodies 8 are used to secure the bridge girder. A cavity 52 for block molding is formed. Next, both ends of the sheath tube 53 are inserted between the respective insertion holes 20 of the left and right movable mold bodies 8, and both ends of the sheath tube 53 are fixed with the jig 21. In this case, the opposing left and right insertion holes 20 through which each sheath tube 53 is inserted are tilted at a predetermined inclination angle with their positions shifted back and forth. Both end portions of each inclined sheath tube 53 and the insertion hole 20 inserted therethrough are arranged horizontally between the insertion holes 20 in a state of being inclined in the direction, with respect to the outward mold release direction of the movable mold body 8. The upper parts of the left and right movable mold bodies 8 are frictionally connected, and the upper parts of the left and right movable mold bodies 8 are locked from moving outward in a direction orthogonal to the fixed mold body 5. Further, when the connecting body 22 at the lower end of the left and right movable mold bodies 8 is moved in the direction of inclination of the sheath tube 53, the movable cart 26 is moved in the direction of inclination of the sheath tube 53 by the vertical support shaft 23. However, the left and right front and rear wheels 27 of this movable trolley 26 are frictionally coupled within the opposing guide rails 25, so that the lower portions of the left and right movable bodies 8 move outward in the direction orthogonal to the fixed body 5. It will be locked.

Next, when concrete is poured into the cavity 52 and cured, a bridge girder block A is formed. molding surface 1
Vertical molded part 14 and inclined molded part 1 in 2
5, and the leg parts b of the bridge girder block A are molded by the vertical molded parts 16 on the molding surfaces 12 of the left and right movable mold bodies 8, and the horizontal protruding parts c of the bridge girder block A are molded by the left and right molded parts 16. The movable mold body 8 is molded by an inclined molded part 17, a horizontal molded part 18, and a vertical molded part 19 on the molded surface 12, and in this horizontal protrusion c, there are a plurality of molded parts inclined in the front-rear direction. A sheath tube 53 is buried.

Next, when releasing the left and right movable mold bodies 8, the mold clamping means that clamped the left and right movable mold bodies 8 is activated to release the mold clamping, and the knob 46 of the mold release means 34 is operated. When the shaft 44 is rotated in one direction,
The worm wheel 39 is rotated by the worm 45 of the operation shaft 44 via the sleeve 38 about the rotation center axis 37, and the rotation base plate 24 having the worm wheel 39 is horizontally rotated. Opposing guide rail 2 on moving board 24
5 are simultaneously rotated in the same direction, and therefore, by adjusting the rotation of the knob 46, the opposing guide rails 25 are set to be inclined in the same direction as the inclination direction of each sheath tube 53. Note that when the angle of inclination of the sheath tube 53 is clear, the rotating base plate 24 is rotated according to the angle of inclination, and the indicator piece 51 is
is aligned with the scale 50 of the scale plate 47 whose inclination angle matches the inclination angle of the sheath tube 53. As a result, the opposing guide rails 25 are set to be inclined in the same direction as the inclination direction of each sheath tube 53. Further, the opposing guide rail 25 is rotated, and the movable trolley 26 is moved to the vertical support shaft 23 of the movable body 8 via the left, right, front and rear wheels 27 by the guide rail 25.
The movable trolley 26 is tilted in the same direction as the inclination direction of each sheath tube 53, and the movable trolley 26 is rotated horizontally around
The frictional connection between the left, right, front and rear wheels 27 of 6 is released,
The movable cart 26 becomes movable along the opposing guide rail 25.

Then, when the left and right movable bodies 8 are moved outward, the moving cart 26 of the left and right movable bodies 8 is moved outward along the opposing guide rails 25, and the left and right movable bodies 8 are moved outward. Each sheath tube 53
The mold is smoothly released diagonally outward in the direction of inclination.

In addition, when the sheath tube 53 is horizontally suspended between the left and right movable bodies 8, when it is horizontally suspended in a direction orthogonal to the left and right movable bodies 8 without being inclined at a predetermined inclination angle as described above. After molding the bridge girder block A, the left and right movable mold bodies 8 are released from the mold by the opposing guide rails 25 of the support mechanism 33 and the left and right front and rear wheels 27, without using the mold release means 34. can be moved outward as it is and released from the mold.

In the embodiment described above, the case where the mold release means 34 is provided for each of the left and right movable mold bodies 8 on the left and right sides of the base 1 has been described, but the mold release means 34 is not limited to this, and may be provided for one movable mold body 8 You can do it like this.

Note that this mold release means 34 may be shared by the left and right movable mold bodies 8, and the left and right movable mold bodies 8 may be simultaneously released diagonally outward by this mold release means 34. .

〔Effect of the invention〕

According to the present invention, since the base is provided with a mold release means for releasing at least one movable mold body diagonally outward, the movable mold body can be moved forward and backward with respect to the fixed mold by this mold release means. , it is possible to reliably release the mold diagonally outward at any inclination angle, and as a result, it is supported between movable mold bodies and is movable without being affected by the inclination angle of the sheath pipe buried in concrete. The mold can be released smoothly, and therefore,
For example, it is possible to provide a formwork device with excellent workability for molding bridge girder blocks.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view with a part of the formwork device omitted, Fig. 2 is a perspective view of one side of the same, and Fig. 3 is an exploded perspective view of the same. . 1... Base, 5... Fixed mold body, 6... Molding surface,
8... Movable mold body, 12... Molding surface, 34... Mold release means, 52... Cavity.

Claims (1)

[Claims] 1. A base, a fixed mold body fixed to the upper part of the base and having a molded surface on the upper surface, and the fixed mold body arranged on both sides of the fixed mold body on the base and on opposing inner sides. a movable mold body having a molding surface that forms a cavity together with the molding surface of the movable mold body, and at least one movable mold body provided on the base and releasing the movable mold body diagonally outward at an arbitrary inclination angle with respect to the fixed mold body. A formwork device comprising a mold release means.