JPH07133627A - Form for manufacturing underdrain block - Google Patents

Abstract

PURPOSE:To shorten the time and so save the labor for manufacturing underdrain blocks to be connected by PC steel bars. CONSTITUTION:A front end plate 60 is provided freely to be stood and fallen in a frame 50, and a rear end plate 70 coupled with the front end plate 60 through a coupling means 77 is provided freely to be moved forward and backward, and a core supporting beam 500 is horizontally projected from the rear end plate 70, and an upper core 110 and a lower core 120 connected by a L-type link 140 are provided so that they can be sealed at the time of enlarging width. A supporting time 130 is fixed to a ceiling of the upper core 110, and the supporting beam is loosely fitted, and an output end of a width enlarging mechanism 300 fixed to the lower surface of the supporting frame 130 is connected to the L-type link 140. Inserts 250 of a recessed part is provided at four corners of the core 100 freely to be appeared and disappeared through a mechanism 200, and a connection hole forming member 400 is provided so as to be freely engaged with the front end plate 60 from the rear end plate 70 through the insert 250 of the recessed part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork for producing an underdrain block, which is useful for shortening the production time and for labor-saving production of an underdrain block connected using PC steel bars.

[0002]

2. Description of the Prior Art Referring to FIG.
The underdrain blocks B1 and B2 connected by using steel bars will be described, and then the conventional formwork will be described with reference to FIGS.

FIG. 2 is a perspective view of the underdrain block. The underdrain block B1 shown in the upper part is provided with a recess 3 at the four corners of the central portion of the hollow hole 2, and a through hole passing through the recess 3 from both end surfaces. 4, the PC steel bar is inserted into the through hole 4 of the underdrain block B1 that is continuously provided, and the PC steel bar is connected and tensioned in the concave portion 3. Further, the underdrain block B2 shown in the lower part is a underdrain block with a small cross section, and has concave portions 3 for tightening the PC steel bar at the outer four corners of the central part, and the PC steel bar is also inserted into the through hole 4. , PC bar steel is connected and tensioned in the recess 3.

FIG. 17 shows a prior art form (underdrain block B1).
Is an exploded perspective view of FIG.
A front gable plate 30 and a rear gable plate 31, which are openable and closable,
Similarly, both openable and closable side plates 40, 40 are provided on the underframe 10, and the core 20 has a substantially inverted U-shaped width that can be reduced (by a screw jack type expansion / contraction mechanism) and a removable bottom part 20b. And the recessed portion inserts 45 are provided at the four corners of the center of the core frame by detachably screwing from the mounting holes 22 inside the core 20, and the insertion holes are formed in the front end plate 30 and the recessed inserts 45. h
1, h2 are bored, and the rear end plate 31 is provided with a fitting hole h3,
The rod R fitted with the vinyl pipe V is inserted from the insertion hole h1 of the front end plate 30 and passed through the insertion hole h2 of the recessed part insert 45,
It is provided so that it can be fitted into the fitting hole h3 of the rear gable plate 31, and constitutes a formwork for producing an underdrain block.

In the conventional formwork having the above-mentioned structure, when the formwork is assembled, a wire mesh (not shown) is placed on the bottom surface portion 15 of the formwork,
The front and rear part gable plates 30 and 31 are raised and temporarily fixed, and the reduced core frame 20a is inserted through the opening 33 of the front and rear part grate plates to span the core frame 20a and the bottom part 20b. It is sandwiched and fixed to the core frame 20a, and the recessed part insert 45 is inserted into the core frame 4
It contacts the predetermined position of the corner, and another worker enters the inside of the core and is screwed from the inside. Next, through the insertion hole h1 of the front gable plate 30 and the insertion hole h2 of the recessed part insert 45, the vinyl pipe V
(If it is not covered with a vinyl pipe, it will be difficult to pull out the bar material at the time of demolding.) Insert the bar material R fitted outside and insert the rear end plate 3
After fitting in the fitting hole h3 of No. 1, the left and right side plates 40, 40 are raised and the whole mold is tightened, the process of assembling the mold is completed.

At the time of demolding, the bar R is pulled out from the insertion hole h1 of the front end plate 30 and enters the inside of the core to insert the recessed part insert 50.
After removing the fixing bolt of the
b is removed and carried out to the outside of the core, the core frame 20a is reduced and carried out to the outside of the form, and both side plates 40 and 40 and the front and rear part end plate 3
0, 31 are knocked down, the underdrain block B1 is removed from the mold, the worker enters the hollow part, removes the four recessed part nests 45, and finally the four vinyl pipes V from the through hole 4 are inserted. To complete the demolding process.

FIG. 18 shows a prior art form (underdrain block B2).
FIG. 19 is an explanatory view of a side plate portion of a conventional technology formwork (for underdrain block B2). A prior art form will be described with reference to both figures.

The prior art mold (for underdrain block B2) shown in FIG. 18 has substantially the same structure as that of the underdrain block B1. Since the concave portion 3 is formed on the outer side, the form for the underdrain block B1 is used. The recessed part insert 4 screwed to the core frame 20a
5, the recessed part inserts 50 are detachably screwed to the upper and lower parts of the central portions of the both side plates 40, 40. The front and rear end plates, cores, rods and vinyl pipes to be fitted are shown in FIG. Underdrain block B
It has the same structure as the mold for 1.

In the prior art mold (for underdrain block B2) having the above-mentioned structure, when the mold is assembled, a wire mesh (not shown) is placed on the bottom surface 15 of the mold and both side plates 40, 40 are raised and temporarily fixed, In the openings K, K of the front and rear gable plates, the reduced core frame 20a is inserted and straddled, the core frame 20a is widened, and the bottom 20b is sandwiched and fixed in the core frame, As shown in FIG. 19, the recessed part insert 45 is screwed to predetermined positions of the left and right side plates with a bolt, and the recessed part insert 4 is inserted from the insertion hole h1 of the front end plate 30.
Vinyl pipe V through the insertion hole h2 of 5 (without covering the vinyl pipe, it becomes difficult to pull out the bar at the time of demolding.)
The rod R fitted outside is inserted into the fitting hole h3 of the rear end plate 31.
Then, the left and right side plates 40, 40 are raised to tighten the whole mold, and the process of assembling the mold is completed.

Further, at the time of demolding, the bar R is pulled out from the insertion hole h1 of the front end plate 30, and the core frame 20a to the bottom 20 are removed.
b is removed and carried out to the outside of the core, the core frame 20a is reduced and carried out to the outside of the form, and as shown in FIG.
After pulling out the fixing bolt of the recessed part insert 45 from 40,
As shown by the chain double-dashed line, both side plates 40, 40 are laid down, front and rear gable plates 30, 31 are laid down, and the underdrain block B1 is demolded from the outside of the form frame, and the four recesses attached to the corners of the underdrain block. The part insert 45 is removed, and finally four vinyl pipes V are pulled out from the through hole 4 to complete the demolding process.

Since the former and the latter molds go through complicated processes, it takes about 40 minutes from 4 to 5 workers from the product demolding to the mold reassembling process. Is a crane
Equipment such as forklifts is indispensable and there is a high risk associated with work. The applicant conducted an investigation, but found no underdrain block manufacturing formwork that made it possible to insert and remove the recessed part inserter without removing the core.

[0012]

In addition to eliminating the disadvantages of conventional molds, the removal of cores is not required, mold removal and mold assembly can be easily performed, and manufacturing time and labor can be reduced. To provide a formwork for use.

[0013]

In order to solve the above-mentioned problems, according to claim 1, in an underdrain block manufacturing form having openable and closable front and back grate plates, both side plates and a core, the underframe is raised and lowered. An interlocking device is provided between a freely movable front gable plate and a rear gable plate that is pivotally movable back and forth, a supporting beam is horizontally projected from the rear gable plate side, and the core can be sealed. The upper core and the lower core are separately provided, the upper core and the lower core are rotatably connected by an L-shaped link, and a support frame is fixed to a ceiling portion of the upper core. An expansion / contraction mechanism in which a support beam is fitted into the support frame and a base is fixed to the lower surface of the support frame is provided, and the output end of the expansion / contraction mechanism is connected to the left and right L
A recessed hole insert member that is connected to the front end of the mold link and is capable of appearing and disappearing in the holes formed at the four corners of the core through an appearing and retracting mechanism, and a round bar-shaped connecting hole forming member for the rear end plate and the recessed member insert member. A formwork for manufacturing an underdrain block is provided, which is detachably provided in an insertion hole of a front end plate.

According to a second aspect of the present invention, in a form for producing an underdrain block which is provided with front and rear gable plates which can be opened and closed, both side plates and a core, a front gable plate which is provided on an underframe so as to be tiltable, and which can be moved back and forth. Interlocking means is provided between the pivoted rear gable plates, a supporting beam is horizontally projected from the rear gable plate side, and the core is separately provided in an upper core and a lower core that can be sealed, The upper core and the lower core are rotatably connected by an L-shaped link, the support frame is fixed to the ceiling of the upper core, the support beam is press-fitted, and the base is attached to the lower surface of the support frame. A fixed expansion and contraction mechanism is provided, the output end of the expansion and contraction mechanism is connected to the left and right L-shaped link tips, and the recessed part nest is fixed to the upper center of both side plates that can be tilted up and down, and the lower center is drilled. A recessed part nest is provided in the hole so that it can be retracted and retracted via a retractable mechanism.
A form for producing an underdrain block is characterized in that a round bar-shaped connecting hole forming member is provided so as to be freely inserted into and removed from the insertion holes of the rear gable plate, the recessed part insert, and the front gable plate.

According to a third aspect of the present invention, the round bar-shaped connecting hole forming member is a hard material having a different diameter at both ends, which is formed by hard plating or thermal spraying of a hard material. It constitutes the core device of the formwork for the underdrain block manufacturing.

[0016]

According to the first aspect of the present invention, when the underdrain block is released from the mold (when it is taken out of the form), the connecting hole forming member is pulled out from the rear end plate side of the form, and then the tightening bolts are loosened. If you open, the rear gables will move backwards while interlocking with the front gables, and at the same time, both side plates that were fitted in the fitting holes of the front and rear gable plates and the positioning pins of the core will come out and open both side plates. And core can be reduced, then open both side plates and insert core 4
By rotating the retracting mechanism of the recessed parts installed in the corners in the respective predetermined directions, the recessed part inserts protruding outside the core are recessed into the core, and the expansion / contraction mechanism installed in the core is moved in the specified direction. If the rotation operation is performed, the width of the lower core starts to decrease and the inside of the upper core starts to rise. If the rotation operation further progresses, the width of the upper core follows the contraction of the lower core to reduce the width. However, the lower core further rises into the upper core and the cross section of the core shrinks. If the underdrain block is slightly lifted and pulled forward, the underdrain block B1 (Fig. 2) can be easily demolded in a short time.

Further, at the time of pouring (when pouring concrete),
When the expansion / contraction mechanism installed in the core is rotated in the reverse direction, the upper core begins to widen, and if the rotation operation further proceeds, the lower core will follow the expansion of the upper core and widen and descend. , The separation part of the upper core and the lower core is attached and sealed, the whole core returns to the proper size before shrinking, and if the retracting mechanism provided at the four corners of the core is operated, the recessed part can be inserted. Project to the outside of the four corners of the core, then close both side plates and close the front end plate, the rear end plate advances, tighten the tightening bolts, and insert the connecting hole forming member from the rear end plate side through the recessed part insert If you fit it to the gable plate, you can immediately place it.Since all the operations of the expansion / contraction mechanism, the retracting mechanism, the tightening bolts, etc. are simple turning operations, you can also operate it with simple pneumatic pressure / power tools, and it is a stationary type. Alternatively, the production time can be shortened and the labor can be saved in any production line of the moving line system.

According to a second aspect of the present invention, when the underdrain block is released from the mold, after pulling out the connection hole forming member from the rear end plate side of the form, the concave portion which is projected by operating the retracting mechanism at the lower center of both side plates. If the inserter retracts from the inner surface of the side plate, loosens the tightening bolts and opens the front gable plate, the rear gable plate moves backward while interlocking with the front gable plate, and at the same time both sides that were fitted into the fitting holes of the front and rear gable plates. The positioning pins of the plate and the core can be removed to open both side plates and shrink the core. Next, if the expansion / contraction mechanism installed in the core is rotated in a predetermined direction, the width of the lower core is reduced and the core starts to move up into the upper core. Following the reduction of the lower core, the width is reduced, the lower core rises into the upper core, and the cross section of the core shrinks.If you slightly lift the underdrain block and pull it forward, The underdrain block B2 (see FIG. 2) can be easily demolded in a short time while remaining in the mold.

Further, at the time of driving, if the expansion / contraction mechanism provided in the core is rotated in the reverse direction, the upper core starts to widen, and if the rotating operation further proceeds, the lower core will follow the widening of the upper core. It moves and widens and descends, the upper core and lower core separating parts are attached and sealed, the entire core returns to the proper size before reduction, and the retracting mechanism installed on both side plates is applied. If operated, the recessed part nest protrudes inside the side plate.Next, if both side plates are closed and the front end plate is closed, the rear end plate advances and tightens the tightening bolts.
If the connecting hole forming member is inserted into the front gable plate from the rear gable plate side through the recessed part insert, it can be placed immediately. All the operations of the expansion / contraction mechanism, retracting mechanism, tightening bolts, etc. are simple turning operations. Therefore, it can be operated with simple pneumatic and electric tools, and time can be saved and labor can be saved in both stationary and moving line production lines.

According to the third aspect of the present invention, when the connecting hole forming member is urged in the large diameter direction of the axis by the drawing device of the production line at the time of demolding, the adhesion strength between the surface of the connecting hole forming member and the concrete is weak. Therefore, the contact surface is momentarily peeled off and the connecting hole forming member can be easily pulled out, and since the contact surface has high hardness, there is little wear and damage and the durability is improved.

Further, at the time of placing, after the molds are tightened, the connecting hole forming member can be easily connected from the rear end plate side by fitting the connecting hole forming member into the fitting hole of the front end plate through the insertion hole of the recessed part insert. The setting of the hole forming member is completed.

[0022]

1 and 3 to 16 show an embodiment of the present invention. FIG. 1 is a perspective view of a formwork for producing an underdrain block according to claim 1, and FIG. 2 is a PC steel bar. FIG. 3 is a perspective view of the underdrain block to be connected, FIG. 3 is a front view of the formwork for producing the underdrain block according to claim 1, FIG. 4 is an explanatory view of the interlocking mechanism of the front and rear gable plates, and FIG. 5 is a perspective view of the retractable mechanism. 6 is a front view of the first embodiment of the expansion / contraction mechanism, FIG. 7 is a plan view of the first embodiment of the expansion / contraction mechanism, and FIG. 8 is a front view of the second embodiment of the expansion / contraction mechanism.
Is a front view of the second embodiment of the expansion / contraction mechanism, FIG. 10 is an operation explanatory view of a core, FIG. 11 is a perspective view of a form for producing an underdrain block according to claim 2, and FIG. FIG. 13 is a front view of a formwork for producing an underdrain block according to FIG. 13, FIG. 13 is an explanatory diagram of a retracting mechanism of a side plate portion, FIG. 14 is an operation explanatory diagram of a core, and FIG. FIG. 16 is an explanatory view of a connecting hole forming member, FIG. 17 is an explanatory view of a conventional technology mold, FIG. 18 is an explanatory view of a conventional technology mold, and FIG. 19 is a side plate portion of the conventional technology mold. FIG.

The structure and operation of each embodiment and the underdrain block to be manufactured will be described below with reference to FIGS. 1 to 16.

FIG. 1 is a perspective view of a form for producing an underdrain block according to claim 1, which is a form for producing an underdrain block for producing the underdrain block B1 shown in FIG. (Hereinafter, abbreviated as K), the core 100 is widened and a wire mesh (not shown) is externally fitted to the core, and then the recessed part insert 250 is projected, and the front end plate 60, the rear end plate 70, and the side plates 80, 8 are formed.
0 (one side plate is omitted) before closing in the direction of the two-dot chain line arrow (before placing), and the two-dot chain line is the underdrain block B1. The schematic configuration will be described below with reference to the drawings.

The form K is an underframe 50 to which a bottom surface 55 is attached.
In addition, the both side plates 80, 80 and the front gable plate 60 are hinged so as to be openable and closable, and the rear gable plate 70 is erected so as to be movable back and forth through the interlocking means with the front gable plate 60. The upper core 110 having a substantially inverted U-shaped cross section provided with a flexible portion and the lower core 120 having a substantially U-shaped cross section similarly provided with a flexible portion are separately provided, and the upper core 110 and the lower core are provided. An expansion / contraction mechanism 30 to be described later is provided by connecting the cores 120 with L-shaped links so that they can be sealed when expanded.
0 inside, and in the hole 150 of the core 4 corner 101,
A recessed portion insert 250 that can be retracted by an internally retractable mechanism 200 (described later) is provided, and a support beam 500 (described later) that is horizontally projected from the rear end plate 70 side is provided inside a support frame 130 having a gap. And is supported movably in the upward / backward / leftward / rightward directions, and the connection hole forming member 400 is inserted into the insertion hole 74 formed in the rear end plate 70.
0 is provided so that it can be fitted into the fitting hole 64 of the front end plate 60 through the insertion hole 254 of the recessed part insert 250, and the upper core 1 is used as a positioning mechanism when the mold is assembled (when the mold is tightened).
A sharp positioning pin P having a diameter equal to or larger than the core movement amount is provided at both ends of the lower core 10 and the lower core 120 to project the front and rear end plates 6.
Positioning holes 66a and 76a are provided at corresponding positions of 0 and 70, sharp positioning pins Pb are provided at both ends of both side plates 80, and positioning holes 68b and 78b are also provided at corresponding positions of the front and rear end plates 60 and 70. At the time of tightening the mold by the tightening mechanism 90 of the interlocking means, which will be described later, the proper positions of the respective members are held.

FIG. 3 is a front view of the formwork for manufacturing the underdrain block according to claim 1, omitting the front end plate 60 of the form K, the bearing portion at the front of the retracting mechanism 200, the tightening means 90, etc. The core 100 is shown in a widened state.

As described above, the core 100 has an upper core 110 in which a flexible portion be is provided in a corner portion of a substantially inverted U shape, and a lower portion in which a flexible portion be is provided in a corner portion of a substantially U shape. The upper core 110 is provided with a support frame 130 for loosely inserting the support beam 500 in the ceiling portion of the upper core 110 with a gap g, and the upper separating portion 115.
The link mounting portion 115a is provided inside, and the link mounting portion 125a is also provided inside the lower separating portion 125 of the lower core 120. The link mounting portion 115a of the upper core 110 and the link mounting portion 125a of the lower core 120 are provided. In between, L-shaped link 140
The upper connecting hole 141 and the lower connecting hole 142 are connected to each other so that the upper and lower cores 110 and 120 can be sealed when the width is increased, and the lower surface of the support frame 130 is expanded / contracted to convert the rotational movement into a lateral expansion / contraction movement. The bearing 370 of the mechanism 300 (described later) is fixed, the orthogonal joint 350, which is the output end of the expansion / contraction mechanism 300, is connected to the tip connection hole 143 of the L-shaped link 140, and the upper and lower cores 110, 120 are connected. The corner hole 101 is provided with a hole 150 through which the recessed part insert 250 can be projected and retracted.
A support beam 500 (described later) that is provided inside the recessed portion 250 is connected to a retractable mechanism 200 (described later) that converts rotational movement into vertical movement, and horizontally protrudes from the rear end plate 21 side. Is loosely inserted into the support frame 130 so that the core 100 is supported so as to be movable in the upward, forward, backward, and leftward and rightward directions when the underdrain block is removed from the mold. Next, the interlocking means of the front and rear gable plates will be described.

FIG. 4 is an explanatory view of the interlocking means of the front and rear end plates. The interlocking means 77 is shown in a sectional view taken along the line AA in FIG. 1, and the expansion / contraction mechanism 300 and the retracting mechanism 2 installed in the core 100 are shown.
00 and the like are omitted, the interlocking means 77 is the front and rear end plate 6
Tightening mechanism 90 (shown in a perspective view in the lower part of the figure) for tightening and releasing the entire side frame 80, 80 and the core 100 and the like through 0, 70, and the front and rear part end plates 60, 70 and both side plates. 8
The positioning mechanism is provided between the 0 and 80 and the core 100, and the interlocking mechanism 75 and the like that moves the rear end plate 70 backward by interlocking with the opening of the front end plate 60.

First, the tightening mechanism 90, which is one of the interlocking means 77, will be described. In the tightening mechanism 90, the left screw 92L is engraved at the front end of the screw rod 92 provided with the rotating head 91, and the rear end is formed. Right screw 92R is engraved on the portion and is fitted into the support beam 500,
Limiting rod 9 for limiting the turning range to 90 ° on the left screw 92L portion
3 is screwed into a rectangular tightening nut 94 protruding inward,
The limiting rod 93 is inserted into a limiting groove 509 having a quarter circumference provided on the front end surface of the support beam 500, and a rear tightening nut 95 having both ends pivotally attached to the rear end plate 70 is screwed into the right screw 92R portion. And a rectangular hole 62 is formed in the front end plate 60 at a position corresponding to the tightening nut 94 so that the tightening nut 94 can slip through when it is horizontal.

The interlocking mechanism 75 has an interlocking arm 65 projecting from the lower part of the front end plate 60 hinged to the underframe 50 and the rear end plate 7.
In the lower part of 0, a rotatably supporting part 72 in which wheels are installed is projected in the horizontal direction, and engages with a rail part 52 at the rear part of the underframe 50 so as to be movable back and forth.
The interlocking arm 65 and the rear end plate 70 pivotally supported are connected via an interlocking rod 67, and the interlocking rod 67 is provided with a turnbuckle-shaped length adjusting portion 67t.

The tightening mechanism 90 and the interlocking mechanism 7 having the above structure.
The operation of 5 will be described. First, the connection hole forming member 4 at the time of demolding.
00, and the turning head 9 of the screw rod 92 of the tightening mechanism 90.
When 1 is rotated counterclockwise, the upright tightening nut 94 loosens and moves forward, but due to the friction with the screw rod, it rotates leftward and becomes horizontal as shown in the drawing. It becomes possible to slip through the rectangular hole 62 of 60, and the interlocking rod 6 connected to the interlocking arm 65 by opening the front end plate 60.
7 is pushed backward and the rear end plate 70 is retracted, the fitting between the positioning holes 68b and 78b of the front end plate 60 and the rear end plate 70 and the positioning pins Pb of both side plates is released, and both side plates 8
0,80 opening is possible, and at the same time, the fitting of the sharp positioning pins P provided at both ends of the core 100 and the positioning holes 66a, 76a of the front and rear end plates 60, 70 is released, and the core mechanism is operated by the expansion / contraction mechanism 300. 100 can be reduced.

Next, the operation of assembling the formwork will be described. First,
After the steps such as widening the core 100, attaching a wire mesh (not shown), projecting the recessed portion insert 250, etc. are completed, and the side plates 80, 80 are raised and the front end plate 60 is closed, the rear end plate 70 interlocks with the rod 6.
7, the positioning holes 66a and 76a of the front end plate 60 and the rear end plate 70 are simultaneously engaged with the corresponding side plates 80 and the positioning pins Pb and P of the core 100. , A positioning hole 68b in the rear gable plate 70,
78b and the corresponding side plates 80 and the positioning pin Pb of the core 100 are also fitted at the same time. Next, when the turning head 91 of the tightening means 90 is rotated to the right, the tightening nut 94 in the horizontal state is removed. Due to the friction with the screw rod, it rotates clockwise to the upright position and stops. If it is further tightened, the front and rear end plates 60 and 70 are pressed by the tightening nut 94 and the rear tightening nut 95, and if tightened to a predetermined position, the form K (Or the mold K2) is tightly fitted at a proper position, and if the connecting hole forming member 400 is inserted, it can be immediately placed.

FIG. 5 is a perspective view of an embodiment of the retracting mechanism. In the retracting mechanism 200, a left screw 220L is engraved on the front part of a screw rod 220 having a rotating head 210, and a right screw 220R on the rear part.
The left screw 220L part is screwed with the nut member 22LN provided with the shaft mounting portions 23 at both ends, and the right screw 220R part is also screwed with the nut member 22LN provided with the shaft mounting portions 23 at both ends. , One end of the link 230 is axially attached to each of the axial attachment portions 23, and the other ends are gathered, axially attached to the lower portion of the recessed portion insert 250, the screw rod 220 is supported by the bearing portion 215, and the core 100 of the core 100 is attached. The four corners 101 are fixed to the inside of the hole 150.

Next, the operation of the retracting mechanism 200 will be described. When the rotating head 210 is rotated clockwise, the nut member 22LN screwed into the left screw 220L and the nut member 22RN screwed into the right screw 220R approach each other. The link 230 causes the recessed part insert 250 to project, and the rotating head 21
When 0 is rotated clockwise, the nut member 22LN screwed into the left screw 220L and the nut member 22 screwed into the right screw 220R.
The RNs are separated from each other, and the link 230 has a recessed part insert 250.
Since all the operations to immerse the robot can be performed by simple rotating operations, it is possible to operate even with simple pneumatic / power tools, which saves time and saves labor.

FIG. 6 is a front view of the first embodiment of the expansion / contraction mechanism, and the bearing portion 370 also serving as the base is shown by a chain line. FIG. 7 is a plan view of the first embodiment of the expansion / contraction mechanism. Both figures show the expansion / contraction mechanism 300 in an expanded state. The configuration and operation will be described in detail below with reference to both drawings.

The expansion / contraction mechanism 300 shown in FIGS. 6 and 7 is a link mechanism for converting the rotational movement of the screw 320 into a lateral expansion / contraction movement. The orthogonal joints 350 provided on the left and right as output ends are connected to the L-shaped link. 140 (upper core 110 and lower core 120
Are connected. ) For expanding / contracting the core by connecting to the tip connecting hole 143, the screw rod 320 having the left screw 320L engraved on the front part and the right screw 320R engraved on the rear part is connected in series by the connecting fitting 360. The rotary head 310 is provided at the tip end of the screw rod 320, and the left screw 320L and the right screw 3 of the screw rod 320 are provided.
20R part, connection holes Na on both sides parallel to the threaded rod 320 axis
The nut LN and the nut RN provided with are respectively screwed, the horizontal shaft portion 34a of the tip of the orthogonal joint 340 is axially attached to the connection hole Na of the nut LN and the nut RN, and the link 345 is attached to the vertical shaft portion 34b of the orthogonal joint 340. The one end of the
The other end hole portions of 45 are assembled and axially attached to the vertical shaft portion 35a of the second orthogonal joint 350 which is the output end.
0 of the horizontal hole portion 35b is the tip connecting hole 1 of the L-shaped link 140.
43 is provided so that it can be attached to the shaft 43, and a bearing portion 370 provided on the base portion supports a key portion of the screw rod 320. At the time of expansion / contraction, the left and right mechanisms are configured to be swingable as indicated by arrow y as the expansion / contraction progresses. .

The operation of the expansion / contraction mechanism 300 having the above-described structure will be described. When the rotating head 310 of the screw rod 320 is rotated counterclockwise at the time of demolding, the nut LN and the right screw 32 of the left screw 320L portion are rotated.
The nuts RN of the 0R portion are separated from each other, the link 345 expands, the orthogonal joint 350 is attracted inward, and the tip connecting hole 143 of the L-shaped link 140 is pulled to pull the core 100.
Shrinks. In addition, when the rotary head 310 of the screw rod 320 is rotated to the right when the formwork is assembled, the nut L of the left screw 320L portion is
N and the nut RN of the right screw 320R part approach each other, the orthogonal joint 350 is pushed outward, the tip connection hole 143 of the L-shaped link 140 is pushed, and the core 100 is widened.

FIG. 8 is a front view of a second embodiment of the expansion / contraction mechanism, and the bearing portion 360 also serving as a base is shown by a chain line. FIG. 9 is a plan view of the second embodiment of the expansion / contraction mechanism. Both figures show the expansion / contraction mechanism 300b in an expanded state. The configuration and operation will be described in detail below with reference to both drawings.

The expansion / contraction mechanism 300b shown in FIGS. 8 and 9 is a mechanism for converting the rotational movement of the screw rod 320 into lateral expansion / contraction movements, and the orthogonal joints 350 provided on the left and right as output ends,
The core 320 is connected to the tip connecting hole 143 of the L-shaped link 140 to expand and contract the core. A screw 320 having a left screw 320L engraved on the front part and a right screw 320R engraved on the rear part is connected by a connecting fitting 360. The rotary nut 310 is connected in series, and a rotary head 310 is provided at the tip, a cylindrical nut LN is screwed into the left screw 320L portion, and a similar cylindrical nut RN is also attached to the right screw 320R portion.
Connection hole 3 that is provided by screwing and is externally fitted to the nut LN at one end
4a and a right connecting member 340a provided with a double clevis portion and a vertical shaft 34b at the other end, a connecting hole 34a for externally fitting the nut RN and a single clevis portion at the other end, and a vertical shaft 34 at the other end.
The clevis portions of the left connecting member 340b provided with b are inserted into each other, and the respective connecting holes 34a are overlapped (the left and right connecting members may be configured as shown in the lower right of the drawing) to form the nut LN and the nut RN. To the right connecting member 340a and the left connecting member 3
40b is swingably connected to the right connecting member 340a.
And the link 3 to the vertical shaft 34b of each of the left connecting member 340b.
45 has one end hole portion pivotally attached thereto, and the other end hole portions of the link 345 are gathered together and attached to the vertical shafts 35a of the left and right orthogonal joints 350, and the horizontal axis 35b of the orthogonal joint 350 is connected to the L-shaped link. The tip connecting hole 143 of the shaft 140 is provided so as to be axially attached, and the screw rod 3
20 bearings are supported by a bearing 370 provided at the base, and the left and right mechanisms are configured to be swingable as indicated by arrow y as the expansion and contraction progress during expansion and contraction.

The operation of the expansion / contraction mechanism 300b having the above-described structure will be described. When the turning head 310 of the screw rod 320 is rotated counterclockwise at the time of demolding, the nut LN and the right screw 3 of the left screw 320L are rotated.
The nuts RN of the 20R portion are separated from each other in the direction of the arrow, the link 345 expands, the orthogonal joint 350 is attracted inward, and the tip connecting hole 143 of the L-shaped link 140 is pulled to shrink the core 100. In addition, when mounting the formwork, the screw rod 3
If the rotating head 310 of 20 is rotated clockwise, the left screw 320L
The nut LN of the portion and the nut RN of the right screw 320R portion approach each other, the orthogonal joint 350 is pushed outward, the tip connecting hole 143 of the L-shaped link 140 is pushed, and the core 100 widens. The operation of the expansion / contraction mechanism 300b of the second embodiment is the same as that of the first embodiment, but there are advantages that the processing is easy because there are few connecting points, rattling is less likely to occur, and the durability is improved.

The respective embodiments of the expansion / contraction mechanism described in detail above are effectively applied to the expansion / contraction of the mold K and the core of the mold K2 described later.

FIG. 10 is a diagram for explaining the operation of the core.
(A) shows the core 100 before reduction of the form K, and the core 4
The recessed part insert 250 provided in the corner is set in the core 100 by the operation of the retracting mechanism 200 described in FIG. FIG. 10B is a diagram showing the core 100 when it is contracted,
The state before demolding in which the core is contracted by the operation of the rotary head 310 of the expansion / contraction mechanism 300 is shown. The expansion / contraction operation of the core 100 will be described in detail below with reference to FIG.

The core 100 in the widened state shown in FIG.
Is the expansion / contraction mechanism 300 (or 30
0b) turning the turning head 310 counterclockwise, the left screw 320
The nut LN of the L portion and the nut RN of the right screw 320R portion start to separate from each other, the link 345 starts to pull the orthogonal joint 350 inward, and the tip connecting hole 14 of the L-shaped link 140
3 is pulled, the upper separating part 115 of the upper core 110 and the lower separating part 125 of the lower core 120 begin to separate, and at the initial point of core contraction, the lower core 120 is connected to the L-shape. With the upper end connecting hole 141 of the link 140 as the center of rotation, the L
While being drawn by the lower end connecting hole 142 of the die link 140 to reduce the width inward, it begins to rise upward inward of the upper core 120, and if the reduction further proceeds, the line of action of the expansion / contraction mechanism 300 will change to the L-shaped link. The upper core 120 extends to the link attachment portion 125a of the upper core 120 via the upper core 120.
The width is reduced by following 0, and the lower core 110 rises into the upper core 120 while further reducing the width, and becomes the contracted state of FIG. Medium two-dot chain line 100A
Is the core outline before reduction. Next, the operation during widening will be described.

The core 100 in the contracted state shown in FIG.
When the rotating head 310 of the expansion / contraction mechanism 300 (or 300b) is rotated to the right at the time of widening, the nut LN of the left screw 320L part and the nut RN of the right screw 320R part start to approach each other, and the link 345 is orthogonal. The joint 350 starts to be pushed outward, the tip connecting hole 143 of the L-shaped link 140 is pushed, the upper core 110 begins to widen, and the lower core 120 uses the tip connecting hole 141 of the L-shaped link 140 as a fulcrum. The upper core 110 starts to widen while descending following the upper core 110, and when the widening progresses, the upper separating portion 115 and the lower separating portion 125 are abutted and sealed, and the widened state of FIG. 10A is restored. .

The core 100 is supported by the support frame 130.
Since the support beam 500 shown by the chain double-dashed line in the figure is supported with a gap g provided, if the underdrain block is slightly lifted and pulled forward at the time of demolding, the core naturally moves in a direction with less resistance. The mold can be easily removed in a short time, and when the mold is assembled, the core is naturally moved to the proper position by the fitting of the positioning pin, and the assembly process time can be shortened.

Next, with reference to FIGS. 11 to 16, a description will be given of the operation of forming the formwork for forming the underdrain block B2 according to claim 2 and the connecting hole forming member according to claim 3.

FIG. 11 is a perspective view of a formwork for manufacturing an underdrain block according to claim 2, which is the underdrain block B shown in FIG.
Formwork for underdrain block manufacturing (hereinafter,
After that, the core 100 is expanded and a wire mesh (not shown) is externally fitted to the core, and then the side plates 80, 8
0 (the recessed part insert 251 is fixed), then the retractable mechanism 200 is operated to project the recessed part insert 250 inside the side plate, and the front end plate 60 and the rear end plate 70 are moved in the direction of the two-dot chain line arrow. In the diagram showing the state before closing (before placing), the underdrain block B2 is indicated by a chain double-dashed line. The schematic configuration will be described below with reference to the drawings.

The frame K2 is an underframe 5 to which a bottom surface 55 is attached.
0, the both side plates 80, 80 and the front gable plate 60 are hinged so as to be openable and closable, and the rear gable plate 70 is erected so as to be movable back and forth through the interlocking means with the front gable plate 60. Is separated into an upper core 110 having a substantially inverted U-shaped cross section having a flexible portion and a lower core 120 having a substantially U-shaped cross section having a flexible portion, and the upper core 110 and the lower core are separated. L-shaped link 140 between cores 120
The expansion / contraction mechanism 3 which will be described later is provided so that it can be sealed at the time of widening.
00 is internally provided, a recessed part insert 251 is fixed to the upper side of the center of both side plates 80, 80, and a hole 85 is formed in the lower part of the center where the recessed part insert 250 can be retracted. The recessed part nest 250 is connected to the retractable mechanism 200 in 85 so as to be retractable.
A support beam 500 protruding horizontally from the rear gable plate 21 side
Is inserted into a support frame 130 having a gap between the cores 100 to support the core 100 so as to be movable in the upward, forward, backward, leftward and rightward directions, and the connection hole forming member 400 is inserted into an insertion hole 74 provided in the rear end plate 70. At this time, the connecting hole forming member 400 is provided so that it can be fitted into the fitting hole 64 of the front end plate 60 through the insertion hole 254 of the recessed part insert 250 and the recessed part insert 251 and the upper core 110 and the lower part. Sharp positioning pins P are provided at both ends of the core 120, positioning holes 66a, 76a are provided at corresponding positions of the front and rear end plates 60, 70, and sharp positioning pins Pb are provided at both ends of both side plates 80. Positioning holes 68b and 78b are also provided at the corresponding positions of the front and rear end plates 60 and 70 so that the proper positions of the respective members can be held when the mold frame is tightened by the above-mentioned tightening means 90. The underdrain block B2 is indicated by a chain double-dashed line in the figure.

FIG. 12 is a front view of a formwork for producing an underdrain block according to a second aspect of the present invention, in which the front end plate 60 of the form K2, the tightening means 90, etc. are omitted, and one side plate 80, 80 is opened. The recessed part nest 250 and the retracting mechanism 200 which are notched and recessed
, And the core 100 is shown in a widened state.

The core 100 has an upper core 110 provided with a flexible portion be at a corner having a substantially inverted U-shaped cross section, and a lower core 110 provided with a flexible portion be at the same corner having a substantially U-shaped cross section. A support frame 130 including a core 120, a support frame 130 having a gap g into which the support beam 500 is loosely inserted is provided on a ceiling portion of the upper core 110, a link attachment portion 115a is provided inside the upper separation portion 115, and a lower core 120 is provided. The link attachment portion 125a is provided inside the side separation portion 125,
The link attachment portion 115a of the upper core 110 and the lower core 12
The upper connecting hole 141 and the lower connecting hole 142 of the L-shaped link 140 are connected between the zero link mounting portions 125a, and the upper core 110 and the lower core 120 are provided so as to be sealed when widening,
A bearing portion 370 of an expansion / contraction mechanism 300 (described later) that converts rotational movement into lateral expansion / contraction movement is fixed to the lower surface of the support frame 130, and an orthogonal joint 350 that is an output end of the expansion / contraction mechanism 300.
Is provided so as to be connected to the tip connecting hole 143 of the L-shaped link 140, and the recessed portion nest 2 is provided in the upper part of the center of both side plates 80, 80.
51 is fixed, and a hole for allowing the recessed part insert 250 to be projected and retracted is provided in the lower center part, and the recessed part insert 25 is provided in the hole 85.
0 is provided slidably, and the recessed part insert 250 is provided by being connected to a retractable mechanism 200 (described later) that converts rotational movement into vertical movement, and is provided so as to project horizontally from the rear end plate 21 side. The beam 500 is attached to the support frame 13 provided with the gap g.
0, and is supported movably in the upward, forward, backward, leftward and rightward directions, and is inserted into the rear end plate 70 through the insertion hole 7 of the connection hole forming member 400.
4 is provided, and through the insertion hole 254 of the recessed part insert 250,
Provided so that it can be fitted into the fitting hole 64 of the front end plate 60,
Sharp positioning pins P are provided on both ends of the upper core 110 and the lower core 120 so as to correspond to the positioning holes 66a and 76a at the corresponding positions of the front and rear end plates 60 and 70.
Sharp positioning pins Pb are projectingly provided at both ends of the front and rear ends of the front and rear end plates 60, 70 at the corresponding positions.
b is provided so that the proper position of each member is maintained when the mold is tightened.

The interlocking means of the front and rear end plates of the mold K2 has the same operation as that of the mold K. Refer to FIG.

To page 11

Since it has been described in detail, the description thereof will be omitted.

FIG. 13 is an explanatory view of the retracting mechanism of the side plate portion.
1 is a diagram showing a cross-sectional view taken along the line BB of the side plate 80 of FIG.
3A shows a recessed state insert 250 provided on the side plate 80 in a retracted state, and FIG. 13B shows a recessed state insert 250 projected. The configuration operation will be described below with reference to the drawings.

First, the structure of the retracting mechanism 200 of the side plate 80 of the mold K2 will be described with reference to FIG.
In both side plates 80, 80, the recessed part insert 251 is fixed to the upper side in the center in the longitudinal direction, and a hole 85 is formed in the lower part of the center so that the recessed part insert 250 can be retracted. Guide 25
5, the recessed part nest 250 connected to the retractable mechanism 200.
In the retractable mechanism 200, which is slidably provided, a left lever 220L and a right screw 2 are attached to a screw rod 220 having a rotating head 210.
20R is engraved, and the left screw 220L part is provided with shaft attachment parts 23 at both ends.
The nut member 22LN provided with is screwed to the right screw 220R.
Nut member 22R in which shaft mounting portions 23 are provided on both ends of the same
N is screwed, one end of the link 230 is shafted to the shaft mounting part 23, the other end is gathered, and the other end is shaft mounted to the rear part of the recessed part insert 250, and the screw fit 220 is supported by the bearing part 215. It is configured to be fixed to the outside of the side plate 80.

Next, referring to FIG. 13B, the retractable mechanism 200
If the turning head 210 is rotated to the right, the nut member 22LN and the right screw 2 screwed into the left screw 220L will be described.
The nut members 22RN screwed into the 20R approach each other, and the link 230 causes the recessed part insert 250 to project.
If the rotating head 210 is rotated counterclockwise during demolding, the left screw 220
The nut member 22LN screwed into L and the nut member 22RN screwed into the right screw 220R are separated from each other and the link 23
0 inserts the recessed part insert 250 into the side plate 8 as shown in FIG.
Immerse yourself in zero.

FIG. 14 is a diagram for explaining the operation of the core.
1A shows the core 100 before reduction of the form K2, and FIG.
4B is a diagram showing a state where the core 100 is contracted, and shows a state in which the core is contracted by the operation of the rotating head 310 of the expansion / contraction mechanism 300 and before the mold is removed. The core 10 is shown in FIG. 14 below.
The scaling operation of 0 will be described in detail.

The core 100 in the widened state shown in FIG.
Is the expansion / contraction mechanism 300 (or 30
0b) turning the turning head 310 counterclockwise, the left screw 320
The nut LN of the L portion and the nut RN of the right screw 320R portion start to separate from each other, the link 345 starts to pull the orthogonal joint 350 inward, and the tip connecting hole 14 of the L-shaped link 140
3 is pulled, the upper separating part 115 of the upper core 110 and the lower separating part 125 of the lower core 120 begin to separate, and at the initial point of core contraction, the lower core 120 is connected to the L-shape. With the upper end connecting hole 141 of the link 140 as the center of rotation, the L
While being drawn by the lower end connecting hole 142 of the mold link 140 to reduce the width inward, the mold core 140 begins to rise upward inward of the upper core 120. To the link attachment portion 125a of the upper core 120, and the upper core 120 is connected to the lower core 110.
The lower core 110 rises into the upper core 120 while further reducing the width, and becomes the contracted state of FIG. 9 (b) so that the mold can be immediately released from the mold. The chain double-dashed line 100A is the core outline before reduction. Next, the operation during widening will be described.

The core 100 in the contracted state shown in FIG.
When the rotating head 310 of the expansion / contraction mechanism 300 (or 300b) is rotated to the right at the time of widening, the nut LN of the left screw 320L part and the nut RN of the right screw 320R part start to approach each other, and the link 345 is orthogonal. The joint 350 starts to be pushed outward, the tip connecting hole 143 of the L-shaped link 140 is pushed, the upper core 110 begins to widen, and the lower core 120 uses the tip connecting hole 141 of the L-shaped link 140 as a fulcrum. It begins to widen while moving downward following the upper core 110, and when the widening progresses, the upper separating portion 115 and the lower separating portion 125 are abutted and sealed, and the widened state of FIG. 14A is restored. .

The core 100 is supported by the support frame 130.
Since the support beam 500 shown by the chain double-dashed line in the figure is supported with a gap g provided, if the underdrain block is slightly lifted and pulled forward at the time of demolding, the core naturally moves in a direction with less resistance. In addition, it is possible to easily remove the mold in a short time, and naturally move to an appropriate position when assembling the mold to shorten the time of the assembling process.

Therefore, at the time of releasing the mold K2 described above, first, the connection hole forming member 400 is pulled out, and the front and rear end plates 6 are removed.
Open 0, 70 to shrink the core 100,
If the turning head 210 of the retractable mechanism 200 of 0 is rotated counterclockwise,
The link 240 allows the recessed part inserter 251 to be retracted into the side plate so that both side plates can be opened. When the both side plates are opened, the underdrain block B2 can be immediately released from the mold.

FIG. 15 is a perspective view of a connecting hole forming member according to a third aspect of the present invention, and FIG. 16 is an explanatory view of the connecting hole forming member, showing a mounting state of the connecting hole forming member in a cross section. The hole forming member 400 is provided with a base portion 430 that matches the holding portion of the drawing device of the production line, and a hard metal (quenched) from the rear portion 420 having the same diameter as the insertion hole 74 of the rear gable plate 70 to the tip portion 410. Steel, etc.) to form a hard surface coated by hard chrome plating or thermal spraying of hard ceramic / titanium-based hard metal. In addition, an engaging groove 440 that engages with a sandwiching portion of the drawing device of the production line is provided on the base portion.
Can be provided.

The mounting on the formwork is handled by a mounting device on the production line, the connecting hole forming member 400 is inserted from the insertion hole 74 of the rear end plate 70, and the recessed part insert 250 (25
Through the insertion hole 254 of 1), the fitting hole 64 of the front end plate 60
If the four connecting hole forming members are simultaneously urged in the large diameter direction of the axis by handling the drawing device of the production line when demolding, synergistic effect with the release agent applied at the time of placing Thus, the surface of the connecting hole forming member 400 and the concrete are excellent in releasability, the concrete surface is momentarily peeled off, and the connecting hole forming member can be easily removed within 10 seconds. At the time of demolding, it is possible to demold by pulling out to the position indicated by the chain line at the bottom.

[0062]

According to the first aspect of the present invention, when the underdrain block is released from the mold (when it is taken out of the form), the connecting hole forming member is pulled out, the tightening mechanism is loosened, and the front end plate is opened to interlock. The rear end plate retreats, at the same time, the positioning of each member is released, both side plates can be opened and the core can be contracted.If both side plates are opened and the retracting mechanism is operated, the recessed nest inserts into the core. Then, if the expansion / contraction mechanism is rotated in a predetermined direction, the core cross section is reduced, and if the underdrain block is pulled forward, the core moves in the direction with less resistance, leaving the core in the formwork. Immediate demolding is possible, and if the core expansion / contraction mechanism is rotated in the reverse direction during placing (concrete placement), the separating part of the upper and lower cores will be attached and sealed properly. When the size is restored and the retracting mechanism is operated, the recessed part insert protrudes to the outside of the core, closing both side plates and closing the front end plate. The rear gable plate moves forward, tightens the tightening mechanism, and if the connecting hole forming member is inserted from the rear gable plate side through the recessed part insert into the front gable plate, it is possible to place immediately, such as expansion / contraction mechanism, retracting mechanism, tightening bolt, etc. All operations can be performed by simple turning operation, so you can operate with simple pneumatic / power tools,
Since there is no work to insert or remove the recessed core and core,
A forklift and a detachable parts storage space are not required, and labor saving is achieved. It takes about 40 minutes for 4 to 5 workers with the conventional technology formwork. It can be completed within 10 minutes by two workers, and work safety and time can be reduced and productivity can be dramatically improved in both stationary and moving line production lines.

According to the second aspect of the present invention, when the underdrain block is released from the mold, after the connecting hole forming member is pulled out from the frame, the projecting recess mechanism allows the protruding recessed part recess to be retracted from the inner surface of the side plate. If you loosen the tightening mechanism and open the front gable plate, the rear gable plate retracts in conjunction with the front gable plate, and at the same time, the positioning pins of both side plates and the core that were fitted in the fitting holes of the front and rear gable plates come out, Both sides can be opened and the core can be reduced. Rotating the expansion / contraction mechanism in the specified direction reduces the cross section of the core. Opening both sides and pulling the underdrain block forward, the core has less resistance. It is possible to immediately remove the mold while leaving the core inside the mold frame.In addition, if the expansion / contraction mechanism installed in the core is rotated in the reverse direction at the time of placing, the upper core begins to widen and rotation operation is performed. If the lower core further advances, the lower core will follow the widening of the upper core and widen Then, the separating parts of the upper core and the lower core are attached and sealed, the entire core is restored to the proper size before reduction, and the recessed part nest is inserted by operating the retractable mechanism provided on both side plates. Project inside the side plate.Next, if both side plates are closed and the front end plate is closed, the rear end plate advances, the tightening mechanism is tightened, and the connecting hole forming member is inserted from the rear end plate side and fitted. Like the formwork of claim 1, which can be placed, all the operations of the expansion / contraction mechanism, the retracting mechanism, the tightening bolts, etc. can be performed by a simple turning operation, so that it can be operated by a simple pneumatic pressure / power tool, and the recessed portion can be operated. Since there is no need to remove or insert a child or core, there is no need for a crane, forklift, or a place for attaching / detaching parts, and labor is saved. It takes about 40 minutes for 4 to 5 workers with the conventional technology formwork. Also, the process from demolding to reassembling the formwork can be completed by two workers within 10 minutes. Can, even in stationary or mobile line method any production line, safety and time savings of work productivity Hakare is remarkably improved.

When the connecting hole forming member according to claim 3 is applied, if the connecting hole forming member is urged in the large diameter direction of the axis by the drawing device of the production line at the time of demolding, the releasability is remarkable. Therefore, the concrete surface peels off momentarily, the connecting hole forming member can be easily pulled out within 10 seconds, and the work such as mounting and removing the vinyl pipe for the through hole for the PC steel bar is unnecessary. The production time of the underdrain block can be shortened and labor can be saved, and since the contact surface of the connection hole forming member has high hardness, it is less worn and damaged, and the durability is improved.

[Brief description of drawings]

1 is a perspective view of a formwork for manufacturing an underdrain block according to claim 1. FIG.

FIG. 2 is a perspective view of an underdrain block connected with a PC steel bar.

FIG. 3 is a front view of a formwork for producing an underdrain block according to claim 1.

FIG. 4 is an explanatory diagram of a front and rear end plate interlocking mechanism.

FIG. 5 is a perspective view of a retractable mechanism.

FIG. 6 is a front view of the first embodiment of the expansion / contraction mechanism.

FIG. 7 is a plan view of a first embodiment of the expansion / contraction mechanism.

FIG. 8 is a front view of a second embodiment of the expansion / contraction mechanism.

FIG. 9 is a plan view of a second embodiment of the expansion / contraction mechanism.

FIG. 10 is an operation explanatory diagram of a core.

FIG. 11 is a perspective view of a formwork for manufacturing an underdrain block according to claim 2;

FIG. 12 is a front view of a formwork for producing an underdrain block according to claim 2;

FIG. 13 is an explanatory view of a retracting mechanism of a side plate portion.

FIG. 14 is an operation explanatory diagram of a core.

FIG. 15 is a perspective view of a connection hole forming member according to claim 3;

FIG. 16 is an explanatory diagram of a connection hole forming member.

FIG. 17 is an explanatory diagram of a conventional underdrain block manufacturing formwork.

FIG. 18 is an explanatory view of a conventional underdrain block manufacturing formwork.

FIG. 19 is an explanatory view of a conventional underdrain block manufacturing formwork.

[Explanation of symbols]

50-Underframe, 60-Front Gable, 70-Rear Gable, 75-
Interlocking mechanism, 77-interlocking means, 80-side plate, 90-tightening mechanism, 100-core, 110-upper core, 120-lower core, 115-lower separating part, 125-upper separating part, 130
─ Support frame, 140 ─ L-shaped link, 200 ─ Withdrawal mechanism, 2
50-recessed part insert, 300-expansion and contraction mechanism, 400-connection hole forming member, 500-support beam.

Claims (3)

[Claims] 1. A formwork for producing an underdrain block, which comprises openable and closable front and back grate plates, both side plates and a core, and a front gable plate which is erected up and down on an underframe and pivoted so as to be movable back and forth. The interlocking means is provided between the rear gable plates, the support beams are horizontally projected from the rear gable plate side, and the core is separately provided into an upper core and a lower core which can be sealed, and the upper middle Expansion and contraction in which a child and a lower core are rotatably connected by an L-shaped link, a support frame is fixed to a ceiling portion of an upper core, the support beam is press-fitted, and a base portion is fixed to a lower surface of the support frame. A mechanism is provided, the output ends of the expansion / contraction mechanism are connected to the left and right L-shaped link tips, and the recessed portion nests are provided in the bored holes at the four corners of the core through a retractable mechanism so that they can be retracted.
A form for producing an underdrain block, characterized in that a round bar-shaped connecting hole forming member is provided so as to be freely inserted into and removed from the insertion holes of the rear gable plate, the recessed part insert, and the front gable plate. 2. In an underdrain block manufacturing form having openable and closable front and back grate plates, both side plates and a core, a front gable plate which is erected up and down on an underframe and rotatably pivoted back and forth. The interlocking means is provided between the rear gable plates, the support beams are horizontally projected from the rear gable plate side, and the core is separately provided into an upper core and a lower core which can be sealed, and the upper middle Expansion and contraction in which a child and a lower core are rotatably connected by an L-shaped link, a support frame is fixed to a ceiling portion of an upper core, the support beam is press-fitted, and a base portion is fixed to a lower surface of the support frame. A mechanism is provided, and the output ends of the expansion and contraction mechanism are connected to the left and right L-shaped link tips, and a recessed part nest is fixed to the upper center of both side plates that can be tilted up and down, inside the hole formed in the lower center. The recessed part inserter can be retracted through the retractable mechanism, and the round bar-shaped connecting hole forming member is provided in the insertion hole of the rear gable plate, the recessed part inserter, and the front gable plate so as to be removable. , Underdrain block manufacturing mold, characterized in that. 3. The underdrain block manufacturing according to claim 1 or 2, wherein the round bar-shaped connecting hole forming member is a hard plating or a hard material sprayed with a hard material and having different diameters at both ends. Core device for molds.