JPH06254832A - Core apparatus for frame for manufacturing culvert block - Google Patents

Abstract

PURPOSE:To provide a core apparatus for a frame for manufacturing a culvert block wherein several kinds of depths of water channels can be formed and shortening of manufacturing time and labor saving can be achieved and desorption is not necessary. CONSTITUTION:A core is divided into an upper core 50 and a lower core 100 and an upper side connecting part 53 is provided on one side of the upper core and a lower connecting member 60 being weldable when it is brought into contact with the upper connecting part is provided and the upper connecting part and the lower connecting member are connected together by means of a bell-crank 70 and an output end of a core expanding and contracting mechanism 200 consisting of a link mechanism converting a rotating movement to a reciprocating movement to left and right is connected with a connecting hole 70a at the apex of the bell-crank and a core height changable mechanism 300 consisting of a link mechanism converting a rotating movement to an up and down movement is provided therein. In addition, a pinching mechanism 150 consisting of a slide nut provided with an inclined face converting the rotating movement to the reciprocating movement to left and right and a pinching member is provided in an inserting channel 120 on the upper part of both ends of the lower core and the upper core is inserted into the inserting channel and the output end of the core height changable mechanism 300 is connected with the lower core with a connecting chain 380c.

Description

Detailed Description of the Invention

[0001]

[Industrial application] One core unit can accommodate several types of underdrain block depths, and can easily adjust water channel depth (variable core height) and demold in a short time, and shorten manufacturing time. The present invention relates to a core device for a mold for manufacturing an underdrain block useful for labor-saving production.

[0002]

2. Description of the Related Art An underdrain block installed on the shoulder of a road or the like satisfies design conditions such as flow velocity and flow rate, and therefore an underdrain block with the same channel width and increased channel depth may be manufactured. In each case, it is necessary to replace molds with different water channel depths, and in the automated production line (moving intermittently about every 3 minutes), the manufacturing mold replacement process (which takes 10 to 20 minutes) is the entire line. Has led to a decrease in efficiency.
The applicant investigated the conventional technique in the core device of the formwork for manufacturing the underdrain block, but it is possible to manufacture the underdrain block of several kinds of channel depths with the one core device, and the demolding can be performed in a short time. I couldn't find a core device that could be easily done.

[0003]

The underdrain block with several kinds of water channel depth can be manufactured by one core device, and since the core is not required to be attached / detached, demolding / assembling can be performed easily in a short time. To provide a core device for a formwork for manufacturing an underdrain block that can be shortened and save labor.

[0004]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, in a core device for a form for producing an underdrain block, an upper core having a flexible portion in part has a substantially inverted U cross section.
The upper core is formed in a V-shape, and one side vertical portion of the upper core is separately provided into an upper joint portion and a lower joint member that can be sealed at the time of contact, and a portion near the inside of the upper joint portion and the lower joint member. Between the upper inner side of the upper part of the bell crank through the upper hole and the intermediate hole of the bell crank,
Rigidity is strengthened from the upper surface of the upper core to the opposite side, a support base of the expansion / contraction mechanism is provided on the inner surface of the rigidity-enhancing side, and a lower core having a flexible portion in the vicinity of the bottom surface is formed in a substantially U-shaped cross section. An insertion groove is provided in the upper part of the lower core, in which a holding mechanism for converting rotational movement into lateral movement is provided, and the tip of the upper core and the tip of the lower joining member are slidable in the insertion groove. A core expansion / contraction mechanism composed of a link mechanism that inserts and converts the rotational movement of the screw rod into lateral movement is rotatably provided horizontally on the support base, and the output end of the core expansion / contraction mechanism is connected to the tip of the bell crank. A core height varying mechanism, which is pivotally attached to the hole and configured to convert the rotational movement of the screw rod into vertical movement, is hung vertically on the support base, and the output end of the core height varying mechanism and the lower core. Cores of the formwork for manufacturing an underdrain block, characterized in that the spaces are connected to each other via a movable connecting member. Constitute a location.

According to a second aspect of the present invention, the holding mechanism provided in the insertion groove is provided with a turning head, and the left and right screw rods are threaded with the left and right screws.
Slide nuts having sliding surfaces on one side and upper and lower surfaces and slopes on the opposite side are respectively screwed into the right-hand screw portion so as to be symmetrical with respect to the slope direction, and the screw rods are opposed to the inner skin side of the insertion groove. A sandwiching member, which is rotatably supported on the opposing wall and has a slant surface that slidably contacts the slant surface of the slide nut inside, is slidably contacted with the upper and lower surfaces of the slide nut, and is sandwiched. The core device for a form for producing an underdrain block according to claim 1, wherein the inserted upper core is provided so as to be able to be sandwiched between the rear surface of the member and the inner surface of the outer skin of the core.

According to a third aspect of the present invention, in the core expanding / contracting mechanism, nut members are respectively screwed into screw rods provided with a rotating head and a plurality of sets of left and right screws are engraved, and the screw rods are freely rotatable on the side surface of the support portion. And one end of the link is rotatably pivotally attached to the upper and lower surfaces of the nut member, the other ends of the links are assembled and pivotally attached to the vertical axis of the cross joint, and the connection is orthogonal to the vertical axis of the cross joint. And a core height variable mechanism is provided with a turning head, and a nut member is screwed into a screw rod having a plurality of sets of left and right screws engraved, and the screw rod is rotatably attached to the lower surface of the support base. One end of the link is rotatably pivoted to the left and right side surfaces of the nut member, and the other ends of the links are gathered and pivotally attached to the left and right shafts of a cross joint having a lower core connecting portion at the lower end. The core device of the form for producing an underdrain block according to claim 1 or 2 is configured.

According to a fourth aspect of the present invention, there is provided a support beam extending from a rear end plate of the formwork for producing the underdrain block or a rear part of the underframe.
The core frame is internally provided with a support frame provided with required clearances in the upper, rear, left and right directions with respect to the support beam, and the core frame is supported by loosely inserting the support frame into the support beam. The core positioning means and the core height positioning means that fit into the positioning holes provided in the front and rear gable plates of the underdrain block manufacturing frame are provided at arbitrary positions of the upper core and the lower core of A core device for a form for producing an underdrain block according to any one of claims 1 to 3 is constructed.

[0008]

The height of the core (depth of the water channel)
When adjusting (in the state where the core is enlarged), first rotate the rotating head of the holding mechanism in the insertion groove provided in the upper left and right portions of the lower core in the reverse direction to rotate the upper core in the insertion groove. The pinching of the core is released and loosened, and when the rotating head of the core height varying mechanism is rotated, the lower core connecting portion, which is the output end of the core height varying mechanism, is converted into a vertical movement, The lower core moves up and down and the height of the core changes via a floating connecting member connected to the lower core connecting portion. The adjusted core height is fixed by the tip part being sandwiched by the sandwiching mechanism in the insertion groove.Therefore, by adjusting the core height variable mechanism, the underdrain block with several channel depths can be formed with one core device. Manufacture is possible, and the number of times the manufacturing form is replaced in the production line can be reduced.

At the time of releasing the mold (when taking out the product from the mold), if the rotating head of the expansion / contraction mechanism is rotated in the reverse direction, the lower joining member moves upward inside the upper joining portion of the upper core, The upper joint part also follows and is displaced inward, and the core width and core height are reduced so that the core is rolled inward, so the product can be easily demolded, and the concrete fine powder that has fallen off during demolding・ Invasion of dust inside the core can be reduced.

At the time of pouring (when assembling the formwork and driving in concrete), if the rotating head of the expansion / contraction mechanism is rotated, the lower joining member moves to the outside of the upper core and the upper joining portion is also added. It moves and is displaced to the outside, and the core width and the height direction of the core return to the normal size. Since each mechanism operates by a simple rotation operation, the introduction of an automatic machine becomes easy.

The pinching mechanism according to claim 2 is internally provided in the insertion groove of the lower core, and the inserted upper core can be fixed at an arbitrary position.・ A slide nut with a slanted surface on the right-hand screw part has a U-shaped clamping member with a slanted surface slidably contacting the slide nut inside, and is urged toward the outer core of the core to clamp the inserted upper core. If the core height is fixed and the rotating head is rotated in the reverse direction, the upper core is released.

In the core expanding and contracting mechanism according to claim 3, when the rotating head is rotated clockwise, the nut members screwed into the left and right screw portions of the screw rod come close to each other, and are pivotally attached to the upper and lower surfaces of the nut member. The other end of the link is assembled via the above-mentioned link to urge the cross joint pivotally attached to the right, and the bell crank connected to the cross joint is pushed to widen the contracted core to a regular size. When the turning head is rotated counterclockwise, the nut members screwed into the left and right screw portions of the threaded rod on which the left and right screws are threaded are separated from each other, and the nut members are pivotally attached to the upper and lower surfaces of the nut member. The other end of the link is assembled to urge the cross-joint pivotally attached to the left, and the bell crank connected to the cross-joint is pulled to reduce the widened core to a size suitable for demolding.

In the core height varying mechanism according to the third aspect of the present invention, when the turning head is rotated clockwise, the nut members screwed into the left and right screw portions of the screw rod come close to each other, and the upper and lower surfaces of the nut member. The other end of the link is gathered via a link pivotally attached to the lower joint to urge the pivoted cross joint downward, and the lower core connected to the cross joint via a connecting chain descends by its own weight. If the head for rotation is rotated counterclockwise, the nut members screwed into the left and right screw portions of the screw rod are separated from each other, and the link is pivotally attached to the left and right surfaces of the nut member. The other end is assembled and the cross-joint pivotally attached is biased upward, and the lower core connected to the cross-joint via a connecting chain is pulled up to lower the core height.

According to the fourth aspect of the present invention, the core device is supported by the support beams extending from the rear gable plate or the rear part of the underframe with required clearances (upward / rearward / leftward / rightward gaps) supported. When (the core is in a contracted state), if you raise it a few millimeters by a vacuum pad (due to vacuum suction) and pull it out forward, the core device with a clearance provided on the support beam will be in a position with low friction resistance. Move to nature,
It is possible to remove the product while leaving the core device on the mold, and it is possible to reduce or prevent damage such as wear and deformation of the core outer shell.At this time, the core position after the shrinking and demolding process is up.・ Even if it moves slightly in the front / rear and left / right directions, the positioning means provided on the upper and lower cores can be guided to the positioning holes of the front and rear contact plates by closing the mold (assembling the form) and tightening. Are fitted together, and the core device is securely assembled in the normal position,
In addition, even when the core height variable mechanism is operated to change the core height, the required dimensions can be reliably maintained, improving product quality (dimensional accuracy) and removing and attaching the core device. The time for each process can be shortened and the production line can be labor-saving.

[0015]

1 to 8 show an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic construction of the embodiment of the present invention and a state of insertion into a mold, and FIG. FIG. 3 is an exploded perspective view of the embodiment, FIG. 3 is a front view of the embodiment of the present invention, FIG. 4 is a partially cutaway perspective view showing the structure of the holding mechanism according to claim 2, and FIG. 6 is an operation explanatory diagram when changing the core depth in the embodiment of the present invention, FIG. 7 is an operation explanatory diagram when the core is reduced in the embodiment of the present invention, and FIG. 8 is an embodiment according to claim 4. And FIG. 9 is an explanatory view of the underdrain block by the formwork to which the present invention is applied.

The configuration and operation of each embodiment will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a schematic structure of the embodiment of the present invention and a state of being mounted on a mold. A mold for an underdrain block indicated by a thin line (hereinafter referred to as a mold K) is a underdrain. The block is manufactured upside down, and the bottom of the formwork is the product top end. This figure shows the state after the mold removal of the present invention mounted on the formwork K (the core is reduced). In the figure, the front and rear gable plates 02, 02 'and both side plates 03 (the side plate on the right side when viewed from the front gable plate 02 side) of the form K are opened in the direction of the chain line arrow, and the core device N is contracted. Is supported by a support beam 04 projecting from the rear gable plate 02 'side with a clearance (gap) in the upward, front-rear, and left-right directions, and the underdrain block cast from the arrow A direction is a core. The device N is demolded (removed) in the direction of arrow B while leaving the device N on the mold K. Reference numeral 001 in the figure denotes a movable bottom plate of the mold K that can be moved up and down and tilted.

The core device N can be inserted into the lower core 100 having an insertion groove 120 in which the upper core 50 is slidably contacted and which has the holding mechanism 150 therein, and the lower core 100. A lower joint member having an upper core 50, an upper joint 53 provided on one side of a vertical portion, and a tip 63 capable of sealing the upper joint 53 when abutting. An upper core 50 including a lower joint member 60 inserted into and sandwiched by a lower core 100, in which a core height variable mechanism 300 and a core expansion / contraction mechanism 200, which are described in detail later, are provided. Is integrated with the lower core 100, and the upper end of the lower joint member 60 is displaced to the upper inside of the upper joint 53 of the upper core 50 when the core is contracted as shown in FIG. The lower core 100 side that is being moved is also displaced at the same time, so that the core width and core can be rolled inward. It has shrunk configured to be able to of. In the figure, the core device N is a rear gable plate 02 'on which the form K is pivoted.
From the core support beam 04 extended (projected) from above,
It is supported with a required clearance (described later) in the left-right direction, and the core support beam is supported by a core support beam 04 '(shown by a lead line in the figure) extending from the underframe 01 of the formwork. You can also do it.

FIG. 2 is an exploded perspective view of the embodiment of the present invention, in which a joining state of the upper joining portion 53 and the lower joining member 60 is shown in a partial detail view on the upper right of the upper core 50, and the core outer skin is shown. A core expansion / contraction mechanism 200 and a core height varying mechanism 300, which are partially cut out, are shown, and the core expansion / contraction mechanism 200 and the core height varying mechanism 300 are shown in an enlarged manner at the bottom of the figure. Is
FIG. 4 is a front view of an embodiment of the present invention, showing a core device N having a reduced core height and enlarged to a regular size. An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. .

The upper core 50 has a substantially U-shaped cross section, the right vertical portion 51 is shorter than the left vertical portion 52, and the reinforcing rib L1 is provided to avoid the flexible portion be on one side of the upper portion. At the lower end of the portion 51, the lower joining member 6 is provided when the core is contracted.
An upper joint portion 53 that separates from 0 is provided, and the upper joint portion 53
The upper connection fitting 53c is fixed near the inner side, and the upper joint 5
3, a rigid lower joining member 60 having a tip portion 63 capable of sealing (watertight) at the time of abutting is provided so that the left and right lower end portions of the core are aligned at the time of abutting, and inside the upper portion of the lower joining member 60 as well. Similarly, a lower connecting fitting 63b is provided, an upper hole 70c of the bell crank 70 is connected to the upper connecting fitting 53c, an intermediate hole 70b of the bell crank 70 is connected to the lower connecting fitting 63b, and a tip connecting hole 70a of the bell crank 70 is connected. The core expansion / contraction mechanism 200
Is rotatably connected to the output end of the core and a reinforcing rib L2 is provided from the flat upper surface of the core to the left vertical portion 51 to enhance the rigidity, and the reinforcing section with the enhanced rigidity is provided with a core expansion / contraction mechanism 200 described later. A bearing stand 20 for rotatably supporting the variable core height mechanism 300.
And a support frame 54 for inserting the support beam 04 inside the flat portion of the upper surface. Between the support frame 54 and the support beam 04, a predetermined clearance C that allows the core device N to move in the upward and leftward and rightward directions. (Gap) is provided.

Next, the core expansion / contraction mechanism 2 provided inside the upper core.
00 and the core height variable mechanism 300. The core expansion / contraction mechanism 200 and the core height variable mechanism 300 convert the rotational movement of the screw rod into left and right push-pull movements and vertical movements. The core expansion / contraction mechanism 200 is composed of a similar link mechanism, and has a core expansion / contraction mechanism 200 laterally provided on the side surface of the mounting base 20 and a core height variable mechanism 300 vertically provided on the lower surface thereof. 210, the left and right screw portions 220L and 220L of the screw rod 220 in which a plurality of sets of left and right screws 220L and 220R are threaded.
The nut members 230L and 230R are respectively screwed into the R and rotatably supported on the support table 20.
One end of the link 250 is rotatably pivotally attached to the upper and lower shafts of each of the 230R, and the other ends of the links 250 are collected and pivotally attached to the vertical shaft 265 of the cross joint 260.
5, the core height varying mechanism 300 is constructed by connecting a connecting hole 270 provided orthogonally to the connecting hole 270 to the connecting hole 70a at one end of the bell crank 70. Screw rod 3 in which a plurality of sets of screws 320L and 320R are threaded
Nut members 330L and 330R are screwed into the left and right screw portions of 20 to rotatably support the lower portion of the support table 20,
One end of a link 350 is rotatably pivotally attached to the left and right side shafts of the nut members 330L and 330R, and the other ends of the links 350 are gathered to be pivotally attached to the left and right shafts 365 of the cross joint 360. The core height varying mechanism 300 provided with the connecting hole portions 370 orthogonal to each other is configured.

Next, the lower core 10 for explaining the lower core will be described.
0 is formed in a substantially U-shaped cross section having a plurality of flexible portions be, and reinforcing ribs L3, L4, etc. are provided except for the flexible portions be.
An insertion groove 120 composed of a facing wall 102 parallel to the reinforced core shell 101 is provided on the upper part of the right and left vertical portions.
The lower end of the left vertical portion 52 of the upper core 100 and the lower end of the lower joint member 60 are inserted into the upper core 100, and the upper core 50 is provided so as to be able to be clamped by a clamping mechanism 150, which will be described later in detail. A long hole or the like is provided between the connecting portion 110 inside the bottom surface of 100 and the connecting hole portion 370 of the core height varying mechanism 300 in consideration of the displacement of the lower core when the core is contracted, or at least one of the connecting chains 380c. And a connecting link 380l (shown in the figure).

With the above construction, when the rotating head 210 of the core expansion / contraction mechanism 200 is rotated to the right, the nut members 230L and 230R approach each other as indicated by arrows, and the cross joint 260 as the output end. Moves to the right. If the core height variable mechanism 300 also rotates the rotating head 310 to the right, the nut members 330L and 330R approach each other as shown by arrows, and the cross joint 360, which is the output end, moves downward. If the respective heads for rotation are reversely rotated, the operation reverse to the above is performed.

FIG. 4 is a partially cutaway perspective view of the pinching mechanism according to claim 2. The pinching mechanism 150 provided in the insertion groove 120 in the upper part of the lower core 100 is provided with a turning head 151 and is provided on the left side. The left and right screws 152L and 152R of the threaded rod 152 in which the right screws 152L and 152R are threaded are provided with sliding surfaces on the abutting surface and the upper and lower surfaces of the opposing wall 102 of the insertion groove 120, and the inclined surface SL is provided on the other surface. The slide nuts 123L (lower slope on the front side) and 123R are respectively screwed in with the slope directions being symmetrical.
The screw rod 152 is rotatably supported by a plurality of bearing portions 154 provided inside the facing wall 102, and the slide nut 123 is
A sandwiching member 160 having a U-shaped cross section, which is provided inside with a slant surface SL ′ that slidably contacts the slant surface SL portion of L and 123R, is slidably contacted with the vertical sliding surface of the slide nut so as to be slidable only in the left and right directions. The holding surface 166 of the holding member 160 and the core outer skin 1
The lower end portion 52 of the inserted upper core and the lower end portion of the lower joining member 60 (not shown) can be sandwiched between the inner surfaces of 01.

FIG. 5 is a diagram for explaining the operation of the holding mechanism.
FIG. 9A shows the case of releasing the clamp. When the rotating head 151 of the clamp mechanism 150 is rotated counterclockwise, the left / right screw 152L,
Slide nuts 123L and 123R screwed into 152R
Move away from each other in the direction of the arrow and slide nut 1
The inner slant surface SL ′ of the sandwiching member 160, which is slidably contacting the slant surface SL of 23L and 123R, is released, and the upper core is loosened so that the core height can be changed. The operation when pinching and fixing the core is shown.
If 51 is rotated clockwise, the slide nuts 123L, 1
The sandwiching member 160 having a slanted surface SL ′ slidably in contact with the slanted surface SL of 23R is pressed in the direction of the core outer skin 101 in the direction of the arrow po, and the space between the sandwiching surface 166 of the sandwiching member 160 and the inner skin 101 inner surface is increased. It operates to clamp and fix the upper core inserted in.

FIG. 6 is a diagram for explaining the operation when the height of the core is changed. The core expansion / contraction mechanism 200 is operated to expand the core device to the normal state, and the holding mechanism 150 is loosened to adjust the core height changing mechanism 30.
It shows the case where the lower core 100 is lowered by operating 0 and the core height is changed (increased). When changing the core height,
First, when the rotating heads 151 of the left and right holding mechanisms 150, 150 provided in the insertion groove 120 of the lower core 100 are rotated counterclockwise, the holding of the upper core 50 is released, and then the core height is increased. When the turning head 310 of the variable mechanism 300 is rotated to the right, the sly nuts 330L and 330R screwed into the left and right screw portions 320L and 320R move closer to each other, and the link 350 moves the cross joint 360 downward. The lower core 60 moved and connected through the connecting member 380c (or 380l) is lowered by its own weight to increase the core height. Here, if the rotating head 151 of the holding mechanism 150 is rotated to the right, The lower end portion of the lower joining member 60 and the lower end portion 52 of the upper core, which are inserted, have a holding surface 166 of the holding member 160 and the core shell 10.
The core height is fixed by being sandwiched between the inner surfaces.

When lowering the core height, the clamping mechanism 15 is used.
Rotate 0 to the left to release the pinch, and adjust the core height 300
If the head 310 for rotation of is rotated counterclockwise, the left and right screw parts 32
Both sly nuts 330L and 3 screwed into 0L and 320R
30R separates from each other, the cross joint 360 connected to the link 350 rises, the lower core 100 connected to the connecting member 380c also rises, and the height of the core decreases. Here, the pinching mechanism 150 is operated. For example, the upper core is sandwiched between the sandwiching member and the core outer skin, and the core height is fixed as described above.

FIG. 7 is an operation explanatory view of the above-described embodiment at the time of demolding (the core is reduced and the product is taken out of the mold). If the rotating head 210 of the expansion / contraction mechanism 200 is rotated counterclockwise, it is left.・ Both sly nuts 2 screwed into the right screw parts 220L and 220R
30L and 230R move away from each other, and each linked link 250 moves the cross joint 260 in the axial direction of the screw rod 220, and the connecting hole at the tip of the bell crank 70 connected to the connecting hole portion 270 of the cross joint point 260. Part 7
0a is pulled, and the bell crank begins to rotate with the upper hole 70c of the bell crank 70 axially attached to the upper coupling fitting 53c as the center of rotation.
Lower connecting fitting 63b of the lower joining member 60 connected to 0b
Starts to move inside the upper core, and when the rotation of the screw rod 220 progresses, the lower joining member 60 moves upward inside the upper core, and the lower core 100 holding the lower joining member 60 also The plurality of flexible portions be are displaced and the height of the core is reduced, the upper joint portion 53 is also chased and displaced inward, and the core before reduction indicated by the chain double-dashed line is the core width / core. The height is reduced and mold release becomes easy. In addition, the connection hole portion 36 of the core height changing mechanism 300.
0a and the lower core are movably connected (by a connecting member 380c by a chain or a connecting member 380l having a long hole or the like at least on one side), so that the lower core bends upward when the core is contracted. However, the chain will operate satisfactorily due to looseness or play such as long holes.

Further, at the time of driving (when assembling the formwork and driving concrete), the rotating head 210 of the expansion / contraction mechanism 200.
When the right crank is rotated, the sly nuts screwed into the left and right threaded portions come close to each other, the link pushes the cross joint 260, the bell crank 70 connected to the cross joint is pushed, and the bell crank 70 With the connecting portion of the upper hole 70c as the center of rotation, first, the intermediate hole 70b of the bell crank.
The lower joint member that is connected to the lower joint member and the lower core that is sandwiched between the lower joint member and the lower joint member also start to return to the outside while being displaced, and as the rotation of the screw 220 progresses, the upper joint portion 53 also follows the lower joint member 60 to the outside. At the final stage, the upper joining portion 53 and the leading end portion 63, which is the joining surface of the lower joining member 60, are brought into close contact with each other in a sealable manner at the final stage, and the core width / core height of the entire core is as shown in FIG. It operates to return to the proper size shown in. The positioning means p provided on the upper core 50 and the lower core 100 in the figure will be described next.

FIG. 8 is an explanatory view of a core device according to claim 4, showing the core device supported by a support beam protruding from the rear end plate of the mold in a perspective view, and a lead line at the bottom of the drawing. The support beam 04 'extended from the rear part of the underframe of a formwork and the explanatory view of clearance C are shown.

In the illustrated form K, a support beam 04 is projected from the rear end plate 02 ', and the space between the support frame 54 and the support beam 04 provided in the core device N is upward / leftward and rightward when demolding. A clearance C that provides a margin of forward and backward movement is provided to support the core device N, and a limiting piece 55 that limits the movable range of the core device at the time of demolding is provided on the tip surface of the support beam 04.

According to the above construction, when the product is slightly lifted by the vacuum pad of the demolding machine at the time of demolding, the core skin and the concrete surface of the hollow part of the product are separated when the product is lifted by several millimeters. When the demolding machine is pulled out to the front, the core device N is supported by the support beam 04 because there is play in the upward / backward / leftward / rightward directions.
While being carried by, move in the direction with less frictional resistance,
Easy product removal.

A support beam 04 'shown in the lower part of the drawing is extended from the rear portion of the underframe 01 of the form K, and the rear gable plate 02' is provided.
The support beam 04 'which has passed through the base plate and is provided in a horizontal direction is provided with a required clearance as described above so that the core device can be loosely inserted and supported, and the support beam is extended from a structurally strong underframe. This is particularly useful in the case of a core device for large products (for example, a plurality of support beams may be used).

Next, the positioning means of the core device will be explained. A sharp positioning pin p having a diameter for covering the clearance is provided at an appropriate position on the upper core 50 and the lower core 100 of the core device N, Positioning holes p2 that can be fitted by being fitted with the positioning pins p on the core device side when closed are provided in the front and rear end plates 02, 02 'of the mold.

According to the above construction, if the product is vacuum-adsorbed by the vacuum pad of the demolding machine at the time of demolding, when the product rises slightly (several millimeters), the core of the core and the concrete in the hollow part of the underdrain block are removed. If the surface is peeled off and then the demoulding machine is pulled out forward, there is play in the upward, forward, backward, leftward and rightward directions, and while the core device is carried on the support beam, it moves in the direction with less friction resistance, The product can be easily removed, and damage such as wear and deformation of the core outer skin can be reduced or prevented,
Changes in the core position after demolding are also corrected each time the mold is closed, and the proper dimensions can be maintained when the core height is changed.

FIG. 9 is an explanatory view of an underdrain block according to the present invention. As shown in FIG. 9 (a), a single core device can be used to make products B1 and B2 having different water channel depths. If the present invention is applied to a mold in which the bottom part of the mold is capable of ascending and descending, the road slope rs and the running water slope w shown in FIG.
Underdrain blocks BS1 and BS that can be used when s is different
2 can be manufactured at low cost. In this case, if the product top end (upper surface) T is provided with a gradient, the upper surface thickness of BS2 becomes thicker than BS1 if the core depth remains the same. According to the core height variable mechanism of the invention, it is possible to manufacture the water channel depth h1 (shallow) to the water channel depth h2 (deep) without changing the formwork of the production line so as to be deeper by several sizes. The weight of the product can be reduced and the cost of the product and construction can be reduced. The thin line HL in the figure (b) is a horizontal line.

[0037]

When the core device according to the first aspect is applied to the formwork for producing the underdrain block, the core height variable mechanism is adjusted (for about 2 minutes), and the depth of the channel of several sizes can be achieved by one core device. It is possible to manufacture the underdrain block, and it is possible to inexpensively make the underdrain block that can be used when the road gradient and the running water gradient are different. In addition, it is possible to reduce the cost of the formwork for manufacturing in the production line, which conventionally took about 20 minutes. There is an effect that the replacement work can be reduced and the production is dramatically improved. The core can be easily expanded and contracted by operating the core expansion and contraction mechanism, and the entire core can be removed when demolding (when removing the product from the mold). As the core width and core height are reduced as it is rolled inward, the product can be easily demolded, and the intrusion of concrete fine powder, dust, etc., that has fallen off during demolding, into the core can be reduced, and durability is improved. Has the effect of increasing.

Further, at the time of pouring (when assembling the formwork and driving concrete), if the core expansion / contraction mechanism is operated in reverse, the lower joining member moves to the outside of the upper core and the upper joining part is also added. The core moves and is displaced outward, and the dimensions of the core in the width direction and the height of the core are restored to the normal dimensions. The core is expanded and contracted by a simple rotation operation, which shortens the manufacturing time and saves labor.

According to the core device of the second aspect, the divided upper core and lower core can be integrated in a short time only by rotating the holding mechanism.

According to the core device of the third aspect, the core can be reduced by rotating the rotary head of the core expansion / contraction mechanism to the right.
If the turning head is rotated counterclockwise, the core can be surely widened, and if the turning head of the variable core height mechanism is rotated clockwise, the core height is increased, and by left rotation, the core height is increased. Since both mechanisms are lowered, they can be operated only by the turning operation, so that the work can be reliably performed in a short time. Further, since both mechanisms have substantially the same component structure, they can be manufactured at low cost.

According to the core device of the fourth aspect, since the core device is supported by the support beam extending from the rear gable plate or the underframe with a required clearance, the product is vacuum pad (vacuum suction). Due to the play in the upper, front, back, left, and right directions when the mold is lifted up a few millimeters and pulled out to the front, the core device is naturally supported on the support beam and is naturally placed in a position with low friction resistance. By moving the product, it becomes easy to remove the product, damage to the core outer shell such as wear and deformation can be prevented, and even if the core position after the demolding process moves slightly upward, forward, backward, leftward or rightward, By closing (fitting the mold) and tightening, the positioning means provided on the upper and lower cores are guided by the positioning holes of the front and rear girder plates that are in contact, and fit together to ensure that the core is in the proper position. Assemble and operate the core height variable mechanism to adjust the core height. Even if it is changed, the required dimensions can be reliably maintained, the product quality (dimensional accuracy) is improved, and it is not necessary to attach and detach the core device, which saves labor and unmanned the production line. Forming can be done in about 3 minutes, which has the effect of dramatically improving production.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of the present invention and a mounting state on a mold.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

FIG. 3 is a front view of the embodiment of the present invention.

FIG. 4 is an explanatory view showing a configuration of a sandwiching mechanism according to claim 2.

FIG. 5 is an operation explanatory view of a holding mechanism.

FIG. 6 is an operation explanatory diagram when changing the core depth according to the embodiment of the present invention.

FIG. 7 is an operation explanatory view when the core is reduced according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of an underdrain block according to a formwork to which the present invention is applied.

[Explanation of symbols]

 A-demolding direction be-flexible portion C-clearance K-form frame N-core device 01-form frame underframe 02,02'-front / rear gable plate 04-support beam 50-upper core 53-upper side Joining part 60-lower joining member 70-bell crank 100-lower core 120-insertion groove 150-clamping mechanism 152-screw 200-core expanding / reducing mechanism 220-screw 300-core height varying mechanism 320-screw 380c- Connecting chain

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[Procedure amendment]

[Submission date] January 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of the present invention and a mounting state on a mold.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

FIG. 3 is a front view of the embodiment of the present invention.

FIG. 4 is an explanatory view showing a configuration of a sandwiching mechanism according to claim 2.

FIG. 5 is an operation explanatory view of a holding mechanism.

FIG. 6 is an operation explanatory diagram when changing the core depth according to the embodiment of the present invention.

FIG. 7 is an operation explanatory view when the core is reduced according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a core device according to claim 4;

FIG. 9 is an explanatory diagram of an underdrain block according to the present invention.

[Explanation of Codes] A ... Demolding direction be ... Flexible portion C ... Clearance K ... Formwork N ... Core device 01 ... Formwork underframe 02, 02 '... Front / rear grate plate 04 ... Support raft 50 ... Upper part Core 53 ... Upper joining part 60 ... Lower joining member 70 ... Bell crank 100 ... Lower core 120 ... Insertion groove 150 ... Clamping mechanism 152 ... Screw rod 200 ... Core expansion / contraction mechanism 220 ... Screw rod 300 ... Core height varying mechanism 320 ... screw rod 380c ... connecting chain

Claims (4)

[Claims] 1. A core device for a formwork for producing an underdrain block, wherein an upper core having a flexible part in part is formed into a substantially inverted U shape in cross section, and one side vertical part of the upper core is abutted. An upper joint portion and a lower joint member that can be sealed at different times are provided separately, and an upper hole and an intermediate hole of a bell crank are provided between the inner vicinity of the upper joint portion and the upper inner vicinity of the lower joint member. The upper core is strengthened in rigidity from the upper surface to the opposite side, a support base for the expansion / contraction mechanism is provided on the inner surface of the rigidity-enhancing side, and the lower core having a flexible portion near the bottom surface has a substantially U-shaped cross section. An insert groove is provided in the upper part of the lower core, the insert groove having a pinching mechanism for converting a rotational motion into a horizontal motion is provided, and the upper core tip portion and the lower joining member tip portion are provided in the insertion groove. A core expansion / contraction mechanism consisting of a link mechanism that is slidably inserted and that converts the rotational movement of the screw rod into lateral movement can be rotated. A core height varying mechanism including a link mechanism that is installed laterally on the support base, and has an output end of the core expansion / contraction mechanism pivotally attached to a tip connecting hole of the bell crank and converts a rotational movement of a screw rod into an up / down movement. In the underdrain block manufacturing formwork characterized in that the bottom end is suspended from the support base, and the output end of the core height varying mechanism and the lower core are connected via a floating connecting member. Child device. 2. A sandwiching mechanism internally provided in the insertion groove, wherein a left and right screw portion of a screw rod provided with a turning head and in which left and right screws are threaded,
Slide nuts with sliding surfaces on one side and the upper and lower surfaces and slopes on the opposite side are respectively screwed in symmetrically with respect to the slope direction, and the screw rod is rotated to the opposite wall facing the inner skin side of the insertion groove. A sandwiching member having a U-shaped cross-section, which is provided so as to be freely supported and provided with an inclined surface slidably contacting the inclined surface of the slide nut, is slidably contacted with the upper and lower surfaces of the slide nut and externally fitted, and the rear surface of the sandwiching member and the core The core device for a formwork for producing an underdrain block according to claim 1, wherein the inserted upper core is provided so as to be able to be sandwiched between the inner surfaces of the outer skin. 3. The core expansion / contraction mechanism is provided with a turning head on the left side.
A nut member is screwed into the left and right screw portions of a screw rod in which a plurality of sets of right screws are engraved, the screw rod is rotatably supported on the side surface of the support portion, and one end of the link is rotated to the upper and lower surfaces of the nut member. Freely pivotally, the other ends of the links are assembled and pivotally attached to the vertical axis of the cross joint, and a connecting portion orthogonal to the vertical axis of the cross joint is provided. The left and right threaded portions of the threaded rod, in which a plurality of sets of left and right threaded screws are provided, are respectively screwed with nut members, and the threaded rods are rotatably supported on the lower surface of the support base.
One end of the link is rotatably pivotally attached to the left and right side surfaces of the nut member, and the other ends of the links are gathered and pivotally attached to the left and right shafts of a cross joint having a lower core connecting portion at the lower end. The core device for a form for producing an underdrain block according to claim 1 or 2. 4. A support frame provided with a support beam extending from a rear gable plate or an underframe rear part of a form for producing an underdrain block, and a support frame having a required clearance in the upper, front, back, left and right directions with respect to the support beam. Inside the device, the support frame is loosely inserted into the support beam to support the core device, and the front and rear girders of the formwork for manufacturing the underdrain block are provided at arbitrary positions of the upper core and the lower core of the core device. The core positioning means and the core height positioning means that fit into the positioning holes provided in the plate are provided, and the core of the frame for manufacturing the underdrain block according to any one of claims 1 to 3, apparatus.