JP3002617B2 - Core device for formwork for culvert block production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application field] One core device can accommodate several types of culvert blocks with different channel depths. The channel depth adjustment (variable core height) and demolding can be performed easily in a short time, reducing the manufacturing time. The present invention relates to a core device for forming a culvert block useful for labor-saving production.

[0002]

2. Description of the Related Art In order to satisfy design conditions such as flow velocity and flow rate, culvert blocks installed on shoulders of roads or the like sometimes produce culvert blocks with the same channel width and increased channel depth. In each case, it is necessary to replace molds with different waterway depths. In an automated production line (moving intermittently about every 3 minutes), the process of replacing the production formwork (which takes 10 to 20 minutes) requires the entire line. This leads to a decrease in efficiency.
The applicant has investigated the prior art in the core device of the mold for manufacturing the culvert block, but it is possible to manufacture the culvert block of several kinds of channel depth with one core device, and the demolding can be performed in a short time. There was no easy-to-use core device.

[0003]

A culvert block having several kinds of channel depths can be manufactured with one core device, and since the core does not need to be attached or detached, the mold can be easily removed and assembled in a short time. To provide a core device of a mold for producing a culvert block which can be shortened and labor-saving.

[0004]

According to a first aspect of the present invention, there is provided a core device for forming a culvert block, wherein an upper core having a flexible portion is substantially inverted in cross section.
It is formed in the shape of a letter, and one side vertical portion of the upper core is provided separately in an upper joint portion and a lower joint member that can be sealed at the time of contact, and the vicinity of the inside of the upper joint portion and the lower joint member are provided. The upper inner neighborhood is connected via the upper hole and the intermediate hole of the bell crank, the rigidity is strengthened from the upper surface of the upper core to the opposite side, and a support base of the core expansion / contraction mechanism is provided on the inner surface of the rigidity enhancing side, A lower core having a flexible portion in the vicinity of the lower core is formed in a substantially U-shaped cross section, and an insertion groove internally provided with a holding mechanism for converting a rotational motion into a left-right motion is provided in an upper portion of the lower core. The core expansion / contraction mechanism, comprising a link mechanism that slidably inserts the tip of the upper core and the tip of the lower joining member into the groove and converts the turning motion of the screw rod into the left-right motion, is pivotally supported by the bearing. The output end of the core expansion and contraction mechanism is pivotally connected to the tip connection hole of the bell crank, A variable core height mechanism consisting of a link mechanism that converts the vertical movement into a vertical motion is vertically provided on the support base, and between the output end of the variable core height mechanism and the lower core, via a movable connecting member. The core device of the formwork for producing a culvert block is characterized by being connected.

According to a second aspect of the present invention, the holding mechanism provided in the insertion groove is provided with a rotating head and is provided with a left and right screw threaded left and right.
A slide nut provided with a sliding surface on one side and upper and lower surfaces and a slope on the opposite side is screwed into the right screw portion in a symmetrical manner with respect to the slope direction, and the screw rod faces the core outer side of the insertion groove. A clamping member having a U-shaped cross section, which is rotatably supported on the opposing wall and has a slope inwardly slidably in contact with the slope of the slide nut, is slidably in contact with the upper and lower surfaces of the slide nut and externally fitted. The core device of the mold for culvert block production according to claim 1, wherein the inserted upper core is provided so as to be sandwiched between the back surface and the inner surface of the lower core shell.

According to a third aspect of the present invention, the core expanding / contracting mechanism is provided with a rotating head, and a nut member is screwed into each of a plurality of sets of left and right screws, and the nuts are rotatable on the side surfaces of the support portion. And one end of a link is pivotally connected to the upper and lower surfaces of the nut member so as to be rotatable, and the other end of the link is assembled and pivotally connected to the upper and lower axes of a cross joint, and is connected perpendicular to the upper and lower axes of the cross joint. Parts, a core height variable mechanism, a rotating head is provided, a plurality of sets of left and right screws are threaded, and nut members are respectively screwed into screw rods, and the screw rods are rotatably mounted on the lower surface of the support base. One end of the link is rotatably pivoted on the left and right side surfaces of the nut member, and the other end of the link is assembled and pivotally attached to the left and right axes of a cross joint having a lower core connecting portion provided at the lower end. The core device of the mold for manufacturing a culvert block according to claim 1 or 2, is constituted.

According to a fourth aspect of the present invention, there is provided a support beam extending from a rear end plate or a rear portion of the underframe of the mold for manufacturing the culvert block.
A support frame provided with required clearances in the upper, front, rear, left and right directions with respect to the support beam is provided in the core device, and the support frame is loosely inserted into the support beam to support the core device. Core positioning means and core height positioning means for fitting into positioning holes provided in the front and rear plates of the culvert block manufacturing form at arbitrary positions of the upper core and the lower core. The core device of the mold for manufacturing a culvert block according to any one of claims 1 to 3, characterized in that:

[0008]

According to the first aspect, the core height (water channel depth) is used.
At the time of adjustment of the core (performed in the enlarged state of the core), first, when the head for rotation of the holding mechanism in the insertion groove provided on the left and right upper portions of the lower core is rotated counterclockwise , the upper core in the insertion groove is rotated. When the pinch is released and loosened, and the rotating head of the core height variable mechanism is rotated, the lower core connecting portion, which is the output end of the core height variable mechanism, is converted into a vertical movement, The lower core moves up and down via the movable connecting member connected to the lower core connecting portion, and the core height changes. If clockwise rotation of the rotating head-clamping mechanism, the tip portion and the lower joint member distal end portion of the inserted upper tang, core height has been adjusted it is fixed is sandwiched clamping mechanism of the insertion groove. Therefore, by adjusting the core height variable mechanism, a culvert block having a water channel depth of several sizes can be manufactured with one core device, and the number of times of replacement of the manufacturing formwork in the production line can be reduced.

When the mold is removed (when the product is taken out of the mold ), the lower joint member moves upward inside the upper joint portion of the upper core by rotating the rotating head of the core expanding / contracting mechanism in the reverse direction. However, the upper joint is also displaced inward by following it, and the core width and core height are reduced so that the core is rolled inward. Intrusion of concrete fine powder and dust into the core can be reduced.

[0010] At the time of driving (when assembling the formwork and driving in concrete), when the rotating head of the core expanding / contracting mechanism is rotated, the lower joint member moves to the outside of the upper core and the upper joint portion. Is also displaced outward, and the core width / height height dimension returns to the normal size . Since each mechanism operates by a simple rotation operation, introduction of an automatic machine becomes easy.

The holding mechanism according to the second aspect is provided in the insertion groove of the lower core so that the inserted upper core can be fixed at an arbitrary position. and right screw portion sliding nut having a threaded fit with slope to the pinching members of the cross-section U-shaped having a slope sliding contact with the sliding nut on the inside is urged core skin side, inserted the upper core sandwiching the core height and fixed, also if reverse rotation of the pivot for the head, pinching the top tang Ru is released.

According to a third aspect of the present invention, when the rotating head is rotated clockwise, the nut members screwed to the left and right screw portions of the screw rod approach 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 link and the cross joint pivotally attached is urged to the right, and the bell crank connected to the cross joint is pushed to widen the reduced core to the normal size . If the head for rotation is rotated to the left, the nut members screwed into the left and right screw portions of the threaded bar with the left and right screws are separated from each other, and the nut members are connected via the links pivotally attached to the upper and lower surfaces of the nut members. The cross joint, which is assembled at the other end of the link, is urged 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.

According to a third aspect of the present invention, when the rotating head is rotated clockwise, the nut members screwed into the left and right screw portions of the screw rod approach each other, and the upper and lower surfaces of the nut member are rotated. the via link pivotally mounted to bias the cross joints pivotally connected by a set of the link and the other end downward, the lower core linked via a linking chain to the crossing joint descending by gravity <br/> Lower the core height . Also, if the rotating head 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 other end of the link is assembled via a link pivotally attached to the left and right surfaces of the nut member. Then, the cross joint pivotally attached is urged upward, and the lower core connected to the cross joint via the connecting chain is pulled up to lower the core height.

According to the fourth aspect of the present invention, the core device is supported on the support beam extending from the rear end plate or the rear portion of the underframe with a required clearance (gap in the upward, front, back, left and right directions). When the core (the core is in a contracted state) is lifted up several millimeters by a vacuum pad (by vacuum suction), etc., and pulled out forward, the core device, which is provided with clearance on the support beam, is located at a position with low frictional resistance. Go to nature,
The product can be extracted while the core device remains on the mold, and damage such as wear and deformation of the core outer skin can be reduced or prevented . At this time, even if the core position that has shrunk and passed through the demolding process moves slightly upwards, forwards, backwards, left and right, if the mold is closed and assembled, the upper core and lower core The provided positioning means is guided and fitted into the positioning holes of the front and rear end plates which come into contact with each other, so that the core device is securely assembled at the proper position .
In addition, even when the core height is changed by operating the core height variable mechanism, the required dimensions can be reliably maintained, improving the product quality (dimensional accuracy) and eliminating the need to attach or detach the core device. The time required for each process can be reduced and the production line can be saved.

[0015]

1 to 8 show an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic configuration of the embodiment of the present invention and a state of being inserted 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 a configuration of a clamping mechanism according to claim 2, and FIG. 6 is an explanatory diagram of the operation when the core depth is changed in the embodiment of the present invention, FIG. 7 is an explanatory diagram of the operation when the core is reduced in the embodiment of the present invention, and FIG. 8 is an embodiment according to claim 4. FIG. 9 is an explanatory view of a culvert block using 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 an embodiment of the present invention and a state of being attached to a mold. A mold for a culvert block (hereinafter referred to as a mold K) indicated by a thin line is a culvert block. The product is manufactured upside down, and the bottom of the formwork is the top of the product . This figure is a view showing a state after removal of the mold (reduced core) of the present invention mounted on the mold K, and shows the front and rear end plates 02, 02 'and both side plates 03 (front end end plate) of the form K. The side plate on the right side as viewed from the side 02 is omitted) and opened in the direction of the dashed line arrow, and the core device N is contracted to the support beam 04 projecting from the rear end plate 02 'side in the upward, front-back, left-right directions. The culvert block, which is supported with a clearance (gap) provided and is cast from the direction of arrow A, is removed (pulled out) in the direction of arrow B while leaving the core device N on the formwork K. ing. Note that reference numeral 001 in the drawing denotes a movable bottom plate of the mold frame K which can be raised and lowered and tilted.

The core device N includes a lower core 100 having an upper insertion groove 120 provided with a holding mechanism 150 provided therein for slidably receiving the upper core 50 and a lower core 100 which can be inserted into the insertion groove of the lower core. consists a top core 50, the upper core 50 is the upper joint 53 is provided on one side of the vertical portion, the lower joint having a contact time of said upper joint part 53 and the seal can lower joint portion 63 A member 60 is provided, and a core height varying mechanism 300 and a core expanding / contracting mechanism 200, which will be described in detail later, are provided therein . Upper core 50 which includes a lower joint member 60 which is sandwiched into the lower core 100 is integral with the lower core 100, at the time of core reduction shown, the lower joint
Lower joint portion 63 of the member 60 is displaced inward above the upper joint 53 of the upper core 50, it is displaced at the same time the lower core 100 side sandwiching the lower joint member 60, so involving inward The core width and core height can be reduced.
The core device N shown in FIG.
A core support beam 04 extending (projecting) from 2 'is provided with a required clearance (described later) in the upward, front-back, left-right directions . The core support beam can also be supported by a core support beam 04 '(shown by a drawing line in the figure) extending from the underframe 01 of the mold.

FIG. 2 is an exploded perspective view of the embodiment of the present invention. In the upper right part of the upper core 50, the joining state of the upper joint part 53 and the lower joint member 60 is shown in a partially detailed view. The core enlargement / reduction mechanism 200 and the core height variable mechanism 300 are shown partially cut away, and the core enlargement / reduction mechanism 200 and the core height variable mechanism 300 are shown enlarged in the lower part of the figure . FIG.
1 is a front view of an embodiment of the present invention, showing a core device N in which a core height is reduced and enlarged to a regular size . An embodiment of the present invention will be described below with reference to FIGS.

The upper core 50 is formed in a substantially inverted U-shaped cross section.
The right vertical portion 51 is provided to be shorter than the left vertical portion 52, and a reinforcing rib L1 is provided so as to avoid the upper flexible portion be, and is separated from the lower joining member 60 at the lower end of the right vertical portion 51 when the core is reduced. An upper joint 53 is provided.
3, the upper connection metal fitting 53 c is fixed near the inner side, and
A rigid lower joining member 60 having a lower joining portion 63 that can be sealed (watertight) at the time of contact with the lower core 3 is provided so that the left and right lower ends of the upper core are aligned at the time of contact. Similarly, a lower connecting member 63b is provided, an upper hole 70c of the bell crank 70 is connected to the upper connecting member 53c, and an intermediate hole 70b of the bell crank 70 is connected to the lower connecting member 63b. The hole 70a is rotatably connected to the output end of the core expanding / contracting mechanism 200, and a reinforcing rib L2 is disposed from the flat portion on the upper surface of the core to the left vertical portion 52 to enhance the rigidity. Core expansion / contraction mechanism 2 to be described later
And a support base 20 for rotatably supporting the core height variable mechanism 300 and a support beam 04 inside the flat portion of the core upper surface.
Is provided, and the support frame 54 and the support beam 0 are provided.
A predetermined clearance C (gap) in which the core device N can move in the upward and leftward directions is provided between the four.

Next, a core expanding / contracting mechanism 2 provided inside the upper core
00 and the core height variable mechanism 300 will be described in detail . The core expanding / contracting mechanism 200 and the core height changing mechanism 300 are composed of a similar link mechanism for converting the turning movement of the screw rod into the left / right push / pull movement and the vertical movement of the output end. The child expansion / contraction mechanism 200 is provided horizontally, and a core height variable mechanism 300 is provided vertically on the lower surface . The core expanding / contracting mechanism 200 is provided with a rotating head 210 and a plurality of sets of left and right screws threaded.
The nut member 23 is attached to the left and right screw portions 220L and 220R of the zero.
0L and 230R are screw-fitted respectively and rotatably supported on the support base 20, and one end of a link 250 is rotatably connected to upper and lower shafts of the nut members 230L and 230R, respectively. The other end is assembled and pivotally connected to the vertical shaft 265 of the cross joint 260, and the connecting hole 270 provided orthogonal to the vertical shaft 265 is connected to the connecting hole 7 at one end of the bell crank 70.
0a . Core height variable mechanism 300
Are left and right screw portions 320L and 320R of a screw rod 320 having a plurality of sets of left and right screws which are also provided with a turning head 310.
The nut members 330L and 330R are screwed into the nut member 330, and are rotatably supported on the lower portion of the support base 20.
One end of the link 350 is pivotally connected to the left and right side axes of the L and 330R, and the other end of the link 350 is assembled and pivotally connected to the left and right axis 365 of the cross joint 360.
Height variable mechanism 3 provided with a connection hole 370 orthogonal to
00.

Next, the lower core will be described . Lower core 10
0 is formed in a substantially U-shaped cross section having a plurality of flexible portions be, and reinforcing ribs L3, L4 and the like are provided except for the flexible portions be,
An insertion groove 120 comprising an opposing wall 102 parallel to the reinforced core outer skin 101 is provided at the upper part of the left and right vertical portions.
The lower end of the left vertical portion 52 of the upper core 100 and the lower
The lower end of the side joining member 60 is inserted, and the upper core 50 is provided so as to be able to be clamped by a clamping mechanism 150 described in detail later. In consideration of the displacement of the lower core when the core is reduced, the holes 370 are connected by a connection chain 380c or a connection link 380l (shown in the drawing) having at least one provided with a long hole or the like.

With the above-described structure, when the rotating head 210 of the core expanding / contracting mechanism 200 is rotated clockwise, the nut members 230L and 230R approach each other as indicated by the arrow, and the cross joint 260 as the output end. Moves to the right, and the core height variable mechanism 300 also rotates the rotating head 310 clockwise,
The nut members 330L and 330R approach each other as indicated by an arrow, and the cross joint 360, which is the output end, operates to move downward. When the respective rotating heads are rotated in the reverse direction, the operation is reversed.

FIG. 4 is a partially cutaway perspective view of the holding mechanism according to the second aspect . The holding mechanism 150 provided in the insertion groove 120 at the upper part of the lower core 100 is provided with a rotating head 151 and a left / right screw part 152 of a screw rod 152 formed by threading a left / right screw.
L, 152R, slide nuts 123L (the front side slope is low), 123R having a slide surface on each of the contact surface 102 and the upper and lower surfaces of the insertion groove 120 and a slope SL on the other surface.
Are respectively screwed with the slope direction symmetrical, the screw rod 152 is rotatably supported by a plurality of bearings 154 provided inside the opposed wall 102, and the slope SL that slides on the slope SL of the slide nuts 123L and 123R. The holding member 160 having a U-shaped cross section is slidably brought into contact with the upper and lower sliding surfaces of the slide nut so as to be slidable only in the left and right directions.
The lower end of the left vertical portion 52 of the inserted upper core and the lower end of the lower joining member 60 (not shown) can be held between the holding surface 166 of the core 0 and the inner surface of the core outer cover 101.

FIG. 5 is a diagram for explaining the operation of the clamping mechanism.
(A) shows the case where the holding is released, and if the rotating head 151 of the holding mechanism 150 is rotated counterclockwise, the left and right screw portions 152 are opened.
Slide nuts 123L, 12 screwed into L, 152R
3R move away from each other in the direction of the arrow, and the slope SL ′ inside the holding member 160 that is in sliding contact with the slope SL of the slide nuts 123L and 123R is released, and the holding of the upper core is loose. The child height can be changed . (B) The figure shows the operation when the upper core is clamped and fixed, and when the rotating head 151 is rotated clockwise, the slide nut 123 is rotated.
The holding member 160 provided on the inner side with a slope SL ′ that is in sliding contact with the slope SL of the L, 123R is pressed in the direction of the core outer skin 101 as indicated by an arrow po, and the holding surface 166 of the holding member 160 is pressed.
The upper core inserted between the inner core 101 and the inner surface of the core 101 is held and fixed.

FIG. 6 is a view for explaining the operation when the core height is changed. The core device is widened to a normal state by operating the core expansion / contraction mechanism 200, the clamping mechanism 150 is loosened, and the core height variable mechanism 30 is released.
The case where the lower core 100 is lowered by operating 0 to change (increase) the core height is shown . When changing the core height,
First, when the rotating heads 151 of the left and right holding mechanisms 150 provided inside the insertion groove 120 of the lower core 100 are rotated counterclockwise, the holding of the upper core 50 is released . Next, when the rotating head 310 of the core height changing mechanism 300 is rotated clockwise, the two slide nuts 33 screwed into the left and right screw portions 320L and 320R.
0L and 330R move close to each other, and link 350
Moves the cross joint 360 downward, and the lower core 60 connected via the connecting member 380c (or 380l) descends by its own weight and the core height increases . Here, when the rotating head 151 of the holding mechanism 150 is rotated clockwise, the lower end of the inserted lower joining member 60 and the left vertical portion 52 of the upper core are moved.
The lower end is provided between the holding surface 166 of the holding member 160 and the core shell 1.
01 and the core height is fixed.

To lower the core height, the holding mechanism 15
0 is rotated counterclockwise to release the pinching, and the core height variable mechanism 300
If the turning head 310 is rotated counterclockwise, the left and right screw portions 32
0L, both slide nuts 330L screwed into 320R,
330R move away from each other, the cross joint 360 connected to the link 350 is raised, and the lower core 100 connected to the connecting member 380c is also raised, so that the core height is reduced .
Here, if the holding mechanism 150 is operated, the upper core is held between the holding member and the core outer skin, and the core height is fixed as described above.

[0028] FIG. 7 is an operation explanatory diagram of during demolding of Example (a reduced core retrieve the product from the mold), the rotating head-210 of the core <br/> decreasing mechanism 200 if left rotation, right and left screw portion 220L, both the nut member 230L and screwed into 220R, 230R is moved to separate from each other, each link 250 linked moves the cross joint 260 to the axis side of the threaded rod 220, The connecting hole 7 at the tip of the bell crank 70 connected to the connecting hole 270 of the intersection John Int 260
0a is pulled, and the bell crank starts to rotate around the upper hole 70c of the bell crank 70 pivotally attached to the upper connection fitting 53c.
The lower joint member 63b of the lower joint member 60 connected to the lower core member 60 starts moving inside the upper core, and as the rotation of the screw 220 proceeds, the lower joint member 60 moves upward inside the upper core,
Also in the lower core 100 holding the lower joint member 60, the plurality of flexible portions be displaced, the height of the core is reduced, and the upper joint 53 is also displaced inward following the dashed-two dotted line. The core width and the core height of the core before the reduction indicated by are reduced and the demolding becomes easy.
The connecting hole 360a of the core height changing mechanism 300
And the lower core are movably connected (by a connecting member 380c by a chain or by a connecting member 3801 provided with a long hole or the like in at least one of them). It operates without any trouble due to looseness of the chain or play such as a long hole.

At the time of casting (when the formwork is assembled and concrete is driven), the rotating head 210 of the expansion / contraction mechanism 200 is moved.
Is rotated right, the two nut members screwed into the left and right threaded portions approach each other, the link pushes the cross joint 260, and the bell crank 70 connected to the cross John joint is pushed, With the connecting portion of the upper hole 70c of the bell crank 70 as the center of rotation, first, the lower joining member connected to the lower joint member connected to the intermediate hole 70b of the bell crank also starts to return to the outside while being displaced. As the rotation of 220 progresses, the upper joint 53 also moves outward following the lower joint 60, and in the final stage, the upper joint 53 and the lower joint 6
The lower bonding portion 63, which is the bonding surface of No. 0, tightly adheres in a sealable manner,
The core width and the core height operate as a whole to return to the proper dimensions shown in FIG. 5 or FIG. The positioning means p provided on the upper core 50 and the lower core 100 in the figure will be described below.

FIG. 8 is an explanatory view of the core device according to the fourth aspect. FIG. 8 is a perspective view of the core device supported by a supporting beam protruding from the rear end plate of the formwork, and a drawing line is provided at the bottom of the figure. An explanatory view of a support beam 04 ′ and a clearance C extending from the rear portion of the underframe of the formwork is shown.

In the illustrated form K, a support beam 04 is protruded from the rear end plate 02 ', and a space between the support frame 54 and the support beam 04 provided in the core device N is provided in the upward / left / right direction when the mold is removed. -The core device N is supported by providing a clearance C that allows a margin for forward and backward movement . Further, a restricting piece 55 for restricting the movable range of the core device at the time of releasing the mold is provided on the tip end surface of the support beam 04.

With the above construction, if the product is slightly lifted by a vacuum pad or the like of the demolding machine at the time of demolding, the core outer skin and the concrete surface of the hollow portion of the product are peeled off when the product is raised several millimeters. If the mold release machine is pulled forward, there is play in the upper, front, back, left and right directions, so that the core device N
Move in the direction with less frictional resistance while being carried by
Product extraction becomes easy.

A support beam 04 'shown at the bottom of the figure extends from the rear of the underframe 01 of the formwork K, and is provided with a rear end plate 02'.
A support beam is extended from a structurally strong underframe that allows the core device to be freely inserted and supported by providing the required clearance in the same manner as described above on the support beam 04 ′ that protrudes in the horizontal direction through the This is particularly useful in the case of a core device for a large product (for example, a plurality of support beams may be used).

Next, the positioning means of the core device will be described . A sharp positioning pin p having a diameter that covers the clearance dimension is provided at an appropriate position of the upper core 50 and the lower core 100 of the core device N, and is fitted to the positioning pin p on the core device side by closing the form. Possible positioning holes p2 are provided in the front and rear end plates 02, 02 'of the formwork.

With the above structure, if the product is vacuum-adsorbed by the vacuum pad of the demolding machine at the time of demolding, the concrete in the hollow portion of the core shell and the culvert block can be obtained when the product slightly rises (several millimeters). If the surface peels off and then pulls the demolding machine forward, there is play in the upward, front, back, left and right directions, so that the core device is supported by the support beam and moves in the direction with less frictional resistance, Product removal becomes easier, and damage such as wear and deformation of the core outer skin can be reduced or prevented.
Fluctuations in the core position after removal from the mold are also corrected each time the mold is closed, and the proper dimensions when the core height is variable can be maintained.

FIG. 9 is an explanatory view of a culvert block according to the present invention. As shown in FIG. 9A, products B1, B2, etc. having several kinds of channel depths can be produced by one core device . Further, if the present invention is applied to a formwork in which the bottom part of the formwork shown in FIG. 1 can be moved up and down, the road gradient rs and the running water gradient 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 a gradient is given to the product top end (upper surface) T, the upper surface thickness of BS2 will be gradually increased from BS1 if the core depth remains unchanged, but according to the core height variable mechanism of the present invention, It can be manufactured to be several sizes deep from the channel depth h1 (shallow) to the channel depth h2 (deep) without changing the formwork of the production line, and it is possible to reduce the excess weight on the upper surface of the product and the product and construction Cost can be reduced. Note that 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 a mold for manufacturing a culvert block, the water depth of several sizes can be obtained with one core device by adjusting the core height variable mechanism (about 2 minutes). The culvert block can be manufactured, and the culvert block that can be used when the road gradient and the running water gradient are different can be produced at low cost . In addition, it is possible to reduce the replacement work of the manufacturing formwork in the production line, which took about 20 minutes conventionally, which has the effect of dramatically improving the production. The operation of the core expanding / contracting mechanism allows the core to be easily expanded / contracted. When removing the product (when removing the product from the mold), the core width and core height are reduced so that the entire core is rolled inward. This has the effect of reducing the intrusion of the concrete core, dust, etc. into the inside of the core and increasing the durability.

At the time of casting (when the formwork is assembled and concrete is driven), if the core expanding / contracting mechanism is operated in reverse, the lower joint member moves to the outside of the upper core and the upper joint portion is also added. The core moves to the outside and the core width and the core height dimension return to the normal dimensions. Since the core is expanded and contracted by a simple rotation operation, the manufacturing time can be reduced and labor can be saved.

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 rotating head of the core expanding / contracting mechanism clockwise,
By rotating the rotating head to the left, the core can be widened reliably, and by rotating the rotating head of the core height variable mechanism to the right, the core height increases. Since both mechanisms operate only by rotating operations, they can be reliably operated in a short time. In addition, since both mechanisms have substantially the same component configuration, they can be manufactured at low cost.

According to the core device of the fourth aspect, since the core device is supported with the required clearance provided by the supporting beam extending from the rear end plate or the underframe, the product is evacuated to vacuum. When the core is lifted up several millimeters and pulled forward to remove it from the mold, there is play in the upward, front, back, and left and right directions. Movement makes it easier to remove the product, prevents damage such as abrasion and deformation of the core outer shell, and even if the core that has gone through the demolding process moves slightly upward, When the core is closed (assembled with the formwork) and tightened, the positioning means provided on the upper core and lower core are guided by the positioning holes of the abutting front and rear end plates and fitted, ensuring that the core is in the correct position. Assemble and operate the core height variable mechanism to adjust the core height Even if it is changed, the required dimensions can be maintained reliably, the quality of the product (dimensional accuracy) is improved, and the removal and installation of the core device is unnecessary, so that the production line can be labor-saving and unmanned. It takes about 3 minutes to assemble the formwork, which has the effect of dramatically improving production.

[Brief description of the drawings]

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

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

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

FIG. 4 is an explanatory diagram showing a configuration of a holding mechanism according to claim 2;

FIG. 5 is an explanatory view of the operation of the clamping mechanism.

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

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

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

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

[Explanation of symbols]

 A: Removal direction be: Flexible part C: Clearance K: Formwork N: Core device 01: Underframe of formwork 02, 02 ': Front / rear plate 04: Support beam 50: Upper core 53: Upper side Joint 60 Lower joint member 70 Bell crank 100 Lower core 120 Insertion groove 150 Nipping mechanism 152 Screw rod 200 Core expansion / contraction mechanism 220 Screw rod 300 Core height variable mechanism 320 Screw rod 380c Connecting chain

Claims (4)

(57) [Claims] 1. An inner core device for forming a culvert block, wherein an upper core having a flexible portion is formed in a substantially inverted U-shaped cross section, and one vertical portion of the upper core is abutted. When the sealable upper joint and the lower joint member are provided separately, between the vicinity of the inside of the upper joint and the vicinity of the upper inside of the lower joint member,
It is connected via the upper hole and the intermediate hole of the bell crank, strengthens the rigidity from the upper surface of the upper core to the opposite side, provides a support base for the core expansion / contraction mechanism on the inner surface on the rigidity enhancement side, and has a flexible part near the bottom part A lower core having a substantially U-shaped cross section is provided, and an upper portion of the lower core is provided with an insertion groove provided with a holding mechanism for converting a rotational movement into a left-right movement, and an upper core is provided in the insertion groove. A leading end and the leading end of the lower joining member are slidably inserted, and a core expanding / contracting mechanism comprising a link mechanism for converting a turning movement of the screw rod into a left / right movement is rotatably mounted laterally on the support table, An output end of the core expansion / contraction mechanism is pivotally connected to a tip connection hole of the bell crank,
A core height variable mechanism consisting of a link mechanism for converting the turning movement of the screw rod into a vertical movement is vertically provided on the support base, and it is possible to float between the output end of the core height variable mechanism and the lower core. A core device for a mold for manufacturing an underdrain block, wherein the core device is connected via a connecting member. 2. The holding mechanism according to claim 1, wherein said holding mechanism has a rotating head.
A slide nut having a sliding surface on one side and upper and lower surfaces and a slope on the opposite side is screwed into each of the left and right screw portions of the screw rod with the right screw threaded in a symmetrical manner with respect to the slope direction. A clamping member having a U-shaped cross section, which is rotatably supported on an opposing wall facing the inner shell side of the insertion groove and has a slope that slides in contact with the slope of the slide nut, is provided on the upper and lower surfaces of the slide nut. Sliding contact and external fitting, between the back surface of the holding member and the inner surface of the core,
2. The core device according to claim 1, wherein the inserted upper core is provided so as to be clamped. Wherein said core decreasing mechanism is rotated in the support portion side of the nut member to the left and right threaded portion of the screw rod in which a plurality of sets threaded left and right screws provided for pivot head respectively screwed to Freely pivoted,
One end of a link is pivotally attached to the upper and lower surfaces of the nut member so as to be freely rotatable, the other end of the link is assembled and pivotally attached to the upper and lower axes of the cross joint, and a connecting portion orthogonal to the upper and lower axes of the cross joint is provided. A height variable mechanism is provided with a head for rotation, a nut member is screwed into each of left and right screw portions of a screw rod in which a plurality of sets of left and right screws are threaded and rotatably supported on the lower surface of the support base, One end of a link is pivotally attached to the left and right side surfaces of the nut member, and the other end of the link is assembled and pivotally attached to a left and right axis of a cross joint having a lower core connection portion provided at a lower end. 3. The core device according to claim 1, wherein the mold is used for producing a culvert block. 4. A support frame having a support beam extending from a rear end plate or a rear portion of an underframe of a culvert block manufacturing form, and having a required clearance in the upward, front, rear, left and right directions with respect to the support beam. In the apparatus, the support frame is loosely inserted into the support beam to support the core device, and the upper and lower cores of the core device are located at arbitrary positions of the front and rear wedges of the culvert block manufacturing form. 4. A core for a culvert block manufacturing form according to claim 1, further comprising a core positioning means and a core height positioning means which are fitted into positioning holes provided in the plate. apparatus.