CA1284021C - Molding device for modular concrete unit - Google Patents
Molding device for modular concrete unitInfo
- Publication number
- CA1284021C CA1284021C CA000523672A CA523672A CA1284021C CA 1284021 C CA1284021 C CA 1284021C CA 000523672 A CA000523672 A CA 000523672A CA 523672 A CA523672 A CA 523672A CA 1284021 C CA1284021 C CA 1284021C
- Authority
- CA
- Canada
- Prior art keywords
- spacer
- inner form
- board
- boards
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
- E04G11/082—Retractable forms for the inside face of at least three walls
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
Abstract of the Disclosure A molding device includes a multi-sided contractible inner form and outer forms that can be connected detachably to the inner form. The inner form has, at each side, a wedge-shaped spacer formwork board, on which are mounted a power means and a linkage mechanism, disposed between and connected detachably to left and right component formwork boards. The wedge-shaped spacer boards in all sides of the inner form can be pulled inward by individual power means through individual linkage mechanisms to leave space for the the left and right component formwork boards to approach one another at all sides to contract the entire inner form.
Description
~284~21 Title: MOLDING DEVICE FOR MODULAR CONCRETE UNIT
This invention relates to a molding device, particularly to a molding device adapted to mold box-like modular concrete units having large assembled formwork boards that can be removed entirely from the molded concrete structure and resetted ~uickly at th~
next location.
Molding devices of the above described type have existed in various forms. U.S. Patent No. 2,544,297 discloses an inner collapsible form having multiple plate parts interconnected at corners by means of loc~ing devices. The inner form collapses and is released from the molded structure when the corner plate parts are unlocked. U.S. Patent No. 3,614,054 discloses an inner form with a core frame incorporating means for collapsing and stripping the inner form from the molded structure. ~. S. Patent No. 3,934,808 discloses an inner form having side panels, end panels and corner panels. The corner panels can be pulled inward by a central single power mearls through a center linkage mechanism to leave a space between the adjacent side paneI and end panel so that the whole inner form contracts. French Patent 2~89206 discloses an inner form having internal wall shutters and wedge-shaped corner pieces which can be pulled inward by individual power means. The wedge-shaped corner pieces are not connected to the shutters and move individually . ~ .
, .. . ~ ~ .
.......
8~021 independently of the shutters.
The object of the present invention is to provide a molding device including a multi-sided contractible inner form and outer forms that can be connected detachably to the inner form. The inner form has, at each side, a wedge-shaped spacer formwork board, on which are mounted a power means and a linkage mechanism, disposed between and connected detachably to left and right component formwork boards. The wedge-shaped spacer boards in all sides of the inner form canbe pulled inward by individual power means through individual linkage mechanisms to leave space for the approach of the left and right component formwork boards at all sides to contract the entire inner form. When each spacer board moves inward, the left and right component baards move relatively and approach one another.
Each linkage mechanism includes a lever pivoted to a corresponding spacer board and connected to a hydraulic pawer means mounted on the spacer boardt crank members mounted at the upper and lower sides of the spacer board and connected to the lever with Iongitudinal links~ There are upper and lower links connecting left and right component boards to the crank members.
There are detachable connecting means for the - ` "
~Z~34~1 inner form and outer forms which includes top fastening means having a first top bar fixed to the top of the inner form and having a portion projecting outward, and a second top bar fixed to the top of the outer form and having a portion projecting inward. One of the top bars has a slot in the projecting portion thereof and clamping screws extending threadedly into the slot, and the other top bar has a protrusion in the projecting portion thereof to be inserted into the slot and to be clamped hy the clamping screws.
The detachable connecting means further includes insert spacer members to be disposed between the inner form and the outer forms, and screw fasteners for fastening the insert spacer members to the inner Eorm and the outer forms.
The molding device further includes a bottom form, bottom spacer members of truncated-cone shape attached detachably to the bottom form and projecting upward to be connected to and to support the inner form. There are also strut means to support the bottom form, and strut locating members to be embedded in part in the concrete floor to secure the lower end of the strut means.
The present exemplary preferred embodiment will be described in detail with reference to the following drawings, in which:
~?~a4~
Fig. 1 is a sectional view of a molding device of the present invention having a four-sided inner form, our outer forms and a bottom form;
Fig. 2 is an elevation view of a wedge-shaped spacer board incor~orating a power means and a linkage mechanism;
Fig. 3 is a sectional view taken along line 3-3 of Fig. 2;
Fig. 3A is a fragmentary sectional view taken along line 3A-3A of Fig. 3;
Fig. 4 is a fragmentary sectional view showing an insert spacer ~ember disposed between the inner form and the outer form;
Fig. S is a fragmentary sectional view showing a bottom spacer member;
Fig. 6 is a fragmentary sectional view showing a spacer rod disposed between the inner form and the outer form;
Fig. 7 is an elevation view showing a top fastening means of the molding device;
Fig. 8 is a ~lan view showing the top fastening means of Fig. 7;
Fig. 9 is a sectional view of a strut support body;
Fig. 10 is a ~iew showing the molding device which is set up after the concrete floor is fabricated;
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Fig. 11 is a view showing the molding device in which the inner form is support by vertical struts;
Fig. 12 is a view showing the connection between a bottom spacer member and a vertical strut; and Fig. 13 is a schematic view showing the spacer boards which are moved inward relative to the left and right component boards.
Referring to Figs. 1, 2 and 3, a molding device is shown, in its molding position, including a bottom form board 71, a four-sided inner form l and four outer forms 2 for molding a box-like concrete structure. The inner form l comprises a pair of opposing first formwork boards lla and a pair or opposing second formwork boards llb interconnecting said flrst formwork boards lla. Each of the first or second formwork boards is set up by using channel members 12 and batters 13, and includes ~eft and right component boards llc and a spa~cer board 4 between the left and right component boards llc. Each left or right componeot board llc has a concrete forming face lld, and a web lle inclining in rela~ion to the forming face lld.
The spacer board 4 has a concrete forming face 4a and two webs 4b inclining in relation to the forming face 4a and extending divergingly from the forming face 4a, forming a wedge shape In cross-section. The webs '1, ;.! ' - ' ' ' ' ~,..,.. ' "
` ``` ~%~34~
4b of the spacer board 4 abut with and are secured to the webs lle of the right and left component boards llc by means of bolts 412.
A hydraulic cylinder 42, which is used to provide power to move each spacer board 4 inward and outward relative to left and right formwork boards 11;, is mounted on a bracket 421 fixed to a transverse plate 423 which is secured to the webs 4b of the spacer board 4. The hydraulic cylinder 42 has a piston rod 422 connected to one end A of a lever 43 which is pivoted, at point B, to a bracket 432 mounted on a fixed support member 431 below the hydraulic cylinder 42. An upper longitudinal link 433 is connected to the lever 43 at a point C and extends therefrom longitudinally upward.
At the end point D of the lever 43 is connected a lower longitudinal link 434 which extends longitudinally downward therefrom. The points D and C are on two sides of the point B.
Each of links 433 and 434 is connected to crank means 44 provided at the top and bottom of the spacer board 4. Each crank means 44 has an arm 445 connected to the end of link 433 or 434 and extending from a crank shaft 441 journalled in two journal supports 444 of the spacer board 4. Two arms 442 extend from crank wheels 44 disposed at the ends of the crank shaft 441.
The arms 442 are connected pivotally to two links 443 respectively which are connected pivotally to the ~%8~C)21 adjacent left and right component boards llc. The operation of the hydraulic cylinder and the above linkage mechanism will be described hereinafter~
The webs 4b of the spacer board 4 are connected movably to the webs lle of the left and right component boards llc by using bolt~ 412. Each bolt 412 is threaded through a screw hole of one of the webs 4b into a block 411 which is fitted movably in an elongated guide groove 111 provided in the web lle of the left or right component board llc, as shown in Figs. 3~ and 3B. The blocks 411 can move in the grooves 111 when the spacer board 4 is moved relative to the left and right component boards. Angled brackets 413 are fixed to the webs 4b and then screwed to the left and right component boards 11~ to secure detachably the spacer board 4 to the left and right component boards llc. In this situation, the spacer boards 4 are wedged in between the adjacent left and right component boards, and the forming faces 4a thereof are flush with the forming faces of the left and right component boards 11~. The whole inner form 1 is in a completely expanded position for molding.
Each outer form board 2 is assembled using modular boards, channel members 22 and batters 23 and 24, and is secured to each side of the formwork board of the inner form 1 by securing means. The forming faces of the outer form boards are spaced apart from the forming 84~
faces of the inner form 1.
The securing means includes insert spacer members incorporating screw fasteners for fastening and spacing the forming faces of the outer form 2 and the inne.r form la, and top fastening means 6 for hanging the outer forms 2 on the inner form 1.
The insert spacer members 5 can be truncated cone-shaped insert bodies 5A and/or insert rods 5B as shown in Figs. 4 and 6. The insert spacer members 5A and SB are disposed between the forming faces of the lower sides of the outer forms 2 and the inner form 1 and are screwed to the channel members 22 and 12 of the outer forms 2 and the inner form 1 by using bolts 51 and 52.
qlhe truncated cone-shaped insert members.5A can be made of concrete, cast iron or the like. Each of them has two opposlte threaded bores for engaging with the bolts 51 which are attached to the channel member 22 . ~ or 21. The insert rod 5B is a screw rod having two threaded ends for engaging with the bolts 52 having threaded bores.
As shown in Figs. 7 and 8, the top fastener means 6 includes top bars 61 secured transversely to a top channeI member 12 of the inner form 1 at approprlate ~ locations, and top bars 62 secured transversely to a top channel member 22 of the outer forms 2 at appropriate locations. Each of the Eirst bars 61 has a portion projecting outward and a protrusion 611 of )2~
.
square cross-section at the top side of said portion.
Each of the second bars 62 has a portion projecting inward and has a coupling member 623 disposed fixedly at the top side of said projecting portion. The coupllng member 623 has a square slot 621 to receive the protrusion 611 and a rectangular slot 622 near the slot 621. Four clamp~ng screws 63 are attached threadedly to the coupling member 623 and extend into the slot 621 in directions perpendicular to four sides of the slot 621 respectively. The rear portion of one of the clamping screws 63 extends in the rectangular slot 622. In assembly, the coupling member 623 of the seco~d bar 62 is brought to overlap the projecting portion of the bar 61 so that the protrusion 611 is received in the slot 621 of the coupling member 623. Then, the protrusion 611 is clamped tightly ln the slot 621 by the clamping screws 63, thereby fastening the top sides of the outer forms 2 to the top side of the inner form 1. Alternatively, the top 2~ fastener means 6 may be a fastening bar 64 which arP
screwed to the top side of the outer form 2 and the top side of the inner form 1 at its two ends.
Referring to Figs. ~ 1 and 5, the bottom formwork board 71 is held by horizontal beams 72 and vertical struts t not shown)~ The bottom side of the whole inner form 1 is supported by and spaced apart from the top face of the bottom formwork board 71 by using ~ZB4~1 1~
spacer members ~C. The spacer members 5C are truncated cone-shaped insert bodies which are placed on and screwed to the bottom formwork board 71.
The molding device set up as described above can ~5 be used repeatedly and conveniently for casting modular concrete units. The inner form 1, outer forms 2, and bottom formwork board 71 can be detached from each other and carried to a next location without being disassembled into small units. The inner form can be loosened and contracted to be released from the concrete structure by detaching the wedge-shaped spacer boards 4 from the left and right component boards llc and moving them o~tward from between the left and right component boards llc with the hydraulic means. Af~er the inner form 1 is contracted it is lifted upward as a whole and sent to the next location. Before the inner form 1 is installed at the next location, the bottom form board 1 must be set up. Then the inner form 1 is p~ut on the spacer insert bodies Sc which are attacheà
to the bottom formwork board 71. By operating the hydraalic means, the spacer boards 4 can be moved again into between left and right component boards llc to expand the whole inner form l tightly to the molding position.
Referring to Figs. 2 and 3, when each wedge-shaped spacer boards 4 is to be pulled inward it is unfastened from the left and right component boards llc ; . '' ' .,, . " . . .
~ . _ .
. .
~28~L0Z~L
by detaching screws 413. The hydraulic cylinder 42 is operated to move piston rod 422 to push the lever 43 to turn counter-clockwise about point B. In this situation, the link 433 and 434 are moved in the S direction towards the mid portion of the spacer board 4 from the bottom side and the top side, thus rotating the respective crank members 44. The crank members 44, in turn, move the respective links 443 in the direction towards the forming face of the left and right component boards llc, thereby moving the spacer board 4 inward. When the spacer board 4 moves inward, it causes the adjacent left and right component boards llc to approach one another, thus contracting the inne~ form 1 and releasing it from the concrete structure, as shown in Fig. 13.
If the piston rod of each hydraulic cylinder 42 is pulled inward, the directions of the movements of the lever 43, links 433 and 434, crank members 44 and links 443 are reversed, and each spacer boards is moved again into between the adjacent left and right component boards~
It is described hereinabove that the inner form is supported by the bottom form board 71 by means of ~ spacer members 5C when the concrete floor is cast simultaneously witn the molding of the concrete wall.
Alternatively, the inner form 1 can be set up after the concrete floor is cast. As shown in Figs. 9 and 10, ~.2~
in casting the concrete floor, truncated cone-shaped support bodies 5E are concealed in part in the concrete before the concrete is hardened, the top side of the support bodies being exposed on the surface of the concrete. Each support body SE has a threaded bore 5,4 and an adjustable threaded core 55 received in the bore 54. There are screw holes 56, 57 and 58 provided in the body 54 and core 55. When the concrete hardens, the support bodies 5E are secured in the concrete floor as shown. At this time, concrete walls can be fabricated by setting up the inner form 1 and outer forms 2, The channel members 12 of the inner form 1 can be connected to the support bodies 5E by inserting screws 59 into the threaded bores 58 of the core 55.
The support bodies SE secured in a concrete floor can also be used for supporting an inner form 1 which is set up to mold the next wall structure or an bottom form 71 to mold the next concrete floor in a second floor above. As shown in Fig. 11 , vertical struts 9 are set upright with their lower ends screwed to the cores 55 of the support bodie~s 5E. The top end of each strut 9 is screwed to the beam 72 and the bottom form board 71 for supporting the form board 71.
The height of the structs can be adjusted by rotating the core 55 relative to the support body 5E.
To immobilize the insert spacer members 5C
.,.
~.
~284C~2~
.
disposed on the bottom form board 71, the spacer members SC can be screwed to hollow heads 91 of the struts 9, as shown in Fig. 12. By using vertical struts 9 and support bodies 5E, the whole weight of the inner form 1 and ol~ter forms 2 can be borne by the completely hardened concrete of a lower floor.
Although the inner form 1 described in the present embodiment is a four-sided closed form, the present invention is not limited to four sides only. The inner form l can be a closed form having more or less than four sides or an open form having three sides or more than three sides.
With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the scope of the invention. It is therefore intended that the invention be limited as Indicated in the appended claims.
This invention relates to a molding device, particularly to a molding device adapted to mold box-like modular concrete units having large assembled formwork boards that can be removed entirely from the molded concrete structure and resetted ~uickly at th~
next location.
Molding devices of the above described type have existed in various forms. U.S. Patent No. 2,544,297 discloses an inner collapsible form having multiple plate parts interconnected at corners by means of loc~ing devices. The inner form collapses and is released from the molded structure when the corner plate parts are unlocked. U.S. Patent No. 3,614,054 discloses an inner form with a core frame incorporating means for collapsing and stripping the inner form from the molded structure. ~. S. Patent No. 3,934,808 discloses an inner form having side panels, end panels and corner panels. The corner panels can be pulled inward by a central single power mearls through a center linkage mechanism to leave a space between the adjacent side paneI and end panel so that the whole inner form contracts. French Patent 2~89206 discloses an inner form having internal wall shutters and wedge-shaped corner pieces which can be pulled inward by individual power means. The wedge-shaped corner pieces are not connected to the shutters and move individually . ~ .
, .. . ~ ~ .
.......
8~021 independently of the shutters.
The object of the present invention is to provide a molding device including a multi-sided contractible inner form and outer forms that can be connected detachably to the inner form. The inner form has, at each side, a wedge-shaped spacer formwork board, on which are mounted a power means and a linkage mechanism, disposed between and connected detachably to left and right component formwork boards. The wedge-shaped spacer boards in all sides of the inner form canbe pulled inward by individual power means through individual linkage mechanisms to leave space for the approach of the left and right component formwork boards at all sides to contract the entire inner form. When each spacer board moves inward, the left and right component baards move relatively and approach one another.
Each linkage mechanism includes a lever pivoted to a corresponding spacer board and connected to a hydraulic pawer means mounted on the spacer boardt crank members mounted at the upper and lower sides of the spacer board and connected to the lever with Iongitudinal links~ There are upper and lower links connecting left and right component boards to the crank members.
There are detachable connecting means for the - ` "
~Z~34~1 inner form and outer forms which includes top fastening means having a first top bar fixed to the top of the inner form and having a portion projecting outward, and a second top bar fixed to the top of the outer form and having a portion projecting inward. One of the top bars has a slot in the projecting portion thereof and clamping screws extending threadedly into the slot, and the other top bar has a protrusion in the projecting portion thereof to be inserted into the slot and to be clamped hy the clamping screws.
The detachable connecting means further includes insert spacer members to be disposed between the inner form and the outer forms, and screw fasteners for fastening the insert spacer members to the inner Eorm and the outer forms.
The molding device further includes a bottom form, bottom spacer members of truncated-cone shape attached detachably to the bottom form and projecting upward to be connected to and to support the inner form. There are also strut means to support the bottom form, and strut locating members to be embedded in part in the concrete floor to secure the lower end of the strut means.
The present exemplary preferred embodiment will be described in detail with reference to the following drawings, in which:
~?~a4~
Fig. 1 is a sectional view of a molding device of the present invention having a four-sided inner form, our outer forms and a bottom form;
Fig. 2 is an elevation view of a wedge-shaped spacer board incor~orating a power means and a linkage mechanism;
Fig. 3 is a sectional view taken along line 3-3 of Fig. 2;
Fig. 3A is a fragmentary sectional view taken along line 3A-3A of Fig. 3;
Fig. 4 is a fragmentary sectional view showing an insert spacer ~ember disposed between the inner form and the outer form;
Fig. S is a fragmentary sectional view showing a bottom spacer member;
Fig. 6 is a fragmentary sectional view showing a spacer rod disposed between the inner form and the outer form;
Fig. 7 is an elevation view showing a top fastening means of the molding device;
Fig. 8 is a ~lan view showing the top fastening means of Fig. 7;
Fig. 9 is a sectional view of a strut support body;
Fig. 10 is a ~iew showing the molding device which is set up after the concrete floor is fabricated;
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Fig. 11 is a view showing the molding device in which the inner form is support by vertical struts;
Fig. 12 is a view showing the connection between a bottom spacer member and a vertical strut; and Fig. 13 is a schematic view showing the spacer boards which are moved inward relative to the left and right component boards.
Referring to Figs. 1, 2 and 3, a molding device is shown, in its molding position, including a bottom form board 71, a four-sided inner form l and four outer forms 2 for molding a box-like concrete structure. The inner form l comprises a pair of opposing first formwork boards lla and a pair or opposing second formwork boards llb interconnecting said flrst formwork boards lla. Each of the first or second formwork boards is set up by using channel members 12 and batters 13, and includes ~eft and right component boards llc and a spa~cer board 4 between the left and right component boards llc. Each left or right componeot board llc has a concrete forming face lld, and a web lle inclining in rela~ion to the forming face lld.
The spacer board 4 has a concrete forming face 4a and two webs 4b inclining in relation to the forming face 4a and extending divergingly from the forming face 4a, forming a wedge shape In cross-section. The webs '1, ;.! ' - ' ' ' ' ~,..,.. ' "
` ``` ~%~34~
4b of the spacer board 4 abut with and are secured to the webs lle of the right and left component boards llc by means of bolts 412.
A hydraulic cylinder 42, which is used to provide power to move each spacer board 4 inward and outward relative to left and right formwork boards 11;, is mounted on a bracket 421 fixed to a transverse plate 423 which is secured to the webs 4b of the spacer board 4. The hydraulic cylinder 42 has a piston rod 422 connected to one end A of a lever 43 which is pivoted, at point B, to a bracket 432 mounted on a fixed support member 431 below the hydraulic cylinder 42. An upper longitudinal link 433 is connected to the lever 43 at a point C and extends therefrom longitudinally upward.
At the end point D of the lever 43 is connected a lower longitudinal link 434 which extends longitudinally downward therefrom. The points D and C are on two sides of the point B.
Each of links 433 and 434 is connected to crank means 44 provided at the top and bottom of the spacer board 4. Each crank means 44 has an arm 445 connected to the end of link 433 or 434 and extending from a crank shaft 441 journalled in two journal supports 444 of the spacer board 4. Two arms 442 extend from crank wheels 44 disposed at the ends of the crank shaft 441.
The arms 442 are connected pivotally to two links 443 respectively which are connected pivotally to the ~%8~C)21 adjacent left and right component boards llc. The operation of the hydraulic cylinder and the above linkage mechanism will be described hereinafter~
The webs 4b of the spacer board 4 are connected movably to the webs lle of the left and right component boards llc by using bolt~ 412. Each bolt 412 is threaded through a screw hole of one of the webs 4b into a block 411 which is fitted movably in an elongated guide groove 111 provided in the web lle of the left or right component board llc, as shown in Figs. 3~ and 3B. The blocks 411 can move in the grooves 111 when the spacer board 4 is moved relative to the left and right component boards. Angled brackets 413 are fixed to the webs 4b and then screwed to the left and right component boards 11~ to secure detachably the spacer board 4 to the left and right component boards llc. In this situation, the spacer boards 4 are wedged in between the adjacent left and right component boards, and the forming faces 4a thereof are flush with the forming faces of the left and right component boards 11~. The whole inner form 1 is in a completely expanded position for molding.
Each outer form board 2 is assembled using modular boards, channel members 22 and batters 23 and 24, and is secured to each side of the formwork board of the inner form 1 by securing means. The forming faces of the outer form boards are spaced apart from the forming 84~
faces of the inner form 1.
The securing means includes insert spacer members incorporating screw fasteners for fastening and spacing the forming faces of the outer form 2 and the inne.r form la, and top fastening means 6 for hanging the outer forms 2 on the inner form 1.
The insert spacer members 5 can be truncated cone-shaped insert bodies 5A and/or insert rods 5B as shown in Figs. 4 and 6. The insert spacer members 5A and SB are disposed between the forming faces of the lower sides of the outer forms 2 and the inner form 1 and are screwed to the channel members 22 and 12 of the outer forms 2 and the inner form 1 by using bolts 51 and 52.
qlhe truncated cone-shaped insert members.5A can be made of concrete, cast iron or the like. Each of them has two opposlte threaded bores for engaging with the bolts 51 which are attached to the channel member 22 . ~ or 21. The insert rod 5B is a screw rod having two threaded ends for engaging with the bolts 52 having threaded bores.
As shown in Figs. 7 and 8, the top fastener means 6 includes top bars 61 secured transversely to a top channeI member 12 of the inner form 1 at approprlate ~ locations, and top bars 62 secured transversely to a top channel member 22 of the outer forms 2 at appropriate locations. Each of the Eirst bars 61 has a portion projecting outward and a protrusion 611 of )2~
.
square cross-section at the top side of said portion.
Each of the second bars 62 has a portion projecting inward and has a coupling member 623 disposed fixedly at the top side of said projecting portion. The coupllng member 623 has a square slot 621 to receive the protrusion 611 and a rectangular slot 622 near the slot 621. Four clamp~ng screws 63 are attached threadedly to the coupling member 623 and extend into the slot 621 in directions perpendicular to four sides of the slot 621 respectively. The rear portion of one of the clamping screws 63 extends in the rectangular slot 622. In assembly, the coupling member 623 of the seco~d bar 62 is brought to overlap the projecting portion of the bar 61 so that the protrusion 611 is received in the slot 621 of the coupling member 623. Then, the protrusion 611 is clamped tightly ln the slot 621 by the clamping screws 63, thereby fastening the top sides of the outer forms 2 to the top side of the inner form 1. Alternatively, the top 2~ fastener means 6 may be a fastening bar 64 which arP
screwed to the top side of the outer form 2 and the top side of the inner form 1 at its two ends.
Referring to Figs. ~ 1 and 5, the bottom formwork board 71 is held by horizontal beams 72 and vertical struts t not shown)~ The bottom side of the whole inner form 1 is supported by and spaced apart from the top face of the bottom formwork board 71 by using ~ZB4~1 1~
spacer members ~C. The spacer members 5C are truncated cone-shaped insert bodies which are placed on and screwed to the bottom formwork board 71.
The molding device set up as described above can ~5 be used repeatedly and conveniently for casting modular concrete units. The inner form 1, outer forms 2, and bottom formwork board 71 can be detached from each other and carried to a next location without being disassembled into small units. The inner form can be loosened and contracted to be released from the concrete structure by detaching the wedge-shaped spacer boards 4 from the left and right component boards llc and moving them o~tward from between the left and right component boards llc with the hydraulic means. Af~er the inner form 1 is contracted it is lifted upward as a whole and sent to the next location. Before the inner form 1 is installed at the next location, the bottom form board 1 must be set up. Then the inner form 1 is p~ut on the spacer insert bodies Sc which are attacheà
to the bottom formwork board 71. By operating the hydraalic means, the spacer boards 4 can be moved again into between left and right component boards llc to expand the whole inner form l tightly to the molding position.
Referring to Figs. 2 and 3, when each wedge-shaped spacer boards 4 is to be pulled inward it is unfastened from the left and right component boards llc ; . '' ' .,, . " . . .
~ . _ .
. .
~28~L0Z~L
by detaching screws 413. The hydraulic cylinder 42 is operated to move piston rod 422 to push the lever 43 to turn counter-clockwise about point B. In this situation, the link 433 and 434 are moved in the S direction towards the mid portion of the spacer board 4 from the bottom side and the top side, thus rotating the respective crank members 44. The crank members 44, in turn, move the respective links 443 in the direction towards the forming face of the left and right component boards llc, thereby moving the spacer board 4 inward. When the spacer board 4 moves inward, it causes the adjacent left and right component boards llc to approach one another, thus contracting the inne~ form 1 and releasing it from the concrete structure, as shown in Fig. 13.
If the piston rod of each hydraulic cylinder 42 is pulled inward, the directions of the movements of the lever 43, links 433 and 434, crank members 44 and links 443 are reversed, and each spacer boards is moved again into between the adjacent left and right component boards~
It is described hereinabove that the inner form is supported by the bottom form board 71 by means of ~ spacer members 5C when the concrete floor is cast simultaneously witn the molding of the concrete wall.
Alternatively, the inner form 1 can be set up after the concrete floor is cast. As shown in Figs. 9 and 10, ~.2~
in casting the concrete floor, truncated cone-shaped support bodies 5E are concealed in part in the concrete before the concrete is hardened, the top side of the support bodies being exposed on the surface of the concrete. Each support body SE has a threaded bore 5,4 and an adjustable threaded core 55 received in the bore 54. There are screw holes 56, 57 and 58 provided in the body 54 and core 55. When the concrete hardens, the support bodies 5E are secured in the concrete floor as shown. At this time, concrete walls can be fabricated by setting up the inner form 1 and outer forms 2, The channel members 12 of the inner form 1 can be connected to the support bodies 5E by inserting screws 59 into the threaded bores 58 of the core 55.
The support bodies SE secured in a concrete floor can also be used for supporting an inner form 1 which is set up to mold the next wall structure or an bottom form 71 to mold the next concrete floor in a second floor above. As shown in Fig. 11 , vertical struts 9 are set upright with their lower ends screwed to the cores 55 of the support bodie~s 5E. The top end of each strut 9 is screwed to the beam 72 and the bottom form board 71 for supporting the form board 71.
The height of the structs can be adjusted by rotating the core 55 relative to the support body 5E.
To immobilize the insert spacer members 5C
.,.
~.
~284C~2~
.
disposed on the bottom form board 71, the spacer members SC can be screwed to hollow heads 91 of the struts 9, as shown in Fig. 12. By using vertical struts 9 and support bodies 5E, the whole weight of the inner form 1 and ol~ter forms 2 can be borne by the completely hardened concrete of a lower floor.
Although the inner form 1 described in the present embodiment is a four-sided closed form, the present invention is not limited to four sides only. The inner form l can be a closed form having more or less than four sides or an open form having three sides or more than three sides.
With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the scope of the invention. It is therefore intended that the invention be limited as Indicated in the appended claims.
Claims (7)
1. A molding device comprising:
an inner form having a multiplicity of sides each of which has a left component board, a right component board and a wedge-like spacer board disposed between said left and right component boards, said spacer board having a forming face and two opposing webs inclining flaredly against said forming face of said spacer board, each of said left and right component boards having a forming face and an inclined web abutting with one of said webs of said spacer board;
means for connecting movably each of said spacer boards to said left and right component boards;
means for moving each of said spacer boards forward in between said left and right component boards to expand said inner form tightly to the molding position and backward to loosen and contract said inner form so as to release it from the molded concrete, said moving means including a hydraulic power means mounted on said spacer board, a lever pivotally mounted to said spacer board and connected to said hydraulic power means, crank members mounted on the upper and lower sides of said spacer board, first link members interconnecting said lever and said crank members, and second link members interconnecting said crank members and said left and right component boards and third link members interconnecting said crank members to said left and right component boards;
outer forms spaced apart from said inner form and connected to each of said sides of said inner form; and means for connecting detachably said inner form and said outer forms.
an inner form having a multiplicity of sides each of which has a left component board, a right component board and a wedge-like spacer board disposed between said left and right component boards, said spacer board having a forming face and two opposing webs inclining flaredly against said forming face of said spacer board, each of said left and right component boards having a forming face and an inclined web abutting with one of said webs of said spacer board;
means for connecting movably each of said spacer boards to said left and right component boards;
means for moving each of said spacer boards forward in between said left and right component boards to expand said inner form tightly to the molding position and backward to loosen and contract said inner form so as to release it from the molded concrete, said moving means including a hydraulic power means mounted on said spacer board, a lever pivotally mounted to said spacer board and connected to said hydraulic power means, crank members mounted on the upper and lower sides of said spacer board, first link members interconnecting said lever and said crank members, and second link members interconnecting said crank members and said left and right component boards and third link members interconnecting said crank members to said left and right component boards;
outer forms spaced apart from said inner form and connected to each of said sides of said inner form; and means for connecting detachably said inner form and said outer forms.
2. A molding device as claimed in Claim 1, wherein said movably connecting means includes slide grooves provided in said webs of said left and right component boards and screw members attached to said webs of said spacer board and projecting into said slide grooves.
3. A molding device as claimed in Claim 1, wherein said detachable connecting means includes top fastening means for fastening the top of said outer form to the top of said inner form having a top bar fixed to the top of said inner form with a portion projecting outward, and a top bar fixed to the top of said outer form with a portion projecting inward, one of said top bars having a slot in said projecting portion thereof and clamping screws extending transversely into said slot, the other one of said top bars having a protrusion in said projecting portion to be inserted into said slot and to be clamped by said clamping screws.
4. A molding device as claimed in Claim 1, wherein said detachable connecting means further includes insert spacer members to be disposed between said inner form and said outer forms, and screw fasteners for fastening said insert spacer members to said inner form and said outer forms.
5. A molding device as claimed in Claim 1, further comprising a bottom form, bottom insert spacer members of truncated-cone shape attached detachably to said bottom form and projecting upward to connect to and to support said inner form.
6. A molding device as claimed in Claim 5, further comprising strut means to support said bottom form, and strut locating members partially embedded in a previously formed concrete floor to secure a lower end of said strut means.
7. A molding device as claimed in Claim 6, wherein said strut means has a hollow head to be connected to said bottom insert spacer member.
0221b/1-3
0221b/1-3
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60-265190 | 1985-11-26 | ||
| JP26591085A JPS62153464A (en) | 1985-11-26 | 1985-11-26 | Mold frame insert apparatus |
| GB8604566 | 1986-02-25 | ||
| GB8604566A GB2186835B (en) | 1986-02-25 | 1986-02-25 | Moulding device for modular concrete unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1284021C true CA1284021C (en) | 1991-05-14 |
Family
ID=26290398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000523672A Expired - Lifetime CA1284021C (en) | 1985-11-26 | 1986-11-24 | Molding device for modular concrete unit |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0225093B1 (en) |
| AU (1) | AU563862B2 (en) |
| CA (1) | CA1284021C (en) |
| DE (1) | DE3669683D1 (en) |
| ES (1) | ES2014988B3 (en) |
| GR (1) | GR3000401T3 (en) |
| IN (1) | IN166742B (en) |
| MX (1) | MX161078A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU607139B2 (en) * | 1986-06-03 | 1991-02-28 | Waco Kwikform Pty. Limited | Hydraulic self climbing formwork |
| JPH071435Y2 (en) * | 1988-03-02 | 1995-01-18 | 淵河 李 | Force transmission mechanism of mold |
| US4957272A (en) * | 1989-06-23 | 1990-09-18 | Lee Yuan Ho | Modular concrete form |
| US5230907A (en) * | 1991-05-16 | 1993-07-27 | Strickland Industries, Inc. | Inside corner form |
| US5552103A (en) * | 1995-01-18 | 1996-09-03 | Lee; Wen-Yuan | Form set-up and method for stripping upright form panels of the form set-up from a concrete unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH511995A (en) * | 1969-08-12 | 1971-08-31 | Helfenstein Gerhard | Internal formwork for buildings |
| FR2168694A5 (en) * | 1972-01-20 | 1973-08-31 | Tuyaux Bonna | |
| FR2529243A1 (en) * | 1982-06-23 | 1983-12-30 | Cercomat | Shutter for casting concave concrete structures - has key corner piece articulated to main shutters movable by jacks |
-
1986
- 1986-08-20 IN IN634/CAL/86A patent/IN166742B/en unknown
- 1986-11-14 EP EP19860308913 patent/EP0225093B1/en not_active Expired
- 1986-11-14 DE DE8686308913T patent/DE3669683D1/en not_active Expired - Lifetime
- 1986-11-14 ES ES86308913T patent/ES2014988B3/en not_active Expired - Lifetime
- 1986-11-24 CA CA000523672A patent/CA1284021C/en not_active Expired - Lifetime
- 1986-11-25 AU AU65660/86A patent/AU563862B2/en not_active Ceased
- 1986-11-26 MX MX444486A patent/MX161078A/en unknown
-
1990
- 1990-03-22 GR GR90400118T patent/GR3000401T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2014988B3 (en) | 1990-08-01 |
| IN166742B (en) | 1990-07-14 |
| DE3669683D1 (en) | 1990-04-26 |
| MX161078A (en) | 1990-07-24 |
| GR3000401T3 (en) | 1991-06-28 |
| EP0225093B1 (en) | 1990-03-21 |
| EP0225093A1 (en) | 1987-06-10 |
| AU6566086A (en) | 1987-05-28 |
| AU563862B2 (en) | 1987-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |