CA1302114C - Device for filling up of recess left in concrete wall after removal of separator terminal - Google Patents
Device for filling up of recess left in concrete wall after removal of separator terminalInfo
- Publication number
- CA1302114C CA1302114C CA000563891A CA563891A CA1302114C CA 1302114 C CA1302114 C CA 1302114C CA 000563891 A CA000563891 A CA 000563891A CA 563891 A CA563891 A CA 563891A CA 1302114 C CA1302114 C CA 1302114C
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- Canada
- Prior art keywords
- diameter
- end surface
- reduced portion
- main body
- separator
- Prior art date
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Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to a device for filling up a recess left in a concrete wall after removal of a separator terminal, said device comprising a main body including a circumferential step formed around its outer periphery at a longitudinal intermediate location so that said circumferential step defines a diameter-reduced portion and a diameter-enlarged portion of said main body, a threaded hole centrally formed and axially extending in an end surface of said diameter-reduced portion to be engaged with a threaded end of the separator, tool receiving means formed in an end surface of said diameter-enlarged portion and an elastic water-swollen rubber cylinder put around said diameter-reduced portion so that an outer periphery of said cylinder is tapered towards the end surface of said diameter-reduced portion and an end surface of said cylinder looking towards the end surface of said diameter-enlarged portion bears against said step of said main body while the end surface of said cylinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced portion.
The present invention relates to a device for filling up a recess left in a concrete wall after removal of a separator terminal, said device comprising a main body including a circumferential step formed around its outer periphery at a longitudinal intermediate location so that said circumferential step defines a diameter-reduced portion and a diameter-enlarged portion of said main body, a threaded hole centrally formed and axially extending in an end surface of said diameter-reduced portion to be engaged with a threaded end of the separator, tool receiving means formed in an end surface of said diameter-enlarged portion and an elastic water-swollen rubber cylinder put around said diameter-reduced portion so that an outer periphery of said cylinder is tapered towards the end surface of said diameter-reduced portion and an end surface of said cylinder looking towards the end surface of said diameter-enlarged portion bears against said step of said main body while the end surface of said cylinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced portion.
Description
13~`Zll~
The Present inventlon relates to a devlce for filling uP a recess left in a concrete wall after removal of a separator terminal when molds are disassembled in construction of the concrete wall and.
more ParticularlY~ to such device comPrisins a main body and an elastic water-swollen rubber cylindrical component fixed on said main bodY so that said elastic rubber cYllndrical component is water-swollen to perfectlY fill up said recess for a high water seallng effect.
In constructing the above-mentioned concrete structure such as the concrete wall, the seParator is usually used to hold each pair of molds opposed to each other at a predetermined distace and such seParator is left embedded in the concerete structure after comPle$ion of this structure. More Partlcularly~ each seParator ls Provided on its opPosite ends with separator terminals, resPectivelY~ and these seParator ~3C~211~
terminals are removed when the molds are dlsassembled upon complet~on of the construciton. Thls results in formatlon of a recess in the concrete wall in a region which has been occuPied bY each of the separator terminals. Such recess must be filled up in a suitable manner for water-sealing effect.
One well-known device for filling uP the above-mentioned recess has alreadY been disclosed in UtilitY
Model Publication No . 56-1843.
Accordins to the invention disclosed by this Utility Model Publication. an annular packing made of rubber. sYnthetic resin sPonse~ rubber immersed sYnthetic resin sPonge or other Plastic material is placed around the threaded and of the seParator proiectlng into the recess left in the concrete wall after the seParator terminal has been removed and then a flanged cap is hammer-driven or pressed against said packing so that a hole of said flanged caP tishtlY
receives said threaded end of the seParator~ In this way, the packing is held between a bottom surface of the recess and the flange of the cap and said Packins water-seals the Projecting end of the seParator.
However, this device of prior art is aCcompanied with problems as follow:
( I ) No adequate area is available along whlch the packing is contact with the Inner surface of the 13C~2~
recess.
The Present inventlon relates to a devlce for filling uP a recess left in a concrete wall after removal of a separator terminal when molds are disassembled in construction of the concrete wall and.
more ParticularlY~ to such device comPrisins a main body and an elastic water-swollen rubber cylindrical component fixed on said main bodY so that said elastic rubber cYllndrical component is water-swollen to perfectlY fill up said recess for a high water seallng effect.
In constructing the above-mentioned concrete structure such as the concrete wall, the seParator is usually used to hold each pair of molds opposed to each other at a predetermined distace and such seParator is left embedded in the concerete structure after comPle$ion of this structure. More Partlcularly~ each seParator ls Provided on its opPosite ends with separator terminals, resPectivelY~ and these seParator ~3C~211~
terminals are removed when the molds are dlsassembled upon complet~on of the construciton. Thls results in formatlon of a recess in the concrete wall in a region which has been occuPied bY each of the separator terminals. Such recess must be filled up in a suitable manner for water-sealing effect.
One well-known device for filling uP the above-mentioned recess has alreadY been disclosed in UtilitY
Model Publication No . 56-1843.
Accordins to the invention disclosed by this Utility Model Publication. an annular packing made of rubber. sYnthetic resin sPonse~ rubber immersed sYnthetic resin sPonge or other Plastic material is placed around the threaded and of the seParator proiectlng into the recess left in the concrete wall after the seParator terminal has been removed and then a flanged cap is hammer-driven or pressed against said packing so that a hole of said flanged caP tishtlY
receives said threaded end of the seParator~ In this way, the packing is held between a bottom surface of the recess and the flange of the cap and said Packins water-seals the Projecting end of the seParator.
However, this device of prior art is aCcompanied with problems as follow:
( I ) No adequate area is available along whlch the packing is contact with the Inner surface of the 13C~2~
recess.
(2) Upon contractlon as the Years go. there is develoPed a gaP between the inner surface of the recess and the Packins-With a consequence. the packing can not provide asatisfactorY water-sealing effect.
A Principal ob~ect of the present invention is to provide a device for filling uP a recess left in the concrete wall after removal of the separator terminal with a high water-sealing effect and therebY to solve the above-mentioned Problems.
Another ob~ect of the presnt invention is to provide said device which can be constructed from relativelY few parts in a simPle structure, easilY
manufactured at a low cost and easilY maniPulated.
The present inventlon Provides a device for filling up a recess left in a concrete wall after removal of a separator terminal, said device comprislng a maln bodY
including a circumferential step formed around its outer Periphery at a longitudinal intermediate locatlon so that said clrcumferential steP defines a dlameter-reduced Portlon and a diameter-enlarged portion of said main bodY~ a threaded hole centrallY formed and axiallY
extending in an end surface of said diameter-reduced S, l; . ...
Portion to be engaged with a threaded end of the separator, tool recelvlng means formed in an end surface of said diameter-enlarged portion and an elastic water-swollen rubber cylinder put around said diameter-reduced Portion so that an outer Periphery Of said cYlinder Is tapered towards the end surface of said diameter-reduced Portion and an end surface of said cYlinder looking towards the end surface of said diameter-enlarged portion bears against said step of said main body while the end surface of sald cYlinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced Portion.
To assure that the end surface of said elastic water-swollen rubger cYlinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced Portion. said elastlc water-swollen rubber cYlinder maY
be so arranged that the end surface thereof looking towards the end surface of said diamter-reduced portion reduced Portion or coincides with said end surface of said diameter-reduced portion.
In the accompanying drawings:
Fig. 1 is a Partial longitudinal sectional view illustrating a device constructed in accordance with a 13~}`211~
first embodiment of the present lnvention;
Fig. 2 is a side view illustrating the same;
Fig. 3 is a disassembled perspectlve view illustratlng the same;
Fig. 4 is a longitudinal sectional view illustrating said device as filllng uP a recess left in a concrete wall after removal of a separator terminal;
Fig. 5 through 10 are Partial longitudinal sectional views illustrating other embodiments, wherein Fig. 5 illustrates a second embodiment, Fig. 6 illustrates a third embodiment, Fig. 7 illustrates a fourth embodiment, Fig. 8 illustrates a fifth embodiment, Flg. 9 illustrates a sixth embodiment and Fig. 10 illustrates a seventh embodiment;
Flg. Il Is a frontal view illustrating a device constructed in accordance with a eighth embodiment of the Present invention;
Fig. 12 is a side view illustrating the same; and Fig. 13 is a longitudinal sectlonal view illustratins said device as filling uP a recess left in a concrete wall after removal of a separator terminal.
The invention will be initiallY described with respect to the first embodiment as lllustrated bY Figs.
I through 4. A reference ~ designates a device for 13~Zll~
filling and a reference 1 deslgnates a main bodY of said device _ made of sYnthetic resin and shaped in a truncated counce. Said main body 1 has a steP 2 circumferentially formed around its outer periPhery~ bY
which said main body 1 is divided into a diameter-reduced Portion 3 and a diameter-enlarged Portion.
Said diameter-reduced Portion 3 is Provided centrallY
in its end surface with a threaded hole 6 while said diameter-enlarged Portion is provided in its end surface with tool recelving means 7 consisting of upper and lower holes. An elastic water-swollen rubber cYlindrical component 8 is rotatablY mounted on said dlameter-reduced Portion 3 of the main bodY 1. This cYlindrlcal component 8 includes a bottom plate having a central opening 10 and Peripheral edge 11 projecting axially forwards. After mounted on the main bodY 1.
said water-swollen rubber cYlindrical comPonent 8 has its bottom plate 9 bearing against the end surface of the diameter-reduced Portion 3. its end surface looking towards the end surface of the diameter-enlarged portion bearing against the steP 2 of the main bodY
and its outer cYlindrical surface slightlY proJecting radially outwards with respect to the main bodY 1, thus constituting the device 3 for filling uP of the invention. Said diameter-reduced Portion 3 of the main bodY 1 and said water-swollen rubber cYlindrical 13~2:~14 component 8 are, as shown. taPered towards the end surface of said diameter-reduced portion 3.
Examples of the water-swelling waterstoP material to be used for the water-swelling waterstoP rings 3. 7 and 15 include acrYl, vinyl and inorganic water-swelling resins. It is ParticularlY preferable to use a flexible material containing water-swelling Polyurethane which comprises a mixture of a water-swelling polYurethane resin and. for example, natural, synthetic or reclaimed rubber, therefor.
Such a flexible material as described above may be obtained bY kneading one or more PolYether polYols of the following general formula:
R[(OR)n]P
wherein R rePresents a PolYhydric alcohol residue; (OR) rePresents a polyoxyalkYlene chain comprising oxyalkylene srouPs each having an oxYethylene grouP and an alkYlene group carrYing three or four carbon atoms, provided that the content of the oxYethylene sroups amounts to 20 to 100X of the total molecular weight;
n is a number corresPondins to the degree of Polymerization of the oxYalkylene grouPs and giving a hYdroxyl group equivalent of 200 to 2500; and ~3~21~4 p is a number of 2 to 8. Preferably 2 to 4;
together with urthane polymer(s) having polYisocyanate gorups, a crosslinking agent and the rubber as defined above follwed bY curing.
Examples of said Polyhydrlc alcohol include dihYdric alcohols such as ethYlene glYcol and Propylene glycol; trihYdric alcohols such as glycerol and trimethylolpropane; tetrahYdric alcohols such as erythritol and PentaerYthritol; pentahydric alcohols such as arabitol and xYlitol; and hexahYdric alcohols such as sorbitol and mannitol.
Said PolYether PlYols may be obtalned by addlng alkylene oxlde(s) to these PolYhydric alcohols in such a manner as to give the desired molecular weight.
Either random or block addition maY be employed therefor. When the content of the oxyethYlene groups is less than 20X, the resulting material is unsatisfactory as a waterstoP material. AnY
polyisocyanates maY be employed. The content of the terminal isDcyanate srouPs may be 1 to 12X. prferablY 2 to 7X.
Examples of said crosslinking agent include polyols and Polyamines each carrYing two to six active hYdrosen atoms per molecule and has an average molecular weight per active hYdrogen atom of 30 to 15000, for examPle~ low-molecular weight polYols~
~3-~Z~ ~4 a~ddition polYmers of low-molecular weight polYols and alkylene oxides and addition polYmers of low-molecular weight polYamines and alkYlene oxides, as well as mixtures thereof.
It is preferable that the flexible material as described above contains 20 to 800 Parts of the water-swelling PolYurethane resin per 100 Parts of the rubber.
Other examPles of preferable flexible materials are those obtained bY further adding hYdraulic material(s) to a comPosition comPrising said water-swelling Polyurethane resin and rubber. Examples of available hYdraullc materials include Portland cement.
blast furnace cement. colloidal cement and gYpsum. It is preferable to employ a curing accelerator for cement comprising calcium aluminate simultaneously therewith.
A flexibile material comPrisins such a hydraulic material has an advantage that it shows little shrinkage when dried. It is preferable that the hYdraulic material is blended in an amount of 20 to 30 parts Per 100 Parts of the mixture of the water-swelling Polyurethane and rubber.
The above flexible material maY further contain appropriate water-absorbing material(s). ExamPles of the water-absorbing materials include those mainly comprising an d,~-unsaturated comPound~ which carries 13t~2114 - l o -one or more carboxyl groups or those caPable of being derived thereto such as carboxYl~ carboxYlate~
carboxylic limide. carboxYlic amide or carboxYlic anhydrlde srouPs Per molecule, and optionallY
Polymerized with other ~ unsaturated compound(s) and/or modified with isocYanate(s).
Examples of such a water-absorbing resin include conventional water-absorbing PolYmers such as starch/acrylic acid graft coPolYmer~ a salt of styrene/maleic anhYdride copolymer, crosslinked polY(sodium acrYlate)~ vinyl ester/ethYlenically unsaturated carboxylic acids. and saponified Products of derivatlves thereof.
The flexlble material maY be further vulcanized with the use of a crosslinking agent such as sulfur.
It is Preferable that the comPosition of the flexible material maY be controlled in such a manner as to g1ve a water-swelling ratio of the resulting molded article of 10 to 350 Y., still PreferablY 40 to 250 %.
Fig. 4 is a longitudinal sectional view illustrating said device as filling uP a recess left in a concrete wall after removal of a seParator terminal.
A reference 4 designates a seParator as embedded in a concrete wall 13. Said separator 4 is provided on its opposite ends with threads 5 terminating in stoppers 12. respectlvelY.
13~21i~
A reference 14 designates a recess whlch has been occupied bY the separator terminal havlng a head shaped 1n a truncated cone and left in the concrete wall 13 after removal of such seParator terminal.
It should be understood here that the expression "concrete wall" covers the walls of varlous concrete structures so far as theY are constructed wlth use of the separators.
Now it will be described how to use the device of the present invention.
After removal of the molds and the seParator terminals upon comPletion of the concrete wall 13 bY
placing concrete, the recesses are left in the concrete wall at positlons correspondlng to the resPective separator terminals. The device 3 of the present invention Is to fill uP each of these recesses 14. To achieve It, the device _ Is Inserted, with Its diameter-reduced portlon ahead, into the recess 14 so that the threaded hole 6 Is aligned contact with the threaded end of the separator 4, then a suitable tool is engaged in the tool receiving means 7 and therebY
the main bodY I is rotated so as to engage the threaded hole 6 thereof with the thread 5 of the separator 4.
In a consequence, as seen in Flg. 4, the main bodY I of the device a is threaded on the end of the seParator 4 and secured within the recess 14. The bottom Plate 9 13~tZ114 of the elastic water-swollen rubber cylindrical component 18 is tightlY Pressed along its pro~ecting edge 11 particularly against the bottom surface of the recess 14 as the main bodY 1 is threaded in whlle sald elastlc water-swollen rubber cylindr~cal comPonent 8 is compressed between the bottom surface of the recess 14 and the step 2 of the main bodY 1 and therebY radial 1Y
expanded so as to be Pressed agianst the Peripheral surfaces of both the recess 14 and the main body 1. In this manner. the device _ PerfectlY fills up the recess 14.
With a consequence, anY qUantitY of rainwater or like Penetrating thorugh the surface of the wall 13 into a gap defined between the recess 14 and the peripheral surface of the main bodY 1 of the device is dammed uP by the elastic water-swollen rubber cYlindrical comPonent 8 against further penetration into the wall 13.
More speclfically~ when anY quantitY of rainwater or like reaches said gap defined between the recess 14 and the Peripheral surface of the main bodY 1. said elastic water-swollen rubber cylindrical comPonent 8 is so swollen that the oPposite end surfaces thereof are pressed against the bottom surface of the recess 14 and the steP 2 of the main bodY 1. resPectively~ and thereby its axial swelling is Prevented. As a result, ~3(~211~
said elastic water-swollen rubber cylindrical comPonent 8 is now radially swollen tightly against the peripheral surfaces of both the recess 14 and the main body I and reliably fills up the gaP defined between the recess 14 and the device _, assisting the device _ to Prevent the quantity of water Present in said saP
from further penetrating into the wall 13.
Figs. 5 through lO illustrate other embodiments of said device a.
In the device al of Fig. 5 constructed as the second embodiment, the Projecting edge 11 formed on the bottom plate 9 of the elastic water-swollen rubber cYlindrical component 8 as the Part of the device a is replaced bY an annular rldge 111 extending along the perlpheral edge on the outer side of the bottom Plate 9.
The devlce a2 f Fig. 6 constructed as the third embodiment differs from the device al as the second embodiment in that said annular ridge 111 of the elastic water-swollen rubber cYlindrical comPonent 8 is disPosed~ instead of along the Peripheral edge. along a circle concentric with said Peripheral edge and having a radius smaller than that of said Peripheral edge on the outer side of the bottom Plate 9.
In the device a3 of Fig. 7 constructed as the fourth embodiment. the proiecting edge 11 formed on the 13~:114 bottom plate 9 of the elastic water-swollen rubber cYlindrical component 8 ls replaced bY a pluralitY of concentric annular ridges 112 each having a triangular cross-sectlon extending along the peripheral edge on the outer side of the bottom plate 9.
In the device a4 of Fig. 8 constructed as the fifth embodiment, the bottom Plate 9 of the elastic water-swollen rubber cYlindrical comPonent 8 is flat without the pro~ecting edge or like.
The device a5 of Fig. 9 constructed as the sixth embodiment differs from the device a4 as the fifth embodiment in that there is provided an annular ridge 113 on the diameter-reduced end surface of the main bodY 1 in said fifth embodiment.
The device a6 f Fig. 10 constructed as the seventh embodiment differs from the device a4 as the fifth embodiment in that the bottom plate 9 is removed from the elastic water-swollen rubber cYlindrical component 8 of said fifth embodiment and the diameter-reduced end of the cYlindrical component extends forwards beYond the diameter-reduced end surface of the main bodY I so as to form a proiection 114.
These devices a1. a2. a3, 4 5 6 constructed as the second through seventh embodiments function in the manner similar to the device _ as the first embodiment.
l;~5~2:1~ 4 With the above-mentioned devices a, al, a2. a3, a4. a5 and a6. the dlameter-reduced end surface of the elastic water-swollen rubber cYlindrical comPonent 8 can be pressed against the bottom surface of the recess in the annular line contact mode as the main bodY l of each device is threaded on the end 5 of the seParator 4. Owing to such annular line contact, the diameter-reduced end surface of the device can be tishtlY
pressed agianst the bottom surface of the recess 14 even when the main bodY I is rotated with a relativelY
small force.
The device a7 constructed in accordance with the eighth embodiment and illustrated bY Figs. 11 through 13 corresponds to the device 3 as the first embodiment in which the bottom Plate 9 Is removed from the elastic water-swollen rubber cYlindrical comPonent 8 so that the diameter-reduced end surface of said elastic water-swollen rubber cYlindrical component 8 coincides with the diameter-reduced end surface of the main bodY 1.
This eighth embodiment is identical to the first embodiment in its operation and effect. SpecificallY.
as seen in Fig. 13. the device a7 secured within the recess 14 bY threading the main body 1 on the end 5 of the separator 4 and the outer peripheral surface of the cylindrical comPonent 8 is Pressed against the inner peripheral surface of the recess 14 while the opPosite ~3~Z1~4 end surfaces there of are Pressed against the bottom surface of the recess 14 and the step 2 of the main bodY 1. respectivelY~ In this manner, the device a7 fllls uP the recess 14.
The device of the present invention for fillins uP
the recess left in the concrete wall after removal of the separator terminal provides significant effects as follow:
(I) The feature that the device is threaded on the end of the separator by a suitable tool assures reliable and firm installaiton thereof, preventing the device from be~ng disPlaced outwards and from fallins off.
(2) The water-swollen rubber cyllndrical component carried around the main bodY of the device is compressed between the bottom surface of the recess and the steP of the main bodY threaded on the end of the separator and therebY radiallY exPanded tightly asainst the Peripheral surfaces of both the recess and the main bodY .
Therefore:
(a) The water-swollen rubber cylindrical component is brought into contact with both the bottom surface and the periPheral surface of the recess over a sufficiently larse area to achieve a significant water-sealing effect by said cylindrical component.
13~Z~
(b) Any quantitY of rainwater or like penetrating through the wall surface into the gaP defined between the Perlpheral surfaces of the recess and the main bodY
is dammed uP bY the water-swollen rubber cylindrical component located outwardly of the main bodY against further penetration into the wall.
(c) When anY quantity of rainwater or like penetrating into the gaP between the periPheral surfaces of the recess and the main bodY reaches the water-swollen rubber cylindrical component, said cYlindrical component is swollen, pressed at the oPposite ends against the bottom surface of the recess and the step of the main bodY. resPectively~ and thereby prevented from being axlallY swollen. In consequence, the cYllndrical component is radiallY
swollen tightlY agianst the PeriPheral surfaces of both the recess and the main bodY over a sufficiently large area to achieve a reliable sealing and therebY to further assure that anY quantitY of water Present in the saP defined therebetween is Prevented from further penetrating into the wall.
A Principal ob~ect of the present invention is to provide a device for filling uP a recess left in the concrete wall after removal of the separator terminal with a high water-sealing effect and therebY to solve the above-mentioned Problems.
Another ob~ect of the presnt invention is to provide said device which can be constructed from relativelY few parts in a simPle structure, easilY
manufactured at a low cost and easilY maniPulated.
The present inventlon Provides a device for filling up a recess left in a concrete wall after removal of a separator terminal, said device comprislng a maln bodY
including a circumferential step formed around its outer Periphery at a longitudinal intermediate locatlon so that said clrcumferential steP defines a dlameter-reduced Portlon and a diameter-enlarged portion of said main bodY~ a threaded hole centrallY formed and axiallY
extending in an end surface of said diameter-reduced S, l; . ...
Portion to be engaged with a threaded end of the separator, tool recelvlng means formed in an end surface of said diameter-enlarged portion and an elastic water-swollen rubber cylinder put around said diameter-reduced Portion so that an outer Periphery Of said cYlinder Is tapered towards the end surface of said diameter-reduced Portion and an end surface of said cYlinder looking towards the end surface of said diameter-enlarged portion bears against said step of said main body while the end surface of sald cYlinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced Portion.
To assure that the end surface of said elastic water-swollen rubger cYlinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced Portion. said elastlc water-swollen rubber cYlinder maY
be so arranged that the end surface thereof looking towards the end surface of said diamter-reduced portion reduced Portion or coincides with said end surface of said diameter-reduced portion.
In the accompanying drawings:
Fig. 1 is a Partial longitudinal sectional view illustrating a device constructed in accordance with a 13~}`211~
first embodiment of the present lnvention;
Fig. 2 is a side view illustrating the same;
Fig. 3 is a disassembled perspectlve view illustratlng the same;
Fig. 4 is a longitudinal sectional view illustrating said device as filllng uP a recess left in a concrete wall after removal of a separator terminal;
Fig. 5 through 10 are Partial longitudinal sectional views illustrating other embodiments, wherein Fig. 5 illustrates a second embodiment, Fig. 6 illustrates a third embodiment, Fig. 7 illustrates a fourth embodiment, Fig. 8 illustrates a fifth embodiment, Flg. 9 illustrates a sixth embodiment and Fig. 10 illustrates a seventh embodiment;
Flg. Il Is a frontal view illustrating a device constructed in accordance with a eighth embodiment of the Present invention;
Fig. 12 is a side view illustrating the same; and Fig. 13 is a longitudinal sectlonal view illustratins said device as filling uP a recess left in a concrete wall after removal of a separator terminal.
The invention will be initiallY described with respect to the first embodiment as lllustrated bY Figs.
I through 4. A reference ~ designates a device for 13~Zll~
filling and a reference 1 deslgnates a main bodY of said device _ made of sYnthetic resin and shaped in a truncated counce. Said main body 1 has a steP 2 circumferentially formed around its outer periPhery~ bY
which said main body 1 is divided into a diameter-reduced Portion 3 and a diameter-enlarged Portion.
Said diameter-reduced Portion 3 is Provided centrallY
in its end surface with a threaded hole 6 while said diameter-enlarged Portion is provided in its end surface with tool recelving means 7 consisting of upper and lower holes. An elastic water-swollen rubber cYlindrical component 8 is rotatablY mounted on said dlameter-reduced Portion 3 of the main bodY 1. This cYlindrlcal component 8 includes a bottom plate having a central opening 10 and Peripheral edge 11 projecting axially forwards. After mounted on the main bodY 1.
said water-swollen rubber cYlindrical comPonent 8 has its bottom plate 9 bearing against the end surface of the diameter-reduced Portion 3. its end surface looking towards the end surface of the diameter-enlarged portion bearing against the steP 2 of the main bodY
and its outer cYlindrical surface slightlY proJecting radially outwards with respect to the main bodY 1, thus constituting the device 3 for filling uP of the invention. Said diameter-reduced Portion 3 of the main bodY 1 and said water-swollen rubber cYlindrical 13~2:~14 component 8 are, as shown. taPered towards the end surface of said diameter-reduced portion 3.
Examples of the water-swelling waterstoP material to be used for the water-swelling waterstoP rings 3. 7 and 15 include acrYl, vinyl and inorganic water-swelling resins. It is ParticularlY preferable to use a flexible material containing water-swelling Polyurethane which comprises a mixture of a water-swelling polYurethane resin and. for example, natural, synthetic or reclaimed rubber, therefor.
Such a flexible material as described above may be obtained bY kneading one or more PolYether polYols of the following general formula:
R[(OR)n]P
wherein R rePresents a PolYhydric alcohol residue; (OR) rePresents a polyoxyalkYlene chain comprising oxyalkylene srouPs each having an oxYethylene grouP and an alkYlene group carrYing three or four carbon atoms, provided that the content of the oxYethylene sroups amounts to 20 to 100X of the total molecular weight;
n is a number corresPondins to the degree of Polymerization of the oxYalkylene grouPs and giving a hYdroxyl group equivalent of 200 to 2500; and ~3~21~4 p is a number of 2 to 8. Preferably 2 to 4;
together with urthane polymer(s) having polYisocyanate gorups, a crosslinking agent and the rubber as defined above follwed bY curing.
Examples of said Polyhydrlc alcohol include dihYdric alcohols such as ethYlene glYcol and Propylene glycol; trihYdric alcohols such as glycerol and trimethylolpropane; tetrahYdric alcohols such as erythritol and PentaerYthritol; pentahydric alcohols such as arabitol and xYlitol; and hexahYdric alcohols such as sorbitol and mannitol.
Said PolYether PlYols may be obtalned by addlng alkylene oxlde(s) to these PolYhydric alcohols in such a manner as to give the desired molecular weight.
Either random or block addition maY be employed therefor. When the content of the oxyethYlene groups is less than 20X, the resulting material is unsatisfactory as a waterstoP material. AnY
polyisocyanates maY be employed. The content of the terminal isDcyanate srouPs may be 1 to 12X. prferablY 2 to 7X.
Examples of said crosslinking agent include polyols and Polyamines each carrYing two to six active hYdrosen atoms per molecule and has an average molecular weight per active hYdrogen atom of 30 to 15000, for examPle~ low-molecular weight polYols~
~3-~Z~ ~4 a~ddition polYmers of low-molecular weight polYols and alkylene oxides and addition polYmers of low-molecular weight polYamines and alkYlene oxides, as well as mixtures thereof.
It is preferable that the flexible material as described above contains 20 to 800 Parts of the water-swelling PolYurethane resin per 100 Parts of the rubber.
Other examPles of preferable flexible materials are those obtained bY further adding hYdraulic material(s) to a comPosition comPrising said water-swelling Polyurethane resin and rubber. Examples of available hYdraullc materials include Portland cement.
blast furnace cement. colloidal cement and gYpsum. It is preferable to employ a curing accelerator for cement comprising calcium aluminate simultaneously therewith.
A flexibile material comPrisins such a hydraulic material has an advantage that it shows little shrinkage when dried. It is preferable that the hYdraulic material is blended in an amount of 20 to 30 parts Per 100 Parts of the mixture of the water-swelling Polyurethane and rubber.
The above flexible material maY further contain appropriate water-absorbing material(s). ExamPles of the water-absorbing materials include those mainly comprising an d,~-unsaturated comPound~ which carries 13t~2114 - l o -one or more carboxyl groups or those caPable of being derived thereto such as carboxYl~ carboxYlate~
carboxylic limide. carboxYlic amide or carboxYlic anhydrlde srouPs Per molecule, and optionallY
Polymerized with other ~ unsaturated compound(s) and/or modified with isocYanate(s).
Examples of such a water-absorbing resin include conventional water-absorbing PolYmers such as starch/acrylic acid graft coPolYmer~ a salt of styrene/maleic anhYdride copolymer, crosslinked polY(sodium acrYlate)~ vinyl ester/ethYlenically unsaturated carboxylic acids. and saponified Products of derivatlves thereof.
The flexlble material maY be further vulcanized with the use of a crosslinking agent such as sulfur.
It is Preferable that the comPosition of the flexible material maY be controlled in such a manner as to g1ve a water-swelling ratio of the resulting molded article of 10 to 350 Y., still PreferablY 40 to 250 %.
Fig. 4 is a longitudinal sectional view illustrating said device as filling uP a recess left in a concrete wall after removal of a seParator terminal.
A reference 4 designates a seParator as embedded in a concrete wall 13. Said separator 4 is provided on its opposite ends with threads 5 terminating in stoppers 12. respectlvelY.
13~21i~
A reference 14 designates a recess whlch has been occupied bY the separator terminal havlng a head shaped 1n a truncated cone and left in the concrete wall 13 after removal of such seParator terminal.
It should be understood here that the expression "concrete wall" covers the walls of varlous concrete structures so far as theY are constructed wlth use of the separators.
Now it will be described how to use the device of the present invention.
After removal of the molds and the seParator terminals upon comPletion of the concrete wall 13 bY
placing concrete, the recesses are left in the concrete wall at positlons correspondlng to the resPective separator terminals. The device 3 of the present invention Is to fill uP each of these recesses 14. To achieve It, the device _ Is Inserted, with Its diameter-reduced portlon ahead, into the recess 14 so that the threaded hole 6 Is aligned contact with the threaded end of the separator 4, then a suitable tool is engaged in the tool receiving means 7 and therebY
the main bodY I is rotated so as to engage the threaded hole 6 thereof with the thread 5 of the separator 4.
In a consequence, as seen in Flg. 4, the main bodY I of the device a is threaded on the end of the seParator 4 and secured within the recess 14. The bottom Plate 9 13~tZ114 of the elastic water-swollen rubber cylindrical component 18 is tightlY Pressed along its pro~ecting edge 11 particularly against the bottom surface of the recess 14 as the main bodY 1 is threaded in whlle sald elastlc water-swollen rubber cylindr~cal comPonent 8 is compressed between the bottom surface of the recess 14 and the step 2 of the main bodY 1 and therebY radial 1Y
expanded so as to be Pressed agianst the Peripheral surfaces of both the recess 14 and the main body 1. In this manner. the device _ PerfectlY fills up the recess 14.
With a consequence, anY qUantitY of rainwater or like Penetrating thorugh the surface of the wall 13 into a gap defined between the recess 14 and the peripheral surface of the main bodY 1 of the device is dammed uP by the elastic water-swollen rubber cYlindrical comPonent 8 against further penetration into the wall 13.
More speclfically~ when anY quantitY of rainwater or like reaches said gap defined between the recess 14 and the Peripheral surface of the main bodY 1. said elastic water-swollen rubber cylindrical comPonent 8 is so swollen that the oPposite end surfaces thereof are pressed against the bottom surface of the recess 14 and the steP 2 of the main bodY 1. resPectively~ and thereby its axial swelling is Prevented. As a result, ~3(~211~
said elastic water-swollen rubber cylindrical comPonent 8 is now radially swollen tightly against the peripheral surfaces of both the recess 14 and the main body I and reliably fills up the gaP defined between the recess 14 and the device _, assisting the device _ to Prevent the quantity of water Present in said saP
from further penetrating into the wall 13.
Figs. 5 through lO illustrate other embodiments of said device a.
In the device al of Fig. 5 constructed as the second embodiment, the Projecting edge 11 formed on the bottom plate 9 of the elastic water-swollen rubber cYlindrical component 8 as the Part of the device a is replaced bY an annular rldge 111 extending along the perlpheral edge on the outer side of the bottom Plate 9.
The devlce a2 f Fig. 6 constructed as the third embodiment differs from the device al as the second embodiment in that said annular ridge 111 of the elastic water-swollen rubber cYlindrical comPonent 8 is disPosed~ instead of along the Peripheral edge. along a circle concentric with said Peripheral edge and having a radius smaller than that of said Peripheral edge on the outer side of the bottom Plate 9.
In the device a3 of Fig. 7 constructed as the fourth embodiment. the proiecting edge 11 formed on the 13~:114 bottom plate 9 of the elastic water-swollen rubber cYlindrical component 8 ls replaced bY a pluralitY of concentric annular ridges 112 each having a triangular cross-sectlon extending along the peripheral edge on the outer side of the bottom plate 9.
In the device a4 of Fig. 8 constructed as the fifth embodiment, the bottom Plate 9 of the elastic water-swollen rubber cYlindrical comPonent 8 is flat without the pro~ecting edge or like.
The device a5 of Fig. 9 constructed as the sixth embodiment differs from the device a4 as the fifth embodiment in that there is provided an annular ridge 113 on the diameter-reduced end surface of the main bodY 1 in said fifth embodiment.
The device a6 f Fig. 10 constructed as the seventh embodiment differs from the device a4 as the fifth embodiment in that the bottom plate 9 is removed from the elastic water-swollen rubber cYlindrical component 8 of said fifth embodiment and the diameter-reduced end of the cYlindrical component extends forwards beYond the diameter-reduced end surface of the main bodY I so as to form a proiection 114.
These devices a1. a2. a3, 4 5 6 constructed as the second through seventh embodiments function in the manner similar to the device _ as the first embodiment.
l;~5~2:1~ 4 With the above-mentioned devices a, al, a2. a3, a4. a5 and a6. the dlameter-reduced end surface of the elastic water-swollen rubber cYlindrical comPonent 8 can be pressed against the bottom surface of the recess in the annular line contact mode as the main bodY l of each device is threaded on the end 5 of the seParator 4. Owing to such annular line contact, the diameter-reduced end surface of the device can be tishtlY
pressed agianst the bottom surface of the recess 14 even when the main bodY I is rotated with a relativelY
small force.
The device a7 constructed in accordance with the eighth embodiment and illustrated bY Figs. 11 through 13 corresponds to the device 3 as the first embodiment in which the bottom Plate 9 Is removed from the elastic water-swollen rubber cYlindrical comPonent 8 so that the diameter-reduced end surface of said elastic water-swollen rubber cYlindrical component 8 coincides with the diameter-reduced end surface of the main bodY 1.
This eighth embodiment is identical to the first embodiment in its operation and effect. SpecificallY.
as seen in Fig. 13. the device a7 secured within the recess 14 bY threading the main body 1 on the end 5 of the separator 4 and the outer peripheral surface of the cylindrical comPonent 8 is Pressed against the inner peripheral surface of the recess 14 while the opPosite ~3~Z1~4 end surfaces there of are Pressed against the bottom surface of the recess 14 and the step 2 of the main bodY 1. respectivelY~ In this manner, the device a7 fllls uP the recess 14.
The device of the present invention for fillins uP
the recess left in the concrete wall after removal of the separator terminal provides significant effects as follow:
(I) The feature that the device is threaded on the end of the separator by a suitable tool assures reliable and firm installaiton thereof, preventing the device from be~ng disPlaced outwards and from fallins off.
(2) The water-swollen rubber cyllndrical component carried around the main bodY of the device is compressed between the bottom surface of the recess and the steP of the main bodY threaded on the end of the separator and therebY radiallY exPanded tightly asainst the Peripheral surfaces of both the recess and the main bodY .
Therefore:
(a) The water-swollen rubber cylindrical component is brought into contact with both the bottom surface and the periPheral surface of the recess over a sufficiently larse area to achieve a significant water-sealing effect by said cylindrical component.
13~Z~
(b) Any quantitY of rainwater or like penetrating through the wall surface into the gaP defined between the Perlpheral surfaces of the recess and the main bodY
is dammed uP bY the water-swollen rubber cylindrical component located outwardly of the main bodY against further penetration into the wall.
(c) When anY quantity of rainwater or like penetrating into the gaP between the periPheral surfaces of the recess and the main bodY reaches the water-swollen rubber cylindrical component, said cYlindrical component is swollen, pressed at the oPposite ends against the bottom surface of the recess and the step of the main bodY. resPectively~ and thereby prevented from being axlallY swollen. In consequence, the cYllndrical component is radiallY
swollen tightlY agianst the PeriPheral surfaces of both the recess and the main bodY over a sufficiently large area to achieve a reliable sealing and therebY to further assure that anY quantitY of water Present in the saP defined therebetween is Prevented from further penetrating into the wall.
(3) With the water-swollen rubber cYllndrical component so arranged that the one end bears against the steP of the main bodY and the other end extends beyond the diameter-reduced end surface of said main body when mounted around said maln bodY of the device, 13~21~4 the water-s~ollen rubber cYlindrical component is compressed between the bottom surface of the recess and the steP of the main bodY as said maln bodY of the device is threaded on the end of the separator. Thus.
the cYlindrical comPonent is axiallY compressed and thereby forciblY exPanded in the radial direction futher tightlY against the periPheral surfaces of both the recess and the main bodY.
the cYlindrical comPonent is axiallY compressed and thereby forciblY exPanded in the radial direction futher tightlY against the periPheral surfaces of both the recess and the main bodY.
(4) It ls effectivelY avoided by the invention that rainwater or like penetrates through the wall surface. then through the gap defined between the recess and the device into the wall around the separator. Therefore:
(a) The separator is prevented from being rusted and thereby the durabilitY of the concrete structure is improved.
(b) It is also effectivelY avoided that anY
quantity of rust containing water exudes over the wall surface and injures the aesthetic appearance of the wall surface.
(c) RelativelY small number of parts can be easily assembled at a low cost into the device whlch can be. in turn. easilY handled.
(a) The separator is prevented from being rusted and thereby the durabilitY of the concrete structure is improved.
(b) It is also effectivelY avoided that anY
quantity of rust containing water exudes over the wall surface and injures the aesthetic appearance of the wall surface.
(c) RelativelY small number of parts can be easily assembled at a low cost into the device whlch can be. in turn. easilY handled.
Claims (3)
1. A device for filling up a recess left in a concrete wall after removal of a separator terminal. said device comprising a main body including a circumferential step formed around its outer periphery at a longitudinal intermediate location so that said circumferential step defines a diameter-reduced portion and a diameter-enlarged portion of said main body, a threaded hole centrally formed and axially extending in an end surface of said diameter-reduced portion to be engaged with a threaded end of the separator, tool receiving means formed in an end surface of said diameter-enlarged protion and an elastic water-swollen rubber cylinder put around said diameter-reduced portion so that an outer periphery of said cylinder is tapered towards the end surface of said diameter-reduced portion and an end surface of said cylinder looking towards the end surface of said diameter-enlarged portion bears against said step of said main body while the end surface of said cylinder looking towards the end surface of said diameter-reduced portion extends at least to said end surface of said diameter-reduced portion.
2. A device for filling up a recess left in a concrete wall after removal of a separator terminal as recited in Claim 1. wherein the end surface of the water-swollen rubber cylinder looking towards the end surface of the diameter-reduced portion extends beyond said end surface of said diameter-reduced portion of the main body.
3. A device for filling up a recess left in a concrete wall after removal of a separator terminal as recited in Claim 1, wherein the end surface of the water-swollen rubber cylinder looking towards the end surface of the diameter-reduced Portion coincides with said end surface of said diameter-reduced Portion of the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000563891A CA1302114C (en) | 1988-04-12 | 1988-04-12 | Device for filling up of recess left in concrete wall after removal of separator terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000563891A CA1302114C (en) | 1988-04-12 | 1988-04-12 | Device for filling up of recess left in concrete wall after removal of separator terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1302114C true CA1302114C (en) | 1992-06-02 |
Family
ID=4137813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000563891A Expired - Lifetime CA1302114C (en) | 1988-04-12 | 1988-04-12 | Device for filling up of recess left in concrete wall after removal of separator terminal |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1302114C (en) |
-
1988
- 1988-04-12 CA CA000563891A patent/CA1302114C/en not_active Expired - Lifetime
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