CA1100104A - Material for fixing anchor bolt or like and method of manufacturing same - Google Patents
Material for fixing anchor bolt or like and method of manufacturing sameInfo
- Publication number
- CA1100104A CA1100104A CA330,110A CA330110A CA1100104A CA 1100104 A CA1100104 A CA 1100104A CA 330110 A CA330110 A CA 330110A CA 1100104 A CA1100104 A CA 1100104A
- Authority
- CA
- Canada
- Prior art keywords
- aggregates
- tubular structure
- members
- hardener
- filled
- 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
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Abstract
ABSTRACT OF THE DISCLOSURE
A device for fixing an anchor bolt or the like, which is used, in case of inserting and planting an anchor bolt in a plant-ing hole bored in a concrete foundation or base rock, for filling the gap between the planting hole and the anchor bolt to couple them both, in which paste-like base material and hardener for cold-setting resin requiring hardener are filled separately in long glass tubes together with artificial solid ball-like aggre-gates, and a plurality of pairs of them are arranged in a hollow tubular structure and adhered mutually with adhesive. The ends of the tubes are sealed and secured with end caps.
A device for fixing an anchor bolt or the like, which is used, in case of inserting and planting an anchor bolt in a plant-ing hole bored in a concrete foundation or base rock, for filling the gap between the planting hole and the anchor bolt to couple them both, in which paste-like base material and hardener for cold-setting resin requiring hardener are filled separately in long glass tubes together with artificial solid ball-like aggre-gates, and a plurality of pairs of them are arranged in a hollow tubular structure and adhered mutually with adhesive. The ends of the tubes are sealed and secured with end caps.
Description
This invention relates to a device used, in case o~
boring a hole in a concrete foundation, base rock or the like and insertiny and fixing a rod-like member such as an anchor bolt or modified reinforcing steel in the hole, for filling the gap between the hole and the rod-like member to join them both, which is com-posed to be advantageous when cold-setting rasin with hardener and aggregate are used in the work spot. A method of manufacturing the same is also disclosed.
As a fixing device of this kind according to the prior art, as shown in Japanese registered utility model No. 982,593 (Utility ~lodel Publication No. 47-2249), known is a fixing device for a planted bolt, comprising a glass tube filled with viscous resin and a suitable amount of granular stone aggregate intermixed therein and also with a small thin glass tube containing hardener for said resin, and sealed with a cap at its opening. This device is inserted in a loose hole ~or an anchor bolt, for example, and a rotating anchor bolt held by a chuck of an electric drill is in-serted therein, thereby crushing the glass tubes and stirring -them, and the anchor bolt is then fixed by leaving it in position and awaiting curing of the resin.
such a fixing device is remarkably convenient in oper-ation as compared with those fixing devices such as cement and mortar which have beenfilled between the anchor bolt hole and the anchor bolt since olden times. The main advantages are that the planting hole boring operatlon is easy as the diameter of the hole may be small and the anchor bolt can be inserted and fixed to the bottom of a rather deep planting hole. Even with such convenient fixing devices, howevex, there are some problems to be solved.
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Particularly, the ~irst problem is a larye variance in ~ixing strength a~ter applicationO This results from the use o~ natural stone aggregate such as quartz sand and powdered crystal. The second problem is that it is difficult to adjust the size of the fixing device at the work spot. This second problem can be solved in due course by preparing glass tubes differing in length at suitable steps and using them individually or in suitable combin-ation as occasion demands. In this case, however, another problem o~ increased cos-t will be caused by the increased classes of glass tube length.
An object of this invention is to provide a device for fixing an anchor bolt or the like, which properly solves these first and second problems, and a method of manufacturing the same.
The device for fixing an anchor bolt or the like accord-ing to this invention comprises a plurality of pairs of first and second members, the first member including a crushable tube, such as a glass tube or a hard plastic tube, containing artificial solid ball-like aggregates, such as ceramic balls, and paste-like base material of cold-setting resin requiring hardener, and the second 2Q member including a similar tube containing similar artificial solid ball-like aggregates and paste-like hard0ner for the above base material, said pairs being combined into a tubular structure having an outer diameter which permits insertion in a predetermined hole for the anchor bolt or the llke, and the first and second members being joined at their contact portions and in the vicinities there-of. It is some-times preferable to fill the internal cavity o~
the tubular structure with artificial solid ball-like aggregates and to join together with the above first and second members at the .
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` ' contact portions and in the vicinities thereof.
In the present fixing device, the aggregate particles are substantially uniform in strength and the variance of ~ixing strength after application is very small, as artificial solid balls are used as the aggregate. Moreover, this fixing device is available in any length wherever it is used, by snapping off after forming a file cut, for example. That is, the size of the fixing device can be adjusted arbitrarily at the work spot. According to the structure of the present fixing device, the crushable tubes such as ~lass tubes are arranged in tubular fashion, so that a part of each tube is exposed to the outside to permit access of a cutting tool such as file to the tube at the time of cutting. As the base material and the hardener of the resin are in the form of paste, they hardly flow out either at the time of cutting or at the time of application, especially to a side wall and a ceiling wall, there-by improving working efficiency. Furthermore, as the artificial aggregates are ball-shaped, the operation for filling them in a thin glass tube together with paste-like resin without leaving substantial space can be carried out relatively easily as compared 2n with the case where the aggregates have indefinite shapes. For example, when the paste-like resin is forced or sucked into a glass tube filled previously with ball-like aggregates, the resul-tant flow resistance is low and the remaining space becomes small.
The reason for filling the internal cavity of the tubular structure wlth aggregates is that it is more economical to use more aggre-gates so long as the fixing property is not redwced. The reason why the aggregates in the interior cavity of the tubular structure are ball-shaped is that each joining portion becomes nearly a point .. ..
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': ;' : . . .' ' ' . . ' .,, '' ' and easy separation can ~e ef~ected at the joining portion at the time of cutting. Moreover, the mutual adhesion couplings between the first and second members or between these members and the aggregates filled in the tubular structure result in a stable shape of the fixing device so that it can be cut into arbitrary length.
The method of manufacturing the device for fixing an anchor bolt or the like according to this invention is character-ized by the steps of combining a plurality of pairs of first and second members into tubular shape, the first member comprising a crushable tube such as a glass tube or a hard plastic tube filled with artificial solid ball-like ag~regates and paste-like base material of cold-setting resin requiring hardener and the second member comprising a tube similar to the above tube with artificial solid ball-like aggreyates and paste-like hardener for the base material, putting caps on the both ends of the tubular structure, the each cap having a depression for fitting on the respective -ends of the tubes to close their internal cavities and a through-hole for connecting the internal cavity of the tubular structure to the outside, dipping it in uncured liquid adhesive having relatively low viscosity, pulling it up and draining to cure. In case of manufacturing the tubular structure filled with aggregates, the through-hole of the cap is provided with a geometry permitti.ng no passage of the smallest particle of the aggregates.
The caps used in this method serve to prevent intermixing of the adhesive with the paste like base material and hardener in the tubes forming the first and second members, at the same time, to position the first and second members forming the tubular structure for adhering Lhem in a manner that the~ are arranged along ~ .
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a cylindrical surface so that they can be inserted in a predeter-mined hole of the anchor bolt or the like and, when the tubular structure is filled with aggregates, to prevent escape of the aggregates. The through-hole formed in the cap facilitates flow of the adhesive in and out so that the first and second members, and the aggregates in the tubular structure if any, are mutually adhered at their contact portions and in the vicinities thereof.
No trouble will occur if the caps are removed after the adhesive cures, as the respective components have joined into one body.
However, the paste-like base material and hardener may flow out slowly in such case as storage for a long time, and it is preferable to leave the caps as they are in order to avoid sucll trouble.
Thus, in accordance with one broad aspect of the invention, there is provided a device for fixing an anchor bolt or the like, comprising a plurality of pairs of first and second members having crushable tube envelopes, respectively, and being arranged along a cylindrical surface to form a tubular structure having a central cavit~, the envelope of said first member being filled with artlficial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener, the enve-lope of said second member being filled with artificial solid ball-like aggregates and paste-like hardener for said resin, said first and second members being adhered mutually with adhesive, and the outer diameters of said members being selected to adapt the outer diameter of said tubular structure for a predetermined planting hole, said device having end caps to close said mernbers and hold them aligned with said c~vlindrical surface.
In accordance with another broad aspect o~ the invention .~ .
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there .i5 provided a method of manufacturing a device for fixing an anchor bolt or the like, comprising the steps of preparing first and second members, said first member including a crushable tubular envelope filled with artificial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener and said second member including a similar envelope filled with similar aggregates and paste-like hardener for said resin, com-bining a plurality of pairs of said first and second members to forr.l a tubular structure having a central cavity, putting caps on both ends of said tubular structure, each said cap having a depression for fitting on the ends of said envelopes to close the inner cavities of said envelopes, and a through-hole for connecting said central cavity of said tubular structure to the outside, dipping the assembly in liquid uncured adhesive, and pulling it up to harden the remaining adhesive.
The invention will now be further described in conjunction with the accompanying drawings, in which:
: Figure l is a front view of a first embodiment of the fixing device of this invention having its longitudinal intermediate portion omitted;
Figure 2 is a plan view of the em~odim nt of Figure l;
Figure 3 is a sectional view along line A-A of Figure 2;
Figure 4 is a front view o-f a second embodiment of this invention having its longitudinal intermediate portion omitted;
;~ Figure 5 is a plan view of the embodiment of Figure ~;
Figure 6 is a sectional view along line s-B of Figure ~;
and Figure 7 is a longitudinal sectional front view ,~
.
representing the fixing device and caps in an intermediate step of the manufacturing process of the fixing device of the second embodiment.
Some embodiments will be explained with re~erence to the drawings for the purpose of description of the invention in more detail.
I~ Eigures 1 to 3 representing the first embodiment, glass tubes 1 and 2 are identical ampoule glass tubes having length Ll of 500 millimeters, outer diameter dl of 6 millimeters and thick-ness of 0.5 millimeter. The fixing device includes two pairs ofthe glass tubes 1 and 2 which are arranged alternately so as to adjoin along the inner surface of a predetermined cylinder, and the adjoining ones are adhered at their contact portions and in the vicinities thereof to form a tubular structure (having a small internal cavity in this case). Ceramic balls 3 having diameter of
boring a hole in a concrete foundation, base rock or the like and insertiny and fixing a rod-like member such as an anchor bolt or modified reinforcing steel in the hole, for filling the gap between the hole and the rod-like member to join them both, which is com-posed to be advantageous when cold-setting rasin with hardener and aggregate are used in the work spot. A method of manufacturing the same is also disclosed.
As a fixing device of this kind according to the prior art, as shown in Japanese registered utility model No. 982,593 (Utility ~lodel Publication No. 47-2249), known is a fixing device for a planted bolt, comprising a glass tube filled with viscous resin and a suitable amount of granular stone aggregate intermixed therein and also with a small thin glass tube containing hardener for said resin, and sealed with a cap at its opening. This device is inserted in a loose hole ~or an anchor bolt, for example, and a rotating anchor bolt held by a chuck of an electric drill is in-serted therein, thereby crushing the glass tubes and stirring -them, and the anchor bolt is then fixed by leaving it in position and awaiting curing of the resin.
such a fixing device is remarkably convenient in oper-ation as compared with those fixing devices such as cement and mortar which have beenfilled between the anchor bolt hole and the anchor bolt since olden times. The main advantages are that the planting hole boring operatlon is easy as the diameter of the hole may be small and the anchor bolt can be inserted and fixed to the bottom of a rather deep planting hole. Even with such convenient fixing devices, howevex, there are some problems to be solved.
.
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,: ,:
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.
. .
Particularly, the ~irst problem is a larye variance in ~ixing strength a~ter applicationO This results from the use o~ natural stone aggregate such as quartz sand and powdered crystal. The second problem is that it is difficult to adjust the size of the fixing device at the work spot. This second problem can be solved in due course by preparing glass tubes differing in length at suitable steps and using them individually or in suitable combin-ation as occasion demands. In this case, however, another problem o~ increased cos-t will be caused by the increased classes of glass tube length.
An object of this invention is to provide a device for fixing an anchor bolt or the like, which properly solves these first and second problems, and a method of manufacturing the same.
The device for fixing an anchor bolt or the like accord-ing to this invention comprises a plurality of pairs of first and second members, the first member including a crushable tube, such as a glass tube or a hard plastic tube, containing artificial solid ball-like aggregates, such as ceramic balls, and paste-like base material of cold-setting resin requiring hardener, and the second 2Q member including a similar tube containing similar artificial solid ball-like aggregates and paste-like hard0ner for the above base material, said pairs being combined into a tubular structure having an outer diameter which permits insertion in a predetermined hole for the anchor bolt or the llke, and the first and second members being joined at their contact portions and in the vicinities there-of. It is some-times preferable to fill the internal cavity o~
the tubular structure with artificial solid ball-like aggregates and to join together with the above first and second members at the .
-........ ' ' ' , :
` ' contact portions and in the vicinities thereof.
In the present fixing device, the aggregate particles are substantially uniform in strength and the variance of ~ixing strength after application is very small, as artificial solid balls are used as the aggregate. Moreover, this fixing device is available in any length wherever it is used, by snapping off after forming a file cut, for example. That is, the size of the fixing device can be adjusted arbitrarily at the work spot. According to the structure of the present fixing device, the crushable tubes such as ~lass tubes are arranged in tubular fashion, so that a part of each tube is exposed to the outside to permit access of a cutting tool such as file to the tube at the time of cutting. As the base material and the hardener of the resin are in the form of paste, they hardly flow out either at the time of cutting or at the time of application, especially to a side wall and a ceiling wall, there-by improving working efficiency. Furthermore, as the artificial aggregates are ball-shaped, the operation for filling them in a thin glass tube together with paste-like resin without leaving substantial space can be carried out relatively easily as compared 2n with the case where the aggregates have indefinite shapes. For example, when the paste-like resin is forced or sucked into a glass tube filled previously with ball-like aggregates, the resul-tant flow resistance is low and the remaining space becomes small.
The reason for filling the internal cavity of the tubular structure wlth aggregates is that it is more economical to use more aggre-gates so long as the fixing property is not redwced. The reason why the aggregates in the interior cavity of the tubular structure are ball-shaped is that each joining portion becomes nearly a point .. ..
.
.
,, . ~ .. , :
.. . ..
': ;' : . . .' ' ' . . ' .,, '' ' and easy separation can ~e ef~ected at the joining portion at the time of cutting. Moreover, the mutual adhesion couplings between the first and second members or between these members and the aggregates filled in the tubular structure result in a stable shape of the fixing device so that it can be cut into arbitrary length.
The method of manufacturing the device for fixing an anchor bolt or the like according to this invention is character-ized by the steps of combining a plurality of pairs of first and second members into tubular shape, the first member comprising a crushable tube such as a glass tube or a hard plastic tube filled with artificial solid ball-like ag~regates and paste-like base material of cold-setting resin requiring hardener and the second member comprising a tube similar to the above tube with artificial solid ball-like aggreyates and paste-like hardener for the base material, putting caps on the both ends of the tubular structure, the each cap having a depression for fitting on the respective -ends of the tubes to close their internal cavities and a through-hole for connecting the internal cavity of the tubular structure to the outside, dipping it in uncured liquid adhesive having relatively low viscosity, pulling it up and draining to cure. In case of manufacturing the tubular structure filled with aggregates, the through-hole of the cap is provided with a geometry permitti.ng no passage of the smallest particle of the aggregates.
The caps used in this method serve to prevent intermixing of the adhesive with the paste like base material and hardener in the tubes forming the first and second members, at the same time, to position the first and second members forming the tubular structure for adhering Lhem in a manner that the~ are arranged along ~ .
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a cylindrical surface so that they can be inserted in a predeter-mined hole of the anchor bolt or the like and, when the tubular structure is filled with aggregates, to prevent escape of the aggregates. The through-hole formed in the cap facilitates flow of the adhesive in and out so that the first and second members, and the aggregates in the tubular structure if any, are mutually adhered at their contact portions and in the vicinities thereof.
No trouble will occur if the caps are removed after the adhesive cures, as the respective components have joined into one body.
However, the paste-like base material and hardener may flow out slowly in such case as storage for a long time, and it is preferable to leave the caps as they are in order to avoid sucll trouble.
Thus, in accordance with one broad aspect of the invention, there is provided a device for fixing an anchor bolt or the like, comprising a plurality of pairs of first and second members having crushable tube envelopes, respectively, and being arranged along a cylindrical surface to form a tubular structure having a central cavit~, the envelope of said first member being filled with artlficial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener, the enve-lope of said second member being filled with artificial solid ball-like aggregates and paste-like hardener for said resin, said first and second members being adhered mutually with adhesive, and the outer diameters of said members being selected to adapt the outer diameter of said tubular structure for a predetermined planting hole, said device having end caps to close said mernbers and hold them aligned with said c~vlindrical surface.
In accordance with another broad aspect o~ the invention .~ .
.. ' , ' , ., , ,, ~ , .
there .i5 provided a method of manufacturing a device for fixing an anchor bolt or the like, comprising the steps of preparing first and second members, said first member including a crushable tubular envelope filled with artificial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener and said second member including a similar envelope filled with similar aggregates and paste-like hardener for said resin, com-bining a plurality of pairs of said first and second members to forr.l a tubular structure having a central cavity, putting caps on both ends of said tubular structure, each said cap having a depression for fitting on the ends of said envelopes to close the inner cavities of said envelopes, and a through-hole for connecting said central cavity of said tubular structure to the outside, dipping the assembly in liquid uncured adhesive, and pulling it up to harden the remaining adhesive.
The invention will now be further described in conjunction with the accompanying drawings, in which:
: Figure l is a front view of a first embodiment of the fixing device of this invention having its longitudinal intermediate portion omitted;
Figure 2 is a plan view of the em~odim nt of Figure l;
Figure 3 is a sectional view along line A-A of Figure 2;
Figure 4 is a front view o-f a second embodiment of this invention having its longitudinal intermediate portion omitted;
;~ Figure 5 is a plan view of the embodiment of Figure ~;
Figure 6 is a sectional view along line s-B of Figure ~;
and Figure 7 is a longitudinal sectional front view ,~
.
representing the fixing device and caps in an intermediate step of the manufacturing process of the fixing device of the second embodiment.
Some embodiments will be explained with re~erence to the drawings for the purpose of description of the invention in more detail.
I~ Eigures 1 to 3 representing the first embodiment, glass tubes 1 and 2 are identical ampoule glass tubes having length Ll of 500 millimeters, outer diameter dl of 6 millimeters and thick-ness of 0.5 millimeter. The fixing device includes two pairs ofthe glass tubes 1 and 2 which are arranged alternately so as to adjoin along the inner surface of a predetermined cylinder, and the adjoining ones are adhered at their contact portions and in the vicinities thereof to form a tubular structure (having a small internal cavity in this case). Ceramic balls 3 having diameter of
2.7 to 3.3 millimeters are filled (as many as possible) in the tubes 1 and 2, paste-like bisphenol-A type epoxy resin (base material) 4 is filled in the remaining room in the tube 1 and paste-like polyamine (hardener) 5 is filled in the remaining room in the tube 2.
In Figures ~ to 6 representing a second embodiment which differs from the above, glass tubes 11 and 12 are identical ampoule glass tubes having length L2 of 500 millimetersl outer diameter d2 of 8 millimeters and thickness of 0.5 millimeter. The fixing device includes three pairs of the glass tubes 11 and 12 which are arranged alternately so as to adjoin along the inner surface of a predetermined cylinder, and the adjoining ones are adhered at their contact portions and in the vicinities thereof to form a tubular .
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structure. Ceramic balls 13 having diameter of 4 to 5 millimeters are filled ~as many as possible) in the tubes 11 and 12, paste-like bisphenol-A type epoxy resin (base material) 14 is filled in the remaining room in the tube 11 and paste-like polyamine (hardener) 15 is filled in the remaining room in the tube 12. The interior cavity of the tubular structure formed with the tubes 11 and 12 is also filled with ceramic balls 16 having a diameter of 4 to 5 milli-meters.
The fixing device of the second embodiment, for example, is manufactured as follows. Glass tubes 11 and 12 are first filled with ceramic balls 13 and held at one end with a suitable ~ig so as to allow the internal air to flow out but not to allow the ceramic balls 13 to get out, and the abovementioned paste-like base material and hardener are forced respectively therein from the other end by use of a grease gun, thereby preparing the first and second members individually.
As shown in Figure 7, three pairs of the glass tubes 11 (first members) and the glass tubes 12 (second members) are bundled with caps 20 and 21 into a tubular structure. In this case, the interior cavity of the tubular structure Eormed with the tubes 11 and 12 is filled with ceramic balls 16. The cap 20 is a molded product of polyethylene and has a depression for fitting on -the ends of the tubes 11 and 12 which are held in a positional relation-ship as shown in Figure 5, to close the interior cavities of the tubes 11 and 12, a through-hole 22 for connecting the interior cavity of the tuhular structure formed with the tubes 11 and 12 to the outside and a supporting tab 2~ having a supporting hole 23 at the upper porti~n~ The cap 21 has the structure of cap 20 from ~, .
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, which the supporting tab 2~ is removed.
After attaching the caps, -the whole assembly is hung by the supporting hole 23 and, using a hook conveyor/ for example, dipped in uncured liquid adhesive. Then it is pulled up and kept as it is until the adhesive cures. During this time, excessive adhesive in the tubular structure flows out from the connectiny hole 22 and adhesion is effected at and near the contact portions.
What is shown as the first embodiment is manufactured also in substantially the same manner as the above. Particularly, caps consistent with the outer diameter and the number of glass tubes to be used are prepared and first and second members made in the same manner are combined and processed with adhesive, leaving the interior cavity of the tubular structure vacant.
The adhesive for use is preferably synthetic resin adhes-ive such as polyvinyl acetate or polyurethane, or water glass, but it is not critical so long as it has relatively low viscosity, enables adhesion between the respective glass tubes or between the glass tubes and aggregates in the tubular structure, and becomes hard when it cures.
After the adhesive cures, the products are stored or transported to the work spots with the caps as attached. The caps may be removed just before use.
As an example of use of the first embodiment, description will be made in conjunction with the case in which a modified relnforcing steel (SD30 of Japanese Industrial Standard) of 16 millimeter diameter is fixed in a concrete foundation. First of all, a planting hole of l9 millimeter diameter and 130 millimeter depth is bored in the concrete foundation and its interior _g_ . _ : . - - ~ . , - .. . : . . . .. : .. ,.:
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is cleaned with a vacuum cleaner. The ~ixing device of the first embodiment is snapped off at a length of 130 millimeters by forming file cuts in the tubes 1 and 2 and inserted in the planting hole.
From the top side thereof, the modified reinforcing steel held by a hammer drill is inserted with rotation into the bottom o~ the hole and excess material forced out o~ the hole is removed. The whole is left as it is to harden the resin. The modi~ied rein-forcing steel has a length of 550 millimeters and male screw threads 100 millimeter long on the outside end for a pull~out test.
Twenty-eight (28) pieces of modified reinforcing steel which were same as the above were fixed in the same concr~te foundation in the same manner and a pull-out test was carried out after 72 hours by holding their screw portions. In the result, twenty-three (23) pieces were broken off at 4.18 to 4.27 tons and the remaining five (5) pieces were pulled out due to breakage at the boundary between the resin and concrete but exhibited 6 to 7 percent elongation.
As an example of use of the second embodiment, description will be made in conjunction with the case wherein a bolt of 25 millimeter diameter and 500 millimeter long, having threads over the whole length, (Japanese Industrial Standard material: SS41) is fixed in a concrete foundation. Similarly to the above, a planting hole of 29 millimeter diameter and 250 millimeter depth is bored in the concrete foundation, its interior is cleaned, a fixing device of the second embodiment is snapped off at a length of 250 millimeters by forming ~ile cuts and inserted in the planting hole, ` the bolt is held by a hammer drill and inserted with rotation, the material ~orced out from the hole is removed and the whole is left -.
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, , as it is.
While twenty pieces of the above bolts were fixed in the same concrete foundation in the same manner and subjected to a pull-out test after 72 hours, all of them were broken at 18.9 to 20.0 tons at portions outside the planting holes.
While ceramic balls were used as the artificial solid ball-like aggregates in the above embodiments, glass balls may be pre-ferable alternate aggregates in view of their uniformity of strength.
The paste-like bisphenol A type epoxy resin and polyamine hardener as used in the above embodiments may be a product of Sumitomo Chemical Industries sold by Nippon Jikkou K.K. on the tradename "Anchor Putty", while other synthetic resins and hardeners having similar properties to the above can also be used.
Further, while a hexagonal combination of three pairs of first and second members was disclosed as a tubular structure con-taining aggregates in the above embodiment, two, four and five pairs may be considered as occasion demands. However, consider-ation must be made on such a point that the amount of resin for bondlng the aggregates will become insufficient as compared with the amount of aggregates if the internal cavity of the tubular structure becomes excessively large.
POSSIBILITY OF INDUSTRIAL UTILIZATION
As described above, a device for fixing an anchor bolt or the like according to this invention is effectively utilized in fixing anchor bolts in a concrete foundation for setting up machine tools and other various equipments, in planting similar bolts in side walls and ceiling walls and in fixing anchor bolts or modified reinforcing steels which are to be inserted rather deeply in an ~ ~ . . , ,... ,......... .' .
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arbitrary direction in construction of a tunnel or the like.
Moreover, the method of manufacturing a device for fixing an anchor bolt or the like is effective from the point of view of mass production of the fixing devices.
. ~ '
In Figures ~ to 6 representing a second embodiment which differs from the above, glass tubes 11 and 12 are identical ampoule glass tubes having length L2 of 500 millimetersl outer diameter d2 of 8 millimeters and thickness of 0.5 millimeter. The fixing device includes three pairs of the glass tubes 11 and 12 which are arranged alternately so as to adjoin along the inner surface of a predetermined cylinder, and the adjoining ones are adhered at their contact portions and in the vicinities thereof to form a tubular .
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, - - -:
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, ~ : , .
structure. Ceramic balls 13 having diameter of 4 to 5 millimeters are filled ~as many as possible) in the tubes 11 and 12, paste-like bisphenol-A type epoxy resin (base material) 14 is filled in the remaining room in the tube 11 and paste-like polyamine (hardener) 15 is filled in the remaining room in the tube 12. The interior cavity of the tubular structure formed with the tubes 11 and 12 is also filled with ceramic balls 16 having a diameter of 4 to 5 milli-meters.
The fixing device of the second embodiment, for example, is manufactured as follows. Glass tubes 11 and 12 are first filled with ceramic balls 13 and held at one end with a suitable ~ig so as to allow the internal air to flow out but not to allow the ceramic balls 13 to get out, and the abovementioned paste-like base material and hardener are forced respectively therein from the other end by use of a grease gun, thereby preparing the first and second members individually.
As shown in Figure 7, three pairs of the glass tubes 11 (first members) and the glass tubes 12 (second members) are bundled with caps 20 and 21 into a tubular structure. In this case, the interior cavity of the tubular structure Eormed with the tubes 11 and 12 is filled with ceramic balls 16. The cap 20 is a molded product of polyethylene and has a depression for fitting on -the ends of the tubes 11 and 12 which are held in a positional relation-ship as shown in Figure 5, to close the interior cavities of the tubes 11 and 12, a through-hole 22 for connecting the interior cavity of the tuhular structure formed with the tubes 11 and 12 to the outside and a supporting tab 2~ having a supporting hole 23 at the upper porti~n~ The cap 21 has the structure of cap 20 from ~, .
' ' . , ' ' ' ,,: . ' .
, which the supporting tab 2~ is removed.
After attaching the caps, -the whole assembly is hung by the supporting hole 23 and, using a hook conveyor/ for example, dipped in uncured liquid adhesive. Then it is pulled up and kept as it is until the adhesive cures. During this time, excessive adhesive in the tubular structure flows out from the connectiny hole 22 and adhesion is effected at and near the contact portions.
What is shown as the first embodiment is manufactured also in substantially the same manner as the above. Particularly, caps consistent with the outer diameter and the number of glass tubes to be used are prepared and first and second members made in the same manner are combined and processed with adhesive, leaving the interior cavity of the tubular structure vacant.
The adhesive for use is preferably synthetic resin adhes-ive such as polyvinyl acetate or polyurethane, or water glass, but it is not critical so long as it has relatively low viscosity, enables adhesion between the respective glass tubes or between the glass tubes and aggregates in the tubular structure, and becomes hard when it cures.
After the adhesive cures, the products are stored or transported to the work spots with the caps as attached. The caps may be removed just before use.
As an example of use of the first embodiment, description will be made in conjunction with the case in which a modified relnforcing steel (SD30 of Japanese Industrial Standard) of 16 millimeter diameter is fixed in a concrete foundation. First of all, a planting hole of l9 millimeter diameter and 130 millimeter depth is bored in the concrete foundation and its interior _g_ . _ : . - - ~ . , - .. . : . . . .. : .. ,.:
. . ..
.; , . . .
: , . . : . , . , . . - .. - . .. .
. '. . : .:
:.
is cleaned with a vacuum cleaner. The ~ixing device of the first embodiment is snapped off at a length of 130 millimeters by forming file cuts in the tubes 1 and 2 and inserted in the planting hole.
From the top side thereof, the modified reinforcing steel held by a hammer drill is inserted with rotation into the bottom o~ the hole and excess material forced out o~ the hole is removed. The whole is left as it is to harden the resin. The modi~ied rein-forcing steel has a length of 550 millimeters and male screw threads 100 millimeter long on the outside end for a pull~out test.
Twenty-eight (28) pieces of modified reinforcing steel which were same as the above were fixed in the same concr~te foundation in the same manner and a pull-out test was carried out after 72 hours by holding their screw portions. In the result, twenty-three (23) pieces were broken off at 4.18 to 4.27 tons and the remaining five (5) pieces were pulled out due to breakage at the boundary between the resin and concrete but exhibited 6 to 7 percent elongation.
As an example of use of the second embodiment, description will be made in conjunction with the case wherein a bolt of 25 millimeter diameter and 500 millimeter long, having threads over the whole length, (Japanese Industrial Standard material: SS41) is fixed in a concrete foundation. Similarly to the above, a planting hole of 29 millimeter diameter and 250 millimeter depth is bored in the concrete foundation, its interior is cleaned, a fixing device of the second embodiment is snapped off at a length of 250 millimeters by forming ~ile cuts and inserted in the planting hole, ` the bolt is held by a hammer drill and inserted with rotation, the material ~orced out from the hole is removed and the whole is left -.
~ , , , ':
"
, , as it is.
While twenty pieces of the above bolts were fixed in the same concrete foundation in the same manner and subjected to a pull-out test after 72 hours, all of them were broken at 18.9 to 20.0 tons at portions outside the planting holes.
While ceramic balls were used as the artificial solid ball-like aggregates in the above embodiments, glass balls may be pre-ferable alternate aggregates in view of their uniformity of strength.
The paste-like bisphenol A type epoxy resin and polyamine hardener as used in the above embodiments may be a product of Sumitomo Chemical Industries sold by Nippon Jikkou K.K. on the tradename "Anchor Putty", while other synthetic resins and hardeners having similar properties to the above can also be used.
Further, while a hexagonal combination of three pairs of first and second members was disclosed as a tubular structure con-taining aggregates in the above embodiment, two, four and five pairs may be considered as occasion demands. However, consider-ation must be made on such a point that the amount of resin for bondlng the aggregates will become insufficient as compared with the amount of aggregates if the internal cavity of the tubular structure becomes excessively large.
POSSIBILITY OF INDUSTRIAL UTILIZATION
As described above, a device for fixing an anchor bolt or the like according to this invention is effectively utilized in fixing anchor bolts in a concrete foundation for setting up machine tools and other various equipments, in planting similar bolts in side walls and ceiling walls and in fixing anchor bolts or modified reinforcing steels which are to be inserted rather deeply in an ~ ~ . . , ,... ,......... .' .
. . . ~ , .
:
- : - " ~ . . . .
,. . .
. . .
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.
arbitrary direction in construction of a tunnel or the like.
Moreover, the method of manufacturing a device for fixing an anchor bolt or the like is effective from the point of view of mass production of the fixing devices.
. ~ '
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for fixing an anchor bolt or the like, compris-ing a plurality of pairs of first and second members having crushable tube envelopes, respectively, and being arranged along a cylindrical surface to form a tubular structure having a central cavity, the envelope of said first member being filled with arti-ficial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener, the envelope of said second member being filled with artificial solid ball-like aggregates and paste-like hardener for said resin, said first and second members being adhered mutually with adhesive, and the outer diameters of said members being selected to adapt the outer diameter of said tubular structure for a predetermined planting hole, said device having end caps to close said members and hold them aligned with said cylindrical surface.
2. A device according to claim 1, characterized in that said central cavity of said tubular structure is filled with artificial solid ball-like aggregates and the particles of said aggregates are adhered mutually and with said first and second members with adhesive.
3. A device according to claim 1 or 2, characterized in that said tube envelopes are glass tubes.
4. A device according to claim 1 or 2, characterized in that said tube envelopes are hard plastic tubes.
5. A device according to claim 1 or 2, characterized in that said artificial solid ball-like aggregates are ceramic balls.
6. A device according to claim 1 or 2, characterized in that said artificial solid ball-like aggregates are glass balls.
7. A device according to claim 1 or 2, characterized in that said cold-setting resin is bisphenol-A type epoxy resin, and said hardener is polyamine.
8. A method of manufacturing a device for fixing an anchor bolt or the like, comprising the steps of preparing first and second members, said first member including a crushable tubular envelope filled with artificial solid ball-like aggregates and paste-like base material of cold-setting resin requiring hardener and said second member including a similar envelope filled with similar aggregates and paste-like hardener for said resin, com-bining a plurality of pairs of said first and second members to form a tubular structure having a central cavity, putting-caps on both ends of said tubular structure, each said cap having a depression for fitting on the ends of said envelopes to close the inner cavities of said envelopes, and a through-hole for connecting said central cavity of said tubular structure to the outside, dipping the assembly in liquid uncured adhesive, and pulling it up to harden the remaining adhesive.
9. A method according to claim 8, characterized in that, prior to putting on said caps, artificial solid ball-like aggregates are filled in said central cavity of said tubular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA330,110A CA1100104A (en) | 1979-06-19 | 1979-06-19 | Material for fixing anchor bolt or like and method of manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA330,110A CA1100104A (en) | 1979-06-19 | 1979-06-19 | Material for fixing anchor bolt or like and method of manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1100104A true CA1100104A (en) | 1981-04-28 |
Family
ID=4114489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA330,110A Expired CA1100104A (en) | 1979-06-19 | 1979-06-19 | Material for fixing anchor bolt or like and method of manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1100104A (en) |
-
1979
- 1979-06-19 CA CA330,110A patent/CA1100104A/en not_active Expired
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