CA1085641A - Joint device for poles - Google Patents
Joint device for polesInfo
- Publication number
- CA1085641A CA1085641A CA293,960A CA293960A CA1085641A CA 1085641 A CA1085641 A CA 1085641A CA 293960 A CA293960 A CA 293960A CA 1085641 A CA1085641 A CA 1085641A
- Authority
- CA
- Canada
- Prior art keywords
- pole
- elements
- male
- female
- female elements
- 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
Links
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000008602 contraction Effects 0.000 claims 1
- 239000011379 limecrete Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/16—Prestressed structures
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A joint device for poles including a flanged joint means that are united to the end of the pole by means of male and female elements; the female elements are sunk in the pole and have one end opened to the outside and the opposite end connected to metal bars of the pole cage; the male elements are inserted in the flanges.
A joint device for poles including a flanged joint means that are united to the end of the pole by means of male and female elements; the female elements are sunk in the pole and have one end opened to the outside and the opposite end connected to metal bars of the pole cage; the male elements are inserted in the flanges.
Description
085~
The subject matter of the present invention is a joint device for poles in lime concrete or in similar or assimilable material.
The invention specifically relates to a joint device preferably for precompressed poles in lime concrete utilising flange means which are fixed to the extremities of the poles by bolting means, where the nuts of the bolts are sunk in the pole and the screw inserted in the Flange and then screwed into the nuts.
It is known not to be possible to obtain precompressed lime concrete poles of great length for technological reasons, handling and transport difficulties. It has become necessary therefore to use various jointing devices so as to be able to obtain poles of desired lengths.
The joint devices used at present make substantial use of flange means which are welded to the metal bars of the cage prior to casting and partially sunk into the lime concrete casting.
; These known devices cause various inconveniences and disadvantages; the more apparent and important among them is the fact that even before the formation of the pole itself, its : destination and the way it will be employed - whether singularly or with others - must be foreseen.
The second disadvantaging inconvenience is the excessive working required for welding the flanges.
One other inconvenience is the changes in the mechanical properties of the metal cage bars of the pole due to the localized heat treatment which is a by-product of welding the flange.
One further disadvantage is the difficulties encountered in storing and handling the poles due to the presence of flanges s~
normally protruding peripherically from the ends of the poles.
These inconven;ences and d;sadvantages are practically overcome by the present invention which presents also various other advantages and merits.
According to the invention, the joint device for poles in lime concrete is preferably precompressed and is substantially of an assembly of male-female union elements, such as bolts, whose female parts are sunk in the lime concrete and are distributed regularly in the end section of the poles, with their opening turned to the outside and their internal part fixed to the metal bars of the cage of the pole. The flange is then fixed to the pole end by means of male elements cooperating in turn with the female elements.
Since the device presented in this disclosure has one part of it (female element) sunk in the pole which will be only utilized when the pole is jointed to others, it is not necessary to foresee the poles' destination in advance. Furthermore, the female elements, being sunk in the pole, do not cause any inconvenience when these poles are being handled, they allow not only the jointing of one pole to another but also to other means such as a support plate or clamps for pretensioning the metal bars of the cage.
The present invention as a conquence offers the advantage that the poles can be made independently of their utilization or the female elements are used in connection with pretensioning clamps.
These merits and advantages together with others that will result from the present description are achieved by the invention in providing a joint device for poles preferably pre-compressed in lime concrete or in similar or assimilable material, having flanged joint means characterized by the fact ~- - 2 -~- ~ O ~ S 6 the flange means are united to the end of the pole by male-female union elements, the female elements being sunk in the pole with their opening turned to the nutside and the bottom is fixed to the metal bars of the cage of the pole and the male element is suitable for insertion in the flange means, uniting itself to the relative female element.
A description of one preferential embodiment of the invention will be given with the help of the attached drawings, in which:
Figure 1 illustrates a perspective view of the end of a pole made according to the present inventioni Figure 2 illustrates an exploded view of male-female union element used in the invention of Fig. 1, Figure 3 illustrates in a longitudinal sectional view the application of the device, according to the invention, in jointing two poles;
Figure 4 illustrates in as axial sectional view the application of device~ subject of this invention, in jointing a pole to a basement.
In the drawing similar parts or parts with similar functions bear the same reference.
Referring to Figs. 1 to 4, 10 is generally the pole in this case precompressed and in lime concrete although it could be in other similar or assimilable material, in whose end 11 are sunk the female elements 13 of the union element 12, female elements 13 being disposed symmetrically around the centreline of the pole. In this case there are eight female elements. Female element 13 has its opening 15 towards the outside and fixed at its bottom end 16 to the metal element or metal bar 17 of the cage of pole 10; in the case illustrated herein, the union element 12 consists of a bolt whose nut ~01~564~L
constitutes the female element 13; the nut is hollow and have a first threaded part 18 and a tighter part 19 nearer the bottom end 16 forming this way a collar seat 20, the diameter of part 19 is larger than the diameter of the bar 17 but smaller than the diameter of the head 27 of bar 17, 21 is a flange having a first circle of holes 22 disposed relative to the female elements 13 present at the end section 11 of the pole 10 and having the seats 23 for the head of the male elements 14, and a second external circle of holes 25 within which are inserted the uniting means 26 of flanges 21 which are bolts in the case illustrated in Fig. 3, and screws 28 in that of Flg. ~, 30 is a support plate anchored by means of screw 28 and nuts 29 to the pole 10.
In the preparation of pole metal cages, longitudinal bars 17 are used, they carry at their ends female elements 13.
The female elements 13 receive, in the non-threaded part 19, ; bar 17 whose head 27 occupies the threaded part 18 near part 19, ' resting on the internal collar seat 20 present at the mouth of ~ part or hole 19 of female elements 13. The metal cage is made, ; ~ 20 care should be taken to regularly distribute the bars 17 carrying t~ the female elements in the circumferential sense, clamping means ~ are fixed on the female elements 13 by means of male elements 14.
i,~ The tensioning of the metal bars is then affected by .~; the clamping means and the casting of the lime concrete is done.
When the casting is completed and the reaction occurred, the clamps are removed which causes the metal bars to contract ~` putting the lime concrete in compression, this is helped by the presence of the female elements 13 which function in this case, G
with their bottom end 16, as compression rings. The pole thus ~: 30 is shown in Fig. 1.
The pole can be used either singularly as in Fig. 1 or ~ - 4 -~1~8S~4~
jointed to another pole as in Fig. 3.
For this purpose, the flange 21 is secured to the end section 11 of the pole by means of the male elements 14, which are inserted in the first circle of holes 22 of flange 21 and screwed into the female elements 13 embe~d in the pole, heads of the male elements are housed in the seat 23 of holes 22.
Fixed to the end of poles 10 and 10', the flanges 21 are then united to each other by means of bolts 26 accomplishing thus the jointing of poles 10 and 10'.
In a similar manner it is possible, with reference to Fig. 4, to unite support plate 30 to the flange 21 fixed to the pole lO, which is provided with screw 2~ for that purpose; the screws inserted in flange 21 can then be secured by nuts 29.
One preferential embodiment of the invention has been described although an expert in the art can envisage many variants without going beyond the ambit of the inventive concept presented herein. Thus, it is possible to change the measure-ments and dimensions of the various parts. ~;
- It is also possible to weld the female elements to the end 27 of the bars 17.
j ~ It is further possible to use expanders for male elements of use pins as locking means.
It is possible too to affect the reciprocal union of t'.l the flanges 21 by means of welding.
These and other are variants possible ~or an expert in the art without going beyond the ambit of the inventive concept presented herein.
.
The subject matter of the present invention is a joint device for poles in lime concrete or in similar or assimilable material.
The invention specifically relates to a joint device preferably for precompressed poles in lime concrete utilising flange means which are fixed to the extremities of the poles by bolting means, where the nuts of the bolts are sunk in the pole and the screw inserted in the Flange and then screwed into the nuts.
It is known not to be possible to obtain precompressed lime concrete poles of great length for technological reasons, handling and transport difficulties. It has become necessary therefore to use various jointing devices so as to be able to obtain poles of desired lengths.
The joint devices used at present make substantial use of flange means which are welded to the metal bars of the cage prior to casting and partially sunk into the lime concrete casting.
; These known devices cause various inconveniences and disadvantages; the more apparent and important among them is the fact that even before the formation of the pole itself, its : destination and the way it will be employed - whether singularly or with others - must be foreseen.
The second disadvantaging inconvenience is the excessive working required for welding the flanges.
One other inconvenience is the changes in the mechanical properties of the metal cage bars of the pole due to the localized heat treatment which is a by-product of welding the flange.
One further disadvantage is the difficulties encountered in storing and handling the poles due to the presence of flanges s~
normally protruding peripherically from the ends of the poles.
These inconven;ences and d;sadvantages are practically overcome by the present invention which presents also various other advantages and merits.
According to the invention, the joint device for poles in lime concrete is preferably precompressed and is substantially of an assembly of male-female union elements, such as bolts, whose female parts are sunk in the lime concrete and are distributed regularly in the end section of the poles, with their opening turned to the outside and their internal part fixed to the metal bars of the cage of the pole. The flange is then fixed to the pole end by means of male elements cooperating in turn with the female elements.
Since the device presented in this disclosure has one part of it (female element) sunk in the pole which will be only utilized when the pole is jointed to others, it is not necessary to foresee the poles' destination in advance. Furthermore, the female elements, being sunk in the pole, do not cause any inconvenience when these poles are being handled, they allow not only the jointing of one pole to another but also to other means such as a support plate or clamps for pretensioning the metal bars of the cage.
The present invention as a conquence offers the advantage that the poles can be made independently of their utilization or the female elements are used in connection with pretensioning clamps.
These merits and advantages together with others that will result from the present description are achieved by the invention in providing a joint device for poles preferably pre-compressed in lime concrete or in similar or assimilable material, having flanged joint means characterized by the fact ~- - 2 -~- ~ O ~ S 6 the flange means are united to the end of the pole by male-female union elements, the female elements being sunk in the pole with their opening turned to the nutside and the bottom is fixed to the metal bars of the cage of the pole and the male element is suitable for insertion in the flange means, uniting itself to the relative female element.
A description of one preferential embodiment of the invention will be given with the help of the attached drawings, in which:
Figure 1 illustrates a perspective view of the end of a pole made according to the present inventioni Figure 2 illustrates an exploded view of male-female union element used in the invention of Fig. 1, Figure 3 illustrates in a longitudinal sectional view the application of the device, according to the invention, in jointing two poles;
Figure 4 illustrates in as axial sectional view the application of device~ subject of this invention, in jointing a pole to a basement.
In the drawing similar parts or parts with similar functions bear the same reference.
Referring to Figs. 1 to 4, 10 is generally the pole in this case precompressed and in lime concrete although it could be in other similar or assimilable material, in whose end 11 are sunk the female elements 13 of the union element 12, female elements 13 being disposed symmetrically around the centreline of the pole. In this case there are eight female elements. Female element 13 has its opening 15 towards the outside and fixed at its bottom end 16 to the metal element or metal bar 17 of the cage of pole 10; in the case illustrated herein, the union element 12 consists of a bolt whose nut ~01~564~L
constitutes the female element 13; the nut is hollow and have a first threaded part 18 and a tighter part 19 nearer the bottom end 16 forming this way a collar seat 20, the diameter of part 19 is larger than the diameter of the bar 17 but smaller than the diameter of the head 27 of bar 17, 21 is a flange having a first circle of holes 22 disposed relative to the female elements 13 present at the end section 11 of the pole 10 and having the seats 23 for the head of the male elements 14, and a second external circle of holes 25 within which are inserted the uniting means 26 of flanges 21 which are bolts in the case illustrated in Fig. 3, and screws 28 in that of Flg. ~, 30 is a support plate anchored by means of screw 28 and nuts 29 to the pole 10.
In the preparation of pole metal cages, longitudinal bars 17 are used, they carry at their ends female elements 13.
The female elements 13 receive, in the non-threaded part 19, ; bar 17 whose head 27 occupies the threaded part 18 near part 19, ' resting on the internal collar seat 20 present at the mouth of ~ part or hole 19 of female elements 13. The metal cage is made, ; ~ 20 care should be taken to regularly distribute the bars 17 carrying t~ the female elements in the circumferential sense, clamping means ~ are fixed on the female elements 13 by means of male elements 14.
i,~ The tensioning of the metal bars is then affected by .~; the clamping means and the casting of the lime concrete is done.
When the casting is completed and the reaction occurred, the clamps are removed which causes the metal bars to contract ~` putting the lime concrete in compression, this is helped by the presence of the female elements 13 which function in this case, G
with their bottom end 16, as compression rings. The pole thus ~: 30 is shown in Fig. 1.
The pole can be used either singularly as in Fig. 1 or ~ - 4 -~1~8S~4~
jointed to another pole as in Fig. 3.
For this purpose, the flange 21 is secured to the end section 11 of the pole by means of the male elements 14, which are inserted in the first circle of holes 22 of flange 21 and screwed into the female elements 13 embe~d in the pole, heads of the male elements are housed in the seat 23 of holes 22.
Fixed to the end of poles 10 and 10', the flanges 21 are then united to each other by means of bolts 26 accomplishing thus the jointing of poles 10 and 10'.
In a similar manner it is possible, with reference to Fig. 4, to unite support plate 30 to the flange 21 fixed to the pole lO, which is provided with screw 2~ for that purpose; the screws inserted in flange 21 can then be secured by nuts 29.
One preferential embodiment of the invention has been described although an expert in the art can envisage many variants without going beyond the ambit of the inventive concept presented herein. Thus, it is possible to change the measure-ments and dimensions of the various parts. ~;
- It is also possible to weld the female elements to the end 27 of the bars 17.
j ~ It is further possible to use expanders for male elements of use pins as locking means.
It is possible too to affect the reciprocal union of t'.l the flanges 21 by means of welding.
These and other are variants possible ~or an expert in the art without going beyond the ambit of the inventive concept presented herein.
.
Claims (7)
1. A pole made of precompressed concrete comprising:
an elongate body having opposite ends; a cage inside said body formed of metal bars embedded in said concrete, joint means at least at one end of said body, said joint means including male and female elements, each said female element being sunk at said one end of said body and having one end opened and one opposite bottom end connected to said metal bars; each said male element being engaged in said female elements through said opened end, said male elements being adapted to engage removable pretensioning flange means associated with said pole during concrete casting of said pole, said female elements remaining embedded in said pole after concrete casting to prevent contraction of said metal bars and to allow joining of said pole to other structures.
an elongate body having opposite ends; a cage inside said body formed of metal bars embedded in said concrete, joint means at least at one end of said body, said joint means including male and female elements, each said female element being sunk at said one end of said body and having one end opened and one opposite bottom end connected to said metal bars; each said male element being engaged in said female elements through said opened end, said male elements being adapted to engage removable pretensioning flange means associated with said pole during concrete casting of said pole, said female elements remaining embedded in said pole after concrete casting to prevent contraction of said metal bars and to allow joining of said pole to other structures.
2. A pole as defined in Claim 1, wherein said female elements each include at said bottom end, a hole which enlarges internally to form a collar seat receiving one end of said metal bar.
3. A pole as defined in Claim 1 or 2, wherein said female elements are symmetrically disposed relative to a center line extending through said pole.
4. A pole as defined in Claim 1 or 2, wherein said male elements are threadedly engaged in said female elements.
5. A pole as defined in Claim 1 or 2, wherein said male elements are fixed to said female elements by means of pins.
6. A pole as defined in Claim 1 or 2, wherein said male elements are fixed to said female elements by means of adhesive.
7. A pole as defined in Claim 1 or 2, wherein said male elements are fixed to said female elements by expanding said male elements into said female elements.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT83509A/76 | 1976-12-30 | ||
| IT8350976A IT1070374B (en) | 1976-12-30 | 1976-12-30 | JUNCTION DEVICE FOR CONCRETE POLES OR SIMILAR, SIMILAR OR SIMILAR MATERIALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1085641A true CA1085641A (en) | 1980-09-16 |
Family
ID=11322712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA293,960A Expired CA1085641A (en) | 1976-12-30 | 1977-12-28 | Joint device for poles |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1085641A (en) |
| DE (1) | DE2756594A1 (en) |
| IT (1) | IT1070374B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2628779B1 (en) * | 1988-03-16 | 1993-11-05 | Bepre | METHOD OF ASSEMBLING CONSTITUENT ELEMENTS OF PRE-STRESSED CONCRETE AND POSTS FOR POWER TRANSMISSION LINES, OBTAINED BY THIS PROCESS |
| CN111576984B (en) * | 2020-05-12 | 2021-08-20 | 福建龙岩方圆水泥制品有限公司 | Manufacturing process of electric pole with strong stability |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT181734B (en) * | 1953-07-16 | 1955-04-25 | Rudolf Dipl Ing Dr Techn Knotz | Installation on reinforced concrete bodies such as mast parts |
| DE1695629U (en) * | 1955-01-31 | 1955-03-31 | Trox Gmbh Geb | PIPE BODY ASSEMBLED FROM MULTIPLE REINFORCED CONCRETE PIPES. |
| US3382680A (en) * | 1965-09-21 | 1968-05-14 | Nippon Concrete Ind Co Ltd | Prestressed concrete pile sections |
| ZA721940B (en) * | 1972-02-22 | 1972-12-27 | Stabilator Ab | A locking joint for concrete piles comprising joined sections |
-
1976
- 1976-12-30 IT IT8350976A patent/IT1070374B/en active
-
1977
- 1977-12-19 DE DE19772756594 patent/DE2756594A1/en not_active Withdrawn
- 1977-12-28 CA CA293,960A patent/CA1085641A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2756594A1 (en) | 1978-07-13 |
| IT1070374B (en) | 1985-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |