WO1998033997A1

WO1998033997A1 - Anchoring device for elongated member, e.g. telegraph pole

Info

Publication number: WO1998033997A1
Application number: PCT/SE1998/000125
Authority: WO
Inventors: Bertil Granlund
Original assignee: Bertil Granlund
Priority date: 1997-02-04
Filing date: 1998-01-29
Publication date: 1998-08-06
Also published as: SE9700377D0; SE9700377L; SE511092C2

Abstract

An anchoring device (1) for a telegraph pole or similar is designed as an elongated unit (2, 3). At one end (4) the unit has a part (4a) that is subjected to downward driving force in order to make possible the downward driving of the unit into the ground during a first stage of the anchoring process. The device (1) has a number of elongated elements or arms (10, 11, 12, 13) each of which during the first stage of the anchoring process occupies a position principally inside the unit. The elongated elements are designed so that by means of a force (F) applied via the above mentioned part (4a) they are pushed out completely or partially from the unit in directions (20, 21, 22, 23) that are different to the direction of the longitudinal axis (8) of the unit, all with the aim of increasing the anchoring capability by means of interaction between the arms and the ground.

Description

TITLE

Anchoring device for elongated member, e.g. telegraph pole .

TECHNICAL FIELD

The present invention relates to an anchoring device for elongated members, for example poles. Examples of these are telegraph poles and/or lampposts. The anchoring device is designed as an elongate unit that at one end has a part that is subjected to downward driving force in order to make possible the downward driving of the unit into the ground during a first stage of the anchoring process.

PRIOR ART

Various types of anchoring units for poles are already known. There is also a known method of anchoring telegraph poles in soft ground by first digging a hole in the ground and then casting a concrete foundation to which the pole is anchored. The demands on the anchoring unit are great with regard to its anchoring ability.

DESCRIPTION OF THE INVENTION

TECHNICAL PROBLEM

There is a need for technically simply constructed and from an anchoring point of view technically well- functioning anchoring devices. These must be able to work in relatively soft ground as well as in clay and/or sandy soil. This invention is intended to solve this problem among other things.

The anchoring principle must be simple inasmuch as the anchoring unit must be able to be driven into the ground using a conventional pile driver. The anchoring device must be of a relatively moderate length in order to be easy to handle and easy to store. The invention also solves this problem.

According to the invention, the anchoring device must be able to operate with an anchoring process comprising at least two stages where the device or unit as such is driven downwards into the ground in a first stage and thereafter an additional anchoring capability is implemented in a second stage of the anchoring process. The construction of the anchoring device and the means it contains to achieve this must operate consistently and reliably in different anchoring situations . The invention also solves this problem.

In one embodiment a third stage of the anchoring process must be able to be implemented. The cavities in the unit for the actuating functions and the functions carrying out the second stage of the anchoring process are to have a construction that permits the abovementioned third stage of the anchoring process that can consist of filling the cavities in question with material, cement, etc., in order to seal the second stage of the anchoring process. The invention also solves this problem.

SOLUTION

What can principally be regarded as characteristic of an anchoring device according to the invention is that it has a number of elongated elements, for example, 2, 3 or 4 , each of which during the first stage of the anchoring process occupies a position principally inside the unit. Further characteristics are that the elongated element (s) is/are designed so that by means of a force applied via the abovementioned part they are pushed out completely or partially from the unit in a direction that is different to the direction of the longitudinal axis of the unit, all with the aim of increasing the anchoring capability by means of interaction with the ground.

In one embodiment the elongated elements consist of elongated springs that are fastened together at the top in pairs and that, in their withdrawn positions in the unit, extend towards the front end or front tip of the unit. The unit is designed with side openings through which the arms can be pushed out by the application of the abovementioned forces. Thus, for example, two pairs of elongate springs are designed to form the elongated elements. The springs in each pair are held together by cross-pieces. During the first stage of the anchoring process the arms are arranged so that their tips protrude slightly through the openings. The elongated elements or arms are mounted or centred inside an opening in the unit by means of a mounting rod, elongated element, to which the elongated elements or arms are attached at their upper ends. The arms and the mounting rod can be moved lengthways relative to the unit so that when a force is applied the rod and the arms are pressed down towards the free end or tip of the unit. The pressing-down movements result in the arms being pushed out of the arrangement of the openings in directions or at angles that differ from the direction of the longitudinal axis of the unit. In their fully-extended positions the arms lie in positions which are essentially ^' at right angles to the longitudinal axis of the unit.

In one embodiment there is an internal duct between the position of the upper parts of the elongated elements when these are inside the unit and the abovementioned part of the unit. An element that can move lengthways relative to the unit is inserted in the internal duct in order to transmit to the elongate arms the exerted forces that are transmitted from the top side of the anchoring device (above the surface of the ground) to the abovementioned element which has been moved lengthways. The unit is provided with a pointed part that is provided with an internal guide duct for the mounting rod of the elongate arms (or the like) . The unit is designed with fixing attachments for sleeve parts that enclose the bottom of the elongated member (the pole) , which sleeve parts can have a mainly square or circular cross-section.

In a third stage of the anchoring process the internal cavities in the unit are filled with filling material that retains the arms or the elongated elements in well-defined protruding positions.

ADVANTAGES

By means of what is proposed in the above use can be made of a first stage that constitutes a downward driving stage, a second stage that effects the pushing out of the elements into the ground and a third stage for the locking of such completely or partially protruding elements. As a result the anchoring device will be very resistant to lateral force applied to the elongated member secured in the anchoring device, that is the telegraph pole or the like. The downward driving stage is made easier by means of the rather elongate unit being provided in a known way with a pointed material-filled front part that merges into a principally cylindrical part that holds at the top the attachment device or attachment arrangement for the pole in question.

DESCRIPTION OF THE FIGURES

A currently proposed embodiment of a device that has the characteristics that are significant for the invention will be described in the following with reference to the enclosed drawings, where Figure 1 shows in a perspective view from above an anchoring device that has adopted a position for the first stage of the anchoring process,

Figures 2-4 show a sequence of functions for the anchoring device where Figure 2 shows a first stage of the anchoring process,

Figure 3 a second stage of the anchoring process and Figure 4 a third stage of the anchoring process,

Figure 5 shows in vertical section a constructive embodiment of the anchoring device,

Figures 6 and 7 show a first sleeve arrangement for application to poles or the like, and

Figure 8 shows a second sleeve arrangement for poles or the like.

DETAILED EMBODIMENT

In Figure 1 an anchoring device is indicated by 1. The anchoring device is designed with a pointed front part 2, a cylindrical middle part 3, and an upper end part 4. The anchoring device comprises a first internal cavity 5, an internal duct 6 extending from this cavity to the upper end part 4 and a duct 7 arranged in the front part 2. The abovementioned cavities and ducts are designed with a common longitudinal axis 8. The abovementioned part 4 is provided with an impact surface 4a and attachment devices 9 fastened to this, which in the exemplary embodiment can be four in number and are evenly spaced around the perimeter of the impact surface 4a. In the embodiment shown the attachment devices are rectangular and have through- openings 9a. In the cavity 5 there are a number of elongated elements in the form of elongate arms, of which only the arms 10 and 11 can be seen clearly in the figure, while the arms 12 and 13 are only partially shown. The arms are arranged in pairs. The arms 10 and 12 form a first pair of arms and the arms 11 and 13 form a second pair of arms. The pairs of arms are connected at the top by the cross-pieces 14 and 15. The pairs of arms are attached via the abovementioned cross-pieces 14 and 15 to a mounting rod 16 that extends inside and through the abovementioned cavity 5 and is partially mounted in the duct 7 in the initial position.

An element 17 that can be moved lengthwise relative to the unit 1 is inserted in the abovementioned duct 6. The mounting attachment protrudes somewhat above the cross-pieces 14,15 and the element 17 which can be moved lengthwise interacts with the abovementioned mounting attachment. The spring-like elements 10 and 11 have tips 10a and 11a that in the initial position shown protrude slightly through the side openings 18,19 arranged in the unit 1. In a preferred embodiment the abovementioned side openings 18 and 19 are located at the transition between the cylindrical part 3 and the pointed part 2. The abovementioned arms are slightly curved at the abovementioned tips . The arms 12 and 13 have a corresponding shape to the arms 10 and 11 and are situated at corresponding side openings to the openings 18 and 19.

The principle for the use of the anchoring device is that during a first stage of the anchoring process the unit 1 is driven downwards into the ground. The arms are then in the position shown in Figure 1. The unit can be driven downwards into the ground using a pile driver of a type known per se that strikes the surface 4a. During the first stage the element 17 is removed from the anchoring device. When the unit has been driven down into the ground the element 17 is inserted into the opening 6 and force F is applied to the element 17 in the direction of the longitudinal axis 8. The element 17 transmits this force to the mounting attachment 16 and thereby to the arms 10,11,12 and 13. These are pressed downwards in the figure and by means of the arrangement of the side openings 18 and 19 the arms are pushed out through the openings in the direction of the arrows 20,21,22 and 23. The directions in question can in a preferred embodiment be chosen by way of the designs of the openings, to be essentially at right angles to the longitudinal axis 8. The securing device is pushed down and is guided up by the duct 7.

Figures 2, 3 and 4 show three different stages of the anchoring process. Figure 2 shows the downward driving stage where a downward driving force F' is applied to the surface 4a' . The ground is indicated by 24 and can consist of clay, soil and/or sandy soil. In Figure 3 the downward driving stage has been completed, after which the element 17 has been inserted in the relevant opening as described above. The force F thus pushes out the arms essentially at right angles (cf. the angle α) into the ground 24. In Figure 3 the arms 10 and 12 are shown in a fully-extended position. The figure also shows the arms with the tips turned up indicated by 10a. Figure 3 also shows parts of a pole and a lateral force F' ' on the pole. As a result of the extension of the arms 10,11,12 and 13 there is a great resistance to the abovementioned turning force F' ' on the anchoring device as such.

In Figure 4 the cavity 5 and the duct 6 (cf. Figures 1 and 3) are filled with filling material 26, 27, for example by cementing. This cementing helps to hold the extended arms in their extended position. In addition the filling gives a greater degree of homogeneity to the anchoring device as such. Figure 5 shows that the anchoring device has a length L of approx. 1 metre. The cylindrical part 3 has a diameter of approx. 180 mm, while the protruding parts

9 have a total width of approx. 360 mm. The cylindrical part is in principle constructed as a hollow cylinder constructed of two tubes 28,29 and the gap between the tubes is filled with filling material, for example concrete, 30. The inner tube 29 can have a diameter of approx. 45 mm. The pointed part 2 also has a filling of concrete 31 or similar material. The guide device 16 and the corresponding guide duct 7 in the pointed

(conical) part can have a rectangular cross-section.

Otherwise refer to the above.

Figures 6 and 7 show the anchoring principle for a pole (telegraph pole) 25. The end 25a of the pole is placed on a plate-shaped member 32. The plate-shaped member is constructed as two semicircles and is part of a sleeve- shaped part 33,34 consisting of two parts held together by clamping devices 35. The sleeve-shaped parts 33,34 are approx. 600 mm long. The plate-shaped member 32 can be anchored in the abovementioned protruding parts 9 by screwed bolt arrangements. According to Figure 7 the two sleeve parts 33 and 34 are angled so that they form an essentially square cross-section that clamps around the pole 25 at four points 33a, 33b and 34a, 34b as the pole-shaped element 25 has a circular cross-section. According to Figure 8 the sleeve parts 33' and 34' can also have semicircular extents enclosing the tip 25. In this case the plate-shaped parts are indicated by 32' . Alternatively the duct 7 can be replaced by an integral part of the rod 16 that then extends from the tip of the member upwards and a short way into the opening 6. The cross-pieces 14,15 are then able to move lengthwise on the upper part of the rod 16. The element 17 is tubular and can be threaded over the rod 16 (Figure 1) . The invention can be modified within the scope of the patent claims and the inventive concept. For example, the invention can be used for lampposts and electricity poles. In the case of wooden poles, decayed (rotten) wood on the pole can be cut off and replaced by the anchoring member.

Claims

PATENT CLAIMS

1. Anchoring device (1) for elongated members (25), for example telegraph poles and/or lampposts, designed as an elongate unit (2,3) that at one end (4) has a part (4a) that is subjected to downward driving force (F') in order to make possible the downward driving of the unit into the ground (24) during a first stage of the anchoring process, characterized in that it has a number of arms, for example two, three or four, (10,11,12,13) each of which during the first stage of the anchoring process occupies a position principally inside the unit and in that the arm(s) is/are designed so that by means of a force (F) applied via the abovementioned part (4a) they are pushed out completely or partially from the unit in a direction (20,21,22,23) that is different to the direction of the longitudinal axis (8) of the unit, with the aim of increasing the anchoring capability by means of interaction with the ground.

2. Device according to Patent Claim 1, characterized in that the elongated elements (10,11,12,13) are in the form of elongate springs that are fastened together at the top in pairs (10 and 12, 11 and 13) and that, in the position they are in inside the unit, extend towards the front end (2) of the unit and in that the unit is designed with side openings (18,19) through which the arms are pushed out by the application of the abovementioned force (F).

3. Device according to Patent Claim 2, characterized in that two pairs of arms (10 and 12, 11 and 13) are designed to form the elongated elements and in that the arms in each pair are held together by cross-pieces (14 and 15 respectively) .

4. Device according to Patent Claim 2 or 3, characterized in that during the first stage of the anchoring process the tips of the arms protrude slightly through the openings (18,19).

5. Device according to any of the preceding patent claims, characterized in that the elongated elements/ arms are mounted/centred inside an opening (5) in the unit by means of a mounting rod (16) to which the elongated elements/arms are attached at their upper ends and in that the mounting attachment can be moved lengthways relative to the unit so that when a force (F) is applied the mounting attachment and the arms are pressed down towards the free end (2) of the unit, whereupon the pressing-down movements result in the arms being pushed out of the openings (18,19) at angles that differ from the direction of the longitudinal axis of the unit and in their fully-extended positions or state the arms lie preferably in positions which are essentially at right angles to the longitudinal axis (8) of the unit.

6. Device according to any of the preceding patent claims, characterized in that there is an internal duct

(6) between the position of the upper parts of the arms (10,11,12,13) when these are inside the unit and the abovementioned part (4a) of the unit.

7. Device according to any of the preceding patent claims, characterized in that an element (17) that can be moved lengthways relative to the unit (2,3) is inserted in the internal duct (16) in order to transmit to the elongate arms the operating force (F) that is applied to the element which has been moved lengthways above the abovementioned part (4a) .

8. Device according to any of the preceding patent claims, characterized in that the unit is provided with a tip (2) that is provided with an internal guide duct

(7) for mounting attachments (16) for the elongate arms .

9. Device according to any of the preceding patent claims, characterized in that the unit is designed with fixing attachments (9) for sleeve-shaped parts that enclose the bottom of the elongated member (the telegraph pole), which sleeve-shaped parts (33,34) can have a mainly square or circular cross-section.

10. Device according to any of the preceding patent claims, characterized in that the internal cavities (5, 16) for holding the elongated elements/arms inside the unit and the duct (6) for applying the force during the second stage of the anchoring process are designed to be filled during a third stage of the anchoring process with filling material (concrete, cement, etc.) after the completion of the second stage of the anchoring process .

11. Device according to any of the preceding patent claims 5-10, characterized in that the mounting attachment (16) extends from the tip of the member and a little way into the internal duct (6) and is mounted/fixed inside the member, preferably by means of a filling (31) arranged at the abovementioned tip and/or in that the mounting parts (14,15) for the arms (10-13) can be moved lengthways relative to the mounting rod (16) at its upper parts, by means of the element (17) which can be moved lengthways and which is preferably in the shape of a tube which can be threaded over the upper parts of the mounting attachment (16) via the internal duct (6) .