Clamp
According to an aspect of the present invention, there is provided. A clamping apparatus, comprising: a first clamp provided with: a first clamp surface; a second clamp surface; and a substantially straight shaft, the first clamp surface and second clamp surface being arranged to be moveable relative to each other along the shaft to clamp an object between the first clamp surface and the second clamp surface, at least one of the clamp surfaces being releasably fixable, and a second clamp provided on an arm which extends from the second clamp surface, the arm extending in a direction substantially perpendicular to the shaft. According to another aspect of the present invention, there is provided a method of using the clamp.
The present invention relates to a clamp and a method of using that clamp.
For many years, the application of a facade to a newly constructed building was undertaken using scaffolding. Scaffolding would be erected around the newly constructed building, and workers would use the scaffolding to reach appropriate places around the external surface of the new building to apply (or complete) the facade. However, in more recent times, the use of scaffolding to apply a facade to a newly constructed building (or to refurbish and existing building) has been replaced with a technique known as curtain-walling. Whereas in the use of scaffolding the facade is applied from the outside of the building, using curtain-walling the facade may be applied from the inside of the building and supported from the floors of the building. Curtain-walling has become more popular in recent years due to the increased height of newly constructed buildings, as well as the lack of space around newly constructed buildings in densely populated areas, both of which make the use of scaffolding more difficult.
Although curtain-walling is becoming a more popular technique with which to apply a facade to a building, the methods and apparatus used to carry out curtain-walling can be improved. For example, the use of curtain-walling to apply a facade to a building requires the accurate location and alignment of substantially U-shaped channels (often referred to in the industry as Halfen channels, and generally referred to as fixing channels). Current techniques used to locate and align these U-shaped channels are not satisfactory, and can result in misalignment. If the U-shaped channels are misaligned, it is difficult or impossible to apply a facade to the building using these channels. It is often necessary to realign these U-shaped channels so that the facade can be applied to the building using the channels. Realignment of the channels may involve time consuming excavation of the channels from concrete. The time taken to realign these channels can increase the cost of the building, as well as incurring delays in the construction of the building which can incur further costs.
It is therefore an object of the present invention to obviate or mitigate at least some of the disadvantages mentioned above.
According to a first aspect of the present invention there is provided a clamping apparatus, comprising: a first clamp provided with: a first clamp surface; a second clamp surface; and a substantially straight shaft, the first clamp surface and second clamp surface being arranged to be moveable relative to each other along the shaft to clamp an object between the first clamp surface and the second clamp surface, at least one of the clamp surfaces being releasably fixable, and a second clamp provided on an arm which extends from the second clamp surface, the arm extending in a direction substantially perpendicular to the shaft.
According to second aspect of the present invention there is provided a method of clamping a fixing channel in position relative to a floor slab sub structure, comprising: moving at least one of a first clamp surface and a second clamp surface of a first clamp along a substantially straight shaft, and releasably fixing the at least one clamp surface to clamp between the first clamp surface and the second clamp surface the floor slab sub structure and an upstand extending from the floor slab sub structure; using a second clamp which is attached to the first clamp to clamp the fixing channel so that the fixing channel is parallel to the floor slab sub structure and in a position substantially perpendicular to and away from the shaft.
An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:
The above mentioned figures have not been drawn to scale. Identical features have been given identical reference numbers throughout the figures.
The use of scaffolding is not always desirable. If the building is of a certain height, the use of scaffolding may not be appropriate or even safe. Furthermore, if space around the building is restricted, the use of scaffolding may not be possible. Thus, the use of curtain-walling in recent years has become more popular.
A typical apparatus and method for fixing the curtain-walling to the sides of buildings is shown in
It can be seen from the Figure that the substantially U-shaped channel 8 is not exactly U-shaped, but has inwardly facing lips. The lips are used to prevent a fixing element from moving out of the channel when the fixing element has been appropriately positioned in the channel (as described below). The substantially U-shaped channel 8 is abbreviated to ‘U-shaped channel’ hereafter.
Once the construction of
The bracket 11 is of a sufficient length to overhang the side of the building and the floor slab sub structure 2. The curtain-walling section 4 may be attached to the bracket, and therefore suspended from the floor slab sub structure 2, by attaching the curtain-walling section 4 to the bracket 11. The curtain-walling section can be attached to the bracket 11 by way of a conventional nut and bolt arrangement 14.
The misaligned U-shaped channel 8 is fixed in position when concrete 10 is poured in and around the U-shaped channel and allowed to set. The actual pouring of the concrete can cause further misalignment of the U-shaped channel 8.
Although in theory the problems described in relation to
The clamping apparatus 20 is provided with a guide rail 25. The guide rail 25 extends from the second clamp surface 22 towards and through the first clamp surface 21. The guide rail 25 makes the clamping apparatus 20 more rigid.
The second clamp surface 22 is provided with an elongate arm 26. The elongate arm 26 extends away from the threaded shaft 23 and is substantially perpendicular to the threaded shaft 23. Provided on the elongate arm 26 is a second clamp. The second clamp is provided with an elongate fixing element 12. The elongate fixing element 12 is provided with a threaded shaft 27 that extends through the elongate arm 26. The threaded shaft 27 and elongate fixing element 12 are fixed in position by a wing nut 28. The wing nut 28 can be tightened to clamp the elongate fixing element 12 in position. An object can be clamped between the elongate fixing element 12 and the elongate arm 26.
When not fixed in position by the wing nut 28, the elongate fixing element 12 may be moved along a slot provided in the elongate arm 26 (the slot is not shown in
The clamping apparatus 20 can be constructed from any suitable material. For example, the clamping apparatus 20 can be constructed from aluminium, steel, etc.
Use of the clamping apparatus 20 of
It can be seen from
A U-shaped channel 8 is clamped in position between the elongate fixing element 12 and the elongate arm 26 using a wing nut 28 and threaded shaft 27. The U-shaped channel 8 can be clamped in position before or after the clamping apparatus 20 has been attached to the floor slab sub structure 2 and upstand 5. The elongate fixing element 12 can be moved to a desired location along the length of the elongate arm 26.
Since the elongate arm 26 extends parallel to the floor slab sub structure 2, and since the U-shaped channel 8 is clamped to the elongate arm 26, the U-shaped channel 8 is also aligned parallel to the floor slab sub structure 2, as well as being level with the uppermost surface of the upstand 5.
It will be appreciated that the method and apparatus used to apply curtain-walling to the building described in relation to
It will be appreciated that the guide rail 25 is not essential to the operation of the clamping apparatus 20. The guide rail only serves to add rigidity and structural support to the clamping apparatus 20. Similarly, it will be appreciated that the second clamp (e.g. that comprising the wing nut 28, threaded shaft 27 and elongate fixing element 12) need not be moveable along the length of the elongate arm 26. However, the movement of the second clamp along the elongate arm 26 allows a certain degree of flexibility in the positioning of the U-shaped channel 8, as will be described further below.
As described above it can be seen from the Figures that the substantially U-shaped channel 8 is not exactly U-shaped, but has inwardly facing lips. As stated above, the lips are used to prevent a fixing element from moving out of the channel when the fixing element has been appropriately positioned in the channel. It will be appreciated that the channel need not be U-shaped, but can be of another shape which defines a channel for reception of a fixing element. For example, the cross-section of the channel can be substantially triangular, trapezoidal, rectangular etc., the channel having lips to prevent a fixing element from moving out of the channel when the fixing element has been appropriately positioned in the channel. Such channels are referred to generally as fixing channels (see for example the fixing channels manufactured and sold by Ancon Building Products, Sheffield, UK).
An elongate fixing element is a fixing element which has a greater length than width. For example, an elongate fixing element may be an elongate piece of metal, such as an abbeysolt. By using an elongate fixing element, the fixing element can be fixed in position in a fixing channel. To do this, the elongate fixing element is oriented so that its length is parallel to that of the channel. The elongate fixing element is then located in the channel. The elongate fixing element is then rotated such that its length is perpendicular to the length of the channel, the lips of the fixing channel preventing the fixing element from being removed.
It will be appreciated by one having ordinary skill in the art that the above embodiments are given by way of example only. One having ordinary skill in the at will appreciate that various modifications may be made to the described embodiments without departing from the invention as defined by the claims that follow.
Claims
1. A clamping apparatus, comprising:
- a first clamp provided with: a first clamp surface;
- a second clamp surface; and
- a substantially straight shaft, the first clamp surface and second clamp surface being arranged to be moveable relative to each other along the shaft to clamp an object between the first clamp surface and the second clamp surface, at least one of the clamp surfaces being releasably fixable, and a second clamp provided on an arm which extends from the second clamp surface, the arm extending in a direction substantially perpendicular to the shaft.
2. A clamp as claim in claim 1, wherein the first clamp surface is fixed in position relative to the shaft, and the second clamp surface is moveable relative to the first clamp surface.
3. A clamp as claimed in claim 2, wherein the shaft extends from the first clamp through the second clamp surface.
4. A clamp as claimed in claim 1, wherein the second clamp is moveable along the arm, in a direction substantially perpendicular to the length of the shaft.
5. A clamp as claimed in claim 4, wherein the second clamp is moveable along a slot provided in the arm.
6. A clamp as claimed in claim 1, further comprising a guide rail, the guide rail being substantially straight and parallel to shaft, extending between the first clamp surface and second clamp surface.
7. A clamp as claimed in claim 6, wherein the guide rail extends from the second clamp surface through the first clamp surface.
8. A clamp as claimed in claim 1, wherein the shaft is provided with a securing element for releasably securing at least one of the clamp surfaces in position when the first clamp is arranged to clamp an object.
9. A clamp as claimed in claim 1, wherein the second clamp comprises a shaft which extends through the arm, the shaft being arranged to engage with a securing element on one side of the arm, and the shaft being provided with a clamp surface on another side of the arm which is arranged to clamp an object inbetween the clamp surface and the arm.
10. A clamp as claimed in claim 9, wherein the clamp surface is provided by an elongate fixing element.
11. A clamp as claimed in claim 10, wherein the elongate fixing element is shaped to engage with a fixing channel.
12. A clamp as claimed in claim 8, wherein the securing element is a wing nut.
13. A method of clamping a fixing channel in position relative to a floor slab sub structure, comprising:
- moving at least one of a first clamp surface and a second clamp surface of a first clamp along a substantially straight shaft, and releasably fixing the at least one clamp surface to clamp between the first clamp surface and the second clamp surface the floor slab sub structure and an upstand extending from the floor slab sub structure;
- using a second clamp which is attached to the first clamp to clamp the fixing channel so that the fixing channel is parallel to the floor slab sub structure and in a position substantially perpendicular to and away from the shaft.
14. A method as claimed in claim 13, wherein the fixing channel is clamped in position before the first clamp is used to attach the clamp to the floor slab sub structure and upstand.
15. A method as claimed in claim 13, wherein the fixing channel is clamped in position after the first clamp is used to attach the clamp to the floor slab sub structure and upstand.
16. A method as claimed in claim 13, further comprising setting the fixing channel in position before removing the clamp and unclamping the fixing channel.
17. A method as claimed in claim 16, wherein the fixing channel is fixed in position using concrete or cement.
18. A method as claimed in claim 17, wherein the concrete or cement is poured onto the floor slab sub structure, the extent to which the concrete or cement flows across the floor slab sub structure being restricted, at least in part, by the upstand.
19. A method as claimed in claim 16, wherein a curtain walling section is attached to the fixing channel.
20. A method as claimed in claim 19, wherein a curtain walling section is attached to the bracket.
21. A method as claimed in claim 16, wherein a curtain walling section is attached to the fixing channel.
22. (canceled)
23. (canceled)
Type: Application
Filed: Jul 5, 2007
Publication Date: Feb 4, 2010
Inventor: Alan Whitby (Cheshire)
Application Number: 12/309,050
International Classification: E04B 1/38 (20060101); E04G 21/18 (20060101);