WO2021144670A1 - Formwork Support - Google Patents
Formwork Support Download PDFInfo
- Publication number
- WO2021144670A1 WO2021144670A1 PCT/IB2021/050118 IB2021050118W WO2021144670A1 WO 2021144670 A1 WO2021144670 A1 WO 2021144670A1 IB 2021050118 W IB2021050118 W IB 2021050118W WO 2021144670 A1 WO2021144670 A1 WO 2021144670A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamp member
- reinforcing bar
- formwork
- clamp
- locating
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
- E04G21/185—Means for positioning building parts or elements for anchoring elements or elements to be incorporated in the structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
Definitions
- the invention is concerned with the articles and methods for preventing collapse of formwork
- Formwork is the general term given to the mould into which concrete is poured to form, for instance, a wall, the mould having extending therethrough a plurality of parallel reinforcing bars.
- the strength of the formwork must be sufficient to support the weight of the wet concrete without significant distortion.
- the formwork may comprise two spaced apart panels which are connected together by means of bolts so as to define a space into which the concrete is poured. Once the concrete has set the bolts are removed but in doing this there is a risk that the panel may fall over and cause injury to someone in the vicinity.
- a safety device for securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the device comprising a first clamp member for locating around the reinforcing bar and a second clamp member for locating around an upper section of the panel, and a connection member for connecting together the first and second clamp members.
- the first clamp member comprises an elongate plate having a slot therein, within which may be located a reinforcing bar.
- the plate is provided with flange portions extending on each side of and parallel to the slot.
- the flange portions are provided with aligned holes, more preferably with two pairs of aligned holes.
- the second clamp member is a bracket having short and long side portions interconnected by a base portion.
- the long side portion of the bracket is provided on its outside surface and at about halfway therealong with a laterally extending tube.
- the first clamp member comprises a rod which can be secured within said tube to prevent relative movement between the clamp members.
- the present invention also provides a method of securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the method comprising providing a device of the invention, locating the first clamp member about the reinforcing bar, locating the second clamp member about an upper section of the formwork panel and securing the clamp members together in such a way as to prevention relative movement therebetween.
- Figure 1 shows the separated components of an embodiment of a safety device in accordance with the present invention
- Figure 2 is a perspective view showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar;
- Figure 3 is a side elevation showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar; and
- Figure 4 is a top plan view showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar;
- An embodiment of the present invention is a safety device 1 for ensuring that a formwork panel does not fall down when the bolts keeping in in place until concrete has set are removed
- the device 1 is a clamp for securing a formwork panel to a reinforcing bar located in a mould defined by a plurality of formwork panels.
- Device 1 comprises a first clamp member 3 which is an elongate U-shaped plate having leg portions 5 defining a slot 7 and each having an upturned flange portion 9.
- Each flange portion 9 is provided with two adjacent apertures 11 located about one third of the way from the open end of slot 7 to the bight end of plate 3.
- Device 1 includes a second clamp member 13 which is a bracket 15 having short and long side portions 17 and 19 respectively and an interconnecting base portion 21.
- the width of bracket 15 is slightly less than the distance between the two flange portions 9.
- Short side portion 17 has a somewhat narrowed end and the long side portion 19 has formed on its outside and at about halfway therealong a laterally extending square cross section tube 22.
- Device 1 further includes a short rod 23 of a diameter such that it may be located within tube 22 and of a length somewhat greater than tube 22. At one end rod 23 is provided with a bore 25 extending laterally therethrough and at the other end with a chain 27 and attached thereto a cotter pin 29.
- Figures 2 to 4 of the accompanying drawings illustrate the use of device 1 to secure a formwork panel 31 to a reinforcing bar 33.
- the first clamp member 3 is positioned around reinforcing bar 33 so that bar 33 is located at the blind end of the slot 7.
- Member 3 extends laterally over the top of the formwork panel 35, comprising ply layer 37 and shutter 39, reaching across about three quarters of the width of shutter 39 which form formwork panel 39.
- the second clamp member 13 is then located so that its long side portion 19 extends between flange portions 9 of first clamp member 3 and with the base portion 21 and short side portion 17 extending downwardly and inwardly around the top section 4 of shutter 39.
- Rod 23 is then pushed through one of the pairs of aligned apertures 11 and locked in position by means of cotter pin 29 extending through bore 25. This in turn locks first clamp member 3 against movement relative to second clamp member 13 and in so doing prevents relative movement of the formwork panel 35 away from the reinforcing bar 33.
- the formwork panel is maintained in position even after the bolts (not shown), which interconnect the formwork panels during the formation of the concrete wall, have been removed, thereby avoiding any possibility of the formwork panel falling down and causing injury to anyone located in the vicinity.
- the above described device may be made of any suitable materials, including metals, plastics and a combination thereof.
Abstract
A safety device is for securing a formwork panel to a reinforcing bar located within a mould defined by the formwork. The device comprises a first clamp member (3) for locating around the reinforcing bar and a second clamp member (13) for locating around an upper section of the panel, and a connection member (23) for connecting together the first and second clamp members. Also disclosed is a method of using such a safety device.
Description
Formwork Support
Field of the invention
The invention is concerned with the articles and methods for preventing collapse of formwork
Background to the Invention
Formwork is the general term given to the mould into which concrete is poured to form, for instance, a wall, the mould having extending therethrough a plurality of parallel reinforcing bars. The strength of the formwork must be sufficient to support the weight of the wet concrete without significant distortion. The formwork may comprise two spaced apart panels which are connected together by means of bolts so as to define a space into which the concrete is poured. Once the concrete has set the bolts are removed but in doing this there is a risk that the panel may fall over and cause injury to someone in the vicinity.
Statements of the Invention
According to the present invention there is provided a safety device for securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the device comprising a first clamp member for locating around the reinforcing bar and a second clamp member for locating around an upper section of the panel, and a connection member for connecting together the first and second clamp members.
Preferably, the first clamp member comprises an elongate plate having a slot therein, within which may be located a reinforcing bar.
More preferably, the plate is provided with flange portions extending on each side of and parallel to the slot.
Preferably, the flange portions are provided with aligned holes, more preferably with two pairs of aligned holes. Preferably, the second clamp member is a bracket having short and long side portions interconnected by a base portion.
Preferably, the long side portion of the bracket is provided on its outside surface and at about halfway therealong with a laterally extending tube.
Preferably, the first clamp member comprises a rod which can be secured within said tube to prevent relative movement between the clamp members.
The present invention also provides a method of securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the method comprising providing a device of the invention, locating the first clamp member about the reinforcing bar, locating the second clamp member about an upper section of the formwork panel and securing the clamp members together in such a way as to prevention relative movement therebetween.
Brief Description of the Drawings
The accompanying drawings are as follows:
Figure 1 shows the separated components of an embodiment of a safety device in accordance with the present invention; Figure 2 is a perspective view showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar;
Figure 3 is a side elevation showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar; and
Figure 4 is a top plan view showing the safety device of Figure 1 clamping a formwork panel to a reinforcing bar;
Detailed description of the Invention The present invention will now be described, by way of example only, with reference to the accompanying drawings.
An embodiment of the present invention is a safety device 1 for ensuring that a formwork panel does not fall down when the bolts keeping in in place until concrete has set are removed
The device 1 is a clamp for securing a formwork panel to a reinforcing bar located in a mould defined by a plurality of formwork panels. Device 1 comprises a first clamp member 3 which is an elongate U-shaped plate having leg portions 5 defining a slot 7 and each having an upturned flange portion 9. Each flange portion 9 is provided with two adjacent apertures 11 located about one third of the way from the open end of slot 7 to the bight end of plate 3.
Device 1 includes a second clamp member 13 which is a bracket 15 having short and long side portions 17 and 19 respectively and an interconnecting base portion 21. The width of bracket 15 is slightly less than the distance between the two flange portions 9. Short side portion 17 has a somewhat narrowed end and the long side portion 19 has formed on its outside and at about halfway therealong a laterally extending square cross section tube 22.
Device 1 further includes a short rod 23 of a diameter such that it may be located within tube 22 and of a length somewhat greater than tube 22. At one end rod 23 is provided with a bore 25 extending laterally therethrough and at the other end with a chain 27 and attached thereto a cotter pin 29.
Figures 2 to 4 of the accompanying drawings illustrate the use of device 1 to secure a formwork panel 31 to a reinforcing bar 33. In order to locate device 1 in position, the first clamp member 3 is positioned around reinforcing bar 33 so that bar 33 is located at the blind end of the slot 7. Member 3 extends laterally over the top of the formwork panel 35, comprising ply layer 37 and shutter 39, reaching across about three quarters of the width of shutter 39 which form formwork panel 39. The second clamp member 13 is then located so that its long side portion 19 extends between flange portions 9 of first clamp member 3 and with the base portion 21 and short side portion 17 extending downwardly and inwardly around the top section 4 of shutter 39. Rod 23 is then pushed through one of the pairs of aligned apertures 11 and locked in position by means of cotter pin 29 extending through bore 25. This in turn locks first clamp member 3 against movement relative to second clamp member 13 and in so doing prevents relative movement of the formwork panel 35 away from the reinforcing bar 33.
In this way, the formwork panel is maintained in position even after the bolts (not shown), which interconnect the formwork panels during the formation of the concrete wall, have been removed, thereby avoiding any possibility of the formwork panel falling down and causing injury to anyone located in the vicinity. The above described device may be made of any suitable materials, including metals, plastics and a combination thereof.
Claims
1. A safety device for securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the device comprising a first clamp member for locating around the reinforcing bar and a second clamp member for locating around an upper section of the panel, and a connection member for connecting together the first and second clamp members.
2. A device according to Claim 1, wherein the first clamp member comprises an elongate plate having a slot therein, within which may be located a reinforcing bar.
3. A device according to Claim 2, wherein the plate is provided with flange portions extending on each side of and parallel to the slot.
4. A device according to Claim 3, wherein the flange portions are provided with aligned holes.
5. A device according to Claim 4, wherein the flange portions are provided with two pairs of aligned holes.
6. A device according to any of the preceding claims, wherein the second clamp member is a bracket having short and long side portions interconnected by a base portion.
7. A device according to Claim 6, wherein the long side portion of the bracket is provided on its outside surface and at about halfway therealong with a laterally extending tube.
8. A device according to Claim 7, wherein the first clamp member comprises a rod which can be secured within said tube to prevent relative movement between the clamp members.
9. A method of securing a formwork panel to a reinforcing bar located within a mould defined by the formwork, the method comprising providing a device according to any of the preceding claims, locating the first clamp member about the reinforcing bar, locating the second clamp member about an upper section of the formwork panel and securing the clamp members together in such a way as to prevention relative movement therebetween.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2000572.4 | 2020-01-15 | ||
GBGB2000572.4A GB202000572D0 (en) | 2020-01-15 | 2020-01-15 | Formwork support |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021144670A1 true WO2021144670A1 (en) | 2021-07-22 |
Family
ID=69626325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2021/050118 WO2021144670A1 (en) | 2020-01-15 | 2021-01-08 | Formwork Support |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB202000572D0 (en) |
WO (1) | WO2021144670A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2911702A (en) * | 1955-07-11 | 1959-11-10 | Poliete S Clyncke | Holding devices for form boards and the like |
JPS5645047U (en) * | 1979-09-13 | 1981-04-23 | ||
JPH03101750U (en) * | 1990-02-01 | 1991-10-23 |
-
2020
- 2020-01-15 GB GBGB2000572.4A patent/GB202000572D0/en not_active Ceased
-
2021
- 2021-01-08 WO PCT/IB2021/050118 patent/WO2021144670A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2911702A (en) * | 1955-07-11 | 1959-11-10 | Poliete S Clyncke | Holding devices for form boards and the like |
JPS5645047U (en) * | 1979-09-13 | 1981-04-23 | ||
JPH03101750U (en) * | 1990-02-01 | 1991-10-23 |
Also Published As
Publication number | Publication date |
---|---|
GB202000572D0 (en) | 2020-02-26 |
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