Sawhorse trestle

Abstract

A sawhorse trestle comprising a first 110 and second upright 120, and a platform (130, figure 1b) comprising a support surface wherein the platform is supported by the first upright, and the platform

Description

TECHNOLOGICAL FIELD Examples of the disclosure relate to a sawhorse trestle. Some relate to a sawhorse trestle for supporting a workpiece for sawing. BACKGROUND In woodworking and construction, a sawhorse is used to support a workpiece for sawing. The workpiece may be a board, plank or sheet. The workpiece may be wood or another material such as plasterboard. The workpiece may be cut to a desired size. Sawhorses can have a trestle structure. Two sawhorse trestles may be used to support a board or a plank. in supporting material for accurate cutting, it is often necessary to reposition the sheet during sawing to avoid cutting the sawhorse itself. This is inconvenient and leads to inaccuracy. There is also a need for a convenient means of supporting large boards or sheets securely in such a way that long cuts may be made continuously without needing to adjust their position and so as to prevent tearing of the material during the cut. BRIEF SUMMARY According to various, but not necessarily all, examples there is provided a first upright; a second upright; and a platform comprising a support surface. The platform is supported by the first upright. The platform is movable relative to the first upright and the second upright in order to adjust the size of an opening. A first direction is defined by a direction from the first upright to the second upright. The opening is open on both sides in a direction substantially perpendicular to the first direction. The opening may be positioned between the first and second uprights. The platform may be configured to move in a direction substantially parallel to the first direction. The sawhorse trestle may be configured such that movement of the platform adjusts the opening without movement of the first upright or the second upright. The sawhorse trestle may further comprise a connection means that fixedly connects the first upright to the second upright. The first upright and second upright may be half trestles. The platform may be configured to slide relative to the first upright and the second upright in order to adjust the size of the opening. The platform may be substantially horizontal and the support surface may be a top surface for supporting a work piece. The sawhorse trestle may further comprise locking means to lock the position of the platform relative to the first upright and / or the second upright. The locking means may be configured to lock the position of the platform relative to the first upright and / or the second upright in a plurality of positions. The first upright may comprise a rail, the platform may comprise a groove for the rail and the platform may be configured to slide on the rail. The locking means may comprise a member positioned inside the groove. The locking means may be configured such that when the locking means is in an unlocked configuration the member exhibits lower force on a side of the groove allowing the platform to move relative to the rail. The locking means may be configured such that when the locking means is in a locked configuration the member exhibits a higher force on a side of the groove, resisting movement of the platform relative to the rail. The locking means may further comprise a connector connected to the member. Movement of the connector may cause movement of the member which causes the locking means to switch between the locked and unlocked configurations. The locking means further comprises a handle and a cam, wherein the cam is coupled to the handle and the connector. The cam may be configured to convert rotational movement of the handle to translational movement of the connector, and thus translational movement of the member. The platform may comprise: a first platform portion comprising a first support surface, and a second platform portion comprising a second support surface. The support surface may comprise the first support surface and the second support surface. The first platform portion may be supported by the first upright and the second platform portion may be supported by the second upright. The first platform portion may be configured to move relative to the first upright in order to adjust the size of the opening. The second platform portion may be configured to move relative to the second upright in order to adjust the size of the opening. The opening may be between the first platform portion and the second platform portion. The sawhorse trestle may further comprise a fastening means for fastening the first platform portion to the second platform portion. The fastening means may comprise a rod which runs through the second platform portion, and an aperture in the first platform portion for receiving a portion of the rod. The rod may comprise a protrusion at or near the end of the rod which is substantially perpendicular to the axial direction of the rod. The first platform portion may comprise a primary aperture for receiving the portion of the rod, and a secondary aperture for receiving the protrusion. The rod may be rotatable and the fastening means may configured such that in a first position the protrusion is aligned with the secondary aperture and can pass though the secondary aperture. The fastening means may be configured such that if the rod is rotated to a second position, the protrusion is not aligned with the secondary aperture and cannot pass though the secondary aperture, so fastening the first platform portion and second platform portion together. The fastening means may further comprise a biasing means to bias the rod into the primary aperture. The fastening means may further comprise a biasing means to bias the protrusion into a position where it is not aligned with secondary aperture. According to various, but not necessarily all, examples there is provided a sawhorse comprising: a first sawhorse trestle, a second sawhorse trestle, and a connecting platform. The connecting platform is configured to be detachably connected to the first trestle and the second trestle to connect the first trestle to the second trestle. The first sawhorse trestle may provide a first support surface. The second sawhorse trestle provide a second support surface. The connecting platform may provide a third support surface. The first, second and third support surfaces may be substantially the same height. The connecting platform may be positionable along the length of the first sawhorse trestle. According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for performing at least part of one or more methods described herein. The description of a function and / or action should additionally be considered to also disclose any means suitable for performing that function and / or action. Functions and / or actions described herein can be performed in any suitable way using any suitable method. According to various, but not necessarily all, embodiments there is provided examples as claimed in the appended claims. While the above examples of the disclosure and optional features are described separately, it is to be understood that their provision in all possible combinations and permutations is contained within the disclosure. It is to be understood that various examples of the disclosure can comprise any or all the features described in respect of other examples of the disclosure, and vice versa. Also, it is to be appreciated that any one or more or all the features, in any combination, may be implemented by / comprised in / performable by an apparatus, a method, and / or computer program instructions as desired, and as appropriate. The description of a function should additionally be considered to also disclose any means suitable for performing that function BRIEF DESCRIPTION Some examples will now be described with reference to the accompanying drawings in which: Figs 1a and 1b illustrate a first example of a sawhorse trestle; Figs 2a and 2b illustrate a second example of a sawhorse trestle; Figs 3a and 3b illustrate a third example of a sawhorse trestle; Figs 4a and 4b illustrate cross sectional views of part of the third example of a sawhorse trestle; Fig. 4c illustrates a perspective view of part of the third example of a sawhorse trestle; Fig. 5 illustrates a view of a part of the third example of a sawhorse trestle; Figs 6a and 6b illustrate part of the third example of a sawhorse trestle; Fig. 7 illustrates part of the third example of a sawhorse trestle; Fig. 8 illustrates an example of a sawhorse; and Figs 9a and 9b illustrate views of part of the example of a sawhorse. The figures are not necessarily to scale. Certain features and views of the figures can be shown schematically or exaggerated in scale in the interest of clarity and conciseness. For example, the dimensions of some elements in the figures can be exaggerated relative to other elements to aid explication. Similar reference numerals are used in the figures to designate similar features. For clarity, all reference numerals are not necessarily displayed in all figures. DETAILED DESCRIPTION Figs 1a and 1b illustrate a first example of a sawhorse trestle 100 according to embodiments of the disclosure. Fig. 1a shows the sawhorse trestle 100 in a first state where the opening 140 is closed. Fig. 1b shows the sawhorse trestle 100 in a second state where the opening 140 is open. The sawhorse trestle 100 comprises: a first upright 110; a second upright 120; and a platform 130. The platform 130 comprises a support surface 131, and is supported by the first upright 110. The platform 130 is movable relative to the first upright 110 and the second upright 120 in order to adjust the size of an opening 140. Adjusting the size of the opening 140 can include creating the opening 140, i.e. transitioning from the first state to the second state. The illustrated platform 130 is substantially horizontal and the support surface 131 is a top surface for supporting a workpiece. In the illustrated example the platform 130 is on top of the first upright 110, and the platform 130 comprises a horizontal bar. In some examples the sawhorse trestle 100 may comprise securing means, for securing the workpiece to the support surface 131. For example, the securing means may comprise clamps or straps. A first direction is defined by a direction from the first upright 110 to the second upright 120. The opening 140 is open on both sides in a direction substantially perpendicular to the first direction. The illustrated platform 130 is configured to move in a direction substantially parallel to the first direction. In some examples the platform 130 is configured to move in a direction at least partially parallel to the first direction. In the illustrated example, the opening 140 is positioned between the first and second uprights 110, 120. In some examples, the opening 140 is open on top. In some examples, the opening 140 is open on top and on both sides perpendicular to a direction from the first upright 110 to the second upright 120. This opening 140 allows the passage of a saw blade or similar tool while the support surface 131 supports the workpiece being sawn. Such an arrangement also aids in supporting both pieces of a work-piece during cutting and following completion of the cut, reducing the need for a second operator to hold one or both pieces. Adjusting the size of the opening 140 both allows a saw blade to pass through and adjusts the effective width of the sawhorse trestle 100. This may be useful for different sized workpieces. In some examples, the platform 130 is configured to slide relative to the first upright 110 and the second upright 120 in order to adjust the size of the opening 140. In some examples, the first upright 110 comprises a rail, the platform 130 comprises a groove for the rail and the platform 130 is configured to slide on the rail. In other examples, the platform 130 may move in a different way to adjust the size of the opening 140, such as being hinged, or folding and unfolding. In some examples, the sawhorse trestle 100 is configured such that movement of the platform 130 adjusts the opening 140 without movement of the first upright 110 or the second upright 120. This provides the advantage that the sawhorse trestle 100 is more stable, allowing more accurate cutting. It also allow the opening 140 to be adjusted even when a work piece is supported by the sawhorse trestle 100. This makes the process quicker, easier and less labour intensive. It also allows the cutting to take place in a a smaller area, or for the sawhorse trestle 100 to located in an area where some of the ground might not be suitable for it. Figs 2a and 2b illustrate a second example of a sawhorse trestle 100 according to embodiments of the disclosure. Fig. 2a shows the sawhorse trestle 100 in a state where the opening 140 is closed. Fig. 2b shows the sawhorse trestle 100 in a state where the opening 140 is open. The second example of a sawhorse trestle 100 may comprise some or all of the features of the first example of a sawhorse trestle 100. The second example of a sawhorse trestle 100 is similar to the first example of a sawhorse trestle 100 with some differences. In this example, the sawhorse trestle 100 further comprises a connection means 150 that fixedly connects the first upright 110 to the second upright 120. In some examples, the connection means connects the first upright 110 to the second upright 120 such that the first upright 110 does not move relative to the second upright 120. The connection means 150 may comprise a panel or bar. In the illustrated example, the first upright 110 and second upright 120 each comprise a foot 111, 121 which can improve stability. In some examples first upright 110 comprises a single leg and the second upright 120 comprises a single leg. In other examples, such as in Figs 3a and 3b, the first upright 110 and / or second upright 120 can comprise multiple legs. In some examples, the feet 111, 121 and / or legs are adjustable. In the illustrated example, the platform 130 comprises: a first platform portion 133 comprising a first support surface 134, and a second platform portion 135 comprising a second support surface 136. The support surface 131 comprises the first support surface 134 and the second support surface 136 and so the support surface 131 can be discontinuous. The first platform portion 133 is supported by the first upright 110 and the second platform portion 135 is supported by the second upright 120. The first platform portion 133 is configured to move relative to the first upright 110, and the second platform portion 135 is configured to move relative to the second upright, 120 in order to adjust the size of the opening 140. It will be appreciated that either one or both of the platform portions 133, 135 may move to adjust the opening 140. The illustrated opening 140 is between the first platform portion 133 and the second platform portion 135. In this example, the first platform portion 133 and the second platform portion 135 form sides of the opening 140. In some examples, the sawhorse trestle 100 further comprising locking means 115, 125 to lock the position of the platform 130 relative to the first upright 110 and / or the second upright 120. In some examples, the locking means 115, 125 is configured to lock the position of the platform 130 relative to the first upright 110 and / or the second upright 120 in a plurality of positions. The locking means 115, 125 may comprise a clamp, a protection and recess and / or a clip. In the illustrated example the sawhorse trestle 100 comprising first locking means 115 to lock the position of the first platform portion 133 relative to the first upright 110, and second locking means 125 to lock the position of the second platform portion 135 relative to the second upright 120. In some examples, the first locking means 115 is configured to lock the position of the first platform portion 133 relative to the first upright 110 in a plurality of positions. In some examples, the second locking means 125 is configured to lock the position of the second platform portion 135 relative to the second upright 120 in a plurality of positions. An example of a locking means 115, 125 is best shown in Figs 6a, 6b and 7. The illustrated sawhorse trestle 100 further comprises a fastening means 160 for fastening the first platform portion 133 to the second platform portion 135. A handle 161 may be used to control the fastening means 160. Figs 3a and 3b illustrate a third example of a sawhorse trestle 100 according to embodiments of the disclosure. Fig. 3a shows the sawhorse trestle 100 in a state where the opening 140 is closed. Fig. 3b shows the sawhorse trestle 100 in a state where the opening 140 is open. Figs 4 to 7 shows portions of the third example of a sawhorse trestle 100. The third example of a sawhorse trestle 100 may comprise some or all of the features of the first and second examples of a sawhorse trestle 100. The third example of a sawhorse trestle 100 is similar to the second example of a sawhorse trestle 100 with some differences. In the illustrated example, the first upright 110 and second upright 120 are half trestles. The illustrated first upright 110 and second upright 120 are A frames. The first upright 110 comprises two legs 112 which are pivotally connected, and the second upright 120 comprises two legs 122 which are pivotally connected. Each of the example first and second uprights 110, 120, comprise afolding bracket / strut 113, 123 which can lock the position of the legs 112. In other examples the legs 112 might be connected by chains or cords. In the illustrated example, when in use the legs 112, 122 are not completely perpendicular to the ground. Nevertheless, a pair of legs 112,122 still forms an upright 110, 120. An upright 110, 120 does not need to be completely perpendicular to the ground to be an upright 110, 120. Figs 4a and 4b illustrate cross sectional views of part of the third example of a sawhorse trestle 100. Fig. 4c illustrates a perspective view of part of the third example of a sawhorse trestle 100. Figs 4a to 4c show the second platform portion 135 and a first part of the fastening means 160. Fig. 5 illustrates a view of a different part of the third example of a sawhorse trestle 100. Fig. 5 shows the first platform portion 133 and a second part of the fastening means 160. The fastening means 160 is for fastening the first platform portion 133 to the second platform portion 135. The illustrated fastening means 160 comprises a rod 162 which runs through the second platform portion 135, and an aperture 170 in the first platform portion 133 for receiving a portion of the rod 162. A handle or knob 161 may be used to control the fastening means 160. The illustrated second platform portion 135 comprises a channel 163 for the rod 162. In some examples, the rod 162 comprises a protrusion 165 at or near the end of the rod 162, where the protrusion 165 is substantially perpendicular to the axial direction of the rod 162. The protrusion 165 may be considered to be a pin 165. The first platform portion 133 comprises a primary aperture 171 for receiving the portion of the rod 162, and a secondary aperture 172 for receiving the protrusion 165. In the illustrated example the rod 162 comprises two protrusions 165 and the first platform portion 133 comprises two secondary apertures 172. The illustrated primary and secondary apertures 171, 172 are contiguous and together form the aperture 170. In some examples, the fastening means 160 comprises a biasing means 166 to bias the rod 162 into the primary aperture 171. In the illustrated example this biasing means 166 comprises a spring 166. This helps to ensure the first platform portion 133 and second platform portion 135 stay fastened together. In the illustrated example the rod 162 is rotatable and the fastening means 160 is configured such that in a first position the protrusion 165 is aligned with the secondary aperture 172 and can pass though the secondary aperture 172. After the protrusion 165 passes through with the secondary aperture 172 the rod 162 can be rotated to a second position the protrusion 165 is not aligned with the secondary aperture 172 and cannot pass though the secondary aperture 172. This causes the first platform portion 133 and second platform portion 135 to be fastened together. This process is reversed to separate the first platform portion 133 and second platform portion 135. In some examples the fastening means 160 comprises a second biasing means 173 to bias the protrusion 165 into a position where not it is aligned with secondary aperture 172. In the illustrated example this biasing means 173 comprises a cam I ramp 173 on which the protrusion(s) 165 can slide. This makes it harder to accidentally pull the rod 162 out of the aperture 170 and so helps to ensure the first platform portion 133 and second platform portion 135 stay fastened together. In some example the fastening means 160 comprises a stop 174 that is configured to contact the protrusion 165 to stop further rotation of the rod 162. The edge of the stop 174 is aligned with the secondary aperture 172 making it easier for a user to pull the protrusion 165 through the secondary aperture 172 and so pull the rod 162 out of the aperture 170, thus separating the first platform portion 133 and second platform portion 135. The stop 174 is positioned on the opposite side of the secondary aperture 172 to the secondary platform portion 135. In the illustrated example there are two stops 174, one for each protrusion 165. In some examples the second platform portion 135 comprises location tab(s) 167, and the first platform portion 133 comprises location space(s) 177 configured to receive the location tab(s) to assist in location and connection of the first platform portion 133 and second platform portion 135. The illustrated first platform portion 133 and second platform portion 135 each comprises a groove 192 for rails of the first upright 110 and second upright 120. In the illustrated examples, the grooves 192 align to form a single groove 192 when the first platform portion 133 and second platform portion 135 are connected. Figs 6a and 6b illustrate part of the third example of a sawhorse trestle 100. Figs 6a and 6b show the second platform portion 135, the second upright 120 and a locking means 125. In Fig. 7 the second upright 120 has been removed to allow the locking means 125 to be seen. In the third example of a sawhorse trestle 100 as seen in Figs 3a and 3b a first locking means 115, and a second locking means 125 are present, where the first locking means 115 is configured to lock the position of the first platform portion 133 relative to the first upright 110, and the second locking means 125 is configured to lock the position of the second platform portion 135 relative to the second upright 120. In this example the first and second locking means 115, 125 are similar to each other, and are substantially identical. In other examples they may be different. In other examples, only one locking means 115, 125 is present and the single locking means 115, 125 is configured to lock the position of the platform 130 relative to the first upright 110 and / or the second upright 120. In the illustrated example, the second upright 120 comprises a rail 191 and the second platform portion 135 comprises a groove 192 for the rail 191 so that the second platform portion 135 is able to slide on the rail 191 to adjust the size of the opening 140. The illustrated groove 192 runs along the length of the second platform portion 135. The illustrated locking means 125 comprises a member 182 positioned inside the groove 192. The locking means 125 is configured such that when the locking means 125 is in an unlocked configuration the member 182 exhibits lower force on a side 194 of the groove 192 allowing the second platform portion 135 to move relative to the rail 191. When the locking means 125 is in a locked configuration the member 182 exhibits a higher force on the side 194 of the groove 192, resisting movement of the second platform portion 135 relative to the rail 191. In the locked configuration the member 182 is pulled towards the side 194 of the groove 192, increasing friction, whilst in the unlocked configuration the member 182 is not pulled towards the side 194 of the groove 192 and so friction is relatively low, thus allowing movement. The member 182 may be considered to be a resisting member 182. In the example of Fig. 7 the locking means 125 comprises a connector 183 connected to the member 182. Movement of the connector 183 causes movement of the member 182 which causes the locking means 125 to switch between the locked and unlocked configurations. In the illustrated example the rail 191 comprises a gap 193 for the connector 183, and the connector 183 extends through the gap 193. The illustrated locking means 125 also comprises a handle 181 and a cam 184, wherein the cam 184 is coupled to the handle 181 and the connector 183. The cam 184 is configured to convert rotational movement of the handle 181 to translational movement of the connector 183, and thus translational movement of the member 182. This allows rotating the handle 181 to change between the locked and unlocked states. In other examples the locking means 125 may comprise different elements. For example, the locking means 125 might not comprise a handle 181 or cam 184. In some situations a single sawhorse trestle 100 may be used to support a workpiece. In other examples, multiple sawhorse trestles 100 may be used which together may be considered to form a sawhorse 800. Fig. 8 illustrates an example of a sawhorse 800 according to embodiments of the disclosure. Figs 9a and 9b illustrate views of part of the example of a sawhorse 800 of Fig. 8. The sawhorse comprises a first sawhorse trestle 100a and a second sawhorse trestle 100b. The sawhorse trestles 100a, 100b are positioned so that their openings 140a, 140b are aligned and so that a workpiece positioned on the sawhorse trestles 100a, 100b can have a single continuous cut made along its length. The illustrated first and second sawhorse trestles 100a, 100b each correspond to the third example of a sawhorse trestle 100 as shown in Figs 3a to 7. In other examples, the first and / or second sawhorse trestles 100a, 100b may be the first or second examples of a sawhorse trestle 100 as shown in Figs 1a, and 1b and Figs 2a and 2b. In other examples, the first and / or second sawhorse trestles 100a, 100b may be a different form of sawhorse trestle 100. In the illustrated example, the illustrated firstand second sawhorse trestles 100a, 100b are substantially identical, in other examples they may be different to one another. In some examples, the sawhorse 800 comprises a connecting platform 810 that is configured to be detachably connected to the first trestle 100a and the second trestle 100b to connect the first trestle 100a to the second trestle 100b. In the illustrated example two connecting platforms 810a, 810b are present, but in other examples there may be a different number present, such as only one connecting platform 810. The connecting platform 810 helps to support the workpiece and connects the first trestle 100a to the second trestle 100b, improving stability. The first sawhorse trestle 100a provides a first support surface 131a, the second sawhorse trestle 100b provides a second support surface 131b, and the connecting platform 810 provides a third support surface 811. Each of the supporting surfaces 131, 810, are for supporting the workpiece and may be for supporting the workpiece simultaneously. The first, second and third support surfaces 131, 810 are at substantially the same height, which helps them to do so. In the illustrated example, the connecting platform 810 is hinged to allow it be folded. The illustrated connecting platform 810 is substantially bar shaped, in other examples it may be a different shape. The illustrated connecting platforms 810a, 810 are configured to be positioned perpendicularly to the openings 140, thus allowing a single continuous cut to be made along a supported workpiece. In some examples, the connecting platform 810 is positionable along the length of the first sawhorse trestle 100a and / or the second sawhorse trestle 100b. The connecting platform 810 may be repositioned to better support different workpieces. In some examples, the connecting platform 810 is slidable along the length of the first sawhorse trestle 100a and / or the second sawhorse trestle 100b. As best seen in Figs 9a and 9b, the illustrated connecting platform 810 comprises a projection I peg I hook 813 and the platform I platform portion 130, 133, 135 comprise a groove 138 for receiving the hook 813. The illustrated groove 138 is on the side of the platform I platform portion 130, 133, 135. The hook 813 may slide along the length of the groove 138 thus allowing the position of the connecting platform 810 relative to the platform 130 to be changed. The illustrated groove 138 runs along the length of the platform I platform portion 130, 133, 135 and so the connecting platform 810 is repositionable along this length. As seen best in Fig 8 the connecting platform 810 comprises a projection I peg I hook 813 at either end, allowing the connecting platform 810 to connect to both trestles 100a, 100b at the same time, and to be easily repositionable relative to both trestles 100a, 100b at the same time. The connecting platform 810 can also be repositioned even when it is supporting a workpiece. In other examples the connecting platform 810 can connect to the platform I platform portion 130, 133, 135 via a different mechanism, such as a pin of the connecting platform 810 and a series of holes in the platform I platform portion 130, 133, 135. In some examples there is a method comprising: providing a first upright 110; providing a second upright 120; and providing a platform 130 comprising a support surface 131, wherein the platform 130 is supported by the first upright 110. The platform 130 is movable relative to the first upright 110 and the second upright 120 in order to adjust the size of an opening 140. A first direction is defined by a direction from the first upright 110 to the second upright 120. The opening 140 is open on both sides in a direction substantially perpendicular to the first direction. A sawhorse 800, or sawhorse trestle 100 may be constructed of any suitable materials, for example wood or metal (such as aluminium or steel) or plastics material. Polymeric plastic materials may be used by any of a wide variety of moulding processes. For example injection moulding (using such materials as Acrylonitrile-ButadieneStyrene (ABS), Nylon (PA), Polycarbonate (PC), Polypropylene (PP) and Polystyrene (GPPS)); extrusion blow moulding (using such materials as Polypropylene (PP), Polyethylene (PE), Polyethylene-Terephthalate (PET) and Polyvinyl chloride (PVC)); and extrusion profile moulding (using materials like high-density polyethylene (HDPE), polyvinyl chloride (PVC) and polytetrafluoroethylene (PTFE)-filled PVC). Glass-reinforced plastics made by, for example, resin transfer moulding may also be used with any of a wide range of resin systems including polyester, vinylester, epoxy, phenolic and methyl methacylates. According to various, but not necessarily all, examples there is provided a sawhorse 800 comprising: a first trestle 100a providing a first support surface 131a; a second trestle 100b providing a second support surface 131b; and a connecting platform 810 providing a third support surface 811; wherein the connecting platform 810 is configured to be detachably connected to the first trestle 100a and the second trestle 100b to connect the first trestle 100a to the second trestle 100b, and wherein the first, second and third support surfaces 131a, 131b, 811 are substantially the same height. According to various, but not necessarily all, examples there is provided an apparatus comprising: a first member 133, a second member 135, and fastening means 160 to lock the first member 133 and second member 135 together, wherein the fastening means 160 comprises: a rod 162 which runs through the first member 133, wherein the rod 162 comprises a protrusion 165 at or near the end of the rod 162 which is substantially perpendicular to the axial direction of the rod 162, and a primary aperture 171 and a secondary aperture 172 in the second member 135, wherein the primary aperture 171 is for receiving a portion of the rod 162, and the secondary aperture 172 is for receiving the protrusion 165, wherein the rod 162 is rotatable and the fastening means 160 is configured such that in a first position the protrusion 165 is aligned with the secondary aperture 172 and can pass though the secondary aperture 172, and if the rod 162 is rotated to a second position the protrusion 165 is not aligned with the secondary aperture 172 and cannot pass though the secondary aperture 172, fastening I locking the first member 133 and second member 135 together. According to various, but not necessarily all, examples there is provided an apparatus comprising: a first member 110 comprising a rail 191, a second member 130 comprising a groove 192 for the rail 191, and locking means 125 to lock the position of the first member 110 relative to second member 130, wherein the second member 130 is configured to slide along the rail 191, wherein the locking means 125 comprises a resisting member 182 positioned inside the groove 192, wherein in an unlocked configuration the resisting member 182 exhibits a lower force on a side 194 of the groove 192 allowing the second member 130 to move relative to the first member 110, and in a locked configuration the resisting member exhibits a higher force on a side 194 of the groove 192 resisting movement of the second member 130 relative to the first member 110. Where a structural feature has been described, it may be replaced by means for performing one or more of the functions of the structural feature whether that function or those functions are explicitly or implicitly described. The term ‘comprise’ is used in this document with an inclusive not an exclusive meaning. That is any reference to X comprising Y indicates that X may comprise only one Y or may comprise more than one Y. If it is intended to use ‘comprise’ with an exclusive meaning then it will be made clear in the context by referring to ‘comprising only one...’ or by using ‘consisting.’ In this description, the wording ‘connect’, ‘couple’ and ‘communication’ and their derivatives mean operationally connected / coupled / in communication. It should be appreciated that any number or combination of intervening components can exist (including no intervening components), i.e., to provide direct or indirect connection / coupling / communication. Any such intervening components can include hardware and / or software components. In this description, reference has been made to various examples. The description of features or functions in relation to an example indicates that those features or functions are present in that example. The use of the term ‘example’ or ‘for example’ or ‘can’ or ‘may’ in the text denotes, whether explicitly stated or not, that such features or functions are present in at least the described example, whether described as an example or not, and that they can be, but are not necessarily, present in some of or all other examples. Thus ‘example’, ‘for example’, ‘can’, or ‘may’ refers to a particular instance in a class of examples. A property of the instance can be a property of only that instance or a property of the class or a property of a sub-class of the class that includes some but not all the instances in the class. It is therefore implicitly disclosed that a feature described with reference to one example but not with reference to another example, can where possible be used in that other example as part of a working combination but does not necessarily have to be used in that other example. Although examples have been described in the preceding paragraphs with reference to various examples, it should be appreciated that modifications to the examples given can be made without departing from the scope of the claims. Features described in the preceding description may be used in combinations other than the combinations explicitly described above. Although functions have been described with reference to certain features, those functions may be performable by other features whether described or not. The description of a feature, such as an apparatus or a component of an apparatus, configured to perform a function, or for performing a function, should additionally be considered to also disclose a method of performing that function. For example, description of an apparatus configured to perform one or more actions, or for performing one or more actions, should additionally be considered to disclose a method of performing those one or more actions with or without the apparatus. Although features have been described with reference to certain examples, those features may also be present in other examples whether described or not. The term ‘a’, ‘an’ or ‘the’ is used in this document with an inclusive not an exclusive meaning. That is any reference to X comprising a / an / the Y indicates that X may comprise only one Y or may comprise more than one Y unless the context clearly indicates the contrary. If it is intended to use ‘a’, ‘an’ or ‘the’ with an exclusive meaning then it will be made clear in the context. In some circumstances the use of ‘at least one’ or ‘one or more’ may be used to emphasis an inclusive meaning but the absence of these terms should not be taken to infer any exclusive meaning. The presence of a feature (or combination of features) in a claim is a reference to that feature or (combination of features) itself and to features that achieve substantially the same technical effect (equivalent features). The equivalent features include, for example, features that are variants and achieve substantially the same result in substantially the same way. The equivalent features include, for example, features that 19 perform substantially the same function, in substantially the same way to achieve substantially the same result. In this description, reference has been made to various examples using adjectives or adjectival phrases to describe characteristics of the examples. Such a description of a characteristic in relation to an example indicates that the characteristic is present in some examples exactly as described and is present in other examples substantially as described. The above description describes some examples of the present disclosure however those of ordinary skill in the art will be aware of possible alternative structures and method features which offer equivalent functionality to the specific examples of such structures and features described herein above and which for the sake of brevity and clarity have been omitted from the above description. Nonetheless, the above description should be read as implicitly including reference to such alternative structures and method features which provide equivalent functionality unless such alternative structures or method features are explicitly excluded in the above description of the examples of the present disclosure. Whilst endeavoring in the foregoing specification to draw attention to those features believed to be of importance the Applicant may seek protection via the claims in respect of any patentable feature or combination of features hereinbefore referred to and / or shown in the drawings whether or not emphasis has been placed thereon. l / we claim:

Claims

1. A sawhorse trestle comprising:a first upright;a second upright; anda platform comprising a support surface, wherein the platform is supported by the first upright;wherein the platform is movable relative to the first upright and the second upright in order to adjust the size of an opening;wherein a first direction is defined by a direction from the first upright to the second upright, and wherein the opening is open on both sides in a direction substantially perpendicular to the first direction.

2. The sawhorse trestle of claim 1, wherein the opening is positioned between the first and second uprights.

3. The sawhorse trestle of claim 1 or 2, wherein the platform is configured to move in a direction substantially parallel to the first direction.

4. The sawhorse trestle of claim 1,2 or 3, wherein the sawhorse trestle is configured such that movement of the platform adjusts the opening without movement of the first upright or the second upright.

5. The sawhorse trestle of any of the preceding claims, wherein the sawhorse trestle further comprises a connection means that fixedly connects the first upright to the second upright.

6. The sawhorse trestle of any of the preceding claims, wherein the first upright and second upright are half trestles.

7. The sawhorse trestle of any of the preceding claims, wherein the platform is configured to slide relative to the first upright and the second upright in order to adjust the size of the opening.

8. The sawhorse trestle of any of the preceding claims, wherein the platform is substantially horizontal and the support surface is a top surface for supporting a work piece.

9. The sawhorse trestle of any of the preceding claims, further comprising locking means to lock the position of the platform relative to the first upright and / or the second upright.

10. The sawhorse trestle of claim 9, wherein the locking means is configured to lock the position of the platform relative to the first upright and / or the second upright in a plurality of positions.

11. The sawhorse trestle of claim 9 or 10, wherein the first upright comprises a rail, the platform comprises a groove for the rail and the platform is configured to slide on the rail.

12. The sawhorse trestle of claim 11, wherein the locking means comprises a member positioned inside the groove, wherein the locking means is configured such that when the locking means is in an unlocked configuration the member exhibits lower force on a side of the groove allowing the platform to move relative to the rail, and when the locking means is in a locked configuration the member exhibits a higher force on a side of the groove, resisting movement of the platform relative to the rail.13 The sawhorse trestle of claim 12, wherein the locking means further comprises a connector connected to the member, wherein movement of the connector causes movement of the member which causes the locking means to switch between the locked and unlocked configurations.

14. The sawhorse trestle of claim 13, wherein the locking means further comprises a handle and a cam, wherein the cam is coupled to the handle and the connector, wherein the cam is configured to convert rotational movement of the handle to translational movement of the connector, and thus translational movement of the member.

15. The sawhorse trestle of any of the preceding claims, wherein the platform comprises:a first platform portion comprising a first support surface, anda second platform portion comprising a second support surface;wherein the support surface comprises the first support surface and the second support surface; andwherein the first platform portion is supported by the first upright and the second platform portion is supported by the second upright.

16. The sawhorse trestle of claim 15, wherein the first platform portion is configured to move relative to the first upright, and the second platform portion is configured to move relative to the second upright in order to adjust the size of the opening.

17. The sawhorse trestle of claim 15 or 16, wherein the opening is between the first platform portion and the second platform portion.

18. The sawhorse trestle of any of claims 15 to 17, further comprising a fastening means for fastening the first platform portion to the second platform portion, wherein the fastening means comprises a rod which runs through the second platform portion, and an aperture in the first platform portion for receiving a portion of the rod.

19. The sawhorse trestle of claim 18, wherein the rod comprises a protrusion at or near the end of the rod which is substantially perpendicular to the axial direction of the rod, and the first platform portion comprises a primary aperture for receiving the portion of the rod, and a secondary aperture for receiving the protrusion.

20. The sawhorse trestle of claim 19, wherein the rod is rotatable and the fastening means is configured such that in a first position the protrusion is aligned with the secondary aperture and can pass though the secondary aperture, and the fastening means is configured such that if the rod is rotated to a second position the protrusion is not aligned with the secondary aperture and cannot pass though thesecondary aperture, so fastening the first platform portion and second platform portion together.

21. The sawhorse trestle of claim 19 or 20, wherein the fastening means further comprises a biasing means to bias the rod into the primary aperture.

22. The sawhorse trestle of any of claims 19, 20 or 21, wherein the fastening means further comprises a biasing means to bias the protrusion into a position where it is not aligned with secondary aperture.

23. A sawhorse comprising:a first sawhorse trestle according to any of claims 1 to 22,a second sawhorse trestle, anda connecting platform, wherein the connecting platform is configured to be detachably connected to the first trestle and the second trestle to connect the first trestle to the second trestle.

24. The sawhorse of claim 23, wherein the first sawhorse trestle provides a first support surface, the second sawhorse trestle provides a second support surface, and the connecting platform provides a third support surface, wherein the first, second and third support surfaces are substantially the same height.

25. The sawhorse of claim 23 or 24, wherein the connecting platform is positionable along the length of the first sawhorse trestle.A

Images