Guide arrangement for aligning a workpiece on a table of a saw device

Abstract

A guide assembly for a sawing device comprises a pre-tensioning mechanism located at one end and a sliding mechanism located at the other end. The sliding mechanism establishes two fixed contact points between the guide assembly and a guide rail of the sawing device. The pre-tensioning mechanism establishes a third contact point between the guide assembly and another guide rail of the sawing device. The guide assembly has an unlocked state in which the pre-tensioning mechanism continuously generates a first clamping force on the sawing device between the third contact point and the two fixed contact points. This first clamping force automatically aligns the guide assembly with the sawing device and allows for sliding adjustment of the guide assembly on the sawing device.The guide assembly has a locked state in which a second clamping force is generated between the contact points and the guide assembly is fixed on the saw device.

Description

AREA

[0001] The disclosure relates generally to power tools and in particular to material guides or stops for a sawing device that precisely introduce material into and through a cutting instrument. BACKGROUND

[0002] Unless otherwise stated herein, the materials described in this section are not the prior art prior to the claims in this application and are not recognized as prior art by their inclusion in this section.

[0003] To assist users in making precise cuts, many sawing devices are designed to accommodate parallel stops, also known as material guides or guide arrangements. Fig. Figure 13 shows a sawing device in the form of a table saw, which has a known parallel fence. 30 features the table saw 10 has a base 12 on, which is a case14 wears. The case 14 houses an electric motor with a shaft on which a cutting tool, usually a blade, is mounted. 16 , is attached for rotation. A planar surface, usually referred to as a table 18 The name is located on the top of the case. 14 attached. The table 18 It typically consists of a rigid and flat material, such as metal, plastic, or fiberglass. The blade 16 protrudes through an opening 20 in the surface of the table 18 A first stop guide or rail 22 is at the front of the table 18 arranged and a second stop guide or rail 25 is on the back side of the table 18 arranged. The guided tours 22 , 24 can be part of the table 18They can be formed or they can be separate parts, each attached to the table at the appropriate place. 18 be connected.

[0004] The parallel stop 30 has a clamping system with a first clamping mechanism 32 and a second clamping mechanism 34 , which are selectively movable between a clamped position and a non-clamped position. In the clamped position, the first and second clamping mechanisms engage. 32 , 34 the guided tours 22 , 24 in such a way that the attack 30 regarding the blade 16 and the table 18 It is fixed in place. In the unclamped position, the first and second clamping mechanisms release. 32 , 34 completely from the guided tours 22 , 24 , so that the parallel stop 30It can rotate freely along the table surface. The guides 22 , 24 are made of a rigid material, such as metal or plastic. The guides 22 , 24 They typically have grooves or other geometric structures that allow the parallel stop to 30 simply on the surface of the table 18 which can be attached and removed, and which also allow the stop to be 30 over the surface of the table 18 slides to be operated by an operator or user of the table saw 10 to be positioned.

[0005] While clamping systems, such as the one with reference to Fig. While users of the parallel fence described in section 13 can adequately attach it to the table, some find that the fence's position can shift out of alignment when clamped. If the fence moves during clamping, the clamped position causes the material to be cut along a different line than intended. This shift can lead to an inaccurate position and angle for the parallel fence, resulting in an imprecise and unsafe cut. Another problem with these known parallel fences is that, due to insufficient preload and loss of contact between the fence and the guides, the fence can rattle or jam against the table guides when adjusting its position.A similar rattling, jamming and / or slipping may occur if the user moves these known parallel stops from their rear end.

[0006] Given the above, it would be advantageous to provide a rip fence for a table saw, as the rip fence ensures increased accuracy when cutting the material. It would also be beneficial if the rip fence could automatically align itself to the table while its position is adjusted along the table surface. Furthermore, it would be advantageous if the rip fence remained in its desired position when clamped to the table. SUMMARY

[0007] According to one embodiment of the present disclosure, a guide arrangement for aligning a workpiece on the table of a table saw is provided. The guide arrangement comprises an alignment element having a first end and a second end spaced apart from the first end, a sliding mechanism arranged at the first end of the alignment element, wherein the sliding mechanism has two sliding contacts spaced apart on both sides of the alignment element along a sliding axis, and a preloading mechanism arranged at the second end of the alignment element, wherein the preloading mechanism has a third contact that is movably preloaded with respect to the two sliding contacts and is arranged between the two sliding contacts with respect to the sliding axis, wherein the preloading mechanism is designed to continuously generate a first clamping force on the table between the third contact and the two sliding contacts.wherein the first clamping force allows a sliding adjustment of the guide arrangement along the sliding axis, and wherein the preload mechanism is further designed to selectively generate a second clamping force on the table between the third contact and the two sliding contacts, wherein the second clamping force fixes a position of the guide arrangement along the sliding axis.

[0008] In another embodiment, the guide arrangement comprises an alignment element having a first end and a second end spaced apart from the first end, a sliding mechanism arranged at the first end of the alignment element, wherein the sliding mechanism has a pivotable locking element and two sliding contacts spaced apart on both sides of the alignment element along a sliding axis, and a preloading mechanism arranged at the second end of the alignment element, wherein the preloading mechanism has a third contact that is movably preloaded relative to the two sliding contacts and is arranged between the two sliding contacts along the sliding axis, wherein the preloading mechanism is designed to continuously generate a first clamping force on the table between the third contact and the two sliding contacts.wherein the first clamping force pulls the two sliding contacts into contact with the table and allows a sliding adjustment of the guide arrangement along the sliding axis, and wherein the preload mechanism for generating a second clamping force on the table is designed between the locking element and the two sliding contacts, wherein the second clamping force fixes a position of the guide arrangement on the table along the sliding axis. List of characters Fig. Figure 1 is a top view of a table saw with a parallel fence according to a first embodiment, wherein the parallel fence has a pre-tensioning mechanism and a sliding mechanism for generating a clamping force on the table saw. Fig. Figure 2 is a side view of the table saw and the parallel fence. Fig. 1. Fig. Figure 3 is a front perspective view of the parallel stop from Fig. 1, wherein two contacts of the sliding mechanism are in contact with a rail of the table saw. Fig. Figure 4 is a rear and front perspective view of the parallel stop. Fig. 1, wherein a contact of the pretensioning mechanism is in contact with a rail of the table saw. Fig. Figure 5 is a sectional view of the table saw and the parallel fence. Fig. 1 along line A-A . Fig. Figure 6 is a front perspective view of a table saw with a parallel fence according to a second embodiment, wherein the parallel fence has a pre-tensioning mechanism and a sliding mechanism for generating a clamping force on the table saw. Fig. 7 is a sectional view of the parallel fence made of Fig. 6 along line B-B . Fig. Figure 8 is an enlarged view of the preloading mechanism. Fig. 7. Fig. Figure 9 is a top view of a table saw with a parallel fence according to a third embodiment, wherein the parallel fence has a pre-tensioning mechanism and a sliding mechanism for generating a clamping force on the table saw. Fig. 10 is a side view of the table saw and the parallel fence made of Fig. 9. Fig. Figure 11 is an enlarged sectional view of the preload mechanism of the parallel stop. Fig. 9 along line C-C . Fig. Figure 12 is an enlarged sectional view of the sliding mechanism of the parallel stop. Fig. 9 along line C-C . Fig. Figure 13 is a perspective view of a table saw with a known parallel fence. DESCRIPTION

[0009] For the purpose of promoting an understanding of the principles of the disclosure, reference is now made to the embodiments illustrated in the drawings and described in the following written specification. It is understood that this is not intended to limit the scope of the disclosure. It is further understood that the disclosure includes any changes and modifications to the embodiments shown and further applications of the principles of the disclosure, such as would normally occur to a person skilled in the art in the field to which this disclosure relates.

[0010] Fig. Figures 1-4 show a guide arrangement 160 according to a first embodiment. The guide arrangement shown 150 is on a sawing device 100 with a table 102 arranged. The sawing device shown in the figures is a table saw. 100, but in other embodiments the sawing device can be designed as a different type of cutting tool, using a guide arrangement to position a workpiece on a surface relative to a cutting blade. The table 102 defines a planar surface 104 to support a (not shown) workpiece and has an opening 106 ( Fig. 1) through which a blade (not shown) protrudes. The blade establishes a cutting direction. 108 the table saw 100 firmly.

[0011] The table 102 has two stop guides or rails 110 , 112 on, which are designed to carry out the guidance arrangement 150 to orient oneself regarding the blade when it is on the table 102 are appropriate. A first guided tour 110 is at the front of the table 102 arranged and a second guide 112is on the back side of the table 102 arranged. The guided tours 110 , 112 are in some embodiments as part of the table 102 formed. In other embodiments, the guides are 110 , 112 separate parts, each attached to the table at the appropriate place 102 are connected. The guided tours 110 , 112 are made of a rigid material, such as metal or plastic. The shape of the guides 110 , 112 allows for easy attachment and removal of the guide assembly 150 on it or of it. The form of the guided tours. 110 , 112 permits the leadership order 150 also, across the surface 104 of the table 102 to slide in order to be positioned by an operator or user of the table saw.

[0012] The guided tours 110 , 112In the illustrated embodiment, the guides have a continuous outer surface, meaning that the outer surface is free of grooves or cavities, as are typical for known guides. The outer surface has a planar top surface. 114 to support a weight of the guide arrangement 150 and a planar side surface 116 on, at which the leadership order 150 is clamped in order to secure the guide arrangement 150 at the table 102 to attach the top. 114 is essentially parallel to the surface 104 oriented towards the table. The side surface 116 in some embodiments is essentially normal to the cutting direction 108 oriented, but in other embodiments the side surface 116 a negative angle. As used here, a face with a negative angle means that the face 116a planar orientation that provides a cooperating surface for the guide arrangement 150 subjected to a downward force when the guide arrangement 150 on the guided tours 110 , 112 of the table 102 is arranged. The applied downward force is designed to cause other surfaces of the guide arrangement to 150 downwards against other surfaces of the table 102 and the guided tours 110 , 112 be pressed. An inner region of the guides 110 , 112 The guides can be hollow or have any structure that improves the manufacturability, strength, and / or durability of the guides. 110 , 112 cross the width of the table 102 and define a sliding axis 118 , which are essentially perpendicular to the cutting direction 108the blade. The guide arrangement 150 is with respect to the blade along the sliding axis 118 positionable.

[0013] Fig. Figure 5 shows a sectional view of the guide arrangement. 160 on the table 102 along line A-A in Fig. 1. The leadership order 150 features an alignment element 152 , a sliding mechanism 154 , which is located at a first end of the alignment element 152 is arranged, and a pre-tensioning mechanism 158 on, which is located at a second end of the alignment element 152 is arranged. The alignment element 152 is designed to hold the workpiece on the table 102 to guide and the sliding mechanism 154 and the preload mechanism 158 to arrange themselves in relation to each other. The alignment element 152It consists of a channel element or profile which, in some embodiments, defines an interior space for receiving or positioning other elements of the guide assembly. The alignment element 152 has side sections 162 , 164 on ( Fig. 2-4), each defining a substantially planar guide surface for guiding the workpiece. The side section 164 Generally, it abuts the workpiece to be cut by the blade. If the guide arrangement 150 With respect to the blade, the planar guide surface of the side section is precisely arranged. 164 essentially parallel to the cutting direction 108 the blade to provide precise cutting of the workpiece.

[0014] How best to Fig. As can be seen in section 3, the sliding mechanism 154 a case 166 with a housing section 168 and a flange section 170up. The housing section 168 is connected to the first end of the alignment element 152 connected. The flange section 170 is with the housing section 168 connected and extends on both sides with respect to the alignment element 152 along the sliding axis 118 The housing section 168 and the flange section 170 are with regard to the alignment element 152 fixed to ensure the alignment of the alignment element 152 regarding the blade via the sliding mechanism 154 to be determined. The sliding mechanism 154 It also features two sliding contacts. 172 , 174 on, which are on both sides of the alignment element 152 along the sliding axis 118 are spaced apart. The sliding contacts 172 , 174 In the illustrated embodiments, next to the ends of the flange section are 170, but in other embodiments the sliding contacts 172 , 174 from the ends of the flange section 170 be arranged inwards. In one embodiment, the sliding contacts are 172 , 174 arranged at the same distance from a plane normal to the sliding axis on both sides 118 is oriented and through a center of the alignment element 152 proceeds.

[0015] How best to Fig. 2, Fig. 3 and Fig. As can be seen in section 5, the sliding contacts are 172 , 174 separate from the flange section 170 shaped and attached directly to the flange section with a fastener, adhesive or the like 170 attached. The sliding contacts 172 , 174 They can be made of a polymer material, such as ultra-high molecular weight polyethylene (UHMW) or Delrin®. In other embodiments, the sliding contacts 172 ,174 from the flange section 170 defined so that the sliding contacts are made of the material of the flange section 170 be formed in one piece. Referring to Fig. 2 and Fig. The sliding contacts are 5. 172 , 174 each one planar underside 176 and a planar one, attached to the underside 175 adjacent side surface 178 open. The subpages 176 the sliding contacts 172 , 174 are essentially parallel to the upper surfaces 114 the guided tours 110 , 112 oriented. The orientation of the side surfaces 178 the sliding contacts 172 , 174 This essentially corresponds to the orientation of the side surfaces. 116 the guided tours 110 , 112 The sliding contacts 172 , 174 establish two clear contact points between the command order 150 and appropriate leadership 110 ,112 of the table 102 fixed to ensure the alignment of the command order 150 to facilitate the blade. The sliding mechanism 154 according to the first embodiment of the guide arrangement 150 is on one side of the table 102 arranged so that two sliding contacts 172 , 174 with the leadership 110 work together, which benefit the user of the table saw 100 nearest.

[0016] The preload mechanism 158 has a lever 180 on, which is pivotable at one end on a pivot pin 182 is attached, which is located next to the second end of the alignment element. 152 is located. A third contact 184 is at the other end of the lever 180 arranged. The lever 180 is designed to facilitate third contact 184 around the pivot 182 to the two sliding contacts 172 , 174to turn the lever 180 In the illustrated embodiment, the third contact rotates 184 in a plane normal to the sliding axis 118 In other embodiments, the lever rotates. 180 the third contact 184 in planes that have a different orientation than one relative to the sliding axis 118 normal level. How best to in Fig. As can be seen in step 1, the lever is positioned. 180 the third contact 184 with respect to the sliding axis 118 between the two sliding contacts 172 , 174 In at least one embodiment, the contact point of the third contact is 184 on the table 102 aligned to a plane normal to the sliding axis 118 is oriented and through a center of the alignment element 152 The process. The positions of the two sliding contacts 172 , 174 and the third contact 184 against the side surfaces 116the guided tours 110 , 112 form a triangle with points at the 1 , 2 and 3 , as shown schematically in Fig. 1 can be seen. The preload mechanism 158 according to the first embodiment of the guide arrangement 150 is on one side of the table 102 arranged so that the third contact 184 with the side surface 116 the leadership 112 works together, which is provided by the user of the table saw 100 is furthest away.

[0017] Referring to Fig. 4 and Fig. 5 indicates the leadership order 150 in one embodiment a sliding block 183 on, which is next to the second end of the alignment element 152 on a lower section of the alignment element 152 is arranged. The sliding block 183 is inwards from the preload mechanism 158arranged and has a planar underside 185 on, which are essentially parallel to the top 114 the leadership 112 is oriented. The sliding block 183 is to support a weight of the guide arrangement 150 on the tour 112 designed and provides low resistance to movement when the guide arrangement 150 along the sliding axis 118 is moved. In other embodiments, a bottom side of the alignment element supports it. 152 the weight of the guide arrangement 150 above the table 102 and provides low resistance to movement when the guide arrangement 150 along the sliding axis 118 is being moved.

[0018] Referring to Fig. The lever points to 5. 180 in one embodiment a first plate-shaped section 186 , which I from the pivot 182extends, and a second plate-shaped section 188 on, which is on the first plate-shaped section 186 is attached. The second plate-shaped section 188 has ribs or walls that reinforce the first plate-shaped section 186 are designed to resist bending under load. The second plate-shaped section 188 It also has a flange. 190 up, extending perpendicularly from the first plate-shaped section 186 extends and the third contact 190 with the preload mechanism 158 connects.

[0019] The third contact in the illustrated embodiment is a wheel. 184 , which is for rolling contact with the side surface 116 the leadership 112 is designed when the guide arrangement 150 along the sliding axis 118 is moved. The wheel 184 rotates around an axis of rotation that is located on the preload mechanism158 is formed, for example the axis of rotation 192 , which are attached to a fastening device 194 is trained to use the lever 180 is screwed in. As it says in Fig. As can be seen in section 5, the wheel 184 a spherical profile 196 , seen in a plane that is separated from the axis of rotation 192 of the wheel 184 It runs and is aligned with it. The spherical profile 196 allows freedom in the positioning angle of the axis of rotation 192 regarding the contact angle of the guides 110 , 112 , to prevent linear rolling during the movement of the guide assembly 150 along the sliding axis 118 to achieve.

[0020] The leadership order 150 It also features a rod system. 198 and a handle 200 up. The frame 198 brings the sliding mechanism 154 with the preload mechanism 158in operational connection. The handle 200 is with the case 166 the sliding mechanism 154 in operational connection and positionable between a first position and a second position. In the illustrated embodiment, the handle rotates. 200 regarding the housing 166 between the first position and the second position. The linkage. 198 has a first end, which is connected to the handle. 200 is in operational connection, so that movement of the handle 200 from the first position to the second position the linkage 198 in one direction towards the sliding mechanism 154 and from the preload mechanism 158 moved away. A movement of the handle. 200 The linkage moves from the second position to the first position. 198 in one direction from the sliding mechanism 154 away and to the preload mechanism 158 In one embodiment, the linkage 198designed as a pull bar and the handle 200 is designed as an eccentric mechanism.

[0021] The frame 198 runs through the lever 180 of the preload mechanism 158 at a point between the pivot 182 and the third contact 184 and the second end of the rod 198 extends outwards beyond the lever 180 The frame 198 features an adjustment device 202 up, which is connected to the second end of the rod 198 is connected. The adjustment device 202 is regarding the rod 198 adjustable along a length of the linkage. In the illustrated embodiment, the adjusting device has 202 an internal thread that corresponds to an external thread section on the linkage 198 next to the second end, the linkage. 198 It also features a pre-tensioning element 208up, which is between the adjusting device 202 and the lever 180 is arranged. In the illustrated embodiment, the preload element is a compression spring. 208 with spirals that secure the linkage 198 surrounded, designed. The adjustment device 202 In some embodiments, it has a cylindrical body section. 210 and a flange section 212 on, which is located at one end of the body section 210 is arranged. The flange section 212 has a diameter that is larger than the diameter of the body segment 210 is, so that one end of the spring 208 at the flange section 212 lies against the body section and the coils of the spring 210 surrounded. The prestressing element 208 is designed to increase the leverage 180 and the third contact 184 to the two sliding contacts 172 , 174 to pre-tension.

[0022] The leadership order 150 has an unlocked state, which corresponds to the first position of the handle. 200 corresponds to a locked state, which corresponds to the second position of the handle. 200 This corresponds to the first position of the handle. 200 has the pretensioning element 208 a first compression between the adjusting device 202 and the lever 180 , which the lever 180 and the third contact 184 movable relative to the two sliding contacts 172 , 174 pre-tensioned. If the guide arrangement 150 on the table 102 with the handle 200 When positioned in the first position, the preload mechanism generates 158 continuously applies an initial clamping force to the table between the third contact 184 and the two sliding contacts 172 , 174 The initial clamping force applies a constant preload or rest force to the guides. 110, 112 of the table 102 with sufficient force to correct any possible misalignment of the guide arrangement 150 regarding the blade and to ensure contact between the two sliding contacts 172 , 174 and the leadership 110 of the table 102 ready. If the leadership order 150 If subjected to a moment, the first clamping force would, for example, act as a corrective force to stabilize the guide arrangement. 150 to restore the right angle when the torque is reduced or removed. The initial clamping force also allows for a sliding adjustment of the guide arrangement. 150 along the sliding axis 118 The third contact 184 provides low resistance to further movement, thereby facilitating the movement of the guide assembly 150 across the table 102 It is made easier if the handle 200is in the first position.

[0023] If the lever 200 When the preload element is moved from the first position to the second position, it is moved. 208 from the first compression between the adjusting device 202 and the lever 180 further compressed. The force on the lever 180 during this initial movement of the handle 200 from the first position based on the properties of the prestressing element 208 taking into account the compression, spring constant, material and other properties of the preload element 208 to. The leadership order 150 is designed in such a way that the preload element 108Full compression is achieved when the handle is in an intermediate position between the first and second positions. As used here, "full compression" of the preload element means that the preload element cannot be compressed any further. Once the preload element 208 Full compression is achieved; a further turn of the handle leads to... 200 into the second position so that the force is applied to the linkage 198 directly onto the lever 180 This effect increases the force on the lever. 180 by further turning the handle 200 significantly increased.

[0024] The frame 198 In one embodiment, it has a spacer. 214 ( Fig. 5) on, which is located between the adjusting device 202 and the lever 180 is arranged. The spacer 214 is within the prestressing element 208nested and designed to fully compress the preload element 208 to prevent, if the handle 200 is rotated from the first position to the second position. The spacer 214 has a tolerance between the adjustment device 202 and the lever 180 , if the handle 200 is in the first position. The prestressing element 208 In this embodiment, there is also a first compression between the adjusting device. 202 and the lever 180 , if the handle 200 in the first position. The first compression of the preload element. 208 tensions the lever 180 and the third contact 184 movable relative to the two sliding contacts 172 , 174 before.

[0025] If the lever 200 In this embodiment, when the preload element is moved from the first position to the second position, it is moved. 208from the first compression between the adjusting device 202 and the lever 180 further compressed. The leadership arrangement 150 In this embodiment, the spacer is designed such that 214 the adjusting device 202 and the lever 180 touches when the handle is in an intermediate position between the first and second positions. In this intermediate position of the handle 200 The spacer prevents this 214 that the preload element 208 It has reached its full compression. Another turn of the handle. 200 Moving from the intermediate position to the second position results in the force being transferred to the linkage. 198 directly onto the lever 180 about the spacer 214 This effect increases the force on the lever. 180 by further turning the handle 200 significantly increased.

[0026] Referring again to Fig. 1-5 The following description concerns the leadership arrangement 150 with or without spacers 214 If the leadership order 150 on the table 102 with the handle 200 When positioned in the second position, the preload mechanism generates 158 a second clamping force on the table between the third contact 184 and the two sliding contacts 172 , 174 The second clamping force is greater than the first clamping force and exerts a sufficient force to position the guide assembly. 150 along the sliding axis 118 to fix. In one embodiment, the second clamping force is a "sufficient force" if it prevents movement of the guide arrangement. 150 resists when the leadership order 150 in the direction of the sliding axis 118is subjected to a lateral load of at least 30 pounds. It is assumed that the preload mechanism... 158 the second clamping force on the table 102 "selectively produced" because the handle 200 optional in the second position to fix the guide arrangement 150 is placed on the table. It is assumed that the pre-tensioning mechanism... 158 the initial clamping force on the table 102 "continuously generated" because the handle 200 can only be positioned between the first and second positions, and the handle 200 must be in the first position to establish the lead order 150 on the table 102 to attach.

[0027] Fig. 6-8 show a guide arrangement 250 according to a second embodiment. The figures show elements of the guide arrangement. 250 , the elements of the guide arrangement 150 out of Fig. 1-5 resemble each other, designated with the same reference numbers. New or modified elements of the guide arrangement. 250 are designated with new reference numbers. The management order 250 is with the table saw 100 compatible, so that elements of the table saw that are in the Fig. Figures 6-8 are shown and are designated with the same reference numbers.

[0028] The leadership order 250 indicates the adjusting element 152 , a preload mechanism 258 , which is at the first end of the alignment element 152 is arranged, and a sliding mechanism 254 on, which is at the second end of the alignment element 152 is arranged. The sliding mechanism 254 resembles the sliding mechanism 154 from the Fig. 1-5, except that the sliding mechanism 254 has no handle. As it says in Fig. As can be seen in section 6, this is the sliding mechanism. 254the leadership order 250 is on one side of the table 102 arranged so that two sliding contacts 172 , 174 with the leadership 112 collaborating, those furthest from the user of the table saw 100 is located far away.

[0029] Further referring to Fig. 6-8 indicates the preload mechanism 258 a case 260 up, which is connected to the first end of the alignment element 152 is connected. The preload mechanism 258 also features a lever 262 on, which is pivotable at one end on a pivot pin 264 inside the case 260 is attached. A third contact 266 is at the other end of the lever 262 arranged. The lever 262 is designed to facilitate third contact 266 around the pivot 264 to the two sliding contacts 172 , 174 to turn the lever 262of the preload mechanism 258 rotates the third contact 266 in planes essentially in the same way as the lever 180 of the preload mechanism 158 out of Fig. 1-5 the third contact 184 rotates in planes.

[0030] The lever 262 places the third contact 266 with respect to the sliding axis 118 between the two sliding contacts 172 , 174 the sliding mechanism 254 In at least one embodiment, the contact point of the third contact is 266 on the table 102 aligned to a plane normal to the sliding axis 118 is oriented and through a center of the alignment element 152 The process. The positions of the two sliding contacts 172 , 174 and the third contact 184 against the side surfaces 116 the guided tours 110 , 112form a triangle in a similar way to the contacts 172 , 174 and 184 the leadership order 150 , which in Fig. 1 can be seen. The preload mechanism 258 according to the second embodiment of the guide arrangement 250 is on one side of the table 102 arranged so that the third contact 266 the side surface 116 the leadership 110 touches that are closer to the user of the table saw 100 lies, as it is in Fig. 6 can be seen.

[0031] Referring to Fig. 7 and Fig. The lever points to 8 262 in one embodiment a single, unified body extending from the pivot pin 264 extends away. Lever 262 has ribs or walls that serve to reinforce the lever 262 are designed to resist bending under load. The lever 262 It also features a flange section268 on, who makes the third contact 266 with the preload mechanism 258 connects. The third contact 266 the leadership order 250 is essentially designed in the same way as the third contact 184 the leadership order 150 , which relate to Fig. 1-5 has been described, so no further description is provided here.

[0032] The leadership order 250 It also features a rod system. 270 and a handle 272 up. The handle 272 is associated with a receiving region 274 of the lever 262 in operational connection and positionable between a first position and a second position. In the illustrated embodiment, the handle rotates. 272 regarding the lever 262 between the first position and the second position. The linkage. 270 has a first end in operational connection with the handle272 The frame 270 passes through an opening 276 in the lever 262 of the preload mechanism 258 at a point between the pivot 264 and the third contact 266 The frame 270 also runs through an opening 278 inside the case 260 of the preload mechanism 258 and has a second end that is located in an interior of the alignment element. 152 is arranged. A section of the linkage. 270 next to the second end, in the alignment element 152 held. In some embodiments, the linkage section is held by the housing. 260 in the alignment element 152 held. In other embodiments, a holding element holds. 280 , which is attached to one or more of the alignment elements 152 and the casing 260 is attached, the rod section in the alignment element 152 .

[0033] If the leadership order 250 on the table 102 As it is arranged, a movement of the handle moves it 272 from the first position to the second position, the second end of the linkage 270 in one direction towards the case 260 A movement of the handle 272 The second end of the linkage is moved from the second position to the first position. 270 in one direction from the case 260 away. In one embodiment, the linkage is 270 designed as an elongated threaded fastener and the handle 272 is designed as an eccentric mechanism.

[0034] The frame 270 has a head section 282 , which is located at the second end. The head section 282 In the illustrated embodiment, it has a diameter that is larger than the diameter of the rest of the linkage. 270 between the head section 282 and the one with the handle272 The first end is connected. The linkage 270 features a pre-tensioning element 284 up, which is between the head section 282 and the retaining element 280 or the case 260 is arranged. In the illustrated embodiment, the preload element is a compression spring. 284 with spirals that secure the linkage 270 surrounded, designed. The prestressing element 284 is designed to increase the leverage 262 and the third contact 266 to the two sliding contacts 172 , 174 to pre-tension.

[0035] The leadership order 250 has an unlocked state, which corresponds to the first position of the handle. 272 corresponds to a locked state, which corresponds to the second position of the handle. 272 This corresponds to the first position of the handle. 272 has the pretensioning element 284 a first compression between the head section 282and the retaining element 280 or the case 260 , which the lever 262 and the third contact 266 movable relative to the two sliding contacts 172 , 174 pre-tensioned. If the guide arrangement 250 on the table 102 with the handle 272 When positioned in the first position, the preload mechanism generates 258 continuously applies an initial clamping force to the table between the third contact 266 and the two sliding contacts 172 , 174 The first clamping force of the guide arrangement 250 out of Fig. 6-8 provides the same functionality as described above in conjunction with the first clamping force of the guide arrangement. 150 out of Fig. 1-5 was described.

[0036] If the lever 272 the leadership order 250 When the preload element is moved from the first position to the second position, it is moved. 248from the first compression between the head section 282 and the retaining element 280 or the case 260 further compressed. The force on the lever 262 during this initial movement of the handle 272 from the first position based on the properties of the prestressing element 284 taking into account the compression, spring constant, material and other properties of the preload element 284 to. The leadership order 250 is designed in such a way that the preload element 284 Full compression is achieved when the handle is in an intermediate position between the first and second positions. Once the preload element... 284 Full compression is achieved; a further turn of the handle leads to... 272 into the second position so that the force is applied to the linkage 270 directly onto the lever 262 over the handle 272This effect increases the force on the lever. 262 by further turning the handle 272 significantly increased.

[0037] In some embodiments, the linkage has 270 furthermore, a spacer 286 ( Fig. 8) on, which is between the head section 282 and is arranged with the retaining element. The spacer 286 is within the prestressing element 284 nested and designed to fully compress the preload element 284 to prevent, if the handle 272 is rotated from the first position to the second position. The spacer 286 the leadership order 250 out of Fig. 6-8 provides the same functionality as described above in conjunction with the spacer. 214 the leadership order 150 out of Fig. 5 was described.

[0038] In embodiments with or without spacers 286The preload mechanism generates 258 a second clamping force on the table between the third contact 266 and the two sliding contacts 172 , 174 , if the handle 272 in the second position. The second clamping force of the guide arrangement 250 out of Fig. 6-8 provides the same functionality as described above in conjunction with the second clamping force of the guide arrangement. 150 out of Fig. 1-5 was described.

[0039] Fig. 9-12 show a leadership arrangement 350 according to a third embodiment. The figures show elements of the guide arrangement. 350 , the elements of the guide arrangement 150 out of Fig. 1-5 and the leadership order 250 out of Fig. 6-8 resemble each other, designated with the same reference numbers. New or modified elements of the guide arrangement. 350are designated with new reference numbers. The management order 350 is with the table saw 100 compatible, so that elements of the table saw that are in the Fig. 9-12 are shown, and are designated with the same reference numbers.

[0040] The leadership order 350 indicates the adjusting element 152 , a sliding mechanism 354 , which is at the first end of the alignment element 152 is arranged, and a pre-tensioning mechanism 358 on, which is at the second end of the alignment element 152 is arranged. The preload mechanism 358 resembles the preload mechanism 258 from the Fig. 6-8, except that the preload mechanism 358 It has no handle. The casing 260 of the preload mechanism 258 is connected to the second end of the alignment element 152 connected. The lever 262It is pivotable at one end on the pivot pin 265 inside the case 260 attached and the third contact 266 is at the other end of the lever 262 arranged.

[0041] The lever 262 is designed to facilitate third contact 266 around the pivot 264 to the sliding mechanism 354 to turn the lever 262 of the preload mechanism 358 rotates the third contact 266 in planes essentially in the same way as the lever 180 of the preload mechanism 158 out of Fig. 1-5 the third contact 184 rotates in planes. The preload mechanism 358 is on one side of the table 102 arranged so that the third contact 266 with the side surface 116 the leadership 112 works together, which is provided by the user of the table saw 100 is furthest away, as it is in Fig. 9 can be seen.

[0042] The frame 350 It also features a first linkage. 360 and a pre-tensioning element 362 up. The first linkage 360 runs through the opening 276 in the lever 262 of the preload mechanism 358 at a point between the pivot 264 and the third contact 266 A first end of the first rod 360 has a first head section 364 , which is attached to an outside 366 of the lever 262 bumps into. The first linkage 360 It also runs through the opening 278 inside the case 260 and has a second end that is located inside the alignment element. 152 is arranged. A section of the first linkage. 360 next to the second end, in the alignment element 152 held. In some embodiments, the linkage section is held by the housing. 260 in the alignment element 152held. In other embodiments, a (not shown) holding element attached to one or more of the alignment elements holds. 152 and the casing 260 is attached, the rod section in the alignment element 152 .

[0043] The first pole 360 It also has a second head section. 368 , which is located at the second end. The prestressing element 362 is between the second head section 368 and the retaining element or the housing 260 arranged. In the embodiment shown, the preload element is a compression spring. 362 with spirals that form the first linkage 360 surrounded, designed. The prestressing element 362 is designed to increase the leverage 262 and the third contact 266 to the sliding mechanism 354 to pre-tension.

[0044] Now, referring to Fig. 12 indicates the sliding mechanism 354a movable handle section 370 on, which is rotatable with a fixed housing section 372 via a pivot 374 is connected. The housing section 372 is connected to the first end of the alignment element 152 connected. The housing section 372 is with regard to the alignment element 152 fixed to ensure the alignment of the alignment element 152 regarding the blade via the sliding mechanism 354 to be determined. The sliding mechanism 354 It also features two sliding contacts. 172 , 174 on, which is located at a lower end of the housing section 372 are arranged. The sliding contacts 172 , 174 are on both sides of the alignment element 152 along the sliding axis 118 spaced apart, as it says in Fig. Figure 9 shows the sliding contacts of the guide assembly. 350 out of Fig. 9-12 have the same attributes and functionality as the sliding contacts. 172 , 174 , which in connection with the leadership order 150 out of Fig. 1-5 has been described, so no further description is provided here.

[0045] The handle section 370 has a connecting link 376 on, the first end of which is pivotable with a pivot pin 378 is connected to the handle section 370 is supported. A cam connection 380 is connected to a second end of the connecting link 376 via a pivot 382 connected. A locking element 386 is with the housing section 372 connected and attached to a pivot 388 It supports and rotates around this. The locking element 386 has a terminal section 387 on, which is located below the lower end of the housing section 372extends downwards and the side surfaces 116 the sliding contacts 172 , 174 is facing the cam connection. 380 features a cam section 384 on, which revolves around a pivot 385 in the housing section 372 rotates and the locking element 386 takes action.

[0046] The handle section 370 is around the pivot 374 between a (not shown) drawn-out first position and a withdrawn second position, as seen in Fig. As can be seen on page 12, it is rotatable. The locking element 386 has a first position, which is the first position of the handle section. 370 corresponds to a second position, which corresponds to a second position of the handle section. 370 This corresponds to the first position of the handle section. 370 has the final section 387 of the locking element 386a first distance from the side surfaces 116 the sliding contacts 172 , 174 along the cutting direction 108 In the second position of the handle section 370 has the final section 387 a second distance from the side surfaces 116 the sliding contacts 172 , 174 along the cutting direction 108 , where the second distance is smaller than the first distance. The sliding mechanism 354 is designed in such a way that the end section 387 and the sliding contacts 172 , 174 the leadership 110 at the front of the table 102 span. In some embodiments, the end section spans. 387 and the sliding contacts 172 , 174 an upward-pointing protrusion 390 the leadership 110 .

[0047] If the leadership order 350 on the table 102The preload mechanism is arranged to generate 358 continuously applies an initial clamping force to the table between the third contact 266 and the two sliding contacts 172 , 174 The preload mechanism 358 It generates the initial clamping force regardless of the position of the handle section. 3709 the sliding mechanism 354 The first clamping force of the guide arrangement 350 out of Fig. 9-12 provides the same functionality as described above in conjunction with the first clamping force of the guide arrangement. 150 out of Fig. 1-5 was described.

[0048] If the handle section 370 in the first position is the final section 387 of the locking element 386 from the leadership 110 spaced apart, while the two sliding contacts 172 , 174 due to the initial clamping force against the side surfaces 116 the leadership110 to be drawn. The leadership order 350 It is adjustable and slidable along the sliding axis under the initial clamping force. For securing the guide assembly. 350 at the table 102 will the handle section 370 rotated into the second position, resulting from the operational connections between the connecting link 376 , the cam connection 380 and the locking element 386 the final section 387 in contact with a side surface 392 the leadership 110 is moved, which is opposite the side surface 116 the leadership 110 The sliding mechanism is located. 354 creates a second clamping force on the table between the end section 387 of the locking element 386 and the two sliding contacts 172 , 174 , if the handle section 370 in the second position. The second clamping force of the guide arrangement350 out of Fig. 9-12 provides the same functionality as described above in conjunction with the second clamping force of the guide arrangement. 150 out of Fig. 1-5 was described.

[0049] Although several embodiments of the guide arrangement are described herein, each of these embodiments exhibits some core features. With respect to the first and second embodiments of the guide arrangement, the guide arrangement uses only three contact points to establish alignment with respect to a blade of a saw device in an unlocked, pre-tensioned state of the guide arrangement. Two of the contact points are fixed on one side of the guide arrangement with respect to an alignment element. The third contact point is located opposite the fixed contact points on the other side of the guide arrangement. The three contact points are identical in both the locked and unlocked states of the guide arrangement. A pre-tensioning force, for example from a spring or gravity, provides the contact pressure on the third contact point in the unlocked state so that the guide arrangement remains rectangular.The fixed contact points rest on a rail or flat surface of the sawing device, perpendicular to the blade. These fixed contact points establish a T-square position, which aligns the guide assembly parallel to the blade. The third contact point is biased in the opposite direction to the fixed contact points. This third contact point lies between the fixed contact points, perpendicular to the blade. The pressure on the third contact point, acting in the opposite direction to the fixed contact points, establishes and maintains the T-square contact of the fixed contact points.

[0050] The connection between the third contact point and the fixed contact points is the alignment element in some embodiments or a linkage, such as a pull rod, in other embodiments. In embodiments with the pull rod, the pull rod is under tension from a preload element in a rest state, corresponding to the unlocked state, and under a greater locking tension, created by the locking lever, in a locked state of the guide assembly. The rest state tension on the third contact point has the force to correct any misalignment of the guide assembly and to restore the guide assembly to T-square contact with the fixed contact points. If a moment were applied to the guide assembly, the preload force would act as a corrective force, restoring the guide assembly to a right angle when the moment is reduced or removed.The third contact point has less resistance to movement; for example, it is designed as a wheel that allows for easy movement of the guide assembly.

[0051] When a locking lever is engaged to increase the force between the third contact point and the T-square, the normal forces are increased to a level where the perpendicular sliding friction is high enough to fix the guide assembly for operation. The increased force is achieved by engaging the preload element in some embodiments or by engaging a positive mechanical lock along the preload element's path in other embodiments. The increased normal force at the contact points increases the frictional force against movement perpendicular to the blade and locks the guide assembly in its position for operation. Without any change to the three contact points and without any additional contact points during locking actuation, there is no movement of the guide assembly between the unlocked and locked states.Simplifying the contact points allows the use of guides or rails that do not have cavities or grooves in which the guide assembly has to move, because dust eventually accumulates in these on known sawing devices, clogging them.

[0052] In some embodiments, the rails have a slight inward (or negative) angle to exert a slight downward force to hold the guide assembly on the saw in motion, and to exert a greater downward force under the higher locking tension added to the normal force, along with a corresponding frictional force against movement in the locked state. The use of a spherical wheel as a third contact point allows freedom in positioning the wheel axle relative to the rail contact angle to achieve a linear rolling motion during operation. In some embodiments, the guide assembly includes an adjustment device for setting the timing or positioning of the mechanical contact during the locking phase to increase or decrease the locking force of the guide assembly.

[0053] Regarding the third embodiment, an independent locking mechanism with a fourth locking contact point is incorporated within the T-square structure, opposite the two fixed contact points. Since the locking contact point is located within the "support base" triangle formed by the fixed contact points and the third contact point, this locking contact point does not move the guide assembly during the locking phase. The locking contact point engages from within a groove in the rail, but jamming is prevented by the unlocked position of the locking contact point with vertical play from the groove. Additionally, the locking contact point, being centered on the T-square, provides more movement before jamming compared to when it is located directly behind the contact guide.Adding the locking contact point provides greater locking force by using a high frictional contact instead of a guide or roller. This configuration provides higher locking force for the guide assembly with lower stress on the system components.

[0054] Although the disclosure has been extensively illustrated and described in the drawings and the preceding description, this is to be regarded as illustrative only and not as limiting. It is understood that only preferred embodiments have been presented and that all changes, modifications, and further applications falling within the spirit of the invention are to be protected.

Claims

[1] Guide arrangement for aligning a workpiece on a table of a sawing device, comprising: an alignment element with a first end and a second end at a distance from the first end; a sliding mechanism arranged at the first end, the sliding mechanism having two sliding contacts spaced apart on both sides of the alignment element along a sliding axis; and a preloading mechanism arranged at the second end, wherein the preloading mechanism has a third contact which is preloaded to the two sliding contacts and is arranged between the two sliding contacts with respect to the sliding axis, wherein the preload mechanism is designed to continuously generate a first clamping force on the table between the third contact and the two sliding contacts, wherein the first clamping force enables a displaceable adjustment of the guide arrangement along the sliding axis, and wherein the preloading mechanism is further designed to selectively generate a second clamping force on the table between the third contact and the two sliding contacts, wherein the second clamping force fixes a position of the guide arrangement along the sliding axis. [2] Guide arrangement according to claim 1, wherein the third contact to the two sliding contacts rotates about a pivot pin. [3] Guide arrangement according to claim 2, wherein the third contact rotates in a plane normal to the sliding axis. [4] Guide arrangement according to claim 1, further comprising a linkage that connects the pretensioning mechanism to one or more of the alignment element and the sliding mechanism. [5] Guide arrangement according to claim 4, further comprising a handle which is in operational contact with a first end of the linkage, wherein: the handle can be positioned between a first position and a second position, The preload mechanism generates the first clamping force when the handle is in the first position, and The preload mechanism generates the second clamping force when the handle is in the second position. [6] Guide arrangement according to claim 5, wherein the preloading mechanism has a lever which is connected at one end to the pivot pin and at the other end to the third contact. [7] Guide arrangement according to claim 6, wherein the linkage passes through the lever and has a spring designed to pre-tension the lever and the third contact to the two sliding contacts. [8] Guide arrangement according to claim 7, wherein: the handle is in operational contact with the sliding mechanism; the linkage has an adjustment device that is connected to a second end of the linkage, and the spring is arranged between the adjusting device and the lever, with the spring having a first compression when the handle is in the first position. [9] Guide arrangement according to claim 8, wherein the spring reaches full compression when the handle is in an intermediate position between the first position and the second position. [10] Guide arrangement according to claim 8, wherein: the linkage has a spacer that is arranged between the adjusting device and the lever, the spacer has a clearance between the adjustment device and the lever when the handle is in the first position, and The spacer touches the adjusting device and the lever when the handle is in an intermediate position between the first position and the second position. [11] Guide arrangement according to claim 7, wherein: the handle is in operational contact with the lever, the linkage has a second end which is held by a body of the pretensioning mechanism in the alignment element, and the spring is positioned between the second end and the body, with the spring having a first compression when the handle is in the first position. [12] Guide arrangement according to claim 11, wherein the spring reaches full compression when the handle is in an intermediate position between the first position and the second position. [13] Guide arrangement according to claim 11, wherein: the linkage has a spacer that is positioned between the second end and the body, the spacer has a gap between the second end and the body when the handle is in the first position, and The spacer touches the second end and the body when the handle is in an intermediate position between the first position and the second position. [14] Guide arrangement according to claim 1, wherein the third contact is a wheel oriented to make rolling contact with the table when the guide arrangement is moved along the sliding axis. [15] Guide arrangement according to claim 14, wherein the wheel has a spherical profile, seen in a plane passing through and aligned with the axis of rotation of the wheel. [16] Guide arrangement according to claim 1, wherein: the two sliding contacts are arranged at the same distance from a plane that is oriented normal to the sliding axis and passes through a center of the alignment element, and the third contact is aligned with the plane. [17] Guide arrangement for aligning a workpiece on a table of a sawing device, comprising: an alignment element with a first end and a second end at a distance from the first end; a sliding mechanism arranged at the first end, wherein the sliding mechanism (i) has a pivotable locking element and (ii) has two sliding contacts spaced apart on both sides of the alignment element along a sliding axis; and a preloading mechanism located at the second end, wherein the preloading mechanism has a third contact which is movably preloaded to the two sliding contacts and is located between the two sliding contacts along the sliding axis, wherein the preload mechanism is designed to continuously generate a first clamping force on the table between the third contact and the two sliding contacts, wherein the first clamping force pulls the two sliding contacts into contact with the table and allows a sliding adjustment of the guide arrangement along the sliding axis, and wherein the sliding mechanism is designed to generate a second clamping force on the table between the locking element and the two sliding contacts, wherein the second clamping force fixes a position of the guide arrangement on the table along the sliding axis. [18] Guide arrangement according to claim 17, wherein the preloading mechanism has a lever which is connected at one end to a pivot pin and at the other end to the third contact, such that the third contact rotates about the pivot pin to the two sliding contacts. [19] Guide arrangement according to claim 17, wherein: the sliding mechanism comprises a linkage and a handle, wherein the linkage is in operational contact at one end with the locking element and at the other end with the handle, wherein the handle can be positioned between a first position and a second position, and wherein the locking element is pivotable between an unlocked position, which corresponds to the first position of the handle, and a locked position, which corresponds to the second position of the handle. [20] Guide arrangement according to claim 19, wherein: the locking element in the unlocked position is spaced from a guide on the table, on which the two sliding contacts are in contact due to the first clamping force; and The locking element is pre-tensioned against the table guide in the locked position to generate the second clamping force on the table.

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