Patent Publication Number: US-9833929-B2

Title: Table type cutter and cutting worktable thereof

Description:
RELATED APPLICATION DATA 
     This application claims the benefit of CN 201310208515.6, filed on May 30, 2013, the disclosure of which is incorporated herein by reference in its entirety. 
     FIELD OF THE DISCLOSURE 
     The following generally relates to a table type cutter and its cutting worktable and, more particularly, to a table type cutter and its cutting worktable for cutting stone materials such as ceramic files. 
     BACKGROUND 
     A table type cutter, as a cutting apparatus for stone materials such as ceramic tiles, usually employs a circular saw blade as a cutting tool. Upon processing, the saw blade is usually fixed, and a work table surface is moved to bring the stone material to be cut towards the blade to perform a cut. However, the worktable surface usually slides only in one direction which is typically a horizontal direction. If a flat panel-like stone material is placed flat on the worktable surface for cutting, a final cutout is a segment of a circular arc due to the contour of the circular saw blade and the thickness of the flat-panel-like stone material (as shown in  FIG. 1 ). In fact, what is desired is an approximately straight line flat cutout. To get a straight line flat cutout, a worker usually needs to manually lift the stone material to incline it relative to the saw blade (as shown in  FIG. 2 ). The ability to obtain such cuts, however, depends on the operator&#39;s own expertise and proficiency. 
     SUMMARY 
     In order to overcome drawbacks in the prior art, an object of the subject disclosure is to provide a table type cutter and a cutting worktable by which an operator, depending on his expertise, quickly places a stone material relative to the saw blade for cutting to obtain a flat cutout. 
     To achieve the above object, the present invention employs the following technical solutions: 
     A cutting worktable comprises: a worktable body comprising a distal side away from a cutting tool and a proximal side adjacent to the cutting tool; and a support frame assembly disposed at the proximal side of the worktable body for obliquely supporting an object to be cut, the support frame assembly comprising a support roller contacting with the object, the worktable body being provided with a limiting structure for abutting against the object and limiting its displacement. 
     The disclosed cutting system is advantageous in that the stone material can be placed on an incline and be effectively fixed via the turnable support frame assembly and where a plurality of placement grooves are provided to effectively achieve placement of the stone material at different angles. A limiting stop linkable with the support frame assembly can be used as a position limitation device with a slide limiting block on the frame to prevent the support frame assembly from being cut inadvertently by the saw blade. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of a shape of a cutout when cutting is performed with a stone horizontally orientated with respect to the cutting blade; 
         FIG. 2  is a schematic view of a shape of a cutout when cutting is performed with the stone inclined with respect to the cutting blade; 
         FIG. 3  is a structural schematic view of an exemplary table type cutter constructed according to the description which follows; 
         FIG. 4  is a structural schematic view of a cutting worktable and a worktable bracket of the table type cutter shown in  FIG. 3 ; and 
         FIG. 5  is a structural schematic view of a driving end and a limiting stop of the cutting worktable shown in  FIG. 4 . 
     
    
    
     DETAILED DESCRIPTION 
     An exemplary table type cutter will now be described in detail with reference to the figures. Referring to  FIGS. 3-5 , an exemplary table type cutter comprises a cutting head assembly  3 , a support arm assembly  4 , a base, a cutting worktable body  1 , a worktable bracket  5 , and a receiving cavity; wherein the base comprises a frame  6 , a foldable support  7 , a shaft  203 , a driving end  204  and a notch  105 . 
     The cutting head assembly  3  and the support arm assembly  4  constitute a whole which is fixed above the frame  6 , wherein the support arm assembly  4  is used to support the cutting head assembly  3 . The frame  6  is provided with a slide rail  601 . The cutting worktable body  1  and the worktable bracket  5  constitute a whole and form a slide connection with the frame  6  via the slide rail  601 , wherein the worktable bracket  5  is located below the worktable body  1  of the cutting worktable. The foldable support  7  is disposed below the frame  6  to support the frame  6  and other parts connected thereon. In order to achieve height adjustment, connection of the foldable support  7  and the frame  6  is not fixed. The portion of the frame  6  for connecting the foldable support  7  may be provided with a plurality of catch positions, and the foldable support  7  can be snap-fit into different catch positions so as to achieve height adjustment of the frame  6 , i.e., to achieve height adjustment of the cutting worktable. 
     The cutting head assembly  3  comprises a cutting tool for cutting. The side of the worktable body  1  away from the cutting tool is a distal end side, and the side closest to the cutting tool is a proximal end side. The cutting tool is a circular saw blade which is rotatable and driven by a motor. The axis of rotation of the circular saw blade is parallel to the axis of a support roller. 
     A main improvement in the cutting worktable is particularly described below with reference to  FIGS. 4 and 5 . 
     The cutting worktable comprises the worktable body  1  and a support frame assembly  2 . The worktable body  1  comprises a fence  102 , a slot  104  and a limiting structure comprising a plurality of placement grooves  101  formed on the worktable body  1 ; the support frame assembly  2  comprises an arm  201  and a support roller  202 ; wherein the top surface of the worktable body  1  is used for positioning and fixing a stone material. In order to achieve inclined placement of the stone material relative to the worktable body  1 , the top surface of the worktable body  1  is formed with a plurality of placement grooves  101  and the fence  102  raised at one side edge thereof. A “M”-shaped notch  105  is formed at the other side edge away from the fence  102 , and the mounting notch  105  is mainly used to mount and receive the support frame assembly  2 . 
     The placement grooves  101  serve to position and catch one side of the panel-like stone material. Since at this time, the panel-like stone material is inclined, it is preferred that, in order to catch the stone material, the placement grooves  101  consists of a first wall surface inclined towards the fence  102  and a second wall surface which crosses therewith and is inclined towards the notch  105 , as a preferred solution. 
     The support frame assembly  2  comprises two arms  201  and a support roller  202  disposed therebetween, wherein the arms  201  are used to rotatably connect with two projecting portions of the “ ”-shaped notch  105 , that is, to form a rotatable connection with the worktable body  1 . As a result, the support roller  202  may turn above the worktable body  1  along with the rotation of the arms  201 , wherein the axis of the support roller  202  is parallel to a rotation axis of the arms  201 , and the two axes are both parallel to the wall surface of the placement groove  101 . Thus, one side of the stone material to be cut may be caught by the placement groove  101  and the other side is lifted and supported by the support roller  202  and thereby a non-manual lifting of the stone material is achieved. At this time, feeding the stone material for cutting in an inclined state may be achieved only by translating the cutting worktable, and multi-angle placement may be achieved by appropriately providing the plurality of placement grooves  101 ; the support frame assembly  2  is pivotably connected to the worktable body  1 . The pivot axis of the rotatable connection is parallel to the central axis of the support roller and perpendicular to a cutting direction of the cutting tool. 
     It is noted that the support roller  202  may be fixedly or rotatably connected to the arms  201 . Besides, the support roller  202  may be provided with a plurality of circumferential slots arranged in its axial direction. 
     As a preferred embodiment, in order to effectively control a movement scope of the support roller  202  and constitute stable support for it, the worktable body  1  is, at a bottom end position of the notch  105 , provided with two limiting tabs  103  for limiting a downward turning extremity position of the arms  201 . The two limiting tab  103  can limit the downward turning position of the arms  201  and, as such, limit a downward turning position of the support roller  202 . In order to limit an upward turning position of the support roller  202  and enable it to be supported by the top surface of the worktable body  1 , the top surface of the worktable body  1  adjacent to the notch  105  is formed with slots  104  for limiting an upward turning extremity position of the arms  201 . Certainly, the number and positions of the slots  104  are corresponding to the arms  201 . The slot  104  has a vertical wall surface and an inclined groove bottom surface. The contour of one side of the arm  201  in contact with the slot  104  is divided into a limiting segment  201   a  for contacting the groove bottom surface to achieve a limit position, and an abutting segment  201   b  in contact with the top surface of the worktable body  1  to achieve supporting. The limiting segment  201   a  of the arm  201  is embedded in the slot  104  and contacts with the groove bottom surface to constitute a position limitation so that it cannot turn upwardly further, while the abutting segment  201   b  contacts the top surface of the worktable body  1  so that the top surface of the worktable body  1  constitutes a support for the arm  201  to enable the support roller  202  to have a load-carrying capability. 
     According to the above solution, if the cutting worktable indefinitely approaches the cutting head assembly  3 , the support roller  20  turned to its top surface has a risk of being cut, and this situation does not exist when the support roller  202  turns away from the top surface. Therefore, it is advantageous that a limiting mechanism linkable with the turning of the support roller  202  is needed in a way that it has a limiting function only when the support roller  202  is turned to the top surface of the worktable body  1 . 
     In order to achieve this purpose, as a preferred embodiment, the cutting worktable is provided with a limiting stop  8  which is extensible out of or retractable into the worktable body along with arm  201 . A specific solution may be as follows: the worktable body  1 , at a bottom surface at the notch  105 , is formed with a downwardly opening receiving cavity, and a cavity wall of the receiving cavity is formed with a mounting through hole, or the underside of the worktable body  1  is wholly an open cavity, i.e., the worktable body  1  is constituted by a top surface and a cavity wall extending downwardly from its periphery, and a mounting through hole is provided at the notch  105 . The above two solutions are substantively the same. 
     The support frame assembly  2  further comprises the shaft  203  enabling the arm  201  to rotatably connect with the worktable body  1 . The shaft  203  passes through the mounting through hole of the receiving cavity, wherein one end of the shaft is fixedly connected to the arm  201 , and the other end is mounted with a driving end  204  for driving the limiting stop. The limiting stop  8  is rotatably connected in the receiving cavity and its rotation axis is perpendicular to the axis of the shaft  203 . The receiving cavity is provided at the side facing a slide limiting stop  602  of the frame  6  with an extension notch  107  for allowing the limiting stop  8  to extend out. 
     The driving end  204  comprises an end body  204   a  which external contour is a revolution body, and a driving block  204   b  formed on the periphery of the end body  204   a  and used for driving the limiting stop  8  to rotate. The upper edge contour of the limiting stop  8  is formed from inside adjacent to the driving end  204  to outside with following segments in turn: a contact linear segment  801 , a transitional linear segment  802 , a non-contact linear segment  803  which is parallel to the contact linear segment  801  and higher than the contact linear segment  801  when it is parallel to a horizontal plane, a distal rounded corner  804 , wherein the transitional linear segment  802  is inclined between the contact linear segment  801  and the non-contact linear segment  803 . 
     The lower edge contour of the limiting stop  8  is formed from inside adjacent to the driving end  204  to outside with the following segments in turn: a bottom edge inside linear segment  805 , a bottom edge transitional linear segment  806  and a bottom edge outside linear segment  807  which is parallel to the bottom edge inside linear segment  805  and is lower than the bottom edge inside linear segment  805  when it is parallel to the horizontal plane. Meanwhile, the frame  6  is provided with the slide limiting block  602  for limiting position. 
     With the above design, when the support roller  202  is allowed to turn away from the top surface, the driving block  204   b  contacts with the contact linear segment  801  so that one end of the distal rounded corner  804  of the limiting stop  8  lifts up. As such, the bottom edge outside linear segment  807  is received in the extension notch  107 , and thus the limiting stop  8  does not play a limiting role; when the support roller  202  is turned above the top surface, the shaft  203  is brought into rotation, the driving block  204   b  leaves the original position due to rotation, and one end of the bottom edge outside linear segment  807  extends downwardly out of the notch  107  due to gravity to achieve position limitation. 
     The above illustrates and describes basic principles, main features and advantages of the subject cutting table. Those skilled in the art should understand that the above embodiments are not intended to limit the invention that is hereinafter claimed. Rather, all technical solutions obtained by using equivalent substitutes or equivalent variations are intended to fall within the protection scope of the invention that is hereinafter claimed.