1. Field of the Invention
This invention relates to a check plate unit for a table saw, particularly to one swiftly combinable and collapsible.
2. Description of the Prior Art
A conventional check plate unit for a table saw shown in
This invention has bee devised to offer a swiftly collapsible check plate unit for a table saw, featured by a separating plate, a combining base, a fixing member and two check plates combined together.
The separating plate is provided with a fixing hole that has a collar opening and a round bottom. The fixing member is provided with an engage block with a size as the fixing hole of the separating plate, and the engage block has two cut surfaces to face to the inner wall of the collar opening. The fixing member further has a handling portion formed in its rear portion. After the fixing member is combined with said combining base through the separating plate, the handling portion can be turned to rotate the fixing member so as to fix firmly the combining base with the separating plate swiftly so that the two check plates are also combined with the separating plate. Thus the two check plates can be swiftly combined with the combining base and the separating plate at the same time or collapsed by turning the handling portion of the fixing member.
This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of a check plate unit for a table saw in the present invention, as, shown in
The separating plate 10 is fixed on the body of a table saw (not shown), having a connect portion 11, an engage groove 12 formed in a side of an upper end and having a collar opening 121 and a round bottom 122, a pivot groove 13 of an oval shape formed in a left side, a rectangular recess 14 formed in an intermediate portion of the upper end. The rectangular recess 14 is positioned in parallel to the engage groove 12 and the pivot groove 13.
The combining base 20 is oval, having an insert slot 21 formed sidewise in a bottom to fit with the connect member 11 of the separating plate 10, a round-post shaped position hole 22 bored to correspond to the pivot groove 13 of the separating plate 10, a round-post shaped pivot hole 23 bored in a left side for a shaft 24 to extend therein and further in the pivot groove 13. Further, a shaft tube 25 and 26 is fixed in two sides of the rectangular recess 14 of the separating plate 10 for receiving a position tube 27 therein and further in the rectangular recess 14. Moreover, a first position limit member 28 and a second position limit member 29 are provided on a front annular surface of the position hole 22, located diagonally, with the first position limit member 28 located at the right side of the position hole 22 and with the second position limit member 29 located at the left side of the same hole 22. Both the first and the second position limit member 28 and 29 are of a post shape, and the first position limit member 28 is just at an upper end of the position hole 22, having a limit surface 281 formed in its bottom. The second position limit member 29 is just at a left lower end of the position hole 22, having a limit surface 291 at a side of the position hole 22.
The fixing member 30 is to fix the combining base 20 on the separating plate 10, having an engage portion 31, and a handle portion 32 formed to extend rearward from the engage portion 31 for rotating the fixing member 30. The engage portion 31 is shaped as a round post, just fitting in the position hole 22, and the handle portion 32 is located between the first and the second position limit member 28 and 29. The engage portion 31 is provided with a first annular groove 311 to correspond to the engage groove 12 with an engage block 33 formed in an inner wall of the first annular groove 311, and the engage block 33 has a same width as the round bottom 122 of the separating plate 10, and a cut surface 331 respectively at a left and a right side. Further, the engage portion 31 is provided with a second annular groove 312 in front of the second annular groove 311 for a tightening member 34 to be mounted around. The tightening member 34 is made of rubber of an O-shape. The handling portion 32 is perpendicular to the cut surfaces 331 of the engage block 33, possible to be shaped as rectangular or semicircular, and it is rectangular in this invention.
The two check plates 40 are respectively provided with a shaft hole 41 at an upper left end to correspond to the shaft tubes 25 and 26 of the combining base 20 for a shaft 42 to fit through and also in the shaft tubes 25 and 26 so the check plates 40 may be combined with the combining base 20. Further, a torque spring 43 is deposited between the shaft tubes 25 and 26 respectively and the shaft hole 41, so each check plate 40 may be pressed by each torque spring 43. In addition, each check plate 40 has plural teeth 44 formed along a lower curved edge.
Next, how to combine and use the check plate unit is to be described below.
In assembling, at first, the pivot 24 is inserted in the pivot hole 23, and further in the pivot groove 13 of the separating plate 10. Then the fixing member 30 is inserted in the position hole 22 of the combining base 20, with the handling portion 32 in parallel to the limit surface 281 gripped to turn the engage portion 31 in the position hole 22 and with the right upper surface of the handling portion 32 restricted by the limit surface 281. Thus the proper position of the fixing member 30 may be exactly known for positioning. Next, the torque spring 43 and the check plate 40 are combined with the shaft tubes 25 and 26 respectively, and the shaft 42 is inserted through the whole 41 and the shaft tubes 25 and 26 to fix the torque springs 43 in place at two sides of the knife plate 10. Then the insert groove 21 of the combining base 20 is fitted with the connect portion 11 of the separating plate 10. Now referring to
On the contrary, if the combining base 20 and the two check plates 40 are to be disassembled from the separating plate 10, the handling portion 32 is turned toward the limit member 28, to move the cut surfaces 331 back to the original position, so that the width of the engage block 33 can move out of the collar opening 121 to permit the fixing member 30 loosened out. Thus, the turning the handling portion 32 of the fixing member 30 can fix the combining base 20 with the separating plate 10 swiftly and conveniently.
Next,
The swiftly collapsible check plate unit for a table saw has the advantage that the two check plates 40 can swiftly be assembled with the separating plate 10 by means of the combining base 20, which is tightly assembled with the separating plate 10 by turning the handling portion 32 of the fixing member 30, and the combining base 20 is provided with the position limit members 28 and 29 for restricting the turning of the handle portion 32 to prevent excessive turning so that the handling portion 32 may accurately force the cut surfaces 331 of the engage block 33 fit in the engage groove 12, with the tightening member 34 keeping immovable the fixing block 33, finishing assembling the two check plates with the knife plate 10. On the contrary, if the two check plates 40 are to be collapsed, the handling portion 32 is turned to loosen the combining base 20 from the separating plate 10, and the two check plates 40 can automatically be loosened from the separating plate 10, quite swiftly and convenient to handle.
While the preferred embodiments of the invention have been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.