JPS63401Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a material conveying belt tension display device for a plane machine.

[Background of the idea] A conventional material feeding device will be explained with reference to FIG.

14 is a roller support member. The roller support member 14 includes a drive roller 2 at one end and a driven roller 4 at the other end so as to be movable left and right. A lateral groove extending in the longitudinal direction of the roller support member 14 is formed on the driven roller 4 support side of the roller support member 14 . A movable piece 15 is slidably supported in the horizontal groove, and is fixed to the driven roller 4. Further, the movable piece 15 is provided with a bolt 3 screwed in parallel to the horizontal groove, and the tip of the bolt 3 is in contact with the inner end of the horizontal groove so that the position of the tip of the bolt 3 does not change even when the bolt 3 is turned. being touched.

Therefore, when the bolt 3 is turned, the forward and backward movement of the bolt 3 is blocked by the inner end of the horizontal groove, so that only the movable piece 15 is rotated in the opposite direction to the direction of rotation of the bolt 3, that is, when the bolt 3 is tightened. When turned in this direction, it is moved to the right in FIG. By the movement of the moving piece 15, the tension of the material conveying belt 1 is adjusted via the driven roller 4.

However, when the tension of the material conveying belt is adjusted in the above configuration, the appropriate tension value of the material conveying belt has to depend on the experience of the operator, and there is considerable variation. For this reason, if the material conveying belt is stretched too much, the motor that drives the drive roller will be overloaded, leading to early breakage of the material conveying belt. Furthermore, if the tension of the material conveying belt is insufficient, the material conveying force decreases and slips occur between the material conveying belt and the wood during material feeding, resulting in problems such as difficulty in smoothly conveying the material.

[Purpose of the invention] The purpose of the invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a material conveying belt tension display device that can clearly display the appropriate tension, over-tension, or insufficient tension of the material conveying belt. .

[Summary of the invention] The invention provides a detector having a first detection part and a second detection part at the inner end of a lateral groove formed in a roller support member, and the detector is installed at the tip of a bolt that adjusts the movement of the driven roller. A pressing member that comes into contact with the detection part is provided, and a compression spring is provided between the inner end of the horizontal groove and the pressing member to constantly press the pressing member outward, and a bolt screwed into the moving piece is turned in the tightening direction. In this case, if the tip position of the bolt is gradually moved toward the detector by a small amount, the moving piece can be moved outward as in the conventional case,
In addition, focusing on the fact that if the bolt is provided with a detector on the front end side, the bolt can operate the detector in relation to the movement of the driven roller, and the roller support member, the detector, the compression spring, and the pressing member are , the relationship between the bolts has been devised.

[Embodiment of the invention] An embodiment of the invention will be described with reference to FIGS. 2 and 3.

6 is a material feeding table. The head 9 disposed above the material feeding table 6 is equipped with a material feeding device in which the material feeding belt 1 is stretched between the outer circumferences of the driving roller 2 and the driven roller 4, and the column 7 and the column 7 provided above the material feeding table 6. It moves up and down via the feed screw 8. In the figure, reference numeral 13 indicates a display, which displays the tension state of the material conveying belt 1 when the tension of the material conveying belt 1 is adjusted as described later.

Next, the configuration of the material feeding device will be explained.

The roller support member 14, which has a drive roller 2 and a driven roller 4 at both ends, has a first detection section 16 and a second detection section at the inner end of a horizontal groove formed on the side supporting the driven roller 4.
A detector 11 having a two-stage detection section 17
is fixed, and one end of the compression spring 10 is supported.

On the other hand, a pressing member 12 is fixed to the tip of a bolt 3 screwed into a movable piece 15 provided on the driven roller 4, and the other end of the compression spring 10 is supported by the pressing member 12. Therefore, the bolt 3 is constantly pressed outward by the pressing force of the compression spring 10 via the pressing member 12, and the material conveying belt 1 is stretched outward via the moving piece 15 and the driven roller 4. Further, when the bolt 3 is rotated in the tightening direction against the pressing force and the pressing member 12 is moved toward the detector 11, when the material conveying belt 1 reaches an appropriate tension, the pressing member 12 and the first The positional relationship is such that the detecting section 16 comes into contact with the detecting section 16 .

In the above configuration, when adjusting the tension of the material conveying belt 1 stretched between the driving roller 2 and the driven roller 4, when the bolt 3 is tightened, the pressing member 12
The detector 1 moves against the pressing force of the compression spring 10.
However, since the pressing force of the compression spring 10 is strong, the bolt 3 gradually moves toward the detector 11 by a very small amount. Therefore, it is possible to obtain a state in which the tip of the bolt 3 and the roller support member 14 are in contact with each other, so that the movable piece 15 screwed onto the bolt 3 moves even as the bolt 3 moves toward the detector 11. On the other hand, it moves in the direction away from the detector 11, that is, in the direction in which the material conveying belt 1 is stretched. Therefore, when the bolt 3 continues to be turned toward the detector 11 and the first detection part 16 and the pressing member 12 come into contact with each other, the blue lamp lights up on the display 13, and the material conveying belt moves to the driving roller 2 and the driven roller 4. Indicates that the wire has been tensioned at the appropriate tension state through the wire. Also,
If the bolt 3 is continued to be turned in the tightening direction until the second detection section 17 and the pressing member 12 come into contact with each other, a red lamp lights up on the display 13. If this red lamp lights up, it means that the tension on the material conveying belt is too strong and is not in the correct condition.Turn bolt 3 in the loosening direction until the indicator changes from red to blue to set the appropriate tension. Just set it.

[Effects of the invention] According to the invention, the roller support member includes a first detection section that operates when the tension of the material conveying belt is in an appropriate state, and a first detection section that operates when the tension of the material conveying belt is in an excessive state. It is equipped with a second detection part and a compression spring that presses outward the tip of the bolt screwed into the movable piece, and when the bolt is turned in the tightening direction, the tip position of the bolt is slightly changed due to the pressing force of the compression spring. The bolt tip and the roller support member can be moved gradually by a certain amount, and the bolt tip and the roller support member can be brought into contact with each other as in the conventional method, and the moving piece can be moved outward, so by operating the bolt, At the same time as adjusting the movement of the driven roller, it is possible to adjust the tension of the material conveying belt while checking it on the display. Therefore, it has the excellent effect of being able to set the appropriate tension of the material conveying belt constant and efficiently.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional material feeding device, Fig. 2 is a side view of a planer equipped with the material feeding belt tension display device of the present invention, and Fig. 3 is a driven roller section of the material feeding device of the present invention. FIG. In the figure, 1 is a material conveying belt, 2 is a driving roller, 3 is a bolt, 4 is a driven roller, 10 is a compression spring, 11 is a detector, 12 is a pressing member, 13 is an indicator, 14 is a roller support member, 15 is a moving piece.

Claims (1)

[Scope of utility model claims] A drive roller and a driven roller supported at both ends of a roller support member, a material feeding belt stretched between the outer peripheries of both rollers, and a material feeding belt that supports the driven roller and is slidably supported by the roller support member. It consists of a moving piece and a bolt that is screwed into the moving piece and has its tip abutted against the roller support member, and by operating the bolt, the distance between the two rollers is changed to adjust the tension of the material conveying belt. In a plane machine equipped with a material feeding device above a material feeding table, a pressing member is fixed to the tip of the bolt, a compression spring is disposed between the pressing member and the roller support member, and the material feeding belt is properly adjusted. A detector is provided, which includes a first detection section that is activated by contacting the pressing member when the belt is under tension, and a second detection section that is activated when the material conveying belt is in a state where the tension exceeds the appropriate tension. A device to display the tension of the material conveying belt on a plane machine.