JPS6241764Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a machining margin detection device for detecting machining margin on workpieces in a plane machine.The purpose is, for example, when cutting multiple workpieces to the same size, It is an object of the present invention to provide a cutting margin detection device for a plane machine which can detect fluctuations and instruct the cutting margin for each workpiece.

Next, an embodiment of the present invention will be explained with reference to the drawings. It is supported so as to be movable up and down through holes 2 erected on both sides of the board K, and can be adjusted up and down by rotating a handle (not shown).

Reference numeral 3 denotes a main frame which is placed horizontally on the upper end of the pole 2 and arranged in parallel above the table 1, and near the central part of the main frame in the longitudinal direction, a planer body 4 equipped with a rotary blade 4a is reversibly mounted horizontally. ing.

Reference numeral 5 denotes a scale rod fixed to the table 1 to display the distance between the cutting surface S at the lower end of the cutting edge circle of the rotary blade 4a and the table 1.

Reference numeral 6 denotes a detection piece attached to the lower end near the center of the front end surface 3a of the main frame 3 with a screw 7 in order to detect the position of the upper surface W1 of the workpiece W and instruct the cutting margin. On the other hand, the detection piece 6 is pivoted so that it can swing in a vertical plane direction orthogonal to the transport direction of the workpiece W using the base end as a swing fulcrum, and can be returned to its original state by its own weight. In between, there is a front end surface 3 in order to define the swing range of the detection piece 6.
A through hole 6 into which a guide pin 8 protruding from a is inserted.
a is inserted in the shape of a vertically elongated circular arc hole, and a contact portion 6b with a substantially hook-shaped cross section is capable of sliding contact with the upper surface W1 of the workpiece W on the lower edge of the detection piece 6 below the through hole 6a. Further, at the tip of the detection piece 6, a pointed pointer 6c is formed to indicate the amount of swing of the detection piece 6. The contact portion 6b is connected to the swing fulcrum of the detection piece 6 and the pointer portion in order to displace the pointer portion 6c while amplifying the amount of displacement of the contact portion 6b by an appropriate number of times, thereby amplifying the amount of displacement of the pointer portion 6c. 6c, the contact part 6c is displaced following the fluctuation of the upper surface W1 of the workpiece W, and the pointer part 6c is arranged close to the swinging fulcrum point between the contact part 6b and the pointer. The displacement is amplified by a magnification corresponding to the ratio to the swing radius of the portion 6c.

9 is a scale plate attached to the front end surface 3a of the main frame 3 facing the pointer part 6c in order to display the amount of swing of the detection piece 6, and the upper surface W1 of the workpiece W is the cutting surface of the rotary blade 4a. When it matches S, a scale O is displayed at the position indicated by the pointer 6c, and the upper surface W of the workpiece W is displayed with the cutting surface S as a reference.
1 has a difference of 1 mm, 2 mm, or 3 mm, for example, the scales 1 and 1 are placed at the positions indicated by the pointer 6c, respectively.
2 and 3 are displayed, and when the detection piece 6 comes into contact with the upper surface W1 of the work W, the cutting surface S and the work W
The distance l from the top surface W1, that is, the cutting margin, is indicated by each scale 0 to 3 that amplifies this distance l, while the table 1 is moved and adjusted to measure the top surface W of the workpiece W.
1 is adjusted by moving up and down, and when the pointer portion 6c of the detection piece 6 is brought into alignment with an arbitrarily set scale, the workpiece W is cut with a cutting margin corresponding to the set scale.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, the front end surface 3a of the main frame 3 on which the planer barrel 4 is rotatably supported shows the position of the upper surface W1 of the work W being transferred on the table 1 arranged below the main frame 3. A detection piece 6 provided for detection is pivoted so that it can swing in a vertical plane direction orthogonal to the direction of transport of the workpiece W, using the base end of the detection piece 6 as a swinging fulcrum, and can return by its own weight. A pointer portion 6c is formed at the tip of the sensing piece 6 to indicate the amount of swing of the sensing piece 6, and a pointer portion is formed at the lower edge of the sensing piece 6 to amplify the amount of displacement of the pointer portion 6c. A contact portion 6b disposed near the pivot point between the pivot point 6c and the swing pivot point is formed to protrude so as to be able to come into sliding contact with the upper surface W1 of the workpiece W.

For this reason, variations in the top surface position between each workpiece to be cut, that is, variations in the thickness of the workpieces, are sensitively detected, and the variations are magnified by the displacement amount of the pointer 6c of the detection piece 6 and clearly indicated. In addition, when cutting each workpiece to a constant thickness, it is possible to detect the machining margin of each workpiece that changes as the thickness of each workpiece W changes, for example, if the machining margin exceeds the appropriate cutting amount for the workpiece W. Sometimes, in order to allocate this machining margin to a machining margin that can be properly cut and perform repeated cutting, fluctuations in the machining margin can be dealt with by moving and adjusting the position of the upper surface W1 of the workpiece W up and down according to the instructions from the detection piece 6. This eliminates overload on the rotary blade when cutting a cutting margin that exceeds the appropriate cutting amount, and optimizes cutting conditions.
This has the effect of equalizing the cutting condition of the surface to be cut of the workpiece W.

In addition, the detection mechanism for detecting variations in machining allowance can be made more compact and simplified, and the amplification ratio of the detected amount can be significantly increased to improve detection accuracy.

That is, in the present invention, a detection piece is provided on the front end surface of the main frame on which the plane barrel is rotatably supported, in order to detect the upper surface position of the workpiece being transferred on the table arranged below the main frame. The detection piece is pivoted so that it can swing in a vertical plane direction perpendicular to the workpiece transfer direction using the base end of the detection piece as a swinging fulcrum, and can be returned to its original state by its own weight. A pointer part is formed for indicating the amount of swing of the sensing piece, and a swing fulcrum is formed between the pointer part and the swing fulcrum in order to amplify the amount of displacement of the pointer part on the lower edge of the detection piece. By forming the abutting portions disposed closer to each other so as to protrude so as to be able to come into sliding contact with the upper surface of the workpiece, it is possible to easily and accurately detect changes in the dimensions of the workpiece and changes in machining allowance associated with these dimensional changes. This has the effect of making the mechanism for detecting changes in machining allowance compact and simple, and further increasing the amplification ratio of the detected amount significantly to improve detection accuracy.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic front view of the main parts of the planer, and FIG.
- An enlarged X-ray sectional view, FIG. 3 is an enlarged front view of the detection piece, and FIG. 4 is a sectional view taken along the line Y--Y in FIG. 3. 1...Table, 3...Mainframe, 4a
...Rotating blade, 6...Detection piece, S...Cutting surface, W...
...Work, W1...Top surface.

Claims (1)

[Scope of utility model registration request] A detection piece is installed on the front end surface of the main frame on which the plane barrel is rotatably supported to detect the upper surface position of the workpieces being transferred on a table arranged below the main frame. The base end is used as a swinging fulcrum, and it is pivotable so that it can swing in a vertical direction perpendicular to the workpiece transfer direction and can return to its original position by its own weight, and the tip of the detection piece indicates the amount of swing of this detection piece. In addition to forming a pointer section for
The lower end edge of the detection piece has an abutting portion disposed between the pointer and the swinging fulcrum near the swinging fulcrum in order to amplify the amount of displacement of the pointer. A cutting margin detection device for a planer machine, characterized in that it is formed in a protruding manner so that it can be touched.