JPH0288140A - Positioning ruler for work - Google Patents

Abstract

PURPOSE:To secure a stable reciprocating movement, to increase a load resistant force as well and to easily secure a specified working accuracy by making a slide rod movable with a ruler unit and supporting it movably via a pair of sliding bearings. CONSTITUTION:When a driving motor 41m is actuated, a feeding screw shaft 36 is rotated to screw a nut bracket 35. The nut bracket 35 is freely movably supported via a slide bearing 34, so a ruler unit 20 can be moved to the right and left via a ruler base 31 which is integrated with a slide rod 33. The slide rods 33, 33 are supported by a pair of bearings 34, 34 at their two places apart in specified distance, so they are moved extremely stably, and a ruler plate 21 can be positioned and set stably by a driving motor 41m.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a workpiece positioning ruler for setting the processing position of a workpiece in various processing machines for woodworking or metal processing.

Prior Art When performing cutting on workpieces such as wood or metal materials, a position regulating device is required to accurately position and regulate the position of the workpiece relative to the tool in order to obtain a processed product with the required dimensions. It is.

This position regulating device is capable of high-precision positioning so that predetermined parts of the workpiece can be accurately machined. It is necessary to have high rigidity to prevent this from occurring.

Conventionally, as a position regulating device for a workpiece, while positioning by pressing one side of the workpiece against a ruler,
There is a simple positioning ruler for processing such as cutting. This item has two slide rods fixed at both ends, and a nut bracket with a ruler unit mounted on them so that they can slide freely.
This nut bracket was driven by a feed screw shaft to move the ruler unit.

Problems to be Solved by the Invention According to such prior art, the ruler unit is supported only through a single nut bracket, which tends to make the ruler unit unstable and lack rigidity. The problem was unavoidable. In other words, when the nut bracket moves, the ruler unit may shake, and if the force applied to the ruler unit becomes large, the ruler unit may come off, making it unsuitable for high-precision machining. It had the disadvantage of being.

Therefore, an object of the present invention is to make the slide rod movable together with the ruler unit, and to make the slide rod moveable together with the ruler unit.
By movably supporting the ruler unit via a pair of sliding bearings, stable reciprocating motion of the ruler unit is ensured, and the load-bearing force of the ruler unit is increased, making it easy to ensure the specified machining accuracy. An object of the present invention is to provide a ruler for positioning a workpiece.

Means for Solving the Problems To achieve the object, the present invention has a structure in which side brackets are fixed to both ends of two parallel slide rods, and a nut bracket is fixed to the middle part of the slide rods. The nut bracket and the side bracket are connected by a ruler base, a ruler unit is fixed to the ruler base, a slide rod is movably supported by a pair of sliding bearings, and a feed screw is screwed into the nut bracket. The gist is that it has a shaft.

According to this configuration, by rotationally driving the feed screw shaft by an arbitrary drive source, the NAND bracket that is threadedly engaged with the feed screw shaft moves in the direction in which the screw advances. The nut bracket is fixed to the slide rod, and since the slide rod is movably supported by a pair of sliding bearings, the slide rod moves via the nut bracket. Side brackets are fixed to both ends of the slide rod, and the ruler base is connected to the nut bracket and the side bracket, so the ruler unit fixed to the ruler base is connected to the slide rod. , can be driven by a feed screw shaft through the side bracket, nut bracket, and ruler base.

On the other hand, the force applied to the ruler unit is distributed via the ruler base to the nut bracket and the side bracket, and is applied via the slide rod to a pair of sliding bearings that support the slide rod. In other words, the force on the ruler unit is distributed and borne by the pair of sliding bearings, so
By increasing the strength of the slide rod and the slide bearing, the load capacity of the ruler unit can be easily increased.

It works as described above.

Example Examples will be described below with reference to the drawings.

The workpiece positioning ruler 10 includes a ruler unit 20, a feed mechanism 30, a drive mechanism 40, and a base B on which these are mounted (FIG. 1).

The main members of the feed mechanism 30 are a ruler base 31, two slide rods 33.3B, a sliding bearing 34.34, a nut bracket 35, and a feed screw shaft 36.

The slide rods 33,33 are assembled horizontally parallel to each other (FIG. 2), and a nut bracket 35 is fixed to the intermediate portion thereof (FIG. 1). Both ends of the slide rods 33 and 33 are connected to the side brackets 32, respectively.
．． It is connected by 32.

The slide bearings 34.34 are disposed to sandwich the nut bracket 35, and movably support the slide rods 33.33. The plain bearings 34.34 are mounted on the base B at a predetermined distance from each other. Slide bearing 3
The distance of 4.34 is approximately 1/1 of the distance of slide rod 33.33.
2 so that the nut bracket 35 can move over the entire distance between the plain bearings 34, 34.

The ruler base 31 is disposed horizontally between the nut bracket 35 and the pair of side brackets 32, 32 so as to connect the upper end surfaces of the three in a straight line. therefore,
The ruler base 31 is connected to a slide rod 33.33 via a nut bracket 35 and a side bracket 32.32.
Fixed. In addition, a pair of side brackets 32
．． A scale rod 38 is attached to connect the lower ends of each of the scale rods 32. The scale rod 38 is provided parallel to the slide rods 33.33, and the scale rod 38 has two dogs 38c, 38c.
It is provided so that it can be moved and set freely.

Rotary bearings 37 and 37 are attached to the lower end surfaces of the slide bearings 34 and 34, respectively. The feed screw shaft 36 is screwed into the nut bracket 35, and both ends thereof are
It is rotatably supported by a rotation bearing 37.37. A timing pulley 36 is attached to one end of the feed screw shaft 36.
p and a rotating magnet 36m are attached.

The rotating magnet 36m, together with the magnetic sensor 36s attached to the base B, forms a rotary encoder for detecting the number of rotation angles of the feed screw shaft 36.

The ruler unit 20 includes a ruler plate 21 and a ruler bracket 2.
2 and a ruler arm 23 (FIGS. 1 and 2).

The ruler plate 21 is a metal plate provided with a positioning surface 21s of a predetermined area in order to obtain stable contact with the workpiece, and is attached to the ruler arm 23 via a ribbed ruler bracket 22. .

A flange 23f is formed at the base end of the ruler arm 23, and the ruler unit 20 is attached to the flange 23f.
It is fixed to the ruler base 31 by tightening bolts 3f and the ruler base 31. In order to increase the overall rigidity of the ruler unit 20 and reduce its weight, the ruler arm 23 has a box-shaped structure with a space inside, and the ruler plate 21 is made of aluminum alloy. It is better to do so.

The drive mechanism 40 includes a drive motor 41m and a motor pulley 4.
1p, a timing belt 41b, and a timing pulley 36p.

The drive motor 41m is a motor with a brake and is arranged below the base B, and the output shaft has a motor pulley 4.
1p is fixed. The timing belt 41b is wound between the motor pulley 41p and a timing pulley 36p attached to the feed screw shaft 36. The drive motor 41m is capable of rotationally driving the feed screw shaft 36 in forward and reverse directions. Note that a limit switch 38s is provided at one end of the base B, and the limit switch 38s is connected to the dog 38c of the scale rod 38,
It is operated by 38G. When the limit switch 38s is activated, the drive motor 41m is configured to stop.

The workpiece positioning device 10 having such a configuration can be attached to, for example, a bandsaw machine W (see FIGS. 2 and 3).
figure).

The band saw machine W has, on a table Wt, an introduction roll R1 and a discharge roll R2 for material T, traveling caterpillars C1 and C2 laid in two rows between them, and traveling caterpillars C1 and C2.
The material T fed in from the introduction roll R1 side is placed on traveling caterpillars C1 and C2, sent forward, and cut by the saw blade S (Fig. 3). Thereafter, it is discharged to the discharge roll R2 side (in the direction of arrow F in the figure).

The workpiece positioning device 10 is attached to the bandsaw machine W by fixing the base B to the front frame Wf of the bandsaw machine W using bolts or the like (FIG. 2). However, at this time, the positioning surface 21s of the ruler plate 21 needs to be parallel to and above the saw blade S. Also, at this time, the length of the ruler arm 23 is selected so that the ruler plate 21 is located in front of the side of the saw blade S.

Furthermore, two drags 38 provided on the scale rod 38
c and 38C are set so that the limit switches 38s operate at the backward and forward limits of the ruler unit 20, respectively. Here, the backward limit of the ruler unit 20 is the position immediately before the nut bracket 35 and the slide bearing 34 on the backward side (left side in FIGS. 1 and 3) collide, and the forward limit is the position of the ruler unit 20. This is the position immediately before the positioning surface 21s of No. 21 comes into contact with the saw blade S.

When the drive motor 41m is started, the feed screw shaft 36 rotates and the nut bracket 35 is threaded. The nut bracket 35 is fixed to a slide rod 33.33, which in turn has a sliding bearing 34.3.
4, the ruler unit 20 can be moved left and right along with the side brackets 32, 32 and the nut bracket 35 via the ruler base 31, which is integrated with the slide rod 33, 33. can do. At this time, since the ruler base 31 on which the ruler unit 20 is mounted is fixed to the slide rods 33.33, its structure has high rigidity, and the slide rods 33.33 are separated by a predetermined distance. Ta2
Since the slide rod 33.33 is supported by a pair of sliding bearings 34.34, the slide rod 33.33 can move extremely stably. That is, the ruler plate 21 can be stably positioned and set by the drive motor 41m, and its load resistance against processing pressure and the like can also be made extremely high.

In the above description, the workpiece positioning ruler 10 is
Although it is installed horizontally to the bandsaw machine W, this device can be applied to any other processing machine as needed, and the installation position can also be any direction including vertically. It can be installed and used in the following directions.

Further, the drive mechanism 40 can use any drive source instead of the drive motor 41m.

As described in detail, according to the present invention, the slide rod that supports and moves the ruler unit is movably supported by a pair of sliding bearings, so that the ruler unit can move with much higher stability. In addition to being able to perform settings, the force applied to the ruler unit is distributed between the two sliding bearings, making it possible to increase the rigidity of the ruler unit sufficiently, making it possible to effectively prevent the ruler unit from escaping. This has the advantage that a certain machining accuracy can be easily achieved.

[Brief explanation of drawings]

1 to 3 show an embodiment, in which FIG. 1 is a front view of the entire assembly, FIG. 2 is a sectional view taken along the line X--X in FIG. 1, and FIG. 3 is a plan view of the device in use. 20... Ruler unit 31... Ruler base 32... Side bracket 33... Slide rod 34... Sliding bearing 35... Nut bracket 36... Feed screw shaft

Claims (1)

[Claims] 1) Two parallel slide rods, a pair of side brackets fixed to both ends of the slide rods, a nut bracket fixed to the middle part of the slide rods, and a ruler connecting the nut brackets and the side brackets. A workpiece positioning ruler comprising a base, a ruler unit fixed to the ruler base, a pair of sliding bearings movably supporting the slide rod, and a feed screw shaft screwed into the nut bracket.