JP2640764B2 - Workpiece positioning ruler - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece positioning ruler for setting a processing position of a workpiece in various processing machines for woodworking or metalworking.

2. Description of the Related Art When cutting a workpiece such as wood or metal material, a position regulating device is required to accurately regulate the position of the workpiece with respect to the tool in order to obtain a processed product of a required size. It is.

This position regulating device can perform high-precision positioning so that a predetermined portion of a workpiece can be accurately processed, and can also be released by a processing pressure or vibration applied to the workpiece after the positioning. It is necessary that the rigidity be high so that the occurrence of the problem does not occur.

2. Description of the Related Art Conventionally, as a position control device for a workpiece, there is a simple positioning ruler that performs processing such as cutting while performing positioning by pressing one surface of a workpiece against a ruler. In this apparatus, a nut bracket on which a ruler unit is mounted is slidably provided on two slide rods having both ends fixed, and the nut bracket is driven by a feed screw shaft to move the ruler unit.

Problems to be Solved by the Invention However, according to the prior art, since the ruler unit is supported via only a single nut bracket, the ruler unit becomes unstable and the rigidity tends to be insufficient. The problem of being inevitable. That is, when the nut bracket moves, the ruler unit may run out, and when the force applied to the ruler unit increases, the ruler unit may escape, which is not suitable for high-precision machining. There was a disadvantage that it was.

In view of the above, an object of the present invention is to make the slide rod movable together with the ruler unit, and to support the slide rod movably through a pair of slide bearings, thereby ensuring a stable reciprocating movement of the ruler unit. It is another object of the present invention to provide a positioning ruler for a workpiece in which a load resistance to a ruler unit is increased and a predetermined processing accuracy can be easily secured.

Means for Solving the Problems In order to achieve the above object, according to the configuration of the present invention, a side bracket is fixed to both ends of two parallel slide rods, and a nut bracket is fixed to an intermediate portion of the slide rod. Then, after connecting this nut bracket and side bracket with a ruler base,
The gist of the invention is that a ruler unit is fixed to the ruler base, the slide rod is movably supported by a pair of slide bearings, and a feed screw shaft screwed into a nut bracket is provided.

According to this configuration, by rotating the feed screw shaft by an arbitrary drive source, the nut bracket screwed with the feed screw shaft moves in the screw advancing direction. The nut bracket is fixed to the slide rod, and the slide rod is movably supported by the pair of slide bearings, so that the slide rod moves via the nut bracket. Side brackets are fixed to both ends of the slide rod, respectively, and the ruler base is connected to the nut bracket and the side bracket.As a result, the ruler unit fixed to the ruler base ends up with the slide rod. , Can be driven by a feed screw shaft via a side bracket, a nut bracket, and a ruler base.

On the other hand, the force applied to the ruler unit is distributed to the nut bracket and the side bracket via the ruler base, and is applied via the slide rod to a pair of slide bearings supporting the slide rod. In other words, the force on the ruler unit is distributed and shared by the pair of slide bearings. Therefore, by increasing the strength of the slide rod and the slide bearing, the load-bearing force of the ruler unit can be easily increased.

 It works as described above.

Embodiments Hereinafter, embodiments will be described with reference to the drawings.

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

The feed mechanism 30 includes a ruler base 31, two slide rods 33, 33, slide bearings 34, 34, and a nut bracket 35.
And the feed screw shaft 36 as main members.

The slide rods 33, 33 are combined in parallel in the horizontal direction (FIG. 2), and a nut bracket 35 is fixed to an intermediate portion thereof (FIG. 1). Slide rod 33,
Both ends of 33 are connected by side brackets 32, 32, respectively.

The slide bearings 34, 34 are disposed so as 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. The distance between the slide bearings 34, 34 is set to about 1/2 of the slide rods 33, 33 so that the nut bracket 35 can move over the entire distance between the slide bearings 34, 34. It is.

The ruler base 31 is provided horizontally between the nut bracket 35 and the pair of side brackets 32, 32 so as to connect the upper end surfaces of the pair of side brackets 32, 32 in a straight line. Therefore, the ruler base 31 includes the nut bracket 35 and the side bracket 32,
It is fixed to slide rods 33, 33 via 32.
The scale rod 38 is attached so as to connect the lower ends between the pair of side brackets 32, 32. The scale rod 38 is provided in parallel with the slide rods 33, 33, and the scale rod 38 is provided with two dogs 38c, 38c so as to be movable.

The lower end faces of the plain bearings 34, 34 are
7, 37 are attached. The feed screw shaft 36 is screwed into the nut bracket 35, and both ends thereof are rotatable bearings.
It is rotatably supported by 37 and 37. A timing pulley 36p and a rotating magnet 36m are attached to one end of the feed screw shaft 36. Rotating magnet 36m
Form a rotary encoder for detecting the number of rotation angles of the feed screw shaft 36 together with the magnetic sensor 36s attached to the base B.

The ruler unit 20 includes a ruler plate 21 and a ruler bracket 22.
And a ruler arm 23 (FIGS. 1 and 2).

The ruler plate 21 is a metal plate provided with a positioning surface 21s having a predetermined area for obtaining stable contact with a workpiece,
It is attached to a ruler arm 23 via a ruler bracket 22 with ribs. At the base end of the ruler arm 23, a mounting flange 23f is formed, and the ruler unit 20 is fixed to the ruler base 31 by bolting the mounting flange 23f and the ruler base 31. The ruler unit 20 has a box-shaped structure having a space inside the ruler arm 23 in order to increase the overall rigidity and to reduce the weight, and the ruler plate 21 is made of aluminum alloy. Good to do.

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

The drive motor 41m is a motor with a brake, which is arranged below the base B, and has a motor pulley 41
p is fixed. The timing belt 41b includes the motor pulley 41p and the timing pulley 3 attached to the feed screw shaft 36.
It is wound between 6p. The drive motor 41m can rotate the feed screw shaft 36 in the 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 operated by the dogs 38c, 38c of the scale rod 38. When the limit switch 38s operates, the drive motor 41m stops.

The workpiece positioning device 10 having such a configuration can be attached to, for example, a band saw machine W (FIG. 2, FIG. 3).
Figure).

The band saw machine W is provided on a table Wt with an introduction roll R1 and a discharge roll R2 for the material T, traveling tracks C1 and C2 laid in two rows therebetween, and a saw blade S located between the traveling caterpillars C1 and C2. (FIG. 3), the material T fed from the introduction roll R1 is placed forward on the traveling tracks C1 and C2, cut forward by the saw blade S, and then discharged to the discharge roll R2. (In the direction of the arrow F in the figure).

The work positioning device 10 is attached to the band saw machine W by fixing the base B to the front frame Wf of the band saw machine W using bolts or the like (FIG. 2). However, at this time, it is necessary that the positioning surface 21a of the ruler plate 21 be parallel to the saw blade S. At this time, the ruler arm is set so that the ruler plate 21 is located in front of the side of the saw blade S.
A length of 23 shall be selected.

Furthermore, two dogs 38 provided on the scale rod 38
c and 38c are set so that the limit switch 38s is operated in the retreat limit and the forward limit of the ruler unit 20, respectively. Here, the retreat limit of the ruler unit 20 is determined by the nut bracket 35 and the retreat direction side (the left side in FIGS. 1 and 3).
The sliding limit is a position immediately before contact with the sliding bearing 34, and the advance limit thereof is a position immediately before the positioning surface 21s of the ruler plate 21 contacts the saw blade S.

When the drive motor 41m is started, the feed screw shaft 36 rotates, and the nut bracket 35 is screwed. The nut bracket 35 is fixed to the slide rods 33, 33. Since the slide rods 33, 33 are movably supported via slide bearings 34, 34, the ruler unit 20 includes the side brackets 32, 32. It can move to the left and right through the ruler base 31 integrated with the slide rods 33, 33 together with the nut bracket 35 and the nut bracket 35. At this time, the ruler base 31 on which the ruler unit 20 is mounted is a slide rod.
Since it is fixed to 33, 33, its rigidity as a structure is high, and the slide rods 33, 33 are supported at two places separated by a predetermined distance by a pair of slide bearings 34, 34, The slide rods 33, 33 can move very stably. That is, the ruler plate 21 can be stably set by the drive motor 41m, and can also have a very high load-bearing force against processing pressure and the like.

In the above description, the positioning ruler 10 of the workpiece is
Although attached to the band sawing machine W in the horizontal direction, this can be applied to any other processing machine if necessary, and the attachment posture thereof is also arbitrary including the vertical direction. It can be used by attaching in the direction of. The drive mechanism 40 can use any drive source instead of the drive motor 41m.

Effect of the Invention As described above, according to the present invention, the ruler unit has a significantly higher stability by movably supporting the slide rod that supports and moves the ruler unit by the pair of slide bearings. Movement setting can be performed, and the force applied to the ruler unit is distributed and burdened by the two sliding bearings, and the rigidity of the ruler unit can be sufficiently increased. Therefore, there is an excellent effect that predetermined processing accuracy can be easily realized.

[Brief description of the drawings]

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

Claims (1)

(57) [Claims] 1. Two parallel slide rods, a pair of side brackets fixed to both ends of the slide rod,
A nut bracket fixed to an intermediate portion of the slide rod, a ruler base connecting the nut bracket and the side bracket, a ruler unit fixed to the ruler base, and a pair of slides movably supporting the slide rod. A workpiece positioning ruler comprising a bearing and a feed screw shaft screwed into the nut bracket.