JPH0536162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a band saw machine, and more particularly to a band saw machine that can cut a workpiece at a right angle as well as at an angle if necessary.

<Prior art> Conventionally, as an example of the configuration of a band saw machine capable of diagonal cutting, the entire saw frame supporting a saw wheel with a band saw blade suspended thereon is pivoted around a column supporting the saw frame, and in this state, There was a method of making cuts in the workpiece held in a vise on the bed. However, with this method, as the diagonal cutting angle increases, the distance between the position where the workpiece is held by the vise and the cutting position by the saw blade increases, which causes vibrations in the workpiece during cutting, making it difficult to cut properly. In addition to the drawback of not being able to do so, there were several other problems.

In order to solve the above-mentioned drawbacks and problems, the applicant has already constructed a machine that is equipped with wheels etc. on the underside of the bed so that the entire machine can be turned horizontally at any angle around a predetermined turning center, and In addition to the normal vise (main vise) mechanism, an auxiliary vise that can move horizontally on the bed is installed adjacent to the vise mechanism. We have proposed a band saw machine that is configured to hold the workpiece at three points and can make diagonal cuts at any angle while maintaining a constant positional relationship between the main vise and the band saw blade. −
No. 48306).

<Problems to be Solved by the Invention> Incidentally, in the cutting operations performed by a bandsaw machine, in general, right-angle cutting operations are overwhelmingly more common than oblique cutting operations. Although the structure based on the above-mentioned Japanese Patent Publication No. 51-48306 has dramatically improved diagonal cutting work, it is necessary to provide an auxiliary vise on the bed, which is not really useful for right-angle cutting work, which is more common. Therefore, it is difficult to provide an automatic material delivery mechanism on the bed that is useful in right-angle cutting operations. For this reason, only a simple manual material feeding mechanism could be installed on the bed, and a full-fledged automatic material feeding device was installed separately at the rear of the machine, but this not only resulted in a longer amount of material remaining, but the equipment was also expensive. There were some practical problems.

The present invention has been made in view of the above, and by providing an automatic feed mechanism for material useful in right-angle cutting work on the bed, without providing an auxiliary vise exclusively for diagonal cutting work, the remaining material is shortened and machined. The whole thing is compact and cheap, and
Similar to Japanese Patent Publication No. 51-48306, the purpose of this invention is to provide a band saw that can perform good diagonal cutting without causing vibration of the workpiece.

<Means for Solving the Problems> The configuration for achieving the above object will be explained with reference to FIGS. 1 to 4, which are embodiment drawings. A saw that supports a pair of saw wheels 3, 3 and is mounted on a vertical guide mechanism such as columns 6a, 6b established on the bed 1 or an arcuate guide mechanism such as a hinge fixed to one side of the bed. A frame 2, a vice mechanism that holds the workpiece W between a pair of jaws 4a and 4b arranged on the bed 1, and a pair of opposing vertical rollers provided on the bed 1 adjacent to the vice mechanism. 5a and 5b, and by rotating at least one roller with the workpiece W in between, the workpiece W is
It has a pinch roller type feed mechanism that feeds out the pinch roller type feed mechanism, a displacement mechanism that displaces the pinch roller type feed mechanism left and right, and wheels 7...7 or a sliding surface on the lower surface of the bed 1, and the entire machine is rotated around a predetermined turning center 8. The machine is equipped with a turning mechanism that can horizontally turn at any angle, and when diagonally cutting the workpiece W, the entire machine is turned and the vertical rollers 5a and 5b are displaced, and one of the vertical rollers and the pair of vertical rollers are moved. With the vice mechanism consisting of the jaws 4a and 4b, 3
It is characterized by being configured so that it can be held between points.

<Operation> As shown in Fig. 2, in right-angle cutting work, the work material W is sandwiched between a pair of vertical rollers 5a and 5b of the pinch roller type feed mechanism, and one of the rollers is rotated by the motor 5c. , the work material W can be automatically sent out.

During diagonal cutting, as shown in Fig. 4, the entire machine is rotated around the rotation center 8 by the rotation mechanism, and the work material W is moved by displacing the pinch roller type feed mechanism. The band saw blade S can be clamped at three points by the jaws 4a and 4b of the vise and one of the vertical rollers 5a of the pinch roller type feed mechanism, and diagonal cutting can be performed while keeping the distance between the vise and the band saw blade S constant. However, at this time, the pinch roller type feeding mechanism is not used for feeding the workpiece W.

<Example> Examples of the present invention will be described below based on the drawings.

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a view taken along the - arrow. Note that FIGS. 1 to 3 show the state in which a right-angle cut is being made.

Main column 6 installed upright on bed 1
The saw frame 2, which is slidably mounted on the sub-column 6b, is supported by a hydraulic cylinder 6c, and is raised and lowered by driving the hydraulic cylinder 6c. The saw frame 2 includes a pair of saw wheels 3,
3 is supported, and the band saw blade S is wound between the saw wheels 3, 3, and is given traveling motion by a motor 3a that rotationally drives one of the saw wheels 3.

The bed 1 is provided with a vice consisting of a stationary side jaw 4a and a movable side jaw 4b opposed thereto that is moved by a cylinder 4c. At the rear of the vice, a pinch roller type feed-out mechanism is provided, which includes vertical rollers 5a and 5b on the driving side and the driven side, which are provided to face each other. Drive side vertical roller 5a
can be rotated by the motor 5c via the transmission mechanism 5g, and the vertical roller 5b on the driven side
The driving side vertical roller 5a is driven by the cylinder 5d.
You can move forward and backward. This pinch roller type feeding mechanism has a screw shaft 5f screwed into its base, and by rotating the displacement handle 5e, the entire feeding mechanism can be displaced left and right with respect to the bed 1. vice jiyo 4a
A length measuring roller 9 equipped with a rotary encoder is disposed between the drive-side vertical roller 5a and the length measuring roller 9 for detecting the amount of feed of the workpiece W.

On the underside of the bed 1, there are wheels 7 at each of the four corners.
is provided, and a pivot shaft 8a that projects downward is provided. The pivot shaft 8a is connected to the base plate B.
It is rotatably inserted into a pivot bearing 8b fixed to the bed 1, and forms a pivot center 8 of the bed 1. The pivot shaft 8a is located approximately vertically below the center of the small radius on the inside front of the jaw 4a on the fixed side of the vice. In addition, under the conditions of the bed plate B, a ring 8c centered on the pivot center 8 is fixed, and the bed 1
Since a chain is hung between the swing handle 8d provided on the front surface of the machine and the sprocket 8e at the bottom, by turning the swing handle 8d, the bed 1, and therefore the entire machine, can be rotated around the swing center 8. It can be rotated by any angle on plate B.

According to the above-described embodiment of the present invention, when making a normal right-angle cut, as shown in FIG.
It is positioned almost on the same plane as the inner surface of the stationary side jaw 4a. As a result, the driven side vertical roller 5
b is advanced by the cylinder 5d, the workpiece W is sandwiched between the drive-side vertical roller 5a, and the drive-side vertical roller 5a is rotated in this state, the workpiece W can be sent forward. . At this time, by detecting the amount of feed by the length measuring roller 9, it is possible to control the work material W to be automatically fed by a predetermined amount.

Next, the case of performing diagonal cutting work will be described. FIG. 4 is a plan view showing the state during diagonal cutting work. Turn the turning handle 8d to turn the head 1 by a desired angle with respect to the workpiece W about the turning center 8. And Jiyo 4 on the fixed side of the vise
Adjust the displacement handle 5e so that the line connecting the R surface on the inside front side of a and the vertical roller 5a is at the desired angle.
As a result, the pinch roller type feeding mechanism is displaced to the left, and the driven vertical roller 5b is largely displaced to the left. In this state, the workpiece W is placed, and the moving side jaw 4b of the vice is moved to the right by the cylinder 4c. As a result, the workpiece W is moved between the pair of jaws 4a and 4b in the vise and the driving side vertical roller 5a.
As a result, the band saw blade S is held at three points, and at the same time is tilted at a predetermined angle with respect to the band saw blade S. If the band saw blade S is run in this state and the saw frame 2 is lowered, the workpiece W will be diagonally cut at a desired angle. At this time, the positional relationship between the vise and the bandsaw blade S is maintained in substantially the same state as when cutting at right angles, and no vibration is generated in the workpiece W. In addition, if the turning center 8 is set almost vertically below the center of the small radius on the inside front of the jaw 4a on the fixed side of the vise, the position of the material will not shift to the left or right when cutting at right angles or diagonally. do not have. Note that in the case of diagonal cutting, the vertical roller 5a is used only as an angle ruler and not as a pinch roller type feeding mechanism. At this time, the work material W is fed by hand or by separate material feeding devices at the front and rear of the machine, as in the conventional method, but there is no problem in practice since the diagonal cutting work is very rare.

In the above embodiment, an example was shown in which the saw frame 2 was supported by a vertical guiding mechanism formed by the main and sub-columns 6a and 6b, but an arcuate guiding mechanism by a hinge etc. fixed to one side of the bed 1 Of course, the present invention can also be applied to a band saw machine of a type in which the saw frame 2 is supported by a saw frame 2. Furthermore, it goes without saying that a sliding surface may be used as the turning mechanism for the bed plate B for turning the bed 1, instead of using the wheels 7...7.

<Effects of the Invention> As explained above, according to the present invention, a roller type feeding mechanism consisting of a pair of opposing vertical rollers 5a and 5b provided on the bed 1 adjacent to a vice consisting of the jaws 4a and 4b is provided. The bed 1 is movable in the left and right direction, and a turning mechanism such as wheels 7 is provided on the lower surface of the bed 1 to turn the entire machine at any angle about the turning center 8. Diagonal cutting is possible by turning, and when performing diagonal cutting, the workpiece W is placed in the jaw 4 of the vise.
A, 4b and one of the vertical rollers 5a of the pinch roller type feed mechanism are configured to pinch the material at three points, so an auxiliary vise dedicated to diagonal cutting as in Japanese Patent Publication No. 51-48306 is provided on the bed. This provides an automatic feeding mechanism for the workpiece W that is useful in right-angle cutting work while also allowing diagonal cutting without any problems. In other words, the functionality of right-angle cuts, which account for the overwhelming majority of the cutting work performed by band saws, has been greatly improved, the remaining material is shorter, the entire machine is more compact and cheaper, and at the same time it can also be used for diagonal cutting when necessary. It also offers versatility and can be easily performed in good condition, just like the conventional method.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are a front view, a plan view, and a view taken along the - arrow, respectively, showing an embodiment of the present invention in a right-angled cut state. FIG. 4 is a plan view showing the embodiment of the present invention in a diagonally cut state. 1...Bed, 2...Saw frame, 3,3...
Saw wheel, 4a... fixed side jaw, 4b... moving side jaw, 4c... cylinder, 5a... driving side vertical roller, 5b... driven side vertical roller, 5c...
...Motor, 5d...Cylinder, 5e...Displacement handle, 5f...Screw shaft, 6a...Main column, 6b
...Subcolumn, 7...7...Wheel, 8...Swivel center, 8a...Swivel axis, 8b...Swivel bearing, 8c...
...Ring, 8d...Swivel handle, 8e...Sprocket, S...Band saw blade.

Claims (1)

[Claims] 1 A saw that supports a pair of saw wheels on which a band saw blade is suspended and is mounted on a vertical guide mechanism such as a column established on the bed or an arcuate guide mechanism such as a hinge fixed to one side of the bed. It consists of a frame, a vice mechanism that clamps the workpiece by a pair of jaws arranged on the bed, and a pair of opposing vertical rollers installed on the bed adjacent to the vice mechanism. A pinch roller type feed mechanism that feeds out the work material by rotating at least one roller with the material in between; a displacement mechanism that displaces the pinch roller type feed mechanism from side to side; It has a turning mechanism on the bottom surface that can turn the entire machine horizontally at any angle around a predetermined turning center, and when diagonally cutting the workpiece, turns the entire machine and displaces the vertical rollers. A band saw machine is constructed so that it can be clamped at three points by one of its vertical rollers and a vice mechanism consisting of the pair of jaws.