JPS62136315A - Band saw - Google Patents

Abstract

PURPOSE:To permit a workpiece to be cut at right angel as well as obliquely thereby to improve a working function of a band saw, by providing the surface of a bed with a swiveling mechanism capable of swiveling the entire machine at an arbitrary angle about the axis of a turning center. CONSTITUTION:A bed 1 having a saw frame 3 placed on it is swivelingly mounted on the axis center 8 of a swivel shaft fixed on a base plate B. There is provided on the bed 1 a roller type feed mechanism comprising a pair of confronting vertical rollers 4a, 4b disposed adjacent to a vise comprising jaws 4a, 4b, the feed mechanism being displaced to the right and left directions. A swivel handle 8d is turned to swivel the bed 1 at a desired angle with respect to a workpiece W. Then, a pinch roller type feed mechanism is displaced to the left by a displacement handle 5e. The workpiece W is gripped by the jaws 4a, 4b and the roller 5a and it is cut obliquely by a band saw S.

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 capable of cutting a workpiece not only at right angles but also 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 in which cuts were made in the work material held between HSS on a bed.

However, with this method, as the diagonal cutting angle increases, the distance between the clamping position of the workpiece by the vise and the cutting position on the saw blade increases, causing vibrations in the workpiece during cutting. In addition to the disadvantage of not being able to make good cuts, there were some other problems.

In order to solve the above-mentioned drawbacks and problems, the present 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 rotated horizontally at any angle around a predetermined rotation center, and In addition to the normal vise (main vise) mechanism, there is an auxiliary vise adjacent to the vise mechanism that can move horizontally on the bed. He proposed a band saw machine that was configured to hold the workpiece at three points and was capable of making diagonal cuts at arbitrary angles while maintaining a constant positional relationship between the main vise and the band saw blade. -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 far more common than diagonal cutting operations. Although the structure based on the above-mentioned Japanese Patent Publication No. 51-48306 has significantly improved diagonal cutting work, it is necessary to provide an auxiliary vise on the bed, which is not substantially useful in right-angle cutting work, which occupies more of the work. This makes it 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 was installed on the bed, and a full-fledged automatic material feeding device was installed separately at the rear of the machine. There were some practical problems, such as:

The present invention has been made in view of the above, and by providing on the bed 1 an automatic feed mechanism for material useful in right-angle cutting work, without providing an auxiliary vise exclusively for diagonal cutting work, the remaining material is shortened. The object of the present invention is to provide a band saw machine whose entire machine is compact and inexpensive, and which, like Japanese Patent Publication No. 51-48306, can perform good diagonal cutting without vibration of the workpiece.

Means for Solving the Problems> The structure for achieving the above object will be described with reference to FIGS. 1 to 4, which are embodiment drawings.
Supporting a pair of saw wheels 3.3 on which the band saw blade S is stretched,
A saw frame 2 mounted on a vertical guide mechanism such as columns 6a and 6b established on the bed 1 or an arcuate guide mechanism such as a hinge fixed to one side of the bed, and a saw frame 2 disposed on the bed 1. It consists of a vice mechanism that clamps the workpiece W by a pair of wheels I-4a + 4b, and a pair of opposing vertical rollers 5a and 5b provided on the bed 1 adjacent to the vice mechanism. A pinch roller type feeding mechanism that feeds out the workpiece W by rotating at least one roller with the cutting material W in between, a displacement mechanism that displaces the pinch roller type feeding mechanism from side to side, and wheels 7... 7
Alternatively, it has a sliding surface on the lower surface of the bed 1, and is equipped with a turning mechanism that can turn the entire machine horizontally at any angle around a predetermined turning center 8, and when cutting the workpiece W diagonally, the entire machine is rotated and the vertical rollers 5a, 5b are displaced, and one of the vertical rollers and the pair of jaws 4a are rotated.
, 4b, it is characterized by being constructed so that three points can be settled and 1η.

(Function) 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 morph 5C. , the work material W can be automatically sent out.

During diagonal cutting, as shown in Fig. 4, the turning mechanism turns the entire machine around the turning center 8, and by displacing the pinch roller type feed mechanism, the workpiece W is placed in the vise. The band saw blade S can be pinched at three points by the jaws 4a, 4b 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 vice 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> Embodiments 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 arrows 1--2. Note that FIGS. 1 to 3 show the state in which a right-angle cut is being made.

The saw frame 2, which is slidably mounted on a main column 6a and a sub-column 6b provided upright on the bed 1, is supported by a hydraulic cylinder 6C, and is raised and lowered by the drive of this hydraulic cylinder 6C. .

A pair of saw wheels 3.3 are supported on the saw frame 2, and the band saw blade S is rotated between the saw wheels 3.3, and the traveling motion is caused by a motor 3a that rotationally drives one of the saw wheels 3. Given.

The bed 1 is provided with a vice consisting of a fixed jaw g-4a and a movable jaw 4b opposed to the fixed jaw g-4a.

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. The vertical roller 5a on the driving side can be rotated by the motor 5c via the transmission mechanism 5g, and the vertical roller 5b on the driven side can be rotated by the vertical roller 5 on the driving side by the cylinder 5d.
It is possible to move forward and backward with respect to a. This pinch roller type feeding mechanism has a screw shaft 5f screwed into its base, and the entire feeding mechanism can be displaced left and right with respect to the bed 1 by rotating the displacement handle 5e. Vise di=14a and drive side! A length measuring roller 9 for detecting the amount of feed of the work material W is disposed between the straight roller 5a and the straight roller 5a.

On the lower surface of the bed 1, wheels 7 are provided at each of the four corners, and a pivot shaft 8a that projects downward is provided. The pivot shaft 8a is rotatably inserted into a pivot bearing 8b fixed to the bed plate B, and forms a pivot center 8 of the bed 1.

The pivot shaft 8a is located at the jaw 4a on the fixed side of the vise.
It is almost vertically below the center of the small radius in front of the inner side. Further, on the upper surface of the base plate B, a ring 8 centered on the pivot center 8 is provided.
c is fixed and a chain is hung between it and the sprocket 8e at the bottom of the swing handle 8d provided at the front of the bed 1, so by turning the swing handle 8d,
The bed 1, and therefore the entire machine, can be pivoted by any angle on the platform iB about the pivot center 8.

According to the above-described embodiment of the present invention, when performing a right-angle cut, as shown in FIG. Keep them on the same plane. This results in
If the driven side vertical roller 5b is advanced by the cylinder 5d and the workpiece W is sandwiched between it and the driving side vertical roller 5a, and the driving side vertical roller 5a is rotated in this state, the workpiece W can be sent forward. I can do it. 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 the required 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 bed 1 by a desired angle with respect to the workpiece W about the turning center 8. Then, use the displacement handle 5e to displace the pinch roller type feeding mechanism to the left so that the line connecting the eight inner front surfaces of the fixed-side gear 4a of the vise and the vertical roller 5a forms the above-mentioned desired angle. The vertical roller 5b is largely displaced to the left. In this state, the workpiece W is placed, and the movable jaw 4b of the vice is moved to the right by the cylinder 4c. As a result, the workpiece W is pinched at three points by the pair of jaws 4a, 4b of the vise and the drive-side vertical roller 5a, and at the same time is tilted at a predetermined angle with respect to the bandsaw blade S. Become.

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 fixed side of the vise El-4a, the position of the material will shift to the left or right in both right-angle and diagonal cuts. Never.

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 a material feeding device installed before and after the machine, as in the conventional method, but there is no problem in practical use since there is very little diagonal cutting work.

In the above embodiment, the saw frame 2 is the main column, the sub column 6a,
Although an example in which the saw frame 2 is supported by a vertical guide mechanism provided by the saw frame 6b is shown, the present invention can also be applied to a type of band saw machine in which the saw frame 2 is supported by an arcuate guide mechanism such as a hinge fixed to one side of the bed 1. Of course, it is possible to apply Furthermore, it goes without saying that a sliding surface may be used instead of the wheels 7 as a turning mechanism for the bed plate B for turning the bed l.

<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 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 bottom 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 the diagonal cutting, the workpiece W is held in the vise. -43.

4b and one vertical roller 5a of the pinch roller type feed mechanism, it is configured to settle at three points.
It is possible to perform diagonal cutting without installing an auxiliary vise exclusively for diagonal cutting on the bed as in Japanese Patent Publication No. 51-48306, and an automatic feeding mechanism for the workpiece W useful in right-angle cutting work is provided. In other words, the functionality of right-angle cuts, which account for the overwhelming majority of cutting operations with band saws, has been greatly improved, the remaining material is shorter, the entire machine is more compact, and the machine is cheaper. At the same time, it is also possible to perform diagonal cuts when necessary. It also offers versatility and can be easily performed in good condition, just like the conventional method.

[Brief explanation of drawings]

1, 2, and 3 are a front view, a plan view, and an I [I −
11 [This is an arrow view. FIG. 4 is a plan view showing the embodiment of the present invention in a diagonally cut state. ■--Bed 2-Saw frame 3.3--Saw boiler 4a--Fixed side jaw 4b--Displacement side jaw 40--Cylinder 5a---Drive side vertical roller 5b--Driven side vertical Roller 5c--Motor 5cL--Cylinder 5e-Displacement handle 5''--Screw shaft 6a--Main column 6b--Sub-column 7-7...Wheel 8-Swivel center 8a...Swivel Shaft 8b - Swivel bearing 8c -- Ring 8d - Swivel handle 8e Sprocket s - Band saw blade Figure 1

Claims (1)

[Claims] A saw frame that supports a pair of saw wheels on which band saw blades are stretched 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. , a vice mechanism that clamps the workpiece by a pair of jaws disposed on the bed, and a pair of opposing vertical rollers that are disposed on the bed adjacent to the vice mechanism, and the workpiece is a pinch roller type feed mechanism that feeds out the work material by rotating at least one roller with the wheels in between; a displacement mechanism that displaces the pinch roller type feed mechanism from side to side; It is equipped with a turning mechanism that can turn the entire machine horizontally at any angle around a predetermined turning center, and when diagonally cutting a workpiece, the entire machine is turned and the vertical rollers are displaced. , by one of its vertical rollers and a vice mechanism consisting of the pair of jaws,
A band saw machine configured to be able to clamp at three points.