JP2000107930A - Cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter capable of easily positioning the cutting position of a wide sheet work or a material located lower than the height of a front vice jaw. SOLUTION: The cutter is made up of a housing 7 provided with a cutting tool 13, capable of vertical movement, a front vice device 23 provided with front vice jaws 27A, 29A, capable of longitudinally moving, a first detecting means 33 for detecting that the housing is lowered from above in order for the cutting tool to interfere with the upper faces of the front vice jaws 27A, 29A, and second and third detecting means 45, 47 for detecting that the front vice device 23 moves from the front of the cutting tool and the end faces of the front vice jaws 27A, 29A reach the positions a short distance A and (A+B) spaced apart forwardly from the position of the cutting tool. Further, an indicator lamp 55 which lights or flickers when the second and third detecting means 45, 47 are turned ON, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine for cutting a work, and more particularly, to a cutting machine which facilitates cutting positioning of a wide and thin plate work which is a material lower than the height of a front vise jaw.

[0002]

2. Description of the Related Art Conventionally, for example, a horizontal band sawing machine 101 as a cutting machine has, as shown in FIG. 5, a material feeding base 103 extending in the left-right direction in FIG. Above the base 103, a saw blade housing 105 is provided so as to be vertically movable. The saw blade housing 105 is provided with a rotatable band saw blade 107. The material feeding base 103 is provided with a front vise 109 movable in the front-rear direction (the left-right direction in FIG. 5).

At the lower end of the saw blade housing 105, for example, a limit switch 111 is provided, and at the height position of the upper surface of the front vise 109, a dog 113 is provided. Further, for example, a limit switch 115 is provided on a lower side surface of the front vise 109, and a dog 117 is provided at a position of the material feeding base 103 corresponding to the left end of the saw blade housing 105 in FIG.

Accordingly, the height of the front vise 109 can be detected by lowering the saw blade housing 105 and bringing the limit switch 111 into contact with the dog 113, and the front vise 109 moves rightward in FIG. When the limit switch 115 contacts the dog 117, it is possible to detect that the front vise 109 interferes with the saw blade housing 105.

[0005]

Incidentally, in the above-mentioned conventional technique, one of the methods is that when the saw blade housing 105 is in the interference area with the height of the front vise 109, that is, when the limit switch 111 hits the dog 113. After the contact, when the saw blade housing 105 is further below the dog 113, the front vise 109 cannot move back and forth.

Therefore, in order to align the cutting position of the wide thin work with the band saw blade 107, the operator positions the work with the front vise 109 on which the work is clamped visually, and then moves the saw blade housing 105 (band saw blade 107). When the cutting position is confirmed by lowering the cutting position, if the cutting position is shifted, the saw blade housing 105 is raised again to a position higher than the upper surface of the front vise 109, and the operation of moving the front vise 109 is repeated. Positioning could not be done easily.

As another method, the front vise 109 can be moved in either a state where the limit switch 111 is not in contact with the dog 113 or a state where the limit switch 115 is not in contact with the dog 117. ing. At this time, the method is improved by the above-described method, but it may not be possible in the trimming or the like depending on the position of the dog 117.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting machine capable of easily performing positioning for cutting a wide thin work, which is a material lower than the height of a front vise jaw.

[0009]

In order to achieve the above object, a cutting machine according to the present invention according to claim 1 is capable of moving up and down with a vertically movable housing having a cutting tool and a front vise jaw. A first vise device, first detecting means for detecting that the housing descends from above and the cutting tool interferes with the upper surface of the front vise jaw, and the front vise device moves from the front of the cutting tool to cut Second and third detecting means for detecting that the end face of the front vise jaw has reached a position slightly away from the tool position by a distance A and (A + B). It is.

Therefore, when the cutting tool is above the upper surface of the front vice jaw in the front vise device while the first detection means is OFF, the front vice device can move backward, for example, up to 30 mm from the cutting tool, and clamp the work. Pulled out forward.

When the cutting tool is below the upper surface of the front vice jaw in the front vice device while the first detection means is ON, the front vice device can approach the cutting tool under the following conditions.

(A) When the end face of the front vice jaw is separated from the cutting tool by a distance (A + B) of, for example, 80 mm, the front vice device can be moved back and forth while the third detection means is OFF, and the front vice jaw is tightened. Activate the loosening and cutting tools and cut down.

(B) The end face of the front vice jaw is between the distance (A + B) and the distance A from the cutting tool, for example, 80 mm and 1 mm.
When the distance is between 0 mm, the third detection means is in the ON state,
The front vice jaw only when clamping the work
It can penetrate within the distance (A + B).

(C) When the end face of the front vise jaw is within the distance A, for example, 10 mm or less, from the cutting tool, the second detection means is in the ON state, the front vise cannot be retracted, and is stopped. In this state, the front vice jaw cannot be loosened,
The cutting tool cannot be started, the housing cannot be lowered, and cutting cannot be performed. However, advancement of the front vise is possible.

[0015] Thus, the positioning of cutting a wide thin plate work whose material is lower than the height of the front vise jaw can be performed more easily than before.

According to a second aspect of the present invention, there is provided the cutting machine according to the first aspect, further comprising an indicator light which is turned on or blinks when the second and third detecting means are turned on. Things.

Therefore, when the third detecting means is turned on, the indicator light blinks, and when the second detecting means is turned on, the indicator light is turned on to notify the worker.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, FIG. 2 and FIG. 3, an example of a horizontal band sawing machine 1 as a cutting machine has a base 3 on a floor surface. A material base 5 is provided upright. A saw blade housing 7 as a vertically movable housing is provided on the front side (left side in FIG. 1) of the material feeding base 5. On the left and right sides of the saw blade housing 7, a rotatable drive wheel 9 and a driven wheel 11 are provided to face each other.

A band saw blade 13 as a cutting tool is wound around the driving wheel 9 and the driven wheel 11. The saw blade housing 7 is provided with a fixed saw blade guide 15 and a movable saw blade guide 17, and the tips of the fixed saw blade guide 15 and the movable saw blade guide 17 guide the band saw blade 13.

A plurality of guide rails 19 extending in the front-rear direction are laid on the base 3, and the front vise body 25 of the front vise device 23 is guided by the guide rails 19 via the slider 21. It is provided movably in the front-back direction. In the rear part (left part in FIG. 1) of the front vice body 25, a right vise 27 and a left vice 29 are provided on the right and left sides in FIG. 1, respectively. A jaw 29A is fixedly provided, and a moving cylinder 31 for moving the pre-movement vice jaw 29 in the left-right direction in FIG.

For example, a dog 33A of the first detecting means 33 is provided upright at a front left portion of the base 3 in FIG. The upper surface of the dog 33A is flush with the upper surfaces of the vice jaw 27A before fixing and the vice jaw 29A before moving. A limit switch 33B is provided at a lower portion on the left rear side of the saw blade housing 7 in FIG.

A bracket 35 is attached to the base 3 with bolts 37, and support arms 39 and 41 are attached to the bracket 35 with bolts 43.
The second and third detecting means 4 are provided on the support arms 39 and 41.
5 and 47 are provided with limit switches 45A and 47A. The limit switch 4 is provided on the side surface 29S of the pre-movement vise 29 integrated with the front vice body 25.
A dog 49 for operating 5A and 47A is provided. Therefore, the second detecting means 45 is constituted by the limit switch 45A and the dog 49, and the third detecting means 47 is constituted by the limit switch 47A and the dog 49.

With the above configuration, the saw blade housing 7 descends from above and the limit switch 33 of the first detecting means 33
When B comes into contact with the dog 33A, the first detecting means 33 is turned on.
In this state, it is possible to detect that the saw blade housing 7, that is, the band saw blade 13 interferes with the vice jaw 27A before fixing and the vice jaw 29A before moving of the front vice device 23.

When the front vice device 23 moves toward the saw blade housing 7 and the dog 49 is brought into contact with the limit switch 47A of the third detecting means 47, as shown in FIG. Distance (A + B) For example, a vise jaw 27 before fixing the front vise device 23 at a position separated by 80 mm
A, It is possible to detect that the end face of the vise jaw 29A before movement is located. Further, the front vise device 23 moves to the saw blade housing 7 side, and the second detecting means 4 is attached to the dog 49.
When the limit switch 45A of No. 5 abuts, the band saw blade 13
The front vise device 2 is located at a distance A, for example, 10 mm
Vice jaw 27 before fixation, vice jaw 2 before movement
It is possible to detect that the end face of 9A is located.

When the moving vice device 23 moves to the saw blade housing 7 side and moves to the left side in FIG. 2 by, for example, 30 mm from the band saw blade 13, it does not move further to the left side. A stopper 53 is provided via a bracket 51. The saw blade housing 7
Is provided with an indicator light 55 which is turned on or blinks when the second and third detection means 45 and 47 are operated.

With the above configuration, referring to FIGS. 4A and 4B, when the band saw blade 13 is located above the upper surfaces of the vice jaw 27A before fixing and the vice jaw 29 before moving of the front vice device 23, 1 is in the OFF state, and the front vice device 23 is located behind the band saw blade (FIG. 4).
(A) to the left), for example, up to 30 mm,
The work, which is a thin plate having a width smaller than the upper surface of the vice jaw 27A before fixing and the vice jaw 29 before moving, can be clamped and pulled out forward (to the right in FIG. 4A).

The band saw blade 13 has a vice jaw 27A before fixing,
When the upper surface of the pre-movement vice jaw 29A is also below, that is, when the first detection means 33 is in the ON state, the front vice device 23 can approach the band saw blade 13 under the following conditions.

(1) When the distance X between the end face of the vice jaw 27A before fixing and the vice jaw 29A before moving and the band saw blade is a distance (A + B), for example, 80 mm or more (X ≧ 80), the third detecting means 47 is OFF. Front vise device 23 in state
Can move forward and backward, tighten and loosen, and can also activate the band saw blade 13 and lower the saw blade housing 7,
It can be cut into workpieces.

(2) When the distance X between the end face of the vice jaw 27A before fixing and the vice jaw 29A before moving and the band saw blade 13 is less than the distance (A + B), for example, 80 mm and exceeds the distance A, for example, 10 mm (10 < (X ≦ 80), the third detecting means 47 is in the ON state, the indicator light 55 blinks, and the front vise device 23 enters the saw blade housing 7 in order to move the fixed saw blade guide to the width of the work. The workpiece 15 is clamped by the fixed vice jaw 27A and the vice jaw before movement 29A so that the workpiece can be inserted into the work within 80 mm. At this time, loosening of the front vise device 23 is opened slightly (about 15 m between timers).
m). The front vise device 23 can start the band saw blade 13 and lower the saw blade housing 7 by tightening, and can cut the work.

(3) When the front vice device 23 is further retracted, the distance X between the end face of the vice jaw 27A before fixing and the vice jaw 29A before moving and the band saw blade 13 is smaller than the distance A (for example, 10 mm) (X ≦ 10) At that time, the second detecting means 45 is turned on, the indicator light 55 is turned on, and the retreat is stopped. In this state, the front vice device 23 cannot be loosened, and the band saw blade 13 is activated, the saw blade housing 7 is lowered,
The band saw blade 13 cannot be lowered rapidly, and cannot be cut into a work. However, the front vise device 23 can move forward.

When the indicator light 55 flashes or lights up, the operator can be informed that the third and second detecting means 47 and 45 are operating, and the operator can take various measures. .

Therefore, it is possible to easily perform positioning for cutting a wide thin work piece which is a material lower than the height of the vice jaw 27A before fixing and the vice jaw 29A before moving than before.

The present invention is not limited to the above-described embodiment of the present invention, but can be embodied in other forms by making appropriate changes. In the present embodiment, a horizontal band saw machine has been described as an example of a cutting machine. However, a circular saw machine or another cutting machine may be used.

[0035]

As can be understood from the above description of the embodiment of the invention, according to the first aspect of the present invention, the cutting tool is set to the front vice jaw in the front vice device when the first detection method is OFF. When it is above the upper surface of the cutting tool, the front vise device can move backward, for example, up to 30 mm from the cutting tool, and can clamp and pull out the work forward.

When the cutting tool is below the upper surface of the front vice jaw in the front vice device while the first detection means is ON, the front vice device can approach the cutting tool under the following conditions.

(A) When the end face of the front vise jaw is separated from the cutting tool by a slight distance (A + B), for example, 80 mm, the front vice device can move back and forth with the third detection means in the OFF state, and the front vise jaw can be moved. Enables tightening, loosening and activation of cutting tools and cutting down.

(B) When the end face of the front vice jaw is between the distance (A + B) and the distance A from the cutting tool, for example, 80 mm and 1 mm
When the distance is between 0 mm, the third detection means is in the ON state,
The front vice jaw only when clamping the work
It can penetrate within the distance (A + B).

(C) When the end face of the front vice jaw is within the distance A of, for example, 10 mm from the cutting tool, the second detection means is in the ON state, the front vice cannot be retracted, and is stopped. In this state, the front vice jaw cannot be loosened,
The starting of the cutting tool and the lowering of the housing cannot be performed, and the cutting cannot be performed. However, advancement of the front vise is possible.

Thus, the positioning of the cutting of the wide thin plate work whose work is lower than the height of the front vise jaw can be performed more easily than before.

According to the second aspect of the present invention, when the third detecting means is turned on, the indicator light flashes, and when the second detecting means is turned on, the indicator light is turned on to notify the worker. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a horizontal band saw machine as an example of a cutting machine according to the present invention.

FIG. 2 is an enlarged view as viewed from an arrow II in FIG.

FIG. 3 is an enlarged view as viewed from an arrow III in FIG. 1;

FIGS. 4A and 4B are explanatory diagrams of the operation of the present invention.

FIG. 5 is an explanatory diagram of a horizontal band saw machine as an example of a conventional cutting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal band sawing machine (cutting machine) 7 Saw blade housing (housing) 13 Band saw blade (cutting tool) 15 Fixed saw blade guide 17 Moving saw blade guide 23 Front vice device 27A Vice jaw before fixation 29A Vice jaw before movement 33 First detection Means 45 Second detecting means 47 Third detecting means 55 Indicator light

Claims (2)

[Claims] 1. A vertically movable housing having a cutting tool, a front vice device having a front vice jaw movable in a front-rear direction, and the housing descending from above and the cutting tool being located on the upper surface of the front vice jaw. First vise device for detecting that the front vise jaw moves from the front of the cutting tool, and the front vice jaw moves to a position slightly away from the position of the cutting tool by a distance A and (A + B). Second and third detecting means for detecting that the end face has reached,
A cutting machine characterized by comprising: 2. The cutting machine according to claim 1, further comprising an indicator light that is turned on or blinks when each of the second and third detection means is turned on.