JPH07284577A - Cutter - Google Patents

Abstract

PURPOSE:To automatically suck, collect and remove chips simultaneously with cutting. CONSTITUTION:Concerning a cutter (an air nipper, for example,) 1, a chip sucking and removing means 4 is fitted adjacently to its cutting part 3A. This removing means 4 is provided with a suction head 30 equipped with a negative pressure generating means 31 opened on the side of the cutting part 3A for sucking the chips, chip discharge path 32 succeeding to the negative pressure generating part 31, and compressed air jetting nozzle part 33 opened in the middle of the chip discharge path 32. Then, the chips are sucked and removed by generating negative pressure at the negative pressure generating part 31 while using compressed air jetted out of the nozzle part 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cutting tools such as nippers, cutters, and pliers equipped with a chip removing means.

[0002]

2. Description of the Related Art Generally, a cutting tool such as a cutter or a nipper is used for cutting various articles such as a gate and a runner of a plastic molded product in a home electric appliance factory, a plastic factory or the like. Conventionally, as one of the cutting tools of this kind, there is known an air nipper in which a cutter is attached to a nipper body so that the cutter can be opened and closed, and an air cylinder device housed in the body drives the cutter to open and close (for example, Japanese Patent Application No. 93275). In this air nipper,
The cut chips are dropped into a recovery container provided below.

[0003]

By the way, since the chips cut by cutting tools such as the above-mentioned air nippers, manual nippers, and other cutters are scattered in all directions at the same time as cutting, a recovery container is provided. However, it is difficult to reliably collect all of them, and the current situation is that the workers collect them after the cutting work.

The present invention has been made in view of the above situation, and an object of the present invention is to provide a cutting tool capable of automatically collecting and removing chips without bothering an operator. is there.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention relates to a cutting tool including a cutting part for cutting an object to be cut, and suctioning and removing chips generated when the object is cut by the cutting part, in the cutting part or in the vicinity thereof. The feature is that a removing means is provided.

Further, in the cutting tool of the present invention, the chip suction / removal means has a negative pressure generating section which is open to the cutting section side and sucks chips, a chip discharge path following the negative pressure generating section, and compressed air supply. A suction head having a compressed air jetting nozzle portion opened in the middle of the chip discharge passage so as to generate a negative pressure in the negative pressure generating portion by jetting compressed air supplied from the passage. It has a feature.

Further, in the cutting tool of the present invention, the chip suction / removal means has a suction head having a chip suction port on the cutting portion side and a chip discharge port on the other side, and a hose or the like via the chip discharge port of the head. It is characterized in that it consists of a vacuum pump connected together. The cutting tool of the present invention is characterized in that the driving operation of the cutting tool and the operation of the chip suction / removal means can be simultaneously performed in an interlocked manner.

Further, the cutting tool of the present invention comprises a cutting tool body and a cutter case attached to the cutting tool body,
The suction head is attached to the cutting tool body or the cutter case. Further, the cutting tool of the present invention comprises a drive means for driving the cutting part by compressed air supplied from a compressed air supply path for driving the cutting tool,
It is characterized in that it is provided with one opening / closing valve for opening and closing the compressed air path for driving the cutting tool and the compressed air supply path of the chip suction and removal means.

[0009]

According to the present invention, since a negative pressure is generated in the negative pressure generating portion which is adjacent to the cutting portion and which follows the chip suction port of the chip suction removing means, a negative pressure is generated immediately before the start of cutting of the object to be cut. At the same time that chips are generated by driving the cutting part of the tool, the chips are sucked into the negative pressure generating part, and are reliably recovered in the recovery container via the chip discharge path. Therefore, the chips do not scatter, the sweeping work can be eliminated, and it is safe.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment in which the present invention is applied to an air nipper which is one of cutting tools. FIG. 1 is an overall schematic view of an air nipper 1, which includes a nipper body 2, a cutter 3 that is detachably attached to the nipper body 2, and a cutter 3.
A driving means 50 for cutting and driving the cutting tool, a chip suction removing means 4 for sucking and removing the chips generated when the object to be cut is cut by the cutter 3, and a chip collecting container 6 for collecting the chips sucked by the means 4. A suction hose 5 for guiding the chips sucked by the means 4 to the collection container 6, a compressed air source 7 for generating compressed air, and an air for supplying the compressed air from the compressed air source 7 to the nipper body 2. It is mainly composed of a supply pipe 8 and an air supply pipe 9 for supplying a part of the compressed air supplied by the air supply pipe 8 to the suction removing means 4 during the cutting operation of the cutter 3.

As shown in FIG. 2, the nipper body 2 has an air cylinder 10 substantially in the front half thereof. A piston 11 is fitted in the air cylinder 10 so as to be slidable back and forth. An air supply passage opening / closing valve 13 is fitted to the rear portion of the nipper body 2 via a partition wall 12, an air supply passage 14 is provided at the rear end of the nipper body 2, and the air supply pipe is connected to the air supply passage 14 via a joint 15. 8 is connected. A cutter case 16 is replaceably screwed to the front end opening of the air cylinder 10 of the main body 2, and the cutter 3 has a cutting part (blade) 3A in the case 16 at the tip of the case 16. It is mounted so that it can be opened and closed and can be opened and closed by a mounting screw 17.

A front portion 11A of the piston 11 has a reduced diameter and is fitted into the cutter case 16 so as to be movable back and forth, and an opening / closing cam surface 18 of the cutter 3 is provided and is retracted by a return coil spring 19. The open / close lever 3B of the cutter 3 is closed by the cam surface 18 by the forward movement of the piston 11 to automatically cut the object to be cut. Thus, these air cylinder 10, piston 11, opening / closing valve 13, compressed air source 7,
The air supply pipe 8 mainly constitutes the driving means 50.

The partition wall 12 is provided with an air supply port 20 and an exhaust port 21, the air supply port 20 being a ventilation port 23 provided in a cylindrical casing 22 of the on-off valve 13, and the exhaust port 21 being the on-off valve 13. Exhaust port 24 provided in the cylindrical casing 22 of
, They are in communication with each other. A valve body 25 is slidably fitted in the casing 22 of the on-off valve 13, and is constantly urged upward by a return spring 26.
The air supply passage 14 and the vent hole 23 are closed by the opening / closing valve 13, and the exhaust port 21 and the outside are communicated with each other.
In this state, the piston 11 is moved backward by the return coil spring 19, and both cutting blades 3A of the cutter 3 are opened.

The outer end portion 25A of the valve body 25 is moved in the direction shown by the arrow (a) in the figure by a valve opening / closing lever 28 whose one end is rotatably attached to the rear end portion of the main body 2 through a pin 27. When pushed, the valve body 25 slides inside the casing 22,
The air supply passage 14 and the vent hole 23 are communicated with each other,
The exhaust port 21 and the outside are closed. In this state, the compressed air from the compressed air source 7 is supplied into the air cylinder 10 through the air supply passage 14, the ventilation port 23 and the air supply port 20, and resists the biasing force of the return coil spring 19 to cause the piston 11 to move. To move the cutting blade 3 of the cutter 3 forward.
A is closed.

Further, the casing 22 of the opening / closing valve 13
As shown by the dotted line in FIG. 2, an air supply port 29 to the suction / removal means 4 is provided, and one end of the air supply pipe 9 is connected to the air supply port 29. By operating the lever 28, the driving compressed air supply passage (the air supply port 20 and the ventilation port 23) of the cutter 3 and the compressed air supply passage (the air supply port 29) of the chip suction removing means 4 are simultaneously interlocked. Can be opened and closed. That is, the operation of the cutter 3 and the operation of the chip suction / removal means 4 can be simultaneously performed by one operation by one on-off valve 13.

The chip suction / removal means 4 comprises a suction head 3
0, the suction hose 5, the chip collecting container 6, the compressed air supply source 7 which is shared with the driving means 50 of the cutter 3 of the air nipper 1.
It also comprises a compressed air supply pipe 8, a compressed air supply pipe 9, a drive means 50 for the cutter 3 of the air nipper 1 and an on-off valve 13 which is shared. As shown in FIG. 3, the suction head 30 has a negative pressure generating portion 31 which is open to the cutting portion 3A side of the cutter 3 and sucks chips, and a chip discharge passage 32 which communicates with the negative pressure generating portion 31. , A compressed air jet nozzle portion 33 opening in the middle of the chip discharge path 32, and is attached to the cutter case 16 together with the cutter 3 by a mounting screw 17. Further, the suction head 30 is configured such that when compressed air is ejected from the ejection nozzle portion 33 to the chip discharge passage 32, a negative pressure is generated in the negative pressure generation portion 31 by the so-called ejector principle.

The chip collecting container 6 is provided with a muffler 34 and an opening / closing lid 35. Operation of the valve opening / closing lever 28 of the opening / closing valve 13 and chip suction / removal means 4
It is preferable to set the negative pressure generation and the operation of the cutting portion 3A of the cutter 3 as shown in FIG. That is, the compressed air is ejected from the compressed air ejection nozzle 33 at the same time as the pressing operation of the valve opening / closing lever 28, and the negative pressure is generated in the negative pressure generating portion 31 of the suction head 30 prior to the operation of the cutting portion 3A of the cutter 3. Then, the ejection of the compressed air is stopped by opening the lever 28 a predetermined time after the completion of the operation of the cutting portion 3A,
Set so that the negative pressure is released. This setting is, for example, when the lever 28 is pushed and operated,
This can be achieved by designing the opening / closing valve 13 so that the air supply passage 14 and the air supply port 29 of the suction removing means 4 communicate with each other before the air supply port 20 of the air cylinder 10 communicates with the air supply port 20.

According to the first embodiment, the air nipper 1
By holding the cutter cutting portion 3A against the object to be cut and pushing the valve opening / closing lever 28,
3 is opened and the air supply passage 14 and the air supply port 2 of the suction removing means 4 are opened.
9, the compressed air is ejected from the nozzle 33 into the chip discharge passage 32 of the suction head 30, and a negative pressure is generated in the negative pressure generating portion 31 by the accompanying flow thereof, and immediately after that, the cutter 3 is cut. When the portion 3A is operated and the cutting of the object to be cut is completed, the chips thereof are sucked into the negative pressure generating portion 31 of the suction head 30 through the opening, and the compressed air ejected from the nozzle 33 causes the suction hose 5 from the chip discharge passage 32. Chip collection container 6 via
Will be recovered in. Then, by stopping the pushing operation of the valve opening / closing lever 28 after the completion of the cutting of the object to be cut, the opening / closing valve 13 is closed, the ejection of the compressed air from the nozzle 33 is stopped, and the negative pressure is eliminated.

In the above embodiment, the dedicated opening / closing valve 36 of the compressed air supply passage of the chip suction / removal means 4 is connected to the upstream side of the joint 15 as shown in FIG. (Not shown) is a valve opening / closing lever 2 of the opening / closing valve 13.
It can be configured to operate in conjunction with each other. If the opening / closing valve 13 for driving the cutter 3 and the opening / closing valve 36 for operating the removing means 4 are separately provided in this manner,
When setting the operation timing shown in, it is not necessary to change the design of the cutter driving on-off valve 13, and the lever 2
The lever 28 and the on-off valves 13 and 36 may be connected so that the on-off valve 36 for activating the removing means is opened first when the valve 8 is operated.

FIG. 6 shows the second embodiment of the present invention.
The difference from the embodiment is that the chip suction / removal means 4 has a chip suction port 37 in the cutting portion 3A and a chip discharge port 3 in the other.
8, a suction hose 40 having one end connected to the chip discharge port 38, a vacuum pump 41 connected to the other end of the suction hose 40, and chips connected to the vacuum pump 41. Since it is composed of a recovery container 42, a drive switch (not shown) of the pump 41 is simultaneously operated by the valve opening / closing lever 28, and the same effect as that of the first embodiment can be expected.

Since the air nipper body 2, the cutter 3 and the internal structure and operation thereof are the same as those of the first embodiment,
The common parts are given the same reference numerals, and detailed description thereof will be omitted. In each of the above embodiments, the suction heads 30 and 39 can be directly attached to the nipper body 2. The present invention is not limited to the above-described embodiment, and can be adopted not only in a manual cutting tool such as a manual nipper, but also in another cutter, a cutting tool such as pliers, and the design can be appropriately changed. is there.

[0022]

As described above, the present invention is characterized in that the chip suction / removal means is provided at or near the cutting portion, so that the structure is simple and the pressure is low, so it is safe, At the same time as cutting the object to be cut, chips can be sucked and collected automatically and reliably, and since chips do not scatter, safety and workability can be improved, and ready-made cutting tools can be used as is, so it is inexpensive Can be obtained.

Further, the present invention is characterized in that the driving operation of the cutting tool and the operation of the suction means can be simultaneously performed in an interlocked manner, so that the operation is simple and the operation is surely performed. It is possible to Further, the present invention is characterized in that the cutting tool driving compressed air passage and the compressed air supply passage of the suction means are opened and closed by a single on-off valve, so that the structure is simple and the operation is simple. Is easy and reliable, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway overall schematic view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway enlarged view of the cutting tool body of the embodiment.

FIG. 3 is an enlarged vertical sectional view of the suction head of the same embodiment.

FIG. 4 is an explanatory diagram of operation timing in the same embodiment.

FIG. 5 is a partially omitted side view showing another example of the interlocking operation of the opening / closing valves of the cutting tool driving compressed air supply path and the chip suction / removal means compressed air supply path in the embodiment.

FIG. 6 is a partially cutaway overall schematic view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Air nipper (cutting tool) 2 Nipper main body (cutting tool main body) 3A Cutter cutting part 4 Chip suction removal means 7 Compressed air supply source 8, 9 Compressed air supply pipe 13 Open / close valve 16 Cutter case 28 Valve open / close lever 30 Suction head 31 Negative pressure generation part 32 Chip discharge passage 33 Compressed air jet nozzle part 36 Open / close valve 37 Chip suction port 38 Chip discharge port 39 Suction head 40 Suction hose 41 Vacuum pump 50 Cutter driving means

Claims (6)

[Claims] 1. A cutting tool provided with a cutting unit for cutting an object to be cut, wherein the cutting unit sucks and removes chips generated when the object is cut by the cutting unit in or near the cutting unit. A cutting tool provided with means. 2. The chip suction / removal means is provided with a negative pressure generating section which is open to the cutting section side and sucks chips, a chip discharge path following the negative pressure generating section, and a compressed air supply path. 2. A suction head having a compressed air jetting nozzle portion opening in the middle of the chip discharge path so as to generate a negative pressure in the negative pressure generating portion by jetting air. Cutting tool. 3. A suction pump in which the chip suction / removal means has a chip suction port on the cutting portion side and a chip discharge port on the other side, and a vacuum pump connected to the chip discharge port of the head via a hose or the like. The cutting tool according to claim 1, wherein the cutting tool comprises: 4. The cutting tool according to claim 1, wherein the driving operation of the cutting tool and the operation of the chip suction / removal means can be simultaneously performed in an interlocked manner. 5. A cutting tool main body and a cutter case attached to the cutting tool main body, wherein the suction head is attached to the cutting tool main body or the cutter case. 2, 3 or 4 cutting tools. 6. A drive means for driving the cutting portion by compressed air supplied from a cutting tool driving compressed air supply path, and opening / closing of a compressed air supply path for the cutting tool driving compressed air path and the chip suction / removal means. The cutting tool according to claim 2, further comprising: