JPH077743U - Chip crusher - Google Patents

Abstract

(57) [Summary] [Purpose] Supply cutting chips to the cutter smoothly and evenly.
The cutting efficiency should be improved and the foreign matter mixed in the chips should be easily discharged. [Structure] A cutter frame 1 is arranged below a hopper 12, and a single cutter shaft 4 is supported in the frame 1 so as to be capable of forward and reverse rotation. A plurality of cutters 5 are mounted on the shaft 4, and a fixed blade 7 is provided on the inner surface of the cutter frame 1. A plurality of cutter grooves 9 are formed on the inner surface of the fixed blade 7, and the blade edges of the cutter 5 are arranged in the grooves 9 so as to be engageable. A guide plate 8 is provided above the fixed blade 7, and the upper end portion of the plate 8 is arranged in the hopper 12. A plurality of guide grooves 10 are formed on the inner surface of the guide plate 8 in the vertical direction, and the cutting edge of the cutter 5 is placed in the grooves 10 so that the guide edges can be engaged. A chute 11 is provided in the cutter frame 1, and the lower end of the chute 11 is arranged apart from the cutting edge of the cutter 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chip crusher that supplies cutting chips to a cutter smoothly and evenly to improve cutting efficiency, and at the same time, allows foreign substances mixed in chips to be easily discharged.

[0002]

[Prior art]

 Conventionally, various chip crushers have been proposed for cutting chips discharged from machine tools. For example, in Japanese Patent Application Laid-Open No. 58-205550, a cutter shaft is provided in a casing immediately below a hopper, a plurality of cutters are fixed to the shaft, and a comb-teeth-shaped fixed blade is arranged so as to face the cutters. The cutting action is divided by the shearing action of the blade at the upper end and the cutter.

However, in this conventional device, since the width of the hopper in the direction orthogonal to the cutter shaft is relatively narrow, long chips are often caught on the opening edge of the hopper, and the chips are accumulated on this. Supply to the cutter is interrupted and the cutting efficiency is reduced, but when the above chips break, these chips are temporarily supplied to the cutter, causing the motor to become overloaded. .

[0004]

[Problems to be solved by the device]

 The present invention solves such a problem, supplies cutting chips to the cutter smoothly and evenly, improves the cutting efficiency, and provides a chip crusher that can easily discharge foreign substances mixed in cutting chips. Is intended.

[0005]

[Means for Solving the Problems]

 Therefore, in the chip crusher of the present invention, a cutter frame is arranged below the hopper, and a single cutter shaft is supported in the frame so that it can be rotated in the forward and reverse directions. In a chip crusher in which a fixed blade is provided on the inner surface of the blade, a plurality of cutter grooves are formed on the inner surface of the fixed blade, and the blade tips of the cutters can be inserted into the grooves, a guide plate is installed above the fixed blade. The upper end of the plate is placed in the hopper, a plurality of guide grooves are formed vertically on the inner surface of the plate, and the blade of the cutter is placed in the groove so that the cutter frame can be engaged. A chute is provided inside the chute, and the lower end of the chute is spaced apart from the cutting edge of the cutter to supply cutting chips smoothly and evenly to the cutter to improve the cutting efficiency. It has the feature that it has a discharge of foreign matters mixed in the swarf in easily so.

[0006]

[Work]

 The guide plate is placed in the hopper, and the cutting chips put in the hopper are guided to the cutter side. A guide plate is formed with a plurality of guide grooves in the vertical direction, and chips are inserted into the grooves to regulate the movement of the chips and guide the chips smoothly to the cutter side. And encourage smooth division. A chute is provided in the cutter frame to receive the chips that have been put into the hopper. By making the cutter frame wider by the amount of the chute, long chips are caught on the upper edge or inner surface of the hopper, forming a so-called bridge shape, and subsequent chips accumulate on this, and supply to the cutter. It prevents the situation where the cutting is interrupted and the cutting by the cutter can be done efficiently. By disposing the lower end of the chute away from the cutting edge of the cutter and moving the foreign matter mixed in the cutting chips into the gap and dropping it, the foreign matter can be easily discharged.

[0007]

【Example】

 Hereinafter, a description will be given of an illustrated embodiment in which the present invention is applied to a type in which it is hung at the carry-out end of a chip conveyor. In FIGS. 1 to 3, 1 is a rectangular frame having a pair of vertical frames 2 and horizontal frames 3 assembled together. The cutter shaft 4 is supported by the cutter frame so as to be able to rotate in the forward and reverse directions, slightly closer to the horizontal frame 3 between the vertical frames 2 and 2.

A plurality of large cutters 5 and small cutters 6 of different sizes are alternately spline-fitted and mounted on the cutter shaft 4, and these blades are formed to have the same blade thickness. On the inner surface of one of the horizontal frames 3, a comb-tooth-shaped fixed blade 7 and a guide plate 8 are arranged vertically in close contact with each other, and the fixed blade 7 is arranged below the horizontal frame 3.

The fixed blade 7 is composed of a plate body having substantially the same length as the horizontal frame 3, its upper end is positioned at the center of the horizontal frame 3 in the height direction, and the cutting edge of the small cutter 6 is close to the inner surface of the upper end. It is arranged. Further, a plurality of cutter grooves 9 are vertically formed at positions on the inner surface of the fixed blade 7 facing the large cutter 5, and the blade edges of the large cutter 5 are inserted into the grooves 9.

The guide plate 8 is formed of a plate body having the same thickness as the fixed blade 7 and substantially the same length as the horizontal frame 3. The upper end of the guide plate 8 projects above the cutter frame 1 and is arranged inside a hopper described later. The cutting edge of the small cutter 6 is arranged close to the inner surface of the lower end portion thereof. A plurality of guide grooves 10 are formed in the vertical direction on the inner surface of the guide plate 8, the guide grooves 10 are formed in the same phase as the cutter groove 9, and the groove width and the groove bottom are formed in the same manner as the cutter groove 9. The cutting edge of the cutter 5 is engaged in the groove 10.

On the inner surface of the other horizontal frame 3, a chute 11 is provided over the entire area in the longitudinal direction, the chute 11 is formed to be inclined downward, and the lower end thereof is the same as the cutter shaft 4. It is arranged at a high position and away from the rotation range of the cutter 5.

A funnel-shaped hopper 12 is provided directly above the cutter frame 1, and a side wall 12 a thereof is attached to the outer surface of the guide plate 8.

A motor bracket 13 is fixed to the outer surface of the other lateral frame 3, and a motor 15 integrated with the speed reducer 14 is attached to the inner surface of the end portion of the bracket 13.

In the figure, reference numeral 16 denotes a coupling arranged between the cutter frame 1 and the speed reducer 14, which connects the cutter shaft 4 and the output shaft 17 of the speed reducer 14. Reference numerals 18 and 19 denote suspension arms whose upper ends are arranged outside the hopper 12. The lower ends are fixed to the lower surfaces of the horizontal frames 3 and 3, and a pair of mounting holes 20 are formed at their upper ends. For example, it is attached to the side wall of the carry-out end of the chip conveyor 21 attached to a machine tool (not shown) such as a lathe.

The chip crusher configured as described above is suspended by attaching the upper ends of the suspension arms 18 and 19 to the side wall of the carry-out end of the chip conveyor 21. At this time, the motor bracket 13 side is arranged inside the chip conveyor 21, and the guide plate 8 is attached to the outside of the chip conveyor 21, that is, the working space side.

In this case, since the side wall 12a of the hopper 12 is formed vertically to prevent the side wall 12a from projecting to the work space side, the installation space is more compact than that formed in a funnel shape, Therefore, the work space can be effectively used.

In the chip crusher thus installed, the motor 15 is turned on before and after the driving of the machine tool, the power of which is transmitted from the coupling 16 to the cutter shaft 4 through the reduction gear 14, and the shaft 4 is moved to the position shown in FIG. 3, the large cutter 5 and the small cutter 6 rotate synchronously.

When the cutting chips are carried out from the chip conveyor 21 under such a condition, they fall in the hopper 12 and directly onto the large cutter 5 and the small cutter 6, and a part of the cutting chips. The powder slides down the inner wall of the hopper 12 and is captured by the lower end of the chute 11, and a part of the cutting powder further drops along the inner surface of the guide plate 8 onto the cutters 5, 6 at the lower end thereof.

In this case, since the facing distance between the lateral frames 3 and 3 of the cutter frame 1 is relatively wide due to the increase of the space above the chute 11, relatively long chips are fed to the hopper 12. Even if it falls, it is hooked on the upper edge or the inner surface of the hopper 12 to form a so-called bridge shape, and subsequent chips are accumulated on this, and there is no concern that the supply to the cutters 5 and 6 will be interrupted. . Therefore, the cutting by the cutters 5 and 6 described later can be performed efficiently.

After that, these chips are hooked on the large cutter 5 and the small cutter 6 and moved to the guide plate 8 side, and these are each inner surface of the guide plate 8 and the fixed blade 7 and the cutting edge of the small cutter 6. And between the guide groove 10 and the cutter groove 9 and the blade edge of the cutter 6, and are crushed and sheared into pieces, which fall and are housed in a chip box (not shown). It

In this case, the chips that have moved to the guide plate 8 side are engaged in the guide groove 10 and the movement thereof is restricted, that is, the chips move along the groove 10 and therefore slide toward the cutters 5 and 6 side. And the posture is restrained even at the time of cutting, so that the cutting can be done smoothly and efficiently.

On the other hand, when the chips are divided and foreign matter such as the workpiece or the residual material is mixed in the chips, the overload state occurs when the chips are caught, and this is detected by the overload detector (not shown). Upon detection, the driving of the motor 15 is stopped. After the stop, the motor 15 is driven in the reverse direction to send the foreign matter to the chute 11 side, drop it from between the cutters 5, 6 and the chute 11 and discharge it to the outside of the device. The same is true when a large amount of chips are thrown into the hopper 12 at one time. In this case, the chips are sent back to the chute 11, and the cutters 5, 6 are used to drive the motor 15 in the normal direction. The fixed amount is moved to the guide plate 8 side.

[0023]

[Effect of device]

 As described above, the chip crusher of the present invention is provided with the guide plate above the fixed blade, the upper end portion of the plate is disposed in the hopper, and the plurality of guide grooves are vertically formed on the inner surface of the plate. By arranging the cutting edge of the cutter in the groove so that it can be inserted, the cutting chips can be inserted into the guide groove and their movement can be regulated, so that the cutting chips can be smoothly guided to the cutter side, and at the time of cutting, the posture Can be restrained to promote smooth division. Further, in the present invention, since the chute is provided in the cutter frame, the chips thrown into the hopper are received and prevented from falling off, and the cutter frame is widened by the shoot. Therefore, it is possible to prevent the long chips from catching on the upper edge or inner surface of the hopper, forming a so-called bridge shape, and depositing subsequent chips on this, interrupting the supply to the cutter. The cutting with the cutter can be performed efficiently. Further, since the lower end of the chute is arranged apart from the cutting edge of the cutter, there is a practical effect that foreign matter mixed in the cutting chips can be sent to the gap side and easily discharged from the gap.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, a part of which is a sectional view.

FIG. 2 is a plan view of FIG.

3 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Cutter Frame 4 Cutter Shaft 5 Cutter 7 Fixed Blade 8 Guide Plate 9 Cutter Groove 10 Guide Groove 11 Chute 12 Hopper

Claims (1)

[Scope of utility model registration request] 1. A cutter frame is disposed below a hopper, a single cutter shaft is supported in the frame so as to be reversible, and a plurality of cutters are mounted on the shaft.
A fixed blade is provided on the inner surface of the cutter frame, a plurality of cutter grooves are formed on the inner surface of the fixed blade, and in a chip crusher in which the cutting edge of the cutter can be inserted into the groove,
A guide plate is provided above the fixed blade, the upper end of the plate is arranged in the hopper, and a plurality of guide grooves are vertically formed on the inner surface of the plate, and the blade edge of the cutter can be engaged in the groove. A chip crusher characterized in that a chute is provided in the cutter frame and the lower end of the chute is spaced apart from the cutting edge of the cutter.