JPS6078652A - Safety locking apparatus for impeller breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a safety lock for an impeller breaker whose casing is divided into an upper part and a lower part in a plane extending through the axis of a cutter rotor. A stop device of the type in which the upper part is connected to the lower part so as to be pivotable about an axis parallel to the axis of the cutter rotor, and in which the cutter rotor is supported in the upper part. Regarding.

Prior art impeller breakers are used to crush pulverizable materials that are fed in solids into granules obtained as deposits with a relatively narrow particle size distribution. The comminution takes place between the cutting edge of a stationary cutter and the cutting edge of a rotating cutter. In order to avoid the risk of accidents, such impeller breakers are equipped with a safety locking device to prevent the impeller breaker from opening and injuring one's hand inside the moving cutter. Each locking device must meet the following conditions:

It is to be avoided that the impeller breaker opens and the hand is thrust into a working component, such as a cutter or the drive member, resulting in injury and that the drive is connected when the impeller breaker opens. The impeller breaker must be opened only after the active components have stopped.

Cutoff switch locking device, double locking device.

Various devices are known, such as electrical and mechanical time delay devices and the like. These devices are used individually in conjunction with the type of drive and the speed of the cutter rotor; however, in order to meet all safety requirements, it is often necessary to combine the individual devices mentioned above. . However, this is technically front-loaded and expensive.

Furthermore, with such composites the risk of failure is relatively high and the possibility of any bridging is also relatively high.

OBJECTS OF THE INVENTION The object of the invention is to provide a safety locking device for an impeller breaker of the type mentioned at the outset, which is simple in construction and operation and which meets all safety requirements.

According to the invention, the cutter rotor is arranged to be directly driven by a drive motor fixed on a common base together with the lower part of the casing via a connecting member, and when the cutter rotor stops, the drive motor engages with the shaft of the drive motor, together with the coupling member half, until the coupling of both coupling member halves is completely released.
The solution is that it can be moved in the axial direction.

Example The invention will now be explained with reference to the illustrated embodiment.

The casing of the impeller breaker has a lower part 1, an upper part 2 and a side protection plate 3 fixed to this upper part on the end face side.
It consists of. In this way a grinding chamber is formed,
In this grinding chamber, a rotor 4 with a cutter is rotatably mounted and cooperates with a cutter 5 fixed on the upper part 2. Toward the bottom, the grinding chamber is bounded by a sieve 6. Rotor 4 with a cutter shaped like a milling cutter
has a spiral cutting edge 7 in this embodiment, and the cutting edge 7
are arranged in accordance with the herringene toothing. As a result, the objects to be crushed rotating in the grinding chamber are sent toward the center of the rotor with cutters, so that the end face side of the rotor with cutters is not subjected to any load from the objects to be crushed, and especially for thermoplastic coatings. When the crushed material is used, adhesion of the crushed material to the side protection plate 3 of the casing can be avoided. In this case, the carry-out strip 11 provided on the end face side of the cutter-equipped rotor 4 directs the material to be crushed between the cutter-equipped rotor 4 and the side protection plate 3 toward the circumferential surface of the cutter-equipped rotor 4. transport. The shaft 8 of the cutter rotor 4 is directly connected by a coupling member 9 to a drive motor 10 which is designed as a geared motor. The material to be ground is fed to the impeller breaker via a feed tube 12 and, after being ground and passed through the openings of the sheave 6, is pneumatically removed by a suction trough 13. The lower part 1 of the impeller breaker is fixed to a movable base plate 14. This board also supports the device for axially moving the drive motor 10 (see FIG. 3). The device has a support plate 15 on which a drive motor 10 is screwed and which is held movably by a pin 17 engaging in a slot 16. There is. The movement of the support plate 15 and thus of the drive motor is effected by means of a decoupling device 22, which in this embodiment is designed as a simple pivoting lever 19 which can be pivoted about the bin 18, which decouples the entraining bin 20 and the handle 9. 21.

In the operational readiness state of the impeller breaker (see FIG. 1), the contact lens ζ of the limit switch located in the motor current circuit engages positively in a recess provided in the edge of the support plate 15. There is.

Such an arrangement is used to interrupt the motor current circuit at the beginning of the traversing process and thus to immediately stop the drive motor; such an immediate stop requires additional measures in this embodiment. Enabled to represent. This is because the drive motor 10 is constructed as a geared motor with a relatively low output rotational speed. (The circumferential speed of the cutting edge 7 is Q, from 5 m/s to 2 m/s.) The moving distance in the axial direction is defined by the dimension of the elongated hole 16. In other words, the elongated holes are in both connecting member halves 9a.

9b are completely separated from each other in the uncoupled state (fourth
(see figure). As a result, the safety locking effect produced by the coupling element 9 is removed and the upper part 2 together with the cutter rotor 4 is pivoted upwards (see FIG. 5). In order to prevent contact with the rotating coupling member, two 7-P24, 25 are provided, of which 7-P24 is connected to the drive motor 10 and 7-P'25 is connected to the upper part 2. In the state in which the connecting members are connected, the edges of the hoods are overlapped by approximately the distance traveled in the axial direction of the drive motor 10 (see FIG. 1).

The described impeller breaker is constructed as a subordinate machine for an injection molding machine that processes plastics, and in this case the unnecessary parts and scraps produced during injection molding can be crushed directly in the injection molding machine, so that the resulting granules can be crushed. can be immediately fed back into the processing process.

Due to the configuration of the present invention, the impeller breaker is opened more often during operation. This is because the upper part of the casing, which can be pivoted open, is locked by means of a connecting member. Furthermore, in order to open the impeller breaker, the cutter rotor is forcibly separated completely from the drive. The handle prevents injury by inserting one's hand into the rotating cutter rotor and prevents the cutter rotor from being damaged by an electrical fault or by deliberate switch-bridging when the upper part of the casing is swiveled open. cannot be started.

Furthermore, when the upper part of the casing is turned open,
The cutter rotor can be finely positioned by hand for cutter adjustment by pivoting in the now exposed connecting member half. In this case, it is not necessary to insert your hand into the cutter for this purpose.

Furthermore, the arrangement according to the embodiment of claim 2 is used to prevent the coupling elements from becoming uncoupled under load. As the uncoupling device, any device suitable for this purpose is used, for example a simple pivot lever or a spindle drive which can be driven by a crank handle. In this case, the limit switch is arranged in such a way that it causes an immediate stop of the drive at the beginning of the travel process and allows reconnection only when the coupling member is fully coupled.

In the case of free-wheeling machines, it may be advantageous to provide an automatically acting brake which brings the machine to a standstill very quickly. However, such measures are not necessary if, in accordance with the embodiment of patent claim 3, a directly coupled geared motor is used for the drive, especially with a relatively low output speed. . This is because such motors automatically stop without virtually freewheeling if the motor current circuit is interrupted.

Furthermore, the embodiment according to claim 4 achieves that it is not possible to insert a hand between the halves of the connecting member even in the disconnected state of the connecting member.

wiom*iaq The drawings show an example of an impeller breaker configured as a mobile subordinate machine for an injection molding machine for processing plastics, and Fig. 2 is a cross-sectional view of the impeller breaker in the direction of the arrow in FIG. 1; FIG. 3 is a plan view of the movable base plate of the impeller breaker with a decoupling device for the drive motor; FIG. FIG. 5 is a view corresponding to FIG. 2 with the upper part of the casing swiveled open. , 1...lower part, 2... upper part,
3... Side protection plate, 4-... Rotor with cutter, 5-
...Cutter, 6...Sheep, 7...Blade tip, 8...
Shaft, 9... Connecting member, 9a, 9b... Connecting member half, 10... Drive motor, 11... Carrying out strip, 12...
...Charging tube, 13...Suction trough, 14...Substrate, 15...Support plate, ]6...Long hole, 17.18...
Bin, 19...Swivel Reno-120...Tracking pin,
21... Grip portion, 22... Connection release device, 23...
・Limit switch, 24.25 (1 other person)

Claims (1)

[Claims] 1. A safety locking device for an impeller breaker whose casing is divided into an upper part and a lower part in a plane extending through the axis of a cutter rotor, the upper part being divided into an upper part and a lower part. The cutter rotor (4) is connected to the lower part so as to be pivotable about an axis parallel to the axis of the cutter rotor, and the cutter rotor is supported in the upper part. is directly driven via a connecting member (9) by a drive motor (10) fixed together with the lower part (1) of the casing on a common base plate (14), so that the cutter rotor When stopped, the drive motor (10), with the coupling half (9a) engaging the shaft of the drive motor, moves in the axial direction until the two coupling halves (9a, 9b) are completely uncoupled. A safety locking device for an impeller breaker, characterized in that it is adapted to be moved by. 2. In order to move the drive motor (IO)e, a decoupling device (22) is used which forcibly cooperates with a limit switch (23) located in the motor current circuit. Safety locking device as described. 3. The safety locking device according to claim 1 or 2, wherein the drive motor (10) is a geared motor that immediately stops when the motor current circuit is interrupted. 4. Contact with the connecting member (9) is prevented by two 7-Ps (24, 25) whose edges overlap approximately the travel distance of the drive motor (10) in the connected state of the connecting member; One of the ten thousand hoods (24) is driven by a drive motor, and the other hood (25) is fixed to the upper part of the pivotable casing. Safety locking device as described.