JPS58150446A - Finely cutting machine - 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 The present invention relates to the structure of a shredding machine that can efficiently shred paper and the like.

The shredding machine used to discard unnecessary documents uses a capacitor-type electric motor to rotate the slitter and shred it, and if it becomes overloaded and becomes clogged, it is manually reversed.

Removing the jammed paper by reversing the shredder in this manner is most convenient in this type of shredding machine, and is structurally convenient because it can be done by reversing the electric motor.

However, if the slitter is clogged with paper, the rotation is restricted and an overload current flows through the motor, so the operation must be immediately stopped and reversed. If the paper cannot be freed from the jammed state by this reversal, the operation must be stopped again. There must be.

If such operations are used by an unspecified person in an office or the like, operational errors may occur, and damage due to incorrect operation could not be avoided with instructions alone.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shredding machine for paper, etc., which can efficiently shred paper with simple operation.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. ``Figure 1 is a block diagram showing an embodiment of the shredding machine according to the present invention, and Figure 2 shows its operating state. FIG.

In FIG. 1, the shredding machine is provided with an electric motor 4 connected to a power source 1 via a control circuit or a voltage and current detector 3.

The electric motor 4 is connected to a slitter through a speed reducer 5, and the slitter 6 is constructed by rubbing the corners of two rotating blades together.

Paper 7 is inserted into the slitter 6 from above and is discharged as shredded waste paper 8 to the bottom.

The discharged waste paper 8 is configured to be stored in a box 9 provided below.

In Figure 2, the operating states of the shredder are A: stopped, B: idling, C: shredding, D: overloaded, and E: reversed.

Further, current states lO corresponding to A to E are shown.

Furthermore, such an operating state is mainly caused by the control circuit 2.
The control circuit 2 includes elements that operate by comparing a signal such as a reference voltage with a signal from the electric tlL detector 3, and reverses the electric motor 4 by using these elements. The element and reversal are equipped with a timer element or the like that automatically returns after a certain period of time.

With such a configuration), when the shredding machine is operated,
When the paper 7 is inserted into the slitter 6 from above, the paper 7 is caught in the slitter 6 and shredded, and is discharged downward as waste paper 8.

In the shredding state C in which the paper 7 is shredded in this manner, the rotational speeds of the slitter 6 and the electric motor 4 are lower than in the idling state BE, and on the contrary, the current state lO is increased.

Further, if the paper 7 gets jammed during shredding or the paper 7 is inserted in an overload state, the rotational speed of the electric motor 4 rapidly decreases and the current state 10 rapidly increases.

In this way, when the current state 18110 increases, that is, when a large current flows, the current detector 3 gives a signal to the control circuit 2, and the motor 4 is reversed for a certain period of time based on the relationship with the internal reference voltage element.

When the slitter 6 is reversed, the paper 7 stuck in the slitter 6 flows backwards and can be easily taken out.

The paper 7 is removed from the slitter 6 through this reverse flow.
Since the current detector 3I detects overload conditions such as when the motor is clogged, excessive current is prevented from flowing to the motor 4, and the reduction gear 5 is
This prevents damage to the torque transmission mechanism such as the above, allowing for safe use.

Moreover, since the reverse rotation is performed in response to an overload current, when an overload state occurs, the reverse rotation occurs in a short period of time to cause the jammed paper 7 to flow backward, so that efficient processing can be achieved.

That is, as soon as the paper 7 becomes clogged, it will flow backwards, making it easy to remove the paper 7 that has become clogged.

When the jammed paper 7 is taken out, it is reinserted and shredded so as not to cause an overload condition, such as dividing the paper into two halves.

In addition, in such an operating state, the current detector 3 or the control circuit 2 should be checked to prevent malfunction due to the starting current of the motor 4.
The control circuit 2 for the electric motor 4 can be easily manufactured by using a general control circuit that controls the torque of the electric motor.

In this way, in addition to detecting and controlling the operating chopsticks from the current state, equivalent control can also be performed from the rotating state, so a rotation speed detector is provided in place of the current detector 3 to detect the operating state. It can also be controlled.

In these controls, since a DC motor is used as the motor 4, the operating state can be easily and reliably detected due to its characteristics, which is effective.

The electric motor 4 can be maintenance-free because a DC motor such as a brushless motor that does not require maintenance for a long period of time can be used.

As explained above, the present invention uses a DC motor and controls according to the operating state using a control circuit, making it possible to efficiently operate shredding machines that often become clogged and become inoperable. It is an engineering university.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the shredding machine according to the present invention, and FIG. 2 is a block diagram showing its operating state. 2... Control circuit, 3... Current detector, 4... Electric motor, 6... Slitter. Figure 2-249-

Claims (1)

[Claims] The slitter is configured to rotate by decelerating the DC motor.
A shredding machine characterized in that the DC motor is configured to be switchable between forward and reverse directions, and a control circuit is configured to detect the operating state from the DC motor and reverse the operation for a certain period of time.