JPH051313Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a shredding machine for shredding discarded documents, etc., and is particularly designed to improve the safety of the shredding machine.

[Conventional technology]

As this type of conventional technology, for example,
Techniques described in Japanese Patent Application Laid-open No. 56-41305 and Japanese Patent Application Laid-Open No. 53-113383 are known.

In these conventional techniques, the door provided at the front of the shredder's casing for taking out accumulated shredded waste was not equipped with a locking mechanism, so the door could be opened at all times.

Further, it is generally desired that the casing has a somewhat large volume so that the shredder can be operated continuously for a long period of time.

[The problem that the idea aims to solve]

However, if the casing door can always be opened as in the conventional technology described above, a small child can open the door and get into the casing when there are no adults near the shredding machine. Therefore, places where there are many children (e.g. elementary schools, etc.)
It was not suitable for installation in

Therefore, this invention was made by focusing on the shortcomings of the above-mentioned conventional technology, and the purpose of this invention is to provide a shredding machine with excellent safety by having a structure that prevents the door from being opened carelessly. There is.

[Means to solve the problem]

In order to achieve the above object, the shredding machine of this invention includes a casing having a door that can be opened and closed, a shredding device that discharges shredded waste into the casing, and an electric shredding device that drives the shredding device. A driving device, first and second locking mechanisms that individually lock the door, interposed between the driving device and a power source to intermittent power supply, and when the first locking mechanism is in an unlocked state. and an electromagnetic solenoid that is inserted between the disconnection means and the first locking mechanism and locks the second locking mechanism only when power supply to the drive device is stopped. It is characterized by being prepared.

[Effect]

In the shredding machine of this invention, power is supplied to the drive device and the shredding device is ready for operation only when the first locking mechanism is in the unlocked state.

Therefore, if the first locking mechanism is kept in the locked state, it will be impossible to open the door and the shredding device will not operate.

Furthermore, even if the first locking mechanism is in the unlocked state and the shredding device is in operation, if power is no longer supplied to the drive device due to a power outage, for example, the second locking mechanism
The lock mechanism becomes locked, making it impossible to open the door.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the drawings.

1 to 4 show an embodiment of the present invention.

First, the configuration will be explained. FIG. 1 is a perspective view showing the entire shredding machine 1, in which a door 2a that can be opened and closed by a hinge located on the right side of the front is provided on the front of a hollow rectangular casing 2. There is. Furthermore, inside the casing 2, there is a waste box (not shown) that can be taken out by opening the door 2a and only the top surface is open, for collecting the shredded waste discharged from the shredding device described later. ) are located.

An upper cover 4 is fixed above the casing 2, and a known shredding device 3 consisting of a document insertion section, a roll cutter, etc. is installed inside the upper cover 4. Shredded waste of the shredded document is discharged to the waste box.

Further, an electric drive device (not shown) consisting of an AC motor, a reduction gear, etc. is provided in the upper cover 4 at a position adjacent to the shredding device 3. A known configuration makes it possible to rotate the roll cutter of the shredding device 3 in forward and reverse directions or to stop it.

A lock plate 5 associated with the lock mechanism of the upper cover 4 is integrally provided on the upper surface of the door 2a, and a cross-sectional plan view thereof is shown in FIG.
A front sectional view is shown in FIG.

That is, in FIGS. 2 and 3, the upper cover 4
At the bottom of the casing 2, a horizontally long thin plate 4a integrally projects toward the inside of the casing 2, and this thin plate 4a
, a horizontally long long hole 4b and a substantially rectangular hole 4c are provided.
has opened. Further, a lock plate 5 parallel to the thin plate 4a is integrally provided on the upper part of the door 2a and protrudes toward the inside of the casing 2. A long hole 5a overlapping the long hole 4b and a hole 5b overlapping the hole 4c are provided. A first lock mechanism 6 and a second lock mechanism 7 are constructed on the upper surface of the thin plate 4a.

The first lock mechanism 6 has a hook 6a that rotates within a 90 degree range using only a key (not shown) inserted into a keyhole 8 provided on the front surface of the upper cover 4.
The door 2a is fixed to the upper cover 4 by passing through both the elongated holes 4b and 5a (the state shown in FIG. 3, 6a'), and the door 2a is locked. Note that the key is
The key can be pulled out from the keyhole 8 only when the first locking mechanism 6 is in the locked state.

On the other hand, the second lock mechanism 7 rotates the rotation shaft 7 in accordance with the sliding of the sliding body 9a of the electromagnetic solenoid 9 for AC.
The tip 7c of the lever 7a pivots around a,
The door 2a is fixed to the upper cover 4 by passing through both the holes 4c and 5b, and the door 2a is locked.This tip 7c rises when electric current is supplied to the electromagnetic solenoid 9. (unlocked state) and lowered (locked state) when not supplied. Note that 7d is a spring that biases the lever 7b in the downward direction.

Further, on the upper surface of the thin plate 4a and on the left side of the first lock mechanism 6, a switch 10 is provided as the disconnection means of the present invention, and this switch 10 has the following functions:
When the plate spring 10a is pressed by the locking portion 6b that rotates together with the hook 6a, it turns on (connected state), and when the pressure is released, it turns off (disconnected state). That is, the switch 10 is turned on when the first locking mechanism 6 is in the unlocked state, and turned off when the first locking mechanism 6 is in the locked state.

Further, the upper surface of the thin plate 4a is provided with a preventer 11 that prevents the hook 6a from lowering when the door 2a is opened, and the preventer 11 is rotatable about a pivot shaft 11a. The top cover 4 is always urged toward the front of the upper cover 4 by a spring 11b, and includes a protrusion 11c that prevents the hook 6a from pivoting, and a locking portion 11d that abuts against the lock plate 5. . In other words, hook 6a
When the door 2a is opened with the first locking mechanism 6 pivoting upward, that is, the first locking mechanism 6 is unlocked, the preventer 11 pivots due to the biasing force of the spring 11b, and the protrusion 11c engages with the hook 6a. Since it enters between the long hole 4b and the hook 6a, it becomes impossible to rotate the hook 6a, that is, to lock the first locking mechanism 6. Then, when the door 2a is closed, the lock plate 5 is moved to the locking portion 11.
By pressing d, the preventer 11 turns inside the upper cover 4, allowing the hook 6a to turn.

FIG. 4 shows an electrical circuit diagram of this embodiment.

A switch 10 as an on/off means and a motor 13 forming a part of a drive device are inserted in series between the terminals of the power source 12, and an electromagnetic solenoid 9 is connected in series with the switch 10 and in parallel with the motor 13. It is interposed. Note that 13a is a manual motor switch for switching the state of the motor 13 (stop, forward rotation, reverse rotation), and 14 is a breaker.

Next, the operation of the above embodiment will be explained.

If the door 2a is now closed and a key (not shown) is not inserted into the keyhole 8, the hook 6a will face downward (Fig. 3 6a') and pass through the long holes 4b and 4c. Therefore, the first lock mechanism 6
Since the door 2a is locked, the door 2a cannot be opened. Furthermore, since the locking part 6b that rotates together with the hook 6a does not press the leaf spring 10a of the switch 10, the switch 10 is in a disconnected state, so the motor 13, that is, the shredding device 3 cannot be driven. . Note that since power is not supplied to the electromagnetic solenoid 9, the lever 7b is lowered by the biasing force of the spring 7b, and the tip 7c passes through the holes 4c and 5b, so the second locking mechanism 7 is also locked. It has become a state.

In other words, by simply managing the locked state of the first locking mechanism 6, that is, only one key, it is possible to make it impossible to open the door 2a and to drive the shredding device 3. Even when an adult or the like is not present, it is possible to easily prevent the shredding device from being activated due to a child's mischief, or the child from entering the door 2a by opening it. Therefore, it is safe to install it in a place where there are many children (for example, an elementary school).

As shown in FIG. 4, in this electric circuit, the motor 13 will not be driven unless the switch 10 is connected. 6a is turned to place the first locking mechanism 6 in the unlocked state, and the locking part 6b is turned to press the leaf spring 10a to put the switch 10 in the connected state.

Then, the power supply 12 and the motor 13 are connected via the switch 10, so the motor switch 1
When 3a is operated, the motor 13 is driven and the shredding device 3 starts shredding.

In this state, the first locking mechanism 6 is in the unlocked state, and the electromagnetic solenoid 9 is supplied with electric power in the same way as the motor 13, so that the tip 7c of the lever 7b is in the hole 4c. and 5b, the second locking mechanism 7 is also in an unlocked state. Therefore, the door 2a can be opened and closed freely, and when a predetermined amount of shredding has been completed, the door 2a can be opened, the waste box inside the casing 2 taken out, and the shredded waste can be disposed of in the designated garbage collection area. good.

Note that when the door 2a is opened, the lock plate 5 integrated with the door 2a also moves to the outside of the casing 2, so as described above, the lock plate 5
The protrusion 1 of the preventer 11 that had been pushed in by the
1c is moved below the hook 6a by the biasing force of the spring 11b. Therefore, since the hook 6a is prevented from turning, the unlocked state of the first lock mechanism 6 and the connected state of the switch 10 are maintained, and the power supply to the electromagnetic solenoid 9 is continued, so that the second lock mechanism The unlocked state of 7 is also maintained. Also, since the hook 6a cannot be rotated,
The key inserted into the keyhole 8 cannot be pulled out.

Then, when the door 2a is closed, the lock plate 5
Since the protrusion 11c comes into contact with the locking part 11d of the preventer 11 and pushes the preventer 11, the protrusion 11c
Since the hook 6a moves from the bottom side of the hook 6a, it becomes possible to turn the hook 6a. Therefore, when the key is turned, the first lock mechanism 6 becomes locked, making it impossible to open the door 2a, and at the same time, the switch 10 is also cut off, so power supply to the motor 13 is stopped. The shredding device 3 will no longer operate.

On the other hand, even if the first locking mechanism 6 is in the unlocked state and the switch 10 is in the connected state, if power is no longer supplied to the motor 13 due to a power outage, for example, power is no longer supplied to the electromagnetic solenoid 9 at the same time. , the lever 7b descends and its tip 7
c passes through the holes 4c and 5b, and the second locking mechanism 7 becomes locked, making it impossible to open the door 2a.

In other words, if the power supply is stopped due to a power outage or the like, it is not known when the motor 13 will resume driving, so it is dangerous to open the door 2a and insert your hand carelessly. As described above, since the door 2a cannot be opened, an unexpected accident will not occur.

Specifically, this assumes the following usage situations.

That is, in recent years, shredding machines are often equipped with a device that automatically feeds discarded documents into the shredding device 3, and there is a possibility that a power outage etc. may occur while such a shredding machine is in use. , when the motor 7 and thus the shredding device 3 stops, the user may think that the device has stopped because all the discarded documents are gone. Therefore, the user tries to open the door 2a and take out the waste box in order to throw away the shredded waste, but when the power supply is resumed and the shredder 3 starts operating, there is a risk that his hand will get caught in the roll cutter. There is. However, in this embodiment, as described above, if the power supply to the motor 13 suddenly stops, the second locking mechanism 7 is activated and the door 2a is locked, so such a possibility is eliminated. There isn't.

[Effect of idea]

As explained above, the shredding machine of the present invention includes a casing having a door that can be opened and closed, a shredding device that discharges shredded waste into the casing, and an electric type that drives the shredding device. a driving device, first and second locking mechanisms that individually lock the door, interposed between the driving device and the power source to intermittent the supply of power, and when the first locking mechanism is in the unlocked state. an electromagnetic solenoid that is inserted between the disconnection means and the second lock mechanism and locks the second lock mechanism only when the power supply to the drive device is stopped; Since the first locking mechanism is in the locked state, that is, managing only one locking mechanism, it is possible to make it impossible to open the door and drive the shredding device, so that the device cannot be activated by a child's mischief. You can easily prevent children from entering the casing,
Further, if power is no longer supplied to the shredding device due to a power outage or the like, the second locking mechanism will prevent the door from opening, which has the effect of making it difficult to open the door due to an unexpected accident.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the configuration of an embodiment of the present invention, FIG. 2 is a partially cutaway plan sectional view of FIG. 1, and FIG.
The figure is a partially cutaway front sectional view of FIG. 1, and FIG. 4 is an electric circuit diagram of this embodiment. 1... Shredder, 2... Casing, 2a...
door, 3... shredding device, 6... first lock mechanism,
7...Second lock mechanism, 10...Switch (intermittent means), 12...Power supply, 13...Motor (drive device).

Claims (1)

[Scope of utility model registration request] A casing having a door that can be opened and closed, a shredding device that discharges shredded waste into the casing, an electric drive device that drives the shredding device, and first and second doors that individually lock the door. a locking mechanism;
an intermittent means interposed between the driving device and the power source to intermittent the supply of power and to be connected only when the first lock mechanism is in the unlocked state; and an intermittent means between the intermittent means and the second lock mechanism. An electromagnetic solenoid inserted therein locks the second locking mechanism only when power supply to the drive device is stopped.