WO2008113602A1

WO2008113602A1 - Paper shredder comprising a safety device in the insertion opening

Info

Publication number: WO2008113602A1
Application number: PCT/EP2008/002279
Authority: WO
Inventors: Hermann Schwelling
Original assignee: Hermann Schwelling
Priority date: 2007-03-22
Filing date: 2008-03-20
Publication date: 2008-09-25
Also published as: DE212008000024U1

Abstract

The invention relates to a paper shredder, in the housing of which an insertion opening is provided for supplying sheet-type material or the like to the cutting mechanism. The insertion opening, which is inwardly oriented towards the cutting mechanism, is provided on an edge region of an adjacent receiving surface provided on the housing, and a safety tilt plate or a safety cover is arranged, in an articulated manner, on at least one receiving surface/covering plate, for the insertion opening of the paper shredder. The safety tilt plate is actively connected to at least one switching unit for interrupting the electrical power supply of the paper shredder, preferably by temporary contact or non-contact.

Description

Shredder with a safety device at the intake opening

Technical area:

The present invention relates to a shredder, also called shredder for the shredding of sheet material, in particular a shredder with a safety device at the intake opening, through which the sheet material is fed to the cutting unit.

State of the art: shredders are office equipment. Shrinking and lowering the price level of these devices, which are increasingly being used in small offices and more and more in home offices, has also made shredders into households increasingly popular. In private households, however, there is the possibility that small children live there. Since the fingers of young children are very thin, they can be cut if the little children's fingers inadvertently fall into the shredder's feed opening. In the worst case, this can lead to the separation of the finger. For this reason, conventional shredders pose a risk potential in this regard.

Problem The object of the present invention is to provide a shredder with security device which overcomes the above-described deficiencies of the current state of the art.

Solution to the problem

In the shredder according to the invention, with a safety device at the intake opening with the features of claim 1, it is possible that in the case of unintentional supply of a human finger in the feed opening / paper feed opening of the shredder, the electrical power supply of the

Shredder is interrupted and can be prevented in this way a violation of the shredder. The subordinate claims 2 to 9 disclose preferred embodiments of the invention. For realization, according to the invention, the following technical concept and variants are provided:

At the feed opening of the document shredder, ie at the paper feed opening of the shredder, a safety tilting plate (safety cover), connected to a hinge connection, is arranged on at least one edge region of a depositing surface, for example a cover plate provided substantially in front of the transitional region from the depositing surface to the intake opening the above-mentioned safety tilt plate with at least one safety switch, which serves to interrupt the electrical power supply of the shredder, is operatively connected by means of contact. This safety tilt plate is located above the inlet opening of the feed opening of the shredder.

The above-mentioned safety tilt plate preferably forms a bulge at its bottom, wherein the above-mentioned, preferably pin-shaped bulge provided by the provided on the cover plate of the shredder passage opening with the push button of the inside of the shredder

Safety switch, which is preferably a micro-switch, communicates by means of contact. The above-mentioned safety switch according to a further embodiment is an induction switch in non-contact design and on the safety tilting plate, an induction body is provided, which is connected by contact with the above-mentioned safety switch.

At the above-mentioned, preferably pin-shaped bulge a repositioning spring is provided.

In the present invention, on the said cover plate, in its edge area directed toward the paper feed opening of the shredder, the safety tilting plate is unilaterally connected to a hinged connection, this safety tilting plate being arranged in a depression provided in said edge region of the cover plate such that the upper surface of the safety tilting plate essentially with the upper surface of the

Cover plate form a common, chamfered surface, which may be flat or curved. The other, free edge of the safety tilt plate is formed so that its upper surface adjoins the beginning of one of the fixed channel walls of the intake opening at a small distance.

Under normal circumstances, the pin-shaped recess of the bottom of the safety tilt plate will not press on the push-button of the safety switch and the safety switch will be in the open state. The electric power supply of the shredder is normal and the shredder is in normal operating condition.

It goes without saying that a repositioning spring or another object can be provided on the safety tilting plate. The spring force of the spring raises the safety platen until it is in a rest position so that the safety platen does not contact the safety switch in normal operating condition. Respectively, an object is provided on the safety tilting plate, so that the safety tilting plate can lift automatically.

If a human finger gets very close to the paper feed opening of the document shredder, then this finger is first on the

Hit safety tilting plate and the safety tilting plate is turned around its axis of articulation upon receipt of the pressure. This causes that after a limit value is exceeded, the protrusion presses on the push-button of the safety switch and a contact between the bulge and push-button of the safety switch is made. The safety switch is triggered in this way and immediately interrupts the electric power supply of the shredder. The operation of the shredder is discontinued. In this way it is prevented that the paper shredder located inside the shredder can injure the finger. Because inside the safety switch normally a spring or other object is provided for repositioning, learns the safety tilt plate after removal of the finger from the paper feed opening no more pressure and as a result also presses the safety tilt plate no longer on the push-button of the safety switch. The pushbutton of the safety switch is raised automatically and the electric power supply of the shredder is restored. The shredder thus resumes normal operation.

It is also possible according to a further embodiment variant that a plurality of safety switches are provided on a safety tilting plate. The above-mentioned safety switch can be configured in contact or non-contact type. It is only necessary that when pressure on the safety plate of the relevant safety switch is triggered and the objective of interrupting the electrical power supply of the shredder is ensured. In summary, the structural design of the present invention is simple.

The article according to the invention is safe and reliable. By interrupting the electrical power supply in too close pre-accession of a finger to the paper feed opening of the shredder corresponding injuries are avoided. The invention is explained below with reference to exemplary embodiments schematically illustrated in drawings and in details.

Show it:

Figure 1 is a plan view of the new document shredder;

Figure 2 is a side view of the shredder shown in Figure 1 along the section line A-A;

Figure 3 shows the detail B in Figure 2 in an enlarged partial view;

FIG. 4 is a sectional view according to FIG. 2 with an actuated safety tilting plate;

Figure 5 shows the detail C in Figure 4 in an enlarged partial view;

Figure 6 shows another embodiment of the shredder according to Figure 1;

Figure 7 shows the detail A in Figure 6 in an enlarged partial view; Figure 8 shows the embodiment of the shredder after

FIG. 6 with actuated safety device;

Figure 9 shows the detail D in Figure 8 in an enlarged partial view;

FIG. 10 shows a further embodiment variant of the new document shredder shown in FIG. 1 in a sectional view along section line A-A;

Figure 1 1, the detail E in Figure 10 in an enlarged

Partial view;

Figure 12, the further embodiment of the new

Shredder according to FIG. 10 with actuated safety device; and

Figure 13 shows the detail F in Figure 12 in an enlarged

Partial view.

In Figures 1 to 5, the new document shredder with a safety device at its intake opening in a first embodiment is shown. In the housing 10 of the document shredder "AV" the usual components such as drive unit, gear unit, control unit and the cutting unit are provided, which have not been further highlighted in FIGS. 1 to 13 of the present application. The same applies to operating and actuating elements, which pass through the housing 10 partly or are arranged on selbigem. The plan view of the new document shredder according to Figure 1 shows that on or in the surface of the housing 10 of the shredder "AV" a storage surface 2 is provided, which is sometimes called cover plate in the relevant professional circles. An edge area / section of the storage area 2 adjoins the upper opening of an intake opening 1. The intake opening 1, see Figure 3, is essentially formed by the spaced apart and generally parallel to each other arranged channel walls 1 a and 1 b. The area between these channel walls 1 a and 1 b has in the application described in the application a channel width 1 c, which is unchangeable. In general, the channel walls 1 a and 1 b are laterally interconnected by narrow walls, whereby a defined paper feed opening is formed. The outlet opening of the channel-like intake opening 1 is located above the cutting unit 1 1 of the shredder "AV"; This 1 1 is shown symbolically in Figure 2 with two dashed circles.

In the area adjacent to the intake opening 1 edge region of the storage area 2 a lowering 15 is provided according to the invention, whereby on the storage surface 2, a lowered portion 2a is formed. This reduction 15 is now in a new special design by a Safety tilting plate 3 filled, quasi again essentially closed. The safety tilting plate 3 is articulated along its one edge and there at least in sections to a connecting axis / hinge axis 9 movable. The free end of the safety tilting plate 3 ends substantially in alignment with the one channel wall 1 b of the intake opening. The safety tilting plate 3 is arranged above the inlet opening of the intake opening 1.

The above-mentioned safety tilting plate 3 is connected by contact with a switching unit, a safety switch 4, which is used for the interruption of the electrical power supply of the drive of the shredder.

Said safety tilting plate 3 forms at its bottom a preferably pin-shaped bulge 5, said bulge 5 being operatively in contact with a pushbutton 7 of the safety switch 4 provided within the shredder housing 10 through a passage opening 6 provided on the portion 2a of the cover plate 2. This safety switch 4 is connected to the control circuit of the document shredder "AV".

When the safety switch 4 is released / operated, the shredder's electrical power is interrupted and the shredder operation is stopped. At the above-mentioned bulge 5 is a repositioning unit, preferably a spring 8 is provided. Under normal circumstances, the spring force of the spring 8 raises the safety tilting plate 3, so that the pin-shaped bulge 5 does not press on the pushbutton 7 of the safety switch 4 and the safety switch 4 is therefore in the open state. The electrical power supply of the shredder is thus normal. It is of course that, without external pressure on the safety tilting plate 3, the grip of the safety tilting plate 3 is given solely by the spring 8 supported on the lowered portion 2a, so that the feeler switch 7 of the safety switch 4 is free and the safety switch 4 is in this way in open condition.

Now if a human finger - especially the fingers of a small child (the fingers of small children are particularly thin and can easily get into the paper feed opening 1 of the document shredder "AV") - should get to the intake opening 1 of the document shredder "AV", so this is Finger first meet the front of selbiger lying safety tilt plate 3 and the safety tilt plate 3 is pivoted after receiving a pressure with its free end about its hinge axis 9 down. This causes, when a predetermined limit value (a traveled distance or a rotation angle) is exceeded, that the pin-shaped bulge 5 presses on the pushbutton 7 of the safety switch 4 and a contact between bulge 5 and key switch 7 of the safety switch 4 is made. The safety switch 4 is triggered in this way and the safety switch 4 immediately interrupts the electrical power supply at least the drive of the shredder. The operation of the shredder is discontinued. In this way it is prevented that the shredding unit located inside the shredder can injure the finger.

Of course, the safety switch 4 may also be a non-contact type. For example, infrared induction switch, light induction switch, etc. can be used.

For example, according to a modification of the safety tilting plate 3, an induction body connected by contact with the safety switch 4 is provided. This induction body is the medium for reflecting the signals sent by the safety switch 4.

Under normal circumstances, the repositioning spring 8 provided on the safety tilting plate 3 or the other object provided on the safety tilting plate 3 has no contact with the safety switch 4. The safety switch 4 is thus in the open state and the document shredder can be operated regularly. If, as already mentioned, a human finger gets to the paper feed opening 1 of the shredder, this finger will first hit the safety tilting plate 3 and the safety tilting plate 3 will be rotated about its hinge axis 9 after receipt of the pressure.

When the safety tilting plate 3 is rotated to a predetermined angle, the safety switch 4 contacts the induction body of the safety tilting plate 3, and the signals sent from the safety switch 4 can be reflected by the induction body. The safety switch 4 receives the signals and is triggered and interrupts the electric power supply of the shredder. The operation of the shredder is discontinued. In this way, even with this modification of the invention prevents the located inside the shredder dangerous parts can injure the / the fingers.

Another embodiment of the invention is in the

Figures 6 to 9 shown. The intake opening 1 of the document shredder "AV" also consists of two channel walls 1 a and 1 b, whose

Channel width 1 c also has a predetermined, fixed amount. Through this access opening 1 to be shredded, leaf-shaped objects in the device "AV" down to the cutting unit 1 1 and then fed by selbigem 1 1. The adjacently arranged in front of the intake opening 1 shelf 2 also has here in the near the edge region arranged in a reduction 15 of the storage surface 2 safety tilting plate 3. This safety tilting plate 3 is also movably mounted on a hinge, a hinge axis 9. In this embodiment, provided on the underside of the safety cover 3 pin-shaped recess is shortened, so that a pin 5 'is formed. To this pin 5 ¹ , the spring 8 is also stored here, which is supported on the lowered portion 2a of the shelf / cover plate 2 and after actuation of the safety cover 3 selbigen in its rest position, see Figures 6 and 7, returns and holds there - in another Embodiment, the spring 8 is preferably mounted sideways of the shortened pin 5 ', see Figure 7 or 9. In this further embodiment, a switching sensor is provided on the lowered portion 2a of the storage area 2 in the region of the through-opening 6 already mentioned for the first embodiment, which electrically in the circuit of shredder "AV" is connected.

If the safety cover 3 (partly also called safety tilting plate) is lowered by actuation, the release is effected by the contact between the contact 5 arranged on the pin 5 'of the safety cover 3 and the sensor. The safety cover 3 dissolves through the

Contact the switch sensor for switching on and off and thus causes that in the circuit of the document shredder "AV", the power supply of the device / drive is turned off. Said switching sensor consists of a pair of copper guide plates, one of which 13 at the bottom of the safety cover 3, on Pin 5 ", and the other 12 on the surface of the tray 2a, as mentioned above The two copper guide plates 12 and 13 form the switch and are electrically connected in the circuit of the document shredder" AV " after execution partially or completely depressed - see Figures 8 and 9 -, the circuit is effected by the contact of the two conductive plates 12 and 13th

The following will briefly discuss the mode of operation of this exemplary embodiment.

Normally, the safety cover 3 is due to the spring 8 at a distance from the shelf surface 2a. The Kufper guide plates 12, 13 are separated from each other. In this case, the paper shredder "AV" operates, if a switch-on sensor or switch-on button was pressed. Before fingers can enter the intake opening 1, ie between the channel walls 1 a and 1 b of the intake opening, in particular fingers of children, the safety cover 3 is touched, which rotates due to pressure about its connection axis 9. If the safety cover 3 is actuated beyond a set limit value (a path or a rotation angle), the contact between the copper guide plates 12 and 13 occurs. This deactivates the power supply of the drive of the device and thus stops the operation of the device. This avoids the risk of injury. Of course, said switching sensor may be a contact switch. The triggering takes place by the contact between the push button 12 of the contact switch and the safety lid 3. If the safety cover 3 depressed, this activates the push button 12 with the result that at least the power supply to drive the paper shredder "AV" is stopped.

In another further application example of the invention, which is shown schematically in FIGS. 10 to 13, a safety cover is also located in front of the intake opening 1.

Safety tilting plate 3 'is provided, which is also mounted pivotably about a connecting axis 9 here. At the bottom of the hinge 3 ', a spring 8 is also provided here, which is supported on the lowered portion 2a of the shelf surface 2 and the safety lid 3' holds in its rest position. On the storage surface 2 is a switching sensor. The described switching sensor is electrically connected in the circuit of the document shredder "AV". As described above, the switching sensor can also be formed by a light barrier (transmitter and receiver); this is shown schematically in the figures 10, 11, 12 and 13 in the form of a

Circle 14. Transmitter and receiver are each side of the safety cover 3 '. Normally, the safety cover 3 ^{1 is} due to the spring 8 at a distance from the lowered portion 2 a of the storage surface 2, so that the light signal is uninterrupted. If the safety cover 3 'depressed, this is preferably covered with an existing on the same aperture 3a the light signal, so that the light signal is interrupted, whereby the document shredder "AV", ie its drive, is put out of operation. At that moment, a control signal for shutting down the device goes out of the light barrier, the document shredder "AV" stops the cutting process, if it is running. Of course, said switching sensor may also be another contactless sensor switch, for example an infrared sensor switch or an electromagnetic sensor switch, etc. The circuit is also arranged here by the change in position of above the input of the intake opening

Safety cover 3 '. If this is actuated, the signal reception of such sensors is thereby masked and the sensor generates a switching pulse.

Or, the safety cover 3 'or its diaphragm 3a reflects the signals of such contactless sensor switch, so that the sensor receives signals.

In these cases, the contactless sensor switch is set active or inactive respectively. Finally, the stop of the power supply of the drive of the document shredder "AV" is effected in order to avoid possible injury to the hands / fingers by the cutting unit 1 1.

Although the above-identified drawing features show several embodiments, but other embodiments within the meaning of the invention are possible; the described embodiments are not limiting. The skilled person can do many others Modifications and embodiments come within the scope and spirit of the inventive principles.

For example, the invention is also realized when the reduction 15 is formed in the storage area 2 in the region near the edge only channel-like. In this embodiment could then z. B. the upper portion, the input portion of the facing channel wall 1 b, stand bar-shaped next to the pivotable free end of the safety clamping plate 3. Thus, the upper body edge or surface of this web could also be curved or have a chamfer.

References directory

1 intake opening / paper feed opening 1 a, 1 b duct walls 1 c duct width

2 shelf / cover plate 2a lowered portion of Pos. 2

3, 3 'safety plate / safety cover

3a panel 4 safety switches

5 bulge (pin-shaped)

5 'shortened bulge (pin-shaped)

6 Through opening in Pos. 2a

7 key switch 8 spring / repositioning unit

9 connection axis / joint axis

10 housing

1 1 cutting unit

12.13 contact, switching sensor, copper plates 14 photocell

15 lowering

AV shredder

A detail in Figure 6

B Detail in Figure 2 C detail in Figure 4 D detail in Figure 8

E detail in Figure 10

F detail in Figure 12

Claims

Claims:

1. Shredder, in which in the housing (10) a

Feed opening (1) for feeding sheet-like or similar material to the cutting unit (1 1) is provided, wherein the body towards the cutting unit (11) directed towards the intake opening (1) at an edge region of the housing (10) provided adjacent storage area ( 2) is provided, characterized in that at the feed opening (1) of the shredder on at least one storage surface / cover plate (2) a safety tilting plate or a safety cover (3) is articulated, said safety tilting plate (3) with at least one

Switching unit (4; 12, 13; 14), which serves to interrupt the electrical power supply of the shredder (AV), is in Wirkverbinduπg; preferred by temporary contact or non-contact.

2. Document shredder according to claim 1, characterized in that the safety tilting plate (3) forms at its bottom a bulge (5), said bulge (5) through the on the cover plate (2) of the shredder (AV) provided through opening (6) passing through a momentary contact switch (7) of a switching unit provided within the shredder (AV), a safety switch (4); Preferably, the safety switch (4) is a microswitch.

3. Shredder according to claim 2, characterized in that the safety switch (4) is an induction switch in Nichtkontaktausführung and that on the safety tilting plate (3) an induction body is provided, which is temporarily operatively connected by contact with the safety switch (4).

4. Document shredder according to claim 1, 2 or 3, characterized in that on the safety tilting plate (3) a Repositioningiereinheit, preferably a spring (8) is arranged.

5. Shredder according to claim 4, characterized in that the spring (8) concentric with the bulge (5, 5 ') is arranged.

6. shredder according to claim 1 or 1 and 4, characterized in that the switching unit with the control of the circuit of the

Nuclear destructive operatively connected contact sensor unit, wherein one of the contact elements of the contact sensor unit on the safety tilting plate (3) is arranged.

7. Document shredder according to claim 6, characterized in that the contact elements of the switching contact sensor unit are a pair of copper guide plates, one of which (13) at the bottom of

Safety tilting plate (3) and the other copper guide plate (12) on the surface of the shelf (2, 2a) are arranged.

8. Shredder according to claim 1 or according to claim 1 or 4, characterized in that the switching unit is a switching sensor in the form of a light barrier, wherein the components transmitter and receiver of the light barrier on the support surface (2), substantially laterally from the pivotable safety tilting plate (3 ) are arranged.

9. Shredder according to at least one of claims 1 to 8, characterized in that the safety tilting plate (3) above the inlet opening of the feed opening (1) is arranged.