JPH0445677Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an envelope opening device called a so-called letter opener, which opens sealed envelopes.

(Prior Art) Various envelope opening devices have been proposed in the past, and they are either tabletop type or handy handheld type. When the edge of the envelope to be opened is inserted into the cutting opening formed on the front of the device, the edge of the envelope is cut automatically while moving the envelope or by hand-held movement of the envelope or the device itself. It has become something to do.

(Problem to be solved by the invention) In the conventionally proposed envelope opening devices mentioned above, in order to prevent letters and other items stored inside from being cut and damaged, the opening part of the envelope is opened by cutting the opening part of the envelope at its edge. It is set to cut at small intervals from

However, since the cutting width is set to be small from the edge, envelopes having perforations for opening and cutting, which are being frequently used these days, may not be able to be opened. In other words, in this type of envelope, the edge portion outward from the perforation is usually glued in an overlapping manner, so even if the envelope is opened with a small cutting width, only the glued portion is cut. This is because the inside is not opened.

In addition, with conventional envelope opening devices, the opening edge portion to be cut and removed has an extremely small cutting width, which means that it can get caught up in the cutter and become tangled, making continuous use difficult. It was sometimes difficult.

Therefore, this invention was devised in view of the existing circumstances as described above, and it is possible to adjust the opening cutting width of envelopes in various ways to accommodate various types of envelopes, and also to To provide an envelope opening device which can surely discharge and remove an envelope without getting the opening edge part entangled with a cutter and is easy to handle.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in this invention, a pair of upper and lower discs arranged at the cutting opening 22 are driven by the driving force of the drive motor 12 built into the case body 1. In this envelope opening device, the cutters 25 are rotated in opposite directions to cut and open a predetermined envelope L that is inserted and moved between the cutters 25. It is characterized by being able to slide forward and backward in the depth direction of the cutting opening 22.

Furthermore, a restriction guide piece 28 may be disposed in front of the cutter 25 in the cutting direction to close the upper and lower surfaces of the cutting opening 22 and guide the unsealed cut edge portion after cutting.

The cutter 25 is disposed at a cutting opening 22 formed at the front of a cutter mechanism 20 housed in the case body 1 so as to be slidable back and forth.
The cutter mechanism 20 itself is slid back and forth on the case body 1 via the guide means 8, 22, 31, 32, and the cutting opening 22 located at the guide opening 7 on the front part of the case body 1 is moved toward the front part. The formed cutter frame 21 and the reduction gear means 13 supported on the cutter frame 21 itself and immovably fixed in the case body 1 so as to reduce the driving force of the drive motor 12 are slidable. A pair of upper and lower cutter shafts 23 and 24 that are connected in a possible state and are driven to rotate.
and the cutter 25 fixed to the front ends of the cutter shafts 23 and 24, respectively.

Further, the guide means brings the upper and lower edges inside the cutter frame 22 into contact with the upper and lower edges at both ends of the movable guide plate 8 disposed inside the cutter frame 22 at the front part of the cutter frame 21. The outer edge surface of the guide protrusion 31 formed on the side surface of the drive motor 12, which is fitted into the mounting opening opened in the rear wall, can be configured to come into contact with the inner edge surface of the guide recess 32 formed at the edge of the mounting opening. .

(Function) In the envelope opening device according to this invention, the cutter mechanism 20 is moved forward and backward along the front and back of the case body 1 in accordance with the opening and cutting width of a predetermined envelope L. The distance between the cutter 25 whose position is adjusted by sliding at 22 and the movable guide plate 8 which does not move on the back surface of the cutting opening 22 is set.

When the unsealed edge of the envelope L is inserted into the cutting opening 22 while making contact with the movement guide plate 8 and following this, the driving force of the driven drive motor 12 causes a pair of upper and lower disc-shaped envelopes to be inserted. The cutters 25 are rotated in opposite directions, and the opening and cutting operation of the envelope L is started using the cutting edges of the cutters 25.

At the same time as the envelope L is opened and cut, as the envelope L is moved forward along the moving guide plate 8, the cutter 25 cuts the opening edge portion of the envelope L at a predetermined cutting width.

The removed unsealed part between the cutter 25 and the back of the cutting opening 22 is guided as it is along the regulation guide piece 28 in front of the cutter 25, and is not caught in the cutter 25 or tangled. It is discharged to the outside of the case body 1 without any problem.

The cutter mechanism 20 slides forward and backward with respect to the case body 1 while maintaining the drive connection with the driven drive motor 12, and when the cutting width is small, it is used in the retracted position in the stored state, and When the cutting width is large, it is used in the forward position of the protruding state.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

<Summary> Reference numeral 1 shown in the figure is a case body,
This case body 1 has disk-shaped cutters 25 on the top and bottom for opening a predetermined envelope L, and a cutter mechanism 20 that slides back and forth so as to protrude from the case body 1 at the front part of the case body 1. , and a drive mechanism 10 for rotationally driving the cutter 25 of the cutter mechanism 20.

The driving force of the drive mechanism 10 is decelerated to rotate the upper and lower cutters 25 in opposite directions to cut and open the envelope L inserted between the cutters 25 whose cutting edges are in close contact with each other. .

Further, the cutter mechanism 20 is configured to be able to slide back and forth in the case body 1 while maintaining the driving connection state with the drive mechanism 10, and is in a state where the opening cut edge portion of the envelope L to be cut and removed is positioned. By sliding the cutter 25 portion in the depth direction of the cutting opening 22, the cutting width from the cutting edge is set.

<Case body> The case body 1 includes a pair of upper and lower case frames 2,
3 are connected to each other to form an internal cavity with a guide port 7 opened at the front, and a drive mechanism 10 and a cutter mechanism 2 are installed in the internal cavity.
0 are stored.

The rear part of the case body 1 is formed into a battery box 4 in which a predetermined dry battery B is housed, and is opened and closed by attaching and detaching a box lid 5 (see FIG. 4).

The case body 1 itself is formed in a size that can be grasped with hands and fingers, and has an operation protrusion 29 (described later) located in a slide operation opening 6 formed in the upper wall of the upper case frame 2. The cutter mechanism 20 itself can be slid back and forth by the pressing and sliding operation (see FIG. 1).

Further, the front part of the case body 1 is formed with a guide opening 7 which is hollowed out in a U-shape when viewed from the side. A cutting opening 22 of the cutter mechanism 20, which will be described later, faces the guide opening 7, and the cut edge of the envelope L to be opened is brought into contact with the inner part of the guiding opening 7, so that the envelope L can be opened. A movement guide plate 8 for guiding movement is fixed within the case body 1 itself by being fitted, for example, between the upper and lower case frames 2 and 3. In addition, this movement guide plate 8
has vertical protrusions formed on its front surface in the left-right direction, and is designed to facilitate the movement of the envelope L.

<Drive mechanism> Drive mechanism 10 housed in case body 1
is a drive motor 12 fixed to a motor pedestal 11 fixed in the case body 1, and this drive motor 1.
2 (see Fig. 2), this reduction gear means 13
The cutter mechanism 20 is configured such that the pair of upper and lower cutter shafts 23 and 24 are driven to rotate in opposite directions by being decelerated by the cutter mechanism 20.

This drive mechanism 10 is fixedly arranged within the case body 1 without sliding.

However, in consideration of practical ease of assembly, a reduction gear means 13 is incorporated together with cutter shafts 23 and 24 in a cutter machine frame 21, which will be described later.
The drive motor 12, which is fixed in advance within the case body 1, is connected to the drive motor 12 via the drive motor 1. Therefore, with respect to the reduction gear means 13 which is incorporated together with the cutter shafts 23 and 24 in the cutter machine frame 21, the driving gear in this reduction gear means 13 is the drive motor 1 which is installed in the cutter machine frame 21.
The two drive shaft pinions are inserted in a sliding manner so that they mesh with each other. At this time, the drive motor 12 itself is fitted into the mounting opening formed in the rear wall of the cutter frame 21.
is attached to the cutter machine frame 21, and both 12, 21
are integrated.

<Outline of cutter mechanism> On the other hand, the cutter mechanism 20 includes guide means 8, 2
2, 31, 32, the cutter frame 21 is slid back and forth on the case body 1, and has a cutter frame 21 formed in the front part with a cutting opening 22 located at the guide opening 7 in the front part of the case body 1, and this cutter machine supported by the frame 21 itself,
The reduction gear means 13 consists of a pair of upper and lower cutter shafts 23 and 24 that are slidably connected and driven to rotate, and a pair of upper and lower disc-shaped cutters 25 that are fixed to the front ends of the cutter shafts 23 and 24. It is configured.

<Cutter machine frame> The cutter machine frame 21 itself is formed in a substantially box-like shape with an internal cavity, and has a cutting opening 22 formed along the left and right direction in the front part.
When the cutter frame 21 is viewed from the side, the cutter frame 21 is formed to have a U-shaped depth, and the depth is adjusted from the front surface to correspond to the opening cutting width of the envelope L. The height corresponds to the maximum width of the slide interval, and the height thereof is sufficient to move the envelope L (see FIG. 4).

Further, the cutter machine frame 21 includes the above-mentioned reduction gear means 13 built therein. Specifically, the guide port 7 in the case body 1
The movable guide plate 8, which is immovably disposed on the back surface of the cutting hole 22, is arranged so as to be slidable in the depth direction of the cut hole 22. By incorporating and arranging the reduction gear means 13, it becomes built into the cutter machine frame 21. By fitting both ends of the moving guide plate 8 between the upper and lower case frames 2 and 3, the cutter frame 2 can be slid into the case body 1.
1, fixed arrangement of the reduction gear means 13, etc. can be easily performed.

<Cutter shaft> Inside the cutter frame 21, a pair of upper and lower cutter shafts 23 and 24 are supported, which are positioned along the front and rear sides of the cutter frame 21. As shown in FIG. They are supported on each other. The cutter shafts 23 and 24 are driven to rotate by being decelerated by the driving force from the drive motor 12 by the reduction gear means 13, and the case body 1
For the drive mechanism 10, which is immovably fixed to
The case body 1 is slid back and forth together with the cutter frame 21. Therefore, this cutter shaft 23, 2
In its cross section, at least a part of the outer circumferential surface of the gear 4 is a flat surface, and it is possible to rotate integrally with each gear in the reduction gear means 13, and also to be able to slide in the axial direction with respect to these gears. .

Further, the cutters 25 fixed to the front ends of the cutter shafts 23 and 24 are positioned facing the upper and lower sides of the cutting opening 22 in the cutter machine frame 21, and their peripheral edges overlap each other, further improving reliability and ease of cutting. In order to improve the performance, the outer periphery is formed into a slightly uneven wave shape, and
They are bent to interlock with each other at approximately 0.2mm.

Further, a coil-shaped pressure spring 2 is attached to one of the cutter shafts 23 and 24 so that the outer peripheral edges of the upper and lower cutters 25 are in close contact with each other.
6 is installed. Further, the cutter shafts 23 and 24 to which the cutter 25 is fixed are positioned and fixed within the cutting opening 22 by a presser shaft pin 27 from the front thereof (see FIG. 4).

In addition, in front of the cutter 25 along the traveling direction of the envelope L at the cutting opening 22, a regulating guide piece 28 is arranged to close the upper and lower openings of the inner edge of the cutting opening 22, so that the envelope L after being cut, In particular, the unsealed edge portion is discharged as is from the cutting opening 22 along the upper and lower inner surfaces of the regulating guide piece 28 (see FIG. 3).

<Sliding guide means for the cutter frame> The slides at the front and rear of the cutter frame 21 are
This can be done smoothly via a guide means, and the guide means for this purpose is, for example, as shown in the figure, at both ends of the movable guide plate 8 disposed inside the cutting opening 22 at the front of the cutter frame 21. On the upper and lower edges,
The upper and lower edges inside the cutting opening 22 are brought into contact with each other to provide sliding guidance in the front part of the cutter frame 21.
On the other hand, the outer edge surface of the guide protrusion 31 formed on the side surface of the drive motor 12, which is fitted into the mounting opening opened in the rear wall of the cutter machine frame 21, comes into contact with the inner edge surface of the guide recess 32 formed on the rim of the mounting opening. Then, slide guidance at the rear of the cutter machine frame 21 is planned.

At the same time, the cutter shafts 23 and 24 themselves
Sliding within the shaft hole of each gear in the reduction gear means 13 also facilitates sliding guidance of the entire cutter mechanism 20.

<Sliding operation of the cutter mechanism> The sliding operation of the cutter mechanism 20 itself in the front-rear direction of the case body 1 is performed by moving the operation protrusion 28 formed protrudingly on the upper wall of the cutter machine frame 21 to the top of the upper case frame 2 of the case body 1. The cutter mechanism 20 is placed in an outgoing position in a slide operation opening 6 formed in the wall, and the cutter mechanism 20 itself can be slid back and forth by pressing and sliding the operation protrusion 29 (Figs. 1 and 5). reference).

<Slide Stopper> Furthermore, a slide stopper 35 is provided to stop the cutter mechanism 20 at predetermined intervals when the cutter mechanism 20 itself is slid.

As shown in FIG. 4, this slide stopper 35 includes, for example, a stopper 36 made of a spring plate having an engaging end that is approximately V-shaped in cross section at the distal end that is biased toward an upward elastic tendency. 21 is fixed to the upper wall, and a plurality of engagement grooves 37 having a substantially V-shaped cross section are formed in a row on the back surface of the upper case frame 2 so that the engagement ends can be freely engaged with each other. be.

Therefore, when the cutter frame 21 is slid by the pressing slide of the operation protrusion 29, the stoppers 36 are fitted into the engagement grooves 37 one after another, and by engaging with one of them, the cutter frame 21 is slid. The slide of the cutter mechanism 20 can be temporarily stopped, and the cutting adjustment position of the cutter mechanism 20 moved forward and backward with respect to the case body 1 is maintained.

<Driving and Stopping the Drive Mechanism> On the other hand, the drive mechanism 10 is driven by moving the drive mechanism 10 into the cutting port 22 so that it is swung by the pressing action of the envelope L inserted into the cutting port 22 through the guide port 7. The switch lever 16 is supported so as to be able to swing freely against the repulsive force of the spring 17.
The switch contact 1 of the drive motor 12 circuit is attached to the switch shaft 18 which integrally rotates at the support part of the drive motor 6.
9 (see FIGS. 1 to 3).

Therefore, when the envelope L is inserted into the cutting opening 22, the switch lever 16 swings, which also swings the switch shaft 18, so that the switch contact 19 causes the drive motor 12 circuit to swing. It is closed and the drive motor 12 is driven. When the envelope L is removed from the cutting opening 22, the switch lever 16 is returned to its original position by the elastic force of the spring 17, and the drive motor 12 circuit is opened to prepare for the next operation.

A switch shaft 18 integral with the switch lever 16 is supported within the cutter frame 21 between the front and rear walls of the cutter frame 21 in the same manner as the cutter shafts 23 and 24, and is used to open and cut the envelope L. It goes without saying that the cutter frame 21 is used to slide the cutter 25 along with the cutter 25, which is slid back and forth to adjust the width.

<Example of Use> When using this device configured as in the above-mentioned embodiment, the operating protrusion 2 is inserted from outside the case body 1 in accordance with the opening cutting width of the envelope L.
9 is pressed and slid to move the cutter mechanism 20 forward and backward along the front and back of the case body 1, and set the interval between the sliding cutter 25 and the movable guide plate 8 on the back surface of the cutting opening 22.

At this time, use a regular envelope L that requires a small cutting width.
In this case, the cutter mechanism 20 is used in a retracted position with respect to the case body 1, and
In the case of an envelope L whose cutting width is to be increased, the cutter mechanism 20 is used in an advanced position in which it protrudes from the case body 1.

Next, when the unsealed edge portion of the envelope L is inserted into the cutting opening 22 of the cutter mechanism 20 through the guide opening 7 of the case body 1 and the switch lever 16 is swung,
The drive motor 12 circuit is closed and the drive motor 12
is driven. The drive motor 12 rotates a pair of upper and lower disc-shaped cutters 25 in opposite directions, and the opening and cutting operation of the envelope L is started using the cutting edges of the cutters 25 .

The envelope L or this devised device itself may be moved so that the envelope L is moved forward along the moving guide plate 8 at the same time as the opening and cutting. The paper is opened and cut with a predetermined cutting width.

The unsealed cut part to be cut and removed is cutter 25.
The envelope L is guided to be ejected out of the case body 1 by the regulation guide piece 28 in the front, and the envelope L is opened.

Further, when not in use, the cutter mechanism 20 may be retreated into the case body 1 and stored within the case body 1.

(Effects of the invention) This invention is constructed as described above, and because of this, the opening and cutting width of the envelope L can be adjusted in various ways, so that it is possible to adjust the opening and cutting width of the envelope L in various ways. These can be opened in accordance with the envelopes L, and the unsealed edges after cutting are smoothly removed from the case body 1 by the regulation guide piece 28 in front of the cutter 25. It can be cut and removed reliably without getting tangled.

That is, this is because this invention allows the cutter 25 to slide forward and backward in the depth direction of the cutting opening 22 while maintaining the drive connection state with the drive motor 12 built into the case body 1. The cutter 25 for opening and cutting the envelope L is slid forward and backward along the depth direction of the cutting opening 22 against the immovably fixed movable guide plate 8 at the back of the cutting opening 22 where the opening edge of the envelope L comes into contact. This is because the distance between both 8 and 25 can be adjusted by position adjustment accompanying the operation.

Moreover, since the cutter 25 is provided with a regulating guide piece 28 in front of the cutter 25 in the cutting direction for closing the opening portions of the upper and lower edge surfaces of the cutting port 22, the unsealed cut edge after cutting is disposed on the regulating guide piece 28 surface. By guiding and running the parts along, it is possible to smoothly guide and discharge the parts outside the case body 1 as they are. Therefore, unlike in the conventional case, the unsealing cut edge portion after cutting does not get entangled with the cutter 25, making it difficult to carry out the subsequent cutting and unsealing work, making it possible to proceed with the unsealing and cutting work continuously.

Further, the cutter 25 that slides back and forth is incorporated into a cutter mechanism 20 that is slidably disposed inside the case body 1, and is opened and cut in a predetermined manner by sliding the cutter mechanism 20 itself. You can adjust the width,
Since the sliding operation of the cutter mechanism 20 itself is extremely simple, its adjustment is simple and reliable. That is, the cutter 25 is slidable within the cutter frame 21 that is slid within the case body 1, and the reduction gear means 13 is supported on the cutter frame 21 itself and is immovably fixed within the case body 1. This is because the cutter shafts 23 and 24 are fixed to the pair of upper and lower cutter shafts 23 and 24, which are linked and rotated in a controlled manner, and when the cutter frame 21 is slid, the cutter 25 is also linked and slid at the same time. It is.

In addition, the drive mechanism 10 including the drive motor 12, which is a drive part, and the reduction gear means 13 for decelerating its driving force are fixed immovably within the case body 1, and Since only the cutter mechanism 20 is allowed to slide, the structure can be simplified, greatly contributing to downsizing the entire device, and facilitating a portable and compact design.

The slide guide of the cutter mechanism 20 itself is arranged on the upper and lower edges of both ends of the movable guide plate 8, which is disposed inside the cutting hole 22 at the front of the cutter frame 21.
While touching the upper and lower edges inside 2, cutter frame 2
The outer edge surface of the guide protrusion 31 formed on the side surface of the drive motor 12, which is fitted into the mounting opening opened in the rear wall of the cutter 1, is brought into contact with the inner edge surface of the guide recess 32 formed on the edge of the mounting opening. The front and rear parts of the machine frame 21 are slid while being securely supported, and the sliding is smooth and reliable.

Further, since the envelope opening device according to this invention is configured to be portable and handy, it is easy to handle, and since it is structurally simple, it can be provided at a low cost, and has excellent practical effects.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a perspective view of the state in use, Figure 2 is a schematic perspective view of the main parts of the drive mechanism and cutter mechanism, Figure 3 is a longitudinal cross-sectional view of the cutter portion, Figure 4 is a longitudinal cross-sectional view of the entire cutter, and Figure 5 is a schematic perspective view of the main parts of the drive mechanism and cutter mechanism. It is a top view of the whole with a part cut away. B...Battery, L...Envelope, 1...Case body,
2... Upper case frame, 3... Lower case frame, 4...
...Battery box, 5...Box lid, 6...Slide operation port, 7...Guidance port, 8...Movement guide plate,
10... Drive mechanism, 11... Motor pedestal, 12...
... Drive motor, 13 ... Reduction gear means, 16 ...
Switch lever, 17... Spring, 18...
Switch shaft, 19... Switch contact, 20... Cutter mechanism, 21... Cutter machine frame, 22... Cutting port, 23, 24... Cutter shaft, 25... Cutter, 26... Pressure contact spring, 27... Holder shaft pin, 28... Regulation guide piece, 29... Operation protrusion, 31... Guide protrusion, 32... Guide recess, 35
...Slide stopper, 36...Stopper, 37
...Engagement groove.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A pair of upper and lower disc-shaped cutters arranged at the cutting opening are rotated in opposite directions by the driving force of a drive motor built into the case body, and the cutters are inserted and moved between the cutters. An envelope opening device for cutting and opening a predetermined envelope, characterized in that the cutter can slide forward and backward in the depth direction of a cutting opening while maintaining a drive connection state with a drive motor. 2. The envelope opening device according to claim 1, further comprising a regulating guide piece disposed in front of the cutter in the cutting direction to close the upper and lower surfaces of the cutting opening and to guide the opening edge portion after cutting. 3. The cutter is disposed at a cutting opening formed at the front of a cutter mechanism that is housed inside the case so as to be slidable back and forth, and the cutter mechanism itself can be slid back and forth in the case via a guide means. , a cutter machine frame having a cutting opening located in the front part of the case body, and a cutter machine frame supported by the cutter machine frame itself;
In order to reduce the driving force of the drive motor, a reduction gear means fixed immovably within the case body is slidably connected to a pair of upper and lower cutter shafts that are driven to rotate, and to each of the front ends of the cutter shafts. 3. The envelope opening device according to claim 1, further comprising the cutter which is fixed. 4. The guide means is installed by opening in the rear wall of the cutter frame while bringing the upper and lower edges of the cutting hole into contact with the upper and lower edges at both ends of the movable guide plate disposed inside the cutting hole at the front of the cutter frame. 4. The envelope opening device according to claim 3, wherein the outer edge surface of the guide protrusion formed on the side surface of the drive motor to be fitted into the opening is brought into contact with the inner edge surface of the guide recess formed on the rim of the mounting opening.