JPH0435114Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is formed by providing a constant gap between the upper blade and the lower blade, so that the edge of the sealed letter to be opened is attached to the upper blade. To provide a cutter equipped with a sealed letter opening mechanism capable of easily and easily positioning the amount to be cut at an unsealed part just by abutting it, and by cutting the unsealed part by a cutting operation of an upper blade.

[Problems to be solved by conventional techniques and ideas] Conventionally, a cutter has a lower blade that is fixed along one side of the base plate and an upper blade that is pivotally connected at the tip of the lower blade and is movably installed. Generally, the lower and upper blades are assembled so that their sides are in close contact with each other. Therefore, the amount and position of the object to be cut are determined by the dimension lines of the squares provided on the top surface of the base plate.

However, when opening an envelope, if the opening part of the envelope is filled with documents, in order to open the envelope without damaging the envelope, it is necessary to cut the opening part by about 1 mm to 1.5 mm. Not necessarily,
In this way, when trying to cut the edge to a small width, if the envelope is positioned even slightly diagonally, about half of the edge will be cut, leaving an uncut portion, and it will be difficult to open the envelope. In some cases, the edges to be cut are not necessarily perpendicular to the edges in the length direction of the envelope, and in such cases, if you try to cut at around 1 mm to 1.5 mm, the amount to be cut may increase or In some cases, uncut portions may be left uncut, and it becomes even more difficult to cut these uncut portions by repeating the operation, resulting in the documents inside the envelope being cut together. There were drawbacks such as

As a solution to this problem, a utility model registration number filed by the same applicant as the present application is proposed.
There is a device in No. 1754786, but this device has a tip 3a of the lower blade 2a as shown in FIGS. 5 and 6.
is bent 9a in the direction opposite to the base plate 1a, and a protrusion 17 that protrudes downward with a curve 16 is integrally formed and installed on the base end side, and when the upper blade 4a is lowered, the protrusion 17 Guided by the curve 16 of the upper blade 4a, the base end side of the upper blade 4a is positioned outside the protrusion 17, and the upper blade 4a is moved by the tip of the bend 9a of the tip 3a of the lower blade 2a and the protrusion 17. By keeping a constant distance and parallel to the lower blade 2a,
Although a certain distance 14a is provided between the upper blade 4a and the lower blade 2a, in the invention of this earlier application, the protrusion 17 forms a step 20 at the end of the curve 16.
A stopper 8a is provided from this stepped portion 20.
Curve 16
When the step 20 at the end of the step 20 becomes shallow and a desired distance 14a is to be obtained between the upper blade 4a and the lower blade 2a, the upper blade 4a is quickly and accurately engaged with the step 20. Moreover, the upper blade 4a gets stuck at the curve 16, and the stepped portion 20
Although it is trivial, in order to lock the upper blade 4a,
This required concentration of consciousness, and even if such concentration of nerves was trivial, it made using the cutter a nuisance.

The operation to obtain the desired distance between the upper blade 4a and the lower blade 2a must be done unconsciously and naturally, and if it is not positioned quickly and accurately, the opening mechanism may be damaged. The value of the installed cutter will be lost. However, the cutter with utility model registration No. 1754786 is
In the operation to obtain a desired distance between the upper blade 4a and the lower blade 2a, there are drawbacks such as an unconscious and natural operation and an inability to obtain a quick operation.

The present invention has been made in view of the above points, and is formed by making the tip of the lower blade protrude outward from the base plate, and bending the tip at a predetermined angle in the direction opposite to the base plate. The upper blade is elastically pivoted at the tip of the lower blade, and the base end of the upper blade is formed to extend and protrude outward from the base plate, and the trochanter is pivoted on the side surface of the base plate. This trochanter is partially protruded to the side of the lower blade, and with the upper blade in contact with the contact point of the trochanter, the curvature of the tip of the lower blade and the trochanter cause the upper and lower blades to separate. To provide a cutter equipped with an envelope opening mechanism configured with a certain distance in between, and to set the amount to be cut at the opening point simply by abutting the edge of the envelope to be opened against the upper blade. It is an unconscious and extremely natural operation that allows for quick and easy positioning, and the cutting operation of the upper blade makes it possible to cut the opening part in the range of 1 mm to 1.5 mm. be.

[Means for Solving the Problems] An example of the implementation of the present invention will be explained below with reference to the drawings. 1 is a base plate, 2 is a lower blade fixedly installed along one side of the base plate, and 3 is a base plate. 1, the tip of the lower blade 2 protrudes outward; 4, the tip 3 of the lower blade 2; and 4, the upper blade pivoted by a pivot 5; A coil spring is elastically pivoted to the blade 2, 7 is a handle connected to the upper blade 4, and 8 is a stopper for regulating the lowering position of the upper blade 4.

In the present invention, the tip 3 of the lower blade 2 is formed with a predetermined curvature 9 in the direction opposite to the base plate 1, and the base end 10 of the upper blade 4 is bent outward of the base plate 1. A trochanter 12 is pivotally installed on the side surface 11 on the proximal side of the base plate 1, and the trochanter 12 partially protrudes laterally of the lower blade 2, and the upper blade 4 In a state in which the upper blade 4 is in contact with the contact point 13 of the trochanter 12, the upper blade 4 is parallel to the lower blade 2 due to the curvature 9 of the tip 3 of the lower blade 2 and the contact point 13 of the trochanter 12. It is constructed by providing a certain distance 14 between the lower blades 2.

The stopper 8 is located below the trochanter 12 and is fixedly installed at a position such that the upper edge 14 of the upper blade 4 protrudes above the upper edge of the lower blade 2, that is, the upper surface of the base plate 1. The base end 10 of the upper blade 4 is located at the trochanter 1.
2 and the upper edge 15 of the upper blade 4.
protrudes above the lower blade 2 and is restricted to a position where the lower blade 2 is at a different level.

[Function] Since the present invention has the above configuration, the lower blade 2
The contact point 13 of the trochanter 12 and the tip of the curvature 9 provided in the tip portion 3 of the blade is at a predetermined distance from the lower blade 2, e.g.
By setting the upper blade 4 parallel to the lower blade 2 with an interval of 1 mm or 15 mm, the upper blade 4 is in contact with the contact point 13 of the trochanter 12.
Due to the curvature 9 of the tip 3 and the contact point 13 of the trochanter 12, a certain distance 14 is provided between the upper blade 4 and the lower blade 2 parallel to the lower blade 2. and,
Since the trochanter 12 is rotatably installed,
When the upper blade 4 is lowered, the rotation of the trochanter 12 smoothly and reliably guides the upper blade 4 to the contact point 13 of the trochanter 12, and a predetermined gap is formed between the lower blade 2 and the upper blade 4. Between
14 can be accurately secured by an unconscious and extremely natural operation and also by a quick operation.

Therefore, when opening a sealed letter, the upper blade 4 is lowered so that the base end 10 of the upper blade 4 touches the contact point 13 of the trochanter 12.
In the state where it is engaged with and positioned parallel to the lower blade 2,
When the sealed letter 18 is placed on the base plate 1 and the edge 19 to be opened is moved to the upper blade 4, the edge 19 hits the upper edge 15 of the upper blade 4, and the sealed letter 18 is opened and cut. Positioning can be easily and easily set, and the edge 19 on the opening side of the sealed letter 18 protrudes to the outside of the lower blade 2 by a distance corresponding to the distance 14, and the upper blade 4 is then used for normal cutting operations. Therefore, the edge 19 on the opening side of the envelope 18 has a gap of 1
Only the part that protrudes into 4 is cut off, making envelope 1.
8 can be opened without damaging the documents inside.

In addition, since the upper blade 4 is pivoted elastically to the lower blade 2, when cutting down without being hindered by the warp 9 of the tip 3 of the lower blade 2, the blade part of the upper blade 4 is securely connected to the lower blade. It can engage with the blade portion of No. 2 to perform a cutting action.

[Effects of the invention] Therefore, the present invention secures a certain distance between the lower blade and the upper blade by using the curvature provided at the tip of the lower blade and the contact point of the trochanter, and furthermore, the trochanter By the rotation of It maintains accurate settings during operation, and when opening an envelope, the dimensions and positioning of the opening point are made easy, simple, and accurate. 1mm to 1.5
It has the advantage of being able to easily and reliably cut even millimeter-sized cuts.

[Brief explanation of the drawing]

The figures relate to the present invention; Fig. 1 is a perspective view, Fig. 2 is a plan view showing the upper blade positioned parallel to the lower blade;
Figure 3 is a side view showing the upper blade positioned parallel to the lower blade, excluding the handle, and Figure 4 is an enlarged plan view showing the main parts of the upper blade positioned parallel to the lower blade. , FIG. 5 is a plan view of the main parts of a conventional cutter, and FIG. 6 is a side view of the main parts. 1... Base plate, 2... Lower blade, 3... Tip, 4...
...Top blade, 9...Curvature, 10...Proximal end, 11...
Side, 12...trochanter, 13...contact, 14...between.

Claims (1)

[Scope of utility model registration request] The lower blade, which is fixedly installed along one side of the base plate, has a tip that protrudes outward from the base plate and is curved at a predetermined angle in the direction opposite to the base plate, and the upper blade is attached to the lower blade. In a cutter that is pivoted elastically at the tip and has the proximal end of the upper blade extended and protruded outward from the base plate, a trochanter is pivotally attached to the side surface of the proximal side of the base plate, and the trochanter is The lower blade partially protrudes laterally, and with the upper blade in contact with the contact point of the trochanter, the upper blade is parallel to the lower blade, with a certain distance between the upper blade and the lower blade. A cutter equipped with a mechanism for opening sealed letters.