JP3519887B2 - Tape trimming device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape trimming device for cutting a corner portion of a tape into a round shape or a straight line shape by a fixed blade member and a movable blade member.

[0002]

2. Description of the Related Art Conventionally, there is known a tape trimming device for cutting a corner of a tape into a round shape or a straight shape by a trimmer fixed blade member and a trimmer movable blade member (for example, Japanese Patent Publication No. 6-2191). See the bulletin).

In such a trimming device, since the movable blade member and the fixed blade member are rotatably connected by caulking pins, it is necessary to align the blades in the rotating direction of the movable blade member.

However, it is very difficult to secure high precision in the above-mentioned blade alignment,
Since the cutting tension between the fixed blade member and the movable blade member depends only on the delicate caulking strength, there is a problem in terms of mass productivity.

Further, if such a trimming device is applied to a small-sized device such as a tape writer, since the rotation angle of the movable blade member is large, it is necessary to enlarge the main body, which is disadvantageous in terms of space saving. there were.

The present invention has been made in view of the above points, and an object thereof is to provide a compact and mass-production tape trimming device.

The present invention provides a tape trimming device for cutting a corner of a tape into a round shape or a straight shape by a fixed blade member and a movable blade member, wherein the movable blade member is a leaf spring. And the blade portion of the movable blade member is attached so as to form a predetermined angle with respect to the blade portion of the fixed blade member, and the blade portion of the movable blade member is fixed at the tip side at the time of cutting. The shape of the blade member is such that the lapping amount with respect to the blade portion gradually increases.

Therefore, at the time of cutting, the blade portion of the movable blade member gradually increases the lap amount with respect to the blade portion of the fixed blade member toward the tip side, so that the blade portion of the movable blade member moves as the cutting progresses. Moves away from the fixed blade member,
The movable blade member and the fixed blade member are always cut at one point, and the cutting is performed with a small load.

Further, since a button member for pressing the movable blade member to perform cutting is provided, and the button member pushes the inside of the blade portion of the movable blade member, the fixed blade member and the movable blade member. The twisting force due to the wrap with the member also acts as a cutting tension.

Further, since the tip surfaces of the fixed blade member and the movable blade member are inclined at a constant angle, collision between the two blade members is eliminated and cutting is stabilized.

The movable blade member has a pair of left and right symmetrically formed blade portions, each blade portion cutting the left and right corner portions of the tape, and the left and right corner portions of the tape are cut at the same time. To be done.

The blade portion of the fixed blade member has slightly higher hardness than the blade portion of the movable blade member, and damage during engagement is prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are a plan view and a vertical sectional view of a tape trimming device, respectively. The tape trimming device 1 cuts the corner portion of the tape 4 into a round shape (or a straight line shape) with two blade members including a fixed blade portion 2 and a movable blade member 3.

On one side of the fixed blade member 2, the movable blade member 3 is connected and fixed, and the operation member 5 having a button portion 5a for pressing the movable blade member 3 is rotatable via a rotary shaft 6. It is pivotally supported. Further, the fixed blade member 5
A table member 7 having a tape guide groove portion 7a is attached to the other side via an insertion member 8.

The insertion member 8 has an insertion opening 8a which is continuous with the tape guide groove portion 7a, and when the end portion of the tape 4 is inserted into the insertion opening 8a and set, the corner portion of the tape 4 is predetermined. It is set to the position. A stopper portion 8b is provided in the insertion opening 8a for restricting entry of the tip portion of the tape 4.

The operating member 5 is connected to and supported by the fixed blade member 2 via a main body portion 5b having a button portion 5a, a lever portion 5c connected to the side of the main body portion 5b, and a rotary shaft 6. The supporting portion 5d is provided.

In this set state, by operating the operating member 5, the movable blade member 3 and the fixed blade member 2 are cut into square corners 4a, 4a as shown in FIG. The corners 4b and 4b have a round shape.

The fixed blade member 2 is, as shown in FIG.
An upper surface portion 2d, which is a connecting portion 2c to which the movable blade member 3 is connected and fixed, and an upper portion 2d, which is formed with an opening 2b, a portion of which is the blade portion 2a, and is bent downward from the front and rear edges of the upper surface portion 2d. Front and rear surface portions 2e and 2f, left and right surface portions 2g and 2h bent downward from the left and right side edge portions of the upper surface portion 2d, and mounting portions 2j and 2k extending laterally from the center of the lower edge of the left and right surface portions 2g and 2h. Have. The screws 11, 11 are applied to the mounting portions 2j, 2k.

On the other hand, the movable blade member 3 has a leaf spring shape,
As shown in detail in FIG. 5, it has a pair of left and right blade portions 3a, 3a that are symmetrically formed and are bent in advance in a V shape, and each of the blade portions 3a, 3a is left and right of the tape 4, respectively. The corners 4a, 4a of the rectangular shape are cut, and the left and right corners 4a, 4a of the tape 4 are cut at the same time. The base end portions of the two blade portions 3a, 3a have a connecting portion 3b.
Are joined by. The body portion 5a of the operation member 5 is provided with the button portions 5a, 5a corresponding to the blade portion 3a of the movable blade member 3 to cause the movable blade member 3 to be cut by pressing. This button part 5a,
The fixed blade member 2 and the movable blade member 3 are arranged so as to push the blade portions 3a of the movable blade member 3 inside the blade portions 3a.
The wrapping force and the twisting force also act as cutting tension.

In the movable blade member 3, as shown in FIGS. 6 and 7, the connecting portion 3b is the connecting portion 2 of the fixed blade member 2.
The blade portion 3a of the fixed blade member 2 is connected to the fixed blade member 2c at a predetermined angle (19 ° in the present embodiment) with respect to the blade portion 2a of the fixed blade member 2.
The screw 12 is applied and attached via a jig (not shown) so that the movable blade member 3 is moved in a substantially vertical direction to perform cutting. Therefore, the rotation angle is small, which is advantageous in terms of compactness.

The double-edged members 2 and 3 are made of a hard material such as stainless steel, and the blade portion 2a of the fixed blade member 2 is slightly harder than the blade portion 3a of the movable blade member 3. , It is designed to prevent damage during engagement. Further, since both members 2 and 3 are formed by punching and bending from a sheet metal by press molding, they can be easily manufactured.

Further, as shown in FIG. 8, at the time of cutting, the lap amount of the fixed blade member 2 with respect to the blade portion 2a gradually increases toward the tip side, and finally ΔL = about It wraps 0.3 mm.

Therefore, the blade portion 3a of the movable blade member 3 becomes closer to the tip end side during cutting, and the blade portion 2a of the fixed blade member 2 becomes closer.
Since the lapping amount with respect to a gradually increases, the movable blade member 3 moves in a direction away from the fixed blade member 2 as the cutting progresses, and the movable blade member 3 and the fixed blade member 2 always cut at one point. It will be done and a small load will be cut.

Further, as shown in FIG. 9, the tip surfaces 2s and 3s of the fixed blade member 2 and the movable blade member 3 are inclined at a constant angle (10 ° in the present embodiment). The collision between the two blade members 2 and 3 is eliminated, and the cutting is stable.

Further, the movable blade member 3 and the fixed blade member 2
Assembling with the blade portion 3a of the movable blade member 3 and the fixed blade member 2
Is performed by tightening the screw while applying a predetermined load to the rear end portion of the movable blade member 3 in a state where the fixed blade member 2 collides with the movable blade member 2 and the hardness of the fixed blade member 2 is higher than that of the movable blade member 2. Since it is large, the blade alignment can be completed by performing empty cutting several times after assembling.

Therefore, since it can be manufactured by a simple press part and the blades can be easily aligned and assembled, it is inexpensive and excellent in mass productivity.

Therefore, according to the above apparatus, the tape 4 is inserted in alignment with the guide groove portion 7a of the table member 7 and pushed into the stopper portion 8b of the insertion member 8 through the insertion opening 8a, and then the user operates the operation member 5. When pushed down, operation member 5
By the button portions 5a, 5a of the blade portion 3 of the movable blade member 3
a, 3a are pressed, the square corners 4a, 4a of the tape 4 are sandwiched between the fixed blade member 2, and the round corners 4b, 4a.
It is cut to be b.

Next, the state when the tape 4 is cut will be described in detail.

First, when the blade portions 3a, 3a of the movable blade member 3 are pushed down by the button portions 5a, 5a of the operation member 5, the curved portion of the blade portion 3a of the movable blade member 3 is guided (see FIG. 8), contact between the blade portion 3a of the movable blade member 3 and the blade portion 2a of the fixed blade member 2 starts. In the contact start state, the blade portion 3a of the movable blade member 3 is screwed while being pressed against the blade portion 2a of the fixed blade member 2, so that the tape 4 is first cut by the tension acting in this state. .

As the cutting progresses, the blade portion 3a of the movable blade member 3 is designed so that the lapping amount increases with respect to the blade portion 2a of the fixed blade member 2 toward the tip side. As the cutting progresses, the blade portion 3a moves in a direction away from the blade portion 2a (leftward in the drawing). Therefore,
The blade portion 3a of the movable blade member 3 and the blade portion 2a of the fixing force member 2 always cut at one point, and the cutting is performed with a small load.

By the way, a cutting tension in a direction away from the blade portion 2a is required from the middle of the cutting, but the movable blade member 3 is formed by the button portions 5a and 5a of the operating member 5 and the blade portion 3a.
Since the insides of a and 3a are pushed, the twisting force due to the lap between the fixed blade member 2 and the movable blade member 3 also acts as a cutting tension.

[0031]

The present invention is carried out in the form as described above and has the following effects.

At the time of cutting, the blade portion of the movable blade member is designed to gradually increase the amount of lap with respect to the blade portion of the fixed blade member toward the tip side. Therefore, as the cutting progresses, the movable blade member moves. Since the member moves in a direction away from the fixed blade member, the movable blade member and the fixed blade member always perform cutting at one point, and the cutting can be performed with a small load.
In addition, since the movable blade member and the fixed blade member can be manufactured by press parts, the blade alignment and assembly are easy, the cost is low, and the mass productivity is excellent.

Further, since the button member pushes the inside of the blade portion of the movable blade member for cutting, the twisting force due to the lap between the fixed blade member and the movable blade member can also act as the cutting tension. .

Since the tip surfaces of the fixed blade member and the movable blade member are inclined at a constant angle, collision between the two blade members is eliminated, and cutting can be stabilized.

Since the pair of left and right symmetrically formed blade portions of the movable blade member respectively cut the left and right corner portions of the tape, the left and right corner portions of the tape can be cut at the same time.

Since the blade portion of the fixed blade member is slightly harder than the blade portion of the movable blade member, it is possible to prevent breakage during engagement.

[Brief description of drawings]

FIG. 1 is a plan view of a tape trimming device according to the present invention.

FIG. 2 is a vertical sectional view of the same.

FIG. 3A and FIG. 3B are diagrams showing the tape before and after cutting, respectively.

4A to 4C are a plan view, a side view, and a front view of a fixed blade member, respectively.

5A and 5B are a plan view and a side view of a movable blade member, respectively.

FIG. 6 is a plan view showing a state in which a fixed blade member and a movable blade member are connected to each other.

FIG. 7 is a vertical sectional view of the same.

FIG. 8 is a diagram showing a relationship between blades of a fixed blade member and a movable blade member.

9 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 Tape trimming device 2 Fixed blade member 2a blade 3 movable blade members 3a blade 4 tapes 4a corner-shaped corner 4b Rounded corner 5 Operation member 5a Button part

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takuya Suetani 2-10-18 Higashi-Kanda, Chiyoda-ku, Tokyo Inside King Jim Co., Ltd. (72) Tomoyuki Shinmura 2-10-18 Higashi-Kanda, Chiyoda-ku, Tokyo King Jim Co., Ltd. (72) Inventor Takashi Ogawa 2-10-18 Higashi-Kanda, Chiyoda-ku, Tokyo Inside King Jim Co., Ltd. (72) In-house Miwa Kanda 2-10-18, Higashi-Kanda, Chiyoda-ku, Tokyo Inside King Gym, Inc. (56) References JP-A-8-323687 (JP, A) JP-A-3-278973 (JP, A) JP-A-7-214493 (JP, A) Actual Development Sho 61-30473 (JP, U) (JP 58) Fields investigated (Int.Cl. ⁷ , DB name) B26D 1/08

Claims (5)

(57) [Claims] 1. A tape trimming device for cutting a corner portion of a tape into a round shape or a linear shape by a fixed blade member and a movable blade member, wherein the movable blade member has a leaf spring shape and its blade portion is It is attached so as to form a predetermined angle with respect to the blade portion of the fixed blade member, and the blade portion of the movable blade member has a wrap amount with respect to the blade portion of the fixed blade member at the tip side during cutting. A tape trimming device having a gradually increasing shape. 2. The button member according to claim 1, further comprising a button member for pressing the movable blade member to cut the movable blade member, the button member pushing the inside of the blade portion of the movable blade member. Tape trimming device. 3. The fixed blade member and the movable blade member have tip surfaces inclined at a constant angle.
Or the tape trimming device described in 2. 4. The movable blade member has a pair of symmetrical left and right blade portions, and each blade portion cuts the left and right corner portions of the tape. The tape trimming device according to any one of 1. 5. The blade portion of the fixed blade member is slightly harder than the blade portion of the movable blade member.
4. The tape trimming device according to any one of 4 to 4.