JPH0356878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a strip cutting device, and more particularly to a strip cutting device that can reliably cut a strip with a single instantaneous cutting operation.

[Prior art and its problems] Conventionally, scissors, cutters, etc. are used to cut strips such as ropes, strings, ropes, wires, ropes, etc., but in either case, when the strip is thick, only one cut is required. It is not possible to reliably separate the strips by operation, and a large force is required to reliably cut the strips, which results in a large cutting device such as a cutter.

In recent years, there has been a demand for cutting devices that can reliably cut strips in a single cutting operation for safety devices and other various devices.

[Object of the Invention] The present invention has been made based on the above-mentioned circumstances, and provides a strip cutting device that can reliably cut a strip with a single cutting operation and with a simple operation that does not require any force. The purpose is to provide the following.

[Structure and Examples of the Invention] This invention will be described with reference to examples shown in the drawings.

As shown in FIGS. 1 and 2, near one end of a hollow cylindrical body 1, a strip insertion hole 2 is provided which penetrates from one side of the body 1 to the other side.
The cylindrical body 1 may be a cylindrical body or a rectangular cylindrical body, but is preferably a cylindrical body in terms of ease of processing. The diameter of the strip insertion hole 2 is preferably approximately equal to the diameter of the strip to be cut.

A movable base plate 3 that is in close contact with the inner surface of the cylinder 1 and is slidable is arranged in the cylinder 1 at a portion opposite to one end of the cylinder 1 with respect to the strip insertion hole 2. A cutting blade 4 is provided upright on one surface of the movable base plate 3 facing the one end of the cylinder 1, and the cutting edge of the cutting blade 4 is connected to one surface of the cylinder 1 and the strip. It is located between the insertion hole 2 and the insertion hole 2. Also,
A gas generating agent 5 is filled between the other end of the cylinder 1 and the other surface of the movable substrate 3.

The movable substrate 3 is brought into close contact with the inner surface of the cylindrical body 1 in order to prevent gas generated from the gas generating agent 5 from leaking between the inner surface of the cylindrical body 1 and the end surface of the movable substrate 3. The expansion pressure of the gas causes this moving substrate 3
This is to ensure that the load is applied to The movable base plate 3 is made slidable in order to smoothly move the cutting blade 4 forward due to the expansion pressure of the gas.

As the gas generating agent 5, gunpowder can usually be used. The gas generating agent 5 may be directly filled between the other end of the cylindrical body 1 and the other surface of the movable substrate 3, but it may be filled in a pressure-resistant container, such as a metal container, and the A container manufactured by the manufacturer may be loaded into the cylindrical body 1.

Gas generation from the gas generating agent 5 is performed by a starter device, and in this embodiment, the starter device is inserted into an ignition ball 6 embedded in the gas generating agent 5 filled in the cylinder 1. Heat generating resistance wire 7
, a power supply V connected to this heat generating resistance wire 7 via a conductive wire 8, and a switch SW. This conductive wire 8 extends from the cylindrical body 1 and extends from the cylindrical body 1.
The heating resistance wire 7 and the switch located outside the
Since it is connected to the SW, it is convenient because it can be started remotely. However, the switch SW may be provided on the outer surface of the cylindrical body 1, and the conductive wire 8 and the power source V may be housed within the cylindrical body 1. Moreover, a seawater battery may be used instead of the starting device.

The strip cutting device shown in Fig. 1 has a switch SW.
When turned on, a current flows from the power supply V to the heat generating resistance wire 7, igniting the ignition ball 6, and as a result, the gunpowder, which is the gas generating agent 5, is rapidly combusted and gas is generated. When expansion pressure due to gas generation is applied to the movable substrate 3, as shown in FIG. 2, the movable substrate 3 moves forward instantaneously, and the cutting blade 4 moves forward instantaneously with a large force.
The strip inserted into the strip insertion hole 2 is cut in one shot.

Note that if a gas venting groove or a gas venting taper is provided in the cylinder 1 from the position of the movable base plate 3 to the strip insertion hole 2 when the advancing cutting blade 4 comes into contact with the strip, this gas can be removed. High-temperature combustion gas can be ejected from the extraction groove or taper toward the strip, and the strip can be cut by the cutting blade 4 and burnt off by the combustion gas.
The strip can be cut more reliably.

In addition, what is shown by 9 is a blade.

What is shown in FIGS. 1 and 2 is a prototype of this invention, and this invention is not limited to what is shown in FIGS. 1 and 2, but can be modified and modified within the scope of the invention. Needless to say, modifications can be made.

FIG. 3 shows a second embodiment.

As shown in FIG. 3, the strip cutting device includes a cylindrical body 10 having one end open, and a rotatably provided lid portion 11 at the opening of the cylindrical body 10. A circular first notch 12 is opened.
Further, a pair of second notches 13 are opened at the open end of the lid portion 11, and the first notch 12 and the second notch 13 meet to form the strip insertion hole 2. is beginning to form. Inside the cylindrical body 10, a movable base plate 3 having a cutting blade 4 erected thereon similar to that in the first embodiment is disposed in close contact with the inner surface of the cylindrical body 10 and slidably thereon.

A gas generating agent cartridge 1 is disposed inside the cylinder 10 between the other end of the cylinder 10 and the movable substrate 3.
A cartridge compartment for storing 4 is provided.
An opening/closing lid 15 is attached to the circumferential side of the cylindrical body 10, and by opening the opening/closing lid 15, the gas generating agent cartridge 14 can be stored in the cartridge chamber. . Further, within the cartridge chamber, a positioning projection 16 and a biasing member, for example, three springs 17, for pressing the gas generating agent cartridge 14 against the positioning projection 16 are provided. Conductive wires 8 are connected to two of the three springs 17, and the conductive wires 8 extend from the cylindrical body 10 and are connected to the power source V and the switch SW.

The gas generating agent cartridge 14 is a cylindrical housing with one end open, and the ignition powder 1 is inserted from the bottom surface of the cylindrical housing.
8 and gas generating agent 5 in this order, the opening at one end is sealed with a sealing plate 19, and the bottom surface of the cylinder 10 is embedded in the ignition charge 18 at a position where the spring 17 contacts. A metal plate 20 is attached to support the heating resistance wire 7.

The strip cutting device having the configuration shown in FIG. 3 first rotates the lid 11 to open one end of the cylinder 10, and applies the strip to the pair of exposed first notches 12. Next, the lid portion 11 is rotated to close the cylindrical body 1.
0 is closed, and in this way, the strip is communicated with and fixed in the strip insertion hole 2. Then, the opening/closing lid 15 is opened, and the gas generating agent cartridge 14 is loaded into the cartridge chamber with its bottom touching the spring 17. Switches not shown in Figure 3
By turning on the SW, the heating resistance wire 7 is energized and the ignition powder 18 is ignited. By igniting the ignition powder 18, the gas generating agent 5 is combusted to generate gas, and a rapid expansion pressure of the gas is applied to the movable substrate 3. The movable base plate 3 moves forward instantaneously and the cutting blade 4
bisects the striae. Note that if a gas vent hole 21 is provided on the circumferential side of the cylindrical body 10 at a position where the movable substrate 3 passes immediately after the cutting blade 4 cuts the strip, the cylindrical body 10 will be removed by gas expansion pressure. can be prevented from exploding. However, the same effect can be obtained by providing the above-mentioned gas vent groove or taper instead of the gas vent hole.

The strip cutting device shown in FIG. 3 is convenient for cutting strips formed into loops, and the gas generating agent 5 can be loaded into the cylindrical body 10 in a cartridge manner. The device can be used over and over again without becoming a consumable item.

[Effects of the Invention] The strip cutting device of the present invention has a simple structure, so it can be made small and portable, and the rapid expansion pressure of the gas allows it to cut any strip at once. This can be reliably cut with the cutting action of . This strip cutting device can be applied to various devices.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the invention, FIG. 2 is a sectional view showing the operating state of the embodiment, and FIG. 3 is a sectional view showing a second embodiment of the invention. be. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 2... Strip insertion hole, 3... Moving board, 4... Cutting blade, 5... Gas generating agent.

Claims (1)

[Scope of Claims] 1. A cylinder having a strip insertion hole penetrating from one side to the other side near one end, and disposed on the side opposite to the one end of the cylinder with respect to the strip insertion hole. a movable substrate that is in close contact with and slidable on the inner surface of the cylindrical body; and an outer circumferential surface that is provided on the movable substrate and that slides on the inner circumferential surface of the cylindrical body; a cutting blade having a tapered surface that slopes toward the central axis of the cylindrical body from the tip thereof; and a gas generating agent disposed behind the cutting blade in the cylindrical body and generating gas by a starter device. A cutting device characterized in that the moving board is advanced by the expansion pressure of the gas generated from the gas generating agent by a starting device, and the strip inserted into the strip insertion hole is cut with a cutting blade. . 2. The strip cutting device according to claim 1, wherein the gas generating agent is gunpowder.