JP5927459B1 - Launch pad for small rocket - Google Patents

Abstract

A launch pad for a small rocket is provided. The main structure of a launch pad for a small rocket is composed of a lower support plate, legs, a rocket guide, an upper plate, a thrust measuring unit, and a protective plate. By installing a small rocket on the launch pad and conducting a rocket launch experiment on the launch pad, it is possible to measure the rocket thrust during the flight while demonstrating the rocket flying safely indoors. [Selection] Figure 1

Description

    The present invention relates to a launch pad for a small rocket.

  Conventionally, small rocket launchpads such as plastic bottle rockets, model rockets, and toy rockets are installed outdoors, so rocket flight experiments are influenced by the weather, and it is difficult to conduct experiments during strong winds or heavy rains. Met.

  The performance of small rockets such as plastic bottle rockets, model rockets, and toy rockets was calculated from the altitude reached or the flight distance, and the thrust was not measured while flying.

Japanese Patent Laid-Open No. 11-327474 JP-A-9-294874

  In order to solve the above problems, it is necessary to be able to safely perform flying demonstration and measurement of rocket thrust of small rockets such as plastic bottle rockets, model rockets and toy rockets of different thickness even indoors regardless of the weather There is.

  In order to achieve the demonstration of a small rocket safely in the room, which is the object of the present invention, the launch pad for the small rocket of the present invention includes a lower support plate that supports the small rocket before launch, and a leg that supports the launch pad. It consists of a rocket guide that restricts the flight path after launching the rocket, and an upper plate that receives thrust during the launch of the rocket.

  In order to allow even small rockets of different thicknesses to fly safely, the upper plate and the lower support plate can be provided with adjustment slits that can adjust the rocket guide interval radially from the plate center.

  A protective plate can be installed to protect the observer from flying objects caused by unexpected rocket explosions.

  In order to measure the thrust of the flying rocket, a thrust measuring device for measuring the thrust can be provided in the approximate center of the upper plate.

  As described above, according to the present invention, it is possible to carry out a rocket flight experiment indoors and outdoors, but it is possible to demonstrate a rocket flight experiment safely indoors regardless of the weather. It can also be used as a teaching material for rocket education in the room.

In addition , there is an effect that can be easily and safely dealt with in a flight experiment of small rockets of different thicknesses.

According to the second aspect , since the observer can be protected from the flying object due to the unexpected explosion of the small rocket, it can be used as a teaching material for a rocket education experience that is performed in a room where safety is particularly important.

According to the third aspect of the present invention, the thrust measurement device can be measured while flying a small rocket by installing a thrust measuring device substantially at the center of the upper plate.

  The perspective view of the launch pad for the small rocket of the present invention   1 is a perspective view of the launch pad without a small rocket from FIG.   Schematic of the launch pad with the small rocket in Fig. 1 flying   Plan view of the lower support plate of the launch pad of FIG.   1 is a perspective view of a protective plate installed on the launch pad of FIG.   Front view of a launch pad for a small rocket equipped with a thrust meter   Front view of launch pad when launch pad of the present invention is installed sideways

  FIG. 1 shows a basic form of a launch pad for a small rocket according to the present invention. The small rocket 1 in FIG. 1 is a small thrust rocket having a thrust of 20 kgf or less, such as a plastic bottle rocket, a model rocket, a toy rocket, or the like.

  Reference numeral 2 in FIG. 1 denotes a lower support plate. A rocket installation hole 3 having a diameter smaller than the thickness of the rocket is formed in the center of the lower support plate 2 as shown in FIG. The small rocket 1 can be placed stably.

  Below the lower support plate 2 is a leg 4. By selecting the leg 4 having an appropriate length, the position of the rocket before launching can be installed at a moderate height.

  A rocket guide 5 is installed on the lower support plate 2, and the rocket guide 5 is fixed by an upper plate 6 so that the rocket guides 5 are substantially parallel to each other.

  For example, screws are cut at both ends of the rocket guide 5, and the lower support plate 2 and the upper plate 6 and the rocket guide 5 are fixed with nuts or the like. Thus, the launch pad can be disassembled and the rocket guide 5 can be easily replaced.

  After launch, the small rocket 1 rises along the rocket guide 5 and hits the upper plate 6. This state is shown in the schematic diagram of FIG.

  A plan view of the lower support plate 2 is shown in FIG. The circle 8 in FIG. 4 is the outer circle of the cross section of the small rocket 1 in FIG. 1 and indicates the maximum thickness of the small rocket. The intervals a and b of the rocket guides in FIG. 4 are slightly narrower than the diameter c of the circle 8 indicating the thickness of the rocket, so that the rockets do not jump out between the rocket guides 5. This makes it possible to conduct rocket flight experiments even indoors.

  Although four rocket guides 5 are depicted in FIG. 1, it is preferable in terms of safety that the number of rocket guides is large. However, if there are at least three rocket guides, the rocket flight experiment according to the present invention can be carried out safely.

  In the lower support plate 2 of FIG. 4, adjustment slits (lower portions) 9 for adjusting the distance between the rocket guides are provided radially from the center of the plate according to the number of rocket guides 5. Similar slits are provided in the upper plate 6 of FIG.

  Accordingly, adjustment of the rocket guide interval by the adjustment slit (lower part) 9 provided in the lower support plate 2 in FIG. 5 and the adjustment slit (upper part) 10 provided in the upper plate 5 in FIG. Even a rocket having a height can be restricted within the rocket guide 5.

  As shown in FIG. 5, if a protective plate 11 made of transparent transparent plastic such as polycarbonate is placed on the launch pad so as to be substantially parallel to the launch pad using the protective plate mounting jig 13 or the like, Even if an unexpected rupture occurs, the rocket fragments can be prevented from scattering toward the observer.

  FIG. 6 is a front view in which a thrust measuring device 12 is installed on the lower side of the upper plate 5 of the launch pad for a small rocket of the present invention. The thrust measuring instrument 12 shown in FIG. 6 converts the force applied to the measuring instrument into an electric signal. A commercially available load cell is used for the measuring instrument, or the strain due to the thrust applied to the upper plate is determined by a strain gauge and a strain. By using the measuring device, the force applied to the measuring device can be measured.

  Therefore, it is possible to measure the thrust during the rocket flight by installing a thrust measuring device in the approximate center of the upper plate.

  When it is desired to reduce the error in thrust measurement at the time of launching the rocket, the length of the rocket guide 5 in FIG. 6 is shortened. If you want to prioritize the force of the rocket flight demonstration, the longer the rocket guide 5, the more powerful it will be. Depending on the purpose of use, the length of the rocket guide 5 may be changed, and the upper plate 6 and lower support The distance between the plates 2 is adjusted.

  In addition, when flying a rocket outdoors, the rocket can be injected into the air like a conventional rocket launch pad by removing the upper plate 6.

  Furthermore, if the shapes of the upper plate 6 and the lower support plate 2 are made into rectangles having the same length of one side of each plate, a horizontal combustion experiment can be easily performed as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Small rocket 2 Lower support plate 3 Rocket installation hole 4 Leg 5 Rocket guide 6 Upper plate 7 Small rocket in flight 8 Circle indicating thickness of rocket 9 Adjustment slit (lower part)
10 Adjustment slit (top)
11 Protection plate 12 Thrust measuring instrument 13 Protection plate mounting jig

Claims (3)

A launch pad for a small rocket with a thrust of 20 kgf or less, a lower support plate and legs that support the small rocket before launch, a rocket guide that restricts the flight path of the small rocket after launch, and an upper plate that receives the thrust of the small rocket Tona is, depending on the thickness of the small rockets, to adjust the spacing between rockets guide, adjusting a slit for causing the flying safely small rockets in different small rockets of thickness of each plate to the upper plate and the lower support plate small rocket launcher you and being provided radially from the center. Launch pad for small rockets according to claim 1 Symbol mounting and having a protective plate to protect the observer from debris by rupture of a small rocket. The launch pad for a small rocket according to claim 1 or 2, wherein a thrust measuring device for thrust measurement is provided at substantially the center of the upper plate.

Images