JP3003628U - Lifting device for ultrasonic transducer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an ultrasonic wave transmitter / receiver lifting device capable of reducing cost while increasing bending moment strength of the ultrasonic wave transmitter / receiver lifting device. [Structure] A bearing part 3 for slidably supporting a sliding shaft 2 to which an ultrasonic wave transmitter / receiver 1 is fixed is provided, and an inner peripheral surface of a storage tank 6 for storing the ultrasonic wave transmitter / receiver 1 is In the elevation device of the ultrasonic wave transmitter / receiver including the sliding guide ring 4, a compression coil spring 5 is provided between the bearing portion 3 and the guide ring 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, an ultrasonic wave transmitter / receiver that emits ultrasonic waves and detects a fish school from the reflected waves is projected (lowered) from, for example, the bottom of a ship to a used state, and then raised from the used state to a stored state. Lifting device for. In particular, the present invention relates to a lifting device for an ultrasonic wave transmitter / receiver in which the strength of the lifting device is increased without increasing costs.

[0002]

[Prior art]

 A device shown in FIG. 3 is conventionally known as this type of device. In FIG. 3, a sliding shaft 2 to which a transducer 1 is fixed at its front end is supported by a bearing portion 3 and moves the ultrasonic transducer 1 up and down.

When the vessel travels while the ultrasonic wave transmitter / receiver 1 is in use, the wave transmitter / receiver 1 receives the resistance (F 2) of seawater, and the bearing 3 supporting the slide shaft 2 has a maximum of the slide shaft 2. Bending moment occurs.

This bending moment is represented by the arm length L1X resistance force F. In the conventional structure as shown in FIG. 3, since the length L1 from the bearing 3 to the tip of the ultrasonic transmitter / receiver 1 is long, a large bending stress is applied to the sliding shaft 3.

Therefore, it is necessary to increase the diameter of the sliding shaft in order to obtain the strength required to prevent damage.

However, as the sliding shaft becomes thicker, the entire lifting device also becomes large, and since the sliding shaft itself is the most expensive part of the lifting device, there is a disadvantage that the price of the lifting device becomes high. .

In order to solve the above-mentioned inconvenience, a conventional lifting device shown in FIG. 4 is also known. In FIG. 4, a guide ring 4 fixed to the sliding shaft 2 is provided between the ultrasonic wave transmitter / receiver 1 and the bearing portion 3.

For example, the disc-shaped guide ring 4 slides on the inner peripheral surface of the cylindrical storage tank 6 to reduce the length of the leg on which the bending moment acts when the ultrasonic transducer is used. It is what

Since the guide ring 4 is in the solid line position shown in the figure when the ultrasonic transmitter / receiver 1 is in the projected use state, the force due to the bending moment due to the seawater resistance during use causes the length L2 of the sliding shaft 2 (L1 above). The force of a relatively small bending moment due to (shorter) is only applied to the storage tank 6 and the like via the guide ring 4.

Therefore, the bending moment applied to the sliding shaft 3 is significantly reduced. However, in the elevating device having this structure, when the ultrasonic transducer 1 is stored, a waste space called the space A is generated between the ultrasonic transducer 1 and the bearing portion 3 (see the storage shown in FIG. 3). Since the lifting device becomes large due to an increase in the length of the storage tank 6 (compared to the length of the tank), there is a disadvantage that it cannot be installed in a small ship.

[0011]

[Problems to be solved by the device]

 The present invention aims to solve the above-mentioned drawbacks of the conventional technology, and enhances the strength of the lifting device against bending moments due to seawater resistance during use, and the lifting device as a whole while suppressing the price of the sliding shaft. It is an object of the present invention to provide an ultrasonic wave transmitter / receiver lifting device that is downsized and can be installed in small vessels.

[0012]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems of the prior art, the present invention is provided with a bearing portion slidably supporting a sliding shaft to which an ultrasonic wave transmitter / receiver is fixed, and the ultrasonic wave transmitter / receiver In a lifting device for an ultrasonic wave transmitter / receiver having a guide ring that slides on an inner peripheral surface of a storage tank to be stored, the guide ring is slidably provided on the sliding shaft, and the bearing portion and the guide ring are provided. A compressible elastic member is provided between the two.

[0013]

[Action]

 According to the present invention, when the ultrasonic wave transmitter / receiver is used, the bending moment due to seawater resistance does not reach the portion of the sliding shaft that abuts on the bearing portion, and the sliding shaft has a relatively short sliding moment. The moment applied to the moving shaft is a relatively small bending moment.

Therefore, as a result of significantly reducing the bending moment applied to the sliding shaft, it is possible to design the sliding shaft finely and reduce the cost.

In addition, the strength of the lifting device against bending moment due to seawater resistance during use is high, and the lifting device can be downsized while keeping the price of the sliding shaft small. It is also possible to equip.

[0016]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

In FIGS. 1 and 2, members that are the same as or equivalent to the members described in FIGS. 3 and 4 are given the same reference numerals, and detailed description thereof will be omitted.

For example, the disk-shaped guide ring 4 slides on the inner peripheral surface of the cylindrical storage tank 6, which is equivalent to the conventional example shown in FIG. 4, but is different from the conventional example. The compression coil spring 5 is suspended between the guide ring 4 and the bearing portion 3.

In FIG. 1 showing a state where the ultrasonic transducer 1 is projected from the ship bottom plate 8, the compression coil spring 5 has a projection 7 (circumferential direction) in which the guide ring 4 is provided on the ship bottom plate 8. , The guide ring 4 is pressed downward in the drawing until it abuts against the four protrusions.

As a result, a bending moment due to seawater resistance does not reach the bearing portion 3, and a relatively small bending moment due to the length L2 of the sliding shaft (shorter than L1 shown in FIG. 3) is applied to the bottom plate 8. Only.

Therefore, the bending moment applied to the sliding shaft 3 is significantly reduced. As a result, the sliding shaft can be designed to be thin, and the cost can be reduced.

The projecting operation and the retracting operation of the ultrasonic wave transmitter / receiver 1 are performed by another electric drive means (not shown), and the locking of the ultrasonic wave transmitter / receiver at the retracted position is performed by another member. It is performed by a stop means (not shown).

FIG. 2 shows a state in which the compression coil spring 5 is compressed by the driving means described above and the ultrasonic wave transmitter / receiver 1 is housed in the storage tank 6.

In this way, the length of the storage tank 6 is as compact as that shown in FIG.

The compression coil spring 5 described in the above-described embodiments may be another elastic member such as a compressive spring or a compressible synthetic resin.

[0026]

[Effect of device]

 As mentioned above, it is possible to increase the ship's withstand speed without increasing the size of the lifting device as a whole, and it is possible to design the sliding shaft to be thin and reduce the cost. Becomes Therefore, the lifting device according to the present invention can be sufficiently applied to a small ship with a high ship speed.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a state where a compression coil spring is extended in an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a compressed state of a compression coil spring in the embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view showing a conventional lifting device.

FIG. 4 is a schematic sectional view showing another example of a conventional lifting device.

[Explanation of symbols]

 1 Ultrasonic Transducer 2 Sliding Shaft 3 Bearing 4 Guide Ring 5 Compression Coil Spring 6 Storage Tank 7 Protrusion 8 Bottom Plate

Claims (2)

[Scope of utility model registration request] 1. A bearing part for vertically slidably supporting a sliding shaft to which an ultrasonic wave transmitter / receiver is fixed, and sliding on an inner peripheral surface of a storage tank storing the ultrasonic wave transmitter / receiver. In an elevation device for an ultrasonic wave transmitter / receiver including a guide ring, the guide ring is slidably provided on the sliding shaft, and a compressible elastic member is provided between the bearing portion and the guide ring. Elevating device for ultrasonic wave transmitter / receiver. 2. The lifting device for an ultrasonic wave transmitter / receiver according to claim 1, wherein the compressible elastic member is a compression coil spring.