JPH0724383Y2 - Sound generation mechanism of crane suspension hook - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound generating mechanism of a crane suspension hook for ensuring the safety of an operator near the suspension hook when the crane is hoisting and lowering.

[0002]

2. Description of the Related Art Conventionally, sound generation by a buzzer or the like in the vicinity of a crane operating section has been used as a warning means for surrounding workers during crane operation.

[0003]

The conventional sound-generated alarm may be dangerous because it does not reach the worker around the suspension hook that is far from the driver's seat.

An object of the present invention is to provide a sound generating mechanism for a crane hanging hook, which gives a warning directly to a worker around the hanging hook.

[0005]

According to the present invention, a plurality of protrusions are provided on a sheave side surface of a crane suspension hook, and a fixing member of the hook interferes with the protrusions to generate sound. The body is protruding.

It is preferable that the sound generator is composed of a metallic diaphragm used in a music box.

Further, it is preferable that a plurality of protrusions are provided on a plurality of concentric circles so as to play a melody.

[0008]

In the sound generating mechanism of the crane suspension hook configured as described above, the sheave rotates due to hoisting and lowering of the crane, and the rotating rotating projection interferes with the sound generating body to generate sound. Directly alert the workers around the hanging hook.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a main body 2 of a crane suspension hook, generally designated by reference numeral 1, is a pair of side plates 3 having an oval shape or the like.
Is formed by connecting the top part of the base plate with an arc-shaped top plate 4 and connecting the bottom part with a bearing cover 5.
A hook portion 7 is suspended from the bearing via a bearing 6.

A shaft 8 is provided substantially in the center between the side plates 3 and 3, and a pair of sheaves 10 and 10 around which a suspension wire 9 is wound are rotatably supported on the shaft 8. There is.

On the outer surface of one of the sheaves 10, a plurality of (three in the illustrated example) concentric circles are provided with a plurality of protrusions, that is, rectangular metal pieces 11.

On the other hand, on the side plate 3 on the side opposite to the piece 11, a sound generator, that is, a metal vibrating plate 12 is provided so as to project at a position where it interferes with the piece 11 rotating with the sheave 10. As shown in FIG. 4, this diaphragm 12 is used for a music box, and three vibrating pieces 14a to 14c are formed by slits 13a and 13b of a double row (two rows in the illustrated example). ing.

Next, the operation will be described.

When the crane is hoisted and lowered, the sheave 10
Rotates. Then, the rotating sheave 10 turns the pieces 11, 11, ... As shown in FIG.
2 vibrating piece 14a. Therefore, the vibrating piece 14
A deforms and vibrates to generate sound. Since this sound is generated by the hanging hook 1, it is a direct alarm to the workers around the hanging hook 1. Further, since a plurality of pieces 11 are provided on three concentric circles, the vibrating pieces 14a to 14c generate a melody alarm sound.

[0016]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the piece and the vibrating plate can directly generate an alarm sound from the hanging hook to the surrounding workers to improve safety.

Further, since the structure is simple and no electric power is required, it can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a piece and a diaphragm.

FIG. 4 is a diagram corresponding to FIG. 3 for explaining a state of sound generation.

[Explanation of symbols]

 1 ... Crane hanging hook 2 ... Main body 3 ... Side plate 4 ... Top plate 5 ... Bearing cover 6 ... Bearing 7 ... Hook part 8 ... Shaft 9 ... Hanging wire 10 ... Sheave 11 ... Piece 12 ... Vibration plate 13a, 13b ... Slit 14a, 14b, 14c ... Vibration piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroaki Matsuda, Inventor Hiroaki Matsuda Kitasanjo Nishi 3-chome, Chuo-ku, Sapporo, Hokkaido Kashima Construction Co., Ltd., Sapporo Branch (72) Satoshi Minami 6 Nakamachi, Naka-ku, Hiroshima-shi, Hiroshima No. 13 Kashima Construction Co., Ltd. Hiroshima Branch (56) References JP-A-50-131249 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A crane suspension hook is provided with a plurality of protrusions on a sheave side surface thereof, and a fixing member of the hook is provided with a sound generator that interferes with the protrusions to generate sound. Sound generation mechanism for crane suspension hook.