JPH0986805A - Braking device for cable drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device for a cable drum which safely reliably works. SOLUTION: A piston rod 24 is pressed down by depressing a pedal 25 of a hydraulic pump 22. Pressurized oil is supplied to a cylinder 11 to push up a piston rod 12 against the spring elastic force of a return spring. When the piston rod 12 is pushed up, a brake applying body 16 is moved up to put a brake lining 19 mounted on a brake shoe 18 into contact with the outer peripheral surface of the flange 3 of a cable drum 1, thereby applying braking force on the cable drum 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable drum braking device.

[0002]

2. Description of the Related Art When a cable wound around a winding drum of a cable drum is unwound and laid, a plate material or the like is slidably brought into contact with the outer periphery of a flange of the cable drum to brake. The overall weight of the cable drum around which the cable is wound may amount to 3 to 6 tons. For this reason, a large braking force is required to stop the cable drum that has once started to rotate due to the cable being unwound and to reduce the rotation speed. Therefore, the conventional method in which an operator brakes by using a plate material or the like has problems that not only safety cannot be ensured but also an emergency in which braking is required cannot be dealt with.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a cable drum braking device that operates safely and reliably.

[0004]

In order to achieve the above object, a cable drum braking device of the present invention is arranged such that a support shaft is provided on an upright support frame and the cable drum is rotatably mounted on the support shaft. A brake shoe is provided on the outer periphery of at least one flange of the cable drum so as to be able to come into contact with and separate from the flange, and the brake shoe is connected to a piston rod of a fluid pressure cylinder, and the brake is applied by fluid pressure supplied to the fluid pressure cylinder. It is characterized in that the contacting / separating operation of the shoe is controlled to brake.

[0005]

According to the cable drum braking device having the above structure, the fluid pressure supplied to the fluid pressure cylinder controls the contact / separation of the brake shoe with the flange of the cable drum to brake the cable drum. Since the fluid pressure is used, it is possible to quickly adjust the feeding speed of the cable and stop the cable drum. Further, since remote operation is possible, there is an effect that safety can be surely enhanced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings. Cable drum 1 as shown in FIG.
The ring-shaped flanges 3 are formed on both sides of the winding drum 2. A cross frame 4 is formed at the center of the flange 3. A support shaft 5 is loosely inserted in the center of the cross frame 4. On both sides of the cable drum 1, support bases 6 are arranged, and both ends of the support shaft 5 are supported, so that the cable drum 1 is rotatably mounted.

In the support base 6, a screw type jack 8 is erected at the center of a substrate 7, and a shaft support bracket 10 is provided on the upper end of a screw rod 9.
It is the one that is pivotally attached. The support shaft 5 is inserted into and supported by the shaft support bucket 10. Further, a hydraulic single-acting cylinder (hereinafter simply referred to as a cylinder) 11 having an axis inclined toward the substantial center of the shaft support bracket 10 is fixed to the base plate 7. The cylinder 11 is provided with a piston rod 12 protruding from the upper end, and a return spring 13 is attached inside the cylinder 11. Piston rod 1
A male screw 14 is formed on the protruding portion of the second cylinder 11. A nut body 15 is screwed onto the male screw 14.

A brake actuation body 16 is rotatably fitted on the outer periphery of the nut body 15. As shown in FIG. 2, the brake operating member 16 is arranged along the outer periphery of the cylinder 11 and is prevented from rotating by a stopper 17. A brake shoe 18 facing the outer peripheral surface of the flange 3 of the cable drum 1 is formed at the lower end of the brake operating member 16, and a brake lining 19 is attached to the brake shoe 18. A hydraulic supply beak 20 is provided on the lower end side of the cylinder 11.

One end of a flexible pressure resistant hose 21 is connected to the hydraulic supply beak 20. A foot-operated hydraulic pump (hereinafter simply referred to as hydraulic pump) 22 is connected to the other end of the pressure resistant hose 21. The hydraulic pump 22 presses the oil filled in the cylinder 23 by the piston rod 24 to pressurize the oil and supply the oil to the cylinder 11. A pedal pedal 25 is fixed to the upper end of the piston rod 24.

The operation of the cable drum braking device having the above structure will be described below. When the cable 31 wound around the winding drum 2 of the cable drum 1 is unwound and laid, the unwinding speed of the cable 31 is adjusted, or the cable drum 1
It is necessary to apply a braking force to stop the rotation of the. In this case, the depression pedal 25 of the hydraulic pump 22 is depressed to push down the piston rod 24. This allows
The pressurized oil is supplied to the cylinder 11 to push up the piston rod 12 against the spring elasticity of the return spring 13. When the piston rod 12 is pushed up,
The brake actuating body 16 rises and the brake lining 19 attached to the brake shoe 18 makes sliding contact with the outer peripheral surface of the flange 3 of the cable drum 1, and a braking force is applied to the cable drum 1. When the foot is released from the pedal pressure pedal 25, the piston elastic force of the return spring 13 lowers the piston rod 12 to pressurize the oil and return it to the hydraulic pump 22. As a result, the pedal pressure pedal 25 rises and returns to the original position.

According to the above, the rotating cable drum 1
With the simple operation of stepping on the pedal pressure pedal 25 of the hydraulic pump 22 placed at a position away from the cable drum 1
Braking can be performed safely and reliably. Further, there is an advantage that the rotation speed of the cable drum 1 can be finely adjusted. Furthermore, the screw type jack 8 can adjust the height of the shaft support bracket 10 of the support frame 6 according to the outer diameter of the cable drum 1. Further, the nut 15 that is screwed into the male screw 14 of the piston rod 12 can be rotated to adjust the lifting stroke of the brake shoe 18.

Although the single-acting cylinder 11 is used in the above-described embodiment, pressure oil is supplied by the rotary hydraulic pump using the double-acting cylinder, and the switching valve is operated to switch the oil passage to brake the cable drum 1. It can also be controlled. Further, not only the hydraulic pressure but also the water pressure or the air pressure can be used to brake the cable drum 1.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a cable drum provided with a braking device according to the present invention.

FIG. 2 is an enlarged sectional view taken along line AA in FIG.

[Explanation of symbols]

1 → Cable drum 2 → Coil drum 3 → Flange 4 → Cross frame 5 → Support shaft 6 → Support frame 7 → Substrate 8 → Screw jack 9 → Screw rod 10 → Axial support bracket 11 → Cylinder 12 → Piston rod 13 → Return Spring 1
4 → Male screw 15 → Nut body 16 → Brake actuating body 17 → Stopper 18 → Brake shoe 19 → Brake lining 20
→ hydraulic supply beak 21 → pressure resistant hose 22 → hydraulic pump 23 → cylinder 24 → piston rod 25 → pedal pedal 31 → cable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuro Tsunoda 4-33-3 Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd. (72) Inventor Tadashi Nagumo 4-33-3 Shibaura, Minato-ku, Tokyo Shares Company KANDENKO (72) Inventor Katsuhiro Takeda 1-5-11 Nihonbashi-Horidome-cho, Chuo-ku, Tokyo Shirayama Trading Co., Ltd. Takakura Giken Co., Ltd.

Claims (1)

[Claims] 1. A support shaft is passed over a vertically installed support frame,
A cable drum is rotatably mounted on the support shaft, a brake shoe is disposed on the outer periphery of at least one flange of the cable drum so as to be able to come into contact with and separate from the flange, and the brake shoe is connected to a piston rod of a fluid pressure cylinder. A braking device for a cable drum, wherein the brake pressure is controlled by controlling the contact / separation operation of the brake shoe by the fluid pressure supplied to the fluid pressure cylinder.