JPH0712392Y2 - Brake device in winch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a brake device in a winch device.

[Prior Art] Some winch devices are provided with a main winding winch and an auxiliary winding winch, and each of the main winding winch and the auxiliary winding winch can be braked by stepping or automatically. An example of such a conventional winch device is shown in FIG.

In FIG. 2, 1a is a main winding winch and 1b is an auxiliary winding winch. The brake drums 2a, 2b of the main winding winch 1a and the auxiliary winding winch 1b are wound with brake bands 3a, 3b having brake shoes attached, and one ends of the brake bands 3a, 3b are fixed to brackets 4a, 4b. , Brake band 3a, 3b
The other end of is connected to one end of links 6a, 6b pivotally attached to the brackets 5a, 5b so as to be vertically rotatable.

When the brake pedals 7a, 7b are depressed on the brackets 10a, 10b, the brackets 10a, 10b are rotated clockwise in FIG.
Links 9a and 9b, which are pulled back by springs 8a and 8b to return to their original positions by releasing their feet from 7a and 7b, are pivotally connected to the ends of phosphorus 9a and 9b opposite to springs 8a and 8b. Links 11a and 11b are links 13 pivotally attached to brackets 12a and 12b.
a, 13b is connected to one end, the other end of the links 13a, 13b and the ends of the links 6a, 6b on the side opposite to the brake bands 3a, 3b are the links 14a,
Connected by 14b.

The piston rods 18a and 18b of the automatic brake cylinders 17a and 17b in which the casings 15a and 15b are pivotally attached to the brackets 16a and 16b are connected from the brackets 5a and 5b pivot portions of the links 6a and 6b to the link portions 14a and 14b. Casing connected to the middle part 1
On the piston rod 18a, 18b side of 5a, 15b, springs 19a, 19b are housed so that the piston rods 18a, 18b are biased in the backward direction, and by the force of the springs 19a, 19b,
Links 6a, 6b, brake bands 3a, 3b, brake drum 2
The main winding winch 1a and the auxiliary winding winch 1b can be braked via a and 2b.

The solenoid valves 22a, 22b, the pipelines 37a, 37b, and the switching valves 23a, 23b are sequentially connected in series to the pipelines 21a, 21b connected in parallel to the hydraulic pump 20, and the pipelines connected to the switching valves 23a, 23b. 24a, 24b
Is connected to the head side oil chambers 25a and 25b in the casings 15a and 15b of the automatic brake cylinders 17a and 17b.

The conventionally known remote control valves 26a, 26b connected to a main pump (not shown) include a main winding winch 1a and an auxiliary winding winch 1a.
Pipe lines 27a, 27b for supplying oil to a hydraulic motor 1a for driving b and a hydraulic motor (not shown) for driving the auxiliary winding winch 1b are connected to the pipe lines 27a, 27b. Pilot lines 28a, 28b for switching the switching valves 23a, 23b are connected.

The cables 38a and 38b connected in parallel to the power supply 29 are connected to the automatic brake switches 30a and 30b, respectively, and the cables 38a and 38b are connected to the solenoid valves 22a and 22b to turn on the automatic brake switches 30a and 30b. , The solenoid valves 22a and 22b can be switched by turning them off.

In the figure, 31 is a relief valve, 32 is an oil tank, 33a and 33b are pins fixed to the links 6a and 6b, and 34a and 34b are piston rods 18a and 18b of the automatic brake cylinders 17a and 17b. , 33b can be fitted to the piston rods 18a, 18b, and elongated holes extending in the longitudinal direction of the piston rods, 35a, 35b are solenoid valves 22a, 2b when the solenoid valves 22a, 22b are not excited.
2b switching springs, 36a and 36b are pilot lines 28
A spring that switches the switching valves 23a and 23b when hydraulic pressure is not introduced to a and 28b.

When switching the automatic brake cylinders 17a, 17b to brake the brake drums 2a, 2b of the main winding winch 1a and the auxiliary winding winch 1b by stepping on the brake pedals 7a, 7b, first switch the automatic brake switches 30a, 30b. turn on. For this reason, the solenoid valves 22a, 22b are excited and switched, and the conduits 21a, 21b and 37a, 37b communicate with each other.

Also, operate the remote control valves 26a, 26b to operate the pilot lines 28a, 2
When hydraulic pressure is applied to 8b, the switching valves 23a, 23b are switched, and the pipelines 37a, 37b and 24a, 24b communicate with each other.

The solenoid valves 22a and 22b and the switching valves 23a and 23b are switched
If 21a, 21b and 37a, 37b as well as 24a, 24b communicate with each other, the hydraulic pressure from the hydraulic pump 20 will be the casing 15a of the automatic brake cylinders 17a, 17b via the conduits 21a, 21b, 37a, 37b, 24a, 24b. , 1
5b head side oil chamber 25a, 25b is introduced, piston rod 1
8a, 18b overcome the effectiveness of the springs 19a, 19b to move forward,
Therefore, the forces of the springs 19a and 19b do not act on the links 6a and 6b, and the automatic brake cylinders 17a and 17b are brought into a released state.

When braking the main winding winch 1a and the auxiliary winding winch 1b during work, the operator depresses the brake pedals 7a and 7b. Therefore, in FIG. 2, the links 9a and 9b overcome the force of the springs 8a and 8b and rotate clockwise, and the link 11
a, 11b are pushed to the left, the links 13a, 13b rotate counterclockwise, the links 14a, 14b are pulled to the right, the links 6a,
6b rotates counterclockwise to pull the brake bands 3a, 3b, and the main winding winch 1a via the brake drums 2a, 2b.
The auxiliary winding winch 1b is braked. When the links 6a, 6b rotate counterclockwise, the pin 33 fixed to the links 6a, 6b
Since a and 33b slide on the long holes 34a and 34b at the tips of the piston rods 18a and 18b, the automatic brake cylinders 17a and 17b do not receive force from the links 6a and 6b.

When the brake pedals 7a, 7b are released, the springs 8a, 8b rotate the links 9a, 9b counterclockwise, and the links 11a, 11b are not acted on by the springs 19a, 19b. Links 11a and 11b are pulled to the right, and link 1
3a and 13b rotate clockwise, the links 14a and 14b are pushed leftward, and the links 6a and 6b rotate clockwise, so that the brake bands 3a and 3b are loosened and the main winch 1a and auxiliary winding Braking of winch 1b is released.

When the automatic brake cylinders 17a, 17b are switched to automatically brake the brake drums 2a, 2b of the main winding winch 1a and the auxiliary winding winch 1b, the pilot pipelines 28a, 28b
Automatic brake switch 30
Turn off a, 30b. Then, the solenoid valves 22a, 22b are switched by the springs 35a, 35b, the pipelines 37a, 37b communicate with the oil tank 32, and the oil pressure in the head side oil chambers 25a, 25b of the automatic brake cylinders 17a, 17b is transferred to the oil tank 32. The piston rods 18a, 18b are retracted by the springs 19a, 19b, and the links 6a, 6b are rotated counterclockwise, so that the brake bands 3a, 3b are pulled and the main winding winch 1a is pulled through the brake drums 2a, 2b. , The auxiliary winding winch 1b is automatically braked.

If the automatic brake switches 30a and 30b are turned on again and the solenoid valves 22a and 22b are excited and switched, the hydraulic pump 2
The hydraulic pressure from 0 acts on the head side oil chambers 25a, 25b of the automatic brake cylinders 17a, 17b, and the piston rods 18a, 18b move forward to rotate the links 6a, 6b clockwise, and the brake bands 3a, 3b. Loosen main winch 1a, auxiliary winch 1
Braking of b is released.

With the conduits 21a, 21b and 37a, 37b communicating, the remote control valve 26
By operating a, 26b and adjusting the hydraulic pressure introduced into the pilot lines 28a, 28b as appropriate, the opening of the switching valves 23a, 23b is adjusted, whereby the braking force of the automatic brake cylinders 17a, 17b is adjusted appropriately. Adjusted.

[Problems to be Solved by the Invention] However, the main winding winch 1a and the auxiliary winding winch 1b described above are provided.
Then, depending on the content of the work, both the main winding winch 1a and the auxiliary winding winch 1b are simultaneously switched from braking by stepping on the brake pedals 7a, 7b to automatic braking, or automatic braking is changed to brake pedals 7a, 7b. It may be necessary to switch to braking by stepping on
And "automatic" switching, automatic brake switch 30a, 30b
Since both of them must be turned on and off, there is a problem that the operation becomes complicated when the automatic brake switches 30a and 30b are frequently switched.

In view of such circumstances, the present invention has an object to enable simultaneous operation of switching "stepping" and "automatic" of a main winding winch and an auxiliary winding winch by operating one automatic brake switch. Is.

[Means for Solving the Problems] The present invention relates to brake bands 3a and 3b wound around brake drums 2a and 2b of a main winding winch 1a and an auxiliary winding winch 1b,
When hydraulic pressure is introduced, loosen the brake bands 3a, 3b,
When the hydraulic pressure is released, the built-in elastic-repellent bodies 19a, 19b can apply tension to the brake bands 3a, 3b, and the automatic brake cylinders 17a, 17b and the automatic brake cylinder 1
Between the brake pedals 7a and 7b, which can apply tension to the brake bands 3a and 3b by depressing when the hydraulic pressure is applied to 7a and 17b, between the hydraulic pump 20 and the automatic brake cylinders 17a and 17b. Connected in series to the hydraulic pump 2
The hydraulic pressure from 0 is introduced to the automatic brake cylinders 17a, 17b, or the hydraulic pressure of the automatic brake cylinders 17a, 17b is changed to the tank 3
The solenoid valves 22a, 22b and the switching valves 23a, 23b that can be released to 2 and the electric circuits 38a, 38b connected in parallel from the power source 29 to the solenoid valves 22a, 22b are connected and turned on. The solenoid valves 22a, 22b are excited so that the hydraulic pressure from the hydraulic pump 20 is transferred to the automatic brake cylinders 17a, 17b so that the solenoid valves 22a, 22b are switched off so that the solenoid valves 22a, 22b are de-energized. Then, the hydraulic pressure from the hydraulic pump 20 is automatically brake cylinders 17a, 17
Automatic brake switches 30a and 30b that switch solenoid valves 22a and 22b so that they do not reach the b side, and pilot lines 28a and 28b
Is introduced into the automatic brake cylinders 17a, 17b so that the hydraulic pressure from the hydraulic pump 20 is transmitted to the automatic brake cylinders 17a, 17b, the switching valves 23a, 23b are switched to release the hydraulic pressure in the pilot lines 28a, 28b. In the brake device in the winch device provided with the remote control valves 26a, 26b for switching the switching valves 23a, 23b so that the hydraulic pressure from 20 is not transmitted to the automatic brake cylinders 17a, 17b side, in the automatic circuit of the electric circuits 38a and 38b. From the brake switch 30a, 30b to the solenoid valve 22a, 22b,
They are connected by an electric circuit 39 equipped with a changeover switch 40.

[Operation] When the automatic brake cylinders 17a, 17b are switched so that the main winding winch 1a and the auxiliary winding winch 1b are individually braked, the changeover switch 40 is turned off and the automatic brake switches 30a, 30b are individually separated. Turn on and off.

When switching the automatic brake cylinders 17a, 17b so that braking is performed by stepping on the brake pedals 7a, 7b, turn on the automatic brake switches 30a, 30b and turn on the solenoid valve 22.
a and 22b are excited and switched, and by operating remote control valves 26a and 26b, switching valves 23a and 2b are operated by hydraulic pressure from pilot lines 28a and 28b.
When 3b is switched, the hydraulic pressure from the hydraulic pump 20 is introduced into the automatic brake cylinders 17a, 17b, and the brake bands 3a, 3b are loosened.

Therefore, by depressing or releasing the brake pedals 7a, 7b, tension is applied to the brake bands 3a, 3b to brake the brake drums 2a, 2b, or the brake bands 3a, 3b are loosened to brake. Drumm 2a,
Braking of 2b is released.

Also, when switching the automatic brake cylinders 17a, 17b so as to automatically brake without stepping on the brake pedals 7a, 7b, with the hydraulic pressure applied to the pilot lines 28a, 28b,
Turn off the automatic brake switches 30a and 30b. As a result, the solenoid valves 22a, 22b are switched so that the automatic brake cylinders 17a, 17b communicate with the tank 32, the hydraulic pressure of the automatic brake cylinders 17a, 17b is released to the tank 32, and the elastic body 19a, 1b is released.
Tension is applied to the brake bands 3a, 3b by the force of 9b,
The brake drums 2a and 2b are automatically braked. When the automatic brake switches 30a and 30b are turned on, the braking is released again. By operating the remote control valves 26a, 26b in this state and adjusting the liquid pressure introduced into the pilot conduits 28a, 28b,
The openings of the switching valves 23a, 23b are adjusted, and the braking force of the automatic brake cylinders 17a, 17b is adjusted accordingly.

Brake pedals 7a, 7 for main winding winch 1a and auxiliary winding winch 1b
When switching to braking by stepping on b or braking by the remote control valves 26a, 26b is performed at the same time, the remote control valves 26a, 26b
Operate b, turn on the changeover switch 40 in a state of introducing the hydraulic pressure into the pilot lines 28a, 28b and changing over the changeover valves 23a, 23b, and turn off either one of the automatic brake switches 30a or 30b, The other automatic brake switch 30b or 30a is turned on or off. That is, when the automatic brake switch 30b or 30a is turned on, the solenoid valves 22a, 22a
b is switched at the same time, and the hydraulic pressure of the hydraulic pump 20 is introduced into the automatic brake cylinders 17a, 17b and the brake bands 3a, 3b.
Loosens and the braking is released. Therefore, the brake pedals 7a, 7
Braking by stepping on b is possible.

Also, with the hydraulic pressure introduced into the pilot pipe lines 28a, 28b,
When the automatic brake switch 30b or 30a is turned off, the solenoid valves 22a and 22b are simultaneously switched, and the hydraulic pressure of the automatic brake cylinders 17a and 17b is transferred from the solenoid valves 22a and 22b to the tank.
In order to escape to 32, the brake band 3 by the elastic body 19a, 19b
Tension is applied to a and 3b, and the brake drums 2a and 2b are braked automatically and simultaneously.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

The basic configuration of this embodiment is the same as that of the conventional device shown in FIG. 2, but in the present embodiment shown in FIG. 1, the automatic brake switches 30a and 30b are arranged in parallel on the downstream side of the current flow direction D. The cables 38a and 38b are connected by a cable 39, and a changeover switch 40 is provided in the middle of the cable 39.

Next, the operation of this embodiment will be described.

When the main winding winch 1a and the auxiliary winding winch 1b are separately switched between braking by stepping on the brake pedals 7a, 7b and automatic braking, the changeover switch 40 is turned off and the second
Automatic brake switch 30 as described for the conventional device in the figure
Since it is sufficient to turn on and off the a and 30b separately, a description thereof will be omitted.

When simultaneously switching both the main winding winch 1a and the auxiliary winding winch 1b between braking by stepping on the brake pedals 7a, 7b and automatic braking, turn on the changeover switch 40 and select either of the automatic brake switches 30a, 30b. Is turned off, and another automatic brake switch 30b or 30a is turned on or off.

When switching the main winding winch 1a and auxiliary winding winch 1b to braking by stepping on the brake pedals 7a, 7b at the same time, operate the remote control valves 26a, 26b to apply hydraulic pressure from the main pump to the pilot lines 28a, 28b. Switch valves 23a and 23b to line 3
7a, 37b and 24a, 24b have been switched to a state of communication, for example, switch 40 is turned on, automatic brake switch 30
Turn off b and turn on the automatic brake switch 30a.
Then, the current from the power supply 29 will be the automatic brake switch.
The solenoid valve 22a is energized from 30a and the automatic brake switch 30a and the changeover switch 40 is energized to the solenoid valve 22b. The solenoid valves 22a and 22b are simultaneously switched so that the conduits 21a and 21b and the conduits 37a and 37b communicate with each other. . For this reason pipeline 21a,
21b, 37, 37b, 24a, 24b communicate with each other, and the oil from the hydraulic pump 20 is head side oil chambers 25a, 25b of the automatic brake cylinders 17a, 17b.
, The piston rods 18a, 18b move forward, and the links 6a,
Since 6b rotates clockwise and the brake bands 3a and 3b loosen, braking of the main winding winch 1a and the auxiliary winding winch 1b is released. Therefore, the main winding winch 1a and the auxiliary winding winch 1b are braked by stepping on the brake pedals 7a and 7b, and the braking is released by releasing the foot from the brake pedals 7a and 7b.

When the main winding winch 1a and the auxiliary winding winch 1b are simultaneously switched to automatic braking, the remote control valves 26a and 26b are operated and the hydraulic pressure from the main pump is applied to the pilot conduits 28a and 28b to switch the switching valve 23a. , 23b are switched so that the pipelines 37a, 37b and 24a, 24b communicate with each other, and in this state, the automatic brake switch
Turn off 30a and 30b. Therefore, the solenoid valves 22a, 22b
Is de-energized and switched, and the lines 37a and 37b are connected to the oil tank 32.
The hydraulic pressure in the head side oil chambers 25a, 25b of the automatic brake cylinders 17a, 17b escapes to the oil tank 32 and the springs 19a, 1
Piston rods 18a and 18b retract due to 9b, and links 6a and 6b
Rotates counterclockwise to pull the brake bands 3a, 3b and automatically move the brake drums 2a, 2b.

When releasing the automatic braking of the main winding winch 1a and the auxiliary winding winch 1b, as described above, the pilot conduits 28a, 28b
Hydraulic pressure to actuate the switching valves 23a, 23b to the conduits 37a, 37b and 24a,
With the switch 24b still connected, the automatic brake switch 30a is turned on again to connect the conduits 21a, 21b to 37a, 37b, and the hydraulic pressure of the hydraulic pump 20 is changed to the automatic brake cylinder 17a,
It is introduced into the head side oil chamber 25a, 25b of 17b.

In this way, when the main winding winch 1a and the auxiliary winding winch 1b are simultaneously switched to the braking by stepping on the brake pedals 7a and 7b or the automatic braking, the automatic brake switch 30
Since only one of a and 30b needs to be turned on and off, the operation at the time of such switching becomes easy.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Advantage of the Invention] According to the brake device in the winch device of the present invention,
When the main winding winch 1a and the auxiliary winding winch 1b are simultaneously braked by stepping on the brake pedals 7a, 7b or switched to automatic braking, it is sufficient to switch only one of the automatic brake switches 30a, 30b. Therefore, it is possible to obtain various excellent effects such that the operator is not overloaded and the safety management is preferable.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram of an example of a conventional device. In the figure, 1a is a main winding winch, 1b is an auxiliary winding winch, 2a and 2b are brake drums, 3a and 3b are brake bands, 7a and 7b are brake pedals, 17a and 17b are automatic brake cylinders, and 19a and 19b are springs (balls). (Repellent body), 20 is a hydraulic pump (hydraulic pump), 22a and 22b are solenoid valves, 23a and 23b are switching valves, 26a,
26b is a remote control valve, 28a and 28b are pilot lines, 29 is a power supply, 30a and 30b are automatic brake switches, 32 is an oil tank (tank), 38a, 38b and 39 are cables (electric circuit), and 40 is a changeover switch Indicates.

Claims (1)

[Scope of utility model registration request] 1. A brake band 3a, 3b wound around brake drums 2a, 2b of a main winding winch 1a and an auxiliary winding winch 1b.
When the hydraulic pressure is introduced, the brake bands 3a and 3b are loosened, and when the hydraulic pressure is released, the built-in elastic / repellent bodies 19a and 19b can apply tension to the brake bands 3a and 3b. 17a, 17b, and brake pedals 7a, 7b that can apply tension to the brake bands 3a, 3b by depressing when hydraulic pressure is applied to the automatic brake cylinders 17a, 17b, and a hydraulic pump 20. The automatic brake cylinders 17a, 17b are connected in series between the automatic brake cylinders 17a, 17b, and the hydraulic pressure from the hydraulic pump 20 is applied to the automatic brake cylinders 17a, 17b.
Solenoid valves 22a, 22b introduced into b or adapted to release the hydraulic pressure of the automatic brake cylinders 17a, 17b to the tank 32
And the switching valves 23a and 23b and the power source 29 to the solenoid valves 22a and 22b.
Are connected in parallel to the electric circuits 38a, 38b and turned on to excite the solenoid valves 22a, 22b so that the hydraulic pressure from the hydraulic pump 20 causes the automatic brake cylinder 17 to operate.
By switching off the solenoid valves 22a and 22b so that they are transmitted to the a and 17b sides, the excitation of the solenoid valves 22a and 22b is released and the hydraulic pressure from the hydraulic pump 20 is automatically braked.
Automatic brake switches 30a, 30b that switch solenoid valves 22a, 22b so that they do not reach the 17a, 17b side, and pilot line 2
The switching valve 23 so that the hydraulic pressure from the hydraulic pump 20 is transmitted to the automatic brake cylinders 17a, 17b by introducing the hydraulic pressure to 8a, 28b.
a, 23b is switched and the hydraulic pressure in the pilot lines 28a, 28b is released so that the hydraulic pressure from the hydraulic pump 20 is changed to the automatic brake cylinders 17a, 17b.
In the brake device in the winch device provided with the remote control valves 26a, 26b for switching the switching valves 23a, 23b so as not to be transmitted to the b side, the solenoid valves 22a, 22b from the automatic brake switches 30a, 30b of the electric circuits 38a and 38b. The brake device in the winch device, wherein the parts up to are connected by an electric circuit 39 having a changeover switch 40.