JPS5828009Y2 - Automatic dust remover rake protection device - Google Patents

Description

[Detailed description of the invention] This invention is a chain-type automatic dust remover that scrapes up dust, etc. captured on a screen installed in a waterway, so that even if a large amount of sediment accumulates at the bottom of the upstream side of the screen, the rake will not be damaged. This invention relates to a protection device for a rake that allows the rake to operate without any problems.

In a chain-type automatic dust remover, a rake is provided in the chains 7 which are placed vertically opposite each other on the upstream side of the screen, and the rake is raised and lowered and opened and closed by driving this chain 7.
This scrapes up and removes the dust captured by the screen.

Therefore, in this type of dust remover, even if a large amount of sediment accumulates at the lower part of the upstream side of the screen, the rake is raised and lowered and opened and closed at a constant rate, so the rake cannot turn at the lower part of the screen, which may cause the operation to stop or malfunction. Also, the same result will occur if foreign matter gets caught between the rake and the screen surface.

Up until now, this type of dust remover has been designed with a mechanism that uses a spring to press the rake against the screen surface in case foreign matter gets caught between the rake and the screen. If the rake is pressed against the screen by the force of the spring, the spring may be damaged due to overload, or foreign objects may become caught between the springs. It had the drawback of becoming inoperable.

In order to prevent this, Japanese Patent Laid-Open No. 54-44331 discloses a structure in which a rake is provided at the lower part of a bogie that is raised and lowered in a pin rack manner via a link mechanism.

However, even if foreign objects can be prevented from getting caught, with this link type, the link tends to protrude upward in front of the screen, and if machinery such as a sand raking machine is installed in front of the screen, , rakes and other machinery may be damaged.

The present invention uses a weight to press the rake toward the screen without lifting the rake from the screen surface in any case such as foreign matter getting caught or sediment accumulation, and the rake is moved vertically relative to the rake support. This device is designed to allow the driver to continue driving while protecting the rake by sliding the rake in the opposite direction.This will be explained below based on an example.

In the figure, S is a screen installed in the waterway, and a rake L is raised and lowered and opened and closed along this screen S to scrape up and remove the debris captured by the screen.
A pair of left and right endless chains are stretched between sprocket wheels 1 and 1 facing each other at the upper and lower parts of a waterway along a screen S and perpendicular to the screen.

Further, a pair of left and right rake guides G are provided parallel to the screen S to guide the running of the rake support 4. The rake guide G is provided with a guide rail 3. , rollers guided by guide rails 3 are provided.

A shaft 5 is provided protruding from this rake support base 4, and a boss 7 is provided on this shaft 5.
is provided to be swingable, that is, to be freely rotatable about a shaft 5, and one end of a rake arm 6 having a rake L at its tip is slidably inserted into and supported by the locking boss 7.

A way (W) having a desired weight is provided at a part of the rake arm 6, that is, at a position where a pressing force is applied to the screen surface when the rake is raised.

The weight of this weight W is adjusted by the rake pressing force, which is set in advance.

Further, an arm 8 is protrudingly provided on the shaft 5 of the rake support base 4 so as to be close to the boss 7 and pivotably attached thereto.
One end of this arm 8 is locked to a part of the chino 2, and the rake support base is raised and lowered by driving the chino 2.

Further, the boss 7 is placed in contact with a part of this arm 8.
A stopper 9 is provided protruding from the boss, and by abutting the stopper 9 fixed on the boss against the arm 8, the rake at the tip of the rake arm swings about the shaft 5 by its own weight and presses against the screen surface. However, at this time, the maximum pressing force of the rake on the screen surface is adjusted by adjusting the distance between the stopper and the arm.

When the rake is lowered, the tip of the arm is pivoted to the screen side of the chino, as shown by the chain line in FIG. 4, and the arm 8 swings toward the screen S using the shaft 5 as a fulcrum. As a result, the boss 7 swings about the shaft 5 via the stopper 9 that is in contact with the arm, and the rake arm 6 is held at a predetermined distance from the screen S. .

The above-mentioned rake support stands 4 are arranged one on each side of the screen, and a shaft 5 is horizontally mounted between the two rake support stands 4, 4, and an integrated weight support shaft 11 is installed between the opposing rake arms. horizontally and adjust the adjustment to this shaft 11)
W shall be installed.

In the dust remover constructed as described above, when the chino 2 disposed along the screen surface is driven, the rake L is separated from the screen S along the rake guide G as shown by the chain line in Fig. 4. It comes down in an open state.

When the lowest position is reached, the rake arm 6 swings around the shaft 5 as a fulcrum when the shaft 12, which is the pivot point between the rake and the chino, rotates along the lower sprocket wheel 1 due to the drive of the chino. The rake L contacts the screen S surface and closes.

In this case, if there is no sediment deposited at the bottom of the screen, the tip of the rake will smoothly contact the bottom of the screen S due to the weight of the weight, and the rake will be pressed into contact with the screen surface with the desired pressure by driving the chino. At this time, if sand has accumulated, a push-up blade acts on the tip of the rake during the initial rotation of the rake due to the rotation of the chino, and as a result, the rake arm 6 The rake arm is supported by the shaft 5 by sliding on the boss 7 on which one end is supported, releasing the overload applied to the rake, and overcoming the pressing force of the weight against the force in the opposite direction to the pressing force of the rake. The boss is rotated to relieve the overload of the rake, and the rake is protected in both cases.

According to the present invention, the pressure of the rake on the screen surface is performed by the weight of the weight added to the swinging rake arm, and since this rake arm is slidably supported by the boss, the pressing force of the rake can be adjusted arbitrarily. In addition to being easy to adjust, it also prevents foreign matter from getting caught in the rake, preventing it from becoming inoperable.Even if the rake is overloaded, the rake arm can be slid vertically relative to the rake support. It has the advantage of being able to release overload and protect the rake through movement and rocking.

[Brief explanation of the drawings] Fig. 1 is a front view showing the entire automatic dust remover, Fig. 2 is a side view, Fig. 3 is an enlarged view showing the main parts of Fig. 1, and Fig. 4 is an enlarged view of the rake section. An enlarged front view, FIG. 5 is a side view of FIG. 4. 1... Sprocket wheel, 2...
Cheno, 3... Guide rail, 4...
Rake support base, 5... shaft, 6... rake arm, 7... boss, 8... arm, 9... stopper, 11 .12...
Axis, W...Weight, S...Screen, L...Rake, G...Rake guide.

Claims (1)

[Scope of utility model registration request] A pair of left and right driving ches 7 are stretched endlessly along the screen and at right angles to the screen, and a pair of left and right rakes for running the rake support is provided with an id along the screen. The stand is provided with a shaft that rotatably supports the other end of the arm that is latched to the check 7, and a rake arm with a rake fixed to the lower end is attached to the rake support stand, and the check 7 is rotated. In the automatic dust remover, the rake arm is slidably inserted into a boss that is swingably supported on a rake support base, and the rake arm is slidably inserted into a boss that is swingably supported on a rake support base.
The automatic dust remover is equipped with a weight that urges the rake against the screen surface, and a stopper that faces the arm and is pressed by the swinging of the arm to separate the rake from the screen surface. rake protection device.