JPH0511468Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology is for the discharge of a gate plate for opening and closing a discharge port having a known toggle lock device, which is often used for opening and closing the discharge port of a hopper such as a pool hopper of a combination weighing device. It belongs to the field of structural technology for locking devices when the exit is blocked.

<Summary of the gist> This invention relates to a lock device in which the discharge port opening/closing operation link of the hopper toggle lock device has a gate plate to close the discharge port. A lock bar is attached to the toggle device that automatically engages the free rotation edge of the gate plate to prevent rotation of the gate plate when the discharge port is closed. This invention relates to a locking device for a gate plate for opening and closing a hopper's discharge port, which prevents leakage of articles by preventing a gap from forming between the gate plate and the discharge port due to the load of the product or the impact of loading the product.

<Prior art> Conventionally, for example, an opening/closing gate plate has been used to open and close the discharge port of a hopper such as a pool hopper or a weighing hopper of a combination weighing device. In some cases, a toggle lock device is often used to prevent the door from opening.

<Problems to be solved by the invention> However, in this type of toggle lock device, the discharge port opens when the gate plate that closes the lower end of the discharge port is moved downward. Even if the equipment is precisely manufactured as designed, if the pivot parts wear out over time due to repeated use over a long period of time, even if the discharge port is blocked, the material inside the hopper may become clogged. If a large amount of easily flowing items such as granular products are stored in the container, the load of the products and the impact when the products are inserted may cause a small gap between the gate plate and the outlet, causing the products to flow. There is a drawback that there is a risk of leakage, and there is also the drawback that the work environment is deteriorated by scattering into the mechanical part of the equipment, and the smooth operation of the operating mechanism part is hindered.

The purpose of this invention is to solve the technical problem of closing the gate plate for opening and closing the hopper based on the above-mentioned conventional technology, and to automatically double lock the gate plate at the same time as closing the outlet of the hopper. to ensure that the downward rotation of the gate plate is prevented,
We provide an excellent locking device for the gate plate for opening and closing the discharge port of a hopper, which is useful for the application of article transfer technology in various industries and prevents the leakage of granular and other processed materials even after repeated use over a long period of time. That is.

<Means/effects for solving the problems> In accordance with the above-mentioned purpose, the structure of this invention, which is summarized in the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems by providing an opening/closing link of the toggle lock device or When the gate plate forcibly closes the discharge port due to the return spring, a lock bar integrally fixed to the link automatically engages the free end of the gate plate to prevent downward rotation of the gate plate. At the same time, the toggle acts to double lock the gate plate, and during the minute period during which the lock bar does not come off from the free end of the gate plate when the link performs the forced opening action, the minute movement of the toggle is caused by the minute movement of the mechanism. The toggle is released and the gate plate opens only when the lock bar comes off from the gate plate, and the toggle lock device is used repeatedly for a long period of time and the various parts have play due to wear etc. Even if a problem occurs between the gate plate and the discharge port,
Technical measures have been taken to prevent the formation of gaps and the leakage of granular products.

<Embodiment Configuration> Next, one embodiment of this invention will be described below based on the drawings.

The illustrated embodiment is an embodiment of a pool hopper of a combination measuring device for seasonings, etc., in which a predetermined number of heads are arranged circumferentially. At the rear end of the upper part (left end in Figure 1), long support arms 2, 2 facing forward and a short support metal fitting 3 are symmetrically fixed and can be detachably attached to the device frame via a lock (not shown). Each support arm 2
A rotation shaft 4 facing in the left-right direction is pivotally installed at the front end of the rotating shaft 4, and a first link 5 facing rearward is fixed to one end of the pivot shaft 4. At the upper end of 5', there is a roller 6 for opening/closing operation.
is pivotally installed and faces the advancing/retracting fork of the opening/closing mechanism (not shown).

Further, at the rear end of the first link 5, there is a second link pointing upward.
The link 7 is pivotally connected by a first floating pin 8, its rear end faces in the vertical direction, its center is connected to the front end of the support metal fitting 3, and the upper end of the rotating link 10, which is pivotally supported by a fixed pin 9, is connected to a second It is pivotally supported by a floating pin 11.

A right rotation link 1 having the same shape as the lower part of the left rotation link 10 is also attached to the support fitting 3 on the right side in the figure.
2 is pivotally supported by a stationary pin 13, and the lower ends of both the left and right links 10 and 12 are connected via a retainer 14, and the upper surface of the retainer 14 is provided to close the opening of the lower discharge port. Gate plate 15
When the rear part is mounted and fixed and the discharge port is closed, the rotation shaft 4, the first floating pin 8, and the second
The floating pins 11 are arranged in a straight line.

A tension spring 16 is tensioned between the lower end of the hanging piece 2' connected to the center of each support arm 2 and the lower end of the hanging piece 5'' embedded in the front end of the first link 5. The first link 5 is biased clockwise in the figure to return the gate plate 15 to the opening and close it.

In the closed state shown in FIG. 1, the tip 17' of the lock bar 17 underhangs and seals the tip of the gate plate 15, and the rotation shaft 4 and the pins 8, 11 are aligned in a straight line, forming a toggle device. .

In addition, 18 is a holding metal fitting, and 19 is a fixing bolt.

<Example: Effect> In the above-mentioned lock device, when the combination metering device is put into operation and seasoning powder is supplied from the upper part from the radiant trough to the input port 1, as shown in FIG. When the fork of the drive mechanism (not shown) pushes and rotates the operating roller 6 in the direction of the arrow, the first link 5 rotates in the same direction about the rotation shaft 4, and the first floating pin 8 Rotate in the direction of the arrow,
The second floating pin 11 moves forward (rightward in the figure) around the stationary pin 9, and the rotating link 10 rotates clockwise around the stationary pin 9, and the gate plate 1
5 rotates in the direction of the arrow as shown by the imaginary line in FIG. 1, and the discharge port opens.

Seasoning (not shown) is discharged from the opened discharge port and thrown into a lower measuring hopper (not shown), and a fork (not shown) is retreated by the drive mechanism, and the spring 1
6, the first link 5 and the roller 6 return in the direction opposite to the arrow, each member moves in the opposite direction to the above process, the gate plate 15 closes the opening, and the lock bar 17 closes. Tip 1
7' underhangs the tip of the gate plate 15 to seal it.

The above process is basically the same logical operation as the configuration of the conventional toggle lock device, but in this invention, the first As shown in the figure, a rotatable lock bar 17 is fixedly installed, and a hook 17' bent toward the opening is formed at the lower end of the lock bar 17, so that when the gate plate 15 closes the discharge port, the lock bar 17 is fixedly installed. The lower side of the front end of the gate plate 15 is engaged and locked.

Therefore, the toggle lock device prevents the rotation shaft 4 and both floating pins from rotating even if the gate 15 attempts to rotate in the direction of the arrow due to the load of a large amount of articles in the hopper or the impact of loading articles when the discharge port is closed. Since 8 and 11 are lined up in a straight line, the second floating pin 11 cannot move forward, and therefore the rotation link 10 cannot rotate clockwise, so that the The outlet is designed to prevent it from opening.

However, due to long-term repeated effects,
When each of the above-mentioned pivot joints and the pivot joint of the immovable pin 9 wear out and play occurs, play occurs, and the gate plate 15 rotates slightly due to the above-mentioned load and impact, causing a gap between it and the discharge port. If the product stored in the pool hopper is a product that easily flows, such as fine powder or granular seasoning, it will leak from the small opening clearance of the gate plate 15.

This phenomenon occurs because the rear part of the gate plate 15 is supported by both rotation links 10 and 12.
Significant at the anterior end of 5. In such a case, weighing troubles may occur particularly in the weighing hopper, and the smooth operation of peripheral mechanisms may be hindered.

However, as shown in FIG.
7' automatically engages in an underhung manner with the front end of the gate plate 15 that closes the discharge port 1, so even if there is play in each pivot joint, the gate plate 15 will not rotate due to load or impact. There is no slight gap between the discharge port 1 and the discharge port 1.

The above-described toggle lock device operates by moving the operation roller 6 to open the closed discharge port as shown in
When the lock bar 17 is slightly rotated in the direction of the arrow by a driving fork (not shown) until the hook 17' of the lock bar 17 comes off the front end of the gate plate 15, the first floating pin 8 is rotated in the direction of the arrow to the position of point P. , the second link 7 also rotates together, but when the discharge port is closed, the rotation shaft 4 and both the first and second floating pins 8, 1
1 moves from being lined up in a straight line, the amount of forward displacement of the second floating pin 11 is
The amount of displacement of gate plate 1 is extremely small compared to the amount of displacement of
5 does not substantially rotate, but gradually begins to rotate after the hook 17' is completely removed from the gate plate 15, so that the discharge port can be opened smoothly.

Further, when closing the discharge port, each member operates in the opposite manner to the above process, and when the hook 17' approaches the front end of the gate plate 15, the gate plate 15 comes into contact with the lower end of the discharge port. Therefore, the hook 17' smoothly engages with the front end of the gate plate 15.

Therefore, if the end edge of the hook 17' is inclined rearward and downward in an underhang shape as shown in the figure, it can be used smoothly for a long period of time.

It goes without saying that the embodiment of this invention is not limited to the above-described embodiment, and various embodiments may be adopted, such as applying Teflon (trademark) treatment to the end hook of the lock bar. It is also possible to apply the present invention to a weighing hopper, and it goes without saying that it can also be applied to a hopper of an automatic weighing device other than a combination weighing device.

<Effects of the Invention> According to this invention, when the toggle lock device of the hopper is operated in substantially the same way as the conventional toggle lock device to close the discharge port by using the gate plate, the hook of the lock bar engages with the front end of the gate plate, preventing even the slightest rotation of the gate plate.
When used in packing centers such as supermarkets, factories, and warehouses that handle large amounts of powders and granular materials that tend to flow, there is little leakage of handled goods and the surrounding area is not soiled.

Moreover, the configuration is extremely simple and there is no risk of failure.
This has the advantage that it can be attached to the conventional toggle lock device in use.

By providing a lock bar that engages with the tip of the opening/closing gate plate on the rotating shaft of one link of the toggle device, the pin pivot between the first link and the second link of the toggle device can be used repeatedly. Even if looseness occurs over time, the second
Substantially minute movement of the gate plate connected to the link is absorbed by the play, so even if the opening/closing gate is blocking the discharge opening of the hopper, it opens slightly and removes granules and powder. Even if the stored product to be processed tries to leak out from the hopper opening, the locking of the lock bar provides an excellent effect of preventing the powdered or granular product from leaking out.

In this way, the locking of the opening/closing gate to the hopper is doubled, which provides an excellent effect of ensuring that the gate plate remains closed to the discharge port even during long-term use.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, in which Fig. 1 is a side view of a toggle lock device, Fig. 2 is a plan view thereof, Fig. 3 is a side view, and Fig. 4 is a toggle lock device to which this invention is applied. FIG. 4... Rotation axis, 5... First link, 7... Second
Link, 10... Rotating link, 15... Gate plate, 17... Lock bar.

Claims (1)

[Scope of utility model registration request] In a locking device for an opening/closing gate plate provided at the discharge port of the hopper and having a toggle device attached to the opening/closing link, a locking device is provided on the rotation axis of the opening/closing link that rotates in a direction opposite to the rotational direction of the opening/closing gate plate. A locking device for a gate plate for opening and closing a discharge port of a hopper, comprising a lock bar that engages with a rotatable free end of the gate plate while the gate plate closes the discharge port of the hopper.