JPH0219296A - Hopper gate opening and closing apparatus - Google Patents

Abstract

PURPOSE:To contrive the reduction of the clearance between a discharging opening and gates by installing rails near a discharging opening of a hopper and parallel to the opening plane thereof, providing the gate with wheels rolling on a rail and supporting the gate on the hopper, so that it can freely move on the rail parallel to the opening plane of the discharging opening. CONSTITUTION:The rails 4 are provided slightly above a discharging opening 3 at each side of a hopper 2 parallel to an opening plane thereof. The gates 6 for opening and closing the discharging opening 3 are formed into a U-shape and each gate is fitted with three wheels 7 on each side. The wheels 7 of not less than two provided on each side are sufficient and these wheels are so shaped as to conform with the shape of the rail 4 for guidance thereby. The gate 6 is supported by the hopper 2 with the wheels 7 set on the rail 4 and freely movable thereon parallel to the opening plane of the discharging opening 3. Therefore, there is no need for widening a clearance B between the discharging opening 3 and the gate 6 to maintain the movement zone of the gate 6 and the clearance can be reduced to such degree as to allow a contact sliding therebetween, thereby effectively preventing the outflow of earth and sand.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hopper gate opening/closing device.

More specifically, the present invention relates to an improvement in the structure of a hopper gate opening/closing device in the opening/closing direction.

[Prior Art] As a conventional hopper gate opening/closing device, for example, the one shown in Fig. 8,
The one shown in FIG. 9 is known.

This conventional hopper gate opening/closing device is for earth and sand, and the hopper body is supported at a high place by supporting legs a so that transport vehicles such as trucks can enter downward.The upper part is cylindrical and the lower part is tapered. A discharge port C with a horizontal opening surface is opened at the bottom of the hopper body formed in the shape, and the upper part of the gate d which opens and closes this discharge port C is supported by the shaft e of the hopper body, and the gate d An air cylinder f for opening and closing is interposed between the hopper main body 61 and the gate d.

[Problems to be Solved by the Invention] In the conventional hopper gate opening/closing device described above, since the gate d opens and closes on a circular arc trajectory A centered on the pongee e as shown in FIG. The gap B between C and the gate d must be formed wide to ensure the movement range of the gate d. Therefore, there is a problem in that the earth and sand contained in the hopper body flows out from the gap B when the gate d is closed.

Further, since the opening/closing movement of the gate d on the arcuate trajectory A is in a direction halfway opposite to the direction of the weight pressure P of the earth and sand, there is also the problem that a large driving force is required to open the gate d.

The present invention was made to solve these problems, and its purpose is to provide a hopper gate opening/closing device that has a narrow gap between the discharge port and the gate and can open the gate with a small driving force. It is about providing.

Means for Solving Problem J In order to achieve the above-mentioned object, the hopper gate opening/closing device according to the present invention includes a hopper body supporting a gate for opening and closing a discharge port opened at the bottom of the hopper body. In a hopper gate opening/closing device in which a drive mechanism for opening and closing the gate d is connected to the gate, a rail is installed near the discharge port of the hopper body parallel to the opening surface of the discharge port, and
The present invention employs a means characterized in that a wheel mounted on the rail is attached to the gate, and the gate is supported on the hopper body so as to be able to run freely in a direction parallel to the opening surface of the discharge port.

[Operation] According to the above-mentioned means, since the gate moves parallel to the opening surface of the discharge port, there is no need to form a wide gap between the discharge port and the gate in order to secure the movement range of the gate. , the purpose of narrowing the gate gap is achieved.

In addition, since the gate, which moves parallel to the opening surface of the discharge port, travels in an almost horizontal direction using wheels and rails, it moves without facing the weight pressure of the contents in the hopper body.
Since the movement resistance is also reduced, the purpose of opening the gate with a small driving force is achieved.

Embodiments] Hereinafter, embodiments of a hopper gate opening/closing device according to the present invention will be described with reference to FIGS. 1 to 7.

This embodiment shows a hopper for earth and sand, which is constructed by assembling parts welded and fixed with iron plates, iron frames, etc. by tightening, etc., and the structures related to the supporting legs 1 and the hopper body 2 are the same as those of the conventional example. ing.

The discharge port 3 of this embodiment is opened at the bottom of the hopper main body 2 as in the conventional example, but the opening surface has a two-sided inclined structure that descends from both sides toward the center of the bottom. The structure is such that the earth and sand contained in the main body 2 is urged toward the center of the discharge port 3 and discharged, resulting in good discharge efficiency. As shown in FIG. 2, the discharge port 3 is opened on two sides in parallel with the upper bottom of the hopper body 2.

In such a discharge port 3, rails 4 parallel to the opening surface thereof are provided slightly above the discharge port 3 on both sides of the hopper body 2. Therefore, due to the inclined two-sided structure of the discharge port 3, four rails 4 are provided for one discharge port 3, and a total of eight rails 4 are provided for the two discharge ports 3 as a whole. This rail 4 is made of a round steel bar as shown in FIG. 4, a U-shaped steel as shown in FIG. It is selected as appropriate depending on the size of the device, the installation location, and other requirements.

Further, a gate 6 for opening and closing the discharge port 3 is formed in a U-shape, and three wheels 7 on each side are attached to both sides of the gate 6. The number of wheels 7 is arbitrary as long as there are two or more on each side, and the wheels 7 are mounted on the rail 4 as shown in FIG.
A shape corresponding to the shape of the rail 4 shown in FIG. 5 is selected.

This gate 6 is supported by the hopper body 2 by mounting wheels 7 on the rails 4, and can freely run parallel to the opening surface of the discharge port 3. Note that two gates 6 are provided for each discharge port 3 due to the inclined two-sided structure of the discharge port 3, and a total of four gates 6 are provided with two discharge ports 3 as a whole.

A drive mechanism 8 consisting of an air cylinder is connected to each of these gates 6, and the drive mechanism 8 is rotatably supported on a bracket 9 fixed to the hopper body 2 about an axis lO. The gate 6 can be rotated freely via the shaft 11.
is connected to.

This drive mechanism 8 moves the gate 6 and opens and closes the discharge port 3 by moving its forward and backward shaft forward and backward.

Note that, in addition to the air cylinder, the drive mechanism 8 may employ an oil cylinder or other motor and gear mechanism.

According to such an embodiment, since the movement is parallel to the opening surface of the discharge port 3, there is no need to widen the gap B between the discharge port 3 and the gate 6 in order to secure the movement range of the gate 6, and both It can be narrowed to the extent that it can be rubbed, effectively preventing the outflow of earth and sand. In addition, the movement of the gate 6 is in a direction almost horizontally crossing the weight pressure P of the earth and sand, and the movement resistance is reduced because the gate 6 is moved by wheels 7 that move on the rail 4, and the drive mechanism 8
can be driven with a small driving force.

In addition, when opening and closing the discharge port 3 using the gate 6, if a cushioning material I2 made of rubber or the like as shown in FIG. Collision damage to the closed gate 6 can be prevented, and the space between the closed gates 6 can be closed to improve prevention of earth and sand from flowing out. It is advisable to install a rectangular sand cutting board 13 on the top of this buffer material 12 so as not to obstruct the discharge of soil. Also, as shown in FIG. If it is divided and fixed to both gates 6, the earth and sand cutting plate 13 can be omitted.

In addition to the embodiment shown above, an embodiment may be adopted in which the opening surface of the discharge port 3 is horizontal and the gate 6 is also horizontally moved. It can also be implemented in a hopper used for storing grains, flour, etc., and materials such as stainless steel, synthetic resin, etc. can be selected in addition to iron plates etc. depending on these uses.

[Effects of the Invention] As described above, the hopper gate opening/closing device according to the present invention has the following effects:
Because the gap between the discharge port and gate can be narrowed,
This has the effect of preventing the contents from flowing out. Further, this effect prevents the container from falling unnecessarily to the lower part of the discharge port, thereby improving safety in use, and also having the effect that the entry and exit of a conveyance vehicle or the like for carrying out the stored material is not obstructed.

Furthermore, since this parallel-moving gate is moved by wheels and rails, it does not move close to the weight pressure of the contents in the hopper body, and its movement resistance is reduced, so the gate can be opened with a small driving force. There is an effect that can be done. Furthermore, this effect allows the drive mechanism for driving the gate to be downsized and its support structure to be simplified, resulting in the effect of reducing equipment costs.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the hopper gate opening/closing device according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a side view of Fig. 1.
Fig. 4 is an enlarged sectional view of the main part of Fig. 2, Fig. 5 is a sectional view showing a modification of Fig. 4, and Fig. 6 is an enlarged sectional view of the abutting part of the gate. , FIG. 7 is a sectional view showing a modification of No. 6V, FIG. 8 is a front view showing a conventional example, and FIG. 9 is a cross-sectional view showing a modification of No. 6V.
FIG. 2 is an enlarged cross-sectional view of the main part of the figure. 2 Hopper body 3 Discharge port 4 Rail 6 Gate 7 Wheel 8 Drive mechanism

Claims (1)

[Claims] In a hopper gate opening/closing device, a gate for opening and closing a discharge port opened at the bottom of the hopper body is supported by the hopper body, and a drive mechanism for opening and closing the gate is connected to the gate. A rail is arranged parallel to the opening surface of the discharge port, and wheels that are mounted on the rail are attached to the gate, and the gate is attached to the hopper body so that it can run freely in a direction parallel to the opening surface of the discharge port. Hopper gate opening/closing device characterized by supporting