JPH0223598Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hopper opening/closing device, particularly to a hopper opening/closing device mainly used in a hopper of a combination weighing device.

For example, a combination weighing device is equipped with multiple rows of intermediate hoppers, weighing hoppers, discharge hoppers, etc., and objects to be weighed are frequently loaded into the hoppers and discharged from the hoppers.

As shown in FIG. 1, conventional hoppers of this type usually have one shutter 2, which opens and closes the discharge port 1a of the hopper body 1, rotatably attached to a shaft 3 provided on the hopper body 1. Ta. (In FIG. 1, 1b is the input port.) However, in the combination weighing device, in order to increase work efficiency, it is necessary to shorten the time required to discharge the stored objects to be weighed as much as possible. Therefore, as shown in Fig. 2, two left and right shutters 2, 2 are rotatably attached to shafts 3, 3 on the hopper main body 1, respectively.
2 are opened at the same time to shorten the time required to discharge the object to be weighed.

However, in the conventional hopper in which the two shutters 2, 2 are provided in the hopper main body 1, each shutter 2, 2 is driven by a separate opening/closing device (not shown), so the opening/closing mechanism is complicated. And also, the second
As shown in the figure, when the shutters 2, 2 are closed, the load of the shutter 2 is applied to the opening/closing device, which has the disadvantage that the opening/closing device is easily damaged.

In order to correct these shortcomings, it is necessary to
Applying the technology proposed in No. 12709, in which one end of the cylinder is attached to one shutter, the tip of the piston rod is attached to the other shutter, and the two left and right shutters are opened and closed by moving the piston rod in and out. is possible.

According to this, the two shutters can be operated simultaneously, and the load of the shutters is not applied to the opening/closing device in the closed state.

However, (a) For example, in a hopper used in a combination weighing device,
The object to be weighed (for example, something containing moisture such as food) may adhere to the inside of the two shutters at the bottom of the hopper and fall in a large lump. To avoid weight errors, for example, in a hopper used in a combination weighing device, it is necessary to remove the hopper body and shutter at regular intervals and wash them by immersing them in a water tank to remove deposits.

However, with a structure in which a cylinder and a piston rod are attached to two shutters, as in the technique of Japanese Utility Model Publication No. 12709/1982, it is impossible to remove the hopper body and shutter and soak them in a water tank for cleaning.

(b) Also, since the heavy cylinder and piston rod are attached to the shutter, a large load is applied to the shaft of the shutter. For this reason, when used in the hopper of a combination weighing device that needs to be opened and closed very frequently at high speeds, it is susceptible to damage and cannot be used for a long period of time.

Furthermore, due to this large load, the noise generated when opening and closing becomes extremely loud.

(c) Also, in the hopper used in the combination weighing device,
It is necessary to replace the hopper body and shutter with one of a different size depending on the type of object to be weighed, but since the size of the hopper body and shutter is determined by the size of the cylinder, it is necessary to replace the hopper body and shutter with one of a different size. It is impossible to replace it with another one.

As described above, the technique of Utility Model Publication No. 48-12709 has the above-mentioned disadvantages (a) to (c).

The present invention eliminates these inconveniences, such as the combination weighing device, which requires removal and immersion in a water tank for cleaning, and the need to open and close extremely frequently at high speeds. It is an object of the present invention to provide a hopper opening/closing device that is most suitable for use in a hopper main body and shutter that need to be replaced with a different one.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 3 shows an embodiment of the hopper opening/closing device of the present invention used in a discharge hopper installed below the discharge port of a collection chute of a combination weighing device.

In FIG. 3, 10 is a collection chute of the combination weighing device, 10a is a discharge port of the collection chute 10,
Reference numeral 11 denotes a horizontal member installed horizontally near the collection chute 10. This horizontal member 11 has a
A discharge hopper main body 12 is attached. That is,
As shown in FIG. 4, the discharge hopper main body 12 has two opposing rectangular side walls 12a, 12b, and inclined sides 13, 1 whose lower center is inclined downward.
Two opposing side walls 12 of pentagonal shape with 4
c, 12d, and an input port 1 at the top.
5. A discharge port 16 is formed at the bottom. side wall 1
At the upper ends of 2a and 12b are horizontal mounting pieces 17,
18 is extended, and these mounting pieces 17 and 18 are fixed to the horizontal member 11 by fixtures 19 and 20, respectively.

First fixing shafts 21 and 22 are provided on the two opposing side walls 12c and 12d to protrude outward at the same position in the upper center, respectively. A second fixed shaft 23 is provided below the first fixed shaft 21 and protrudes outward from one side wall 12c.

First and second shutters 24 and 25 are rotatably attached to the first fixed shafts 21 and 22, respectively.

That is, the first shutter 24 consists of two opposing side plates 24a, 24b and an inclined bottom plate 24c, and upper end mounting portions 24a', 2 of the side plates 24a, 24b.
4b' are rotatably attached to the first fixed shafts 21 and 22, respectively. The second shutter 25 also
Similarly, it consists of two opposing side plates 25a, 25b and an inclined bottom plate 25c. The distance between the side plates 25a, 25b of the second shutter 25 is larger than the distance between the side plates 24a, 24b of the first shutter 24.
The upper end mounting portions 25a' and 25b' of the first shutter 24 are attached to the first fixed shafts 21 and 22, respectively.
It is rotatably attached to the outside of 4a and 24b.

Therefore, both side plates 24 of the first shutter 24
The upper end attachment portions 24a', 24b' of a, 24b protrude to the right (in FIG. 3) from the vertical edge 26. Similarly, both side plates 25 of the second shutter 25
The upper end attachment parts 25a' and 25b' of a and 25b protrude leftward from the vertical edge 28. Therefore, in a free state, the first shutter 24 rotates counterclockwise due to its own weight about the first shafts 21 and 22, and the second shutter 25 rotates clockwise due to its own weight. do. Further, a semicircular notch 2 is provided in the vertical edge 26 of one side plate 24a of the first shutter 24.
7, and a semicircular notch 29 is provided in the vertical edge 28 of one side plate 25a of the second shutter 25.

Therefore, in the free state, as shown in Figure 3,
The first shutter 24 rotates counterclockwise around the first fixed shafts 21 and 22, and the vertical edge 26
is located at the center of the side walls 12c, 12d of the discharge hopper main body 12, the notch 27 abuts the second fixed shaft 23, and the inclined bottom plate 24c is located at the center of the side walls 12c, 12d of the discharge hopper main body 12.
It comes into contact with the inclined side 13 of. Further, the second shutter 25 rotates clockwise around the first fixed shafts 21 and 22, so that the vertical edge 28 is aligned with the side wall 1.
Located to the left of the center of 2c, 12d, notch 2
9 is in contact with the second fixed shaft 23, and the inclined bottom plate 2
5c comes into contact with the inclined side 14 of the discharge hopper main body 12. In this state, the vertical edge 28 of the second shutter 25 is wider than the vertical edge 26 so that it is located to the left of the center of the side walls 12c, 12d.

A rotary arm 3 is attached to the tip of the second fixed shaft 23.
0 is rotatably attached in the middle part. A fixed shaft 31 is provided on the side plate 24a of the first shutter 24 to project outward below the second fixed shaft 23, and one end of a first crank 32 is rotatably attached to the fixed shaft 31. The other end of the first crank 32 is rotatably attached to a rotation shaft 30a at one end of the rotation arm 30. The side plate 25a of the second shutter 25 has a second
A fixed shaft 33 is provided above the fixed shaft 23 to protrude outward. One end of a second crank 34 is rotatably attached to this fixed shaft 33, and the other end of the second crank 34 is connected to a rotating arm 30.
It is rotatably attached to a rotation shaft 30b at the other end. The fixed shaft 33 has one end 35a of the drive rod 35.
is engaged from above and rotatably attached so as to come into contact with the semicircular bottom of the inverted U-shaped notch 35a', and the other end 35b of the drive rod 35 is attached to the rotating plate 3.
It is rotatably attached to a fixed shaft 37 provided eccentrically at 6.

The one end 35a of the drive rod 35 has the above-mentioned inverted U shape.
The fixed shaft 33 is engaged with the letter-shaped notch 35a', so by lifting it upward, the fixed shaft 3
It can be removed from 3.

FIG. 5 shows a drive device for rotating the rotary plate 36. As shown in FIG. In the figure, 38 is a motor, and 39 is a gear that decelerates and transmits the rotation of the motor 38.

40 is a clutch brake, 41 is a gear fixed to the input shaft of the clutch brake 40, and gear 39
It's meshing with each other. 42 is a gear fixed to the output shaft of the clutch brake 40, 43 is a gear meshing with this gear 42, and is fixed to a shaft 44 to which the rotating plate 36 is fixed. A disk 45 is fixed to the shaft 44. The disk 45 is provided with a slit (not shown) at its circumferential edge. A light emitter/receiver 46 is installed near the edge of the disc 45, and the rotational position of the rotary plate 36 is detected by detecting the slit.

Next, the operation of the above embodiment will be explained.

When the motor 38 operates, rotation is transmitted to the input shaft of the clutch brake 40 via the gears 39 and 41. When this is transmitted to the output shaft of the clutch brake 40, it is transmitted to the rotating plate 3 via gears 42 and 43.
6 rotates. When the rotary plate 36 rotates, this rotation causes the connecting portion at one end of the drive rod 35 to move to the right (in FIG. 3). For this reason, the drive rod 3
The fixed shaft 33 fixed to the second shutter 25 by the other end of the shaft 33 receives a rightward force and rotates counterclockwise about the first fixed shafts 21 and 22, and simultaneously rotates. The arm 30 rotates clockwise around the second fixed shaft 23, and the first shutter 24 rotates clockwise around the first fixed shafts 21 and 22, as shown in FIG. first shutter 24,
The second shutters 25 simultaneously open left and right. Therefore, the object to be weighed is placed at the discharge port 16 of the discharge hopper main body 12.
is discharged from. When the rotating plate 36 rotates further and returns to the closed state shown in FIG. 3, the light emitter/receiver 46 detects the slit in the disc 45, and the clutch brake 40 separates the input shaft and output shaft, causing the rotating plate 36 to rotate. stops. Therefore, if an opening signal is applied to the clutch brake 40 at regular intervals to connect the input shaft and the output shaft, the motor 38 will remain driven at all times and the detection by the disc 45 and the light emitter/receiver 46 will be effective. The shutter is then opened and closed, and the closed state is maintained for a certain period of time.

As explained above, the hopper opening/closing device of the present invention is constructed, and the driving device 50 for opening and closing the shutter is provided separately from the hopper main body 12 and the shutters 24, 25, and one end 35a of the drive rod 35 is connected to the fixed shaft 3.
(a) The hopper body 12 and shutters 24, 25 can be removed and immersed in a water tank for cleaning.

(b) One end 3 of the drive rod 35 is attached to the shutters 24 and 25.
Since only a slight load is applied from 5a, there is little pain even if the shutters 24 and 25 are opened and closed frequently at high speed, and noise can also be reduced.

(c) The hopper body 12 and shutters 24, 25 can be replaced with ones of different sizes.

Therefore, the hopper opening/closing device of the present invention, like a combination weighing device, needs to be removed and washed by soaking in a water tank, needs to be opened and closed extremely frequently at high speed, and is large in size. Ideal for use with hoppers and shutters that need to be replaced with a different one.

[Brief explanation of the drawing]

1 and 2 are schematic diagrams showing a conventional hopper opening/closing device, and FIG. 3 is a sectional view showing an embodiment of the present invention.
FIG. 4 is a perspective view, FIG. 5 is a sectional view showing the driving means, and FIG. 6 is a side view showing the open state. 10...Collection chute, 10a...Discharge port, 1
1...Horizontal member, 12...Discharge hopper body, 12a
~12d...Side wall, 13,14...Slope side, 15...
...Input port, 6...Discharge port, 21, 22...First fixed shaft, 23...Second fixed shaft, 24...First shutter, 24a, 24b...Side plate, 24c...
Slanted bottom plate, 24a', 24b'...Top end attachment part, 25
...Second shutter, 25a, 25b...Side plate,
25c... Inclined bottom plate, 25a', 25b'... Upper end attachment part, 26, 28... Vertical edge, 27, 29...
Notch, 30... Rotating arm, 31... Fixed shaft,
32...first crank, 33...fixed shaft, 34
...Second crank, 35...Driving rod, 36...
Rotating plate, 37... Fixed shaft, 38... Motor, 40
...Clutch brake, 45...Disc, 46...
Emitter/receiver.

Claims (1)

[Claims for Utility Model Registration] A hopper body 12 having an input port 15 at the top and a discharge port 16 at the bottom, and two opposing side walls 12 of the hopper body 12.
two first fixed shafts 21 and 22 provided on the hopper body 12 so as to protrude outward; and the one side wall 12c of the hopper main body 12.
A second fixed shaft 23 is provided below one of the first fixed shafts 21 to protrude outward.
and the side walls 12c and 12d of the hopper main body 12.
Side plates 24a, 24b and 25 located on the outside of
a, 25b, respectively, and the side plates 24a, 24
b and 25a, 25b upper end attachment parts 24a', 24
b', 25a', 25b' are rotatably attached to the first fixed shafts 21 and 22, respectively, on the outside of the side walls 12c, 12d of the hopper main body 12, and Exit 1
first and second shutters 24 and 25 that cooperate with each other to open and close the first and second shutters 24 and 25;
a rotating arm 30 whose intermediate portion is rotatably attached on the outside of a; and the one side plate 24 of the first shutter 24.
a, a first crank 32 having one end rotatably attached to the outside of the side plate 24a and the other end rotatably attached to one end of the rotary arm 30;
and the one side plate 25 of the second shutter 25
a second crank 34, one end of which is rotatably attached to the outside of the side plate 25a, and the other end of which is rotatably attached to the other end of the rotary arm 30;
a drive device 50 having a rotating plate 36 and rotating the rotating plate 36 and disposed on the side of the hopper main body 12; and is removably engaged with the other end 35
A hopper opening/closing device comprising: a drive rod 35 rotatably attached to a fixed shaft 37 eccentrically provided on the rotary plate 36;