JP2002139371A - Combined weighing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a subject to be weighed from spilling and prevent noises, when opening and closing apparatus. SOLUTION: A hopper 8 comprises a cylindrically formed hopper body 8a, with an upwardly open inlet 24 and a downwardly open outlet 25, and a discharge door 8b for opening and closing the outlet 25. The discharge door 8b has a hanging piece 40b, extended downwardly from the outer peripheral edge of an upper surface plate 40a, with the lower end of the hanging piece 40b which has an outwardly extended flange piece 40c. When the discharge door 8b is closed, a first clearance H1 forms between the outer wall surface of the hanging piece 40b and the inner wall surface of the outlet 25 and a second clearance H2 forms between the upper wall surface of the flange piece 40c and the lower end edge of the outlet 25. Thus, it is possible to prevent the subject to be weighed from dropping, using both the first clearance H1, having a height equal to the extended length of the hanging piece 40b and the flange piece 40c. Also, the first clearance H1 and the second clearance H2 eliminate contact between the discharge door 8b and the outlet 25, thereby preventing noise, when the door is opened or closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device capable of weighing and weighing an object such as food in a container or a predetermined mass in order to wrap the object in a container or a predetermined mass. is there.

[0002]

2. Description of the Related Art Generally, in a packaging process of a food production line,
2. Description of the Related Art A combination weighing apparatus capable of weighing and discharging predetermined objects by a predetermined mass is used for bagging foods (objects to be weighed) having a fine lump unit.

In this type of combination weighing apparatus, a plurality of radially-directed transport troughs are provided around a conical dispersion portion, and a stock hopper is disposed below a leading end downstream of each transport trough. A weighing hopper is arranged at the lower part of the hopper, and a funnel-shaped collecting chute is provided at the lower part of the weighing hopper.

[0004] The objects to be weighed are supplied to a dispersion section by a conveyor or the like, and the objects to be weighed are arbitrarily divided in a radial direction by each transport trough and supplied to each stock hopper, and the objects supplied from each stock hopper are supplied. The mass of the sample is weighed for each weighing hopper. Thereafter, the weights of the objects to be weighed in the plurality of weighing hoppers are combined and added, a combination of weighing hoppers having a predetermined mass or a desired mass close thereto is selected, and the selected weighing hoppers are operated to collect the objects to be weighed. Drop it on a chute and send it to the next process such as a packaging machine.

[0005] In the conventional combination weighing device thus configured, for example, as shown in FIG. 23, a dispersing section 120 is provided at the upper part of a housing. A transport trough 121 is provided around the dispersion unit 120. On the downstream side of the transport trough 121, a stock hopper 122 and a weighing hopper 123 are provided.
Brackets 125 and 1 protruding from the outer periphery of housing 124
26 are respectively supported. The stock hopper 122 and the weighing hopper 123 are provided on the rear side (the housing 124).
Side) provided by the engaging members 122a and 123a.
The brackets 125 and 126 are detachable so that cleaning and maintenance can be performed.

[0006] Stock hopper 122 and weighing hopper 1
23 has flat discharge doors 122c and 123c that open and close the lower discharge ports 122b and 123b, respectively. In addition, the stock hopper 122 and the weighing hopper 12
3 is an opening / closing link mechanism 122d, 123d connected to the discharge doors 122c, 123c and a recovery spring 122e, 1
23e is provided on the outer surface of the wall. The movable bodies 127 and 128 driven by a driving source (not shown) are provided on the housing 124 side.
Is provided so as to protrude outward, and the movable body 127,
128 is a stock hopper 122 and a weighing hopper 123
Of the open / close link mechanisms 122d and 123d. Then, the movable doors 127 and 128 are driven to drive the discharge doors 122c and 122d through the opening and closing link mechanisms 122d and 123d.
123c is opened, and the discharge doors 122c, 123c are closed by the recovery springs 122e, 123e. Note that, in FIG.
Are partially shown, and the transport trough 12
1. The stock hopper 122 and the weighing hopper 123
Each is shown alone.

[0007]

However, in the conventional combination weighing device described above, each hopper 122, 123
However, the lower discharge ports 122b and 123b are opened and closed by flat discharge doors 122c and 123c.
The discharge doors 122c and 123c are connected to the discharge ports 122b and 1
The closed state is obtained by abutting the plate surface against 23b.
Further, the discharge doors 122c and 123c are inclined such that the open / close end faces downward when the door is closed, so as to collect the objects to be weighed at the open / close end and to improve the discharge speed of the objects to be weighed when opened. I have. According to these configurations, when a gap is formed between the discharge ports 122b and 123b and the discharge doors 122c and 123c, there is a problem that a small or thin object to be weighed spills out of the gap.

The discharge ports 122b, 123b and the discharge door 1
The gap between the discharge doors 122c and 123c is
This can be improved by increasing the pressing strength of the 23c against the discharge ports 122b and 123b (the strength of the recovery springs 122e and 123e). However, in the conventional combination weighing device, the discharge doors 122c, 1 are provided by the recovery springs 122e, 123e.
23c, the discharge doors 122c, 123c
Collides strongly with the outlets 122b, 123b when closing. As described above, the combination weighing device is provided with the plurality of stock hoppers 122 and the weighing hoppers 123, and the discharge doors 122c,
Since the opening and closing of 123c is frequently repeated, a loud noise is generated.

Thus, in the conventional combination weighing device,
The discharge door 122c,
Increasing the pressing force of the 123c against the outlets 122b, 123b generates noise. If the recovery springs 122e, 123e having a small tensile force are used to eliminate the noise, the noise is generated between the outlets 122b, 123b and the discharge doors 122c, 123c. There is a gap between the weighing objects, and the objects to be weighed fall off. Therefore, it was not possible to solve both the problem of spilling of the object to be weighed and the problem of noise.

Accordingly, an object of the present invention is to provide a combination weighing apparatus provided with a hopper capable of preventing both spilling of an object to be weighed and noise at the time of opening and closing the object.

[0011]

According to a first aspect of the present invention, there is provided a combination weighing apparatus according to the present invention, comprising:
A plurality of hoppers 7, 8, 9 for storing and weighing objects to be weighed in predetermined amounts in the dispersion direction of
Collecting means 10 disposed below each of the hoppers 7, 8, 9 to collect and discharge the discharged objects to be weighed;
In a combination weighing device that obtains an object to be weighed having a predetermined mass by selecting and combining a plurality of hoppers 7, 8, and 9 based on the weighed values, each of the hoppers 7, 8, and 9 includes a storage port 24 that is opened upward. And outlet 25 opened downward
Hopper bodies 7a, 8a, 9a formed in a cylindrical shape
And a vertical piece 40b extending downward at the outer peripheral edge of the upper plate 40a formed in a plate shape. The outer wall surface of the vertical piece 40b and the discharge port 25 of the hopper body 7a, 8a, 9a are formed. A discharge opening 7b, 8b, 9b driven to close and open the discharge port 25 can be provided by providing a first clearance H1 between the inner wall surface and the discharge port 25.
And characterized in that:

According to a second aspect of the present invention, there is provided the combination weighing apparatus according to the first aspect.
b, 8b, and 9b have a flange piece 40c extending outward at the lower end of the hanging piece 40b.
Upper wall surface and the outlet 2 of the hopper body 7a, 8a, 9a
The discharge port 25 can be set in a closed state by providing a second gap H2 between the lower end of the discharge port 5 and the bottom edge of the discharge port 5.

According to a third aspect of the present invention, there is provided the combination weighing apparatus according to the second aspect, wherein the second gap portion H2 drives the discharge doors 7b, 8b, 9b to open and close within a predetermined angle range. Thus, it is obtained by a drive mechanism for setting the closing position.

According to a fourth aspect of the present invention, there is provided the combination weighing apparatus according to the second or third aspect, wherein the upper wall surface of the flange piece and the hopper body are provided.
a, 8a, and 9a are provided with an adjustment mechanism that enables adjustment of the second gap H2 between the lower end edge of the discharge port 25.

[0015]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the combination weighing device 1 of the present invention, FIG. 2 is a plan view of the combination weighing device, and FIG. 3 is a side view of the combination weighing device.

As shown in FIGS. 1 to 3, a dispersing and supplying unit 2 is provided at the center of the upper portion of the combination weighing device 1 and immediately below the position where the articles are put. The dispersion supply unit 2 includes a dispersion unit 3
And a transport trough 4.

The dispersing section 3 is formed in a flat conical shape with the center protruding upward, and has a driving means for rotating the dispersing section downward. Supply means not shown (for example, conveyor)
Supplies the objects to be weighed onto the dispersing portion 3, so that a large number of objects to be weighed are constantly stacked on the dispersing portion 3, and the objects to be weighed are evenly spilled to the periphery by the rotation and supplied.

Around the dispersion section 3, a plurality of transport troughs 4 are provided in a radial arrangement. Each transport trough 4
Has a linear transport path, and is provided with a driving means for reciprocating and linearly moving at a lower portion thereof. Each transport trough 4
They are arranged in an annular shape at equal angular intervals in the circumferential direction around the dispersion supply unit 2. Therefore, the objects to be weighed supplied to the respective transport troughs 4 are transported toward the outside (outer end side) of the arrangement by driving of the driving means.

The outer outer end of each transport trough 4 is in an open state, from which an object to be weighed falls. A stock hopper 7 is arranged below the outer end of each transport trough 4. That is, a plurality of stock hoppers 7 of the same number as the transport troughs 4 are circumferentially arranged at equal intervals.
The stock hopper 7 has a lower surface of a cylindrical hopper body 7a that is opened upward and is closed by a discharge door 7b that can be opened and closed.

Below each stock hopper 7, a weighing hopper 8 is arranged. That is, a plurality of weighing hoppers 8 of the same number as the stock hoppers 7 are circumferentially arranged at equal intervals. The weighing hopper 8 is closed by a discharge door 8b that can be opened and closed on the lower surface of a cylindrical hopper body 8a that opens upward. The weighing hopper 8 weighs the object to be weighed stored therein by a weighing means (not shown) inside the main body.

A memory hopper 9 is arranged below each weighing hopper 8. That is, a plurality of memory hoppers 9 of the same number as the weighing hoppers 8 are circumferentially arranged at equal intervals. The memory hopper 9 is closed by a discharge door 9b that can be opened and closed on the lower surface of a cylindrical hopper body 9a that opens upward. An object to be weighed by the weighing hopper 8 is stored and held in the memory hopper 9.

As shown in FIG. 2, the stock hopper 7, the weighing hopper 8, and the memory hopper 9 are vertically arranged in this order from top to bottom, and are arranged inside the apparatus from top to bottom. In addition, they are arranged so that the inclination in the discharge direction of the objects to be weighed is gentle. The object to be weighed stored in the memory hopper 9 at the last stage is the discharge door 9 on the lower surface.
When b is opened, it is dropped and discharged.

A plurality of memory hoppers 9 arranged circumferentially
Below the collecting chute 1 as a funnel-shaped collecting means
0 is provided (see FIG. 3). The collecting chute 10 of this example is a hollow truncated cone having a relatively large inlet on the upper surface and a relatively small outlet on the lower surface. The collecting chute 10 collects the objects to be weighed discharged from the respective memory hoppers 9 and discharges them downward.

At the center of the apparatus, a substantially circular mortar-shaped main body 15 as viewed from the side is provided, and the dispersion supply section 2 is disposed on the substantially planar upper surface. The above-described stock hopper 7, the weighing hopper 8, and the memory hopper 9 are arranged on the entire side surface. The main body 15 has a substantially circular mortar shape, and the hoppers 7, 8, and 9 are arranged inside the apparatus as going from top to bottom. Therefore, the collecting chute 10 can be small in size with an opening diameter at the upper end being small. The memory hopper 9 has a sliding portion 9c of a predetermined length in the height direction up to the collecting chute 10 as shown in the figure.

Although not shown, each driving means for the dispersion section 3 of the dispersion supply section 2 and the transport trough 4 is provided inside the main body section 15. In addition, the hopper 7,
There are provided drive means 8 and 9 and weighing means such as a load cell for weighing the object put into the weighing hopper 8. The main body 15 is supported by a plurality of columns 16.

The weighing operation according to the above configuration will be described. The objects to be weighed are dispersed in the dispersion section 3 of the dispersion supply section 2 in the radial direction of the plane, and are distributed substantially evenly to the stock hopper 7 by the plurality of transport troughs 4 provided in the dispersion direction. The objects to be weighed are dropped into the respective weighing hoppers 8 by approximately the same amount via the stock hoppers 7, and the weights of the weighed objects are dropped into the memory hoppers 9. Then, a combination of the weighing values of the plurality of weighing hoppers 8 for obtaining the desired mass value is calculated, and the memory hopper 9 is opened. In the meantime, the next weighing object is weighed in the weighing hopper 8. After the discharge of the memory hopper 9, the objects to be weighed in the weighing hopper 8 where the weighing has been performed are immediately put into the memory hopper 9 and the discharging is performed in the following combination.

As described above, if the memory hopper 9 and the weighing hopper 8 are provided, the work becomes more efficient than the case where the weighing is performed by the weighing hopper 8 and discharged directly to the collecting chute 10. A device (not shown) for packing the objects to be weighed is provided below the collecting chute 10 so that the objects to be weighed having a predetermined mass can be packed.

Hereinafter, the stock hopper 7, the weighing hopper 8, and the memory hopper 9 will be described. 4 is a side view showing the hopper, FIG. 5 is a plan view showing the hopper, FIG. 6 is a partial perspective view of the hopper, and FIG. 7 is a perspective view showing the discharge door. The hopper shown in each figure is the stock hopper 7 described above,
The weighing hopper 8 of the weighing hopper 8 and the memory hopper 9 is shown. Other stock hopper 7 and memory hopper 9
Since the configuration is the same as that of the weighing hopper 8, the description is omitted in place of the weighing hopper 8.

The weighing hopper 8 is, as described above,
a and a discharge door 8b. The hopper body 8a has a substantially quadrangular pyramid shape in which a front plate 20, a rear plate 21, and both side plates 22, 23 are connected in a rounded shape. Hopper body 8a
The upper half portions of the upper and lower side plates 22 and 23 stand in parallel with each other.
And a front plate 20 that gradually expands in a trumpet shape toward the upper side.
And a storage opening 24 opened at the upper end of the rear plate 21. The lower half of the hopper body 8a is provided with both side plates 22 and 23 which stand in parallel to each other, and a discharge port 25 which is opened at the lower end of the front plate 20 and the rear plate 21 which gradually become narrower. .

A little above the lower half of the hopper body 8a,
A strip 26 having a substantially U-shape as shown in FIG. 5 is fixed by a suitable means such as welding along the side plate 23 from the side plate 22 via the back plate 21. Side plate 2 of this strip 26
On the 3 side, a hook 27 is integrally protruded by bending or the like.

The hook 27 has a substantially U-shape that opens downward as shown in FIG. 4, and a first flat plate 28 in the vertical direction bent at a right angle from the end 26a of the strip 26, A flat upper plate 29 which is curved in an arc shape from the upper end of the leg plate 28, is connected in the horizontal direction, and is orthogonal to the first leg plate 28.
And a second leg plate 30, which is continuously formed in a downwardly arcuate shape from the end of the upper plate 29 and is parallel to the first leg plate 28.

As shown in FIG. 6, at the lower end of the first leg plate 28, each of the inclined end surfaces 31a, 31a whose lower side is expanded in a C-shape.
And a first engaging concave portion 31 formed in a concave shape having a concave portion. At the lower end of the second leg plate 30, there is provided a second engaging concave portion 32 formed in a concave shape with each inclined end surface 32a, 32a whose lower side expands in a C-shape. Also, the upper plate 29
Is provided with an engagement hole 33 at substantially the center thereof. The engagement hole 33 has a hole edge end surface 33a in which the outside of the inside shape of the hole is linear. The second leg plate 32 has a tongue piece 30a extending to the band plate 26 side.
The tip is fixed to the strip 26 by welding or the like.

As shown in FIG. 5, mounting shafts 35 and 36 are implanted on the side plate 22 and the side plate 23 of the hopper body 8a in the strip 26 so as to be located on the same straight line. . Plate-shaped parallel rotating arms 37 and 38 are rotatably attached to the mounting shafts 35 and 36, respectively.

As shown in FIG. 4 and FIG.
An adjustment plate 80 is provided so as to overlap the outer surface of the pivot arm 38 on the side. The adjustment plate 80 is rotatably mounted on the mounting shaft 36 similarly to the rotating arm 38. At the lower end of the adjustment plate 80, a slit 81 that opens downward is provided as an engagement portion with a drive mechanism described later.

FIG. 8 is an exploded perspective view showing the engaging portion. As shown in FIG. 8, the slit 8 on the outer surface of the adjustment plate 80 is provided.
A plate-like spacer 82 is fixed to the portion 1 by appropriate means such as welding. The spacer 82 has a notch 83 overlapping the slit 81. Notch 83 is entrance 8
3a and a circular portion 83b at the back thereof. Entrance 83
“a” slightly closes the opening of the slit 81, and the circular portion 83 b is provided so as to surround the slit 81.

Circular portion 83b of notch 83 of spacer 82
A rotatable body 84, which is in the form of a disk that can rotate in contact with the inner peripheral surface of the circular portion 83b and has a thickness slightly smaller than that of the spacer 82, is accommodated therein. The rotating body 84 is provided with an engagement slit 85 in the diameter direction. On both sides of the entrance of the engagement slit 85, tapered portions 85a, 85a are provided for facilitating insertion of a portion on the drive mechanism side.

A cover plate 86 is fixed to the outer surface of the spacer 82 by appropriate means such as welding so that the rotating body 85 does not come off. The cover plate 86 has tapered portions 87 on both sides of the entrance.
a, a notch 87 having a rectangular shape having 87a. A plate-like stopper 88 bent inward is provided at the back of the notch 87. This stopper 88
It is in a state of having entered into the deep part of the engagement slit 85 of the rotating body 84, and regulates the rotation range of the rotating body 84. Thus, the positional relationship between the engagement slit 85 of the rotating body 84 and the entrance 83a of the spacer 82 is maintained.

As shown in FIGS. 4 and 6, the adjusting plate 80
Is provided with an oval cam hole 9 on the side of the slit 81.
0 is provided. The adjusting plate 80 is connected to the turning arm 38 through the cam hole 90, and turns with the turning arm 38 about the mounting shaft 36.

FIG. 9 is a sectional view showing a connecting portion between the rotating arm and the adjusting plate. As shown in FIG. 9, a bolt 91 is fixed to the rotating arm 38. The bolt 91 has a head portion 91a fixed to the back surface of the rotating arm 38 by appropriate means such as welding or the like, and a shaft portion 91b penetrates through the hole 38a of the rotating arm 38 to protrude to the outer surface side. It penetrates the cam hole 90.

The shaft portion 91b of the bolt 91 penetrates the hole 93 of the cam body 92 housed in the cam hole 90, and further projects outward. The cam body 92 has a dimension larger than the minor axis of the elliptical cam hole 90, for example, a regular hexagonal plate-like base 92a.
have. A circular disk 92b having a diameter slightly smaller than the short axis and having a thickness slightly smaller than the thickness of the adjusting plate 80 is projected from the back surface of the base 92a. The hole 93 penetrates the cam body 92 at a position eccentric from the center of the perfect circle of the disk 92b. And base 9
By screwing the cap nut 94 from the tip of the shaft portion 91b of the bolt 91 on the outer surface of 2a, the adjusting plate 80 rotates while the disc 92b of the cam body 92 is accommodated in the cam hole 90. It is fastened and fixed between the outer surface of the arm 38 and the base 92 a of the cam body 92. Thus, the rotating arm 38 and the adjustment plate 80 are connected.

When the cap nut 94 is loosened and the cam body 92 is rotated, the disk 92b of the cam body 92 is eccentrically rotated about the shaft portion 91b of the bolt 91 fixed to the rotating arm 38. As a result, the hole end face of the oval cam hole 90 is pressed by the peripheral edge of the disk 92b, and the rotating arm 38 and the adjustment plate 80 are relatively moved about the mounting shaft 36 as shown in FIG. Can be moved.

As shown in FIGS. 4 to 7, the rotating arms 37,
A discharge door 8b is fixed to each of the rotating ends 38. The discharge door 8b has a downwardly extending piece 40b on the outer peripheral edge of the upper plate 40a formed in a flat shape. Also,
At the lower end of the hanging piece 40b, a flange piece 4 extending outward is provided.
0c is provided. Also, the upper surface plate 40a, the vertical piece 40
b, the respective outer peripheral shapes formed by the flange pieces 40c are substantially rectangular. The top plate 40a, the vertical piece 40b, and the flange piece 40c can be smoothly and continuously bent by pressing a flat plate into an uneven shape.

In the discharge door 8b, a flange piece 40c at an opposing position is fixed to the rotation ends of the rotation arms 37 and 38. The rotating arms 37, 38 and the flange piece 40c are in a perpendicular positional relationship. For fixing the rotating arms 37 and 38 and the flange piece 40c, for example, the flange piece 4
Oc and the rotating arms 37 and 38 are integrally and continuously bent or fixed by welding or the like.

Ejection door 8b fixed to rotating arms 37, 38
Opens and closes the discharge port 25 of the hopper body 8a with the rotation of the rotating arms 37 and 38. When the discharge door 8b closes the discharge port 25, the top plate 40a and the vertical piece 40b
5, the flange piece 40 c extends outward from the lower end of the discharge port 25. At this time, the discharge port 25 and the discharge door 8b are formed between the outer wall surface of the hanging piece 40b and the inner wall surface of the discharge port 25 so as to form the first gap H1. In addition, as shown in FIG.
Each of the side plates 2 has a lower edge below the rear plate 21.
Since the lower edges of 2, 23 are inclined with this,
The discharge door 8b is inclined toward the front plate 20 and the discharge port 25
Will be closed.

The discharge door 8b is configured to open toward the back plate 21 of the hopper body 8a depending on the positions of the mounting shafts 35 and 36 to which the rotating arms 37 and 38 are mounted. Thereby, when the vertical piece 40b is provided on the back plate 21 side,
There is a possibility that the vertical piece 40b may come into contact with the lower edge of the discharge port 25 on the back plate 21 side. Therefore, in the present embodiment, an inclined surface 40d reaching the flange piece 40c is provided on the upper surface plate 40a so as to eliminate the vertical piece 40b on the back plate 21 side. In addition,
If the position of the mounting shafts 35 and 36 is changed to change the opening / closing trajectory of the discharge door 8b, the vertical piece 40b is also provided on the back plate 21 side.

When the discharge door 8b closes the discharge port 25, the flange piece 40c extends outside the lower end of the discharge port 25. In between, a second gap H2 is provided. The second gap H2 is obtained by setting the closing position of the discharge door 25 by a drive mechanism described below that opens and closes the discharge door 8a.

Hereinafter, the driving mechanism will be described. FIG.
Is a perspective view of the drive mechanism, FIG. 12 is a side view of the drive mechanism,
13 is a front view of the drive mechanism, FIG. 14 is a cross-sectional view of the drive mechanism in a side view, and FIG. 15 is a cross-sectional view of the drive mechanism in a front view.

The driving mechanism is the above-described stock hopper 7,
In order to support and drive the respective hoppers corresponding to the respective hoppers of the weighing hopper 8 and the memory hopper 9, a plurality of drive arms 46 provided on the main body 15 as shown in FIGS. It is distributed over.

The drive arm 46 has a hollow cylindrical arm 47 whose base is open. At the base of the arm 47,
An attachment flange 48 for attachment to the main body 15 is provided. The flange 48 is connected to the drive arm 4 supporting the stock hopper 7 and the memory hopper 9.
In the case of 6, the drive arm 46 supporting the weighing hopper 8 is fixed to the main body 15, and in the case of the drive arm 46 supporting the weighing hopper 8, it is fixed to the load cell side (not shown) which is the weighing means disposed in the main body 15.

As shown in FIG. 14, the tip surface 4 of the arm 47
A screw hole 49 is provided at the center of 7a. The screw hole 49 is closed by screwing a cap screw 50. Since the cap screw 50 is screwed into the screw hole 49 via the waterproof ring 51, the arm part 47 is waterproofed in the cylinder.

In the vicinity of the tip of the arm portion 47, there is provided an annular groove 52 which is recessed in a circumferential shape. A tapered portion 52a is formed in the opening of the annular groove 52.

The arm 47 is provided with a circular bulge 53 on the base side of the annular groove 52. The circular bulge 53 is formed in a bottomed cylindrical shape with one end opened. This circular bulging body 53 has one end opened in a lateral direction orthogonal to the longitudinal direction of the arm portion 47, the bottom plate 53a side being on a tangent to one side of the arm portion 47, and one end side being an arm. It is integrated above the arm 47 so as to protrude from the other side of the part 47. Thereby, the space in the cylinder of the arm portion 47 and the space in the cylinder of the circular upper swelling body 53 form an integrated space.

As shown in FIGS. 14 and 15, a plurality of (three in FIG. 14) studs 54 are protruded from the inner surface of the bottom plate 53a of the cylindrical bulge 53. The stud 54 has a first holding plate 5 holding a first bearing 55.
6 and a second holding plate 58 holding the second bearing 57
Has been fixed. First holding plate 56 and second holding plate 5
The spacer 7 is formed by screwing the tip of a long screw 60 from the second holding plate 57 side into the stud 54 through the stud 59 via a hollow cylindrical spacer 59 therebetween.
Are fixed parallel to each other with an interval of.

The second holding plate 58 is provided with a stud 61 having a screw hole. The stud 61 has a disk cover 6 for closing an opening 53b at one end of the cylindrical bulging body 53.
2 is attached by screws 63. Note that a ring-shaped packing 64 for waterproofing is sandwiched between the disk cover 62 and the opening 53b.

The first bearing 55 and the second bearing 57 are arranged coaxially and hold the shaft 65 rotatably. The shaft 65 protrudes outward from the bottom plate 53a via a waterproof disk-shaped packing 66 fitted in a hole in the bottom plate 53a of the cylindrical bulging body 53. An end of the shaft 65 protruding outward from the bottom plate 53a is fixed to an upper end of a band-shaped opening / closing drive lever 67 parallel to the bottom plate 53a. The lower end of the opening / closing drive lever 67 is engaged with the discharge door 8b (7b, 9b) side of the weighing hopper 8 (7, 9). Collar 67
a is protrudingly provided.

An upper end of a crank 68 is fixed to a portion of the shaft 65 between the first bearing 55 and the second bearing 57. The lower end of the crank 68 is attached to an operation bar 69 housed inside the arm 47.

As shown in FIG. 15, the operating bar 69 has a U-shaped cross section comprising a band plate 69a and side plates 69b, 69b bent at right angles along the longitudinal direction on both sides of the long band plate 69a. It is in a state. The operation bar 69 is shown in FIG.
As shown in FIG. 12, the arm 47 is housed inside the arm 47 with one end protruding outward from an opening on the base side of the arm 47. One end of the operation bar 69 is rotatably attached to a pin 70a of a rotating plate 70 which is rotated by an opening / closing drive motor (not shown) provided on the main body 15 side.

As shown in FIGS. 14 and 15, the arm 4
A rectangular parallelepiped block 71 is arranged on the other end of the operation bar 69 housed in the cylinder 7. Block 71
Between both side plates 69b, 69b of the operation bar 69, the band plate 69
It is movably supported in the longitudinal direction along a. The lower end of a crank 68, the upper end of which is fixed to the shaft 65, is rotatably attached to a pin 72 implanted at one end of the block 71.

As shown in FIG. 14, a screw hole 73 is provided on the other end surface of the block 71 in the longitudinal direction. The other end of the operation bar 69 is provided with an edge plate 69c. A coil spring 74 is interposed between the other end surfaces of the blocks 71 and the edge plate 69c, and between the side plates 69b, 69b of the operation bar 69. Further, the edge plate 6
An adjusting screw 75 inserted through a hole 9c via a coil spring 74 is screwed into a screw hole 73 of the block 71.

As a result, the coil spring 74 compressed between the other end surface of the block 71 and the edge plate 69 c is
1 and the inner surface of the edge plate 69c.
Is urged to the left in FIG. 14 away from the edge plate 69c. The block 71 stops at a position where the head of the adjusting screw 75 contacts the outer surface of the edge plate 69c while being urged by the coil spring. That is, the block 71 stops at a position determined by the screwing depth of the adjusting screw 75.

In the drive mechanism described above, when the rotating plate 70 shown in FIG. 12 rotates, the operating bar 69 reciprocates in the arm 47 in the longitudinal direction. Next, the crank 68 reciprocates around the shaft 65 in response to the movement of the operation bar 69, and simultaneously rotates the shaft 65 reciprocally. Then, axis 6
In response to the reciprocating rotation of No. 5, the opening / closing drive lever 67 rotates clockwise in FIG. 14 within a predetermined angle range, and then rotates counterclockwise to return to the original position.

A hole is provided in the center of the upper part of the cylindrical bulging body 53, and the lower end of the columnar engaging projection 76 is fixed by caulking so as to protrude upward from the hole. The cylindrical engagement protrusion 76 is provided on the bottom plate 5 of the cylindrical bulge 53.
A notch 77 is provided on the side opposite to 3a, and a flat taper portion 77a that is inclined so as to be depressed toward the center of the engagement protrusion 76 is provided on the upper portion of the notch 77.

The above-described weighing hopper 8 is attached to the driving arm 46 as a driving mechanism configured as described above as follows. Note that the stock hopper 7 and the memory hopper 9 are attached in the same manner as the weighing hopper 8, and thus the description thereof is omitted.

FIG. 16 is a side view showing a state where the hopper is attached to the drive mechanism, FIG. 17 is a partially cut front view showing the same state, and FIG.
19 is a partially cutaway rear view of the same state, and FIGS. 19 and 20 are explanatory views showing the engagement relationship between the driving parts of the hopper and the driving mechanism. As shown in FIGS. 16 to 18, the weighing hopper 8
The hook 27 is positioned and attached to the drive arm 46.

Specifically, the outlet 25 of the hopper body 8a
To support the discharge door 8b from below. Next, the engagement protrusion 6 of the opening / closing drive lever 67 in the drive arm 46
The slit 81 of the adjusting plate 80 (the inlet portion 83a of the notch 83 in the spacer 82 and the notch 87 of the cover plate 86) is inserted into the upper end of 7a. At the same time, the first leg plate 28 of the hook 27 is moved through the engagement hole 33 of the upper plate 29 of the hook 27 through the engagement protrusion 76 projecting upward from the cylindrical bulge 53 of the drive arm 46. Tapered portions 52a, 52a with respect to the annular groove 52 of the arm portion 47
And the second leg plate 30 is placed on the base side of the cylindrical bulge 53 of the arm 47.

As a result, as shown in FIG.
Inclined end face 31 of the first engagement recess 31 cut out in a C shape
a, 31a are in contact with the groove bottom of the annular groove 52, and as shown in FIG. 18, the inclined end surfaces 32a, 32a of the second engaging recess 32 of the second leg plate 30 cut out in a C-shape are cylindrical. Arm 4
The weighing hopper 8 is positioned in the longitudinal direction of the arm portion 47 in contact with the upper side of the arm 7. In addition, due to the rotational moment clockwise in FIG. 17 due to the mass of the hopper body 8a, the linear hole edge end face 33a in the engagement hole 33 of the upper plate 29 becomes
The measuring hopper 8 is brought into contact with the tapered portion 77a of the notch 77 of the engagement projection 76, and
Is stably held in the state supported by.

Further, the engagement protrusion 67 of the opening / closing drive lever 67
a enters the engagement slit 85 of the rotating body 84,
It engages with the adjustment plate 80 (rotating arm 38). According to this engagement, in the present embodiment, the width of the slit 81 of the adjustment plate 80 is increased, and a rotating body 84 is provided. The engaging slit 67 is engaged with the rotating projection 84 without looseness. 85 are provided. Thereby, for example, even when the engaging protrusion 67a is in the same direction as the slit 81 as shown in FIG. 19, or when the engaging protrusion 67a is oblique as shown in FIG. 20, the tapered portion 85a guides the engaging protrusion 67a. The engagement of the engagement slit 85 with the engagement protrusion 67a while the rotating body 84 is rotating allows the engagement between the slit 81 (engagement slit 85) and the engagement protrusion 67a to be smoothly and smoothly inserted. it can.

As described above, the weighing hopper 8 is
In the state where (7, 9) is mounted, the mounting shafts 35, 36
A shaft 65 of an open / close drive lever 67 of the drive arm 46;
They are on the same axis.

The weighing hoppers 8 (7, 9) attached to the drive arm 46 are turned by the opening / closing drive lever 67 that rotates within a range of a predetermined angle on the drive mechanism side. The discharge port 25 is opened and closed by rotating the discharge door 8a (7a, 9a) around the mounting shafts 35, 36 within the range of the predetermined angle.

Therefore, in the combination weighing apparatus 1 described above, the discharge door 8a (7a, 9a) is housed inside the discharge port 25 with the discharge port 25 closed, and
Piece 40 that creates a first gap H1 between the inner wall surface
b is provided. As a result, the inner wall surface of the discharge port 25 surrounds the upper surface plate 40a of the discharge door 8a (7a, 9a) on which the object is placed via the first gap H1, and
Since the first gap H1 has the height of the extension of the vertical piece 40b, the object to be weighed is less likely to fall.

Further, since the discharge door 8a (7a, 9a) closes the discharge port 25 through the first gap H1, contact between the discharge door 8a (7a, 9a) side and the discharge port 25 side occurs. Absent. Thereby, since the discharge door 8a (7a, 9a) is opened and closed and the collision noise is eliminated, the noise of all hoppers can be prevented.

Further, the lower end of the vertical piece 40b has an outlet 2
5 is provided with a flange piece 40c extending outward from the lower end of the discharge port 25 with the block 5 closed. This allows
Even if the object to be weighed tries to pass through the first gap H1,
Since this is prevented by the flange piece 40c, even a small or thin object to be weighed can be prevented from falling.

The flange piece 40c is connected to the outlet 2
5 has a second gap H2 between its upper wall surface and the lower end edge of the discharge port 25 in a state where it is closed. This second gap H
2 is a case where the above-described driving mechanism is configured such that the discharge door 8a
(7a, 9a) are opened and closed, and the discharge door 8a (7a, 9a) is opened.
By setting the stop position at the time of closing in 9a), it is possible to stably obtain. Thereby, the discharge door 8a (7a,
Since the collision sound is eliminated by opening and closing 9a), noise of all hoppers can be prevented.

The interval of the second gap H2 generated between the upper wall surface of the flange piece 40c and the lower edge of the discharge port 25 is as follows.
It can be adjusted by an adjusting mechanism. This adjustment is performed in the present embodiment at two points of the above-described configuration.

As the first adjusting mechanism, the cover mechanism 50 is removed from the screw hole 49 at the tip of the arm portion 47 by turning on the driving mechanism, and the adjusting screw 75 desired for the arm portion 47 is rotated from the screw hole 49 to block. The angle of the crank 68 (open / close drive lever 67) is adjusted by adjusting the length of the screw 71 into the screw hole 73 and adjusting the position of the block 71 (see FIG. 14). Thereby, since the rotating arms 37 and 38 rotate about the mounting shafts 35 and 36 to change the position of the discharge door 25 in the closed state, the interval of the second gap H2 can be adjusted.

As the second adjustment mechanism, the hole end face of the oval cam hole 90 is pushed by the peripheral edge of the disc 92b by engaging the adjustment plate 80, loosening the cap nut 94 and rotating the cam body 92. Then, the rotating arm 38 moves about the mounting shaft 36 with respect to the adjustment plate 80 stopped by the opening / closing drive lever 67 (see FIG. 10). Thereby, the rotating arm 37,
38 rotates about the mounting shafts 35 and 36 to rotate the discharge door 25
The position of the closed state is variable, so that the interval between the second gaps H2 can be adjusted.

As described above, the second clearance H
By adjusting the interval of 2, for example, when the object to be weighed is extremely small, the interval of the second gap H2 is reduced to reliably prevent the object to be weighed from falling, or when the object to be weighed is large, By increasing the interval between the two gaps H2, it is possible to improve the discharge speed of the object to be weighed.

In the above-described embodiment, the discharge door 8
a (7a, 9a), a vertical piece 40b extending downward at the outer peripheral edge of the upper surface plate 40a, and a flange piece extending outward from a lower end of the discharge port 25 at a lower end of the vertical piece 40b. 4
0c is provided, but the vertical piece 40
Since b has the effect of preventing the object to be spilled from falling and preventing noise, a configuration having only the vertical piece 40b without the flange piece 40c as shown in FIG. 21 may be used.

Further, in the above-described embodiment, a single-opening type hopper having a single discharge door 8a (7a, 9a) that opens and closes has been described as an example, but as shown in FIG. It is also possible to apply the configuration of the present invention to a double-opening hopper having a first discharge door 100 and a second discharge door 101 facing each other. In the hopper shown in FIG.
Has a vertical piece 100b extending downward at the outer peripheral edge of the upper surface plate 100a, and a discharge port 10 is provided at the lower end of the vertical piece 100b.
A flange piece 100c extending outwardly from the lower end of 2 is provided. Further, the second discharge door 101 is provided on the upper surface plate 101a.
Has a vertical piece 101b extending downward at the outer peripheral edge of the outer peripheral edge of the discharge port 102, and a flange piece 101c extending outward from the lower end of the discharge port 102 is provided at the lower end of the vertical piece 101b. And
Each of the vertical pieces 100b and 101b forms the above-described first gap H1 between the vertical piece and the inner wall surface of the discharge port 102, and each of the flange pieces 1
00c and 101c form the above-described second gap H2 between the lower end of the outlet 102 and the second gap H2. Further, the first discharge door 100
At the open / close end portions of the first and second discharge doors 101, there are no flange pieces 100c and 101c, respectively.
The first gap H1 described above is formed between the first gap b and the first gap 101b. Further, the upper surface plate 100a of the first discharge door 100 constitutes the step portion 103 such that the height thereof is different at the open / close end facing the upper surface plate 101a of the second discharge door 101. This double-opening hopper opens either the first discharge door 100 or the second discharge door 101, and discharges the objects to be weighed in different directions.

In the double-opening hopper thus configured as well, the hanging pieces 100b and 101b prevent the object to be weighed from falling and noise. Furthermore, flange piece 1
00c and 101c prevent the object from being spilled further, and the second gap prevents noise.
Also, the step portion 103 includes the first discharge door 100 and the second discharge door 1.
01 is prevented from falling off. It should be noted that even in the case of the double-sided hopper, the flange piece 100
A configuration having only the vertical pieces 100b and 101b without the c and 101c may be employed.

[0081]

As described above, in the combination weighing device according to the first aspect of the present invention, the discharge door that opens and closes the discharge port of the hopper body extends downward at the outer peripheral edge of the plate-like upper plate. And a first gap portion is provided between the outer wall surface of the hanging piece and the inner wall surface of the discharge port of the hopper body. Accordingly, since the first gap having a height corresponding to the extension of the vertical piece is provided between the upper surface plate on which the object to be weighed and the discharge port, the object to be weighed can be prevented from falling.

Further, since the discharge door closes the discharge port through the first gap portion, there is no contact between the discharge door side and the discharge port side, so that noise related to opening and closing of the discharge door can be prevented.

The combination weighing device of the present invention has a flange piece extending outward at the lower end of the vertical piece, and between the upper wall surface of the flange piece and the lower edge of the discharge port of the hopper body. A second gap is provided. Thus, even if the object to be weighed attempts to pass through the first gap, the flange piece prevents the object from being weighed, so that even a small or thin object to be weighed can be prevented from falling. In addition, since the second gap portion is provided between the flange piece and the lower end edge of the discharge port, there is no contact between the discharge door side and the discharge port side, so that noise related to opening and closing of the discharge door can be prevented.

The second clearance is obtained by a drive mechanism that opens and closes the discharge door within a predetermined angle range and sets a closed position of the discharge door, so that the discharge door can be stably closed. As a result, the effects of preventing the object to be dropped from falling and the noise associated with opening and closing the discharge door can be more reliably implemented.

Further, by providing an adjusting mechanism for adjusting the second gap, for example, when the object to be weighed is extremely small, the interval between the second gaps is reduced to ensure that the object to be weighed falls. For example, when the object to be weighed is large, the interval between the second gaps may be increased to improve the discharge speed of the object to be weighed, and the setting according to the object to be weighed can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a combination weighing device of the present invention.

FIG. 2 is a plan view of the combination weighing device.

FIG. 3 is a side view of the combination weighing device.

FIG. 4 is a side view showing the hopper.

FIG. 5 is a plan view showing the hopper.

FIG. 6 is a partial perspective view of the hopper.

FIG. 7 is a perspective view showing a discharge door.

FIG. 8 is an exploded perspective view showing an engagement portion between the hopper and the drive mechanism.

FIG. 9 is a cross-sectional view showing a connecting portion between the rotating arm and the adjustment plate.

FIG. 10 is an explanatory view of the movement of the rotating arm and the adjustment plate by the connecting portion.

FIG. 11 is a perspective view of a drive mechanism.

FIG. 12 is a side view of the driving mechanism.

FIG. 13 is a front view of the driving mechanism.

FIG. 14 is a cross-sectional view of the driving mechanism in a side view.

FIG. 15 is a sectional view of the driving mechanism as viewed from the front.

FIG. 16 is a side view showing a state where the hopper is attached to the drive mechanism.

FIG. 17 is a partially cut front view of the same state.

FIG. 18 is a partially cut rear view of the same state.

FIG. 19 is an explanatory diagram showing an engagement relationship between a driving portion of a hopper and a driving mechanism.

FIG. 20 is an explanatory diagram showing an engagement relationship between a driving portion of a hopper and a driving mechanism.

FIG. 21 is a side view of a hopper having a discharge door provided with only vertical pieces.

FIG. 22 is a schematic perspective view showing a double-sided hopper to which the present invention is applied.

FIG. 23 is a schematic configuration diagram of a conventional combination weighing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Combination weighing apparatus, 2 ... Dispersion supply part, 7 ... Stock hopper (hopper), 8 ... Measuring hopper (hopper), 9 ... Memory hopper (hopper), 7a, 8a, 9a ...
7b, 8b, 9b: discharge door, 24: storage port, 25: discharge port, 40a: top plate, 40b: vertical piece, 40c: flange piece, H1: first clearance, H2: second clearance.

Claims (4)

[Claims] 1. A dispersion supply unit for dispersing and supplying an object to be weighed,
A plurality of hoppers for storing, weighing, and selectively dropping and discharging the objects to be weighed by a predetermined amount in the dispersion direction of the dispersion supply unit, and disposed below the hoppers, collect the discharged objects to be weighed. A combination means for collecting and weighing an object having a predetermined mass by selecting and combining a plurality of hoppers based on the weighing value, wherein each of the hoppers has a storage port opened upward and A hopper body formed in a cylindrical shape with a discharge port opened downward, and a vertical piece extending downward at an outer peripheral edge of an upper plate formed in a plate shape; A discharge door driven to open and close the discharge port while providing a first gap between the wall surface and the inner wall surface of the discharge port of the hopper body, and closing and opening the discharge port. A combination meter characterized by comprising: Apparatus. 2. The discharge door has a flange piece extending outward at a lower end of the hanging piece, and is provided between an upper wall surface of the flange piece and a lower edge of a discharge port of the hopper body. 2. The combination weighing device according to claim 1, wherein the discharge port can be closed by providing a second gap. 3. 3. The combination weighing device according to claim 2, wherein the second gap portion is obtained by a driving mechanism that opens and closes the discharge door within a predetermined angle range and sets a closed position thereof. apparatus. 4. An adjusting mechanism for adjusting a second gap between an upper wall surface of the flange piece and a lower edge of a discharge port of the hopper body. 4. The combination weighing device according to 3.