JP3495113B2 - Combination weighing device for rods - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention weighs an object to be weighed to a predetermined target weight by performing a combination calculation on the weights of the objects to be weighed respectively supplied to a plurality of weighing hoppers arranged in a circle. TECHNICAL FIELD The present invention relates to a combination weighing device, and particularly to a combination weighing device for a rod-shaped object to be weighed.

[0002]

2. Description of the Related Art In general, a combination weighing device used for weighing various articles has a plurality of troughs arranged radially around a supply portion to be weighed and arranged in a circle as a whole below the tip of each trough. As described above, each of the plurality of pool hoppers is arranged, and each of the weighing hoppers is arranged below each of the pool hoppers, and the objects to be weighed are supplied to the respective weighing hoppers from the supply section through the troughs and the pool hoppers. The weight of each of these objects is weighed, and the combination of the measured values is used to find the combination of weighing hoppers that match or are closest to the predetermined target weight. The object to be weighed having the above target weight is obtained by discharging and collecting the object to be weighed.

By the way, the object to be weighed to a target weight by this kind of combination weighing device is usually supplied to a packaging device and automatically packaged. If it is a rod, it may be required to supply it to the packaging device in a state of being aligned in a predetermined direction.

In this case, in the combination weighing device in which the pool hopper and the weighing hopper are circularly arranged around the supply section as described above, the pool hopper or the weighing hopper is covered with the trough from the central supply section. It becomes difficult to disperse and supply the objects to be weighed in an aligned state, and even if the weighing hoppers can be supplied in an aligned state, the objects to be weighed discharged from multiple weighing hoppers are in an aligned state. It is difficult to maintain and aggregate.

As a means for dealing with this kind of problem, for example, according to Japanese Patent Publication No. 3-60049, a distributed supply route of an object to be weighed from a supply hopper to a plurality of small-scale and large-scale weighing hoppers, And arranging the collective carry-out route of the objects to be weighed discharged from these hoppers on the same vertical plane,
If a long object to be weighed is supplied to the supply hopper in a direction orthogonal to the vertical plane, the attitude is maintained and these objects are weighed or gathered. A metering device is disclosed.

[0006]

However, in the case of the weighing device disclosed in the above publication, a feeding hopper, a plurality of weighing hoppers, and various troughs, chutes and chute which form a distributed feeding path of the objects to be weighed between them. In order to improve the weighing accuracy, all components such as the pool hopper and the various chutes and unloading conveyors that make up the collective unloading route of the objects discharged from the weighing hopper are arranged on the same vertical plane. In addition, when the number of weighing hoppers is increased, there is a drawback that the entire apparatus becomes larger than that in which the weighing hoppers are arranged in a circle.

Therefore, according to the present invention, in a combination weighing device in which the weighing hoppers are arranged in a circular shape so as to be compact as a whole, long or rod-like objects to be weighed can be collected and discharged in an aligned state. The task is to

[0008]

In order to solve the above problems, the present invention is characterized by having the following configuration.

[0009]

First, the invention according to claim 1 of the present application (hereinafter
In the following, the first invention), the rod-shaped object to be weighed is distributed and supplied from the supply unit to a plurality of circularly arranged weighing hoppers through troughs to measure the weight,
A combination calculation is performed based on the weighing values obtained by each weighing hopper, and the objects to be weighed are discharged from the weighing hoppers that correspond to the combination where the added value of the combination is the target weight or a value close to this, and a substantially conical shape In a rod-like object combination weighing device adapted to be gathered through a gathering chute, the width of each trough radially arranged around the supply section is transferred in a posture in which the object to be weighed is oriented with its longitudinal direction in the traveling direction. As described above, the length of the object to be weighed is made narrower, and the auxiliary hopper is inserted into the inside of the weighing hopper so that the internal space has a shape in which the object to be weighed is accommodated in a portrait orientation, and A guide chute that slides down the objects to be weighed discharged from each weighing hopper in a posture in which the longitudinal direction is the traveling direction is arranged for each weighing hopper between the collecting chutes and the collecting chutes. Characterized in that the objects to be weighed to the outlet below the bets with a cylindrical collecting hoppers to accommodate in a portrait orientation.

[0011]

[0012] The invention according to claim 2 (hereinafter, the second
(Invention), in the above-mentioned first invention, a partition wall for preventing the object to be weighed from straddling an adjacent trough is provided at a side portion of the radially arranged trough. And

The invention according to claim 3 (hereinafter,
In the same manner as in the first invention, an inclined surface is provided at the tip of the trough so that the object to be weighed can be dropped while maintaining the posture in which the longitudinal direction is the traveling direction. To do.

[0014]

[0015]

According to the above structure, any one of the first to third inventions is provided.
Also , the troughs arranged radially between the supply section and the weighing hoppers around the feeding section move the object to be weighed in the longitudinal direction.
It acts as an aligning unit that aligns it in the posture in the direction of travel, and the objects to be weighed that are aligned by this are stored in the weighing hopper in a vertically long posture while being maintained in the aligned state, and are discharged from each weighing hopper. The object to be weighed is introduced into the collecting chute while maintaining the above-mentioned aligned state by the guide chute.

Then, the objects to be weighed introduced from the plurality of guide chutes into the collecting chute are slid and collected along the substantially conical inner surface of the chute, and in that case, each guide is guided. Since they are introduced from the chute in the aligned state as described above, they are assembled in that state and accommodated in the collecting hopper arranged below the discharge port of the collecting chute in a vertically long posture. Therefore, the objects to be weighed are supplied in an aligned state from the collecting hopper to the packaging device.

Further , by inserting an auxiliary hopper into the inside of the weighing hopper, the internal space has a shape for accommodating the object to be weighed in a vertically long posture, so that the object to be weighed is not a rod-shaped object or it is not necessary to align it. When handling the objects to be weighed, by removing the auxiliary hopper, the weighing device can be used for these objects to be weighed.

Further, according to the second aspect of the invention, since the partition wall that prevents the object to be weighed from straddling between the troughs that are adjacent to the lateral sides of the radially arranged troughs is provided, The objects to be weighed are introduced from the supply unit to the trough with the longitudinal direction of the objects being oriented in the transfer direction. Therefore, the aligning action of the trough with respect to the objects to be weighed can be more effectively obtained.

Further, according to the third aspect of the invention, since the inclined surface is provided at the tip of the trough, the objects to be weighed that have been transferred horizontally by the trough are located below the tip of the trough. (Pool hopper if a pool hopper is installed between the trough and the weighing hopper)
When it is dropped into, it is dropped while maintaining the aligned state with the longitudinal direction oriented in the traveling direction.

[0020]

EXAMPLES Examples of the present invention will be described below.

First, referring to FIG. 1, a schematic structure of a combination weighing device to which the present embodiment is applied will be described. In this combination weighing device 1, a pedestal 4 is provided above a central portion of a main body 2 through columns 3 ... Is installed, the upper center of the gantry 4 is a supply unit 5 for the object to be weighed, the peripheral part of the gantry 4 is a weighing unit 6, and the lower part of the gantry 4 is a collecting unit 7.

The supply unit 5 has a vibrating unit 1 in the center of the gantry 4.
1 and a dispersion table 12 and a plurality of troughs 14 ... 14 radially arranged around the dispersion table 12 via vibrators 13 ... 13, respectively.

Further, the measuring unit 6 includes the troughs 14
A plurality of pool hoppers 15 arranged in a circular shape so as to be respectively located below the front end of the pool 14, and a weighing hopper 16 arranged in a circular shape so as to be located below the pool hoppers 15 And a gate opening / closing device 17 ... 17 provided for each pair of a pool hopper 15 and a weighing hopper 16 which are paired up and down.

The gate opening / closing devices 17 ... 1
7 is attached around the gantry 4, and each of the opening / closing devices 17 includes the pool hopper 15 and the weighing hopper 16.
Are each supported.

Further, the collecting unit 7 is provided in each weighing hopper 1
Guide chutes 18 ... 18 which are respectively arranged below 6 ... 16 and which guide the objects to be weighed discharged from these weighing hoppers 16 ... 16 arranged in a circle to the center of the circle.
And a collecting chute 19 that is arranged below the tips of these guide chutes 18 ...
The collecting chute 19 is composed of a collecting hopper 20 disposed below the discharge port at the lower end where the diameter of the collecting chute 19 is reduced, a shutter 21 for opening and closing an opening at the lower end of the collecting hopper 20, a cylinder 22 for driving the same, and the like. ing.

The timing hopper 2 is provided below the shutter 21 which opens and closes the opening at the lower end of the collecting hopper 20.
3, a shutter 24 that opens and closes an opening at the lower end thereof and a cylinder 25 for driving the shutter 24 are provided, and below the shutter 24 for the timing hopper, an object-conveying device 26 for a packaging device is arranged. Has been done.

Next, among the above-mentioned constituent elements, the constituent elements of the characteristic part of the present invention will be described in more detail.

First, as shown in FIGS. 2 to 4, each of the troughs 14 constituting the supply unit 5 for the object to be weighed transfers the object to be weighed by the bottom surface 14a and the inclined side surfaces 14b, 14b on both sides thereof. The bottom surface 14a has a path to be formed.
3 is sufficiently narrower than the length of the object to be weighed X shown by the chain line in FIG. 3, and the object to be weighed X is accommodated in a posture in which its longitudinal direction is oriented in the transfer direction.

In the trough 14, an inclined surface 14c is provided at the tip of the bottom surface, and when the object X to be weighed is dropped on the pool hopper 15, the posture in which the longitudinal direction is the transfer direction is set. Is being maintained.

The top of the folded portion 14d provided on the upper side of the one side surface 14b and engaged with the upper end of the side surface 14b of the adjacent trough 14 is separated from the adjacent trough 14 by being separated from the adjacent trough 14. A partition wall 14e is provided upright to prevent the weighing object X from straddling the adjacent troughs 14, 14.

On the other hand, as shown in FIGS. 5 and 6, the pool hopper 15 into which the object X is fed from the trough 14 is a hopper body 15a having upper and lower ends opened and an opening at the lower end of the body 15a. A pair of gates 15b for opening and closing the section,
15b and a link mechanism (see FIG. 1) 15c for opening and closing the gates 15b, 15b by the gate opening / closing device 17 shown in FIG. 1, and the auxiliary hopper 31 can be attached and detached in the pool hopper 15. Has been inserted into.

The auxiliary hopper 31 substantially narrows the cross-sectional area of the space for containing the object X to be weighed dropped from the trough 14, and is vertically long with a substantially rectangular cross section whose upper and lower sides are opened by four peripheral surfaces. It is the one that forms the space.
In the drawing, engaging members 31a and 31b that are engaged with the upper ends of the left and right surfaces of the hopper body 15a of the pool hopper 15 are provided at the upper ends of the left and right surfaces, and the upper and lower surfaces of the front and rear surfaces are similarly provided with hoppers. Positioning members 31c and 31d that come into contact with the insides of the front and rear surfaces of the main body 15a are respectively provided, and these are held in the hopper main body 15a with a gap provided between the main body 15a and the main body 15a.

Further, the weighing hopper 16 has substantially the same structure as the pool hopper 15, and as shown in FIGS. 7 and 8, a hopper body 16a, a gate 16b for opening and closing an opening at the lower end of the body 16a, Link mechanism (see FIG. 1) 16 for opening and closing the gate 16b by the gate opening / closing device 17
The auxiliary hopper 32 is removably inserted into the weighing hopper 16 as well.

The auxiliary hopper 32, like the auxiliary hopper 31 in the pool hopper 15, substantially reduces the cross-sectional area of the space for accommodating the objects to be weighed dropped from the pool hopper 15. It is configured to form a vertically long space having a substantially rectangular cross section whose upper and lower sides are opened by four peripheral surfaces, and the left and right surfaces of the hopper body 16a of the weighing hopper 16 are provided at the upper ends of the left and right surfaces in the drawing. The engaging members 32a and 32b engaged with the upper ends of the hoppers are provided with the positioning members 32c and 32d, respectively, which are in contact with the insides of the front and rear surfaces of the hopper body 16a at the upper portions of the front and rear surfaces. A space is provided between the main body 16a and the main body 16a so as to be held.

Incidentally, the auxiliary hopper 3 in this embodiment
In 1 and 32, the openings 31e are formed on the four surrounding surfaces, respectively.
... 31e, 32e ... 32e are formed, and synthetic resin sheets 31f, 32 having flexibility on the entire inner surface
f is attached.

Further, the guide chute 18 on which the object X to be weighed is dropped from the weighing hopper 16 is detachably supported on the weighing device main body 2 via the bracket 33, and as shown in FIGS. 9 and 10. A configuration in which the side surfaces 18b, 18b are provided on both sides of the inclined bottom surface 18a, the width of which is narrower than the length of the object to be weighed X, and the object X to be weighed has its longitudinal direction oriented in the longitudinal direction of the chute 18. It slides down inside the chute 18.

In this embodiment, upper and lower two-stage gates 34 and 35 are provided in each guide chute 18,
Among them, the upper gate 34 is opened / closed by a solenoid 36 provided for each gate 34, and the lower gate 35 is opened / closed by a common lifting cylinder 37 via a link mechanism 38.

Further, these guide chutes 18 ... 18
As shown in FIG. 1, the collecting chute 19 onto which the objects to be weighed are dropped has a shape in which the longitudinal cross-sectional shape of the peripheral surface is smoothly continuous from an oblique straight line portion to a parabolic portion.

According to the above configuration, the object to be weighed is the pedestal 4
14 arranged radially on the dispersion table 12 in the upper central part of the feeding trough 14 and pool hoppers 15 arranged respectively below the tips of these troughs 14 ... 16 ... 16 while being distributed and supplied to these weighing hoppers 16 ... 16
A combination calculation is performed on the weight value of the object to be weighed obtained in step 1, and the optimum combination whose combined addition value is the target weight or a value closest thereto is selected.

The gates 16b ... 16b of the weighing hoppers 16 ... 16 corresponding to the optimum combination are the gate opening / closing devices 1.
When opened by 7 ... 17, the objects to be weighed are discharged from these weighing hoppers 16 ... 16 and are collected in the collecting hopper 20 via the guide chutes 18 ... 18 and the collecting chute 19 and at the same time, the collecting hopper 20. When the shutter 21 below is opened, it is further introduced into the timing hopper 23, and when the shutter 24 below is opened, it is delivered to the conveying device 26 to the packaging device. In this way, the object to be weighed to the target weight or a weight close to the target weight is automatically and continuously supplied to the packaging device at a predetermined timing.

Particularly, according to the weighing device 1, when the objects to be weighed are rod-shaped, they are supplied to the packaging device in an aligned state.

That is, since the width of each of the troughs 14 constituting the supply section 5 is sufficiently narrower than the length of the object to be weighed, the object to be weighed is oriented with its longitudinal direction oriented in the transfer direction. It will be stored in and transferred while maintaining its posture. In that case, the adjacent trough 1 is provided at the top of the folded portion 14d on the one side surface 14b of each trough 14.
Since the partition wall 14e for partitioning between the 4 and 4 is erected, it is prevented that the object to be weighed straddles between the adjacent troughs 14 and 14 and the posture described above is surely provided in each trough 14. And will be housed.

Further, since the inclined surface 14c is provided at the tip of the bottom surface of the trough 14, the objects to be weighed aligned in the above-described posture maintain that posture, and the tip in the longitudinal direction is maintained. Will be dropped into the pool hopper 15.

An auxiliary hopper 31 is inserted into the pool hopper 15 so that the space for accommodating the objects to be weighed is substantially narrowed to form a vertically long space having a substantially rectangular cross section. Since the objects to be weighed are put into the inside of the trough 14 from the inclined surface 14c at the tip of the trough 14, the one end in the longitudinal direction is the leading end, and these objects to be weighed are accommodated in the auxiliary hopper 31 in a vertically long posture. Will be. Further, since the similar auxiliary hopper 32 is also inserted into the weighing hopper 16, the objects to be weighed from the pool hopper 15 into the weighing hopper 16 are also stored in the auxiliary hopper 32 inside the weighing hopper 16. It will be housed in a portrait orientation.

Here, the auxiliary hoppers 31 and 32 inserted into the pool hopper 15 and the weighing hopper 16, respectively.
Are openings 31e ... 31e, 32e on the four surrounding surfaces, respectively.
32e is formed, and the synthetic resin sheets 31f and 32f having flexibility are attached to the entire inner surface of the auxiliary hoppers 31 and 32.
Even if it collides with the inner surface when it is thrown into the inside, the impact at the time of the collision is mitigated, and damage to the object to be weighed is prevented.

When the objects to be weighed are discharged from the respective weighing hoppers 16 ... 16, the objects to be weighed are auxiliary hoppers 32 ... 32 of the respective weighing hoppers 16 ... 16 as described above.
Since it is accommodated in a vertically long posture inside, it falls onto the lower guide chutes 18 ... 18 in the vertically long posture, but these guide chutes 18 ... 18 have a width narrower than the length of the object to be weighed. Therefore, the object to be weighed slides down inside the chutes 18 ... 18 while maintaining the vertically long posture, that is, with the longitudinal direction of the chutes 18 ... 18.

Further, the weighing hoppers 16 arranged in a circle
The object to be weighed that slides from the guide chute 18 toward the center of the circular shape through each of the guide chutes 18 is introduced into the upwardly opening collecting chute 19 and the lower end along the inner surface of the collecting chute 19. It will slide down to the narrowed outlet. In that case, since the longitudinal cross-sectional shape of the peripheral surface of the collecting chute 19 is a shape that smoothly continues from the oblique straight line portion to the parabolic portion, the object to be weighed has its longitudinal direction oriented in the sliding direction. While maintaining a good posture, it smoothly transitions from a tilted state to a vertical state. Then, in this state, the objects to be weighed introduced from the guide chutes 18 ... 18 are gathered, the whole is aligned in a vertically long posture, and is introduced into the gathering hopper 20 from the discharge port.

Further, since the collecting hopper 20 is also in the vertically long cylindrical shape, the objects to be weighed in this collecting hopper 20 are maintained in the vertically long posture and are aligned when the shutter 21 is opened. Introduced to the timing hopper 23,
Further, when the shutter 24 is opened, it is transferred to the conveying device 26 to the packaging device in the same state of being aligned in the vertically long posture, and thus the rod-shaped object to be weighed to a predetermined weight changes its posture. It is supplied to the packaging device in an aligned state.

In this embodiment, since the upper and lower gates 34 and 35 are provided in each of the guide chutes 18, the objects to be weighed dropped from the weighing hopper 16 into the guide chutes 18 are First, the upper gate 34 temporarily stores the upper portion of the guide chute 18, and the lower gate 35 opens to discharge the objects to be weighed stored in the lower portion of each guide chute 18 at the time of the previous weighing. When the upper gate 34 is opened after the lower gate 35 is closed, the objects to be weighed are slid down to the position of the lower gate 35 and are again stored under the respective guide chutes 18. And after that, the lower gate 3
When 5 is opened, it is dropped into the collecting chute 19, is collected by the chute 19 and is then introduced into the collecting hopper 20.

That is, the object to be weighed is the weighing hopper 1 at a high place.
The route from 6 to the collecting hopper 20 at a low place is divided into a plurality of times to be dropped. As a result, the posture is disturbed during the fall and the objects to be weighed due to being vigorously introduced into the collecting hopper 20. Damage etc. will be avoided.

[0051]

[0052]

As described above, the combination weighing device according to the present invention
According to U.S.A., the troughs arranged radially around the supply section show the posture of the object to be weighed with its longitudinal direction oriented in the traveling direction.
The objects to be weighed that are aligned by the force are stored in the weighing hopper in a vertically long posture while maintaining the aligned state, and the objects to be weighed discharged from each weighing hopper are The guide chute maintains the above-described aligned state and introduces the collected chute into the collecting chute. Further, the collecting chute maintains the aligned condition and collects and stores the collected hopper in a vertically long posture. As a result, the objects to be weighed are supplied in an aligned state from the weighing device to the packaging device.

[0053] In addition, by removably inserting the auxiliary hopper to the weighing hopper, it is so arranged to accommodate the objects to be weighed in the portrait orientation, the objects to be weighed need to be not or aligned the sticks If not, the auxiliary hopper can be removed to use these objects to be weighed, and the versatility of the weighing device can be improved.

Further, according to the second aspect of the invention, since the partition wall for preventing the object to be weighed from straddling between the troughs adjacent to the lateral sides of the troughs arranged radially, the object to be weighed is provided. The article is introduced from the supply section to the trough with the longitudinal direction thereof oriented in the transfer direction. Further, according to the third aspect of the invention, the inclined surface is provided at the tip of the trough. When the objects to be weighed are dropped onto the lower hopper, the alignment state is maintained, and in this way, the alignment action on the objects to be weighed is improved.

[Brief description of drawings]

FIG. 1 is a schematic view of a combination weighing device to which an embodiment of the present invention is applied.

FIG. 2 is a side view of a trough in the weighing device.

FIG. 3 is a plan view of the trough.

FIG. 4 is a front view of the trough taken along the line aa in FIG.

FIG. 5 is a side view of a pool hopper in the weighing device.

FIG. 6 is a plan view of the hopper taken along the line bb of FIG.

FIG. 7 is a side view of a weighing hopper in the weighing device.

8 is a plan view of the hopper taken along the line cc of FIG. 7. FIG.

FIG. 9 is a side view of a guide chute in the weighing device.

FIG. 10 is a plan view of the chute.

[Explanation of symbols]

1 Combination weighing device 5 supply section 6 Weighing department 7 Meeting department 14 troughs 16 Weighing hopper 18 Guide shoot 19 Collective shoot 20 Assembly hopper 32 Auxiliary hopper

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01G 19/387

Claims (3)

(57) [Claims] 1. A rod-shaped object to be weighed is dispersedly supplied from a supply unit to a plurality of weighing hoppers arranged in a circle around the feeding unit through troughs to weigh the weight, and the weighing obtained by each weighing hopper. The combination calculation is performed based on the value, and the object to be weighed is discharged from the weighing hopper corresponding to the combination in which the added value of the combination is the target weight or a value close to the target weight,
A combination weighing device for rod-shaped objects, wherein the troughs radially arranged around the supply part have a width in which the objects to be weighed move in the longitudinal direction. The shape is narrower than the length of the object to be weighed so that it can be transferred in a posture in which the internal space accommodates the object in a vertically long position by inserting the auxiliary hopper into the weighing hopper. And, between each weighing hopper and the collecting chute, a guide chute that slides down the object to be weighed discharged from each weighing hopper in a posture in which the longitudinal direction is the traveling direction is arranged for each weighing hopper,
A combination weighing device for rod-shaped objects, further comprising a cylindrical collecting hopper for accommodating the objects to be weighed in a vertically long position below the discharge port of the collecting chute. 2. The sides of the troughs arranged in a radial pattern,
Claim 1, characterized in that the partition wall be weighed prevents straddle between the adjacent troughs are projected
The combination weighing device for rod-shaped articles as described in. 3. The object to be weighed is dropped onto the tip of the trough while maintaining a posture in which the longitudinal direction is directed in the traveling direction.
The combination weighing device for a rod-shaped article according to claim 1 , wherein an inclined surface is provided.