JP2019060875A - Combination weighing apparatus - Google Patents

Abstract

To provide a combination balance that can suppress a load acting on a vibration unit even when size of a dispersion table is enlarged.SOLUTION: A combination balance comprises: a dispersion table that radially disperses an article put in from above; and a vibration unit 9 that gives vibration to the dispersion table in a vertical direction. The vibration unit 9 comprises: a plurality of vibration parts 91, 92; a mounting fitting 96 for mounting the dispersion table; a movable part 93 that gives the vibration of the plurality of vibration parts to the mounting fitting; and a weight 97 that is provided between the plurality of vibration parts. The at least one vibration part comprises: electromagnets 91c, 92c and armatures 91d, 92d being close to or away from each other in a vertical direction; and first leaf springs 94, 95 that extend in a vertical direction to be moved upward and downward by the electromagnet and the armature and that are coupled to the movable part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a combination balance.

  Patent Document 1 listed below discloses an example of the combination balance. The combination weighing device described in Patent Document 1 includes a dispersion table for dispersing articles input from above radially, and a vibration unit that vibrates the dispersion table in the circumferential direction.

Patent No. 5095477

  In the combination weighing device, the articles on the dispersion table are advanced (rotated) in the circumferential direction to disperse the articles radially, thereby supplying the articles to a plurality of supply hoppers disposed around the dispersion table. Do.

  Here, in the combination weighing apparatus as described above, in order to increase the number of supply hoppers, the dispersion table may be enlarged.

  However, by increasing the driving force of the vibration unit for vibrating the dispersion table in the circumferential direction in accordance with the increase in size of the dispersion table, the load acting on the vibration unit is increased, causing failure or damage, etc. May cause problems.

  An object of the present invention is to provide a combination balance capable of suppressing the load acting on the vibration unit even when the size of the dispersion table is increased in order to solve the above-mentioned problems.

  The combination weigher according to the present invention includes a dispersion table for dispersing articles input from above radially and a vibration unit for applying vertical vibration to the dispersion table, the dispersion table including a table main body, and a wall And the table main body has a discharge area for discharging the articles and a non-discharge area for not discharging the articles, and the vibration unit has a plurality of vibration sections disposed to face each other in the horizontal direction. .

  According to the above configuration, since the vibration in the circumferential direction is not applied to the dispersion table, even when the size of the dispersion table is increased, the load acting on the vibration unit can be suppressed.

  According to the present invention, it is possible to provide a combination balance capable of suppressing the load acting on the vibration unit even when the size of the dispersion table is increased.

Schematic which shows the structure of the combination balance which is embodiment of this invention. The perspective view of a dispersion | distribution table. (A) of FIG. 3 is a schematic plan view of the dispersion table, and (b) of FIG. 3 is a side view of the dispersion table as viewed from the direction of arrow X in (a) of FIG. The schematic side view which shows the structure of a vibration unit. The schematic plan view which shows the structure of a vibration unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same parts or corresponding parts are denoted by the same reference numerals.

  The schematic configuration of a combination weigher 100 according to an embodiment of the present invention will be described with reference to FIGS. The combination weigher 100 is, for example, a device for weighing an article such as a snack and discharging it at a predetermined weight.

  As shown in FIG. 1, the combination weigher 100 includes a center base 1, a dispersion table 2, a rectilinear feeder 3, a supply hopper 4, a weighing hopper 5, a weight sensor 6, a collecting chute 7, a collecting funnel 8, a vibrating unit 9 and the like. Have. Here, as is well known, the combination weigher 100 also includes various other devices (a control device, a power supply device, etc.), but since it is not relevant to the present invention, the illustration and the description will be omitted.

  The center substrate 1 is disposed at the center in the width direction of the combination weigher 100. The dispersion table 2 is provided on the top of the center base 1. A plurality of guide portions 2a are formed at the peripheral portion of the dispersion table 2 (see FIG. 2).

  The rectilinear feeders 3 are respectively provided at positions (positions facing the respective guiding portions 2 a) corresponding to the respective guiding portions 2 a of the dispersion table 2. The feed hoppers 4 are provided at positions corresponding to the respective rectilinear feeders 3 (positions facing the respective rectilinear feeders 3). The weighing hoppers 5 are provided at positions corresponding to the respective feeding hoppers 4 (positions on the lower side of the respective feeding hoppers 4). The weight sensor 6 is attached to each weighing hopper 5. The rectilinear feeders 3, the supply hoppers 4, and the weighing hoppers 5 are radially disposed at the peripheral portion of the dispersion table 2.

  The collecting chute 7 is provided below the weighing hoppers 5 arranged radially. The collecting funnel 8 is provided below the collecting chute 7.

The operation of the combination weigher 100 will be described with reference to FIG.
The dispersion table 2 sends out an article supplied from an external supply device (not shown) to the central portion of the dispersion table 2 toward the periphery by vibration.

  Each straight feeding feeder 3 feeds articles fed from each guide portion 2 a of the dispersion table 2 to each feeding hopper 4 by vibration. Each feed hopper 4 receives an article fed from each rectilinear feeder 3. Further, when each weighing hopper 5 disposed below is emptied, each feeding hopper 4 opens a discharge gate (not shown) provided to the feeding hopper 4 and inserts an article into the weighing hopper 5.

  Each weighing hopper 5 receives the articles fed from each feeding hopper 4. Each weight sensor 6 measures the weight of an item in each weighing hopper 5 and outputs the measured value to a control device (not shown).

  Further, when each weighing hopper 5 is selected as a discharge combination of a predetermined weight by a control device (not shown), the discharge gate (not shown) provided to the weighing hopper 5 is opened to collect the articles to the collecting chute 7 Throw in The articles fed to the collecting chute 7 slide down on the collecting chute 7 and are discharged to a packaging machine or the like through the collecting funnel 8.

The schematic configuration of the distribution table 2 will be described with reference to FIGS. 2 and 3.
As shown in FIGS. 2 and 3 (b), the dispersion table 2 is formed in a substantially conical shape.

  The dispersion table 2 has a table main body 21 and a wall portion 22. The table main body 21 has a first surface 21a, a second surface 21b, and a third surface 21c.

  The first surface 21a includes a first boundary line 2c and a second boundary line 2d extending downward from the center point 2b (apex) toward the peripheral portion of the dispersion table 2, and an arc 2e centered on the center point 2b. It is a substantially fan-shaped area enclosed (see FIG. 3A).

  The second surface 21 b includes a first boundary line 2 c, a ridge line 2 f extending horizontally from the center point 2 b toward the wall 22, and a third boundary 2 g which is a boundary between the table main body 21 and the wall 22. It is a substantially triangular area to be enclosed (see FIG. 3A).

  The third surface 21c is a substantially triangular area surrounded by the second boundary 2d, the ridge line 2f, and the fourth boundary 2h which is the boundary between the table main body 21 and the wall portion 22 (FIG. 3 (a)) reference).

  Among the peripheral parts of the table main body 21, the side where the wall 22 is not provided is a discharge area where the article is discharged, and the side where the wall 22 is provided is a non-discharge area where the article is not discharged.

  The first surface 21 a inclines downward from the center point 2 b toward the guides 2 a of the dispersion table 2. The second surface 21b inclines downward from the ridgeline 2f toward the first boundary 2c. The third surface 21c inclines downward from the ridgeline 2f toward the second boundary 2d.

  According to the above configuration, the second surface 21b has a larger inclination angle than the first surface 21a. In addition, the third surface 21c has an inclination angle larger than that of the first surface 21a.

The schematic configuration of the vibration unit 9 will be described with reference to FIGS. 4 and 5.
As shown in FIGS. 4 and 5, the vibrating unit 9 includes a pair of vibrating portions 91 and 92, a movable portion 93, a pair of plate springs 94 and 95, a mounting fitting 96, and a pair of weights 97.

  The vibrating portion 91 includes a fixed frame 91a, a movable frame 91b, an electromagnet 91c, an armature 91d, two plate springs 91e and 91f, and six plate spring presses 91p to 91u.

  The fixed frame 91a is formed of a substantially trapezoidal block body. The movable frame 91 b is formed of a substantially U-shaped block body.

  The electromagnet 91 c is attached to the inner wall of the fixed frame 91 a. The armature 91 d is attached to the upper inner wall of the movable frame 91 b.

  The two plate springs 91e and 91f are respectively provided to straddle the fixed frame 91a and the movable frame 91b. Specifically, one end side of the plate spring 91e is fixed to the fixed frame 91a in a state of being held between the upper surface of the fixed frame 91a and the plate spring presser 91p. The other end side of the plate spring 91e is fixed to the movable frame 91b in a state of being sandwiched by the upper surface of the movable frame 91b and the plate spring presser 91q.

  One end side of the plate spring 91f is fixed to the fixed frame 91a in a state of being held between the lower surface of the fixed frame 91a and the plate spring presser 91r. The other end side of the plate spring 91f is fixed to the movable frame 91b in a state of being held between the lower surface of the movable frame 91b and the plate spring presser 91s.

  The vibrating portion 92 includes a fixed frame 92a, a movable frame 92b, an electromagnet 92c, an armature 92d, two plate springs 92e and 92f, and six plate spring retainers 92p to 92u.

  The fixed frame 92a is composed of a substantially trapezoidal block body. The movable frame 92b is formed of a substantially U-shaped block body.

  The electromagnet 92c is attached to the inner wall of the fixed frame 92a. The armature 92d is attached to the upper inner wall of the movable frame 92b.

  The two plate springs 92e and 92f are respectively provided across the fixed frame 92a and the movable frame 92b. Specifically, one end side of the plate spring 92e is fixed to the fixed frame 92a while being held between the upper surface of the fixed frame 92a and the plate spring presser 92p. The other end side of the plate spring 92e is fixed to the movable frame 92b in a state of being held between the upper surface of the movable frame 92b and the plate spring presser 92q.

  One end side of the plate spring 92f is fixed to the fixed frame 92a in a state of being held between the lower surface of the fixed frame 92a and the plate spring presser 92r. The other end side of the plate spring 92f is fixed to the movable frame 92b in a state of being held between the lower surface of the movable frame 92b and the plate spring presser 92s.

  The movable portion 93 has a mounting frame 93a and two plate spring retainers 93b and 93c.

  The plate spring 94 is provided across the movable frame 91 b and the movable portion 93. Specifically, the lower end side of the plate spring 94 is held by a plate spring presser 91t fixed to the outer wall surface of the movable frame 91b and a plate spring presser 91u provided opposite to the plate spring presser 91t. In the state, it is fixed to the movable frame 91b. The upper end side of the plate spring 94 is fixed to the mounting frame 93 a in a state of being held between the outer wall surface of the mounting frame 93 a of the movable portion 93 and the plate spring presser 93 b.

  The leaf spring 95 is provided across the movable frame 92 b and the movable portion 93. Specifically, the lower end side of the plate spring 95 is held by a plate spring presser 92t fixed to the outer wall surface of the movable frame 92b and a plate spring presser 92u provided opposite to the plate spring presser 92t. In the state, it is fixed to the movable frame 92b. The upper end side of the plate spring 95 is fixed to the mounting frame 93 a in a state of being held between the outer wall surface of the mounting frame 93 a of the movable portion 93 and the plate spring presser 93 c.

  The mounting bracket 96 is provided on the upper surface of the mounting frame 93 a of the movable portion 93. The dispersion table 2 is attached to the mounting bracket 96.

  The weight 97 is provided across the fixed frame 91 a of the vibrating portion 91 and the fixed frame 92 a of the vibrating portion 92.

The operation of the vibration unit 9 will be described with reference to FIG.
When the electromagnet 91c of the vibration unit 91 is driven, the armature 91d is attracted to the electromagnet 91c, the movable frame 91b moves downward, and the two plate springs 91e and 91f bend downward. When the two plate springs 91e and 91f bend downward, the movable frame 91b moves in parallel downward with respect to the fixed frame 91a.

  Similarly, when the electromagnet 92c of the vibration unit 92 is driven, the armature 92d is attracted to the electromagnet 92c, the movable frame 92b moves downward, and the two plate springs 92e and 92f bend downward. When the two plate springs 92e and 92f bend downward, the movable frame 92b moves in parallel downward with respect to the fixed frame 92a.

  Here, the pair of vibration units 91 and 92 vibrate in the same direction in synchronization with each other under the control of the control device (not shown). Therefore, when the electromagnets 91 c and 92 c are driven, the movable frames 91 b and 92 b move downward and move away from each other as described above (perform so-called arc movement).

  Along with this, the pair of leaf springs 94 and 95 attached to the movable frames 91 b and 92 b move downward. As a result, the mounting bracket 96 also moves downward. At this time, since the separation between the movable frames 91b and 92b is absorbed by the pair of leaf springs 94 and 95 being bent outward, the mounting bracket 96 moves only downward. Then, by repeatedly turning on and off the drive of the electromagnets 91 c and 92 c, the mounting bracket 96 vibrates up and down together with the dispersion table 2.

  The articles introduced to the central portion of the dispersion table 2 from above the dispersion table 2 by the dispersion table 2 and the vibration unit 9 configured as described above go down the first surface 21 a and a plurality of supply hoppers 4 Move towards At this time, since the vibration in the vertical direction is applied by the vibration unit 9 to the dispersion table 2, the articles on the dispersion table 2 are dispersed radially.

  Further, since the inclination angle of the second surface 21b and the inclination angle of the third surface 21c are larger than the inclination angle of the first surface 21a, the article positioned on the wall portion 22 side is the second surface 21b and the third surface 21c. Go down and move to the first surface 21a.

  As described above, according to the present embodiment, since the dispersion table 2 vibrates in the vertical direction by the vibration unit 9 having the pair of vibration portions 91 and 92, even if the size of the dispersion table 2 is increased, the vibration unit The load acting on 9 can be suppressed, so that failure or damage of the vibration unit 9 can be prevented.

  Further, in the present embodiment, when the movable frames 91 b and 92 b move downward and move away from each other (so-called arc movement is performed), the movable frames 91 b and 92 b are separated from each other by the pair of leaf springs 94. , 95, so that only vibration in the vertical direction is transmitted to the mounting bracket 96. As a result, only the vibration in the vertical direction is transmitted to the dispersion table 2, so that the dispersion deviation of the article due to the fluctuation of the vibration is made as compared with the case of the vibration unit comprising one vibration portion vibrating in the vertical direction. It can be suppressed.

  Further, in the present embodiment, since the table main body 21 of the dispersion table 2 has the second surface 21 b and the third surface 21 c having an inclination angle larger than the inclination angle of the first surface 21 a on the wall 22 side, the wall It is possible to suppress the retention of articles on the part 22 side.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning.

  In the said embodiment, although the ridgeline 2f in the dispersion | distribution table 2 is extended in the horizontal direction, it is not limited to this. That is, as long as the second surface 21b and the third surface 21c extending from the ridge line 2f are inclined downward and the contact portion with the wall 22 is inclined downward, the angle of the ridge line 2f is not particularly limited. Therefore, it may be inclined upward or downward.

  Also, the ridge line 2 f may not be clear, and may be, for example, a line extending along the top of a curved surface.

  The first surface 21a, the second surface 21b, and the third surface 21c may not be flat surfaces, and may be curved surfaces as long as they are inclined downward. Furthermore, each of the first surface 21a, the second surface 21b, and the third surface 21c may be a combination of a plurality of flat surfaces or curved surfaces, instead of one surface.

  Moreover, in the said embodiment, although the 3rd boundary line 2g and the 4th boundary line 2h are each a straight line, it is not limited to this, You may be comprised with a curve. In accordance with this, the wall portion 22 can also be formed in a curved shape.

  In the above embodiment, two combination balances 100 are adjacent to each other so that the wall portions 22 (non-discharge area) provided on the dispersion table 2 face each other, and one combination balance device having two combination balances 100 is provided. It may be configured.

  The combination balance according to the present invention can also be applied to articles other than food.

DESCRIPTION OF SYMBOLS 2 dispersion | distribution table 21a 1st surface 21b 2nd surface 21c 3rd surface 22 wall part 9 vibration unit 91, 92 vibration part 91a, 92a fixed frame 91b, 92b movable frame 91c, 92c electromagnet 91d, 92d armature 91e, 92e leaf spring 91f , 92f leaf spring 93 movable part 94, 95 leaf spring 96 mounting bracket 100 combination balance

Claims (4)

A distribution table for distributing articles radially input from above;
A vibration unit that applies vibration in the vertical direction to the dispersion table;
Equipped with
The vibration unit is
With multiple vibrators,
A mounting bracket for mounting the dispersion table;
A movable portion that applies vibration of the plurality of vibration portions to the mounting bracket;
A weight provided straddling between the plurality of vibrators;
Equipped with
At least one of the vibrators is
Electromagnets and armatures that are closely spaced in the vertical direction;
A first plate spring extending in the up and down direction so as to move up and down by the electromagnet and the armature, and connected to the movable portion;
Equipped with a combination balance. The vibration unit is
A fixed frame to which the electromagnet is connected;
A movable frame to which the armature is coupled;
And a pair of second leaf springs which connect the upper ends and the lower ends of the fixed frame and the movable frame with each other and extend in the horizontal direction,
The combination balance according to claim 1, wherein the movable frame is connected to the first plate spring. Comprising the two vibrating units,
3. The combination balance according to claim 1, wherein the two vibration parts are disposed on the lower side of the movable part to face each other across the movable part. A pair of said weights are provided,
The combination balance according to claim 3, wherein the pair of weights connect the two vibrating portions so as to sandwich the movable portion.