JP4627995B2 - Weighing hopper for combination weigher - Google Patents

Description

The present invention relates to a hopper structure mainly used in a combination weigher in consideration of relaxation of an impact load caused by breakage of an article thrown into the hopper or throwing in.

The combination weigher is a weighing device that obtains a target weight by putting articles having variations in individual weights into containers and weighing them, and combining the measured values. As shown in FIG. 2, the combination weigher has a plurality of hoppers (containers) arranged side by side in the vertical direction of 13, 14 and 16. For example supplied to the upper stage hopper 13, the weighing hoppers 14 to the middle stage, further auxiliary hopper 16 (memory hopper) to the lower stage, and the like. In such a configuration, when an object to be weighed is put on the dispersion feeder 11, it is guided along a slope of the dispersion feeder to a linear feeder provided for each hopper. The objects to be weighed which have reached the linear feeder is transported to the weighing hoppers of the middle stage from the supply hopper is supplied to the supplying hopper 13 by a predetermined timing. Weighing the objects to be weighed which have been put into the hopper are weighed Ri by the weighing means is converted immediately weight value waiting for stabilization of the weighing values. And the target weight is obtained by combining those weight values variously.

Therefore, when the target weight value is determined, the weighing means constituting the target weight value is specified. That is, a combination of weighing hoppers is selected, and the objects to be weighed are discharged from the selected weighing hoppers to the collecting chute 17, respectively. At this time, the objects to be weighed in the weighing hoppers not selected for combination are transferred to the auxiliary hopper below. The weighing hopper that has been emptied is again supplied with the objects to be weighed for the next combination selection from the upper supply hopper.

However, in the combination weigher of this configuration, if the objects to be weighed is transported to the weighing hopper, say stability becomes slow metering time of the weighing value by the shock metering means when該被weighed dropped prolonged problem There is. In order to obtain an accurate measurement value, it is necessary to read the measurement value with a view of sufficient stability of the measurement value . However, if the measurement time is prolonged, the measurement cycle of the combination weigher becomes longer and the processing capacity is lowered . In recent years, however, improvement in processing capacity has been screamed, and a new review of the prior art has been demanded.

In addition to the problem that the measuring time is extended due to the impact of dropping the object to be weighed, there is a need for a preventive measure against the problem that the object to be weighed is broken by the impact of dropping. This is a problem that, as can be seen from the configuration of the combination weigher described above, the object to be weighed collides with the hopper not only when it is fed from the linear feeder into the supply hopper but also when it is transferred to each hopper. . This problem is disclosed in Non-Patent Documents 1 and 2.

In this non-patent document 1, when the object to be weighed is easily broken or broken like confectionery, rice crackers, peanuts, etc., as described above, the object to be weighed is dropped and moved one after another. Has the disadvantage of cracking or chipping. As a countermeasure, it is disclosed that a buffer body is provided in the hopper to reduce the falling speed of the object to be weighed along the dropping path of the object to be weighed.

Further, Non-Patent Document 2 discloses that a buffer member for receiving a bar-shaped article falling from a feeder on a tilted inclined surface and guiding it to the bottom is provided in the hopper so that an object to be weighed does not break the bar-shaped article. ing.

Utility Model Publication Gazette Showa 60-185231 Utility Model Bulletin No. 5-9346

However, in this case, when the object to be weighed contacts the buffer plate, the stability of the measured value may be disturbed by the impact force. In other words, once it comes into contact with this buffer plate, a relatively high impact waveform appears due to the impact force at the time of collision, and when the waveform is about to settle, the object to be weighed in contact with the buffer plate reaches the bottom part of the hopper. The impact waveform tends to appear again due to the impact, resulting in a longer measurement time. In this method, the object to be weighed tends to break when it comes into contact with the buffer plate. Although it is described that it is flexible enough to bend slightly due to the collision of the object to be weighed, the plate-like body cannot actually prevent breakage.

Conventionally, as a method for solving such a problem, a structure in which cushion rubber or the like is attached to the hopper with almost no gap has been used. A new problem has arisen that it is not necessarily hygienic in terms of handling foods that are difficult to clean and disinfect.

The present invention solves such a conventional problem, and by preventing the above-mentioned impact force all at once, it prevents breakage of an object to be weighed at once, and at the same time, a combination weighing scale for food with high processing capacity. Is to provide.

In order to solve the above-described problem, a weighing hopper for a combination weigher according to a first aspect of the present invention includes a rectangular container having an article input opening in the upper part and an article discharge opening in the lower part, and the square In the hopper having a gate incorporated in the container and capable of opening and closing the discharge port of the rectangular container, an elastic body buffer provided on the hopper inner wall in the same direction as the opening and closing direction of the gate of the hopper The elastic body buffer portion is provided with one end as a rod- like elastic body buffer portion and the other end as a plate-like portion, and the rod-like elastic body buffer portion has an inner width when the gate width is the inner width of the hopper. The bar-like elastic body buffer portion provided in the substantially comb shape is inclined downward from the upper portion of the hopper toward the lower portion of the hopper, and is formed on the upper plate-like portion at the other end. Is provided with a folded part, and the folded part is A weighing hopper for combination weigher having elastic buffer unit removably attached to the turned opening of the hopper.

A second invention for solving the above-described problem is a rectangular container having an opening for article loading at the upper part, an opening for article loading at the upper part, and an opening for discharging articles at the lower part. When, built into angular shaped container, in the hopper having a double door gate that enables opening and closing the discharge port of the angular shaped container, provided with opening and closing the same direction as the hopper wall of the casement gate of the hopper Two elastic buffer portions facing each other , each elastic buffer portion having one end as a rod-like elastic body buffer portion and the other end as a plate-like portion, and the rod-like elastic body buffer portion having the gate width Is a substantially comb shape along the inner width of the hopper, and the rod-like elastic body buffer portion provided in the substantially comb shape is opposed to the hopper from the upper part to the lower part of the hopper. And tilted down, above each other end The Jo portion folded portion is provided, the folded portion is weighing hoppers for combination weigher having elastic buffer section capable respectively detachably attached to the turned opening of the hopper.

According to a third aspect of the present invention for solving the above-described problem, two opposing bar-like elastic body buffering portions according to claim 2 are provided, wherein the two bar-like elastic body buffering portions are disposed above the hopper from above the hopper. The combination weighing hopper is characterized in that it is inclined downward as it goes downward, and the respective tip end portions of the rod-like elastic body buffer portions are provided in a staggered state.

A fourth invention for solving the problem is characterized in that the elastic body buffer portion is made of a metallic leaf spring material and is, for example, hard stainless steel.

A fifth invention for solving the problems is characterized in that the elastic body buffer portion is made of a resin material.

The weighing hopper for a combination weigher according to the present invention has a rectangular container having an opening for loading articles at the upper part and an opening for discharging articles at the lower part, and a gate that can open and close the discharge port of the rectangular container. An elastic body shock absorber provided on a hopper inner wall in the same direction as the gate opening / closing direction of the hopper, the elastic body shock absorber having one end as a rod-shaped elastic body shock absorber and the other end in a plate shape The rod-shaped elastic body buffer portion is formed in a substantially comb shape along the inner width when the gate width is the inner width of the hopper, and the rod-shaped elastic body buffer portion is provided in the substantially comb shape. Is inclined downward from the upper part of the hopper toward the lower part of the hopper, and a folded part is provided on the upper plate-like part at the other end, and the folded part is detachable from the loading opening of the hopper. A combination having an elastic buffer that can be mounted Because the weighing hopper is used, when the object to be weighed is introduced from the top of this hopper, it collides with the rod-shaped elastic body, but since the elastic body is rod-shaped and bends, the object to be weighed flexibly contacts the hopper gate and is There is very little damage to the object, and the impact force is moderate when it reaches the bottom of the hopper. In addition, because it is a rod-shaped elastic body, the impact due to the fall of the object to be weighed is sufficiently buffered, so that a steep shock waveform does not appear in the combination weighing device, and the stabilization time from when the object is weighed until the weight value is read is reduced As a result, the weighing cycle of the combination weigher is shortened and the throughput is improved. In addition, by making the buffer part into a comb shape, even a thin and weak object to be weighed, such as potato chips, bends strongly, while others touch softly, so the conventional plate shape that was made to be bent overall There is an effect that is harder to break than the elastic body.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a hopper according to an embodiment of the present invention, and is a partially broken view for clearly showing details. Reference numeral 1 denotes the entire hopper, and reference numeral 2 denotes an upper opening from which an object to be weighed is put. Reference numeral 3 denotes a discharge gate, which is a double-open gate in the figure, but a gate for opening and closing the gate may be omitted. Reference numeral 4 denotes a rectangular container, 5 denotes an inner wall, and 6 denotes a rod-shaped buffer portion which is an elastic body, and for example, stainless steel or resin is used. Reference numeral 7 denotes an insertion portion that can be detachably mounted using the upper end surface of the upper opening of the rectangular container. 8 is a metal folding method so that it can be detachably attached at the folding part, and when it is made of resin, a molding method is preferred. Reference numeral 9 denotes a base end bent portion of the rod-like elastic body that is in contact with the inner wall of the hopper. Reference numeral 10 indicates that a plurality of rod-like elastic bodies are arranged in parallel in a comb shape.

FIG. 2 is a schematic diagram showing the configuration of the combination weigher. 11 is a circular dispersion feeder provided in the center, and 12 is a linear feeder, which is arranged radially corresponding to each hopper. Reference numeral 13 denotes a supply hopper provided corresponding to each of the linear feeders. 13a is a discharge gate. Reference numeral 14 denotes a weighing hopper configured to be located immediately below the supply hopper. Reference numeral 15 denotes a weighing device, which is composed of, for example, a load cell. Reference numeral 14a denotes a discharge gate of the weighing hopper, which corresponds to 3 in FIG. Reference numeral 16 is also called an auxiliary hopper, and is a hopper that temporarily holds a weighed object. Reference numeral 17 denotes a collective chute that collects the objects to be weighed discharged from the hoppers. This figure assumes a circular arrangement, and each hopper is adjacently arranged in the circumferential direction.

The flow of the objects to be weighed will be briefly described. When the objects to be weighed are supplied onto the dispersion feeder 11 located at the upper center, the objects to be weighed are transported to the periphery by the vibration of the dispersion feeder and reach the respective linear feeders 12. The objects to be weighed that have reached the linear feeder 12 are put into the corresponding supply hopper 13 in a predetermined sequence. At this time, there is a distance of, for example, 300 mm from the linear feeder to the bottom of the supply hopper. Further, the object to be weighed in the supply hopper 13 is further transferred to the weighing hopper 14 immediately below it. There is also a predetermined interval between the supply hopper 13 and the weighing hopper 14, and an impact due to natural fall occurs when the supply hopper 13 is transferred to the weighing hopper 14. Furthermore, an impact occurs when the weighing hopper 14 or the auxiliary hopper 16 is discharged to the collecting chute 17 and the object to be weighed is damaged. Therefore, it is preferable to provide a buffer portion by the elastic body according to the present invention at the dropping point of the object to be weighed also in the collecting chute.

It is a perspective view of the hopper for measuring instruments of this invention. It is the schematic which shows the structure of a combination scale.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hopper 2 Opening part 3 Discharge gate 4 Rectangular container 5 Inner side wall 6 Rod-shaped elastic body (buffer part)
DESCRIPTION OF SYMBOLS 7 Insertion part 8 Folding part 9 Base end bending part of rod-shaped elastic body 10 Shows comb-shaped part 11 Dispersion feeder 12 Straight advance feeder 14 Weighing hopper 15 Weighing device 16 Auxiliary hopper 17 Collecting chute

Claims (5)

A rectangular container having an opening for loading articles at the top and an opening for discharging articles at the bottom, and a gate incorporated in the rectangular container and capable of opening and closing the discharge port of the rectangular container In the hopper, an elastic body buffer portion provided on the inner wall of the hopper in the same direction as the gate opening / closing direction of the hopper , the elastic body buffer portion having one end as a rod-shaped elastic body buffer portion and the other end in a plate shape The rod-shaped elastic body buffer portion is formed in a substantially comb shape along the inner width when the gate width is the inner width of the hopper, and the rod-shaped elastic body buffer portion is provided in the substantially comb shape. Is inclined downward from the upper part of the hopper toward the lower part of the hopper, and a folded part is provided on the upper plate-like part at the other end so that the folded part can be attached to and detached from the loading opening of the hopper. A combination with an elastic buffer that can be mounted It scales for weighing hopper. A rectangular container having an opening for loading an article at the top and an opening for discharging an article at the bottom, and a double-opening gate incorporated in the rectangular container and capable of opening and closing the discharge port of the rectangular container in hopper having, a two elastic cushioning portion facing provided on the opening and closing the same direction as the hopper wall of the casement gate of the hopper, the elastic body of the rod-shaped elastic member buffer portion of the respective one end as a buffer unit, provided at the other end as the plate-shaped portion, the elastic body cushioning portion of the rod-shaped a substantially comb shape along the inner width when the gate width is set to the inner width of the hopper, the Ryakukushijo The bar-like elastic body buffering portion provided on the upper side of the hopper is inclined downward from the upper portion of the hopper so as to face the lower portion of the hopper, and a folded portion is provided on the upper plate-like portion at the other end. In the opening for opening of the hopper Removably combination weigher for weighing hoppers having elastic buffer portion can be attached, respectively Re. 3. Two opposing rod-like elastic body buffering portions according to claim 2, wherein the two elastic body buffering portions are inclined downward from the upper portion of the hopper toward the lower portion of the hopper, and the rod-like elastic body buffering portion. A weighing hopper for a combination weigher having an elastic body buffering portion, wherein the tip portions of the portions are provided in a staggered state. 4. The combination weigh weighing hopper according to claim 1, wherein the elastic body buffer portion is a metallic leaf spring material. 4. The weighing hopper for a combination weigher according to claim 1, wherein the elastic body buffer portion is a resin.

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