JP4496003B2 - Load cell built-in mass weighing device - Google Patents

Description

The present invention, when a desired material (for example, a granular material such as a synthetic resin raw material) is put into the material storage tank and stored in a mass weighing device having a discharge device attached to the material storage tank, The present invention relates to a load cell built-in type mass measuring device capable of accurately measuring the mass of the charged material.

Various materials (solid material, liquid material, powdered or granular material, etc.) as a mass transducer for measuring the mass of it is known to use a load cell.

Conventionally, as a mass measuring device using this load cell, there is one that measures the mass of the powder material by storing the powder material such as leaf tobacco in the material storage tank and measuring the total mass of the powder material ( For example, see Patent Document 1.)
Also as part of the mixing apparatus using a mass sensor, a hanging type material reservoir tank having a material inlet, a mass weighing device formed by supported by the mass sensor has been disclosed (for example, Patent Documents 2).
JP 2000-46636 A JP-A-2-253835

However, these mass weighing devices have the following problems.

First, the former mass weighing apparatus has a problem that only so-called batch processing can be performed to measure the mass of the powder material stored in the material storage tank.

That is, after measuring the mass of the powder material stored in the material storage tank, another powder material is stored in the material storage tank after the measurement in order to perform mass measurement of other powder materials. Replace with another material storage tank, or remove the measured material storage tank from the mass weighing device, then discharge the stored powder material and put another powder material into it. To weigh the mass .

However, this method has the problems that it takes time and time each time the mass of the powder material is measured, and the mass of the powder material cannot be measured continuously.

On the other hand, in the latter mass weighing device, the material storage tank is provided with a discharge shutter for discharging the stored material, and thus there is no such problem.

However, in this mass weighing device, since the material storage tank is suspended and supported by the hanging metal fittings provided above and outside, the outside of the material storage tank far from the center of gravity of the material storage tank is used as a fulcrum. Supporting structure.

Therefore, there is a problem that an error in measuring the mass of the material storage tank is likely to occur, and the mass of the stored material cannot be accurately measured.

In addition, since the above-mentioned hanging hardware is attached to the outside of the material storage tank, the load cell attached to the material storage tank is damaged by inadvertent vibration or impact during transportation of the mass weighing device. There was also a problem that it was easy.

An object of the present invention is to solve such a problem, and a load cell built-in type mass meter capable of accurately measuring the mass of an input material or a discharged material by supporting the vicinity of the center of gravity in a material storage tank with a load cell. Providing the device.

To achieve the above objective,
A load cell built-in type weighing device according to claim 1 includes a material storage tank having a material input port, wherein the material storage tank measures the mass of the granular material stored in the material storage tank. Both ends are fixed to the openings formed in the opposing side walls of the material, and the structure penetrates the material storage tank and is disposed orthogonal to the vertical axis including the center of gravity of the mass measuring device. a carrying arm made of, while being disposed in parallel spaced above carrying arm and spacing, and the material reservoir tank through the opening in a non-contact state, and both ends, surrounds the mass metering device supporting a support frame which is fixed to the framework by a frame member so that, just below substantially the center of the bearing arm, and is disposed on the vertical axis close to the center of gravity on the support frame the bearing arm Characterized in that it comprises a load cell, a.

In this construction, the support frame, so as not to receive the load of the mass metering device, provided edge cut in a non-contact state with the mass metering device, a load cell is disposed in place of the support frame, the Since the load cell is configured to support the carrying arm provided in the material storage tank, the entire load of the mass measuring device is applied to the load cell in the material storage tank.

With such a structure, since the load cell can be installed at a position close to the center of gravity of the mass measuring device, the mass of the material to be charged can be accurately measured with high accuracy.

  Further, since the load cell is accommodated in the material storage tank, there is no possibility of being damaged during transportation.

According to a second aspect of the present invention, there is provided the load cell built-in type mass measuring device according to the first aspect, wherein the material storage tank is provided with a discharge device for discharging the material stored in the material storage tank.

In this case, since the discharge device for discharging the material stored in the material storage tank is attached, the stored material can be discharged by the discharge device. Moreover, since the mass of the material to be charged is independent of the mass discharged by the discharging device, it can be continuously charged and continuously discharged in accordance with either the batch processing method or the loss-in-wait method, Work efficiency can be increased.

According to a third aspect of the present invention, in the load cell built-in type mass weighing apparatus according to the first or second aspect, the carrying arm is provided with a pointed roof at the upper end.

  In this case, since the carrying arm in the material storage tank is provided with a pointed roof at the upper end, it is possible to prevent the charged material from being accumulated when passing through the carrying arm.

Therefore, the mass of the input material can be measured more accurately.

The present invention has the following effects.
According to the mass measuring apparatus with a built-in load cell according to claim 1, since the load cell can be installed at a position close to the center of gravity of the mass measuring apparatus, the mass of the material to be charged can be accurately measured with high accuracy.

Moreover, since the load cell is accommodated in the material storage tank, there is no possibility of being damaged during transportation.
Further, in this device, the carrying arm is a structure that is orthogonal to the vertical axis including the center of gravity of the mass weighing device, and the load cell is disposed immediately below the center of the structure. Can be formed into a desired shape such as one character or ten characters.

According to the mass measuring apparatus with a built-in load cell according to the second aspect, since the discharge device for discharging the material stored in the material storage tank is attached, the stored material can be discharged by the discharge device. Moreover, since the mass of the material to be charged is independent of the mass discharged by the discharging device, it can be continuously charged and continuously discharged in accordance with either the batch processing method or the loss-in-wait method, Work efficiency can be increased.

According to the mass measuring apparatus with a built-in load cell according to the third aspect, the carrier arm in the material storage tank is provided with a pointed roof at the upper end, so that the charged material passes through this carrier arm. It is possible to prevent accumulation at the time. Therefore, the mass of the input material can be measured more accurately.

  Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic overall perspective view of a load cell built-in mass weighing apparatus A according to an embodiment of the present invention, partially broken away, and FIG. 2 is a longitudinal sectional view of FIG. 1 viewed from the side. It is. 3 is a schematic cross-sectional view in which the main part shown in FIGS. 1 and 2 is partially enlarged, and FIG. 3 (a) is a main part cross-sectional view as seen from the side in the same direction as FIG. FIG.3 (b) is principal part sectional drawing of the state seen from the front side.

This load cell built-in type mass weighing apparatus A has a material input port 11 at the upper end of the material storage tank 1 narrowed downward, and the material Z stored in the material storage tank 1 at the lower end side thereof. A discharge device 12 for discharging is attached.

  Here, the material Z may be any material Z that can be discharged by the discharge device 12 and may be any of solid material, fluid material, liquid material, etc. The granular material for resin including a thin piece, a short fiber piece, etc. is used.

  Moreover, although the discharge device 12 is using what discharge | emits continuously the material Z stored in the material storage tank 1 out of this material storage tank 1 with the rotating screw 12a provided with the drive means. Even if the discharge device 12 is a device that can discharge the material Z stored in the material storage tank 1 to the outside of the material storage tank 1, it may be discharged continuously or quantitatively. I do not care.

  Although the lower end of the material storage tank 1 is closed, as shown in FIGS. 1 and 2, maintenance of the discharge device 12 or an openable / closable lid 13 for discharging the material Z is provided. It is desirable to keep it.

  In such a material storage tank 1, a supporting arm 2 connected only to the material storage tank 1 is provided.

  Specifically, an opening 14 is formed in the opposite side wall of the material storage tank 1, and both ends of the carrier arm 2 are fixed to the opening 14 by welding or the like, and are connected only to the material storage tank 1.

  Although the support arm 2 may be a plate material, in this embodiment, the strength can be increased by using a C-type channel steel material opened downward.

  Further, as shown in FIGS. 1 and 3A, a tip-like roof portion 21 is provided at the upper end of the carrying arm 2. By providing such a pointed roof portion, it is possible to prevent the material Z introduced from the material introduction port 11 from being accumulated on the upper end of the carrying arm 2 when passing through the carrying arm 2.

  Further, the carrying arm 2 here is a single C-shaped steel material penetrating through the material storage tank 1 and is provided in a single character. When the material storage tank 1 is enlarged, For example, it is possible to increase the strength by arranging a plurality of supporting arms 2 in parallel or combining them in a cross shape.

In any case, the supporting arm 2 is a structure that is disposed in a horizontal direction perpendicular to the vertical axis O including the center of gravity G of the load cell built-in mass weighing apparatus A. Preferably, a load cell 3 to be described later is disposed almost directly below the center of the carrying arm 2 formed in such a structure.

Next, the support frame 4 is provided by being cut off in a non-contact state with the load cell built-in type mass measuring device A.

Specifically, the support frame 4 uses a plate-shaped casing parallel to the carrier arm 2 at a distance, or a C-type channel steel material similar to the above that is opened upward. is passed through the frame 4 into the opening 14 of the material reservoir tank 1, welded at both ends to the frame member 5 which is a framework so as to surround the load cell internal mass metering device a, by fixing a bolt or the like, a load cell built-in weight Cutting is performed in a non-contact state with the weighing device A.

Then, the weighing unit (not shown) of the load cell 3 is arranged on a desired position of the edge-supported support frame 4, specifically, on the vertical axis O close to the center of gravity G of the load cell built-in mass weighing device A. The load cell 3 alone is used to support the substantial center of the carrying arm 2. When a gap is generated between the load cell 3 and the carrying arm 2 or the support frame 4, a spacer for filling the gap may be provided.

In such a load cell built-in mass weighing apparatus A, the support frame 4 is provided in a non-contact state with the load cell built-in mass weighing apparatus A so as not to receive the load of the load cell built-in mass weighing apparatus A directly. Since the load cell 3 is disposed near the center of gravity G on the support frame 4 and the support arm 2 is supported by the load cell 3 alone, the load cell built-in mass weighing apparatus A is in a suspended state. Thus, the total load is directly received only by the load cell 3, and the load cell 3 can measure the total mass of the load cell built-in type mass measuring device A.

The load cell built-in type mass weighing apparatus A configured as described above operates as follows.

First, before the material Z is put into the material storage tank 1, the load cell 3 receives only the load of the load cell built-in type mass weighing device A, but the load at this time is set as the mass 0 (zero). Keep it.

  Next, when the material Z is charged into the material storage tank 1 from the material charging port 11, the charged material Z falls through the carrying arm 2 in the material storage tank 1 and enters the material storage tank 1. Store.

Therefore, the mass of the charged materials Z is adds to the load cell internal mass metering device A, the summed mass when weighing a load cell 3 can weigh the mass of charged materials Z.

In addition, since the load cell 3 is installed on the vertical axis O near the center of gravity G of the load cell built-in type mass weighing apparatus A, even if the charged material Z varies in the left and right, the load cell is built in. The mold mass weighing apparatus A can accurately and highly accurately weigh while maintaining the left and right balance.

  On the other hand, the material Z in the material storage tank 1 can be continuously discharged by driving the discharge device 12 after the appropriate amount of the input material Z is stored.

The mass of the discharged material Z is subtracted from the total mass of the load cell built-in type mass weighing device A, contrary to the above, so if the subtracted mass is measured by the load cell 3, the discharged material Z The mass of Z can be measured.

As described above, in the present invention, the material Z can be continuously charged and discharged by a desired mass , and the mass can be accurately measured, so that the working efficiency can be improved.

INDUSTRIAL APPLICABILITY The present invention can be effectively used as a load cell built-in type mass measuring device capable of accurately measuring the mass of a material to be charged or discharged.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general | schematic whole perspective view of the state which fractured | ruptured one part which showed one Example of the load cell built-in type mass measuring apparatus A which concerns on this invention. It is the longitudinal cross-sectional view of the state which looked at FIG. 1 from the side. FIG. 3 is a schematic cross-sectional view in which the main part shown in FIGS. 1 and 2 is partially enlarged, and FIG. 3A is a main part cross-sectional view of the main part shown in FIG. ) Is a cross-sectional view of the main part when viewed from the front side.

Explanation of symbols

A Load cell built-in mass weighing device G Center of gravity O Vertical axis Z Material 1 Material storage tank 11 Material input port 12 Discharge device 2 Carrying arm 21 Roof portion 3 Load cell 4 Support frame

Claims (3)

In a mass metering device comprising a material storage tank having a material inlet and measuring the mass of the granular material stored in the material storage tank,
Both ends are fixed to the openings formed in the opposing side walls of the material storage tank, and the material storage tank penetrates the material storage tank and is disposed perpendicular to the vertical axis including the center of gravity of the mass measuring device. A supporting arm made of a structured body ,
The support arm is disposed in parallel with a space, and penetrates the opening in a non-contact state with the material storage tank, and both ends thereof are framed so as to surround the mass measuring device. A support frame fixed to the frame member ;
A load cell for supporting the carrying arm above the approximate center directly below the bearing arm and is disposed on the vertical axis close to the center of gravity on the support frame,
A mass weighing apparatus with a built- in load cell. In claim 1,
A load cell built-in type mass measuring device, wherein the material storage tank is provided with a discharge device for discharging the material stored in the material storage tank. In either claim 1 or 2,
The load arm has a built-in load cell-type mass weighing device characterized in that a pointed roof portion is provided at the upper end.

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