JP2002365124A - Weighing equipment for long member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with surplus equipment space separately, and to eliminate a time required for preparation of a reference weight to conduct calibration in a short time. SOLUTION: This weighing equipment is provided with a lifting mechanism 3 for lifting up a steel pipe P in a prescribed position, a load detector 6 for weighing a weight of the steel pipe P lifted by the the mechanism 3, the reference weight 4 provided in the vicinity of the lifting mechanism 3, and a lifting mechanism 5 for the reference weight 4. A weight of the reference weight 4 lifted by the reference weight lifting mechanism 5 is detected by the load detector 6 for weighing the weight of the steel pipe P. Since the time required for the preparation of the reference weight is eliminated, the reference weight lifted by the reference weight lifting mechanism is enough to be weighed only by the load detector, so as to allow calibration work to be carried out in the short time. No surplus equipment space is also required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for weighing a long heavy object such as a steel pipe, a bar, a bar or a billet.

[0002]

2. Description of the Related Art For example, in the process of manufacturing a steel pipe and inspecting and shipping a product, it is common to measure the weight of the steel pipe for product management. Conventionally, the calibration of a weighing device that performs this weight measurement is performed by preparing a reference weight each time, and combining and loading the reference weights one by one in a range from a low load to a maximum load in a measurement range of the weighing device. By comparing the output of the load detector as described above with the reference weight value, pass / fail was determined.

In Japanese Utility Model Application Laid-Open No. 61-105828,
There has been proposed a device in which a reference weight for calibrating a weighing device is always mounted on a carriage waiting outside the weighing device, and the carriage is moved to the weighing device during calibration.

[0004]

However, in the conventional method of preparing a reference weight each time the test is performed, the time required for preparing the reference weight is separately required, so that the time required for the entire test becomes longer and the work efficiency is reduced. There was a disadvantage of getting worse.

In the method proposed in Japanese Utility Model Application Laid-Open No. Sho 61-105828, the time required for preparation of the reference weight can be shortened. In addition, a trolley line on which the reference weight is mounted must be laid, which requires additional equipment space.

Incidentally, in a steel pipe production line that measures 50,000 tons per month and 60,000 to 70,000 pieces per month, the verification work using the above-described method and apparatus is extremely inefficient, and the productivity is extremely low. It becomes a factor of deterioration.

The present invention has been made in view of the above-mentioned conventional problems, and does not require extra equipment space, and eliminates the time required for preparing a reference weight, thereby shortening the time. An object of the present invention is to provide a weighing device for a long object capable of performing an assay.

[0008]

In order to achieve the above-mentioned object, a long object weighing apparatus according to the present invention weighs the weight of a long object lifted by a lifting mechanism for lifting the long object at a predetermined position. The load detector detects the weight of the reference weight lifted by the reference weight lifting mechanism provided near the lifting mechanism.

In this way, the test can be performed in a short time without requiring extra equipment space and eliminating the time required for preparing the reference weight. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A weighing device for a long object according to the present invention comprises a lifting mechanism for lifting a long object at a predetermined position, a load detector for weighing the weight of the long object lifted by the lifting mechanism, A reference weight provided near the lifting mechanism and a lifting mechanism for the reference weight are provided, and the weight of the reference weight lifted by the reference weight lifting mechanism is detected by a load detector that weighs the weight of the long object. It is what was constituted.

[0011] According to the long object weighing apparatus of the present invention,
Since the time required to prepare the reference weight is unnecessary, at the time of verification, the reference weight lifted by the reference weight lifting mechanism is
It suffices to simply weigh with a load detector, and the test can be performed in a short time, and no extra equipment space is required.

In the above-described weighing apparatus for a long object according to the present invention, when the reference weight is divided into n parts and the divided reference weights can be weighed individually and appropriately in combination, a straight line is obtained. Tests such as gender can be performed easily in a short time.

In this case, when the reference weights divided into n numbers have different weights, a more detailed test can be performed by a combination of the reference weights.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an apparatus for weighing long objects according to the present invention.
A description will be given based on one embodiment shown in FIGS. FIG. 1 is a view for explaining the planar arrangement of the entire long object weighing apparatus according to the present invention, FIG. 2 is a view taken along a line AA in FIG.
FIG.

FIGS. 1 to 3 show, for example, 6 for transferring a steel pipe P.
The example in which the weighing device for a long object according to the present invention is arranged in one part of the skid rail 1 of the book, and the skid rail 1 is placed at a lower position where the transfer of the steel pipe P between the skid rails 1 is not obstructed. The six lifting mechanisms 3 for transferring and temporarily lifting the steel pipe P temporarily stopped by the stopper 2a and the five lifting weights 3 for appropriately combining the reference weights 4 divided into five for each 1 ton at the time of verification, for example. The reference weight lifting mechanisms 5 are arranged alternately in series and so as not to interfere with each other.

By the way, as shown in FIG. 1, on the upstream side of the weighing device, the steel pipe P transferred on the skid rail 1 with its end surfaces aligned is short to long (for example, 4 to 15 m). ) Are available in various lengths, but the lifting mechanism 3 is not limited to this embodiment as long as the lifting mechanism 3 can be lifted at at least two places regardless of the length of the steel pipe P. It is not necessary to arrange between all the skid rails 1 as shown in FIG.

In this embodiment, the lifting mechanism 3
As shown in FIG. 2, the stoppers 2a and 2b arranged on the upstream and downstream sides in the transport direction with the lifting mechanism 3 interposed therebetween enable
A steel pipe weighing block 3a on which only one steel pipe P stopped at a predetermined position is to be lifted by moving a rod of a cylinder device 3b up and down, and a reference weight lifting mechanism 5 is divided into five individual weights. As shown in FIG. 3, so that individual weighing operation can be performed on the reference weight 4.
Although the reference weight weighing block 5a on which each reference weight 4 is placed is lifted by moving the rod of each cylinder device 5b, the steel pipe P to be weighed and the reference weight 4 can be lifted. If so, another configuration may be used.

Reference numeral 6 denotes a load detector, such as a load cell, for weighing the weight of the steel pipe P lifted by the above-described lifting mechanism 3. The load detector 6 detects the reaction force acting on the steel pipe weighing block 3a, thereby detecting the weight of the steel pipe P. Weigh it.
The load detector 6 is designed to detect a reaction force acting on the reference weight weighing block 5a when the reference weights 4 are combined and lifted by the above-described reference weight lifting mechanisms 5 at the time of verification. 3 and a gantry 7 supporting the reference weight lifting mechanism 5 are common.

As shown in FIG. 3, each of the reference weights 4 and the respective lifting mechanisms 3 and the respective weights of the respective reference weights 4 are used to prevent the weight of each of the reference weights 4 from acting on the load detector 6 when the steel pipe P is weighed. Needless to say, it is mounted on a stand 8 provided separately from the stand 7 supporting the reference weight lifting mechanism 5. Further, in this embodiment, in order to enable the reference weight 4 to be transported outside the weighing device according to the present invention at the time of regular weight verification, the upper part of each reference weight 4 is shown in FIGS. As shown, no structures were placed.

The apparatus for weighing long objects according to the present invention has the above-described configuration. At the time of verification, for example, as shown in FIG. 4, each reference weight lifting mechanism 5 is sequentially operated one by one. Then, each one ton of the reference weight 4 is sequentially applied to the load detector 6 one by one, and the linearity of the load detector 6 is determined based on the output value of the load detector 6 corresponding to the reference weight 4, and the accuracy is verified. It does.

In such a test using the apparatus for weighing long objects according to the present invention, the time required for weighing each reference weight 4 depends on the operation of the reference weight lifting mechanism 5 and the operation of the load detector 6. It is about 20 seconds including the output confirmation,
In the above embodiment, even if a time lag for moving to the next operation is added, which is five times as long as about 20 seconds, the verification operation is completed in about several minutes, and the verification can be performed in an extremely short time.

In this embodiment, the reference weight 4 is divided into five parts each having a weight of 1 ton.
Ton, 1.5 ton, and 2 ton are divided into four parts, these are combined and weighed, the linearity of the load detector 6 is determined based on the output value of the corresponding load detector 6, and the accuracy is verified. For example, as shown in FIG. 5, a more detailed test can be performed.

In this embodiment, the case where the steel pipe is weighed has been described, but it goes without saying that the object to be weighed is not limited to the steel pipe. Further, in this embodiment, six lifting mechanisms 3 and five reference weight lifting mechanisms 5 are installed in the middle of a transport line composed of a plurality of skid rails 1, but the transport line is a skid rail 1. It goes without saying that the number of lifting mechanisms 3 and reference weight lifting mechanisms 5 is not limited to those of the embodiment. Needless to say, the weighing device for long objects according to the present invention may be installed separately from the transport line.

[0024]

As described above, according to the present invention,
Since the time required to prepare the reference weight is unnecessary, at the time of verification, the reference weight lifted by the reference weight lifting mechanism is
It suffices to weigh only with the load detector, and the verification work can be performed in a short time, and no extra equipment space is required.

If the reference weight is divided into n parts and the divided reference weights are individually and appropriately combined and weighed, the test for linearity and the like can be performed in a shorter time, and Easy to do. At this time, when the reference weights divided into n numbers have different weights, a more detailed test can be performed by a combination of the reference weights.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a planar arrangement of an entire long object weighing apparatus according to the present invention.

FIG. 2 is a view taken on line AA of FIG. 1;

FIG. 3 is a BB view of FIG. 1;

FIG. 4 is a diagram showing an example of a weighing characteristic of a reference weight.

FIG. 5 is a diagram showing another example of the weighing characteristic of the reference weight.

[Description of Signs] P steel pipe 3 Lifting mechanism 4 Reference weight 5 Reference weight lifting mechanism 6 Load detector 7 Mount 8 Mount

Claims (3)

[Claims] 1. A lifting mechanism for lifting a long object at a predetermined position, a load detector for measuring the weight of the long object lifted by the lifting mechanism, a reference weight provided near the lifting mechanism, and a reference A weighing device for a long object, comprising a weight lifting mechanism, wherein the weight of the reference weight lifted by the reference weight lifting mechanism is configured to be detected by a load detector that weighs the weight of the long object. . 2. The weighing device for a long object according to claim 1, wherein the reference weight is divided into n parts, and the divided reference weights can be weighed individually and appropriately in combination. 3. The apparatus for weighing long objects according to claim 2, wherein the reference weights divided into n numbers have different weights.