JP2005069910A - Dimension and weight measuring device for article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve dimension measurement accuracy by fixing a measuring table at the time of dimension measurement. <P>SOLUTION: In dimension measurement, when a sensor gate 5 begins to move from an initial position, a roller 9 contacts with an upper side of a lever 8 and presses the lever 8 downwardly. Therefore, a link mechanism 7 is operated, and presses projecting pieces 11 upwardly by lifting operation sticks 10 in both sides. Accordingly, a base plate 3 is fixed so as to be immobile, and in addition, the measuring table 4 is fixed. In this state, the measuring table 4 functions as a reference surface, enabling accurate dimension measurement. While a moving distance of the sensor gate 5 is measured, dimension of an article S is photoelectrically measured. In this case, a plane projection shape of the article S is measured by moving distances of a photoelectric unit and the sensor gate 5 in a vertical direction of the sensor gate 5. In addition, a side surface projection shape of the article S is obtained by the moving distances of the photoelectric unit and the sensor gate 5 in a horizontal direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for measuring the weight and weight of an article capable of measuring the dimensions and weight of the article.

  A conventional dimensional weight measuring apparatus for an article, for example, as in Patent Document 1, places an article to be measured on a measurement table and measures the weight and the dimension simultaneously or with a time difference. In this case, the dimensions of the article are measured by measuring the length, width, height, etc. using the measurement table as a reference surface.

JP-A-11-83603

  However, in such a conventional apparatus, when an article is placed on a measurement table that also serves as a weight measurement, the measurement table swings or slightly sinks depending on the weight of the article. Further, when the article is placed at the corner of the measurement table instead of at the center, the measurement table may not only sink but also be inclined.

  When measuring the weight, it is necessary to be able to move the measurement table without being mechanically restrained in this way. However, since the measurement table is used as a reference surface for measuring the dimensions of the article, it is sufficient if the measurement table moves. Dimensional accuracy cannot be obtained.

  In order to solve the above-described problems, an object of the present invention is to provide an apparatus for measuring the dimensional weight of an article that improves the measurement accuracy by fixing a measurement table during dimension measurement.

  In order to achieve the above object, a dimensional weight measuring apparatus for an article according to the present invention is a measuring apparatus for placing an article on a measuring table and measuring the size and weight separately. A means for fixing is provided.

  In the present invention, the measurement surface is fixed at a predetermined position at the time of dimension measurement, so that the reference plane is determined and the dimension measurement accuracy is improved.

  Dimension measurement and weight measurement are carried out in separate time zones, and measurement is performed after fixing the measurement table on which the article is placed during dimension measurement.

  FIG. 1 is a perspective view of the apparatus, which includes a dimension measuring unit 1 and a weighing unit 2. On the base plate 3 of the weighing section 2, a measuring base 4 for placing an article to be weighed is placed in a bowl shape via four column parts 4a. A weighing mechanism made of, for example, a load cell is disposed below the base plate 3 so that the dimensions and weights of the article S placed on the measurement table 4 can be measured.

  In the dimension measuring unit 1, a sensor gate 5 composed of a square frame surrounding the measuring table 4 is guided between the column parts 4a of the measuring table 4 along the rail 6 in the longitudinal direction and moved by a driving mechanism (not shown). It is possible. A light source / sensor group consisting of a large number of sets of photoelectric units is arranged in the vertical direction and horizontal direction in the sensor gate 5, and parallel luminous fluxes in the vertical and horizontal directions with respect to the article S by a light projecting light source such as a light emitting diode. The width dimension and the height dimension of one section of the article S can be measured by a light receiving sensor such as a photodiode disposed on the opposite side.

  And in order to permeate | transmit a light beam to the up-down direction with respect to the articles | goods S on the measurement stand 4, the part which mounts the articles | goods S of the measurement stand 4 is made into the transparent glass plate or the acrylic board 4b. A sensor composed of a linear scale or the like for measuring the moving distance of the sensor gate 5 is arranged along the rail 6.

  In the weighing unit 2, the weight of the article S placed on the measuring table 4 is transmitted to the weighing mechanism through the column part 4 a and the base plate 3 and is weighed.

  Link mechanisms 7 are provided on the sides of the base plate 3, and these link mechanisms 7 are connected to each other by a trapezoidal lever 8. The upper side of the lever 8 is attached to the lower end of the sensor gate 5. The roller 9 comes into contact. The link mechanism 7 is configured to lift the operating rods 10 located on both sides of the base plate 3, and in the state where the operating rod 10 is lifted, push the projecting pieces 11 attached to the four corners of the base plate 3 from below, The base plate 3 can be fixed at a predetermined position.

  When measuring the article S, either the dimension measurement or the weight measurement may be performed first. However, in the weight measurement, the sensor gate 5 is stopped at the initial position, and the roller 9 is free with respect to the lever 8. Therefore, the interference to the base plate 3 by the link mechanism 7 is released, and the load of the article S is accurately transmitted to the load cell. The weight of the article S is weighed together with the weights of the measurement table 4 and the base plate 3, and the measurement is performed by subtracting the measurement base 4, the base plate 3 and the like as a tare.

  When measuring the dimensions, when the sensor gate 5 starts moving from the initial position, the roller 9 comes into contact with the upper side of the lever 8 and presses the lever 8 downward as shown in the figure. By raising the operating rod 10 and pushing up the protruding piece 11, the base plate 3 is fixedly fixed, and further, the measuring base 4 is fixed.

  In this state, accurate dimension measurement is possible, and the dimension of the article S is measured photoelectrically while measuring the movement distance of the sensor gate 5. In this case, the planar projection shape of the article S can be measured by the vertical photoelectric unit of the sensor gate 5 and the movement distance of the sensor gate 5. Further, the side projection shape of the article S is obtained by the moving distance of the photoelectric unit and the sensor gate 5 in the horizontal direction.

  During this dimension measurement, the measurement table 4 is fixed at a predetermined reference position as the base plate 3 is fixed, and is not displaced by the weight of the article S, so that accurate dimension measurement is possible. When the dimension measurement is completed, the sensor gate 5 moves to the other end with respect to the measurement table 4, so that the roller 9 is disengaged from the upper side of the lever 8, and the measurement table 4 becomes free again.

  Although the base plate 3 is fixed in conjunction with the movement of the sensor gate 5 in the first embodiment, the link mechanism 7 may be driven by a motor, a solenoid, and a plunger separately without being interlocked with the movement of the sensor gate 5. it can. Further, the base plate 3 may be fixed by adsorption with an electromagnet.

It is a perspective view of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dimension measurement part 2 Weighing part 3 Base plate 4 Measurement stand 5 Sensor gate 6 Rail 7 Link mechanism 8 Lever 9 Roller 10 Operation rod 11 Projection piece

Claims (5)

  A measuring apparatus for placing an article on a measuring table and measuring the size and weight separately, comprising: means for fixing the measuring table at the time of measuring the dimensions.   2. The dimensional weight measuring apparatus for articles according to claim 1, wherein the measuring table is constructed on a base plate and the base plate is fixed.   The dimension / weight measuring apparatus for an article according to claim 1, wherein the dimension measurement is performed by projecting a parallel light beam from a light projecting light source onto the article and receiving light by a light receiving sensor.   4. The dimension / weight measuring apparatus for an article according to claim 3, wherein the dimension measurement is performed by moving a sensor gate containing a sensor group including the projection light source and a light receiving sensor around the measurement table.   5. The dimensional weight measuring apparatus for articles according to claim 4, wherein the measurement table is fixed mechanically in conjunction with movement of the sensor gate.

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