JP2014085201A - Weight classifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight classifier to whose control box an indicator for various display is attached, capable of performing highly precise weight measurement with an inexpensive configuration while being least subjected to external electromagnetic noise.SOLUTION: A through-hole 9 is formed whose opening area is smaller than the outer shape of a setting indicator 6 on the wall surface of a control box 4 made of metal. An electric wire 8 derived from the setting indicator 6 attached onto the wall surface of the control box 4 is inserted into the control box 4 through the through-hole 9 to be connected to a control part.

Description

  The present invention relates to a weight sorter for performing sorting based on weight by measuring the weight of an object to be weighed while placing it on a weighing conveyor and transporting it.

  In such a weight sorter, while the object to be weighed is conveyed by a weighing conveyor, the weight of the object to be weighed is measured by a load measuring unit having a load sensor, and the weight of the object to be weighed is calculated based on the measured weight. Depending on the weight, the objects to be weighed are selected on the downstream side of the weighing conveyor (see, for example, Patent Document 1).

  The weight sorter is equipped with a metal control box in which a setting indicator for displaying various settings and measurement results, etc. is incorporated, and in the control box, based on the measurement data of the load measuring unit, A calculation unit that calculates the weight of the object to be weighed and a control unit that performs drive control of the weighing conveyor, display control of the setting indicator, and the like based on the setting of the setting indicator and the like are accommodated.

JP 2011-179965 A

  In the conventional weight sorter, an opening having the same size as that of the setting indicator is formed on the front surface of the control box, and the setting indicator is fitted and attached thereto. For this reason, an external electromagnetic wave may enter the control box as noise from a large opening for installing the setting indicator.

  Since a weak electric signal from the load measuring unit is processed in the control box, the measurement accuracy may be lowered due to the influence of electromagnetic noise that has entered.

  For this reason, in order to suppress the influence of electromagnetic noise, a metal shielding plate is attached to the back of the setting indicator, or conductive coating is applied to the wall of the setting indicator. Invite you.

  The present invention has been made paying attention to such a situation, and has a relatively simple configuration, is not affected by external electromagnetic noise, and can perform weight measurement with high accuracy. The purpose is to provide a machine.

  In order to achieve the above object, the present invention is configured as follows.

(1) A weight sorter according to the present invention includes a weighing conveyor for conveying an object to be weighed, a load sensor for detecting the weight of the object to be weighed on the weighing conveyor, and a control box to which an indicator is attached. In the control box, a weight sorter with a built-in control unit for controlling the display of the indicator,
A through hole having a smaller opening area than the outer shape of the display is formed on the wall of the control box made of a metal material, and the display attached to the wall of the control box uses the through hole. Connected to the control unit in the control box.

  The wall surface of the control box in which the through holes are formed is not particularly limited, but the front surface, the back surface, and the like are preferable.

  “Using a through-hole” means, for example, attaching a connector or the like to the through-hole, and connecting the indicator and the control unit in the control box through the connection tool, or A case in which an electric wire such as a connection cord is inserted through and the display and the control unit in the control box are connected through the electric wire.

  According to the present invention, the opening area for connecting the display unit and the control unit in the control box is small on the wall surface of the control box, for example, small enough that the electric wire connecting the display unit and the control unit is inserted. Since only the through holes are formed, the intrusion of electromagnetic noise into the control box can be sufficiently suppressed with an inexpensive configuration.

  (2) In another embodiment of the present invention, the indicator has a setting unit operated to make settings for the weight sorter.

  The display is preferably composed of a touch panel that serves both as a display unit and a setting unit.

  According to this embodiment, it is possible to set the weight sorter by operating the setting unit of the display unit, and it is possible to display the setting content, the measurement result, and the like on the display unit.

  (3) In a preferred embodiment of the present invention, the indicator is attached to the wall surface of the control box so as to cover the through hole, and an annular seal surrounding the through hole is provided between the indicator and the wall surface of the control box. A member is interposed.

  According to this embodiment, even if the weight sorter is cleaned, water does not enter the control box through the through hole, and the control box can be waterproofed accurately.

  (4) In another embodiment of the present invention, the display device is provided with an opening having a connection port to which a storage medium is connected, and the connection port is closed in a watertight manner with a lid that can be opened and closed.

  According to this embodiment, data can be managed by easily taking in and out various data using a storage medium connected to the waterproof connection port.

  (5) In the embodiment of the above (4), a lock member that engages with the lid body in the closed state and maintains the lid body in the closed state may be provided.

  According to this embodiment, the connection port can be reliably waterproofed by maintaining the closed state of the lid with the lock member.

  (6) In another embodiment of the present invention, a mounting bracket is provided on the wall surface of the control box, and the display is engaged and supported by the mounting bracket.

  According to this embodiment, the display device can be easily attached to and detached from the control box, and the display device can be easily maintained and replaced.

  As described above, according to the present invention, it is possible to perform weight measurement with high accuracy by suppressing intrusion of electromagnetic noise from the wall surface of the control box with an inexpensive configuration.

FIG. 1 is an overall perspective view of a weight sorter according to an embodiment of the present invention. FIG. 2 is a block diagram of the control system of the weight sorter. FIG. 3 is an exploded perspective view of the setting indicator mounting structure. FIG. 4 is an exploded plan view of the waterproof seal structure. FIG. 5 is a vertical side view of the vicinity of the connection port. FIG. 6 is an exploded perspective view showing another embodiment of the setting indicator mounting structure. FIG. 7 is an exploded perspective view showing another embodiment of the setting indicator mounting structure.

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

  FIG. 1 shows an entire weight sorter according to an embodiment of the present invention.

  This weight sorter is used, for example, by being installed in the middle of an object to be weighed line, etc., and includes a weighing conveyor 1, a carry-in conveyor 2 for loading an object to be weighed into the weighing conveyor 1, and a load sensor such as a load cell. A load measuring unit 3 provided with a control box 4 having a setting indicator 6 for displaying various measurement settings and the like, as well as a boundary weight value for weight selection, and the like. It is equipped with a stand 5.

  In this weight sorter, the objects to be weighed supplied to the carry-in conveyor 2 are transferred to the weighing conveyor 1 and conveyed, and the weight of the entire weighing conveyor 1 including the objects to be weighed is measured during this conveyance. In the control box 4, the weight of the object to be weighed is calculated, and it is determined whether the weight of the object to be weighed is, for example, “light”, “appropriate”, or “excess”. Sorting and sorting with a sorting device (not shown).

  The control box 4 is configured in a vertically long box shape with a back surface made of a stainless steel plate, and an opening formed in substantially the entire back surface is closed with a screw plate. In addition, a touch panel type setting display 6 for performing various settings and display of measurement results as described above is mounted on the front surface that is the wall surface at the top of the box.

  FIG. 2 is a block diagram of a control system of the weight sorter.

  In the control box 4, for example, an arithmetic control unit 20 constituted by a microcomputer, a power supply device (not shown), and the like are accommodated.

  The calculation control unit 20 calculates the weight of the object to be measured based on the measurement data from the load sensor of the load measurement unit 3 and determines the weight rank. Further, the arithmetic control unit 20 is connected to the setting display 6 as described later. Based on the setting of the setting display 6, the driving control of the conveyors 1 and 2 and the display control of the setting display 6 are performed. Control each part.

  As shown in FIG. 3, the setting indicator 6 is configured by assembling a liquid crystal touch panel 6 b and a plurality of lamp display parts 6 c to a resin casing 6 a, and is connected and fixed by screws 7 from the inside of the control box 4. Has been.

  An electric wire 8 such as a cord is led out from the back surface of the setting indicator 6 and inserted into the control box 4 through a through hole 9 having a small opening area formed in the front surface of the control box 4. The opening area of the through hole 9 is preferably small. In this embodiment, the wire 8 can be inserted therethrough and a connection port described later can be secured. The electric wire 8 includes a power supply line and a signal line. The power supply line is connected to a power supply device in the control box 4, and the signal line is connected to the arithmetic control unit 20.

  As shown in the exploded plan view of FIG. 4, the setting indicator 6 is formed with a recessed step 10 over the entire circumference, and an annular seal member 11 such as a rubber packing is fitted and mounted. Since the setting indicator 6 is screwed to the front of the box, the seal member 11 is sandwiched between the front of the control box 4 and the setting indicator 6 so that the through hole 9 is waterproofed.

  Further, as shown in FIG. 5, an opening 12 is formed in the lower front surface of the setting indicator 6, and a connection port 13 such as a USB port for attaching and detaching a USB memory as a storage medium is formed in the interior of the opening 12. A cap 14 serving as a lid for opening and closing the opening 12 is mounted so as to be swingable up and down.

  Further, a seal member 15 such as a rubber packing is provided inside the opening 12 so as to surround the connection port 13. When the cap 14 is closed, the annular protrusion 14 a provided on the inner surface of the cap 14 seals. The connection port 13 is waterproofed by biting into the member 15. A lock member 16 that is locked to the lower end of the cap 14 in the closed posture and holds the closed state is attached to the lower end of the setting indicator 6 so as to be swingable up and down.

  Thus, it is not necessary to form a large rectangular opening on the wall surface of the control box 4 as in the prior art, and a through hole 9 having a small opening area enough to secure the connection port 13 through which the electric wire 8 is inserted is formed. Thus, electromagnetic noise that enters the control box 4 can be greatly suppressed with an inexpensive configuration, and weight measurement with high accuracy is possible.

  In addition, since the control box 4 has only to be formed with the through holes 9 having a small opening area, the degree of freedom in selecting the mounting position of the setting indicator 6 with respect to the control box 4 is increased.

  Note that the connection boat 13 may be omitted, and the opening area of the through hole 9 may be further reduced.

  Further, although the weight sorter of this embodiment is waterproof, it need not be waterproof.

  A connector may be attached to the through-hole 9, and the setting indicator 6 and the inside of the control box 4 may be connected via the connector.

(Other embodiments)
The present invention can also be implemented in the following forms.

  (1) Although the touch panel type is used for the setting display 6 in the above embodiment, a setting display 6 having specifications for inputting various settings using a waterproof button switch can also be used.

  (2) In the above embodiment, various setting inputs are performed on the setting display 6, but a single function that performs only display is provided, and an operation unit for setting input is separately provided at an appropriate place in the control box 4. It can also be implemented in the equipped form.

  (3) As shown in FIG. 5, an upward U-shaped mounting bracket 17 is fixed to the front surface of the control box 4 by welding or the like, and the setting indicator 6 is inserted into the mounting bracket 17 from above and mounted. You can also. According to this, the setting indicator 6 can be easily attached and detached, and the setting indicator 6 can be easily maintained and replaced. In this case, a rubber waterproof sleeve 18 is externally attached to the electric wire 8 led out from the lower end of the setting indicator 6, and the waterproof sleeve 18 is press-fitted and fastened into a through hole 9 formed of a round hole formed in the control box 4. Thus, the electric wire 8 can be inserted into the control box 4 in a waterproof state.

  (4) As shown in FIG. 6, vertical grooves 19 may be formed on the left and right sides of the setting indicator 6, and the end sides of the mounting bracket 17 may be engaged therewith. The mounting bracket 17 can be made small and inconspicuous.

  (5) Various structures other than the above can be selected as means for attaching the setting indicator 6 to the front surface of the control box 4. For example, a headed pin protrudes from a plurality of positions on the front surface of the control box 4 to display the setting. After inserting the large-diameter portion of the Dalma-shaped connection hole provided on the back surface of the device 6 into the large-diameter head of the headed pin, the setting indicator 6 is pulled down so that the small-diameter portion of the Dalma-shaped connection hole is reduced in diameter of the headed pin. A well-known pin connecting means that engages with the shaft portion can also be used. In addition, a means for detachably connecting the setting indicator 6 using a buckle-type connector can also be used.

DESCRIPTION OF SYMBOLS 1 Weighing conveyor 3 Load measuring part 4 Control box 6 Setting indicator 8 Electric wire 9 Through hole 11 Sealing member 12 Opening 13 Connection port 14 Cap 16 Locking member 17 Mounting bracket

Claims (6)

A weighing conveyor for conveying an object to be weighed, a load sensor for detecting the weight of the object to be weighed on the weighing conveyor, and a control box to which an indicator is attached; A weight sorter with a built-in control unit that controls display,
A through hole having a smaller opening area than the outer shape of the display is formed on the wall of the control box made of a metal material, and the display attached to the wall of the control box uses the through hole. Connected to the control unit in the control box,
A weight sorter characterized by that. The indicator has a setting unit that is operated to make settings for the weight sorter.
The weight sorter according to claim 1. The indicator is attached to the wall surface of the control box so as to cover the through hole, and an annular seal member surrounding the through hole is interposed between the indicator and the wall surface of the control box.
The weight sorter according to claim 1 or 2. The display device is provided with an opening having a connection port to which a storage medium is connected, and the connection port is closed in a watertight manner with a lid that can be opened and closed.
The weight sorter according to any one of claims 1 to 3. A locking member that engages with the lid in the closed state and maintains the lid in the closed state;
The weight sorter according to claim 4. A mounting bracket is provided on the wall surface of the control box, and the display is engaged and supported by the mounting bracket.
The weight sorter according to claim 1.

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