JPS60181621A - Weighing apparatus - Google Patents

Abstract

PURPOSE:To maintain a high accuracy in the measurement of the weight by transferring work onto a transfer belt as conveying pawls having work placed thereon pass over a weighing base. CONSTITUTION:Work W is conveyed as placed on a pawl plate 3a of a number of rake-shaped conveying pawls 3 mounted on a chain conveyor 2 at a fixed interval. On the other hand, a part of a transfer belt 14 comprising a plurality of belt bodies which are arranged along the width thereof at the position of crossing with the pawl plate 3a slides in contact with the comb-shaped top surface of a weighing base 5 rising from a weighing apparatus 4 so that a horizontal part of the transfer belt 14 moves at almost equal speed in the same direction as the conveyor 2 through a drive roller 15 and both guide rollers 16. Then, as the conveying pawls 3 pass over the weighing base 5, a detection value of the moving position of the conveyor 2 outputted from a position detector 19 is inputted and based thereon, the work W is transferred onto the transfer belt 14 and output of the weighing apparatus 4 is taken in as weighed value on the weighing base 5 to select the classified weight level for the weighed value. The work W is made to drop onto a chute 9 above a discharge chute 9 thus selected to discharge. Thus, the weight can be measured at a high accuracy.

Description

Detailed description of the invention Invention 1d-1 Weight (y) of irregularly shaped objects such as marine products and agricultural products
1 Automatic sorting (related to weighing equipment used in many cases).

The PI device used in conventional automatic sorting machines of this type places the object to be weighed (hereinafter referred to as the work) in a packet serving as a transport container, and then weighs the object by placing the bucket together with a scale during transport. The conventional method used was to measure the weighed value, divide it into weight classification stages, and discharge each work from the packet in stages/neat. 1, which provides stable output, takes time and is difficult to measure at high speed and with high precision. In addition, variations in the bucket weight scale directly result in measurement errors, so there is the hassle of having to standardize the weight of the packets, and there is a possibility that the bucket may fall during work.
The disadvantage is that the weight of the deposited dirt becomes an error, and high-speed, high-precision measurement cannot be expected.

The present invention has been made to solve the two disadvantages, namely, the purpose of the present invention is to improve the
In order to measure with high precision, multiple claws are used instead of a bucket, and the spacing between the claws is reduced during high-speed measurements.
To achieve this objective, the weighing device i4 of the present invention is capable of performing zero-sleeve IF during 4U counting during low-resolution measurements. , a plurality of claw groups consisting of a plurality of claws arranged at a predetermined distance apart in the width direction of the first endless conveyor and the -1st endless conveyor are arranged in plural groups at approximately equal intervals in the traveling direction of the endless conveyorff7. a second endless conveyor interposed between the pawls of the pawl group and provided along the conveyance path of the conveyance device so as to move at approximately the same speed as the conveyance device; and a weighing device for measuring the total weight of the object to be weighed transported by the second endless conveyor from below the second endless conveyor. When the bar passes through the scale II machine, it is dropped and placed on the second endless conveyor in a state where the mouse object placed on the claw rod is separated from the group of claws. One of his hallmarks is that he achieved four wins.

Hereinafter, the present invention will be fully explained based on an illustrated embodiment.

. Weighing weight of real//fii example ″8kjil (conveying device Rin)■
As shown in Figs. 1 to 4, in an automatic sorting machine equipped with A method is adopted in which the weight is measured when the weight is raised from the scale 4 and passed over the scale stand 5 while being transported while being placed on the nail plate (claw) 3a of (claw group) 3. The chain conveyor 2 is driven by a drive sprocket 7 driven by a mower 6.
and the other driven sprocket 8, the river is rotated,
It rotates at a constant speed.

Therefore, on the downstream side of the weighing device 4, that is, below the conveyor 2 on the right side of the drawing, a plurality of discharge/knees 1 and 9, which are made of receiving plates 1 arranged diagonally downward in the width direction (arrow a), are arranged. "Conveyor 2" is placed in order from work feeder IO to conveyor 2.
The workpiece W input into the second stage is transported by the transport claw 3 and traced over the weighing platform 5, after which it is selectively discharged into the extraction chute 9 for each JR quantity classification stage. .

By the way, each conveyance claw 3b has a guide roller 12 of a passive arm 11 which is pivoted to one end of a base shaft 3b which is supported by the conveyor 2, and a guide rail 13 (which is fixed along one side of the conveyor 2). 4) and is driven in the -C vertical direction, the swinging angle of the claw plate 3a is regulated as shown in F in accordance with its movement position.

(a) At the second position of Fl' suspension 4-4, the tip of the claw plate 3a has a swinging angle of two layers.

(1)) At the position where the scale is passing through the scale 4, the claw plate 3a
The angle of oscillation is lower than that before gold.

(c) At a position downstream from the balance vessel 4, the claw plate 3a
Tip ff: Returns to the state of (a), maintains the swing f111 angle, but is selected by a command from a controller (not shown), and at the moe point that reaches the upper blade position of the IL discharge tubes 1 and 9,
Rocking type f (shifts to 1) with the tip of the claw plate 3a lowered.

Next, the scale stand 5 rising from the weighing device 5 has a comb tooth shape.The second side of the weighing platform 5 is made up of double rows of strips 14a arranged on the width line of the nail plate 3a and the erroneous position. A part of the transfer band (second endless conveyor) 14 is in sliding contact, and a hook is rotated between the drive roller 15 and both guide ports 216 to continuously rotate. The horizontal portion of the band 14 is located close to the bottom of the conveyor 2 and is moving in the same direction as the conveyor 2 at approximately the same speed.

Moreover, between the scale stand 5 and each guide frame 16 on both sides,
Receiving plates 17 and 18 are extended for receiving the lower surface of the transfer belt 14.

Although mylar film is used for the band member 14a, a rubber belt, chain, etc. may be used instead.

In addition, a position detector 19 is installed near the movement path of the conveyance claw 3 above the downstream end or upstream end of the weighing platform 5 to completely detect the passage of the conveying claw 3 above the weighing platform 5. .

As described above, at the position where the transport claw 3 enters the weighing device 4, the swing of the transport claw 3 causes the claw &3a to fall downward, so the workpiece W is transferred to the transfer band 14 and placed on the claw plate. 3a and then while passing through the weighing platform 5, the transfer zone 14
I will take you to.

Next, the control unit (not shown) manually detects the detected value of the moving position of the conveyor 2 output from the position detector 19 (7). Multi-feed belt 1
4, it stabilizes on the weighing stand 5, and then the output of the weighing device 4 becomes the m value.

Therefore, in the control device, the above-mentioned weighed electric value is divided into a predetermined heavy classification stage, all stages are sorted, and a guide that lowers and moves the tip of the claw plate 3a is colored according to the classification stage. 1
``Rail 1; 3'' 2 installed Ij/Ko-1・1:3
1' of a: ``Command all movements.

Part: '1j ``As, 'ffff゛昂'', 54 members departed, and placed W on the ground.
Saw with a saw blade of 10 feet/knee 10. Zeru.

In this way, in the operation of the scale h4 in the example, since the measurement is 1-J due to the difference of 1,000 degrees, the transfer claw as the transfer container; I1
11. Therefore, 1·1τJIff +, I
I was measured! -Sill.

In addition, the balance rod device 1 of the embodiment has the following characteristics due to its double structure.

(a) Since the weighing device 4, weighing table 5, and related mechanisms such as the transfer belt 14 are all installed inside the conveyor 2, the entire apparatus is converted into a conveyor/F-1.

(b) Since the weighing device 4 is immobile, the internal operation of the weighing device 4 is stable.

(C) Since the conveyor 2 and the transfer belt 14 move at a constant speed of (lq), there is no possibility that the workpieces will roll during a close race between the workpieces.

(d) The timing of the weighing operation is determined by the workpiece position detector 1.
Since the conveying claw 3 is directly detected at step 9, it is possible to accurately determine the elapsed time required for the weighing operation. This makes it possible to perform stable weighing.

By the way, in the configuration of the above-mentioned embodiment, the eyes 1 and the two rollers along which the transfer belt 14 is guided: the fish roller 16 and the two bridges &17.
．． 18 is installed on a stationary part, although it is a slight step that does not affect the measurement operation, there is a difference in height between the height of the top surface of the F + ゛ platform 5, This gives you a scale! There is a risk of instability, and in order to eliminate this risk, a +14 structure in which the related mechanism of the transfer belt is integrated into the frame is preferable.

As a structure corresponding to this], Figure 5 and (5) are shown below.
A weighing section of another embodiment will be explained with reference to the drawings.

Scale) 6 Scale stand 21C with comb tooth-shaped cross section rising from vessel 2 ()
1[, the front iτ1~ and the rear are respectively driven 0-ra22
and the driven ``-1-ra 2:'' were received by the horizontal rack, 11q11, and the drive roller 22I; Driven by the morph 25, a transport '!t+' 26 is wound between both rollers 22 and 23 for transporting the work V, and the transport claw 3 of the conveyor 2 is It moves in the valley space of each roller 22, 23.

In the weighing section that is formed like this 7I, is it transferred? There is no deviation in the vertical direction in the middle of i\26, so there is no influence on the scale h1 measurement.

As described above, the weighing device according to the present invention;
When the transport claw with the workpiece placed on it passes through the scale stand, the
Since the structure is such that the material is transferred to the transfer belt, stable conveyance is achieved even at high speeds due to stratification. Furthermore, during each measurement, the moment when the workpiece is not on the fixed table or l
By removing the workpiece once at a fixed time and performing zero correction of the weight, there is an effect that the measured 16 degrees of the S cloth can always be maintained with high accuracy.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, a weighing device 1
Figure 2 is a plan view of the missing phase 11 in Figure 1, Figure 3 is an enlarged view of the weighing section in Figure 1, Figure 11 is a schematic diagram of the guide rail shown in Figure 1. 13 is a sectional view, FIG. 5 is a schematic front view of the weighing section showing another embodiment, and FIG. 6 is a side view of the same. ,1
・Transport device (weighing device m), 2--first endless conveyor (conveyor), 3... claw group (transport claw), 3a-
Claw (claw plate), 4, 20, weighing device, 5, 21, scale stand, ■/
I-No. I-Endless conveyor (transfer band), 14a/band body.

Claims (1)

[Claims] a first endless conveyor and a plurality of claws arranged at a predetermined distance of 11'l'' in the width direction of the first endless conveyor; a group-arranged bucket conveyor; a second endless conveyor interposed between the claws of the group of claws and provided along the conveyance path of the conveyance device so as to move at substantially the same speed as the conveyance device; 2. A weighing device for measuring manually dug welfare objects 5-1 to be transported by the second endless conveyor from the lower blade of the second endless conveyor; When passing through the container, the object descends and is placed on the second endless conveyor in a state where the object placed on the group of claws is separated from the group of claws and is then weighed. Weighing device that uses percentage as a sign of