JPS6025547Y2 - weight measuring device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a weight measuring device suitable for use in a fruit sorting device or the like that sorts fruits by weight class.

Such a fruit sorting device uses a chain to transport a cup with fruits placed thereon, and along the transport route, a weighing device measures the weight of the fruit while it is placed in the cup, and then places the fruit in a designated receiving box according to the weight. By the way, the fruit is dropped from a cup and is classified into different weight classes.

In a weight measuring device used in such a fruit sorting device, when the sliding pin that supports the load of the cup carrying the fruit moves on the weighing rail, it hits the transition point and receives an impact due to the difference in the rail. Vibrations may occur.

When this impact is large, the weighing rail vibrates due to the impact, making the weighing output unstable, and it takes time for the weighing output to become stable, causing a problem in that it is not possible to feed the cup 7 degrees at high speed.

This idea and proposal was made with these points in mind.
The purpose is to provide a weight measuring device that allows a weighing load such as fruit to move smoothly and stably when transferring over a weighing rail.

To be distantly related to the above objectives, this invention forms the weighing rail and the guide rail to be long in the direction of movement of the sliding pin, and makes the upper surface almost the same height as the upper surface of the rail, and the center of the guide rail is made long. The weighing rail is arranged at the position of the recessed portion, and the weighing rail is arranged at the position of the recessed portion.

FIG. 1 is a front structural view of an embodiment of a weight measuring device according to this invention, and FIG. 2 is a plan view thereof.

In the diagram, is 1 a fruit? 3 is a cup support device that supports the cup 1 in a tiltable manner; 4 is a sliding pin provided at the bottom of the cup support device 3; and 5 is a rail that supports the sliding pin 4 in a sliding manner. It is.

The cup support device 3 is attached to an endless chain (not shown) and is conveyed in the direction of the arrow.

Rails 5 are arranged along the entire circumference of the chain, and the sliding pins 4 are adapted to slide on these rails 5.

Part of rail 5 is missing as it is the weight measuring device.
A guide rail 8 attached to the board 7 of the weight measuring device in parallel with the rail 5 and a weighing rail 10 attached to the board 7 so as to be movable up and down are respectively arranged in this missing part.

The guide rail 8 is formed to be long so as to straddle between the removed rails 5, and its tip overlaps the rail 5, and an elongated hole 9 is formed in the longitudinal direction of the guide rail 8, so that the weighing rail 10 can be inserted into this length. It is arranged so as to fit loosely into the hole 9.

Both the guide rail 8 and the weighing rail 10 have their rail surfaces (upper surfaces) kept at the same height as the rail surface of the rail 5.

The guide rail 8 is formed with a recess 8a having downward slopes 8a198a2 in the front and back at the center in the longitudinal direction, and downward slopes 8b and 8c at the tip thereof.

Since the length of the four central portions 8a is shorter than the length of the weighing rail 10, the weighing rail 10 is arranged in parallel over the entire length of the recessed portion 8a.

The inclined surfaces 8b and 8c at the tip are formed in a range that is shorter than the length of the overlapping portion with the rail 5 and does not overlap the elongated hole 9 very much.

In addition, a downward slope 10a is also provided at the tip of the weighing rail 10.
, 10b are formed, respectively.

Therefore, as shown in FIG. 1, the rail surfaces of rail 5 → guide rail 8 → weighing rail 10 → guide rail 8 → rail 5 are on the same plane, and the sliding pin 4 slides smoothly on this surface. go.

And even if there are some steps on each rail,
A slope 8 is provided at the transfer point between the rail 5 and the guide rail 8.
b.

8c, and slopes 8a□, 8a2 and 10a, 10b at the transfer point between the guide rail 8 and the weighing rail 10.
Therefore, the sliding pin 4 slides smoothly and stably during transfer.

On the other hand, a weighing table 11 is attached to the lower surface of the weighing rail 10 at approximately the center of gravity, and has a U-shaped cross section and extends downward.

In this weighing platform 11, one end of a link 13 is rotatably attached to a support shaft 12, and one end of a link 15 is rotatably attached to a support shaft 14.

The links 13 and 15 are arranged in parallel, and the other ends are rotatably attached to support shafts 17 and 18 provided on the base plate 7, respectively, thereby forming a parallel link mechanism.

Therefore, the weighing platform 11 is supported by the parallel link mechanism and moves up and down in parallel while maintaining its vertical posture.

Further, 20 is a receiving plate having a hole 20a formed at the lower end of the weighing platform 11, 21 is an L bracket attached to the inner surface of the weighing platform 11 with a screw 22, and 23 is a spring provided on the lower surface of the L bracket 21. A receiver, 24 is a spring receiver placed on the inner surface of the receiver plate 20, 25 is a driver fixed to the lower surface of the spring receiver 24 and placed through the hole 20a, and 26 is a spring receiver between the spring receivers 23 and 24. It is a spring provided.

The spring receiver 24 is urged downward by a protective spring 25 and is in contact with the inner surface of the receiving plate 20 with a predetermined pressure.

A load cell 27 is a lead for guiding the electrical output taken out from the load cell 27 to the measuring circuit. 29 is a support base for supporting the load cell 27; 30 is an adjustment screw attached to the lower surface of the support base 29; 31 is an adjustment nut screwed into the adjustment screw 30; 32 is for penetrating and supporting the adjustment screw 30. The adjustment board 33 is a spring provided between the support base 29 and the adjustment board 32.

This spring 33 has a stronger spring force than the protective spring 26, and urges the support base 29 and the adjustment screw 30 upward.

Therefore, by turning the adjustment nut 31, the vertical position of the load cell 27 relative to the substrate 7 can be finely adjusted, and thereby the height of the weighing rail 10 can be adjusted.

In such a configuration, when the sliding pin 4 rides on the weighing rail 10 from the guide rail 8, the weighing platform 11 is displaced downward by the load, and the load is thereby transferred by the driver 25 via the protective spring 26. It is added to the load cell 27.

Then, the weight can be measured from the electrical output of the load cell 27.

Since the weights of the cup 1, the cup support device 3, the sliding pin 4, the weighing rail 10, the weighing platform 11, and the attached parts are known in advance, subtracting these weights from the total weight yields the weight of the fruit 2. Weight can be measured.

Here, since the guide rail 8 is fixed to the board 7, it is easy to attach the guide rail 8 so that the rail surfaces are aligned with the rail 5, and the difference in level between the guide rail 8 and the rail 5 can be reduced to some extent.

Furthermore, even if there is a step, the guide rail 8 has an inclined surface 8.
Since b and 8c are formed, the sliding pin 4 smoothly transfers between them.

On the other hand, the sliding pin 4 is moved from the guide rail 8 to the weighing rail 10.
When transferring to the weighing rail 10, the weighing rail 10 falls under the load and a step occurs, but the guide rail 8 has an inclined surface 8a.
Since □ and 8a2 are formed, the sliding pin 4 can smoothly move over these inclined surfaces 8a1 and 8a2.
Cup 1 is not subjected to vibrations.

In addition, since the weighing rail 10 is arranged in the elongated hole 9 of the guide rail 8, a large area is provided to support the sliding pin 4 when the sliding pin 4 transfers from the guide rail 8 to the weighing rail 10. The stability of holding the posture of the cup 1 increases.

Note that in the above embodiments, the inclined surfaces were formed at the front and rear of the guide rail, but they may also be formed only at the front.

In this way, according to the weight measuring device according to this invention,
Since the weighing load can move smoothly and stably when transferring between weighing rails, the weighing output is stable and the cups can be fed at high speed.

[Brief explanation of the drawing]

Figure 1 is a front structural view of an embodiment of the weight measuring device according to this invention, and Figure 2 is a plan view.

Claims (1)

[Scope of utility model registration request] A part of the rail that slides and supports the sliding pin to which the weighing load is applied is removed, and the rail is installed in this removed part! In this weight measuring device, a guide rail and a weighing rail are provided which are substantially parallel to each other, and the load is measured when a sliding gun is placed on the weighing rail. is formed to be long in the direction of movement of the rail, and its upper surface is approximately the same height as the upper surface of the rail,
A weight measuring device, wherein a recess is formed in the longitudinal center of the guide rail, at least on the side where the sliding pin enters, the recess having an inclined surface lower than the upper surface, and a weighing device is disposed at the position of the recess.