JPS6363053B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is configured such that each one of a pair of storage devices can be alternately and selectively linked to each one of a pair of members required to be weighed via one main weighing rod. , a chevron-shaped object distribution member for distributing objects to be weighed to both storage devices is configured to have a weight balance in a left-right balanced state, and a center portion of this distribution member is integrated with the main rod. This invention relates to a continuous metering device supported by a knife edge at the upper end of a continuous arm.

The continuous weighing device with the above configuration was previously proposed by the present applicant, and even after a predetermined measurement and storage is completed in one storage device, the required measurement and storage is continued in the other storage device. At the same time, during this time, the storage device that finished weighing and storing is returned to its empty initial state, making it possible to carry out weighing and storing multiple times continuously without interrupting the flow of the material to be weighed, making it extremely efficient. perform well.

The chevron-shaped sorting member is configured to distribute the information to the left and right storage devices based on the fact that the intersecting ridge line (the fulcrum part by the knife edge) of the falling slope inclined in the opposite direction is laterally displaced by the tilting of the arm accompanying the main rod. The allocation ratio is gradually changed. In this action, it is necessary to keep the inclination angles of both the left and right downward slopes constant in order to keep the flow on the downward slope almost constant. Therefore, a knife edge is used to support the chevron-shaped distribution member, and the slope of the slope is It is constructed to maintain a balance between the left and right sides with weight balance. That is, it is very suitable for distributing objects to be weighed while changing the distributing ratio to keep the distributing member constant in its posture and move in parallel regardless of the lateral displacement of the intersecting ridge lines. In order to balance the weight of this chevron-shaped distribution member, a fairly heavy weight was used to stabilize the posture, but (a)
Vibration and deflection experienced by the arm integrated with the main rod during left and right metering storage switching operations, and (b) distribution due to load fluctuations on the lower slopes of both the left and right flows when switching from a high flow state to a small flow state. The reality is that the distributing member sways due to the pendulum movement of the member, or disturbance factors such as (f) wind or stray vibrations on the floor, which prevents its stable posture from being reliably stabilized.

In view of the above circumstances, it is an object of the present invention to ensure stabilization of the distribution member's posture, thereby improving measurement accuracy.

First, the outline of the structure and operation of a continuous measuring device to which the present invention is directed will be explained based on FIGS.

As mentioned at the beginning, this type of continuous weighing device uses one of the pair of storage devices B, B alternately to each one of the pair of weighing members C, C via one main weighing rod 3. The distribution member 2, which has a chevron shape for distributing objects to be weighed to both the storage devices B and B, is configured to be selectively linked and switchable, and is configured to have a left-right balanced state with a weight balance. 2 is basically supported by the upper knife edge 5a of the arm 5 which is integrally connected to the main rod 3. Reference numeral 1 denotes a flow outlet to be weighed disposed above the sorting member 2, 4 a fulcrum shaft of the main rod 3, 6 a tare bag received and supported by the storage device B, and 7 a tare bag extending downward from the storage device B. The main rod 3 is engaged with and supported by the supporting member. The components C required for measurement include a balance weight 9 supported by a holder 10 attached to the main rod 3, an arm member 11 for separating and lifting the balance weight 9 from the holder 10, and one of each of the pair of left and right arm members 11, 11. The main parts include an operating lever 16 for switching between a state in which one actuates the other at the same time and a state in which the other does not act, and vice versa. Reference numeral 13 denotes a pivot shaft of the arm member 11, which is attached to the fixed base 12. A cover 15 is pivoted on an axis directly above and parallel to the fulcrum shaft 4 of the main rod 3 and is linked to the arm member 11 via a link 14, and a pair of abutment members 19 are provided upright from the bar 15. , 19, and the cam 18 and the operating lever 16 are integrally connected to each other. 17 is lever 1
6 pivot axis. A pin 7a projects from the support member 7 and is supported in the recess 15a of the bar 15. 20 is an auxiliary weight attached to the main rod 3 via a cable 21, and 23 is a swing link linking the fixed frame 22 and the support member 7.

A continuous weighing device with the above-mentioned configuration is:
It operates in cycles like A to D in FIG. However, Figure 1 A to D show half cycles.

FIG. 1A shows the initial state in which the object to be weighed is allowed to flow down into the tare bag 6 on the right side. In this case, by swinging the lever 16 to the right, the bar 15 is tilted via the eccentric cam 18 and the contact members 19, 19.
The pin 7a of the left side support member 7 is lifted up in the recess 15a on the left side of the bar 15 to lift up the entire left side storage device B, and at the same time, the engagement and contact between the left side support member 7 and the left side pivot shaft 8 is released, and the left side The left arm member 11 is swung downward via the link 14 to transfer and support the left balance weight 9 to the left holder 10, and at the same time the right arm member 1 is moved via the right link 14.
1 is swung upward and the right balance weight 9 is supported by the right arm member 11, thereby eliminating the load on the right holder 10. The main rod 3 is then tilted to the left side position, and the right side balance weight 9 is supported by the right arm member 11. The emphasis shaft 8 is brought into engagement contact with the right support member 7, and the distribution member 2 is positioned at the leftmost end of its left-right movement range via the support arm 5.

In this state, the entire amount of the object to be weighed from the flow outlet 1 is flowing down to the right tare bag 6.

As the weight continues to flow down to the right tare 6 and its weight increases, the main rod 3 moves the right storage device B around the right axis of emphasis 8 so as to move downward while maintaining balance with the left balance weight 9. Gradually oscillates,
Along with this, the sorting member 2 gradually moves to the right, and the object to be weighed from the flow outlet 1 is also flowed down to the left tare 6, and the ratio of distribution to the left tare 6 and the right tare 6 is reduced. However, the right side gradually decreases and the left side increases. During this time, the left cable 21 is extended as the main rod 3 is tilted.

For example, the distribution ratio between the right side and the left side is 10%:90
%, the left cable 21 is set to fully extend, and at this time, the left auxiliary weight 2
0 comes to work as a balance. Therefore, until the object to be weighed flows down by the weight of the weight 20,
This 10%:90% distribution state shown in FIG.

Then, before long, the main rod 3 slowly begins to tilt again, and the sorting member 2 slowly begins to move again. Then, when this re-movement is considerably small, the distributing member 2 moves rapidly and at an accelerated rate to the right, and enters the fully closed state as shown in FIG. 1C.

At this time, the left main axis 8 is attached to the left support member 7.
is in a state of engagement contact or close to it.

Next, after removing the right tare bag 6 which has reached a predetermined amount of the object to be weighed and replacing it with a new empty tare bag 6, by swinging the lever 16 to the left, As shown, the eccentric cam 18, the abutment member 19,
19. Swing the left arm member 11 upward via the bar 15 and links 14, 14 to remove the left balance weight 9 from the left holder 10, and at the same time, swing the right arm member 11 downward to remove the right balance weight. 9 is transferred to the right holder 10. Also, bar 1
The entire right side storage device B is lifted up by the right side recess 15a of No. 5 and the pin 7a. At this time, the attitude of the main rod 3 does not change or changes only slightly.
Therefore, the sorting member 2 is in a position to allow the entire amount of the object to be weighed to flow down to the left tare bag 6. Thereafter, weighing is performed using the left storage device B and the right balance weight 9 with the left weight axis 8 as a fulcrum.

That is, the storing and weighing action for both the left and right tares 6, 6 is performed continuously without interrupting the flow of the objects to be weighed.

When weighing is being performed in the lower storage device B, the objects to be weighed are flowed down to one of the storage devices B by the distribution action of the distribution member 2. This state continues until the flow to the other storage device B is completely closed, and finally reaches 100%. Replace the tare bag 6 of the other storage device B that has completed the specified weighing, and then turn the lever 1.
In the state before switching to 6 and rocking, it is fully open (100
%) condition continues. When the target storage device B is moved to the metering state by switching the lever 16, the distribution member 2 gradually moves as the main rod 3 tilts, and the flow rate is changed.

Next, one embodiment of the present invention will be explained based on FIG. 2.

That is, the gist of the present invention is that an elastic friction mechanism A for preventing the distributing member 2 from wobbling is interposed between the distributing member 2 and an arm having a knife edge 5a that supports it, that is, an arm 5 integrated with the main rod 3. 2, a preferable elastic friction mechanism A is a symmetrical friction member in which the friction surface 24 against the lower edge of the knife edge 5a is formed into an arc surface centered on the upper end fulcrum of the knife edge 5a. 25, and springs 26, 26 arranged symmetrically to urge the friction member 25 upward.
A flat plate 27 is shown which is integrally and symmetrically connected to the distribution member 2 to receive the reaction force of the springs 26, 26. 28 is a flat plate 27 in order to balance the distribution member 2 left and right.
It is a weight fixed with screws 29, 29 at the bottom. Reference numeral 30 denotes a flat plate suspended horizontally above the flat plate 27, and the lower ends of the rods 32, 32 are screwed into the weight 28 and fixed with lock nuts 31. , 32, the flanges on both sides of a U-shaped friction member 25 are fitted in a swingable manner, and the springs 26, 26 are fitted on both rods 32, 32, and nuts 33, 33 for receiving one end thereof are fitted. They are screwed onto rods 32, 32, and are configured to finely adjust the elastic force of the springs 26, 26 by rotating the nuts 33, 33. Instead of using the elastic force adjusters 33, 33, the spring 2
6 and 26 may be replaced with ones of different strength. 3
4 and 34 are locking nuts. Also, 35,3
Reference numeral 5 denotes a stopper screwed onto both side plate portions of the friction member 25, which defines the upper limit of the relative deflection angle of the knife edge 5a with the distribution member 2 by contacting the side surface of the knife edge 5a. This stopper 35,3
5 can be freely moved in and out by rotation, and the maximum deflection angle can be finely adjusted. As shown in Fig. 3, the arm 5 is made by bending a pipe into a U-shape and flattening a portion of the horizontal part of its upper side into a vertically elongated shape, and a knife edge 5a is screwed to the flat surface. . Since the lower end of the flattened pipe comes into sliding contact with the friction surface 24, the lower end of this pipe is the lower edge of the knife edge 5a. While preventing the distributing member 2 from wobbling with the braking effect based on this frictional action, the distributing member 2 is moved in parallel to maintain a left-right balanced posture against the tilting of the arm 5 that tilts together with the main rod 3. That is, relative tilting with respect to the arm 5 is allowed. Since the friction surface 24 is a circular arc surface centered on the upper end fulcrum of the edge 5a, the springs 26, 26 do not expand or contract, and the braking effect is kept constant regardless of the relative tilting of the arm 5 and the distribution member 2.

Compared to the above-described one shown in FIG. 2, a simpler structure without the frictional force adjustment function is also useful, and examples thereof are shown in FIGS. 4 to 8. Figure 4 shows the leaf spring 36
The leaf spring 36 is made of metal or plastic, and its both ends are screwed to the flat plate 27. In FIG. 5, an elastic wire 37 such as a piano wire is used and its both ends are screwed together. 6 and 7 are of a cantilever type, the former using a leaf spring 38, and the latter using an elastic wire 39. It is also effective to construct the stoppers 40, 40 by bending them as shown in FIG. This point also applies to other aspects. In the case of the elastic wires 37 and 39, it is preferable to arrange a plurality of them in parallel.

Although the embodiments have been described above, the gist of the present invention is to provide an elastic friction mechanism between the distributing member and its support arm for preventing wobbling of the distributing member in the continuous weighing device having the above-mentioned configuration. It is possible to maintain parallel movement of the distributing member in left-right balance with respect to the tilting of the arm accompanying the main rod, that is, to allow relative tilting with the arm. Also, the distribution member is prevented from wandering due to the disturbance factors (a), (b), (c), etc. mentioned above, based on the braking effect on the distribution member by the elastic friction mechanism,
It is possible to sufficiently stabilize the posture of the distribution member and improve measurement accuracy.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the continuous measuring device according to the present invention, and FIGS. 1A to 2D are front views showing a schematic configuration and sequential operations, FIG. 2 is a cutaway front view of main parts, and FIG. 3 is an arm. Perspective views of Figures 4 to 8
Each figure is a schematic front view of an application example. A...Elastic friction mechanism, B...Storage device, C...
Parts required for measurement, 2... Sorting parts, 3... Main rod,
5...Arm, 5a...Knife Edge, 24...
Friction surface, 25...Friction member, 26...Spring, 27...Flat plate, 33...Elastic force adjuster.

Claims (1)

[Scope of Claims] 1. Each one of the pair of storage devices B, B can be alternately and selectively connected to each one of the pair of members C, C that require measurement via one main rod 3 for measurement. The chevron-shaped object distribution member 2 for distributing objects to be weighed to both storage devices B, B is configured in a left-right balanced state with weight balance, and the center of this distribution member 2 is A continuous weighing device in which a part is supported by an upper knife edge 5a of an arm 5 integrally connected to the main rod 3, and a device is provided between the distributing member 2 and the arm 5 to prevent the distributing member 2 from wobbling. A continuous measuring device characterized in that an elastic friction mechanism A is interposed therebetween. 2 The elastic friction mechanism A includes the knife edge 5
A symmetrical friction member 25 whose friction surface 24 against the lower edge of the knife edge 5a is formed into an arc surface centered on the upper end fulcrum of the knife edge 5a;
The springs 26, 26 arranged symmetrically to bias the spring 5 upward, and the springs 26, 2
6. The continuous weighing device according to claim 1, further comprising a flat plate 27 that is integrally and symmetrically connected to the distribution member 2 as a reaction force receiver of the distributing member 2. 3 The elastic friction mechanism A includes the spring 26,
The continuous measuring device according to claim 2, comprising 26 elastic force adjusters 33, 33.