JPH085443A - Load cell balance - Google Patents

Abstract

PURPOSE:To sufficiently absorb any shock or vibration acting from a pan to a load cell in a load cell balance in which a support frame is fixed to the moving end of the load cell and the pan is supported by means of an elastic member fitted to the end of this support frame. CONSTITUTION:An elastic member 17 is formed in a slender shape in which one end 18 isolated away from a pan 8 while being linked with a support frame 6 and the other end 19 isolated away from the support frame linked with the pan 8 are linked to each other by means of a strain starting part 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load cell scale in which a saucer is connected to a movable portion of a load cell in which a fixed portion is connected to a main body housing.

[0002]

2. Description of the Related Art At present, a load cell balance for calculating the weight of an article as electric data is put into practical use. This load cell scale is provided with a load cell in which a strain gauge connected in a bridge is attached to the strain-flexing part.The fixed end of this load cell is connected to the main body housing and the support frame is connected to the movable end, and the end of this support frame is connected. The tray is supported by an elastic member attached to the section. In such a load cell balance, the strain amount generated in the load cell due to the weight of the articles loaded on the tray is electrically measured by a strain gauge to perform the measurement.

Therefore, a first conventional example of such a load cell balance will be described below with reference to FIGS. 4 and 5. First, in this load cell balance 1, an X-shaped support frame 6 is connected to a movable end 5 of a single load cell 4 having a fixed end 3 connected to a main body housing 2, and the four end portions of the support frame 6 are connected. The tray 8 is supported by the rubber caps 7 which are elastic members individually attached to the tray 8. The tray 8 is provided with a side wall 10 downward from the periphery of the rectangular top plate 9.
Is formed, and the tray 8 is positioned on the support frame 6 by positioning the rubber caps 7 at the four corners inside. Further, the load cell 4 has a strain gauge (not shown) attached to the upper surface and the lower surface of the strain generating portion, and a processing circuit (not shown) is connected to the strain gauge.

In the load cell balance 1 having such a structure, when strain occurs in the strain generating portion of the load cell 4 corresponding to the weight of the article (not shown) loaded on the tray 8, the strain is generated together with the strain generating portion. Since the resistance value of the strain gauge causing the change occurs, the processing circuit calculates the weight of the article based on the analog output of the strain gauge.

In this load cell balance 1, the rubber cap 7 interposed between the support frame 6 and the tray 8 prevents the load cell 4 from being subjected to shock or vibration acting on the tray 8 from the article to be placed. ing.

Further, a second conventional example of the load cell balance will be described below with reference to FIGS. 6 and 7. Regarding the load cell balance 11 illustrated in the second conventional example, the same parts as those in the load cell balance 1 described above as the first conventional example use the same names and reference numerals, and detailed description thereof will be omitted.

First, in this load cell balance 11, a rubber post 12 which is a cylindrical elastic member is mounted on the upper surface of the end portion of the support frame 6, and a concave hole 13 is formed in the upper surface of the rubber post 12. The receiving pin 14 has support pins 15 projecting from the four corners of the lower surface.
Is inserted in the recessed hole 13, the rubber post 1
2 supports the saucer 14.

In the load cell scale 11 having such a structure, the rubber post 12 interposed between the support frame 6 and the tray 14 causes the load cell 4 to receive an impact or a vibration from an article to be placed on the tray 14. Is being prevented. In addition, the tray 14 is positioned on the support frame 6 by inserting the support pin 15 of the tray 14 into the recessed hole 13 of the rubber post 12 mounted on the support frame 6.

[0009]

In the load cell scales 1 and 11 described above, the rubber cap 7 and the rubber post 12 which are elastic members prevent the tray 14 from impacting or vibrating the load cell 4. There is.

However, in the load cell scales 1 and 11 described above, since the impact and vibration acting on the load cell 4 from the tray 14 are absorbed by the physical properties of the rubber cap 7 and the rubber post 12, a great impact or vibration is not generated. Rubber cap 7
It may be difficult to be absorbed sufficiently by the rubber posts 12 and may be transmitted to the load cell 4.

[0011]

A load cell balance in which a fixed end of a load cell is connected to a main body housing, a movable frame is connected to a support frame, and a saucer is supported by an elastic member attached to an end of the support frame, The elastic member is formed in an elongated shape in which one end connected to the support frame and separated from the saucer and the other end connected to the saucer and separated from the support frame are connected by a strain-flexing portion.

[0012]

[Operation] An elongated elastic member in which one end connected to the support frame and separated from the saucer and the other end connected to the saucer and separated from the support frame are connected to each other by the strain-flexing part prevents shock and vibration acting on the saucer. Not only is it absorbed by the physical properties, but it is also structurally absorbed by the strain-flexing part and not transmitted to the support frame.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. Regarding the load cell balance 16 illustrated in the present embodiment, the same parts as those of the load cell balance 1 described above as the first conventional example use the same names and reference numerals, and detailed description thereof will be omitted.

First, in this load cell balance 16, as illustrated in FIG. 2, rubber caps 17 as elastic members are provided at the four ends of the X-shaped support frame 6 connected to the movable end 5 of the load cell 4. The rubber caps 17 are individually mounted, and the tray 8 is supported by these rubber caps 17. Here, the rubber cap 17 of the load cell balance 16 is
A strain generating portion 20 in which an end 18 connected to the support frame 6 and separated from the tray 8 and another end 19 connected to the tray 8 and separated from the support frame 6 are narrowed
It is formed in an elongated shape connected by.

With this construction, in the load cell balance 16, the rubber cap 17 interposed between the support frame 6 and the tray 8 causes the load cell 4 to receive an impact or vibration acting on the tray 8 from an article to be placed. To prevent that. At this time, in the load cell balance 16, the rubber cap 17 not only absorbs the impact and vibration acting on the load cell 4 from the tray 14 by its physical properties but also by the strain-flexing portion 20 structurally, so that a large amount is obtained. It can absorb shock and vibration sufficiently. In addition, this rubber cap 17
Can be removably mounted by simply inserting it into the tip of the support frame 6, so this mounting is simple and the load cell balance 16
Can contribute to improving productivity.

Next, a second embodiment of the present invention will be described below with reference to FIG. Regarding the load cell balance 21 illustrated in this embodiment, the same parts as those of the load cell balance 11 described above as the second conventional example use the same names and reference numerals, and detailed description thereof will be omitted.

First, in this load cell scale 21, a rubber post 22 is mounted on the upper surface of the end portion of the support frame 6, and the tray 14 is supported by this rubber post 22.
Here, at one end 23 of the rubber post 22, a round hole 25 is formed at the bottom of the recessed hole 24 of the upper surface opening, and a screw 26 penetrating the round hole 25 is fastened to the screw hole 27 to support the support frame. It is fixed to the tip of 6. The other end 28 of the rubber post 22 is formed with a round hole 29 penetrating in the vertical direction, and the tray 14 is connected by inserting the support pin 15 into the round hole 29. And
The rubber post 22 of the load cell balance 21 is connected to the support frame 6 and is separated from the receiving tray 14 by one end 2
3 and the other end 28 which is connected to the saucer 14 and is separated from the support frame 6 are connected to each other by a narrowed strain generating portion 30 to form an elongated shape.

In such a structure, in the load cell balance 21, the rubber post 22 interposed between the support frame 6 and the tray 14 allows the load cell 4 to receive an impact or a vibration acting on the tray 14 from an article to be placed. Is being prevented. At this time, in the load cell balance 21, the rubber post 22 not only absorbs the impact and vibration acting on the load cell 4 from the tray 14 by its physical properties but also by the strain-flexing portion 20 structurally. It can absorb even vibrations.

In the load cell scales 16 and 21 described above, the rubber cap 17 and the rubber post 22 which are elastic members are used.
Although it has been illustrated that the strain-flexing portions 20 and 30 are formed in a thinly constricted shape, the present invention is not limited to the above-described embodiment, and, for example, the same as the shape of the load cell 4 penetrates the central portion of the rectangular parallelepiped. It is also possible to realize an elastic member (not shown) or the like in which a hole is formed to serve as a strain-generating portion.

[0020]

As described above, according to the present invention, the fixed end of the load cell is connected to the main body housing, the movable frame is connected to the supporting frame, and the saucer is supported by the elastic member attached to the end of the supporting frame. In the balance, by forming the elastic member in the elongated shape, one end connected to the support frame and separated from the saucer and the other end connected to the saucer and separated from the support frame are connected by a strain-flexing portion. , This elastic member not only absorbs the impact and vibration acting on the load cell from the saucer by its physical properties but also structurally by the strain-flexing portion, so that it is possible to sufficiently absorb even a large impact and vibration. It has an effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view illustrating the relationship among a tray, a support frame, and a rubber cap that is an elastic member of a load cell balance according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view illustrating the overall structure of the load cell balance.

FIG. 3 is a vertical cross-sectional side view illustrating the relationship between the tray of the load cell balance of the second embodiment, the support frame, and the rubber cap that is an elastic member.

FIG. 4 is a vertical cross-sectional side view illustrating the overall structure of a load cell balance of a first conventional example.

FIG. 5 is an exploded perspective view illustrating a support frame and a rubber cap that is an elastic member.

FIG. 6 is a vertical sectional side view illustrating the overall structure of a load cell balance of a second conventional example.

FIG. 7 is a perspective view illustrating the appearance of a rubber post.

[Explanation of symbols]

 2 Main body housing 3 Fixed end 4 Load cell 5 Movable end 6 Support frame 8,14 Saucepan 16,21 Load cell balance 17,22 Elastic member 18,23 One end 19,28 The other end 20,30 Strain section

Claims (1)

[Claims] 1. A load cell balance in which a fixed end of a load cell is connected to a main body housing, a support frame is connected to a movable end, and a saucer is supported by an elastic member attached to an end of the support frame. A load cell balance, wherein the elastic member is formed in an elongated shape in which one end separated from the saucer and the other end connected to the saucer and separated from the support frame are connected by a strain-flexing portion.