JPH10267821A - Balance column device of infrared moisture meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a balance column device without backlash by constituting the balance column device for receiving a sample dish of a balance device for infrared moisture meter by a pair of columnar members sliding each other relatively by means of a metal bearing and by keeping the working accuracy of constituent parts easily. SOLUTION: A supporting column 41 of this electronic device 4 which is erected on a load detection table 53 of a balance device is inserted slidably into a bearing hole 43 provided on the lower end of a dish receiving column 42 by means of bearing metals 45 and 46. A spring is provided between the lower end of the column 42 and the load detection table 53 to deflect it to the upperside. This structure keeps the working accuracy of constituent parts of the device 4 easily, so that the device 4 can be assembled without backlash.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a balance support device for a balance device of an infrared moisture meter.

[0002]

2. Description of the Related Art An infrared moisture meter heats a sample placed in a sample dish with an infrared lamp, a far-infrared heater, or the like to evaporate the water content of the sample, and measures the sample before and after evaporation with a balance device. It measures moisture. As shown in FIG. 3, a conventional balance support device 20 for a balance device of an infrared moisture meter has a tapered support support 21 provided on a load detection table 21 of the balance device, and a tapered hole of a dish support column 22 is fitted and fixedly held. Further, the plate support 23 is slidably supported on the plate support 22 and the plate support 23 is biased upward with a spring 24 interposed between the plate support 22 and the plate support 23. Had. The structure of the balance support device 20 facilitates the assembly of the balance device, and the spring 24 can absorb an impact load or the like, so that the balance device is protected from insufficient overload applied to the balance device, and failure and damage are prevented. Is possible.

However, in this conventional apparatus, as described above, the tapered portion of the dish support column is fixed to the tapered portion of the support column by closely fitting the tapered hole, but these columns are manufactured by, for example, molding. Therefore, it is difficult to accurately manufacture the support post taper portion and the plate receiving support taper hole due to the shrinkage of the material. Therefore, the support post taper portion and the plate receiving support taper hole are accurately aligned with each other. There is a drawback that the two columns are not complementary, and when the balance columns are assembled, the two columns are not tightly fitted to each other and play occurs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the conventional balance column apparatus of the infrared moisture meter. Therefore, the present invention provides a support column and a dish receiving column. The present invention provides a balance support device for a balance device of an infrared moisture meter, which is fitted without play.

[0005]

According to the present invention, in order to achieve the above object, a balance support device of a balance device of an infrared moisture meter is provided with a support support planted on a load detection table and a support support. In a balance support device having a tray support slidably held, and elastic means for biasing the tray support up, the support support is, for example, a metal column, and is provided in a cylindrical hole of the plate support. A balance support apparatus is provided, wherein the elastic means is slidably held and is provided between the load detection table and the dish support support.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail in the form of an embodiment with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of an infrared moisture meter according to an embodiment of the present invention. A sample placed in a sample dish 2 is heated and dried by an infrared lamp 1. The sample dish 2 is supported by the balance device 5 via the dish receiver 3 and the balance support device 4. Electric systems such as a display unit and a calculation circuit are omitted. The reference numeral 6 indicates the sample dish 3
And a windshield for rectifying convection around the sample dish 3.

FIG. 2 is an enlarged sectional view showing the balance support device 4 of the present invention shown in FIG. 1 in detail.

The balance support device 4 projects into the main body of the balance device 5 through an opening provided in the top plate 51 of the balance device 5, and is surrounded by a dust cover 52 provided on the top plate 51. The support column 41 of the balance column device 4 is implanted on the load detection table 53 of the balance column device 5.
1 is fitted with a plate receiving column 42 slidably in the vertical direction. Specifically, the support column 41 is fitted through a bearing metal 45 and 46 into a bearing hole 43 provided in the column axial direction from the lower end of the plate support column 42. The upper portion of the support column 41 is smaller in diameter than the lower portion, and accordingly, the upper portion of the bearing hole 43 of the plate support column 42 is smaller in diameter than the lower portion. Therefore, the size of the bearing metal 45 is smaller than the size of the bearing metal 46.

For example, molding can be considered as a means for manufacturing the dish support column 42 at low cost. In this case, the circumferential wall surface of the bearing hole 43 is tapered to make it easy to remove from the mold. It is desirable to do.

In this embodiment, the circumferential wall surface of the bearing hole 43 excluding the bearing metal insertion portion is tapered, and the positioning of the two bearing metals 45 and 46 at the insertion portion is ensured. Therefore, it has a stepped shape. For these reasons, the size of the bearing metal 45 is smaller than the size of the bearing metal.

A spring 47 is disposed at a portion of the support column 41 protruding into the balance device 5 main body, that is, at a portion between the lower end of the plate receiving column 42 and the load receiving table 53. For details,
The lower end of the spring 47 expands the diameter of the upper part of the hole 54 in which the support column 41 is planted, and the spring 47 is connected to this portion via a retainer 48.
And the upper end of the spring 47 is
The lower end of the dish support column 42 is arranged via the.

The support column 41 includes a bearing metal 45,
When the sample dish 2 is placed on the dish receiver 3, it can slide in the bearing hole 43 of the dish support column 42 via 46, and the dish support column 42 is biased upward by the spring 47. In this case, the shock generated at the time of overload or insufficient overload is absorbed to prevent the shock from being directly applied to the balance device 5.

According to the present invention described above, the support column is cylindrical, and it is much easier to improve the dimensional accuracy in processing than the conventional tapered column, and the dimensional control is also easier. is there.

[0014] Further, since the plate receiving column side fitted to the supporting column is configured to be slidable via a JIS standard bearing metal whose dimensional accuracy is guaranteed, the conventional tapered shape is used. It is possible to provide a balance support device in which the dimensional accuracy does not always vary as compared with the combination of the balance devices and there is no backlash.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an infrared moisture meter to which the present invention is applied.

FIG. 2 is an enlarged sectional view of the balance support device shown in FIG. 1;

FIG. 3 is an enlarged sectional view of a conventional balance support.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infrared lamp 2 Sample dish 3 Dish receiver 4 Balance support device 5 Balance support device 41 Support support 42 Balance support 43 Bearing hole 45 Bearing metal 46 Bearing metal 47 Spring 48 Retainer 49 Retainer 51 Top plate 52 Dust cover 53 Load detecting stand 54 Hole

Claims (3)

[Claims] 1. A balance support device provided on a load detection table of a balance device of an infrared moisture meter, comprising: a support column implanted on the load detection table; and a tray support slidably held by the support column. In a balance column device having a column and an elastic means for biasing the plate receiving column upward, the support column is a cylinder, and is slidably held in a cylindrical hole of the plate column, and the elastic support is provided. The balance support device, wherein the means is provided between the load detection stand and the dish receiving support. 2. The balance support device according to claim 1, wherein the dish support support is slidably held on the support support via a bearing metal. 3. The balance support device according to claim 2, wherein the support support has a two-stage configuration of a small-diameter cylindrical upper portion and a large-diameter circular lower portion, the distal end portion of which is reduced in diameter. A balance column device provided on both the small-diameter upper portion and the large-diameter lower portion.