JPH0515059Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a measuring device such as a survey meter, and particularly relates to a holding device that can hold a detection part at a predetermined height with respect to the main body of the measuring device. .

[Prior art]

A survey meter focuses on the ionizing effect of radiation, and measures the current, that is, the temporal rate of charge, by discharging the charges collected on the electrodes of an ionization chamber through a high-resistance material, and determines the dose rate. be. Furthermore, survey meters are widely used for general radiation measurements, and are classified into α-ray survey meters, β-ray survey meters, etc. depending on the purpose.

Now, some survey meters have a detection section separated from the main body of the measuring device for ease of handling.In this type of device, the worker holds the detection section in his hand and touches the object to be measured. Measurement is done by bringing it close.

[Problem that the invention attempts to solve]

However, the detection section of a survey meter generally has a drawback that the grip is thick and the hand slips when holding it, making it difficult to hold it. In addition, in the case of an α-ray survey meter, since the range of α-rays is short, the detection part must be kept close to the object to be measured (1 mm) and the distance must be kept constant, but this cannot be done manually. Therefore, it was not possible to maintain a constant distance from the object to be measured, and accurate measurements were not possible. Furthermore, since the measurement is performed in such close proximity, the detection section may be accidentally brought into contact with the object to be measured, resulting in contamination of the detection section.

This invention was made in view of the above circumstances, and an object of the present invention is to provide a holding device that can hold the detection section at a predetermined height with respect to the main body of the measuring device.

[Means for solving problems]

In order to achieve the above object, this invention includes a mounting part attached to the detection part, a support part fixed to the main body of the measuring device and supporting the mounting part in a vertically movable manner, and a support part that supports the mounting part at the predetermined height. The device is characterized by comprising a locking means for locking the device.

[Effect]

With the above-described configuration, the detection section is moved up and down, brought to a predetermined height, and stopped at that height by the locking means.

〔Example〕

Embodiments of this invention will be described below with reference to the drawings.

1 and 2 are a partially cutaway front view and a plan view, respectively, showing the structure of a holding device according to a first embodiment of this invention. In this figure, 1 is a main body of the measuring device (hereinafter simply referred to as the main body), and a meter 2, dials 3, 4, etc. are provided on the top surface of the main body. Further, a handle 5 is fixed to the upper surface of the main body 1. On the other hand, 6 is a detection section, and the main body 1
and a cord (not shown) having a length of approximately 1 mm. The detection section 6 has a substantially cylindrical shape, and the diameter of the lower end 6a becomes larger toward the detection surface 6c, and the upper end 6 of the detection section 6
A ring having an annular groove 7a formed on the lower surface is fitted in b.

Now, a bar 10 is attached to the handle 5, and a screw 1 is attached to the handle 5.
1 and 11, it is fixed horizontally. One end 10a of this bar 10 protrudes from the left end 1a of the main body 1, as shown in FIG.
A plate-shaped support 12 is fixed vertically to the support 12, and a stopper 13 is fixed vertically to the lower end 12a of the support 12. In this case, one end 13a of the stopper 13 is connected to the support 12 as shown in FIG.
It protrudes slightly to the left from
The other end 13b of the bar 10 is in contact with the upper left end 1a of the main body 1 to prevent the bar 10 from being bent.

The support 12 also has a screw hole 12b.
is formed (see FIGS. 3 and 4), and a spring plunger 15 having a retractable pin 14 is screwed into this screw hole 12b. Further, a nut 16 is screwed into this spring plunger 15, and the tightening action of this nut 16 causes the spring plunger 15 to tighten to the support 1.
It is fixed at 2. In addition, support 12 has
Two parallel guides 17, 18 are fixed by screws 19, 19, . . . . One side 17 of these guides 17 and 18 facing each other
a, 18a are each inclined at a predetermined angle,
As a result, these guides 17 and 18 and the support 12 create a dovetail groove 2 whose groove width becomes wider toward the bottom.
0 is formed. A slide plate 21 having a trapezoidal cross section is fitted into this dovetail groove 20 so as to be slidable in the vertical direction but immovable in the horizontal direction, and the slide plate 21 cannot be pulled out in the downward direction by one end 13a of the stopper 13. It's getting old.
Further, this slide plate 21 has three holes 21a, 21b, and 21c formed at equal intervals in the vertical direction, and the pin 14 of the spring plunger 15 is located in one of these holes 21a, 21b, and 21c.
By fitting the slide plate 21
is designed to be locked at a predetermined height.
Further, the lower end portion 21d of the slide plate 21
A holder 22 having an arc-shaped plane is fixed to the holder 22, and plates 24, 24, which absorb shocks during attachment/detachment, are fastened to the holder 22 with screws 23, 23, and the It is fixed by sandwiching the detection part 6. On the other hand, the slide plate 21
A step 21f is formed at the upper end 21e, and this step 21f forms the groove 7 of the ring 7 fitted in the detection section 6.
The detection part 6 is vertically supported by being fitted into the part a.

In the above configuration, the height of the detection section 6 is adjusted according to the height of the object to be measured. In this case, by applying an upward (or downward) force to the detection section 6, the pin 14 sinks into the spring plunger 15, allowing the detection section 6 to move easily.
Then, the pin 14 is inserted into the adjacent hole 21a or 21.
By fitting into b or 21c, the slide plate 21 is locked and the detection part 6 is held at a predetermined height.

In this way, the detection section 6 is held at a height that brings the detection surface 6c close to the object to be measured.

Next, FIGS. 5 and 6 are a front view and a plan view, respectively, showing the structure of a holding device according to a second embodiment of this invention, and the same parts as in FIGS. 1 and 2 are the same. Reference numerals are given and explanations thereof are omitted. In these figures, a support member 30 is fixed to the handle 5. This support member 30 is
It has a fixing part 32 fixed to the handle 5 with screws 31, 31, and one end 32 of this fixing part 32.
a projects from the left end 1a of the main body 1 shown in FIG. This one end 32a has a U-shaped notch 32.
b is formed, and two plate-shaped support frames 33 and 34 are integrally provided on both sides of this notch 32b. These support frames 33 and 34 have the same shape, are erected vertically, and are arranged in parallel. Further, a spacer 35 is inserted between these support frames 33 and 34, and a stopper 36 is fixed to the lower end 35a of this spacer 35. As a result, the spacer 35 maintains the parallel positional relationship between the support frames 33 and 34.
Furthermore, the stopper 36 comes into contact with the upper left end 1a of the main body 1, thereby preventing the fixing portion 32 from bending.

The support frames 33 and 34 are connected to the stopper shaft 3.
7 and shaft 38, and shaft 3
A lever 39 is rotatably fitted in the lever 8.
Further, sleeves 40, 40 are fitted onto the shaft 38, and the lever 39 is positioned at the center of the shaft 38 by the sleeves 40, 40 (see FIG. 7). In this case, shaft 38
The limit of rotation in the counterclockwise direction is the stop shaft 37.
The clockwise limit of the shaft 38 is determined by the upper end 35b of the spacer 35, so that the rotation range of the shaft 38 is α shown in FIG.

Further, each of the support frames 33 and 34 has an end surface 33.
Vertical grooves 33b, 34 near a, 34a.
b are formed facing each other, and these grooves 33
A plate-shaped slide plate 41 is fitted into b and 34b so as to be slidable in the vertical direction. This slide plate 41 has four scales 4 arranged at approximately equal intervals.
2, 43, 44, and 45 are attached in order from above, and these scales 42 to 45 are attached to the lever 39.
It is starting to interfere with In this case, the scales 42 and 45 are longer than the scales 43 and 44, and these scales 42 and 45 interfere with the lever 39 and the stopper shaft 37 at the same time. As a result, the vertical sliding range of the slide plate 41 is determined by these scales 42 and 45. Further, the slide plate 41 is configured to be locked at a position where the scales 43, 44 and the lever 39 interfere within the above-mentioned sliding range. That is, when the lever 39 is in contact with the stopper shaft 37, the scales 43, 44
and the tip 39a of the lever 39 interfere, and the scale 43 or 44 comes into contact with the upper end of the tip 39a, and the slide plate 41 is locked, while the lever 39 is brought into contact with the upper end 35b of the spacer 35. In the state, the tip 39a of the lever 39 is
It is lifted to a position where it does not interfere with the scales 43 and 44, and the slide plate 41 becomes movable within the sliding range.

Further, a step portion 41b is formed on the upper end 41a of the slide plate 41, and this step portion 41b is fitted into the groove 7a of the ring 7 fitted into the detection section 6. Furthermore, the holder 22 shown in the first embodiment described above is fixed to the lower end portion 41c of the slide plate 41.

In the above configuration, the height of the detection section 6 is adjusted according to the height of the object to be measured. In this case, the detection unit 6 is locked in three stages at positions where the scales 42, 43, and 44 interfere with the lever 39, and the detection unit 6 is held at a height that brings the detection surface 6c close to the object to be measured. I can do it.

Next, FIGS. 7 and 8 are a front view and a plan view, respectively, showing the configuration of a holding device according to a third embodiment of the invention, and are similar to the first embodiment shown in FIGS. 1 and 2. Identical parts are designated by the same reference numerals and their explanations will be omitted. In these figures, a bar 50 is horizontally fixed to the handle 5 with screws 51, 51. One end 50a of this bar 50 is the left end 1a of the main body 1, as shown in FIG.
A rectangular support 52 is vertically fixed to one end 50a of the support 52, and a stopper 53 is provided at the lower end 52a of the support 52, with its surface 53a abutting the lower end 52a and extending at right angles to each other. It is fixed to do so. in this case,
One end 53b of the stopper 53 is located at the left end 1a of the main body 1.
The bar 50 comes into contact with the upper part and prevents the bar 50 from being bent.

In addition, on both sides of the support 52 in the longitudinal direction,
Plate-shaped support frames 54 and 55 are each fixed.
These support frames 54 and 55 are arranged parallel to each other, and a shaft 57 is pivotally supported by these support frames 54 and 55 via bearing bushes 56 and 56. One end 57a of this shaft 57
A hole 57b is bored in the hole 57b as shown in FIG.
As shown in FIG. 9, a pin 58 is inserted into this hole 57b in a manner that cannot be removed, while a handle 59 is attached to the other end 57c of the shaft 57. Due to this, the shaft 57 cannot be pulled out in the axial direction. Further, a pinion 60 is attached to the shaft 57 at the center in the axial direction.

Further, a screw hole 55a is formed in the support frame 55 (see FIG. 10), and a spring plunger 62 having a pin 61 that can be projected and retracted into the screw hole 55a is screwed into the screw hole 55a.

Further, each of the support frames 54 and 55 has an end surface 54.
Vertical grooves 54c, 55 in the vicinity of b, 55b.
c are formed facing each other, and these grooves 54
A plate-shaped slide plate 63 is fitted into the parts c and 55c so as to be slidable in the vertical direction. A rack 65 is attached to the slide plate 63 at the center in the width direction with a screw 64.
is meshed with the pinion 60. By rotating the handle 59, the pinion 60 rotates, the rack 65 moves up and down, and the slide plate 63 moves up and down accordingly. In this case, the lower end 65a of the rack 65 comes into contact with the other end 53c of the stopper 53, making it impossible for the slide plate 63 to be pulled out downward. The rack 65 also has through holes 66, 6 perpendicular to the longitudinal direction.
7 and 68 are bored at equal intervals in the vertical direction, and the pin 61 of the spring plunger 62 is fitted into these through holes 66, 67, 68.

Further, a stepped portion 63b is formed on the upper end portion 63a of the slide plate 63, and this stepped portion 63b is fitted into the groove 7a of the ring 7 fitted into the detection portion 6. Furthermore, the lower end 63c of the slide plate 63 is provided with the holder 2 shown in the first embodiment described above.
2 is fixed.

In the above configuration, by rotating the handle 59, the pinion 60 rotates, and the detection unit 6 moves up and down. The detection unit 6 detects that the pin 61 of the spring plunger 62 is connected to the through holes 66, 67,
68, it is held at a predetermined height.

[Effect of idea]

As explained above, according to this invention, the mounting part is attached to the detection part, the support part is fixed to the main body of the measuring device and supports the mounting part in a vertically movable manner, and the mounting part is fixed to the predetermined height. Since the detection surface is provided with a locking means to be stopped by the object to be measured, the detection surface can be held at a position close to the object to be measured in accordance with the height of the object to be measured, and accurate measurement can always be performed.
Moreover, when measuring a plurality of objects to be measured at the same height, the measurement time is shortened.

Moreover, according to this invention, in addition to the above-mentioned effects, there is no contamination of the detection section.The measuring device, including the main body and the detection section, can be held with one hand.

The main body and detection part can be easily attached and detached.

Effects can be obtained.

[Brief explanation of drawings]

1 and 2 are a partially cutaway front view and a plan view, respectively, showing the structure of a holding device according to a first embodiment of the invention, and FIGS. 3 and 4, respectively, show the structure of the main parts of the holding device. Cross-sectional views shown in Figures 5 and 6.
The figures are a front sectional view and a plan view showing the structure of a holding device according to a second embodiment of the invention, FIG. 7 is a sectional view showing the structure of the main parts of the holding device, and FIGS. 8 and 9 are , a front view and a plan view showing the structure of a holding device according to a third embodiment of this invention, and a tenth embodiment.
The figure is a sectional view showing half of the main part of the holding device. 1...Main body (measuring device main body), 6...Detection section,
10...Bar, 12...Support, 17,18...
...Guide (the above 10, 12, 17, 18 are supporting parts), 14... Pin, 15... Spring plunger (the above 14, 15 are locking means), 21... Slide plate (mounting part), 30... Support member (support part), 39... Lever (locking means), 41...
...Slide plate (mounting part), 50...Bar,
54, 55...support frame (the above 50, 54, 55 are support parts), 61...pin, 62...spring plunger (the above 61, 62 are locking means), 63...
...Slide plate (mounting part).

Claims (1)

[Scope of utility model registration request] A holding device that holds a detection part at a predetermined height with respect to a measuring device main body, comprising: a mounting part attached to the detection part, and a mounting part fixed to the measuring device main body;
A holding device comprising: a support part that supports the mounting part so as to be movable up and down; and a locking means that stops the mounting part at the predetermined height.