JP5100319B2 - Rain gauge - Google Patents

Description

  The present invention relates to a rain gauge, particularly a transparent large-diameter measuring tube formed in a bottomed cylindrical shape extending in the vertical direction, and a large-diameter measuring tube formed in a bottomed cylindrical shape smaller in diameter than the large-diameter measuring tube. A transparent small-diameter measuring tube that is detachably fitted inside, and a small-diameter measuring tube that receives rainwater when the small-diameter measuring tube is fitted to a large-diameter measuring tube, A rain receiving means for guiding rainwater, and the peripheral wall of the small-diameter measuring tube has an inner rainfall scale for reading the rainfall from the water surface in the small-diameter measuring tube, and the peripheral wall of the large-diameter measuring tube has a large Outside rain scales are provided for reading the amount of rainfall from the water surface in the diameter measuring tube, and a communication hole is provided above the small diameter measuring tube to allow the stored water of the small diameter measuring tube to overflow into the large diameter measuring tube. Related to rain gauges.

  The rain gauge is conventionally known as shown in Patent Document 1 below.

In this conventionally known method, rainwater is first stored in the small diameter measuring cylinder during rain, and when the amount of storage (rainfall) exceeds a predetermined value, it overflows from the small diameter measuring cylinder and is stored in the large diameter measuring cylinder. In other words, during the period from the start of falling until the rainfall exceeds a predetermined value, it starts to fall from the water surface in the small-diameter measuring cylinder based on the inner rain scale with a large scale interval on the peripheral wall of the small-diameter measuring cylinder. After the rainfall has exceeded the specified value and the overflow has started, the outer surface of the large-diameter measurement cylinder has a small interval between the scales, and the water surface in the large-diameter measurement cylinder The rainfall is roughly read. Further, the outside rain scale of the large diameter measuring tube is set to display the normal rainfall amount with the small diameter measuring tube fitted in the large diameter measuring tube.
JP-A-7-229974

  In the above-mentioned conventionally known rain gauge, the small diameter measuring tube is fitted in the large diameter measuring tube and has a double tube structure. Therefore, even if the large diameter measuring tube itself is transparent, the small diameter measuring tube on the inside thereof is measured. There was a problem that the water surface of the cylinder was difficult to see and difficult to understand.

  In the conventional rain gauge, the outer rain scale of the large diameter measuring tube is set to display the normal rainfall amount with the small diameter measuring tube fitted in the large diameter measuring tube. A small diameter measuring tube must be fitted in the tube, and if the small diameter measuring tube is not full, it is not possible to measure the amount of rainfall in the large diameter measuring tube. In the fitted state, the small diameter measuring tube is transparent through the large diameter measuring tube. As a result, it was difficult to see the water surface in the large diameter measuring tube.

  The present invention has been made in view of such a situation, and an object thereof is to provide a rain gauge having a simple structure which can solve the above-mentioned problems of conventional devices.

In order to achieve the above object, the invention of claim 1 is formed in a transparent large-diameter measuring tube formed in a bottomed cylindrical shape extending in the vertical direction and a bottomed cylindrical shape having a smaller diameter than the large-diameter measuring tube. A transparent small diameter measuring tube that is detachably fitted to the upper end opening of the large diameter measuring tube, and a small diameter measuring tube in a state where the small diameter measuring tube is fitted to the large diameter measuring tube in response to rainwater, In the non-fitted state, it is provided with rain receiving means for guiding rainwater to the large diameter measuring tube, and the inner wall scale for reading the rainfall from the water surface in the small diameter measuring tube is also provided on the peripheral wall of the small diameter measuring tube. The peripheral wall of the large-diameter measuring tube is provided with an outside rain scale for reading the amount of rainfall from the water surface in the large-diameter measuring tube. in rain gauge communicating hole for overflow is provided in the diameter measuring cylinder, diameter meter The cylinder is formed long and downward so that the bottom wall bottom surface of the small diameter measurement tube abuts on the top surface of the bottom wall of the large diameter measurement tube when fitted to the large diameter measurement tube. Includes a first float for floating and displaying the water surface in the large-diameter measuring cylinder, and the small-diameter measuring cylinder is floated on the inner peripheral surface of the small-diameter measuring cylinder. A second float for displaying the water surface is fitted so as to be slidable in the vertical direction, and a circular hole for loosely penetrating the small diameter measuring tube is formed at the center of the first float .

  The invention of claim 2 is characterized in that, in addition to the feature of claim 1, the outside rain scale is set so as to display a normal rainfall in the non-fitted state.

As described above, according to the present invention, the small-diameter measuring tube is arranged so that the bottom surface of the small-diameter measuring tube comes into contact with the upper surface of the bottom wall of the large-diameter measuring tube in the state of being fitted to the large-diameter measuring tube. A long float is formed on the inner peripheral surface of the large-diameter measuring tube, and a first float for floating the water surface in the large-diameter measuring tube to display the water surface is displayed on the inner peripheral surface of the small-diameter measuring tube. A second float for floating the water surface in the small diameter measuring cylinder and displaying the water surface is fitted so as to be slidable up and down, and a circle that loosely penetrates the small diameter measuring cylinder in the center of the first float Since a hole is formed , even if the small diameter measuring tube is fitted in the large diameter measuring tube, or even if the water surface in the small diameter measuring tube is submerged below the water surface in the large diameter measuring tube, the large diameter measurement visibility of the reservoir water level of the tubular inner diameter measuring tube is greatly improved by the second float,且rainfall measurement by the diameter measuring tube easily It can be carried out accurately.

  In particular, according to the invention of claim 2, since the outside rainfall scale displays a normal rainfall amount in a non-fitted state of the small-diameter measuring tube, it becomes possible to use the large-diameter measuring tube alone. Since the small-diameter measuring cylinder does not appear through the large-diameter measuring cylinder, it is possible to easily measure the rainfall using the large-diameter measuring cylinder. In particular, when the small-diameter measuring tube is fitted in the large-diameter measuring tube, the rain gauge can accurately and accurately measure even in the case of light rain due to the inner rain scale with a relatively large scale interval. At this time, even if the vicinity of the water surface of the small diameter measuring tube is below the water surface in the large diameter measuring tube, the visibility of the water surface of the small diameter measuring tube is good due to the float. It is easy, and when the small diameter measuring tube is full and water overflows to the large diameter measuring tube side, all the water in the small diameter measuring tube is moved into the large diameter measuring tube and the small diameter measuring tube is emptied. By fitting (resetting) again into the large-diameter measuring tube in the state, it is possible to accurately measure the rainfall from that point with the small-diameter measuring tube.

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  In the accompanying drawings, the drawings show an embodiment of the present invention, and FIG. 1 shows a state in which a rain gauge is mounted on the horizontal outer end surface of the support wall so as to straddle the upper side (first mounting mode). FIG. 2 is a sectional view taken along arrow 2 in FIG. 1, FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2, FIG. 4 is a sectional view taken along line 4-4 in FIG. FIG. 6 is an enlarged plan view showing the holder portion, and FIG. 7 is a state in which the rain gauge is attached to the vertical outer end surface of the support wall so as to straddle the outer side (second attachment mode). FIG. 8 is a view taken in the direction of the arrow 8 in FIG. 7, and FIG. 9 is an enlarged sectional view taken along line 9-9 in FIG.

  The rain gauge U is attached to a support wall, for example, a wall body S, S ′ of a veranda via an attachment bar B. The mounting bar B has a holder portion 10 for holding the rain gauge U so as to be detachable, and is disposed horizontally. The base of the mounting bar B is detachably clamped to the wall S by the clamping means C. Thus, the rain gauge U is attached to the wall bodies S and S ′ in a cantilever manner via the attachment bar B.

  Below, the structure of the rain gauge U and the attachment structure of the rain gauge U to the wall bodies S and S ′ will be described sequentially.

The rain gauge U is made of a material such as transparent glass or plastic and has a bottomed cylindrical large-diameter measuring tube 1 that extends in the vertical direction. A small-diameter measuring tube 2 that is formed in a small-diameter bottomed cylindrical shape and is concentrically fitted to the upper end opening of the large-diameter measuring tube 1 , and a large-diameter measuring tube 1 that receives rainwater and is small in diameter. A rain receiving means I for guiding rainwater to the small diameter measuring tube 2 in the fitted state and to the large diameter measuring tube 1 in the non-fitted state, respectively. The small diameter measuring cylinder 2 is fitted to the large diameter measuring cylinder 1 (see FIG. 2) so that the bottom wall lower surface of the small diameter measuring cylinder 2 is in contact with the upper surface of the bottom wall of the large diameter measuring cylinder 1. It is formed long downward.

  In the illustrated example, the rain receiving means I includes a first inlet tube 1u that is integrally connected to the upper end portion of the large-diameter measuring tube 1 and has a smaller diameter than the large-diameter measuring tube body, and a small-diameter measuring tube. And a second inlet tube 2u that is integrally connected to the upper end of the tube 2 and has a larger diameter than the small-diameter measuring tube 2. The second inlet cylinder 2u includes a lower small-diameter cylindrical portion 2ua that is press-fitted and fitted to the inner periphery of the first inlet cylinder 1u, and an upper large-diameter adjacent to the upper side of the first inlet cylinder 1u. The cylindrical portion 2ub is formed in a stepped cylindrical shape integrated with the intermediate step portion 2um, and the intermediate step portion 2um engages with the upper end of the first inlet tube 1u. The upper end portion of the small diameter measuring tube 2 closes the open upper surface of the large diameter measuring tube 1 while the small diameter tube portion 2ua is press-fitted and fitted into the first inlet tube 1u, and the upper portion of the small diameter measuring tube 2 Rainwater does not enter.

  Instead of the rain receiving means I as shown in the drawing, a rain receiving means separate from the large and small diameter measuring cylinders 1 and 2, for example, a funnel-shaped member (not shown) is prepared, and the funnel-shaped member center is provided. The downward small-diameter tube portion is selectively inserted into the open upper end portions (first and second inlet tubes 1u, 2u) of the large and small-diameter measurement tubes 1 and 2, and the small-diameter measurement tube is formed by the funnel-shaped member. The rainwater may be guided to the small diameter measuring tube 2 in the fitted state to the large diameter measuring tube 1 and to the large diameter measuring tube 1 in the non-fitted state.

  An inner rain scale Li for reading the rainfall from the water surface in the small diameter measuring tube 2 is provided on the peripheral wall of the small diameter measuring tube 2, and the large diameter measuring tube 1 is provided on the peripheral wall of the large diameter measuring tube 1. The outer rainfall scale Lo for reading the rainfall amount from the water surface is provided respectively. The outer rainfall scale Lo is a normal one in the non-fitted state in which the small diameter measuring tube 2 is extracted from the large diameter measuring tube 1. The rainfall amount is set to be displayed, and therefore the large-diameter measuring tube 1 can be used alone.

  Furthermore, a communication hole 2 h is provided in the upper part of the peripheral wall of the small diameter measuring tube 2 to allow the stored water to overflow into the large diameter measuring tube 1 when the inside of the small diameter measuring tube 2 is full.

Also, in the large and small diameter measuring cylinders 1 and 2, first and second floats F1 and F2 for floating on the water surfaces in the measuring cylinders 1 and 2 and displaying the water surfaces are accommodated in a vertically movable manner. The visibility of the water surface in each measuring cylinder 1 and 2 is improved. That is, the first float F1 is fitted to the inner peripheral surface of the large diameter measuring tube 1 and the second float F2 is fitted to the inner peripheral surface of the small diameter measuring tube 2 so as to be slidable vertically.

The construction material of the float F1, F2, may be a specific gravity of the material floating at least water, in the illustrated example is formed of a foamed synthetic resin material, also in the first float F1, slack small-diameter measurement pipe 2 A circular hole is formed in the central portion so as to penetrate through.

  Next, the attachment structure of the rain gauge U by the attachment bar B with respect to the said wall bodies S and S 'is demonstrated.

  The mounting bar B has a holder portion 10 for the rain gauge U at the tip and a relatively long first straight portion 11 extending horizontally, and a base end of the first straight portion 11 via an intermediate bent portion 13. It is provided with a relatively short second straight portion 12 that is provided and extends horizontally, and is formed in a crank shape. In the illustrated example, it is made of a metal material that hardly rusts, for example, a stainless steel rod.

  Clamping means C for clamping the base portion of the mounting bar B, that is, the second straight portion 12 to the wall bodies S and S ′, are respectively fitted to the second straight portion 12 so as to be slidable and rotatable. The first sandwiching arm 21 near the intermediate bending portion 13 and the second sandwiching arm 22 on the opposite side, which can sandwich the wall bodies S, S ′, and the second straight portion 12 are screwed together. There is provided a wing nut N as a nut member that can apply a clamping force to the wall bodies S and S ′ to both the clamping arms 21 and 22 by pressing the arms 21 and 22 toward the intermediate bending portion 13 side.

  In the illustrated example, the first and second sandwiching arms 21 and 22 have the same structure in order to save costs, and only the structure of the first sandwiching arm 21 will be described below. That is, the first sandwiching arm 21 is formed by pressing a rust-resistant metal material, for example, a stainless steel plate, and is fitted into the second linear portion 12 so as to be slidable and rotatable. A portion 30 and an arm portion 31 that is integrally suspended from the lower portion of the cylindrical portion 30 and extends radially outward (downward).

  The first pinching arm 21 is engaged with the intermediate bending portion 13 when the first pinching arm 21 is crimped to the intermediate bending portion 13 by tightening the wing nut N, and the first pinching arm 21 is attached to the mounting bar B. The first engaged portion 301 fixed to the first relative rotation position and the intermediate bent portion 13 are engaged with the first sandwiching arm 21 with respect to the mounting bar B by the first relative rotation. A pair of second engaged portions 302 are provided that are fixed at a second relative rotation position displaced from the moving position by a predetermined angle (90 ° in the illustrated example) to the left and right.

  In the illustrated example, the first engaged portion 301 is a first notch-shaped recess that is formed on one end surface of the cylindrical portion 30 at intervals in the circumferential direction and engageable with the intermediate bent portion 13. The second engaged portions 302 and 302 are configured to be adjacent to both sides of the first engaged portion 301 in the circumferential direction of the tubular portion 30, and the first engaged portion 301 is Each pair is formed by a pair of notch-shaped concave portions adjacent to each other at positions shifted by 90 degrees from side to side.

  The arm portion 31 is integrally provided with a pressing portion 31a having a flat first contact surface f1 perpendicular to the second straight portion 12 and capable of contacting the vertical side surfaces of the walls S, S ′. In addition, the cylindrical portion 30 has a second contact surface f2 that is perpendicular to the first contact surface f1 and that can contact the horizontal outer end surface Sa or the vertical outer end surface Sa ′ of the wall bodies S and S ′. An anti-rotation portion 30a is provided integrally.

  Further, the holder 10 that is provided at the tip of the mounting bar B and holds the rain gauge U is formed on the outer peripheral surface of the rain gauge U (the upper end portion of the large-diameter measuring tube 1 in the illustrated example) as shown in FIG. A first arc portion 101 formed so as to fit the annular constriction portion 1g having an annular groove shape to hold the rain gauge U, and a leading end side of the first arc portion 101, that is, a free end side, is connected to the first arc portion 101g. The first arc portion 101 is shorter than the first arc portion 101 and can be fitted to the annular constriction portion 11g so as to hold the large-diameter measuring tube 1 (and hence the rain gauge U) in cooperation with the base end portion 101e of the first arc portion 101. The two arc portions 102 are formed in a substantially C shape. The central angle of the first arc portion 101 is 180 degrees so that the rain gauge U can be stably held by the first arc portion 101 and the rain gauge U can be easily attached to and detached from the first arc portion 101 without difficulty. A slightly larger angle is set.

  Next, the operation of the embodiment will be described. When attaching the rain gauge U to the wall bodies S and S ′, first, the first and second sandwiching arms 21 and 22 are arranged so that the wall bodies S and S ′ are sandwiched between them. By tightening the wing nut N, the wall bodies S and S ′ are firmly clamped between the first and second sandwiching arms 21 and 22 to fix the mounting bar B to the wall bodies S and S ′.

  By tightening the nut N, the first pinching arm 21 is pressed against the intermediate bent portion 13 side of the mounting bar B. At this time, as shown in FIGS. When the portion 301 is engaged with the intermediate bent portion 13, a first attachment mode is obtained in which the first sandwiching arm 21 is fixed to the attachment bar B at the first relative rotation position. The horizontal outer end surface Sa is attached to the wall S having the horizontal outer end surface Sa so as to straddle the horizontal outer end surface Sa from above.

  Further, as shown in FIGS. 7 to 9, if any second engaged portion 302 of the first pinching arm 21 is engaged with the intermediate bending portion 13, the first pinching arm 21 is attached to the mounting bar B. In contrast, the second mounting mode is obtained in which the mounting bar B extends over the wall S ′ having the vertical outer end surface Sa ′ over the vertical outer end surface Sa ′ from the outside. Installed in.

  When the mounting bar B is clamped by clamping the wall bodies S and S ′ between the both sandwiching arms 21 and 22 by tightening the wing nut N in this way, the first sandwiching arm 21 is placed in the first position with respect to the mounting bar B. Since the 1st attachment aspect fixed to a relative rotation position and the 2nd attachment aspect which fixes the said pinching arm 21 to a 2nd relative rotation position can be selected arbitrarily, according to the selection, the attachment bar B is changed. It is possible to accurately correspond to an attachment mode in which the horizontal outer end surface Sa of the wall body S is straddled from above and an attachment mode in which the vertical outer end surface Sa ′ of the wall body S ′ is straddled from the outside. As a result, it is not necessary to separately prepare a dedicated mounting structure according to these mounting modes, and even when the mounting position of the rain gauge is changed due to moving or the like, it can be easily handled at low cost. In addition, since the intermediate bent portion 13 of the mounting bar B having a crank shape is used as a rotation restricting means for the mounting bar B of the first sandwiching arm 21 and also serves as a part of the clamping means C, a further structure of the mounting structure is provided. Simplification is achieved.

  Further, the arm portion 30 of each of the sandwiching arms 21 and 22 is integrally provided with a pressing portion 31a having a first abutment surface f1 that is perpendicular to the second straight portion 12 and can abut on both side surfaces of the wall bodies S and S ′. The cylindrical portion 30 has a second contact surface f2 that is perpendicular to the first contact surface f1 and can contact the horizontal outer end surface Sa or the vertical outer end surface Sa ′ of the walls S, S ′. Since the anti-rotation portion 30a is integrated, when the wall body S is sandwiched between the both sandwiching arms 21 and 22, both the sandwiching arms 21 and 22 can be easily prevented from rotating against the wall body S by the anti-rotation portion 30a. The clamping operation can be performed more easily.

  By the way, the holder portion 10 that detachably holds the rain gauge U is formed so as to be able to hold the large-diameter measuring tube 1 by fitting into an annular constricted portion 1g formed on the upper outer peripheral surface of the large-diameter measuring tube 1. The first arc portion 101 can be fitted to the annular groove 1g so as to be able to hold the rain gauge U in cooperation with the base end portion 101e of the first arc portion 101, connected to the distal end side of the first arc portion 101. Since it is composed of the short second arc portion 102, the rain gauge U is mounted in the normal attachment state of the rain gauge U fitting and holding the annular constricted portion 1 g with the first arc portion 101 due to external force or the like. Even if the first arc portion 101 is displaced in the horizontal direction (that is, the open side of the holder portion 10 having a substantially C shape), the rain gauge U is temporarily held by the second arc portion 102 even in the event that the first arc portion 101 has come off. Therefore, it is effective for preventing the rain gauge U from falling off. Each of the arc portions 101 and 102 can be slightly elastically deformed radially outward (that is, in the expanding direction) as indicated by a chain line in FIG. 6, and the attachment / detachment operation of the rain gauge U can be easily performed by the elastic deformation. It can be easily done.

  Thus, since the rain gauge U is mounted in a cantilevered manner by being overhanging outward on the wall bodies S and S ′ of the building via a long mounting bar B, it can affect the building. Accordingly, rainwater can be collected accurately in the rain receiving means I of the rain gauge U.

  Further, in the rain gauge U, when the small-diameter measuring cylinder 2 is fitted in the large-diameter measuring cylinder 1 (that is, when both measuring cylinders 1 and 2 are used in combination), all rainwater taken in through the rain receiving means I has a small diameter. It is possible to accurately measure the strength of the rainfall with the inner rainfall scale Li accumulated in the measuring cylinder 2 and having a relatively large scale interval between the peripheral walls of the small diameter measuring cylinder 2. On the other hand, when the small-diameter measuring tube 2 is not fitted into the large-diameter measuring tube 1 (that is, when the large-diameter measuring tube 1 is used alone), all of the rainwater taken in via the rain receiving means I is taken into account. It is possible to measure the amount of rainfall from the beginning of falling down without trouble even when it rains with the outside rain scale Lo of the circumference wall of the large diameter measuring tube.

  And in the large and small diameter measuring cylinders 1 and 2, floats F1 and F2 which float on the water surfaces in the measuring cylinders 1 and 2 and display the water surfaces are accommodated so as to be movable up and down. The visibility is good. In particular, even when the small diameter measuring tube 2 is fitted in the large diameter measuring tube 1, the water surface in the small diameter measuring tube 2 is clearly shown by the float F2, and the visibility is high. There is no risk of damage. On the other hand, in the above single use state of the large diameter measuring tube 1, the small diameter measuring tube 2 is not fitted therein, and the small diameter measuring tube 2 is not seen through, and this is combined with the use effect of the float F1. It is easy to check the water level in the large-diameter measuring tube 1, and the rain measurement by the large-diameter measuring tube 1 can be accurately performed.

  In addition, when the inside of the small diameter measuring cylinder 2 becomes full in the fitted state, water overflows to the large diameter measuring cylinder 1 and accumulates in the large diameter measuring cylinder 1. In this case, the small diameter measuring cylinder 2 If all the water inside is transferred into the large-diameter measuring tube 1 and the small-diameter measuring tube 2 is emptied and then re-inserted (reset) into the large-diameter measuring tube 1, the rainfall measurement from the re-mounting point is performed. The small diameter measuring tube 2 can perform with high accuracy. In this case, even if the water surface of the small-diameter measuring tube 2 is submerged under the water surface in the large-diameter measuring tube 1, the visibility of the water surface of the small-diameter measuring tube 2 is excellent due to the inner float F2. The rainfall measurement by the cylinder 2 can be performed accurately.

  Thus, the outside rain scale Lo in the large-diameter measuring tube 1 displays a normal rainfall amount when the small-diameter measuring tube 2 is not fitted, so even if the small-diameter measuring tube 2 is temporarily used during the rain, the small-diameter By pulling out the measuring tube 2 from the large-diameter measuring tube 1 and transferring all the water in the measuring tube 1 to the large-diameter measuring tube 1, the large-diameter measuring tube 1 can easily measure the total rainfall from the beginning of getting down. Is possible.

  Further, in the illustrated example, when the small diameter measuring cylinder 2 is fitted into the large diameter measuring cylinder 1, the upper end of the small diameter measuring cylinder 2 is fitted to the upper end of the large diameter measuring cylinder 1, and Since the open upper surface can be closed, the upper end portion of the small diameter measuring tube 2 serves as both a fixing means for the large diameter measuring tube 1 and an open upper surface closing means for the large diameter measuring tube 1, thereby simplifying the structure. .

  As mentioned above, although the Example of this invention was described, this invention is not limited to these Examples, A various Example is possible within the scope of the present invention.

  Moreover, in the said Example, although the outer side rainfall scale Lo in the large diameter measurement pipe | tube 1 was set so that a regular rainfall might be displayed in the non-fitted state of the small diameter measurement pipe | tube 2, in this invention (especially Claim 1), it is set. As in the prior art, the normal rainfall amount may be displayed in the fitted state of the small diameter measuring cylinder 2.

The perspective view which shows the state (1st attachment aspect) which attached the rain gauge which concerns on one Example of this invention so that it might straddle the upper side with respect to the horizontal outer end surface of a support wall. 2 arrow view of FIG. 3-3 enlarged sectional view of FIG. Sectional view taken along line 4-4 in FIG. Exploded perspective view showing clamp means Enlarged plan view showing the holder The perspective view which shows the state (2nd attachment aspect) which attached the rain gauge so that it might straddle the outer side with respect to the perpendicular | vertical outer end surface of a support wall. Fig. 8 arrow view FIG. 9 is an enlarged cross-sectional view taken along line 9-9.

F1, F2, Float I, Rain receiving means Li, Inner rainfall scale Lo, Outer rainfall scale U, Rain gauge 1, Large diameter measuring tube 2, Small diameter Measuring tube 2h ... Communication hole

Claims (2)

A transparent large-diameter measuring tube (1) formed in a bottomed cylindrical shape extending in the vertical direction, and a large-diameter measuring tube (1) formed in a bottomed cylindrical shape having a smaller diameter than the large-diameter measuring tube (1). ) With a transparent small-diameter measuring tube (2) whose upper part is detachably fitted into the upper end opening, and a small-diameter in a state where the small-diameter measuring tube (2) is fitted to the large-diameter measuring tube (1) in response to rainwater. The measurement tube (2) is provided with rain receiving means (I) for guiding rainwater to the large-diameter measurement tube (1) in a non-fitted state, and the small-diameter measurement tube (2) is provided on the peripheral wall of the small-diameter measurement tube (2). 2) The inner rainfall scale (Li) for reading the rainfall from the water surface inside, and the peripheral wall of the large diameter measuring tube (1) read the rainfall from the water surface inside the large diameter measuring tube (1). An outer rainfall scale (Lo) is provided for each of the small-diameter measuring cylinders (2). ) In rain gauge communicating hole for overflow (2h) is provided in,
The small diameter measuring tube (2) is arranged so that the bottom wall lower surface of the small diameter measuring tube (2) is in contact with the upper surface of the bottom wall of the large diameter measuring tube (1) in the state of being fitted to the large diameter measuring tube (1). Formed long and downward,
A first float (F1) for floating the water surface in the large-diameter measuring tube (1) and displaying the water surface is also provided on the inner peripheral surface of the large-diameter measuring tube (1). ) And the second float (F2) for floating the water surface in the small-diameter measuring tube (2) and displaying the water surface are slidably fitted in the inner peripheral surface, respectively,
A rain gauge characterized in that a circular hole is formed in the central portion of the first float (F1) so as to loosely penetrate the small diameter measuring tube (2) .   The rain gauge according to claim 1, wherein the outer rainfall scale (Lo) is set to display a normal rainfall amount in the non-fitted state.

Images