JPH027347Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a water flow rate regulating device used in water heaters, etc.

(B) Prior Art Small gas instantaneous water heaters and the like are equipped with a faucet called a hot water temperature control valve that restricts the amount of water supplied within a certain range without changing the combustion amount of the gas burner that serves as the heat source. On the other hand, this faucet is provided with a pin protruding in the radial direction of the operating shaft that adjusts the valve, as in, for example, Japanese Utility Model Application Publication No. 57-68962 (F16K5/10), and the pin engages with this pin to rotate the operating shaft. A holding plate is provided to restrict the range. For example, when finely adjusting the maximum water flow rate or the minimum water flow rate, it is often done by moving the presser plate, but in this case, the rotation range angle of the operating shaft shifts depending on the adjustment of the presser plate, so the operating shaft is moved. If a combination of a scale display and an index that displays the hot water temperature setting as a guide is provided around the rotary knob and the knob on the exterior case of a hot water heater, etc., due to the deviation in the rotation range angle, For example, there were cases where the scale display and the index did not match when the water temperature was set to the lowest temperature.

(c) Purpose of the invention The purpose of the invention is to prevent misalignment between the operating lever that rotates the valve and the scale display attached around it to facilitate confirmation of its rotational position.

(d) Structure of the invention The structure of the invention is that a pin is provided protruding in the radial direction of the rotating shaft of the valve that narrows the water passage by rotation, and a stopper is provided opposite the predetermined rotational position of this pin. The rotation range of the rotating shaft is restricted by contact with the pin, and a lever base for rotating the rotating shaft is fixed to the rotating shaft, and the operating lever with a knob attached to one end is attached to the lever base at the other end. One end of the operating lever is connected to the operating lever so that it can be adjusted in the rotating direction, and one end of the operating lever is inserted through a through hole drilled in the front cover of the instrument body, and furthermore, it is located around the through hole on the front surface of the front cover, and the knob is positioned so that it can be adjusted as described above. It is equipped with a display member such as a scale to visually check the opening degree of the valve, and the rotation range of the valve can be finely adjusted without changing the rotation angle of the operating lever.

(e) Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. 1 is a water valve body of a gas water heater, which has a water passage 2 connected to a heat exchanger (not shown); A valve 3 is installed in the middle of the water passageway, and the valve 3 is rotatably operated to throttle the amount of flow substantially in proportion to the rotation angle, and a rotary shaft 4 is integrally provided in the axial direction of one end of this valve.

Further, a lever base 5 made of a metal plate is connected to the tip of the rotating shaft 4 so as to rotate integrally at one end thereof, and a pin 6 for regulating rotation is provided on the circumferential surface of the rotating shaft 4 near the tip in the radial direction. is installed protrudingly.

Reference numeral 7 designates an operating lever which is overlapped with the lever base 5 and whose one end 7' is connected to the rotating shaft 4 with a screw 8 and loosely fitted, and has an elongated hole 9 extending in the width direction near the one end 7'. The adjustment screw 10 is screwed into the lever base 5 through this, and the other end 7'' is provided through a through hole 12 formed in the front cover 11 of the body so as to protrude forward from the front cover 11. Knob 13 is fixed to the.

Numeral 14 is a stopper fixed with a screw 15 facing a predetermined rotation stop position of the pin 6, and is used to set and adjust the minimum or maximum throttle position of the valve 3 within the range of the elongated hole 16.

17 is a through hole 12 in the front surface 11' of the front cover 11.
It is configured such that the amount of throttling of the valve 3 can be easily visually checked in correspondence with the knob 13 using a display member such as a scale attached by printing or the like around the valve.

The minimum or maximum throttle amount of the valve 3 is set by the contact between the pin 6 and the stopper 14, and when adjusting this, loosen the screw 15 and set the stopper 14.
This is done by shifting the operating lever 7.
That is, since the rotation range of the knob 13 also deviates, this is adjusted by loosening the adjustment screw 10.

(f) Effects of the invention With the configuration of the invention, it is possible to easily finely adjust the attachment angle of the lever base of the operating lever with respect to the rotational direction of the rotating shaft, and to visually check the rotational position of the operating lever. By reliably preventing misalignment between the display member provided on the front surface of the front cover and the knob for operating the operating lever, it is possible to more accurately display the throttle amount of the valve.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the present invention, and FIG. 2 is a partially broken side longitudinal sectional view. 2... Water passage, 3... Valve, 4... Rotating shaft, 5...
...Lever base, 6...Pin, 7...Operation lever, 13...Knob.

Claims (1)

[Scope of utility model registration request] A pin is provided protruding in the radial direction of the rotating shaft of the valve that narrows the water passage through rotation, and a stopper is provided opposite the predetermined rotational position of this pin, and the contact between this stopper and the pin causes the rotation of the rotating shaft. A lever base that regulates the range and rotates the rotating shaft is fixed to the rotating shaft, and the operating lever with a knob attached to one end is connected to the lever base at the other end so as to be adjustable in the direction of rotation of the rotating shaft. death,
In addition, one end of the operating lever is inserted through a hole in the front cover of the device body, and the lever is positioned around the hole in the front surface of the front cover to visually check the opening degree of the valve based on the position of the knob. A water flow control device equipped with a display member such as a scale.