JP2602078Y2 - Lock mechanism for rotating handle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for a rotary handle provided on a pressure reducing valve for adjusting a pressure on the downstream side of a pressure fluid flow path.

[0002]

2. Description of the Related Art A valve which adjusts pressure or the like by operating a rotary handle, such as a pressure reducing valve, needs to lock the rotary handle so that the pressure adjusted by vibration or the like does not fluctuate. There is. For this reason, the pressure reducing valve or the like is provided with a lock mechanism for the rotating handle.
Is an example.

In FIG. 5, an adjusting screw 2 for adjusting the pressure of a fluid is rotatably mounted on a casing 1 of the pressure reducing valve, and one end of the adjusting screw 2 protrudes from the casing 1. The projecting portion of the adjusting screw 2 has a cross section of 4 as shown in FIG.
Since the fitting hole of the rotary handle 3 into which the rotary handle 3 is fitted is also rectangular, the rotary handle 3 can be moved in the axial direction of the adjusting screw 2. It is not mounted. The casing 1 and the rotary handle 3 are formed with tooth rows 4 and 5 that can mesh with each other. When the tooth rows 4 and 5 mesh with each other, the rotation of the rotary handle 3 is prevented. The position where the tooth rows 4 and 5 mesh with each other is the lock position, and when the rotary handle 3 is moved upward in the axial direction of the adjusting screw 2, the meshing of the tooth rows 4 and 5 is released. This position is the adjustment position, and the rotation handle 3 can be rotated together with the adjustment screw 2. Adjustment screw 2
Is rotated, the spring retainer 6 moves in the axial direction of the adjusting screw 2 to change the spring force of the adjusting spring 7, and the secondary pressure can be set to a fluid pressure corresponding to the spring force.

After setting the secondary pressure, the rotating handle 3 must be returned to the locked position, and the teeth 4 and 5 must be engaged to prevent the rotating handle 3 from rotating. Therefore, a lock mechanism for holding the rotary handle 3 at the lock position is provided. The conventional locking mechanism includes a rotating handle 3
An elastic arm 8 having a ratchet claw 9 at its tip is formed by integral molding with the notch 10 formed on the housing 1 at the locked position and the adjusted position of the rotating handle 3.
It is configured to be locked to.

[0005]

However, in the lock mechanism of the conventional rotary handle 3 described above, the rotary handle 3 is a molded product of a synthetic resin. Therefore, the rotating handle 3
In order to make the latch force of the elastic arm 8 appropriate, the shape relating to the elastic coefficient of the elastic arm 8 during molding, the notch 10 and the ratchet pawl 9
It is necessary to make the shape of the device suitable for the latch force. However, since the elasticity of the synthetic resin fluctuates depending on molding conditions such as the magnitude of strain, temperature, and pressure, there is a problem that it is difficult to obtain an optimum resin unless the molding dimensions and molding conditions are corrected several times. .

Further, if the elastic arm 8 is made of a synthetic resin, the synthetic resin material may cause permanent distortion or the like due to creep or operation of the handle. When it was done, there was a problem that reliability was lacking.

In view of the above-mentioned conventional problems, the present invention can easily obtain the holding force required for locking the rotary handle over a long period of time, and can obtain a secure lock even when used in a place where there is vibration. It is an object of the present invention to provide a lock mechanism for a rotating handle.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an adjusting screw which is rotatably mounted on a housing of a valve, and adjusts a pressure or the like of a fluid by rotating the adjusting screw. A rotation handle for rotating a screw, the rotation handle being movable between an adjustment position and a lock position in the axial direction of the adjustment screw, and being rotatable when the rotation handle is in the adjustment position; In the lock mechanism of the rotating handle, in which the adjustment rotation is prevented when in the position, a metal elastic arm having a ratchet claw formed at one end is attached to the rotating handle, and when the rotating handle is in the adjusted position and the locked position, The ratchet pawl of the elastic arm is engaged with a notch formed in a housing of the valve.

Further, in order to achieve the above object, the present invention provides a rotary handle having a cylindrical skirt portion serving as a grip portion, wherein a mounting seat is formed inside the skirt portion, and The other end is provided with a clip portion which is fitted to the mounting seat and the elastic arm is mounted on the rotary handle.

Still further, in order to achieve the above object, the present invention provides a method for manufacturing a vehicle, comprising: a window in which the rotating handle is provided on a mounting seat, for pulling out the ratchet pawl of the elastic arm locked by the notch; The ratchet claw is formed and has a hook portion for pulling out the ratchet claw.

[0011]

According to the above construction, when the rotary handle is in the adjustment position and the lock position, the ratchet pawl locked by the notch is provided on the metal elastic arm of a separate member from the rotary handle.
The holding force required for locking the rotating handle can be easily obtained for a long period of time.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are views showing an embodiment of a lock mechanism of a rotary handle according to the present invention, wherein a left half of a center line is a front view and a right half is a cross-sectional view. 1 and 2, the same members as those of the conventional rotation handle lock mechanism shown in FIG. 5 are denoted by the same reference numerals.

In the lock mechanism of the present invention, a leaf spring 12 as a metal elastic arm is attached to a cylindrical skirt portion 11 serving as a grip portion of the rotary handle 3. Leaf spring 1
3, a ratchet claw 13 is formed at one end, and a clip portion 14 having a C-shaped cross section is formed at the other end, as shown in FIG. On the other hand, a mounting seat 16 to which a leaf spring 12 is mounted is formed on the skirt portion 11 of the rotating handle 3. As shown in FIG. 4, the mounting seat 16 is a beam-like portion that extends laterally to the lower side of the window 17 formed in the skirt portion 11 to be slightly larger than the vertical and horizontal widths of the leaf spring 12. The taper 16 has a taper that gradually narrows from the inside to the outside.

When attaching the leaf spring 12 to the rotating handle 3, the rotating handle 3 is removed from the adjusting screw 2 of the housing 1, and the clip portion 14 of the leaf spring 12 is fitted to the mounting seat 16 from inside the rotating handle 3. At this time, since the clip portion 14 has a C-shaped cross section and the mounting seat 16 is formed with a taper that gradually decreases from the inside to the outside, the leaf spring 12 once fitted easily falls off the mounting seat 16. Never. Further, after the leaf spring 12 is attached, when the rotating handle 3 is attached to the adjusting screw 2 of the housing 1, the leaf spring 12
Is sandwiched between the rotating handle 3 and the housing 1, so that the leaf spring 12
Cannot be removed to the outside.

A notch 10 is formed in the housing 1 to lock the ratchet claw 13 when the rotary handle 3 is in the lock position and the adjustment position. In this case, the ratchet claw 13 is bent inward so as to be lightly pressed against the notch 10 in a state of being dropped into the notch 10, so that no rattling occurs at any position when the rotating handle 3 is moved in the axial direction of the adjusting screw. . The notch 10 is 90 °
Since the rotated shape, that is, the shape of the upper and lower ends of the notch 10 in the drawing is formed at an acute angle, the ratchet claw 13 is completely latched at the acute angle, and the rotating handle 3 does not fall off.

In the locking mechanism for the rotating handle 3 having the above-mentioned structure, the leaf spring 12 as an elastic arm is a separate member from the rotating handle 3, so that the latching force of the rotating handle 3 can be easily adjusted appropriately. Since it is not a resin material, it does not cause creep or permanent deformation due to handle operation, and a good holding force can be obtained over time.

When the rotating handle 3 is removed from the adjusting screw 2, a screwdriver or the like is hooked on a round hole 15 as a hook portion formed near the center of the leaf spring 12 so that the ratchet claw 13 is detached from the notch 10. The leaf spring 12 is opened by pulling the leaf spring 12 outward. Leaf spring 1
By opening the rotation handle 2, the rotary handle 3 becomes free with respect to the housing 1 and can be removed from the adjustment screw 2.

[0018]

According to the first aspect of the present invention, since the elastic arm is made of metal and is a separate member from the rotating handle, the latching force of the rotating handle can be easily adjusted appropriately, and is not made of a synthetic resin material. Therefore, no creep or permanent distortion due to the operation of the handle is generated, and the holding force required for locking the rotary handle can be easily obtained for a long period of time.

According to the structure of the second aspect, the mounting seat is formed inside the skirt portion of the rotary handle, and the clip portion that can be fitted from the inside of the mounting seat is provided at the other end of the elastic arm.
The elastic arm is sandwiched between the rotating handle and the housing, and the rotating handle can be reliably prevented from coming off the adjustment screw.

According to the third aspect of the present invention, since the window for pulling out the ratchet pawl of the elastic arm locked to the notch and the hook for pulling out the ratchet pawl are provided, the rotating handle can be adjusted if necessary. Can be removed from the screw.

[Brief description of the drawings]

FIG. 1 shows an adjustment position of a lock mechanism of a rotary handle according to the present invention, in which a left half of a center line is a front view and a right half is a cross-sectional view.

FIG. 2 shows a lock position of a lock mechanism of the rotary handle, wherein a left half of a center line is a front view and a right half is a cross-sectional view.

FIGS. 3A, 3B, and 3C are a front view, a plan view, and a side view of a leaf spring.

FIG. 4 is a side view of the rotary handle.

FIG. 5 shows an adjustment position of a lock mechanism of a conventional rotary handle, wherein a left half of a center line is a front view and a right half is a cross-sectional view.

FIG. 6 is a cross-sectional view of a conventional rotation handle locking mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Adjusting screw 3 Rotating handle 4,5 Teeth row 12 Leaf spring 13 Ratchet claw 14 Clip part 15 Round hole 16 Mounting seat 17 Window

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Atsushi Tanaka 4-97, Ueda-Higashi-cho, Nishinomiya-shi, Hyogo Inside Konan Electric Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) F16K 31/44 -31/62 F16K 35/00-35/16

Claims (3)

(57) [Scope of request for utility model registration] 1. An adjusting screw, which is rotatably mounted on a housing of a valve and adjusts pressure or the like of a fluid by rotating, and a rotating handle for rotating the adjusting screw, wherein the rotating handle is In the lock mechanism of the rotary handle, the adjustable screw is movable between an adjustment position and a lock position in the axial direction of the adjustment screw, and is rotatable when the rotary handle is in the adjustment position, and is prevented from being adjusted and rotated when in the lock position. A metal elastic arm having a ratchet claw formed at one end is attached to the rotating handle, and when the rotating handle is at the adjustment position and the lock position, a ratchet claw of the elastic arm is formed on a housing of the valve. A locking mechanism for the rotating handle, which is locked by a notch. 2. The locking mechanism for a rotary handle according to claim 1, wherein the rotary handle includes a cylindrical skirt portion serving as a grip portion, and a mounting seat is formed inside the skirt portion, and the elasticity is provided. The other end of the arm is provided with a clip portion that can be fitted from inside the mounting seat, the lock mechanism for a rotating handle. 3. The locking mechanism for a rotary handle according to claim 1, wherein the rotary handle is provided on a mounting seat, and a window for pulling out the ratchet pawl of the elastic arm locked in the notch. A lock mechanism for a rotary handle, comprising: an elastic arm; and a hook for pulling out the ratchet pawl.