JPH08296847A - Assembling method for operating apparatus - Google Patents

Abstract

PURPOSE: To simplify the assembling operation and to shorten the assembling time by so mounting a coiled spring in the groove of a cam that the arm of the spring is filled in an arm locking unit, and engaging a shaft with the shaft hole of a cam from a groove peripheral direction. CONSTITUTION: A coiled spring 4 is so dropped in the groove 32 of a cam 3 that the arm 41 of the spring 4 is filled in an arm locking unit 321. The directions are matched, and a shaft 5 is dropped in the shaft hole 31 of the cam 3 to be engaged. This assembly is covered with a shaft guide 2, the shaft 5 is passed through a circular hole 21, and a hook 42 is engaged with the engaging part 24 of the guide 2. The guide 2 is half-rotated in a spring winding direction. The rear part 51 of the shaft 5 is inserted into a circular hole 11, and tongue pieces 22, 23 are engaged with tightening parts 12, 13. The parts 12, 13 are tightened. Thus, since the assembling operation is simple, the erroneous assembling can be prevented, and skill is not required. Therefore, no labor hour is taken for the quality inspection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling an operating device for rotating a shaft for operation.

[0002]

2. Description of the Related Art For example, as a cock mechanism for a gas cock, a rotary cock mechanism K shown below has been conventionally used (see FIG. 4). Cock mechanism K has a circular hole 90
1, a caulking portion 902, screw holes 903 and 904 for mounting micro switches, and a base plate 906 formed with a communication hole 905 for screwing to the valve body, and a base plate 906.
A shaft guide 909 having a tongue piece 907 that fits into the caulking portion and a circular hole 908 and that has a substantially U-shaped cross section;
The rear portion 910 inserted into the circular hole 901, the intermediate portion 912 in which the groove 911 is formed, and the chamfer 913 form the step portion 91.
4 has a substantially cylindrical shaft 9 having a front part 915.
16, an E ring 917 fitted in the groove 911, and an E ring
The washer 918 attached to the ring 917 and the U-shaped hook 9
19 is hooked on the base plate 906 and the U short hook 920 is hooked on the spring hooking hole 921, the shaft return spring 922, the shaft hole 923, and the spring hooking hole 92.
1, a switch tongue 924 for pressing and driving the micro switch for ignition, and a fan portion 925 for pressing and driving the micro switch for power supply, and a switch cam plate 926 that is inserted and attached to the step 914. , A cylindrical spacer 927 fitted in front of the switch cam plate 926 is assembled.

Incidentally, in the rotary cock mechanism, the shaft is greatly wobbled at the "stop" position and the pinch stop position becomes unstable. Therefore, in order to avoid this, generally,
A shaft return spring is used to fix the shaft at the pinch stop position.

The cock mechanism K is assembled in the following assembling procedure (see FIG. 4). (1) Fit the E-ring 917 on the shaft 916, and wash the washer 9
18 and the shaft return spring 922 are fitted. (2) With the U short hook 920 hooked in the spring hooking hole 921, the shaft hole 92 of the switch cam plate 926.
Pass shaft 916 through 3. (3) Rear part 910 of the shaft 916 assembled with these
Is inserted into the circular hole 901 of the base plate 906.

(4) The shaft return spring 922 is rotated by 1.5 rotations (counterclockwise rotation) to hook the U-shaped hook 919 on the base plate 906. (5) The spacer 927 is passed through the shaft 916, and the front portion 915 of the shaft 916 is inserted into the circular hole 908 of the shaft guide 909. (6) The crimp portion 902 is crimped in the arrow direction.

[0006]

The above-mentioned conventional techniques have the following problems. (A) Base plate 906, shaft guide 909, shaft 916, E ring 917, washer 918, spring 9
22, parts such as the switch cam plate 926 and the spacer 927 are required, and the number of parts is large. (Ii) Since the assembly is complicated, it takes a long time to assemble.

(U) In the step (4), a large force is required to rotate the shaft return spring 922, and if a shock is applied after the rotation, the shaft return spring 922 will return. (E) The washer 918 and the shaft return spring 922 are easily installed in the wrong place, such as a wrong place, and the quality inspection takes time. An object of the present invention is to provide a method of assembling an operating device, which has an excellent assembling property. In addition, automatic assembly can be done by rotating the hand chuck for automatic assembly.
It is to be able to automate by just assembling the parts from above and rotating hand and caulking on both sides.

[0008]

In order to solve the above problems, the present invention employs the following configurations. [1] A base plate having a circular hole, a shaft guide having a large-diameter circular hole having a substantially U-shaped cross section, and a cam having a shaft hole having a groove having an arm engaging portion provided around the cam. A coil spring having an arm formed at one end and a hook formed at the other end, a rear part that can be inserted into the circular hole, a large-diameter intermediate part that can be inserted into the shaft hole, and a front part from the large-diameter circular hole. A substantially columnar shaft having a projectable front portion, the coil spring is fitted into the groove so that the arm enters the arm locking portion, and the shaft is rearward from the groove circumferential direction. Fit in the shaft hole, pass the shaft front part through the large diameter circular hole, hook the hook on the shaft guide, rotate the shaft guide in the spring winding direction, fix the shaft guide to the base plate and assemble It is.

[2] In the operating device having the above-mentioned configuration (1), the convex portion for pressing and driving the micro switch for ignition and power supply is formed on the outer periphery of the cam.

[0010]

[Action]

[Claim 1] The operating device is assembled as follows. Install the coil spring in the groove of the cam so that the arm of the coil spring enters the arm locking part. Insert the shaft into the shaft hole of the cam from the groove circumferential direction. As a result, the intermediate portion is fitted into the shaft hole. Pass the shaft of this assembly through the large diameter circular hole of the shaft guide,
Hook the hook on the shaft guide. With the shaft fixed, turn the shaft guide in the spring winding direction.
Insert the rear part of the shaft into the circular hole and fix the shaft guide to the base plate.

[Claim 2] When the shaft is rotated by a predetermined angle, the micro switch for ignition and power supply is pressed by the convex portion formed on the outer circumference of the cam.

[0012]

【The invention's effect】

[Claim 1] Since the shaft guide is rotated in the spring winding direction, the assembly can be performed only by the rotation stroke of the hand chuck of the automatic machine. Since the assembly work is easy, incorrect assembly can be prevented. Therefore, quality inspection does not take time. Even when assembled by hand, a small rotating force is sufficient, so even a woman can work sufficiently. Since the assembly work is easy, the assembly time can be shortened. As a result, work efficiency is improved and cost can be reduced.

[Claim 2] Since the convex portion formed on the outer circumference of the cam presses and drives the microswitch for ignition and power supply, and also has the function of the switch cam plate, the switch cam plate is not necessary. Therefore, the E-ring, the washer, the switch cam plate, and the spacer are not necessary, and the operating device can be manufactured with a small number of parts (base plate, shaft guide, cam, coil spring, shaft). As a result, the cost of parts can be further reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the cock mechanism M includes a base plate 1 having a circular hole 11, a shaft guide 2 having a circular hole 21, a cam 3 having a shaft hole 31 and a groove 32, and an arm. The coil spring 4 having the ends 41 and the hooks 42 and the shaft 5 having the rear portion 51, the intermediate portion 52, and the front portion 53 are assembled. Then, on the back surface of the base plate 1 of the cock mechanism M, a main valve, a pilot valve, a safety valve, and a valve body (not shown) incorporating a rod mechanism are mounted.

The base plate 1 (thickness: about 1.5 mm) is manufactured by punching out a metal plate and has a circular hole 11 (diameter 7 mm).
, The caulking portions 12 and 13, and the micro switches SW1 and S
Screw holes 111 and 112 for mounting W2, fan-shaped slits 113 and 113, and communication holes 14 and 14 for screwing the valve body to the back side are formed (see FIG. 2).

The shaft guide (made of metal) 2 has tongue pieces 22, 23 fitted into the caulking portions 12, 13 provided on the base plate 1.
And a circular hole 21 (diameter 8 mm) and has a substantially U-shaped cross section.

The cam 3 (made of plastic) has a shaft 5
The shaft hole 31 into which the intermediate portion 52 is inserted is formed at the center. Further, the arm 4 is provided on the outer periphery of the shaft hole 31.
A cylindrical groove 32 having an arm locking portion 321 into which 1 is inserted is provided. Further, on the outer circumference of the cam 3, convex portions 33 and 34 for pressing and driving the micro switch SW1 for ignition and the micro switch SW2 for power supply are formed.

The coil spring 4 is an arm 4 that bends outward.
1 at one end (lower side in the figure) and U at the other side (upper side in the figure)
A character-shaped hook 42 is formed. This coil spring 4
The arm 41 is positioned in the arm locking portion 321 and mounted in the groove 32 (excluding the hook 42).

In the shaft 5, in this embodiment, an iron rod is subjected to cold forging to integrally form a rear portion 51, an intermediate portion 52 and a front portion 53 (see FIG. 1). Rear part 5 of shaft 5
1 has a cylindrical shape with a diameter of about 6 mm and a length of about 11 mm, and a notch having a length of 7 mm and a width of 2 mm is formed in the front direction from the rear end. To do.

Intermediate portion 52 (diameter 8 mm, length 16 mm)
Has a columnar shape, and a circular flange 521 (thickness: 1.5 mm, diameter: 11 mm) is formed rearward by 5.2 mm from the tip, and a rectangular protrusion (width 2. 5 mm) is formed on the front end face side of the flange 521.
5 mm and a height of 2 mm) 522 are formed at opposing positions.

The outer peripheral surface of the intermediate portion 52 is chamfered (width: 5 m).
m, length 10 mm). The boundary between the middle portion 52 and the rear portion 51 is a step 523 due to the difference in diameter. The front part 53 has a cylindrical shape with a diameter of 6.8 mm and a length of 14 mm, and the tip is processed into a taper shape, and after assembly,
A knob (not shown) for rotating the shaft 5 is attached to the front portion 53.

Next, the assembly of the cock mechanism M is shown in FIG.
~ It demonstrates based on FIG. {1} As shown in FIG. 1, the arm 41 of the coil spring 4 is
The coil spring 4 is dropped into the groove 32 of the cam 3 so that the coil spring 4 enters the arm locking portion 321. {2} As shown in FIG. 1, by aligning the directions, the shaft 5 is dropped and fitted into the shaft hole 31 of the cam 3.

{3} As shown in FIG. 1, the assembly is covered with the shaft guide 2, the shaft 5 is passed through the circular hole 21, and the hook 42 is hooked on the hooking portion 24 of the shaft guide 2.

{4} As shown in FIG. 2, the shaft guide 2 is rotated half a turn in the arrow direction (spring winding direction). {5} As shown in FIG. 2, the rear portion 51 of the shaft 5 is inserted into the circular hole 11 and the tongues 22 and 23 are attached to the crimp portions 12 and 1.
Fit in 3. {6} As shown in FIG. 3, the crimp portions 12 and 13 are crimped in the arrow direction.

Next, the advantages of this embodiment will be described. [A] Since the assembling work is simple, erroneous assembling can be prevented and no skill is required. For this reason, it does not take time for quality inspection and work instruction.

[A] Easy to assemble, and when the coil spring 4 is rotated in the spring winding direction {Fig. 2}
It does not require a lot of power. Therefore, the assembling time can be shortened, and the worker is not tired, so that the working efficiency is improved.

[C] Winding the coil spring 4,
Since this is a work method of assembling the shaft guide 2 to the base 1, the spring plates 11 of the microswitches SW1 and SW2 are used.
It is possible to prevent the damage of Nos. 4 and 115.

[Brief description of drawings]

FIG. 1 is an assembly diagram of a cock mechanism according to the present invention.

FIG. 2 is an assembly diagram of a cock mechanism according to the present invention.

FIG. 3 is an assembly diagram of a cock mechanism according to the present invention.

FIG. 4 is an assembly diagram of a cock mechanism according to a conventional technique.

[Explanation of symbols]

 1 base plate 2 shaft guide 3 cam 4 coil spring 5 shaft 11 circular hole 21 circular hole (large diameter circular hole) 31 shaft hole 32 groove 33 convex portion 34 convex portion 41 arm 42 hook 51 rear portion 52 intermediate portion 53 front portion 321 arm engagement Stop part SW1 Micro switch for ignition SW2 Micro switch for power supply M Cock mechanism (operating device)

Claims (2)

[Claims] 1. A base plate having a circular hole, a shaft guide having a large-diameter circular hole having a substantially U-shaped cross section, and a cam having a shaft hole provided with a groove having an arm engaging portion. A coil spring having an arm formed at one end and a hook formed at the other end, a rear part that can be inserted into the circular hole, a large-diameter intermediate part that can be inserted into the shaft hole, and the large-diameter circular hole. A substantially columnar shaft consisting of a front part that can project forward, the coil spring fitted into the groove so that the arm enters the arm locking part, and the shaft is located on the rear side from the groove circumferential direction. Insert into the shaft hole, pass the shaft front part through the large diameter circular hole, hook the hook on the shaft guide, rotate the shaft guide in the spring winding direction, fix the shaft guide to the base plate. How to assemble the operating device. 2. The operating device according to claim 1, wherein a convex portion for pressing and driving a micro switch for ignition or power supply is formed on the outer periphery of the cam.