JPH0216089Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a spring device for automatically lowering a wick and a clutch ratchet wheel for switching up and down in a wick lifting device for a liquid fuel combustor such as an oil stove.

<Prior art> In the past, the spring device for automatic core lowering and the clutch ratchet wheel for lifting/lowering switching were not integrated into a unit, and the core lifting/lowering operating shaft was fixed through the spring device and ratchet wheel. It was a structure that was interconnected for the first time. That is, as shown in FIG. 1, the spring device A includes a cylindrical spring case 1 having a center hole 1a and a lid 1b formed at the front end, a rotating body 2 located inside the spring case 1, and a rear body of the rotating body 2. A cylindrical core lowering spring 3 is installed between the circular outer circumferential surface of the spring case 2a and the circular inner circumferential surface of the spring case 1 and has its front and rear ends fixed respectively, and a large diameter hole 4 is fixed to the rear surface of the spring case 1 by caulking.
It consists of a spring stopper plate 4 with a, and a spring case 1.
A ratchet wheel 5 with a center hole 5a is disposed on the front surface of the ratchet wheel 5, and an engaging ring 6 having a concave cross section is formed on the front surface of the ratchet wheel 5.
Furthermore, a retaining piece 7 consisting of a semicircular plate 7b with a tongue piece 7a, a horizontal plate 7c, and an opening 7d at the mutual connection part is disposed, and in the assembly process, the center hole 2b of the rotating body 2, the spring case 1
The core lifting/lowering operation shaft 8 is passed through the center hole 1a of the core lifting/lowering operating shaft 8 and the center hole 5a of the ratchet wheel 5.
is engaged with the groove 2c of the rotating body 2, and the core lifting/lowering operation shaft 8
The front end split groove 8a is externally fitted onto the horizontal plate 7c through the opening 7d, both of which are fixed with a stop pin 9b, and the semicircular plate 7b is fitted into the engagement ring 6 and press-fitted into the engagement ring 6. By engaging the C-shaped bullet 10 with the tongue piece 7a, the core lifting/lowering operation shaft 8, ratchet wheel 5, and stopper piece 7 are fixed, and the knob is press-fitted into the horizontal plate 7c of the stopper piece 7.

However, since the spring device A for automatically lowering the core and the clutch ratchet wheel 5 for lifting/lowering switching are not integrated into a unit, assembly workability is poor, and moreover, the horizontal plate 7
Due to errors in the straightness of the grooves 8c and 8c, the center of the ratchet wheel 5 is misaligned with respect to the center of the core lifting/lowering operation shaft 8, resulting in a drawback that these do not rotate smoothly.

<Purpose> The present invention was devised in view of the above-mentioned drawbacks of the prior art, and provides a wick lifting device for a liquid fuel combustor that can be assembled into a unit in advance by a spring device for automatically lowering the wick and a clutch ratchet wheel for lifting/lowering switching, and is easy to assemble. The purpose is to provide

<Embodiment> Hereinafter, an embodiment of the present invention will be described based on the drawings.
The spring device C has a circular inner peripheral surface 1 at the front end.
A rotating body 12 consisting of a cylindrical spring case 11 in which an inward flange 11b with an attached flange 1a is formed, a rear body 12a located inside the spring case 11, a front body 12b located outside and in front of the spring case 11, and the rear body 1.
A cylindrical core-descending spring 13 internally connected between the circular outer circumferential surface of 2a and the circular inner circumferential surface of the spring case 11.
A protruding ring 12c is formed at the front end of the rear body 12a and rotatably abuts on the rear surface of the inward flange 11b, and a circular outer circumferential surface 12d at the rear end of the front body 12b is formed within the circular inner surface of the inward flange 11b. A rear surface d1 of a ratchet wheel D rotatably fitted to the circumferential surface 11a and fitted and fixed to the outer circumferential surface 12d of the front body 12b.
is rotatably abutted on the front surface 11d of the inward flange 11b, and a core lifting/lowering operation shaft 14 is fixed through the center hole 12e of the rotating body 12, and the spring case 1
1 is fixed to the board F of the fire extinguishing system.

In this example, an outward flange 11e is formed at the rear end of the spring case 11, and a spring stopper plate 15 is fixed to the rear end by caulking. An engagement groove 12f is formed in the front body 12b of the rotating body 12, and a pin groove 12g is formed in the rear body 12a, and a stop pin 16 of the shaft 14 is engaged with the pin groove 12g. The large diameter center hole d2 of the ratchet wheel D is located in the front body 1.
2b, and an engaging piece 17 is fixed to the front surface of the ratchet wheel D to form an engaging ring 18. The rotating body 12 and ratchet wheel D are fixed by the end portion being engaged with the engagement groove 12f. Further, a flat portion 14a is formed at the front end of the core elevating/lowering operating shaft 14, into which a knob 20 is press-fitted and fixed, and a pinion 14b is fixed to the rear end of the core elevating/lowering operating shaft 14. In addition, 2
2 is a support tube for the core lifting/lowering operation shaft 14, 23 is a cap nut screwed onto the tube, and 24 is a packing.

Next, the assembly procedure will be explained. In the unit E, a rotating body 12 with a center lowering spring 13 is inserted into a spring case 11 from the rear, and a spring stopper plate 15 is attached to the spring case 1.
1, and the ratchet wheel D is attached to the front body 12b of the rotating body 12.
These are assembled in advance by being fitted into and fixed with bullets 19. And the core lifting/lowering operation shaft 14 is supported by the support tube 22 etc. on the board F.
Insert the unit E from the front into the rotating body 12.
The center hole 12e of the center hole 12e is fitted onto the core lifting/lowering operation shaft 14, the retaining pin 16 and the groove 12g are engaged, the spring retaining plate 15 is engaged and fixed to the board F, and the flat part 19a of the front end of the core raising/lowering operating shaft 14 is fitted. The knob 20 is press-fitted and fixed. Incidentally, the ratchet wheel D is engaged with a fire extinguishing rocking pawl (not shown) that allows the ratchet wheel D to rotate only in the forward direction.

Next, to explain the action, turn the knob 2 to raise the core.
0 in the positive direction, the core lifting/lowering operation shaft 14 rotates, and the pinion 14b at the rear end moves up the rack rod to raise the core. At this time, the ratchet wheel D rotates integrally with the core lifting/lowering operation shaft 14 while rocking the swinging pawl, so the rotating body 12 also rotates, and the core lowering spring 13 is elastically deformed by an amount commensurate with the rotated angle. elastic energy is stored.

In addition, when extinguishing a fire, the swing claw is forcibly moved upward by a known fire extinguishing mechanism, so the ratchet wheel D and the rotating body 1
2. The core lifting/lowering operation shaft 14 and the knob 20 are the core lowering springs 1
Due to the elastic recovery of step 3, the fire immediately rotates in the opposite direction, and at the same time, the pinion 14b, rack rod, and core descend to extinguish the fire.

<Effects> As is clear from the above explanation, the present invention includes a unit consisting of a spring device for automatically lowering the core and a clutch ratchet for switching up and down, and the spring device has an inward flange with a circular inner peripheral surface at the front end. a rotating body comprising a cylindrical spring case, a rear body located inside the spring case and a front body located at the front outside the spring case; a spring stop plate with a large diameter hole fixed to the rear surface of the spring case; A cylindrical core lowering spring is installed between the outer circumferential surface of the rear body and the inner circumferential surface of the spring case, and has one end connected to a spring stop plate and the other end connected to a rotating body. is formed with a protruding ring that rotatably abuts on the rear surface of the inward flange of the spring case, and the circular outer circumferential surface of the rear end of the front body is rotatably fitted into the circular inner circumferential surface of the inward flange. A ratchet wheel is fitted to the outer peripheral surface of the rotary body, the rear surface of the ratchet wheel is rotatably abutted to the front surface of the inward flange, the ratchet wheel is engaged and fixed to the front body of the rotary body, and the ratchet wheel is engaged with and fixed to the front body of the rotary body, and A core lifting/lowering operation shaft is fixed through the hole, and the spring case is fixed to a base plate of the fire extinguishing system.

Therefore, according to the present invention, the spring device for automatically lowering the core and the clutch ratchet wheel for lifting/lowering switching can be made into a unit in advance, which has the excellent effect of improving assembly workability.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a conventional device, FIG. 2 is an exploded perspective view of an embodiment of the present invention, FIG. 3 is an assembled perspective view of the same unit, and FIG. 4 is an assembled sectional view of the same. C: Spring device, D: Ratchet wheel, E: Unit, d
1: Rear surface of ratchet wheel, F: Board, 11: Spring case,
11a: circular inner peripheral surface, 11b: inward flange, 1
1c: Rear surface of inward flange 11b, 12: Rotating body, 12a: Rear body located in spring case, 12
b: Front body located outside the spring case, 12c: Projected ring, 12d: Circular outer peripheral surface, 12e: Center hole, 1
3: Core descending spring.

Claims (1)

[Scope of utility model registration request] The unit E includes a spring device C for automatically lowering the core and a clutch ratchet wheel D for switching up and down. , a rotating body 12 consisting of a rear body 12a located inside the spring case 11 and a front body 12b located at the front outside the spring case 11; a spring stop plate 15 with a large diameter hole 15a fixed to the rear surface of the spring case 11; It is comprised of a cylindrical core-dropping spring 13 which is internally disposed between the outer peripheral surface of the rear body 12a and the inner peripheral surface of the spring case 11, and has one end connected to the spring stop plate 4 and the other end connected to the rotary body 12. A protruding ring 12c is formed at the front end of the rear body 12a and rotatably abuts on the rear surface of the inward flange 11b of the spring case 11.
The circular outer peripheral surface 12d at the rear end of the inward flange 1
rotatably fitted into the circular inner circumferential surface 11a of 1b,
A ratchet wheel D is fitted on the outer circumferential surface 12d of the front body 12b, a rear surface d1 of the ratchet wheel D is rotatably abutted on the front surface 11d of the inward flange 11b, and the ratchet wheel D is fitted on the front surface of the rotating body 12. A wick elevating device for a liquid fuel combustor, which is engaged and fixed to a shell 12b, a wick elevating operation shaft 14 is fixed through a central hole 12e of the rotating body 12, and the spring case 11 is fixed to a substrate F of a fire extinguishing device. .