JPH0350826Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application: The present invention relates to an improvement of a filter fixing device in a siphon-type coffee brewer.

Background of the invention: There are various ways to make coffee.
Among these, the saifon type is commonly used for commercial purposes such as coffee shops. As is well known, this siphon-type coffee boiler is made by placing a funnel (blue top) on top of the Bethu cell, inserting the pipe into the mouth of the Bethel, and then pouring the required amount onto the filter attached to the bottom of the funnel. Finely ground coffee is placed on top of the water, which is heated in the vessel using a burner from the outside bottom. Hot water flows into the funnel, extracts the ingredients from the ground coffee, and when the burner is turned off and the pressure inside the vessel is lowered, the extract that collects in the funnel is passed through a filter and dripped into the vessel. I'm going.

As a preparatory work for such an extraction operation, a filter is attached to the bottom of the funnel, and the means for fixing the filter is a circular stainless steel plate with a large number of through holes, as shown in Figure 5. 21
The top is covered with a filter 28 made of cloth such as flannel, and a locking rod 23 made of stainless steel wire with a hook 24 for locking and fixing is attached to the center of the bottom surface of the funnel through a tension spring 22. The hook 24 is engaged with the lower end of the tube 2'' by tensioning the tension spring 22 so that the circumference of the disk 21 evenly contacts the inclined surface 2' of the tube 2. Relatively long tension chains 26 on the sides
is installed.

The chain strips 26 in the filter fixing means having such a structure hang down and come into contact with the inner bottom of the vessel 1, as shown in FIG. 5, during coffee extraction. Then, while coffee is being extracted in the above-mentioned state, during the extraction time, which usually lasts 1 to 2 minutes, when hot water rises from Bethel 1 into funnel 2 and mixes with the ground coffee, A bumping phenomenon in which boiling water suddenly shoots up and overflows from inside the funnel to the surrounding area often occurs, which is not only dangerous but also problematic, as the liquid being extracted spills out, resulting in insufficient volume. Therefore, although various measures have been taken to eliminate this bumping phenomenon,
In order to obtain delicious coffee, sufficient extraction time is required, and the extraction operation must be carried out to a state where bumping phenomenon easily occurs, so there are many difficulties in solving this problem.

Therefore, the present inventor conducted various studies on the causes of this phenomenon, and found that the cause was that the tension chain for attaching the filter came into contact with the inner bottom of the vessel, and this caused the water inside the vessel to rise. With the amount reduced to the point where the siphon does not run out,
Moreover, when the vessel rests along the inner bottom of the tube, the heat generated by the burner is directly transferred to this chain, and the hot water inside the tube is heated to a higher temperature through the trigger wire. can.

Purpose of the invention: The present invention solves the above problems and provides a filter fixing device that can be operated normally without causing any bumping phenomenon during the coffee extraction operation, and that allows the filter to be attached and detached without strain. There is a particular thing.

Structure of the invention: In order to achieve this purpose, the invention includes the following:
In a filter fixing device for a saifon-type coffee boiler, the hook part of the locking rod with a hook connected to the lower surface of the filter mounting disc via a tension spring has a hook part that is bent on the outside at the upper end of the upwardly bent part. A latching part was provided for the tension chain, and the chain was hooked so that it did not touch the bottom of the vessel.

The chain latching portion formed at the upper end of the upwardly bent portion of the hook portion of this locking rod is in a state in which the locking rod can be easily inserted into and removed from the funnel tube, and the hook portion is engaged with the tube end. It may have any shape as long as it always creates a gap in which the chain can fit between the outside of the tube and the chain hook portion.

Embodiment: Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 4, the filter fixture 10 is made of stainless steel and has a through hole 11'.
A tension spring 12 whose one end is secured to the center of the lower surface of the disc 11 to obtain a fixing force, and a locking rod with a hook whose one end is connected to the lower end of the tension spring 12. 13 and a tension chain 16 for locking operation. The disk 11 is the same as a conventional one, and has a cloth filter 18 attached to its upper surface, and its outer periphery is bent into a curved surface so that it can be easily secured along the inner wall of the funnel of the boiler.

The locking rod 13 is made of stainless steel wire, and its upper end is bent into an eyeball shape and connected to the lower end side of the tension spring 12, and the lower end has a hook portion 14, and the hook portion is connected to the funnel tube portion 2''. Tension chain 1 for locking to
6. A mounting eye 14'' is bent and wound, and this eye 14'' is formed so as to be located below the bottom of the hook portion 14 so that it can be secured to the end of the tube portion 2'' without any problem. The length of the locking rod 13 is such that when installing the filter 18 in the funnel 2 using the fixing device 10, the length of the locking rod 13 is such that when the filter 18 is installed in the funnel 2, the length of the hook portion 14 is increased by adding enough extension to generate the required tensile reaction force on the tension spring 12. The hook part 14 of the locking rod 13 has a length that can be locked to the end of the tube (as an example, the distance from the eye position to the hook is about 80 mm). A loop 15 of an appropriate size is formed, and a latching portion 15' is provided on the upper side of the loop 15, into which a part of the chain strip 6 is received.
The length of the chain strip 16 is the same as before (approximately 50 to 50 mm)
Alternatively, it may be longer than the conventional one in order to facilitate the mounting operation.

With this configuration, when attaching the filter 18 to the funnel 2, the locking rod 1 can be used as in the conventional case.
3 through the pipe section 2'', the tension chain 16 is suspended outside the pipe, and then pulled to resist the force of the spring 12 and lock the locking rod 1.
When the hook part 14 at the third end is locked to the pipe part 2'', the loop 15 formed at the end of the upwardly bent part 14' of the hook part engages the outer wall of the pipe 2'' and the latching part 15 above the loop 15. A gap is formed between the latching part 15' and the latching part 15'. After the locking operation, lift the hanging chain 16 and hook it to reduce the amount of hanging, and then add the required amount of water. If the funnel 2 is attached to the mouth of the vessel 1, the chain 16 will not touch the bottom of the vessel 1 at all, as shown in FIG.

If you boil coffee according to the prescribed procedure in this way, no matter what operation you perform, there will be no bumping phenomenon during extraction, and you will be able to boil coffee with peace of mind. This proves the assumption that the cause of the bumping phenomenon was that when the chains came into contact with the bottom of the Betsu cell, and when it came to a standstill, heat was rapidly transferred and bumping occurred.

Note that when removing the funnel, the operations may be performed in reverse order.

In addition, the shape of the hook part of the chain can be changed as necessary, such as making the chain fit inside the loop or forming an even smaller hook at the end of the hook so that it does not get caught on the neck of the funnel. Any shape is fine. Of course, it is also a requirement that the chains be easy to attach and detach.

Effects of the invention: As mentioned above, according to the invention, even though it has an extremely simple configuration, it can be used without any worry at all, instead of the anxiety and danger that existed when handling a conventional siphon-type coffee boiler. It can be said that the practical effects of being able to boil coffee under arbitrary conditions and making it easier to handle are significant.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of one embodiment of the filter fixing device of the present invention, Fig. 2 is an enlarged front view of the main parts, Fig. 3 is a right side view of Fig. 2, and Fig. 4 is a diagram showing how it is used.
FIG. 5 is a diagram showing how a conventional coffee brewer is used. 1...Bethel, 2...funnel, 2'...slanted surface,
2″...Pipe part, 10...Filter fixture, 11,
21... Disc, 12, 22... Tension spring, 1
3, 23...Latching rod, 14,24...Hook part,
14'...Upward bent part of the hook, 15...Loop, 15'...Latching part, 16, 26... Chain strip,
18, 28... Filter.

Claims (1)

[Scope of utility model registration request] The hook portion of the locking rod with a hook connected to the lower surface of the filter mounting disk via a tension spring is provided with a hook portion of a tension chain strip wound and bent on the outside of the hook at the upper end of the upwardly bent portion. A filter fixing device for a saif-on type coffee boiler.