JPH0131437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to a contact filter medium and a manufacturing apparatus for the purpose of making the contact filter medium of an activated sludge hotbed for a septic tank undamaged, easy to replace, and capable of mass production.

(Prior art) In conventional contact filter media for activated sludge hotbeds for septic tanks, both ends of the net were glued to the terminal member made of irregularly extruded material, so the net often came off from the terminal member, and the support rod The hole diameters of the insertion holes were uneven, and there were many variations in dimensions, requiring a lot of man-hours for assembly and replacement work, which was a bottleneck in mass production.

(Structure of the Invention) In order to eliminate the above-mentioned problems all at once, the present invention includes inserting both ends of the net and injection molding to integrally form a contact filter medium body with a fixing plate, and a plurality of contact filter medium bodies. The present invention will be described based on the drawings of the embodiments, which are assembled in parallel in the vertical direction or in which a plurality of pieces connected in the horizontal direction are assembled in parallel in the vertical direction.

Example 1 As shown in Fig. 1, air is blown into the concrete septic tank T, which is equipped with a sewage inflow pipe D and a treated water outflow pipe S, to activate the purifying bacteria that purify the sludge K. Install the air blowing pipe A, and open the septic tank T.
A contact filter medium 1 shown in FIG. 2 and described in detail later is installed inside.

To explain the contact filter medium 1 in detail, as shown in FIG. 2, a plurality of contact filter medium bodies 2, which will be described in detail later, are arranged in parallel in the vertical direction (back and forth direction in FIG. 2) by a support rod 3 using a vinyl chloride pipe. Assemble each branch 3
The support rod receivers 4 fitted on both ends of the tank are fixed to contact filter media receivers 5 and 5' attached to the upper and lower surfaces of the inner surface of the septic tank W, respectively.

To explain the contact filter medium main body 2 in more detail, the third
As shown in the figure, an upper fixing plate 9 and a lower fixing plate 10 are integrally insert-molded onto the upper and lower edges 7, 8 of the polyester net 6 using an injection mold 11, which will be described later. The upper fixing plate 9 is provided with a plurality of insertion holes 12 through which the supporting rods 3 are inserted, and the lower fixing plate 10 is provided with insertion holes 12 through which the supporting rods 3 are inserted.
An insertion hole 13 is provided at one location in the center.

To describe the injection mold 11 in more detail, the fourth
As shown in FIGS. 6 to 6, a movable mounting plate 14,
A movable mold 19 consisting of a push-up plate 15, a push-up rod 16, a base plate 17, and a core mold 18 and a fixed mold 23 consisting of a fixed mold mounting plate 20, a runner distribution plate 21, and a cavity mold 22 are slid by guide posts 24. Assembled so that it can be freely engaged and disengaged.

A cavity 25 for molding the upper fixing plate 9 and a cavity 26 for molding the lower fixing plate 10 are carved parallel to the longitudinal direction on both sides of the core mold 18,
A box storage groove 29 is provided between the cavities 25 and 26 to accommodate the box 28 that accommodates the extra portion 27 of the net 6 during the molding process.
A mounting groove 32 for a jig 31 consisting of a box support frame 30 for supporting the housing is provided. Note that 3 in Figures 1, 4, and 6
3 and 34 are replacement pieces, 35 is a mounting screw, 36 is an insertion hole protrusion, 37 is a runner, 38 is an overhang rod insertion hole, 39
40 is the injection port joint, M is the accumulated water, and W is the wall of the septic tank T.

(Operation of the invention) The operation of the invention will be explained based on the drawings of the embodiment.

As shown in FIG. 1, in a septic tank T, bacteria adhering to the nets 6 of the contact filter media body 2 of the contact filter media 1 suspended in large numbers cause the accumulated water M containing filth to flow in from the sewage inflow pipe D. It is activated by the air blown from the air blowing pipe A, and is purified while rotating slowly as shown by the arrow P, and the purified treated water is discharged from the treated water flow pipe S to a sewer pipe or the like.

The contact filter medium main body 2 is made by using an injection molding mold 11 shown in FIGS. 3 to 6 to attach the central margin 27 of the polyester net 6 to the core mold 18 of the injection molding mold 11. Groove 29
It is stored in the central case 28 of the jig 31 fitted in the jig 31, and both edges 7 and 8 are temporarily fixed to the case support frame 30 of the jig 31 with magic tape (registered product name).
When the movable mold 19 is pressed against the fixed mold 23 shown in FIG.
The ends 7 and 8 of the net 6 are inserted, and the upper fixing plate 9 and the lower fixing plate 10 are simultaneously molded. 13 is molded. The ends 7 and 8 of the net 6 are molded into the insertion holes 12 and 13 with the ends 7 and 8 being stretched approximately at the center of the insertion holes 12 and 13.

The movable mold 19 is separated from the fixed mold 23, and the cavity 25 is inserted into the cavity 25 by the push-up rods 16, 16 through the push-up rod (not shown) through the push-up rod insertion hole 38 via the push-up plate 15.
The upper fixing plate 9 and lower fixing plate 10 molded in 26 are projected from the cavities 25 and 26 with both end edges 7 and 8 of the net 6 inserted therein. Since the extra portion 27 of the net 6 is housed within the box 28, it does not interfere with injection molding.

As shown in FIGS. 2 and 3, a plurality of contact filter media bodies 2 taken out from the injection mold 11 are arranged in parallel and inserted into the insertion holes 12 and 1 of the upper fixing plate 9.
2, ... and the support rod 3 made of vinyl chloride pipe is inserted into the insertion hole 13 of the lower fixing plate 10.
The end edges 7 and 8 of the net 6 stretched inside the support rod 3 are penetrated and inserted, and the support rod receivers 4 are fitted and inserted into both ends of these support rods 3, and the support rod receivers 4 at both ends are inserted.
The contact filter media 1 is suspended in the septic tank T by fixing the contact filter media 4, .

When the mounting pieces 33 and 34 attached to both ends of the cavities 25 and 26 are replaced by removing the mounting screws 35 shown in FIG. 4, a contact filter medium body 2 having an upper fixing plate 9 and a lower fixing plate 10 of various sizes can be obtained. It will be done.

Although not shown, a plurality of contact filter medium bodies 2,
It is also possible to hang a plurality of sheets in parallel in a large-capacity septic tank by binding them in a row in the horizontal direction using connecting rods or the like.

(Effects of the Invention) Since the present invention has the above-described configuration, it has the following advantages.

(1) Since the upper and lower edges of the net are inserted into the upper and lower fixing plates and injection molded, the net will not come off the fixing plates, significantly increasing the service life of the contact filter media.

(2) The pore size is accurate and stable, resulting in a contact filter medium of high quality and therefore easy to assemble.

(3) When inserting the support rod into the insertion hole of the fixing plate, the net inserted in the middle of the insertion hole is penetrated, so the support rod becomes difficult to remove due to torn debris, and the installation of the support rod becomes difficult. It gave cushioning properties to the.

(4) Since the net edge is inserted and injection molded, it is easy to assemble, requires few manufacturing steps, and is extremely inexpensive.

(5) Because the dimensions are uniform and the structure is simple,
Replacement work can be done easily and quickly.

(6) Injection molding can be performed with the extra portion of the net stored in the jig box set in the mold.

(7) Since replacement pieces are removably attached to both ends of the cavity, fixed plates of different sizes can be injection molded with one mold, which is economical.

[Brief explanation of drawings]

Fig. 1 is a partially disclosed perspective view of a septic tank using the contact filter medium of the present invention, Fig. 2 is a perspective view illustrating the assembly of the contact filter medium, and Fig. 3 is a perspective view of the main body of the contact filter medium.
Fig. 4 is a plan view of the molding surface of the injection mold for the contact filter medium body, Fig. 5 is a plan view of the jig used for molding,
FIG. 6 is a sectional view of the injection mold. (Explanation of symbols of main parts), 1...Contact filter medium,
2... Contact filter medium body, 3... Support rod, 6... Net, 7... Edge (at the upper end of the net), 8... Edge (at the lower end of the net), 9... Upper fixing plate, 10... Lower fixing plate, 11... Injection mold, 12... Insertion hole (of the upper fixing plate), 13... Insertion hole (of the lower fixing plate), 18... Core mold, 25... Cavity (upper fixing plate) , 26... Cavity (lower fixing plate),
27... Surplus part (net), 28... Box, 2
9...Box groove, 30...Box support frame, 31...Jig, 32...Mounting groove, 33...Replacement piece, 34...
Replacement piece, T...Septic tank.

Claims (1)

[Scope of Claims] 1. An activated sludge hotbed for a septic tank, characterized in that contact filter media bodies made by injection molding are assembled vertically and horizontally by inserting both ends of a net made of polyester or the like into a terminal member made of synthetic resin. contact filter media. 2. Provide insertion holes for assembly rods in the upper and lower fixing plates of both ends, arrange a plurality of contact filter media vertically and horizontally, and insert the assembly rods into the insertion holes by piercing the inserted nets and inserting them vertically. The contact filter medium for an activated sludge hotbed for a septic tank according to claim 1, wherein the contact filter medium is assembled in the direction shown in FIG. 3. A method according to claim 1, characterized in that a plurality of contact filter media are arranged in a horizontal row and assembled by laterally inserting a ring provided on a fixing plate at the edge of the net using an assembly rod. Contact filter media for activated sludge hotbeds for septic tanks. 4. Activated sludge hotbed for septic tanks, comprising a jig for accommodating the extra portion of the net in the center of the core mold, a case for accommodating the jig, and an injection mold for the contact filter medium body provided with a storage groove. contact filter media manufacturing equipment. 5. A contact filter medium for an activated sludge hotbed for a septic tank according to claim 4, characterized in that the contact filter medium is equipped with an injection molding mold that is attached to both ends of the cavity of the fixed plate at the edge of the net so that replacement pieces can be freely replaced. Manufacturing equipment.