JPH022571Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a formwork for molding a manhole mouth ring holder, which is a secondary product of concrete, and in particular, a manhole cover holder provided on the top of the mouth ring holder. This invention relates to a mold for forming a manhole opening ring holder, which allows adjustment of the installation height of the opening ring forming the opening ring.

First, an overview of this type of mouth ring holder will be explained with reference to FIG.

The mouth ring holder shown in FIG. 3 was molded using a molding frame according to an embodiment of this invention which will be described later.

An annular opening ring holder 20 made of a secondary concrete product is installed on the upper surface of the inclined wall B installed at the upper end of the concrete shaft of the manhole. A plurality of locations have cup-shaped recesses 20a lined with cup-shaped lining members 17, and each cup-shaped recess 20a
A stud bolt 2 is erected at the center of the cup-shaped lining member 17, passing through a center hole at the bottom of the cup-shaped lining member 17. Also, on the upper part of this stud bolt 2 is a lower flange 14 of a mouth ring 14 that forms a manhole cover holder.
The opening ring 14 is placed on the fixing nut 4 screwed into each stud bolt 2 by being inserted into the support hole 14c (see FIG. 2) provided in the stud bolt 2.

Note that ribs 14d are overhang-molded at a plurality of locations on the outer peripheral wall of the mouth ring 14.
A spacer block 5 is placed in the gap between the and the mouth ring holder 20 as shown in the figure, or a concrete material is filled in the gap.

By the way, after a certain period of time after manhole construction,
Subsidence occurs in buried objects due to the weight load of passing vehicles, etc., and this often creates a level difference between the top surface of the mouth ring 14 and the road surface, posing a danger to pedestrians and passing vehicles. In this case, the mouth ring holder 2 mentioned above
According to the structure of No. 0, the mounting height of the mouth ring 14 can be easily raised by changing the screwing position of the fixing nut 4, so there is an advantage that repair work for subsidence can be carried out easily.

The purpose of the present invention is to make it possible to easily perform secondary concrete molding of this type of mouth ring holder using a small amount of formwork, and to position and attach the mouth ring and the mouth ring holder through stud bolts and support holes. To provide a mold for molding a mouth ring holder that facilitates the process.

As a means for achieving the above object, the mold for molding a mouth ring holder according to the present invention includes the mouth ring 14 set with the flange 14b facing upward, and the flange 14b is set as the mouth ring holder. The mouth ring 14 serves as the bottom frame of the molding form, and the flange 14b serves as the bottom frame. The stud bolt 2 has an upper end that protrudes upward through a center hole of a cup-shaped lining member 17 that is installed with the opening facing downward, covering each of the support holes 14c, and is connected to the flange 14b. A stud bolt 2 with a fixing nut 4 screwed between the stud bolts 2 between the shaped lining members 17, an outer frame 15 having a diameter that circumscribes the outer peripheral surface of the mouth ring holder 20, and the mouth. An inner frame 16 having a diameter that is inscribed in the inner circumferential surface of the ring holder 20, and an outer frame 15 and an inner frame 16 that form an upward annular molding groove space together with the flange 14b as the bottom frame. It is characterized by what it did.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The formwork of this embodiment includes the above-mentioned mouth ring 14 whose flange 14b forms an annular bottom frame, and a set of outer frames 15.
, a set of inner frames 16 , the above-mentioned lining member 17 formed by a plurality (three) of hemispherical cups, the above-mentioned stud bolts 2 and filler nuts 9 , the above-mentioned fixing nuts 4 , and a plurality of (three) hemispherical cups. The assembly consists of nine (9) assembly clamps 10, and five of these components, the mouth ring 14, the inner lining member 17, the stud bolt 2, the filler nut 9, and the fixing nut 4, will be described later. After processing, the products are made into mouth rings and pedestals as they are, and therefore these five items cannot be used continuously for molding, and must be replenished each time they are processed.

Therefore, the shape of the mouth ring 14 as a bottom frame is simply the shape of the mouth ring 14 shown in FIG. Projecting pieces 14a for receiving the inner frame 16 protrude at a plurality of locations (three locations).

Note that stud bolts 2 are inserted into support holes 14c that are bored at multiple locations (three locations in the figure) on the circumferential line of the flange 14b on the upper surface of the mouth ring 14, and a cover is provided on the upper surface of the support hole 14c. The attached cup-shaped lining member 17 is fixed and held by a fixing nut 4 and a filler nut 9 to a stud bolt 2 that passes through the lining member 17 upward.

Next, the outer frame 15 is formed into a split mold of a plurality of (three) frame plates 18, and each frame plate 18 has a lower half foot plate 18a that connects to a flange 1 serving as a bottom plate.
4b, and the diameter is reduced toward the center, and the outer peripheral wall of the frame plate 18 is formed with an end flange and a rib in the middle, and the space between each frame plate 18 is After being assembled with the clamp 10,
It circumscribes the flange 14b serving as the bottom frame.

In addition, the inner frame 16 is formed into a split mold of a plurality of (three) frame plates 19, and the inner circumferential wall of each frame plate 19 is similarly formed with an end flange and an intermediate rib. The frame plates 19 are assembled using the clamps 10, and are inscribed in a flange 14b serving as a bottom frame while resting on the projections 14a of the mouth ring 14.

In reality, a wedge-shaped joint plate is interposed at one of the three split parts, but it is not shown in the drawing.

In order to mold a pedestal using the formwork of the embodiment configured as described above, concrete material is poured into the molding groove space 21 between the outer frame 15 and the inner frame 16 to a required level L, and then After the concrete hardens, the formwork is released, and a product in which the concrete mouth ring holder 20 and the mouth ring 14 are integrated is completed, and this product is turned over and carried out.

To construct the upper end of the manhole using this product, place the mouth ring holder 20 on the inclined wall B as shown in Fig.
After the stud bolt 2 is installed on the top, the stud bolt 2 protrudes from the bottom flange 14b of the mouth ring (bottom frame during machining) 14.
Another fixing nut 4 is screwed together, and both fixing nuts 4, 4 are adjusted to align the upper surface of the mouth ring 14 with the road surface.

As described above, by using the formwork of the embodiment, it is possible to manufacture a mouth ring holder in which the mounting height of the mouth ring can be adjusted through easy secondary concrete molding.

As described above, according to the mold for molding the mouth ring holder according to the present invention, the flange 14b of the mouth ring 14 is used as it is as the bottom frame of the mold, so there is no need to use a dedicated bottom frame. , Mouth ring holder 2 with less formwork
0 can be molded.

Also, when molding, the concrete mouth ring holder 2
The support hole 14c provided in the flange 14b of the mouth ring 14 used as the bottom frame is inserted into the stud bolt 2 protruding from the bottom frame, and the cup-shaped lining member 17 covering the support hole 14c is inserted from the poured concrete. A fixing nut 4 is screwed into the mouth ring holder 20 and the mouth ring 1 via the stud bolt 2 and the support hole 14c.
4, there is a risk that the position of the stud bolt 2 of the concrete mouth ring holder 20 and the support hole 14c of the mouth ring 14 will be mismatched, resulting in a defective product, as in the conventional case. Moreover, there are excellent effects such as no need for the work of assembling the mouth ring holder 20 with the mouth ring 14 after molding.

[Brief explanation of drawings]

FIG. 1 is a plan view of a mold for forming a mouth ring holder showing an embodiment of the present invention, FIG. 2 is a front cross-sectional view of the same, and FIG. 3 is a cross-sectional view of a product processed using the same mold. 20... Mouth ring holder, 2... Stud bolt, 4
... Fixing nut, 14 ... Mouth ring, 17 ... Inner lining member, 15 ... Outer frame, 16 ... Inner frame.

Claims (1)

[Scope of Claim for Utility Model Registration] The ring-shaped concrete mouth ring holder 20 has cup-shaped recesses 20a lined with cup-shaped lining members 17 at multiple locations on the circumference of the upper surface, and each cup-shaped recess A stud bolt 2 is erected at the center of the cup-shaped lining member 17 through a center hole at the bottom of the cup-shaped lining member 17, and a bottom flange 14 of the opening ring 14 forming the manhole cover holder is attached to the upper part of the stud bolt 2.
In the molding frame for the mouth ring holder 20, in which the mouth ring 14 is placed on the fixing nut 4 screwed into each stud bolt 2 by extrapolating the support hole 14c provided in b. , the mouth ring 14 that is set with the lower surface of the flange 14b facing upward, and the flange 14b serves as a bottom frame of a mold for molding a mouth ring holder; and the bottom frame. The stud bolt 2 is erected with its intermediate portion inserted into each support hole 14c provided at a plurality of locations on the circumferential line of the flange 14b, and its upper end portion covers each support hole 14c. A fixing nut 4 is inserted between the stud bolt 2 between the flange 14b and the cup-shaped lining member 17, and protrudes upwardly through the center hole of the cup-shaped lining member 17 installed with the opening facing downward. A stud bolt 2 screwed into the socket; an outer frame 15 having a diameter circumscribing the outer peripheral surface of the ring holder 20; and an inner frame 16 having a diameter inscribed in the inner peripheral surface of the ring holder 20. A mold for molding a manhole mouth ring holder, comprising an outer frame 15 and an inner frame 16, which together with the flange 14b as the bottom frame form an upward annular molding groove space.