JP2003314057A - Form for gutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form for a gutter reducing operators' labor for the work of removing the form from cured mortar, and making a pair of damaged separated pieces repairable on site, for solving the problems of conventional forms for veranda side gutters: that conventional ones require heavy labor on the part of operators because they are installed through the process of heating a thermally contracting form releasing material in a heating furnace to mount the releasing material to a wooden core having a vertical cross section in the form of an inverted trapezoid, and then attaching specially designed end fittings to their end faces, and also because they are removed through the process of boring holes in the end fittings and inserting bars therein to remove the forms from cured concrete; and the form releasing material is not reusable if damaged during the removal. <P>SOLUTION: The form for a gutter includes a bar-shaped form body 1; a through-hole 2 penetrating the form body 1 from its upper to lower sides and having a threaded groove in at least a portion thereof; and a bolt 5 to be threadedly inserted into the through-hole 2 and being longer than the through- hole 2 so that its tip can move into and out of the lower end of the through-hole 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove mold.

[0002]

2. Description of the Related Art Conventionally, a large number of applications have been filed for a plate-shaped groove form, that is, a gutter form for forming a drainage groove attached to a wide and flat place such as a concrete plaza. However, as a form formed in the shape of a single rod for making a fine drainage ditch, a gutter form for a veranda (patent application) jointly filed by Kenei Kogyo Co., Ltd., the applicant of the present application, and Okabe Co., Ltd. Flat 11-
97110) was the only application.

FIG. 9 is a diagram showing this gutter formwork for a veranda. This groove form has a rod-shaped wooden core material A1 having an inverted trapezoidal vertical section, one side of which is a vertical plane B and the other side of which is an inclined plane B downward to one side. The wooden core material A1 is inserted into a tubular mold release material A2 made of a heat-shrinkable synthetic resin, and heated to shrink the mold release material A2. The lower part of the mounting plate A3 to the floating form is attached to the vertical surface B of the core material A1. The metal fittings A5 and A11 are fixed to both the wood openings of the core material A1 with the mounting plate A3. At least one of the metal fittings A5 or A11 (A5 in this conventional example) has a protruding portion protruding upward, and a demolding hole A6 is formed in this protruding portion. A4 is a screw for attaching the mounting plate A3 to the core material A1, and A16, A
Reference numerals 17 and A18 are screws for attaching the wood end fittings A5 and A11 to the core material A1. A7, A10, A12 are screws A
It is a hole that allows 16, A17 and A18 to communicate with each other. A
8, A9, A13, A14, A15 are metal fittings A5,
It is a folded piece of A11.

The above-mentioned gutter formwork for a veranda is for forming a drainage groove at a predetermined position before placing concrete. After fixing the mounting plate A3 with the two-stage nails to the wooden frame of the floating formwork mounted at this predetermined position, ready-mixed concrete is poured. When this fresh concrete was solidified, a bar was hooked on the demolding hole A6 formed in the wood entrance metal fitting A5, and one end of the gutter form frame for the veranda was pulled up forcibly and removed.

[0005]

The gutter formwork for a veranda is one in which a burl is hooked on a demolding hole of a wood mouth fitting and forcibly peeled off from one end of the formwork for a veranda. Since the gutter formwork for the veranda embedded in the hardened concrete is forcibly peeled off forcibly, it puts a great deal of labor on the worker and also removes the synthetic resin covering the wooden core material. The profile was frequently damaged. Reusing the balcony gutter frame with damaged release material, the exposed wooden core material due to the damage to the release material and the hardened concrete adhere strongly, and even if the burl is hooked on the demolding hole of the mouthpiece metal fitting. The balcony gutter form could not be easily removed from the hardened concrete. As a result, the mold release material was frequently damaged, and the gutter formwork for the veranda in which the mold release material was damaged was unavoidably discarded.

Further, in the gutter formwork for the veranda, the mold release material is made of a heat-shrinkable synthetic resin, and a wooden core material is inserted into the tubular synthetic resin and heated in a heating furnace to release the mold release material. Is contracted to cover the surface of the wooden core material. Since this wooden core absorbs moisture in the concrete and expands during the hardening of the concrete, the synthetic resin mold release material is easily damaged when it is pulled out from the hardened concrete. In the gutter formwork for the veranda where the release material was damaged in this way, the heating furnace could not be installed at the internal work site, and therefore the release material could not be repaired. Furthermore, a specially ordered wood mouth fitting is attached to the wood mouth of both ends of the wooden core material. Therefore, the manufacturing cost of the above-mentioned gutter formwork for balconies is very high.

The present invention can be easily removed from hardened concrete, and a damaged release material can be easily repaired even in a workplace where an operator cannot install a heating furnace, and these constituent members can be easily repaired. The purpose of the present invention is to provide an inexpensive groove formwork that uses all commercially available materials and does not use custom-made parts.

[0008]

A groove formwork of the present invention comprises a formwork body formed in a rod shape, and a through hole having a thread groove at least partially penetrating from the upper side to the lower side of the formwork body. ,
A bolt that is screwed into the through hole, is longer than the through hole, and has a tip that can be retracted from the lower end of the through hole.

A vertical cross section of the mold body is an inverted trapezoidal mold body, or the mold body is an inverted trapezoidal mold in which one side is formed vertically and the other side is formed as an inclined surface. It is a main body and is provided with a mounting plate that is attached to the vertical surface and has an upper part projecting upward in the form body, or the thread groove of the through hole is attached to either one of the upper and lower openings of the through hole. It can be used as a thread groove on the inner surface of the demon nut.

There is provided a first peeling body attached to an inclined surface of the mold body having an inverted trapezoidal vertical cross section, and a second peeling body attached to an end surface of the mold body. You can also

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The groove form of the present invention will be described below with reference to the drawings. As shown in the exploded perspective view of FIG. 1, the vertical cross-sectional view of FIG. 2, and the vertical cross-sectional views of the usage state of FIGS. 3 and 4, the mold body 1 has an elongated rod shape. The vertical cross-section when the mold body 1 is laid sideways is formed in an inverted trapezoidal shape. This inverted trapezoidal shape is sufficient if at least one side is formed as an inclined surface (in the figure, both sides are inclined surfaces, and the surface on the other side has a larger inclination than the surface on one side). Exist). The formwork main body 1 is made of wood, but a material having a shape restoring force, that is, a material that can automatically recover its original shape even when deformed by pressure like wood is preferable.

A through hole 2 penetrating from the upper side to the lower side of the mold body 1 is formed. A threaded demon nut 3 is press-fitted from the lower end of the through hole 2 to form a threaded through hole 2
And In the figure, the thread groove demon nut 3 is press-fitted from the opening at the lower end of the through hole 2, but may be press-fitted from the opening at the upper end of the through hole 2. Further, instead of the thread groove demon nut 3, a thread groove may be formed on the inner surface, or a tubular body having a flange at the end may be inserted and fixed, and the thread groove is formed directly in the through hole 2. Other methods may be used. It is preferable that one or more through holes 2 into which the thread groove demon nut 3 is press-fitted are formed in one mold body 1, and a plurality of through holes 2 are formed according to the length of the mold body 1. A sealing plug 4 made of synthetic resin is attached to the opening at the lower end of the threaded demon nut 3 so that the mortar X1 before curing cannot enter.

A bolt 5 is screwed into the threaded through hole 2.
The length of the bolt 5 is longer than the length of the through hole 2 with a thread groove, that is, the height of the mold body 1. That is, when the bolt 5 is completely screwed into the through hole 2, the tip of the bolt 5 projects from the opening at the lower end of the through hole 2, and the mold body 1 in a state of being embedded in the cured mortar X2 is removed from the mortar X2. It is a length that can be lifted and easily removed (details will be described later).

A flat plate-shaped first peeling body 6 is attached to the inclined surfaces on both sides of the mold body 1. It is desirable to attach the first peeling body 6 with a strong adhesive 8 so as not to cause unevenness on the surface. Depending on the shape of the side surface of the mold body 1, the first peeling body 6 may be attached only to one inclined surface.

The second peeling body 7 is attached to both end faces which are the mouths of the mold body 1 in which the first peeling body 6 is attached to the inclined side surface. It is desirable to attach the second peeling body 7 also with a strong adhesive 8. In addition, the second peeling body 7 may be attached only to the end of one end if necessary. The cross-hatched portion in FIG. 1 indicates the surface to which the adhesive 8 is attached.

The first and second peeling bodies 6 and 7 are made of a plate-like elastic body made of rubber or synthetic resin, and cover the inclined surface and the end surface of the side surface of the mold body 1 respectively. ing. When the first and second peeling bodies 6 and 7 are damaged, only the damaged first and second peeling bodies 6 and 7 are peeled off by a peeling agent (liquid), and the first prepared separately for repair. Second peeling body 6,7
Are adhered by the adhesive 8. This groove form is for forming a groove for drainage on a flat surface such as a parking lot formed of mortar X2. The wooden mold body 1 embedded in the mortar X1 absorbs water and expands in the process of hardening the mortar X1. However, since the first and second peeling bodies 6 and 7 are formed of elastic bodies, the shape of the groove formed by absorbing the expanded volume of the mold body 1 is not affected.

As shown in FIG. 3, the groove formwork (the tip of the screwed bolt is the main body of the formwork) at a predetermined position of the base formed by combining deformed rods (not shown) with a fitting or a small amount of mortar. (A state in which it does not project from the lower end) of (1) is temporarily fixed, and then a large amount of mortar X1 is placed. At this time, a liquid release agent may be applied to the surfaces of the first and second release bodies 6 and 7 attached to the outer periphery of the mold body 1. The upper end surface of the groove form and the upper end surface of the mortar X1 are finished substantially uniformly.

As shown in FIG. 4, the cast mortar X1
The bolt 5 is strongly screwed into the through hole 2 of the mold body 1 at the time when is cured to become the mortar X2. The peeling bodies 6 and 7 and the mortar X2 cannot resist the pressure of the screwed-in bolt 5.
The gaps are separated, and the groove form moves slightly upward. The space between the mortar X2 and the peeling bodies 6 and 7 was peeled off, and the groove mold that had moved upward was removed, and the surface of the groove left behind was mortar X1.
Finish with.

In the groove mold having the above-described structure, a bolt 5 which is retractable from the opening at the lower end of the through hole 2 is screwed into the through hole 2 having a thread groove in the vertical direction of the frame body 1. With the surface of the mold body 1 exposed, the bolt 5 of the groove mold embedded in the mortar X1 is strongly screwed in when the mortar X1 hardens to become the mortar X2. The mortar X2 cured by the pressure of the screwed-in bolt 5 and the peeling bodies 6 and 7 are separated from each other, and the groove mold is lifted up. The grooved formwork thus raised can be easily removed from the hardened mortar X2 without forcing the worker to perform heavy work. At this time, it is more effective to apply a liquid release agent to the surfaces of the first and second release bodies 6 and 7 on the outer periphery of the mold body 1.

The conventional gutter formwork for a balcony has a mold release material A2.
If the damaged part is damaged, carry the damaged gutter form for the balcony to the factory, remove the mounting plate A3 and the metal fittings A5, A11 from the core material A1, remove the parting material A2, and remove the new parting material A2. I had to install it again. Therefore, the repair cost is very high, and most of them were not discarded and reused.

In the groove mold of the present invention, first and second peeling bodies 6 and 7 made of an elastic material are attached to the outer periphery of the mold body 1, and the bolt 5 is screwed into the mortar X2. When the mold body 1 is raised, the first and second peeling bodies 6 and 7 may be damaged. When the groove mold in which the first and second peeling bodies 6 and 7 are damaged is used without repairing,
The mold body 1 and the mortar X2 are firmly bonded to each other at the damaged portions of the first and second peeling bodies 6 and 7, and cannot be easily peeled off even when the bolt 5 is screwed in.

However, the groove formwork of the present invention has a great feature that it can be repaired at the work site. That is, the repair can be easily performed by removing only the damaged one of the first and second peeling bodies 6 and 7 and attaching the separately prepared first and second peeling bodies 6 and 7 for repair. Further, when the mold body 1 is made of wood, the mold body 1 is not cured until the mortar X1 hardens.
Absorbs the water in the mortar X1 and expands. But,
Since the first and second peeling bodies 6 and 7 are formed of elastic bodies, the volume of the expanded portion is set to the first and second peeling bodies 6 and 7.
Will not be absorbed and will not adversely affect the formation of the groove. Since the repair of the above-mentioned damaged place can be done by anyone at any construction site without a heating furnace, there is no need to carry the damaged groove formwork to the factory, and the repair cost is very low. Even if the first and second peeling bodies 6 and 7 of the groove form are damaged, almost the entire amount can be reused.

5 to 7 show another embodiment of the groove form of the present invention. The exploded perspective view of FIG. 5, the vertical cross-sectional view of FIG. 6, and FIG.
As shown in the vertical sectional view showing the mounting state of the
1 has an inverted trapezoidal shape with one side being a vertical side surface. The mounting plate 12 is attached to the vertical surface with nails or screws 13. The mounting plate 12 is formed to be higher than the height of the mold body 11, and the upper portion of the mounting plate 12 projects above the mold body 11 to form a two-stage nail or screw on the floating mold frame 53 shown in FIG. Etc. for attaching at 57. The surface shown by cross-hatching in FIG. 5 is a surface to be bonded with the adhesive 8.

FIG. 7 is a vertical sectional view showing a construction state in which a veranda is formed on a building and a groove is formed at the base of the handrail wall of the veranda. Floor formwork 51 of formwork for balcony
Is attached to a predetermined position, and an outer form 52 of a veranda form is erected at the end of the floor form 51. A receiving metal fitting 61 is attached at a predetermined position on the floor form 51, an edge frame 55 is attached on the receiving metal fitting 61, and the dam plate 54 is fixed to the edge frame 55. Then, the dam plate 54 and the outer form 52 are fixed by the concrete form fittings 62. Next, the crosspiece 56 is fixed on the edge frame 55 on the outer peripheral portion of one side surface of the dam plate 54. The floating form frame 53 is secured by the weir plate 54, the edge frame 55, and the splint 56 fixed in this way.
Is configured. The mounting plate 12 of the groove form frame is fixed to the pier 56 of the floating form frame 53 with a nail (two-stage nail or screw) 57 or the like.

Mortar (or ready-mixed concrete) X1 is cast between the outer mold 52 and the floating mold 53 of the veranda mold attached as described above and on the floor mold 51. The height of the mortar X1 placed on the floor form 51 is equal to that of the form body 11
The height of the upper surface of. Mortar X1 hardens and mortar X
2, the nail 57 and the like are removed from the mounting plate 12 of the groove mold, and the bolt 5 screwed into the through hole 2 of the mold body 11.
Screw in strongly. The tip of the screwed-in bolt 5 or the upper surface of the mortar X2 where the sealing plug 4 is hardened is strongly pressed, and the mold body 11 or the groove mold is lifted. After removing the floating groove formwork, the floating formwork 53 is removed, and the outer formwork 52 and the floor formwork 51 are disassembled and removed. As shown in FIG. 8, a veranda with a handrail wall in which a groove X3 is formed is completed after the groove frame is removed.

The groove formwork having the above structure has the same effect as that of the groove formwork of the first embodiment described above, and no special order member is used for the constituent members including the first embodiment. Since all are commercial products, the material procurement cost is low and the groove formwork can be manufactured at low cost.

[0027]

In the grooved mold according to the present invention, a bolt which is retractable from the opening at the lower end of the through hole is screwed into the through hole with a thread groove in the vertical direction of the mold body. When the bolt of the groove formwork whose surface is buried in the cured mortar is strongly screwed in, the first and second peeling bodies of the groove formwork separate from the mortar and the groove formwork is directed upward. Emerge. The raised groove mold can be easily removed from the hardened mortar without forcing the operator to perform heavy labor. Even when the mold body absorbs the water in the mortar and expands, the peeling body is formed of an elastic body, and therefore the expanded volume is taken as the first and second peeling bodies of the elastic body. Will absorb it. Therefore, the groove form can be easily removed from the hardened mortar.

First and second peeling bodies are individually attached to the side portion and both end surfaces of the mold body. Therefore, even if the first peeling body or the second peeling body is damaged when the groove mold is removed from the cured mortar, the separately prepared first and second repair bodies are used.
Only the first and second peeling pairs damaged by the peeling body can be replaced and repaired. Therefore, there is no need to transport it to the factory for repair, and it can be repaired and reused quickly and at low cost in a work site without a heating furnace.

The groove formwork described above does not use any custom-made components and is a general commercial product. Therefore, a very inexpensive groove formwork can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a groove mold according to the present invention.

FIG. 2 is an enlarged vertical cross-sectional view taken along the line AA after the groove frame of FIG. 1 is assembled.

FIG. 3 is a vertical cross-sectional view showing a construction state of the groove formwork according to the present invention.

FIG. 4 is a vertical cross-sectional view showing a state in which the bolts of the groove form according to the present invention are strongly screwed in and the groove form is floated.

FIG. 5 is an exploded perspective view showing another embodiment of the groove form (for veranda) of the present invention.

6 is an enlarged vertical cross-sectional view taken along line BB of the groove form shown in FIG. 5 after assembling.

FIG. 7 is a vertical cross-sectional view showing a construction state of the groove form (for veranda) of FIG.

8 is a vertical cross-sectional view showing the grooved veranda after removing all the molds from the vertical cross-sectional view of FIG. 7.

FIG. 9 is an exploded perspective view of a conventional gutter formwork for a balcony.

[Explanation of symbols]

1 Formwork body 2 through holes (with thread groove) 3 demon nut 4 Sealing plug 5 Volts 6 First peeling body 7 Second peeling body 8 adhesive 10 Formwork body 12 Mounting plate 13 nails, screws, etc.

Claims (5)

[Claims] 1. A rod-shaped mold body, a through hole penetrating from an upper side to a lower side of the mold body and having a thread groove at least in a part thereof, and screwed into the through hole and longer than the through hole. A groove formwork, characterized in that a tip is provided with a bolt that can be retracted from the lower end of the through hole. 2. The groove formwork according to claim 1, wherein the formwork body is a formwork body having a vertical cross section formed in an inverted trapezoidal shape. 3. The form body is an inverted trapezoidal form body having one side formed as a vertical surface and the other side formed as an inclined surface, and the form body is attached to the vertical side surface, and the upper part of the form body is attached. The groove formwork according to claim 1 or 2, further comprising a mounting plate projecting upward. 4. The thread groove of the through hole is a thread groove on the inner surface of a demon nut attached to either one of the upper and lower openings of the through hole. 1
Form for groove according to the item. 5. A first peeling body attached to an inclined side surface of a mold body having an inverted trapezoidal vertical cross section, and a second peeling body attached to an end surface of the mold body. The grooved mold according to claim 1 or 2, further comprising: