JPH09267317A - Manufacture of precast concrete foundation and device for manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a precast concrete foundation by which it is possible to install a bar member for preventing an animal from intruding through a ventilation port in a precasting step as well as a device for manufacturing the precast concrete foundation. SOLUTION: A concrete G is poured and tamped into a molding frame in such a state that a notched part forming member 28, for forming a notched part 26, which can retain a bar member 48 in freely detachable manner with both end parts of the bar member 4 jutted out of both lateral parts of the member 28, is mounted with the bar member 48 arranged along a face part for forming the upper face 24 of a foundation for a molding frame. After the concrete is cured, the notched part forming member 28 is removed. Thus both end parts of the bar member 48 which is jutted out of the member 28 are embedded into the concrete C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a precast concrete foundation which is manufactured in advance in a factory or the like and is transported to the site for construction.

[0002]

2. Description of the Related Art It is common practice to use precast concrete members that are manufactured in advance in factories and transported to the construction site for construction. Naturally, the foundation is also made of precast concrete. Has been. By the way, when the foundation is made of precast concrete, a bar member for preventing the invasion of animals and the like is attached to the ventilation port in the field construction.

[0003]

However, if the rod member for preventing the invasion of animals or the like is attached to the ventilation opening in the field construction as described above, it goes without saying that the attachment of the rod member requires a lot of time and time. There was a problem that it would take.

Therefore, an object of the present invention is to provide a method and an apparatus for manufacturing a precast concrete foundation in which a rod member for preventing invasion of animals or the like can be provided in a ventilation port at a precast stage rather than on-site construction. That is.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is a precast concrete foundation having a notch portion serving as a ventilation opening formed on one end surface side which is the upper surface of the foundation. A method for manufacturing by casting concrete in a frame, wherein a notch portion for forming the notch portion, which can be detachably held in a state in which both ends of the rod member are projected from both sides, is formed. Using a member, the notch forming member, in a state where the bar member is attached along the surface portion for forming the base upper surface of the mold, placing concrete in the mold, It is characterized in that the mold and the notch forming member are removed after the concrete is hardened. As a result, both ends of the bar member protruding from the notch forming member when the concrete is poured into the formwork are embedded in the concrete, and when the notch forming member is removed after hardening of the concrete, the notch is formed. At the same time, the bar members are passed between the concrete on both sides of the notch along the upper surface of the foundation formed together with the bar members.

According to a second aspect of the present invention, in the method according to the first aspect, the notch forming member is disposed in the mold through the through hole into which the rod member is fitted and the through hole. It is characterized in that it is provided with an elastic member having a cutout that is pulled out in the opposite direction to the surface portion in the state. As a result, when the notch forming member is pulled out in the direction opposite to the forming direction of the crack after hardening of the concrete, the bar member held in the through hole relatively moves along the crack while deforming the elastic member. It is pulled out from the end of the container, and thus the notch forming member is removed.

A third aspect of the present invention is a manufacturing method for manufacturing a precast concrete foundation having a concave portion formed on one surface by pouring concrete into a formwork, wherein a screw is provided on one end side. A recess forming member for forming the recess, which is capable of detachably holding an insert member provided with a hole with a bolt screwed into the screw hole, is used. After placing the concrete in the mold by adhering it to the mold while being placed on the installation side, after hardening of the concrete,
It is characterized in that the mold is removed while peeling off the adhesion, and then the recess forming member is removed by releasing the screwing of the bolt. As a result, when the concrete is poured into the formwork, the insert member held by the recess forming member is embedded in the concrete, and after the concrete hardens, the formwork is removed while peeling off the adhesive, and then the screw of the bolt is removed. When the recess forming member is removed by releasing the combination, the recess is formed and
The screw hole of the insert member is opened in the recess.

According to a fourth aspect of the present invention, there is provided a manufacturing apparatus for manufacturing a precast concrete foundation in which a cutout portion serving as a ventilation opening is formed on one end surface side which is a top surface of the foundation.
Formwork for forming an outer surface including the foundation upper surface of a precast concrete foundation, and while holding the bar member detachably in a state in which both end portions thereof are projected from both sides, the foundation upper surface of the formwork is A cutout forming member for forming the cutout, which is fixed in a state in which the rod member is placed along the surface for forming the cutout. As a result, when the notch forming member in which both ends of the rod member are projected from both sides is attached to the surface portion for forming the base upper surface of the formwork, concrete is poured into the formwork. , Both ends of the bar member protruding from the notch forming member will be embedded in the concrete, and when the notch forming member is removed after hardening of the concrete, the notch is formed and the base upper surface formed with this The bar members will be passed between the concretes on both sides of the cutout along.

According to a fifth aspect of the present invention, in the apparatus according to the fourth aspect, the notch forming member is disposed in the mold through the through hole into which the rod member is fitted and the through hole. It is characterized in that it is provided with an elastic member having a cutout that is pulled out in the opposite direction to the surface portion in the state. As a result, when the notch forming member is pulled out in the direction opposite to the forming direction of the crack after hardening of the concrete, the bar member held in the through hole relatively moves along the crack while deforming the elastic member. It is pulled out from the end of the container, and thus the notch forming member is removed.

[0010]

FIG. 1 shows a first embodiment of the present invention.
~ It demonstrates below with reference to FIG. 1 to 3 show an apparatus for manufacturing a precast concrete foundation, which comprises a bottom mold section 12 having a horizontally arranged surface section 11 and a vertically standing and parallel to each other. A pair of side mold parts 1 having facing surface parts 13 and 14
5 and 16 and a pair of side mold portions 19 and 20 having face portions 17 and 18 which can be vertically installed at right angles to the face portions 13 and 14 and can be opposed to each other in parallel with each other. The frame 21 is provided.

The bottom mold part 12 is formed by the surface part 11 on one side surface in the thickness direction of the precast concrete foundation. The side mold parts 15 and 16 form opposite side surfaces in the width direction of the precast concrete foundation in the respective surface parts 13 and 14, and are slidable with respect to the bottom mold part 12 in directions approaching and separating from each other. It is said that. Further, the surface portions 13 and 14 have a convex portion 23 for forming a concave portion on the side surface of the precast concrete foundation.
Are provided in plural.

The side mold portion 19 has a surface portion 17 on the upper surface 24 side (see FIG. 7C) of the precast concrete foundation.
The lower part is slidably and rotatably supported by the support shaft 19a so as to be able to move toward and away from the bottom mold part 12. The side mold part 20 forms the lower surface side of the precast concrete foundation in the surface part 18, and the lower part is supported by the support shaft 20a so as to be slidable and rotatable so as to be able to approach and separate from the bottom mold part 12. Further, the surface portion 18 is provided with a plurality of convex portions 25 for forming concave portions on the lower surface of the precast concrete foundation. The side mold parts 19 and 20 are brought close to each other, and the upper parts thereof are connected by a connecting member 22 in a state where the surface parts 17 and 18 are vertical.

The side mold portion 19 has a cutout portion 26 which serves as a ventilation port for the upper surface 24 of the precast concrete foundation.
A plurality of notch forming members 28 for forming (see FIG. 7C) on the upper surface 24 side are attached at a predetermined pitch.

This notch forming member 28 is shown in FIGS.
As shown in FIG. 3, surface portions 30 and 31 that are parallel to each other and surface portions 3 that are orthogonal to these surface portions 30 and 31 and are parallel to each other.
2 and 33 and the surface portions 32 and 33 are orthogonal to each other and the surface portion 3
Surface part 3 inclined so that the 0 side is closer to the surface part 31 side
And a base member 38 having a trapezoidal cross section formed in parallel with the surface portions 32 and 33 in the center between the surface portions 32 and 33 on the side of the surface portion 30, and a concave portion of the base member 38. 37
And a holding member 39 made of an elastic material such as rubber, which is fitted and fixed in the concave portion 37 so as to fill the space. The tip end surface portion 40 of the holding member 39 in the fitted and fixed state is flush with the surface portion 30, and the side surface portion 41 is the surface portion 34.
The side surface portion 42 is flush with the surface portion 35. Further, the holding member 39 may be detachably fitted to the base member 38.

The base member 38 has a plurality of screw holes 44 (not shown) into which screw members (not shown) for fixing the base member 38 at predetermined positions on the surface portion 17 of the side mold portion 19 are screwed from the side mold portion 19 side. In two places) on the side of the face portion 31. When the side mold part 19 is vertically installed, the base member 38 fixed to the side mold part 19 has the surface parts 32 and 33 arranged horizontally and the surface part 30 opposite to the surface part 17. It is placed in the state.

In the holding member 39, a through hole 45 penetrating from the tip surface portion 40 in parallel with the tip surface portion 40 is formed at a central position between the surface portions 32 and 33 while being fitted and fixed to the base member 38. A plurality of (two in the illustrated example) are formed at different distances, and a planar split is formed parallel to the surface portions 32 and 33 on the distal end surface 40 side from the through hole 45 on the opposite side of the distal end surface portion 40. The insert 46 is formed so as to come out of the distal end surface portion 40. Here, a rod member 48 (see FIG. 7), which will be described later, provided in the cutout portion 26 is fitted in the through hole 45, and the holding member 39 is fitted by its elastic force. Both end portions of the bar member 48 are provided on both side surface portions 41, 4
It can be detachably held while protruding from 2.

Next, a method of manufacturing a precast concrete foundation using the manufacturing apparatus having the above-described structure will be described in the order of steps. First, the side mold parts 15 and 16 are fixed to the bottom mold part 12 by moving the side mold parts 15 and 16 to predetermined positions corresponding to the width of the precast concrete foundation, and the side mold parts 19 and 20 also have a distance between them. It is moved and rotated to a predetermined position corresponding to the height of the precast concrete foundation, and is fixed to the bottom mold part 12 by the connecting member 22 or the like. In this state, the surface portion 11 and the surface portions 13, 14, 17,
18 are all orthogonal to each other, and the surface portions 13, 14 and the surface portions 17,
18 is orthogonal to the side mold parts 15, 16, 19,
The gap between 20 and the bottom mold part 12 is closed to form a container-like mold 21.

Here, the notch forming member 28 is attached to the side mold portion 19 in advance, and all the through holes 45 of the notch forming member 28 have side surface portions, as shown in FIG. 7 (a). The rod members 48 are fitted so that the ends of the rods 41 and 42 project from both sides. Note that this can be performed before, during, or after forming the mold 21. As described above, the notch forming member 28 is fixed to the surface portion 17 of the side mold portion 19 for forming the base upper surface 24 of the mold 21 with the rod member 48 along.

In this state, as shown in FIG. 7B, a predetermined amount of concrete C is placed in the mold 21 and the hardening of the concrete C is waited. After the concrete C is hardened, the side mold part 19 is slid laterally away from the other side mold parts 20. Then, the notch portion forming member 28 fixed to the side mold portion 19 is pulled out in the opposite direction to the slit 46, whereby the rod member 48 held in the through hole 45 elastically holds the holding member 39. Deforming while transforming 4
6 moves relative to each other and comes out from the end portion of the insert 46 on the side of the front end face portion 40, so that the notch portion forming member 28 is removed from the precast concrete foundation B as shown in FIG. 7C.

When the holding member 39 is detachably fitted to the base member 38, when the side mold part 19 is slid laterally away from other side mold parts 20, the side mold part 19 is slid sideways. Only the base member 38 fixed to the mold portion 19 is separated, and the holding member 39 remains on the precast concrete foundation B together with the bar member 48. Therefore, after that, the holding member 39 is moved to the bar member 48. From that 46
Will be removed along with.

Then, as described above, the side mold part 19 is slid and then rotated to make a precast concrete foundation B.
On the other hand, the side mold parts 15 and 16 are slid in a direction in which they are separated from each other to be separated from the precast concrete foundation B, and the side mold parts 20 are slid and rotated to be separated from the precast concrete foundation B. Let As a result, the precast concrete foundation B is carried out from the bottom mold portion 12 from the side mold part 19 side or the side mold part 20 side opened by rotation, and the next precast concrete base structure is manufactured in the same manner as above. To do.

In the precast concrete foundation B manufactured as described above, both ends of the bar member 48 projecting from the notch forming member 28 when the concrete C is placed in the mold 21 are embedded in the concrete C. When the mold 21 and the notch portion forming member 28 are removed after the concrete C has hardened, the notch portion 26 is formed and
Along the base upper surface 24 formed with this, the rod member 4
8 will be passed between the concrete C on both sides of the notch 26. Therefore, the rod member 48 for preventing the invasion of animals or the like can be provided in the notch portion 26 which will be the ventilation port later in the precasting stage, not in the field construction.

Further, as described above, the notch forming member 28
The holding member 39 of the through hole 45 into which the rod member 48 is fitted.
Since it is made of an elastic material having a cutout 46 that escapes to the tip surface portion 40 side, by pulling out the cutout forming member 28 in the direction opposite to the formation direction of the cutout 46
The bar member 48 held in the through hole 45 is inserted into the slit 46.
Is passed through and is pulled out from the end thereof, and is separated from the notch portion forming member 28. Therefore, the notch forming member 28 can be easily formed.
Can be removed from the precast concrete foundation B.

Next, a second embodiment of the present invention will be described with reference to FIGS.
The difference from the first embodiment will be mainly described below with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. As shown in FIGS. 8 and 9, in the side mold part 19 of the second embodiment, the lower part is rotatably supported by the support shaft 19a with respect to the bottom mold part 12, and similarly the side mold part 19 is formed. The lower part of the unit 20 is also supported by the support shaft 20a so as to be rotatable only with respect to the bottom mold unit 12. The side mold parts 19 and 20 have respective surface parts 17,
The upper parts are connected by a connecting member 22 in a state where 18 is vertical.

Further, as shown in FIG. 10 and FIG.
The side mold parts 15 and 16 are slidable with respect to the bottom mold part 12 in directions of approaching and separating from each other, and the surface part 1
3, 3 and 14 are provided with a convex portion 23 for forming a large concave portion on the side surface of the precast concrete foundation B along the sliding direction.

Further, a recess forming member 51 shown in FIG. 12 for forming a recess is used on the side surface formed by the bottom mold portion 12 of the precast concrete foundation B.
The recess forming member 51 has a bottom plate 52 and a plurality of protrusions 53a to 53f formed on the bottom plate 52, and is attached to the bottom plate 52 at a predetermined position of the bottom mold part 12 ( See below).

The concave portion forming member 51 includes convex portions 53a to 53a.
Two protrusions 53a and 53e of 3f are hollow. And, in these hollow convex portions 53a and 53e,
Through holes 54 and 55 are formed, and the through holes 54 and 5 are formed.
Through holes 56 and 57 are also formed in the bottom plate 52 coaxially with 5.

As shown in FIG. 13, the recess forming member 51 has a screw hole forming member 6 having a screw hole 59 on one end side.
The insert member 62 in which 0 is provided and the curved reinforcing bar 61 is joined to the other side penetrates the screw hole forming member 60 in a state where the screw hole forming member 60 is in contact with the bottom plate 52 of the hollow convex portion 53a on the opposite side. The bolt 63 is inserted through the holes 54 and 56 and screwed into the protrusion 53a, and the insert member 62 is similarly joined to the protrusion 53e with the bolt 63 although not shown. The insert member 62 closes the through holes 54 and 55 in the contact state.

Next, a method of manufacturing a precast concrete foundation using the manufacturing apparatus of the second embodiment having such a configuration will be described in the order of steps. First, as shown in FIGS. 8 and 10, the side mold parts 15 and 16 are moved to a predetermined position corresponding to the width of the precast concrete foundation and fixed to the bottom mold part 12. Part 1
9 and 20 are also rotated so as to stand vertically, and fixed to the bottom mold portion 12 by the connecting member 22. In this state, the surface portion 11 and the surface portions 13, 14, 17, and 18 are all orthogonal to each other, the surface portions 13 and 14 and the surface portions 17 and 18 are orthogonal to each other, and the side mold portions 15, 16, 19, 20 and the bottom mold are The gap with the portion 12 is closed to form a container-like mold 21.

Here, similarly to the first embodiment, the end portions are projected from both sides of the side surface portions 41 and 42 into all the through holes 45 of the notch portion forming member 28 attached to the side mold portion 19. The rod member 48 is fitted in such a manner that Also,
In the second embodiment, the recess forming member 51, in which the insert member 62 is fixed by the bolt 63, is adhered to the predetermined position of the bottom mold portion 12 by the double-sided tape or the like on the bottom plate 52 thereof. Note that this can be performed before or during the formation of the mold 21.

As described above, the notch forming member 28 is fixed to the surface portion 17 of the side mold portion 19 for forming the base upper surface 24 of the mold 21 with the bar member 48, and the concave portion is formed. The forming member 51 is bonded to the mold 21 with the insert member 62 arranged on the concrete pouring side.

In this state, concrete C is placed in the mold 21.
Is poured in a predetermined amount and the hardening of the concrete C is waited. After the concrete C is hardened, as shown in FIG.
Is rotated in a direction away from the other side mold part 20. Then, the notch portion forming member 28 fixed to the side mold portion 19 is pulled out in the opposite direction to the slit 46,
As a result, the rod member 48 held in the through hole 45 relatively moves along the slit 46 while elastically deforming the holding member 39, and comes out of the end portion of the slit 46 on the side of the front end face portion 40, thus forming the notch portion forming member. 28 is removed from the precast concrete foundation B.

When the holding member 39 is detachably fitted to the base member 38, when the side mold part 19 is rotated in a direction separating from the other side mold part 20, the side mold part 19 is rotated. Mold part 1
Only the base member 38 fixed to 9 is separated, and the holding member 39 is the precast concrete foundation B.
Therefore, the holding member 39 is to be removed from the rod member 48 along the cutout 46 since it remains with the rod member 48.

Then, while the side mold part 19 is rotated to be separated from the precast concrete foundation B as described above, the side mold parts 15 and 16 are bottomed in a direction in which they are separated from each other, as shown in FIG. Slide the mold part 12 to separate it from the precast concrete foundation B and project the convex part 2
3, the concave portion is formed, and the side mold portion 20 is rotated to be separated from the precast concrete foundation B. Then, the precast concrete foundation B is lifted from above the bottom mold part 12 and carried out.

At this time, the insert member 62 is fixed to the precast concrete foundation B in a state of being embedded, and the recess forming member 51 is fixed to the embedded insert member 62 by the bolt 63.
With respect to these fixing forces, the concave portion forming member 5 made of double-sided tape
Since the adhesive force of 1 to the bottom mold 12 is smaller, the recess forming member 51 is separated from the bottom mold 12 integrally with the precast concrete foundation B while peeling the adhesion to the bottom mold 12. .

In this way, the bolt 63 is released from the precast concrete foundation B separated from the mold 21 by a tool inserted through the through holes 56 and 57, and the bolt 63 is removed. The fixing of the forming member 51 to the precast concrete foundation B is released and then removed.

The precast concrete foundation B manufactured as described above is similar to the first embodiment in that the bar member 4 is used.
8 will be passed between the concrete C on both sides of the notch portion 26, and in addition to this, a concave portion is formed in the surface portion formed by the bottom mold portion 12, and the screw hole 59 is exposed from the concave portion to the outside. The insert member 62 can be embedded in the closed state. Therefore, the recess is formed and the screw hole 5 is formed in the recess at the precast stage, not at the site construction.
The insert member 62 can be embedded with the opening 9 left open.

The side mold part 1 of the rotating type is used for the mold frame 21 of the manufacturing apparatus according to the first and second embodiments.
The side mold part 19 to which the notch forming member 28 is attached is changed to a slide type that horizontally moves with respect to the bottom mold part 12 as shown in FIGS. 14 and 15, or is rotated. Both of the side mold parts 19 and 20 of the type can be changed to a slide type which moves horizontally with respect to the bottom mold part 12, as shown in FIGS. 16 and 17.

[0039]

As described above in detail, the invention according to claim 1 or 4
According to the invention described, both ends of the bar member projected from the notch forming member at the time of placing concrete into the mold will be embedded in the concrete, and when the notch forming member is removed after hardening of the concrete, The notch is formed, and the bar member is passed between the concrete on both sides of the notch along the upper surface of the foundation formed together with the notch. Therefore, the rod member for preventing the invasion of animals or the like can be provided in the ventilation port at the precast stage, not at the site construction.

According to the second or fifth aspect of the invention, when the notch forming member is pulled out in the direction opposite to the forming direction of the cutout after hardening of the concrete, the bar member held in the through hole becomes the elastic member. While being deformed, the relative movement is performed along the cutout and the cutout part is removed from the end of the cutout, so that the notch forming member is removed. Therefore, the notch forming member can be easily removed from the precast concrete foundation.

According to the third aspect of the invention, the insert member held by the recess forming member is embedded in the concrete when the concrete is poured into the mold, and the mold is peeled off after the concrete is hardened. When the recess forming member is removed by removing the screw while the bolt is unscrewed, the recess is formed and the screw hole of the insert member is opened in the recess. Therefore, it is possible to embed the insert member in a state in which the recess is formed and the screw hole is opened in the recess at the precast stage, not at the site construction.

[Brief description of drawings]

FIG. 1 is a plan view showing an apparatus for manufacturing a precast concrete foundation according to a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view in which a part of a notch portion forming member applied to the manufacturing method and the manufacturing apparatus for the precast concrete foundation according to the first embodiment of the present invention is a section.

FIG. 5 is a front view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a cross-sectional view showing the method of manufacturing the precast concrete foundation according to the first embodiment of the present invention in the order of steps.

FIG. 8 is a side sectional view showing an apparatus for manufacturing a precast concrete foundation according to a second embodiment of the present invention, showing a state in which a mold is formed.

FIG. 9 is a sectional side view of the same showing a state in which a side mold part is opened.

FIG. 10 is a front sectional view of the same and shows a state in which a mold is formed.

FIG. 11 is a front cross-sectional view showing the state where the side mold part is opened.

FIG. 12 shows a recess forming member applied to a method for manufacturing a precast concrete foundation according to a second embodiment of the present invention, in which (a) is a plan view, (b) is a front sectional view, and (c) is a front view. ) Is a side view.

FIG. 13 is a front view showing a state where an insert member is fixed to a recess forming member.

FIG. 14 is a side sectional view showing a modified example of the precast concrete foundation manufacturing apparatus, showing a state in which a mold is formed.

FIG. 15 is a sectional view of the same side, showing a state in which a side mold part is opened.

FIG. 16 is a side sectional view showing another modified example of the apparatus for manufacturing a precast concrete foundation, showing a state in which a mold is formed.

FIG. 17 is a sectional side view of the same showing a state in which a side mold part is opened.

[Explanation of symbols]

 17 Surface part 21 Formwork 24 Upper surface 26 Notch part 28 Notch part forming member 39 Holding member (elastic member) 45 Through hole 46 Interruption 48 Bar member 51 Recess forming member 59 Screw hole 62 Insert member 63 Bolt B Precast concrete foundation C concrete

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location F24F 13/068 F24F 13/068 (72) Inventor Haruyasu Ito 8-8 Ishihata, Mizuho-cho, Nishitama-gun, Tokyo 11 Copo Hill Ishihata 206

Claims (5)

[Claims] 1. A manufacturing method for manufacturing a precast concrete foundation in which a notch serving as a ventilation opening is formed on one end surface side serving as the upper surface of the foundation by pouring concrete into a formwork. A cutout forming member for forming the cutout, which can be detachably held in a state where both ends of the member are projected from both sides, is used, and the cutout forming member is used as the base upper surface of the mold. In a state in which the rod member is mounted so as to be along the surface portion for forming, the concrete is placed in the mold, and after the concrete is hardened, the mold and the notch portion forming member are removed. A method for manufacturing a precast concrete foundation, which is characterized by: 2. The notch portion forming member includes a through hole into which the rod member is fitted, and a slit which is pulled out from the through hole in a direction opposite to the surface portion while being arranged in the mold. 2. An elastic member having the same is provided.
A method for manufacturing a precast concrete foundation as described. 3. A manufacturing method for manufacturing a precast concrete foundation having a recess formed on one surface by pouring concrete into a mold, the insert having a screw hole at one end side. A recess forming member for forming the recess, which can be detachably held by a bolt screwed into the screw hole, is used, and the recess forming member is arranged with the insert member on the concrete pouring side. By adhering it to the formwork and placing concrete in the formwork, after hardening of the concrete, the formwork is removed while peeling off the adhesion, and then the screwing of the bolt is released. A method for manufacturing a precast concrete foundation, which comprises removing the recess forming member. 4. A manufacturing apparatus for manufacturing a precast concrete foundation, wherein a cutout portion serving as a ventilation port is formed on one end surface side which is a top surface of the foundation, and an outer surface including the foundation upper surface of the precast concrete foundation is formed. And a bar member for holding the bar member detachably in a state where both ends of the bar member are protruded from both side parts, and the bar member is arranged along a surface part for forming the base upper surface of the frame. A notch portion forming member for forming the notch portion, which is fixed in a state,
An apparatus for manufacturing a precast concrete foundation, comprising: 5. The cutout forming member includes a through hole into which the rod member is fitted, and a cutout through the through hole in the opposite direction to the surface portion while being arranged in the mold. 5. An elastic member having the same is provided.
Manufacturing equipment for the precast concrete foundation described.