JPH0617010B2 - Manufacturing equipment and manufacturing method of precast reinforced concrete beam members. - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus and a method for manufacturing a precast reinforced concrete beam member applied to the construction of a reinforced concrete (or also steel frame) concrete frame structure building.

(Prior Art) Conventionally, a reinforcing bar (or also a steel frame) rigid frame structure building is used at the construction site for reinforcing bars (main bars such as columns and beams, shear reinforcing bars, etc.)
Alternatively, it is common to assemble a steel frame, assemble and enclose a form frame around the assembled rebar (steel frame), pour concrete into the form frame, dry and fix it, and then dismantle the form frame to construct it. However, assembling of steel bars (steel frames), assembling and dismantling of formwork, etc. at the construction site is a dangerous work and requires skill, a lot of time and labor, and due to variations in assembly and arrangement, sufficient construction accuracy is secured. Instead, securing skilled workers and shortening the construction period have become issues.

In consideration of the actual situation as described above, the precast cast reinforced concrete beam member manufactured in advance in a factory or the like is carried into the construction site,
A construction method is proposed in which the end of the beam member is erected on the pillar head, and concrete is placed on the pillar part and the beam member to integrally construct the pillar and the beam, reducing the muscles of the formwork, etc. In addition to labor saving and construction efficiency, product accuracy is improved and cost reduction is possible.

Further, in the conventional example of the precast reinforced concrete beam member, for example, many ribs are fixed in parallel to the inner surface of the U-shaped concrete beam main body in parallel, and the beam upper and lower main bars are fixed to the rib group together with the column. Beams are constructed continuously.

(Problems to be solved by the invention) The precast cast reinforced concrete beam member reduces the weight as much as possible in order to improve workability such as loading to a construction site and erection between pillar heads, and deformation during concrete placement. ,
The beam shear strength required to prevent breakage is required, and the main part of the concrete beam with a U-shaped cross section is made as thin as possible to make it lighter, and many ribs and beam bottom main bars are accurately placed in the thin concrete. It is necessary to increase the strength by burying it in a streak, and to cope with various beam sizes, which requires a lot of labor and time for manufacturing, and there is a problem that the product accuracy tends to vary and the cost increases. , The development of the manufacturing apparatus is desired.

The present invention has been developed in view of the above-mentioned actual situation, and simplifies the apparatus, improves manufacturing performance, and adapts to various beam sizes, as well as back muscle performance of each muscle and embedding in concrete. Precision The manufacturing equipment and manufacturing method of precast concrete reinforced concrete beam members that improve the performance of forming concave parts on the inner surface mainly of concrete beams, reduce the production efficiency and lighten the product, ensure the beam shear strength and accuracy, and enable cost reduction. To provide.

(Means for Solving the Problems) The present invention provides various types of rib-frame fixing frames with underframes, in which a number of rib-insertion fixing grooves are juxtaposed and arranged substantially in parallel and horizontally at the same height. Easily adjust the correspondence to the rib size,
Placement of ribs and beam bottom main bars, fixing performance, and bar arrangement accuracy have been improved, and the concrete wall thickness for various beam sizes has been improved by arranging the inner and outer frames with uneven sheet inside and outside the rib group and beam bottom main bars. It is easy to adjust the thickness of the concrete to secure the required thickness of concrete on the inside and outside of each bar, and to improve the performance of forming concave parts on the inner surface of the concrete beam, and to fix the outer frame, the rib frame fixing frame, and the inner frame with uneven sheet. Further, by placing concrete on the upper part of each bar, many ribs and main bars at the lower end of the beam are embedded to reduce the weight, and a precast reinforced concrete beam member having a U-shaped cross section with increased body beam shear strength is manufactured.

(Operation) When the ribs are inserted into the respective insertion fixing grooves of the pair of underframe-attached rib reinforcement frames that are installed in parallel and horizontally at substantially the same height, the ribs are easily inserted at predetermined intervals and accurately. It is fixed and becomes a parallel rib group, and by adjusting the interval of the same rib fixing frame, it is possible to correspond to the rib width of various sizes, and a plurality of beam lower end main bars are bound to the upper part of the rib group and parallel by means such as welding. Stick to and arrange.

Insert the inner frame with the concave-convex sheet from the front side of the rib group and adjust by fixing the required placing interval of concrete on the inside of each rebar and fix it, and the outer frame with the underframe on the outer side of each rebar Adjust and arrange the required casting interval of and arrange and fix.

Between the outer frame and the rib frame fixing frame and the uneven sheet, concrete is placed on the upper side of each line, and after the concrete is dried and fixed, the outer frame and the inner frame with the uneven sheet are removed, and the product is taken out of the device and turned upside down. In this arrangement, many ribs and main ribs at the lower end of the beam are embedded in the main body of the concrete beam having a U-shaped cross section in an accurate arrangement, and the desired uniform concrete wall thickness is secured on the inside and outside of each rib. A precast reinforced concrete beam member corresponding to a desired beam size can be obtained in which the upper part of the streak is exposed in a predetermined range, a large number of recesses are beautifully formed on the inner surface of the concrete beam main body.

(Embodiment) FIG. 1 and FIG. 2 show a first embodiment of the present invention, in which 1 is a rib frame fixing frame with an underframe 3, 6 is an uneven sheet in which many convex portions 6a are arranged, Reference numeral 7 is an inner frame, 8a is an outer frame with an underframe 9, and 8b is a small frame which is a part of the outer frame. A large number of insertion fixing grooves 2 are arranged side by side inside the rib fixing frame 1 as shown in the drawing. And a pair of underframe 3 fixed ribs 1 with underframes 3 that are provided in parallel with each other and have a large number of insertion fixing grooves 2 arranged side by side, and the ribs fixing frame 1,
The inner frame 7 with the concavo-convex sheet 6 that is placed at intervals of placing concrete 23 inside the ribs 21 group that are inserted and fixed in 1 and the beam bottom main bar 22 that is laid out, and the concrete outside the ribs 21 group Outer frame 8 with underframe 9 arranged at 23 casting intervals
It is a manufacturing device of precast reinforced concrete beam members equipped with a and small frame 8b.

The rib fixing frame 1 with the underframe 3 can be detachably fixed to a foundation or the like as shown by suitable means such as bolts and nuts, and is almost parallel and horizontal at intervals corresponding to the width of various ribs 21. It is fixed at a position opposite to the above, and a number of ribbed support frames 11 with fitting grooves 12 are additionally provided on the lower side at appropriate intervals.

As shown in FIG. 2, the uneven sheet 6 has many convex portions 6a.
Is arranged on the outer surface of each inner frame 7 formed by dividing into a plurality of parts, and each inner frame 7 is The ribs 21 are inserted from the front side, and the ribs 21
The group 23 is arranged inside the beam lower end main bar 22 with a required placing interval of the concrete 23, and supports both the rib structure fixing frames 1 and 1, the curing muscle 22a, and the contact and support of the convex portion 6a to the beam lower end bar 22. Member 1
The mounting interval is secured by the support of 4 and 14, and the interval can be adjusted by an appropriate means such as a spacer.

As shown in FIGS. 1 and 2, the outer frame 8a is detachably arranged and fixed to the rib frame fixing frame 1 with the underframe 3 such as a foundation by appropriate means such as bolts and nuts, and is attached to the outside of the rib group. The concrete is placed and fixed at a required casting interval, and the interval can be adjusted by an appropriate means such as a spacer.

Further, at the end portions of the inner frame 7 with the uneven sheet 6 and the outer frame 8a, a forehead frame 8b as shown in FIG. 1 is detachably arranged by an appropriate means and functions as a part of the fixed outer frame. To be done.

The manufacturing apparatus of the first embodiment is configured as described above, and a pair of the rib fixing frames 1 and 1 with the underframe 3 are made to correspond to the width of the rib 21 so that the ribs are aligned in parallel and at the same horizontal level. The ribs 21 are installed and fixed in the insertion fixing grooves 2 and 2 of both the rib fixing frames 1 and 1, respectively.
, The respective ribs are fixed in the insertion fixing groove in an inserted state, and the lower portion thereof is fitted into the fitting groove 12 of the lower rib supporting frame 11,
Supported, each rib 21 becomes a group of ribs aligned and fixed in parallel at a predetermined interval.

Next, after inserting a plurality of beam lower end hand muscles 22 on both sides inside the upper part of the rib group and fixing them by means of binding, welding or the like and arranging them, the inner frame 7 with the uneven sheet 6 is placed from the front of the rib group. The ribs 6 are inserted and supported by the inner portions of the rib structure fixing frames 1 and 1, a plurality of supporting members 14 are arranged, and appropriate means are provided as necessary to form the concave-convex sheet 6 on the inner side of each of the muscles 21 and 22 as required. Secure and secure the installation interval, and place the outer frame 8a with the underframe 9 on the outside of the rib 21 group with the required placement interval of concrete and fix it by appropriate means, and appropriately install the forehead frame 8b at both ends. Place it and fix it as a part of the outer frame, and place concrete 23 between the outer frame 8a (edge frame 8b), rib fixing frame 1, uneven sheet 6 and the upper part of each line 21, 22, 22b. To do.

After drying and fixing the concrete, the outer frame, the edge frame, the uneven sheet, and the inner frame are removed, and the product is lifted upside down to obtain a precast reinforced concrete beam member.

Also, as shown in FIG. 2, an appropriate curative muscle is placed inside the rib group.
22a is fixed and reinforced by an appropriate means, the convex portion 6b of the concave-convex sheet is provided on the upper portion of the inner frame 7, and the convex portion 6b forms the vertical groove 15 on the inner surface of the bottom of the concrete beam main body 23a of the product. Each convex portion 6a of the sheet 6 forms a large number of concave portions 16 cleanly over the entire inner surface of the concrete beam main body 23a.

A second embodiment is shown in FIG. 3, and in comparison with the first embodiment, three beam lower end main bars 22 are arranged on both upper sides of the rib group 21 and convex portions 7a are provided on the upper part of the inner frame 7. The precast cast reinforced concrete shown in FIG. 4 is characterized in that a vertical groove 15a is provided in the central portion of the bottom inner surface of the concrete beam main body 23a, and other configurations are basically similar to those of the first embodiment. Beam member
You get 20.

The manufacturing apparatus comprises a pair of underframe-fixed ribs fixing frame 1, an inner frame 7 with an uneven sheet, and an outer frame 8a including an edge frame 8b,
The structure is simplified, and the space between the rib fixing frames 1 and 1 and the space between the inner frame 7 with the concave-convex sheet and the outer frame 8a for the respective ribs 21 and 22 are adjusted so that the product size is compatible with each beam size. And can be manufactured easily, easily and efficiently.

Each rib 21 into each insertion-fixing groove 2, 2 of both rib-reinfixing frames 1, 1 fixed and arranged at a desired interval in parallel and horizontally at the same height
It is easy to insert and dispose of without being disturbed by the inner and outer frames 7, 8a, 8b.
The arrangement of the uneven sheet 6 and the inner frame 7 can be quickly adjusted from the underframes 3 and 9 and between the lines, and the outer frame 8a and the edge frame
The arrangement of 8b is also easily performed, and the intervals between the inner and outer frames with respect to each of the streaks 21 and 22, that is, the interval for placing concrete is freely secured to a desired value, and the placing of concrete is performed from the upper opening. It can be easily done without causing any particular deviation in the embedding position of each streak, and the driving thickness of the important beam bottom part, that is, the upper part in the figure is secured to a desired value, and the uneven sheet 6 arranged inside makes the cement Is prevented from being washed away, and a large number of recesses 16 are formed beautifully on the entire inner surface side, the weight of the concrete is reduced and the integration with the cast concrete at the time of constructing the beam is enhanced.

As shown in FIG. 5, the precast cast reinforced concrete beam members 20 are horizontally arranged by erection of the ends on the column heads 40, and the spiral bars 41b between the jumping bars 22b and 22b of the beam bottom main bars 22 that are prematurely retracted at the column heads. Etc., and the vertical grooves 15a, 15a provided in the central portion of the inner surface of the bottom of the beam member, and the bar heads 40 are arranged through the beam bottom main bar 42. Through the main reinforcement, arrange the underfloor slab 45, the connecting reinforcement 46, the floor main reinforcement 47, etc. as shown in the figure. The pillars, the beams and the floor are integrally and continuously constructed, and the weight and weight of the beam members are improved, the shear strength of the beams is improved, and the recesses are formed, so that the construction can be effectively and efficiently performed.

(Advantages of the Invention) The present invention has the above-described configuration, and a pair of underframe fixing rib frames with adjustable underlaying positions and juxtaposed insertion fixing grooves, and an uneven sheet. It is a manufacturing device consisting of an inner frame and an outer frame, which has a simplified mechanism and is compatible with each beam size. Many ribs, the bar arrangement performance of the beam bottom main bar, and the arrangement of the inner and outer frames. Manufacturing performance such as performance is improved, excellent embedding of each bar, concrete pouring, forming performance of inner surface recess, etc., products with high beam shear strength and precision are efficiently manufactured, labor saving At the same time, it is possible to obtain effects such as being provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of the first embodiment of the present invention when arranging bars, FIG. 2 is a front view of the same when pouring concrete, and FIG. 3 is a front view of concrete pouring of the second embodiment. FIG. 4 is a perspective view of a product, and FIG. 5 is a perspective view showing a state of application to a building. 1 ... Rib bar fixing frame, 2 ... Insertion fixing groove 3 ... Stand frame, 6 ... Uneven sheet 7 ... Inner frame, 8a ... Outer frame 8b ... Small frame (outer frame), 9 ... Stand Frame 21 …… Castor, 22 …… Main bar of beam bottom

Claims (2)

[Claims] 1. A pair of undercarriage fixing frames with an underframe, in which a number of inserting and fixing grooves for ribs are juxtaposed and installed in parallel and horizontally at the same height, and ribs inserted and fixed in the costening ribs. Inner frame with concave-convex sheet that is placed inside the reinforcement group and the bottom main bar of the beam to be placed with a concrete placement interval, and outside with a frame that is placed outside the rib group with a concrete placement interval An apparatus for manufacturing a precast reinforced concrete beam member, characterized by comprising a frame. 2. A group of costal muscles, which are parallel ribs inserted into and fixed to the respective insertion fixing grooves of a pair of framed rib fixing frames with an underframe, which are arranged substantially parallel and horizontally at the same height. The main bar of the beam lower end is laid on the upper part of the, and the inner frame with the uneven sheet is placed inside the rib group and the main bar of the beam lower end with an interval of placing concrete.
A precast for placing concrete on the outside of the rib group by placing an outer frame with an underframe and placing concrete between the outer frame and the rib fixing frame and the concavo-convex sheet and on the upper part of each streak. Manufacturing method of reinforced concrete beam members.