JPH0796215B2 - Formwork for the production of concrete segments - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a mold for producing a concrete segment used for a tunnel or the like by a shield construction method.

[Prior art]

Conventionally, this type of manufacturing form is generally one in which both side forms and end plate forms are set on the bottom form during manufacturing, and each form is removed from the bottom form after manufacturing. Are known.

[Problems to be Solved by the Invention]

However, the work of setting each mold on the bottom mold and the work of demolding each mold after manufacturing and removing it from the bottom mold are troublesome and time-consuming. Therefore, there is a problem that the manufacturing work efficiency of the concrete segment is reduced.

The present invention was created in view of the above-mentioned circumstances, and an object thereof is to efficiently perform molding work without the need to set each mold on the bottom mold and to remove it from the bottom mold. The purpose of the present invention is to provide a formwork for producing a concrete segment that can be manufactured.

[Means for Solving the Problems]

According to the present invention, the width fixing device for the both-side molds that sets the both-side molds on the bottom mold at a predetermined position while connecting the both-side molds set on the bottom plate by both screw bolts at both ends thereof. Is provided on the bottom formwork,
Form a formwork for the production of concrete segments. Further, the end plate molds provided at both ends of the both-side molds are pivotally attached to both the screw bolts, and the contact surfaces of the both-side molds and the both-end plate molds and the bottom mold are prevented from trowel. Tape will be provided.

Then, by using both screw bolts and the width fixing device, setting the both side molds to the manufacturing position without removing them from the bottom mold,
Enables demolding after manufacturing. Further, by rotating the both-end plate form around both screw bolts, setting at the manufacturing position and demolding after manufacturing can be performed without removing from the bottom form.

〔Example〕

 The present invention will be described below with reference to illustrated embodiments.

In the manufacturing form 1, both side forms 3 and 3 set on the bottom form 2 are connected by both screw bolts 4 at both ends in the longitudinal direction thereof, and both side forms 3 and 3 are placed at a predetermined position at the bottom. A width fixing device 21 for both side molds 3 and 3 to be set on the mold 2 is provided below the bottom mold 2. (See FIG. 1 to FIG. 3) And end plate formwork 5 provided at both ends of both-sided formwork 3, 3.
Are pivotally attached to both screw bolts 4.

Further, the end plate form up / down adjusting unit 6 is provided at both end plate forms 5, 5 on the lower surface of the bottom form 2, and the both end plate form up / down adjusting units 6,
Form bottom up and down adjusters 7 are provided at four corner positions at the center of the bottom surface of the bottom formwork 2 between the six.

Further, a trolley-prevention tape 20 is provided on the contact surfaces of the two-sided molds 3 and 3, both end plate molds 5 and 5, and the bottom mold 2. The trolley-preventing tape 20 is composed of a sponge-like main body tape 20a and an adhesive tape 20b as shown in FIG.
Is a two-layer structure.

Both screw bolts 4 are screwed into plate bodies 8 on which both side molds 3 and 3 project from both end surfaces in the longitudinal direction. Further, reference numeral 9 is a tie rod receiver provided on the upper end surfaces of the both side molds 3 and 3 in the longitudinal direction thereof and on which the width determining tie rods 10 are bridged. Reference numeral 22 is the bottom formwork 2.
It is a clip-shaped stopper of the mold 3 on both sides.

The width fixing device 21 (see FIG. 3) is provided on the lower surface of the bottom formwork 2 so as to extend in the width direction thereof, and has a shaft 11 having threaded portions 11a at both ends, and a screw of the shaft 11. The side mold support portion 14 provided in the portion 11a and having the through hole 12 through which the screw portion 11a penetrates and the contact portions 13 for the both side molds 3 and 3, and the side mold support portion 14 at a predetermined position. Stopper 15 fixed with
The stopper 15 includes a tightening nut 16 for tightening and fixing the side frame support portion 14. Then, by tightening the tightening nut 16, the abutment portion 13 of the side frame support portion 14
Can be brought into contact with the molds 3 on both sides.

The up-and-down adjusters 6 and 7 (see FIG. 2) are a mold support 17 provided on the bottom surface of the bottom mold 2, a base 18 provided on the installation surface of the manufacturing mold 1, and a mold. Both screw bolts 19 are provided between the supporting base 17 and the base 18 so as to be screwed together.

In manufacturing a concrete segment using the manufacturing mold 1 having such a configuration, first, both screw bolts 19 of the vertical adjustment units 6 and 7 are rotated to vertically move each part of the bottom mold 2. As a result, the bottom formwork 2 is set corresponding to the curved surface of the concrete segment.

Next, the both-end plate molds 5 and 5 are set between the both-side molds 3 and 3 in a state where the spaces are opened, and the both ends of the both-side molds 3 and 3 are fixed to the both-end plate molds 5 and 5 by the screw bolts 4. Tighten it so that it is clamped.

Next, by the width fixing device 21 and the width determination tie rod 10,
Positioning of the central portions of the two-sided molds 3 and 3 is performed. This positioning is performed by abutting the abutment portion 13 of the side frame support portion 14 on the side frame 3 and bridging the width determining tie rod 10 on the tie rod receiver 9.

When the two sided molds 3 and 3 and both end plate molds 5 and 5 have been set in this manner, concrete is poured into the space surrounded by the respective molds. At this time, it is necessary to surely prevent concrete from leaking by the trolley-preventing tape 20 provided on the contact surfaces of the bottom mold 2 and the both-side molds 3, 3 and both end plate molds 5, 5. You can

After that, when the cast concrete is solidified, the width determining tie rod 10 is removed, and the abutment support 13 of the side form support portion 14 of the width fixing device 21 on both side molds 3 and 3 is released. In addition, by using both screw bolts 4, both side molds 3, 3
The left and right sides of the bottom mold 2 are opened and expanded, and the two end plate molds 5 and 5 are removed so that each mold 3,
Demolding of 3, 5, and 5 is completed.

In this way, the production of the concrete segment by the production mold 1 is completed.

FIG. 5 shows another embodiment of the manufacturing mold 1 of the present invention.

In this embodiment, both end plate frames 5 and 5 are axially attached to both screw bolts 4.

In the demolding in this embodiment, the space between the both side molds 3 and 3 is widened by opening both sides on the bottom formwork 2 with the both screw bolts 4 and the both end plate formwork 5 and 5 with the both screw bolts 4 90. Rotate by °.

In addition, the through holes for both the screw bolts 4 of the side form 3 through which the both screw bolts 4 are formed are formed in a slotted cross section so that the end plate form 5 is exposed to the outside so that the end plate form 5 can rotate. Rotate.

[Effects of the Invention] In the mold for producing a concrete segment of the present invention, both side molds set on the bottom formwork are connected at both longitudinal ends by both screw bolts, and the both side molds are set at predetermined positions. In the above, the width fixing device for the side molds set on the bottom mold is provided on the bottom mold.

Further, according to this configuration, without removing both side molds from the bottom mold, it is possible to open and expand left and right on the bottom mold by the action of both screw bolts, and the mold can be released.

On the contrary, in order to set the both-side molds to the manufacturing position, it is possible to surely set them to the predetermined positions by the width fixing device even when the two-sided molds are closed on the bottom mold 2 by the action of the screw bolts.

For these reasons, the concrete segment can be easily and efficiently manufactured without removing the molds on both sides from the bottom mold.

The mold for producing a concrete segment of the present invention is characterized in that end plate molds provided at both ends of both-side molds are pivotally attached to both screw bolts.

According to this structure, the end plate form can be easily removed from the bottom form by simply rotating the end plate form without removing it from the bottom form.

The concrete segment manufacturing formwork according to the present invention has end plate formwork vertical adjustment parts at both end plate formwork positions on the bottom face of the bottom formwork, and the bottom formwork bottom surface central part between the both end plate formwork vertical adjustment parts. It is characterized in that each of the four vertical corners is provided with a vertical adjustment unit for the mold.

With this configuration, it is possible to easily and efficiently secure the curved surface at the installation position of the bottom mold.

The mold for producing a concrete segment of the present invention is characterized in that a trolley-preventing tape is provided on the contact surfaces of the double-sided mold and the both-end plate mold and the bottom mold.

With this configuration, it is possible to reliably prevent the pouring concrete from leaking from the inside of the formwork.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mold for producing a concrete segment of the present invention, FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. 3 is an enlarged sectional view taken along line BB of FIG. FIG. 4 is a perspective view showing a trowel prevention tape, and FIG. 5 is a perspective view showing another embodiment of the concrete segment manufacturing form of the present invention. 1 ... manufacturing formwork, 2 ... bottom formwork, 3 ... side formwork, 4 ...
… Both screw bolts, 5 …… End plate formwork, 6 …… End plate formwork vertical adjustment unit, 7… Formwork vertical adjustment unit, 8 …… Plate, 9 …… Tie rod receiver, 10 …… Width determination Tie rod, 11 …… Axis, 11
a …… screw part, 12 …… through hole, 13 …… contact part, 14 …… side formwork support part, 15 …… stopper, 16 …… tightening nut, 17 …… formwork support base, 18… … Base, 19 …… Both screw bolts, 20… Tromole prevention tape, 20a… Main body tape, 20b… Adhesive tape, 21… Width fixing device, 22… Stopper.

Claims (1)

[Claims] 1. A double-sided mold set on a bottom formwork is connected at both longitudinal ends thereof by both screw bolts, and end plate molds provided at both ends of the both-side formwork are provided at both screw bolts. A width fixing device for the both-sides molds, which is pivotally mounted and sets the both-sides molds on the bottom molds at predetermined positions, is provided on the bottom molds, and both end plate molds on the lower surface of the bottom molds are provided. An end plate form up-down adjusting part is provided at the position, and a form up-down adjusting part is provided at each of four corner positions in the center of the bottom form bottom surface between the both end plate form up-down adjusting parts. A formwork for producing a concrete segment, characterized in that a trolley-prevention tape is provided on the contact surfaces of the formwork and both end plate formwork and the bottom formwork.