JPS6133111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a separator constructed between formworks assembled in a stacked manner on both sides of a concrete casting space, in which the constituent elements extend in the longitudinal direction of the separator. Those that are divided into multiple types along the same line, specifically, have a flat plate-shaped locking part on one end that is interposed and fixed between the mutually abutting end surfaces of the concrete formwork, and on the other end. two joints each having a continuous bar connection portion forming a groove approximately in the shape of a U-shape in cross section; Two connectors each having a female screw hole formed along the length thereof and a pin insertion through hole formed near one end in the longitudinal direction, and male screws that can be screwed into the female screw hole at both ends. The present invention relates to a structure in which the overall length of a joint-type formwork separator consisting of a single rod-shaped intermediate bar can be adjusted.

Conventional separators for concrete formwork of this type are disclosed in, for example, the Utility Application filed in 1973 by the present applicant.
As seen in the specification of No. 53788 (Utility Model Publication No. 52-143836), a single member made of a single piece of material includes a plate-like part and an intermediate part sandwiched between mutually abutting end surfaces of concrete formwork. It consisted of
This product has extremely high mechanical strength such as tensile strength when concrete is placed at regular intervals, is easy to incorporate into formwork, and can resist the concrete placement load and face each other. It is extremely superior in that it is easy to maintain a constant spacing between forms. However, when constructing a concrete wall with a trapezoidal cross section, such as a sand control wall or a breakwater, where the concrete is placed at intervals that are wide at the bottom and narrow at the top, many types of separators with different lengths are used. Not only is it extremely disadvantageous in terms of cost since it has to be manufactured and used, but it is also troublesome to have to select the required length once and for all when assembling the formwork. Therefore, in order to solve these drawbacks, the present applicant has proposed
- As seen in the specification of No. 148385 (Utility Model Publication No. 55-44117), two joints with one end interposed between the mutually contacting surfaces of concrete formwork and the other end protruding toward the concrete pouring position. and an intermediate member for connecting both joints, and
A connection for connection to a plurality of joints spaced apart at a predetermined interval along the longitudinal direction at least at both end positions of an intermediate member made of a strip-shaped plate material and having a reinforcing recessed part in the form of a groove extending along the longitudinal direction. We devised and filed an application for a structure that is divided into an intermediate connection fitting with a pin insertion hole formed therein. However, in the separator of this earlier application, the pin insertion hole of the intermediate connecting fitting must be of a size necessary for insertion of the connecting pin, and the connecting pin has a considerably large diameter because it is necessary to ensure the required breaking strength. Therefore, the pin insertion holes must also have a considerably large diameter, and the spacing between the pin insertion holes must be wide enough to bear the strength applied to the connecting pins. Due to the nature of the holes, it is not possible to form small diameter holes at small pitch intervals, and it is necessary to form large diameter holes at a pitch interval that is equal to or larger than the hole diameter. Therefore, with this structure, adjustment of the overall length of the separator is limited to stepwise adjustment using the hole spacing as the minimum unit, which inevitably causes looseness in the spacing regulation of the opposing formwork, and the finished dimension of the concrete wall. Errors in accuracy were inevitable.

Therefore, an object of the present invention is to further advance this latter structure and provide a length adjustment structure for a joint-type concrete formwork separator that allows stepless length adjustment.

In order to achieve the above object, the length adjustment structure of the joint type concrete formwork separator according to the present invention has two joints as described in detail at the beginning,
In a joint-type concrete formwork separator consisting of three components, including two connectors and a single rod-shaped intermediate bar, the connecting portions of the two joints are spaced at appropriate intervals along their longitudinal direction. By aligning any one of the pin insertion through holes formed in the above with the pin insertion through holes of each of the two connectors and inserting the pin into both holes, the pitch of the pin insertion through holes can be set as a unit. As a result, the overall length of the separator can be adjusted in stages, and by adjusting the screw engagement between the female screw holes of the two connectors and the male screws at both ends of the intermediate bar, the separator can be adjusted over the pitch range of the pin insertion through holes. The feature is that the overall length is adjustable.

According to the length adjustment structure of the joint-type concrete formwork separator according to the present invention having such a characteristic configuration, (a) the above-mentioned configuration is provided for the connection between the U-shaped groove of the joint and the rod-shaped intermediate bar; By using this connector, even though the joint and the rod-shaped intermediate bar are completely different in terms of their configurations, they can be connected securely and easily using pins without any looseness. .

(b) Moreover, by selectively matching one of the plurality of pin insertion through holes formed on the continuous portion side of the joint with the pin insertion hole formed on the connector side, and inserting the pin therein. Through a combination of stepwise length adjustment and length adjustment in a minute range by adjusting the threading allowance of the male thread on the intermediate bar side with the female threaded hole of the connector, the penetration for pin insertion on the joint connecting part side is achieved. The overall length of the separator can be adjusted steplessly within a practical range while making the hole spacing sufficiently large so that problems with the strength of the joint do not pose any problem during use. One type of separator can be used as a separator between molds with different spacings, and can be effectively used in a state where the spacing is reliably regulated without rattling when used at any space between the molds.

(c) Furthermore, by connecting the connector to the connecting part of the joint first, it becomes easier to thread the intermediate bar and adjust the threading distance, so the separator construction work and length adjustment can be done easily. This has resulted in the practical effects of being able to perform the work easily.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, A is a bar that is to be inserted between the abutting end surfaces of vertically adjacent metal box-shaped concrete formworks 5 and 5. It is formed into a flat plate-shaped locking part 1, and the other end is bent into a U-shaped cross section to form a continuous part 2 for a connector 3, which will be described later, which also serves as a reinforcing recess. It is a joint, and the locking part 1 has a hole 1 for connecting to the adjacent formworks 5, 5 formed by punching, and the opposite side wall portions of the connecting part 2 have a through hole for inserting a connecting pin. A plurality of holes 2' are formed along the longitudinal direction of the continuous portion 2 at appropriate intervals. 3 is fitted from above into the reinforcing recess of the connecting part 2 via a head-attached connecting pin 4 which is removably inserted into any one hole 2' among the plurality of holes 2'. This is an intermediate bar end connector. As shown in the figure, the connector 3 has a width approximately equal to the distance between the inner surfaces of the pair of side walls facing each other across the U-shaped groove of the connecting portion 2, and is fitted into the U-shaped groove. In this state, as clearly shown in FIG. 3, both the left and right outer surfaces are in contact with the inner surfaces of the opposing side walls of the U-shaped groove, and the connecting pin 4 is inserted through the U-shaped groove. It has a through hole 4' for this purpose, and a female screw hole 3'' of an appropriate depth is cut along the longitudinal direction of the shaft core on the opposite side of the locking part 1 with respect to the through hole 4'. .

3' is a pair of joints A, A connecting the connectors 3, respectively, and male threads 31, 32 carved at both ends thereof are screwed into the female screw holes 3'', 3'' of the connectors 3, 3, respectively. It is a rod-shaped intermediate bar for connecting to each other by fitting together, and both female screw holes 3'', 3'' in a pair of joints A, A are configured so that one has a right-hand thread and the other has a left-hand thread. .

The separator is constructed by connecting a pair of joints A, A through connectors 3, 3 and an intermediate bar 3'. Inserted between the abutting end surfaces of the side plates 5', 5'..., and connecting holes 1', 1' provided in the locking portions 1, 1 and the adjacent circumferential side plates 5', 5'... With the holes 7, 7... aligned in phase, insert the U-clips 6, 6 into each hole 1', 7, 7... from the common tips 6', 6' at position 8 of the imaginary line in Fig. 5. Insert the clamping pieces 6'', 6'' into the adjacent formworks 5, 5 by rotating them as shown by the arrows.
...The separator is connected to the connected formworks 5, 5, etc. at the same time as the connection of the comrades.

In this state, when the intermediate bar 3' is rotated to the right or left, the joints A, A move toward or away from each other, thereby continuously finely adjusting the overall length of the separator.

Fine adjustments to the separator length can be made before connecting the separator to the opposing formwork. Furthermore, after changing the relative position between the connector 3 and the connecting part 2, selecting an appropriate pair of holes 2' and 2' and connecting them with the pin 4 allows coarse adjustment of the separator length. You can also do it.

Note that there may be only one pair of holes 2', 2' provided in the continuous portion 2.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention.
The figure is a side view, Figure 2 is a plan view, Figure 3 is Figure 1A.
-A sectional view taken along the line B, and FIGS. 4 and 5 are a partially cutaway side view and a plan view of the state of connection to the formwork. 1...Locking part, 2...Connecting part, 3...Connector,
3'...Intermediate bar, 3''...Female screw hole, 4'...Through hole for pin insertion, 5...Concrete formwork, 3
1, 32...male thread, A...joint.

Claims (1)

[Claims] 1 Having a flat plate-shaped locking part 1 interposed and fixed between the mutually abutting end surfaces of the concrete formworks 5, 5 on one end side, and forming a groove with a substantially U-shaped cross section on the other end side. two joints A, A having bar connection connecting portions 2, and a female screw hole 3'' having a width approximately equal to the width of the U-shaped groove of the joint A, and a female screw hole 3'' along the longitudinal direction in the center thereof. are formed, and a through hole 4' for pin insertion is formed at a position near one end in the longitudinal direction.
3, and a single rod-shaped intermediate bar 3' having male threads 31 and 32 formed at both ends, respectively, which can be screwed into the female threaded hole 3'', to adjust the overall length of the joint type formwork separator. The structure can be freely configured with any one of pin insertion through holes 2', 2', etc. formed at appropriate intervals along the longitudinal direction in the connecting portions 2, 2 of the two joints A, A, respectively. The pin insertion through holes 4', 4' of the two connectors 3, 3 are aligned, and both holes 2', 4', 2',
By inserting pins 4, 4 through 4', the entire length of the separator can be adjusted in stages based on the pitch of the pin insertion through-holes 2', 2'...
Also, the female screw hole 3'' of the two connectors 3, 3,
3'' and the screws 31 and 32 at both ends of the intermediate bar 3', the pin insertion through holes 2' and
A separator length adjustment structure for a joint type concrete formwork, characterized in that the entire length of the separator can be adjusted over a pitch range of 2'.