JPH02161071A - Device for clamping form - Google Patents

Abstract

PURPOSE:To facilitate a form assembly and a form overhaul operation by previously incorporating a clamping device and a material supporting the crosspiece of forms into the large-sized concrete forms integrally and forming a frame board unit. CONSTITUTION:A cylindrical body 1 is engaged with the inserting hole 63 of a frame board 6, and a material supporting the crosspiece of forms 7 and a holding member 2 for the material supporting the crosspiece of the forms are fixed to the frame board 6 by a pushing member 3 screwed to a male screw 14. A bar member 4, at one end of which a frame-board abutting member 19 is installed, is penetrated into the cylindrical body 1, and fastened to the frame board 6 by a female screw member 5. A spacer 8 is mounted to a female screw 41 on one frame board unit 10 side, oppositely faced screws 41, 83 on the unit 10 side are connected by turning a tool engaging section 42, and the screw 5 is clamped, thus completing forms. The screw 5 and the screw 41 are loosened and the unit 10 is extruded from a concrete wall surface on overhaul. Accordingly, the forms can be assembled in a short time, and can be overhauled and released easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a formwork tightening device for tightening formwork for constructing concrete walls.

(Prior Art) FIG. 6 shows a formwork assembly structure performed using a conventional formwork tightening device 100Z. According to this conventional formwork assembly structure, a large number of spacers 108, 108, etc. are interposed between the left and right sets of frame plates toe, and each of the left and right frame plates 106, 106 is connected to each spacer 108,
Locking heads 189, 189 provided at both ends of 108...
hook the locking portions 102 of the locking members 101 on the respective
Subsequently, the groove 103 of the locking member 101 is inserted through the butterfly material 107.
By driving a wedge 105 into the frame plate 106, the frame plate 106 is pressed and fixed against a frame plate abutting member 182 provided at the end of the spacer 108.

However, in the formwork assembly structure using the conventional formwork tightening device 100Z shown in FIG.
07, then each spacer 108, 108...
Formwork tightening devices 100Z are placed at corresponding positions on both ends of the
, 100Z, etc., and when disassembling the assembled formwork, each formwork tightening device 100Z, +00Z,...
and after removing the butter material 107, each frame board 10
6, 106 from the formed concrete wall 100A, and the frame plate abutting member 182 embedded in the concrete wall 100A from the concrete wall surface. There is a problem in that the number of man-hours required for each work increases, the work is complicated, and it takes a long time to perform the work.

Furthermore, in the formwork assembly structure using the conventional formwork tightening device shown in FIG. 6, each frame plate 106,
106 from the side of the concrete wall 100A,
Each frame board 10 with each formwork tightening device and butter material removed
6, 106 is removed manually, but when a single frame board 106 with a large area is used, the adhesion area to the concrete wall becomes large, so it is not necessary to remove the frame board manually. Work was sometimes difficult.

(Object of the Invention) In view of the above-mentioned problems of the conventional formwork tightening device, the present invention provides a method for assembling the formwork in a state in which the formwork is assembled integrally with a frame plate, and the frame is temporarily assembled with butter material. To provide a formwork tightening device that enables the formwork to be dismantled or dismantled in the formwork, and that allows the frame plate to be easily peeled off from the side of the concrete wall after forming the concrete wall within the formwork. It was done for a purpose.

(Means for Achieving the Object) The formwork tightening device of the present invention has a cylindrical shape with a hollow interior and an appropriate length, and has one end that engages with the rim on the inner surface side of the frame plate of an insertion hole formed in the frame plate. a cylindrical body having a locking part that can be stopped; a butter material holding member that can hold butter material installed on the outside of the frame plate and is movable along the length direction of the butter material with respect to the cylindrical body; , a pressing member capable of pressing the butter material holding member along the cylindrical body toward the locking portion forming side of the cylindrical body; and a pressing member that abuts the inner surface of the frame plate and has a through hole formed therein. a frame plate abutting member, and a rod-shaped rod inserted into the hollow space of the cylindrical body so as to be rotatable and movable in the longitudinal direction with respect to the cylindrical body, and the frame plate abutting member on one end thereof; can be installed through the through hole, and has a screw at one end that can be screwed into a screw provided at the end of a spacer interposed between both frame plates, and the frame is attached to the outside of the one end at the one end. A frame plate abutting member locking portion is formed to lock the frame plate abutting member so that it cannot come out forward from the one end when the plate abutting member is attached, and the other end is attached to the tube. The shaped body has a length that protrudes further outward from the opposite end where the locking part is formed, and further has a tool locking part for locking a rotary tool at the other end, and a male thread near the other end. a rod-shaped body formed with a cylindrical body, and a male thread of the rod-shaped body is screwed to press the cylindrical body inside the frame plate toward the frame plate abutting member attached to one end of the rod-shaped body. It is characterized in that it is configured with a female screw member that can be screwed.

(Operation and method of use) In the formwork tightening device of the present invention, the formwork tightening device is used twice as many as the number of spacers interposed in the formwork, and the frame plate abutting member of the rod-shaped body is Insert the rod-shaped body into the cylindrical body with the frame plate abutting member attached to the outside of the stop forming side end, and with the rod-shaped body inserted, move the cylindrical body from the inside of the frame plate to the frame plate. Through the formed insertion hole, the locking part of the cylindrical body is locked to the inner edge of the frame plate of the insertion hole, and with the butter material placed on the outside of the frame board, the butter material is placed on the outside of the butter material. A frame plate in which the frame plate, butter material, and formwork tightening device are integrally assembled by applying a holding member and pressing the butter material holding member to the locking portion forming side of the cylindrical body by a pressing member. A unit can be constructed, and when assembling and dismantling the formwork, it becomes possible to handle them (the frame plate, butter material, and formwork tightening device) while they are assembled together (as the frame plate unit). In this state, in the frame plate unit, the frame plate, the butterfly material, the butterfly material holding member, the cylindrical body, and the pressing member are tightly tied together, and the rod-like body is movable in the length direction within the cylindrical body. There is.

Also, when assembling the formwork, with the left and right frame plates as the frame plate unit, screw the screws at one end of the spacer into the screws provided on each rod-shaped body on one of the frame plate units. After the rod-shaped body and the spacer are integrated, the female screw member is rotated in the screwing direction and the frame plate unit is pressed against the frame plate abutting member provided at the end of the rod-shaped body in a state that it cannot be pulled out. Then install the frame plate unit at the concrete wall forming position with each female screw member and each frame plate abutting member firmly tightened, and then attach the other frame plate to the frame plate unit with spacers. With the units facing each other, screw the screws of each rod-shaped body of the frame plate unit into the screws provided at the other end of each spacer, and then rotate the female screw member in the screwing direction to attach the frame plate unit to the rod-shaped body. The assembly of the formwork is completed by pressing against the frame plate abutting member provided at the end to firmly tighten the frame plate unit between each female screw member and each frame plate abutting member.

In addition, when disassembling the formwork after forming a concrete wall between the assembled formworks, after slightly loosening the female threaded member used to press the frame plate unit, insert the rod-shaped body in the direction in which the screw will unscrew. Rotate. Then, the screw of the rod-like body is screwed against the screw on the spacer side, so that the rod-like body moves outward with respect to the spacer, and at this time, the frame plate abutting member is also pushed outward, and the frame plate The entire unit is moved in a direction away from the concrete wall, and is forcibly separated from the sides of the concrete wall formed within both frame plates. At this time, the frame plate abutting member is also peeled off from the side surface of the concrete wall together with the frame plate. Then, after completely unscrewing the screws of all the rod-shaped bodies from the screws of the spacer,
The dismantling operation of the formwork is completed by lifting and removing each frame board unit using a crane or the like.

(Example) To explain the present invention in detail with reference to FIGS. 1 to 5, the formwork tightening device Z of this example has an insertion hole formed in a frame plate 6 and having an appropriate length. A cylindrical body 1 having an outer diameter that can be inserted into the interior of the frame plate 63, and a butter material 7 installed on the outside of the frame plate 6.
A butter material holding member 2 that holds the butter material holding member 2, a pressing member 3 that can press the butter material holding member 2 along the cylindrical body 1 toward one end Ia of the cylindrical body, and a pressing member 3 that contacts the inner surface of the frame plate 6. The frame plate abutting member 9 that comes into contact with the cylindrical body 1, and the rod-shaped body 4 that is inserted into the hollow space 12 of the cylindrical body 1 so as to be rotatable and movable in the longitudinal direction with respect to the cylindrical body 1, will be described later. When the cylindrical body 1 is screwed into the male thread 43 formed on the rod-shaped body 4, the cylindrical body 1 is inserted into the inner end 4a of the rod-shaped body 4 (as described later, it cannot be pulled out from the end 4a). It is configured to include a female screw member 5 that can be pressed against the attached frame plate abutting member 9). The cylindrical body, the butterfly holding member, the pressing member, the rod-shaped body, and the female screw member are each made of steel, and the frame plate contacting member 9 is made of a synthetic resin material (or wood).

The spacer 8 interposed between both frame plates 6.6 is formed by male screws 83.83 formed at both ends of a rod-shaped separator 81 having an appropriate length depending on the interval between the frame plates.

In this example, the cylindrical body l has a length of 140 to 150 m.
It's about m, that's it! The length range from a to about 1/3 of the total length is expanded. In this embodiment, the inner diameter of the expanded tube portion 1c of the cylindrical body 1 is about 12 mm, and the inner diameter of the non-expanded tube portion 1d is about 9 mm. still,
The outer diameter of the enlarged tube portion 1c in the cylindrical body 1 is slightly smaller than the inner diameter (about 16 mm) of the insertion hole 63 formed in the frame plate 6.

An outward flange-shaped locking part 11 is formed at the end 1a of the cylindrical body 1 on the tube expansion side. The outer diameter of this locking portion 11 is larger than the inner diameter of the insertion hole 63 of the frame plate 6, and when the cylindrical body l is inserted into the insertion hole 63, the locking portion 1
1 is secured to the edge of the insertion hole 63 on the inner surface side of the frame plate.

Further, a male thread 14 is formed on the outer surface of the end 1b of the cylindrical body 1 on the opposite side where the locking portion is formed.

Since a round tube is used as the butter material 7 in this embodiment, the butter material holding member 2 has two upper and lower arcuate holding portions 21.21 formed on its inner surface. Further, a hole 22 through which the cylindrical body 1 can be inserted is formed in the center of the butter material holding member 2.

In this embodiment, the pressing member 3 for pressing the butter material holding member 2 is a female screw member that can be screwed into a male screw 14 formed on the cylindrical body l.

Then, this pressing member 3 is rotated in the screwing direction with respect to the male screw 14 of the cylindrical body 1 with the cylindrical body 1 inserted into the hole 22 of the butter material holding member 2. The pressing member 3 can press the butterfly material holding member 2 along the cylindrical body 1 toward the locking portion forming side.

The frame plate abutting member 9 is commonly called a con.
The outer shape is shaped like a truncated cone. This frame plate abutting member 9
A through hole 91 is formed in the center of the frame plate abutting member 9, and a cavity 93 reaching an appropriate depth is formed on the bottom side of the frame plate abutting member 9, leaving a thin peripheral wall 92. The frame plate abutting member 9 is used so that the end surface of the peripheral wall 92 is in contact with the inner surface of the frame plate 6.

The rod-shaped body 4 has a longer length than the cylindrical body 1, and has a female thread 4 at one end 4a that can be screwed into the male thread 83 of the spacer.
I is formed. This rod-shaped body 4 has its male screw 41
The outside diameter of the portion other than the forming portion is a straight rod portion 4c that is slightly smaller than the inside diameter of the non-expanded tube portion 1d of the cylindrical body l, and the outside diameter of the portion where the male thread 41 is formed is the frame plate abutting member 9. The large diameter portion 4d is approximately the same diameter as or slightly smaller than the inner diameter of the through hole 9I. Then, the large diameter portion 4d of this rod-like body 4 is passed through the through hole 91 of the frame plate abutting member 9, and the frame plate abutting member 9 is moved to the outside of the large-diameter portion 4d of the rod-like body in the lengthwise direction of the rod-like body. It can be installed in any way possible. Further, an outward flange 46 having an outer diameter larger than the inner diameter of the through hole 91 of the frame plate abutting member 9 is formed at the female thread forming side end 4a (large diameter section 4d end) of the rod-shaped body 4. There is. This outward flange 46 has a frame plate abutting member 9 attached to the outside of the large diameter portion 4d.
This serves as a locking portion for the frame plate abutting member to prevent it from slipping out from the frame a. Incidentally, an inclined surface portion 4e that tapers toward the entrance of the female screw 43 is formed on the tip end surface of the large diameter portion 4d of the rod-shaped body 4, and the female screw 43 is connected to the separator 8 as described later. This allows for easy alignment when screwing into the male thread 83 of.

A male thread 43 is formed on the other end 4b side of the rod-shaped body 4. Further, a tool locking portion 42 for locking a rotating tool such as a spanner is provided at the tip of the male screw 43. still,
In this embodiment, the tool locking portion 42 is formed by fixing a nut, but in other embodiments, the end of the male screw 43 is directly formed into a square shape, into which a tool such as a box spanner is fitted. You can also get it.

A female screw member 5 for pressing the cylindrical body 1 is screwed into a portion of the rod-shaped body 4 where the male screw 43 is formed. This female screw member 5 is adapted to be rotated using a rotation tool such as a spanner.

This formwork tightening device Z (cylindrical body 11 butter material holding member 2, pressing member 3, frame plate abutting member 9, rod-shaped body 4, and female screw member 5) is assembled to the frame plate 6 as follows. It will be done. First, the male screw forming side end 1b side of the cylindrical body 1 is inserted into the insertion hole 63 of the frame plate 6 from the inner surface side, and the locking part 11 of the cylindrical body 1 is inserted into the frame of the insertion hole 63. Lock it to the edge of the inner surface of the board. Then, apply the two butterfly materials 7.7 to the outer surface of the frame plate 6 so as to sandwich the cylindrical body l from above and below, and then insert the hole 22 of the butterfly material holding member 2 into the male screw forming side end of the cylindrical body l. After fitting to the outside of the cylindrical body 1 from the part 1b side, the male thread 14 of the cylindrical body l is
Screw the pressing member 3 (female screw member) into and tighten it. next,
Before attaching the tool locking part 42 and the female screw member 5 to the rod-shaped body 4, the frame plate abutting member 9 is fitted onto the outside of the rod-shaped body 4 from the male thread forming side end. is attached to the outside of the large-diameter portion 4d of the rod-like body, and insert the male thread forming side end 4b of the rod-like body 4 into the cylindrical body l from the locking portion forming side opening of the cylindrical body l. , male thread forming side end 4 of the rod-shaped body 4
b protrudes outward from the male thread forming side end Ib of the cylindrical body l, and then the female screw member 5 is screwed into the male screw 43 of the rod-shaped body 4, and then a tool is attached to the tip of the male screw 43. The stop portion 42 is fixed. In addition, a large number of insertion holes 63, 63, etc. are formed in the frame plate 6 at appropriate intervals vertically and horizontally, and the formwork is tightened in the same manner as described above in each of these insertion holes 63, 63, etc. Device Z is assembled.

In this way, in the assembled state of the formwork tightening device Z, the locking portion 11 of the cylindrical body l is locked to the inner side opening edge of the frame plate 6 of the insertion hole 63, and the butter material holding member 2 By being pressed by the pressing member 3, the frame plate 6, the butterfly material 7, the butterfly material holding member 2, and the cylindrical body l are firmly fixed, and the frame plate unit 10 in which these members are integrated is formed. Become configurable. In this way, in the assembled state of the formwork tightening device Z, the rod-shaped body 4 is rotatable and movable in the length direction within the cylindrical body l, but the female thread formation of the rod-shaped body 4 A frame plate abutting member 9 is attached to the side so that it cannot be removed, and when the rod-shaped body 4 moves to the outside of the frame plate, the end face of the peripheral wall 92 of the frame plate abutting member 9 is attached to the cylindrical body 1 side. abuts against the inner surface of the frame plate 6 on the outside of the outer periphery of the locking portion 11, and on the other hand, the rod-shaped body 4
A female thread member 5 is provided on the male thread forming side of the cylindrical body 1, and when the rod-shaped body 4 moves inward to the frame plate, the female thread member 5 abuts against the male thread forming side end 1b of the cylindrical body 1. However, the rod-shaped body 4 is prevented from accidentally slipping out from inside the cylindrical body l.

As shown in Fig. 1, this formwork tightening device Z is integrally assembled with a plurality of butter materials 7, 7, etc. on a single large-area frame plate 6, and these are integrated. It is used as a frame plate unit 10. When assembling a formwork for a concrete wall using this pair of frame plate units 10.10, it is carried out as follows. First, spacers 8, 8, . . . are attached to the insertion holes 63 forming portions on the inner surface side of the frame plate 6 of one frame plate unit IO. then,
In one frame plate unit 10 (the left frame plate unit 10 in FIG. 2), each formwork tightening device tightens the female screw member 5 to press the frame plate abutting member 9 against the inner surface of the frame plate 6. Z, Z, . In this state, each spacer 8.8...
They are firmly fixed to the frame plate unit IO in a mutually parallel state, and the tips (ends on the opposite side of the fixed side) of each spacer 8, 8, . . . are positioned at equal intervals vertically and horizontally. Then, this frame plate unit IO with spacers is erected and fixed at a predetermined position where a concrete wall is to be formed, and then the other frame plate unit IO is suspended using a hanging device B (Fig. 1) such as a crane. Lower the existing frame board unit l
0, and the opening on the locking part side of each cylindrical body 1 on the side of the suspended frame plate unit IO is connected to the existing frame plate unit 10.
Fit the ends of each spacer (male thread 83) on the side. At this time, the vertical and horizontal intervals between the tips of the spacers (male threads 83) of the existing frame plate unit IO, and the vertical and horizontal distances between the locking part side openings of each cylindrical body 1 of the opposing frame plate unit IO. Since the spacing is the same, frame board unit 1 on the existing side
If the frame plate unit 10 on the opposite side is pressed against the frame plate unit 10 on the existing side with the frame plate unit 10 on the opposite side accurately facing screw 41
come to face the tips of the spacers 8 at the same time. Next, the tool locking portion 42 of each bar-shaped body 4° 4 on the opposing side is rotated, and the female thread 41 of each bar-shaped body 4 is screwed into the male thread 83 at the tip of the spacer to an appropriate depth. (state shown in Fig. 3), and then tighten each female screw member 5, 5, etc. to tighten the inner surface of the frame plate 6 to each frame plate abutting member 82, 82, etc.
. . , the assembly of both frame plates 6, 6 . . . is completed (state shown in Fig. 4).

After filling the assembled formwork with concrete and constructing a concrete wall, when dismantling the formwork, first loosen the female threaded member 5 and insert a rotating tool into the tool locking part 42. The rod-shaped body 4 is locked and rotated in the direction in which the female screw 41 is unscrewed. Then, the female screw 41 of the rod-shaped body 4 tries to move outward with respect to the male screw 83 on the spacer 8 side, and at this time, the frame plate abutting member 9 is in contact with the inner surface of the frame plate 6, so that the frame The entire board unit 10 is moved outward, and the inner surface of the frame board 6 is forcibly separated from the side surface of the constructed concrete wall A, as shown in FIG. At this time, the frame plate abutting member 9
Since the frame plate abutting member locking portion 46 provided at a prevents it from coming off from the rod-shaped body 4, when the frame plate 6 is peeled off, it is automatically peeled off from the concrete wall A together with the frame plate 6. There is no need to remove the frame plate abutting member from the concrete wall in the subsequent process as in the past. In addition, when dismantling the formwork, even if you try to screw in only a single rod-like body 4 at a time, the frame plate 6 will not bend, making the rotation operation difficult. You need to do it step by step, step by step. Then, if the other frame plate unit IO is similarly removed from the side of the concrete wall A, the dismantling work of the formwork is completed.

In this way, each frame board unit I O, 10 removed from the concrete wall A is moved to the next planned concrete wall formation position without disassembling it, and is then moved to the next concrete wall formation position, where it is removed in the same manner as above. assembled and used.

(Effects of the Invention) In the formwork tightening device of the present invention, the locking portion 11 of the cylindrical body 1 is formed in the frame plate 6 of the insertion hole 63 when the rod-shaped body 4 is assembled to the cylindrical body l. The butter material holding member 2 is applied to the outside of the butter material 7 while the butter material 7 is placed on the outside of the frame plate 6, and the butter material holding member 2 is held by the pressing member 3. By pressing the locking portion forming side of the cylindrical body 1,
A frame board unit 10 can be constructed in which a frame board, butter material, and this formwork tightening device are assembled together, and this frame board unit 10
Since the formwork for constructing a concrete wall can be assembled or dismantled in this state, the formwork can be assembled or dismantled easily and in a short time.

Moreover, if the formwork tightening device of the present invention is used, when the formwork is dismantled, the frame can be tightened by rotating the rod-like body 4 in the direction in which the screws 41 of the rod-shaped body 4 unthread with respect to the screws 83 of the spacer 8. The entire board unit can be forcibly peeled off from the side of the concrete wall. For example, if a single frame board 6 with a large area is used (the adhesive area with the concrete wall becomes large) It has the effect that it can be easily removed from a concrete wall even if it is difficult to remove by hand.

Furthermore, according to the formwork tightening position of the present invention, the frame plate abutting member 9
is provided at the end 4a of the rod-shaped body 4 in such a way that it cannot be removed, so that the frame plate abutting member 9 is attached to the frame plate 6 when the formwork is dismantled (when the frame plate 6 is peeled off from the concrete wall A). The frame plate abutting member 9 is now automatically removed from the concrete wall A, and unlike conventional formwork assembly structures of this type, the frame plate abutting member 9 is removed in a separate process after the frame plate peeling work. This eliminates the need for removal work, which has the effect of shortening this type of formwork dismantling work process.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a method of assembling a formwork using the formwork tightening device according to the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ of FIG. The figures are a state change diagram of FIG. 2, and FIG. 6 is a longitudinal sectional view showing a conventional formwork assembly structure. l...Cylindrical body 2...Butter material holding member 3...Press member 4...Rod-shaped body 4a...One end 4b...Other end 5. ...Female screw member 6 ... Frame board 7 ... Butterfly material 8 ... Spacer 9 ... Frame plate abutting member IO ... Frame board unit +1 ... Locking part 12 ... Hollow space 14 ... Male thread 41 ... Female thread 42 ... Tool locking part 43 ... Male thread 46 ... Frame plate Contact member locking portion 63...Insertion hole 83...Male thread 91...Through hole

Claims (1)

[Claims] 1. It is hollow inside and has a cylindrical shape with an appropriate length, with one end (
1a), a cylindrical body (
1) and the butter material (7) installed on the outside of the frame board (6).
) and is movable along its length with respect to the cylindrical body (1); a pressing member (3) capable of pressing the locking portion forming side of the cylindrical body (1) along the cylindrical body (1), and a through hole (91) that is in contact with the inner surface of the frame plate (6) and formed therein. The frame plate abutting member (9) is inserted into the hollow space (12) of the cylindrical body (1) so as to be rotatable and longitudinally movable with respect to the cylindrical body (1). The frame plate abutting member (9) can be attached to one end (4a) of the rod shape through the through hole (91), and the one end (4a)
) has a screw (41) that can be screwed into a screw (83) provided at the end of a spacer (8) interposed between both frame plates (6, 6).
), and the one end (4a) has a
) for locking the frame plate abutting member (9) so that it cannot slip out forward from the one end (4a) when the frame plate abutting member (9) is attached to the outside of the frame plate abutting member (9). A contact member locking portion (46) is formed, and the other end (4b) side is connected to the cylindrical body (
It has a length that projects further outward from the end (1b) opposite to the locking part forming side of 1), and further has a tool locking part (42) for locking a rotating tool at the other end (4b). and the other end (4
b) a rod-shaped body (4) with a male thread (43) formed on its side;
When screwed into the male thread (43) of the rod-shaped body (4), the rod-shaped body (
4) the frame plate abutting member (4) attached to one end (4a);
82) A formwork tightening device comprising a female screw member (5) that can be pressed toward the side.