JP2001315111A - Fixture used for concrete shuttering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a core mold and the like which are built in a concrete shuttering can be fixed by one touch. SOLUTION: A holder 16 guiding, in a freely slidable manner, the core mold 4 is provided to the concrete shuttering, and a threaded rod 18 is screwed to the holder 16. A globular body 17 energized by a spring 20 is incorporated into the threaded rod 18, and when the core mold 4 is detached or attached along the holder 16, the core mold 4 is prevented from slipping out by engagement of a recessed groove 21 formed to the core mold 4 with the globular body 17. Thereby, the core mold 4 is fixed to be positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture used for a concrete formwork for fixing, for example, a side frame of a concrete formwork for molding a concrete block or a core form assembled to the concrete formwork.

[0002]

2. Description of the Related Art Conventionally, a concrete formwork for forming a concrete block or the like has a bottom frame and a side frame rotatably supported on the periphery of the bottom frame. Adjacent side frames are connected to form a mold having a predetermined shape. As means for fixing the side frame in such a concrete formwork, a rotatable clamp is provided on the side frame, and this is locked to a metal fitting of an adjacent formwork and fixed with a bolt or the like. For this reason, when clamping the concrete formwork, it is necessary to lock the clamp to the metal fitting of the adjacent formwork with the heavy side frame standing up, and hold the clamp while holding the side frame upright. The locking operation is extremely complicated, and it is difficult for one worker to perform these operations. For this reason, since a plurality of people work, the work efficiency is poor. Also, when molding a concrete product having a hollow shape or a concave portion having a through hole as a shape of the concrete product to be molded with the concrete formwork, a detachable core mold is incorporated inside the concrete formwork. When a core mold is incorporated into a concrete form, the most common method has been to screw a fastening bolt into a screw hole formed in the core mold and fix it. The method of fixing the core mold with such a tightening bolt is inefficient because it is necessary to turn the tightening bolt using a tool every time the core mold is attached or detached.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a concrete formwork which can simplify fixing work of a core form incorporated in a side form of a concrete formwork or a concrete formwork and can be fixed with one touch. An object of the present invention is to provide a fixture for use in a vehicle.

[0004]

According to a first aspect of the present invention, there is provided a fixture for use in a concrete formwork, wherein the fixture is configured to fix a side frame of the concrete formwork or an assembling component detachably mounted on the concrete formwork. The fixing tool includes an engagement projection that engages with an engagement receiving portion formed on the side frame or the assembled component, and a holding metal fitting that holds the engaging projection so that the engagement projection can be retracted is provided. An urging means for projecting the engaging projection is provided.

[0005] With the above structure, when the side frame of the concrete form is clamped or the built-in part is fixed to the concrete form, the engagement receiving portion formed on the side frame or the built-in part is incorporated into the holding fitting. Engage the stop projection. Accordingly, when fixing the side frames of the concrete formwork, the side frames of the adjacent concrete formwork are connected to each other, and the side frames of the concrete formwork are clamped. Further, when assembling parts such as a core mold in a concrete formwork, the assembling parts are positioned and fixed by fixtures.

According to a second aspect of the present invention, there is provided a fixture for use in a concrete form according to the first aspect of the present invention, wherein: The concrete form is provided with guide means for slidably guiding the core mold, and the guide means is provided with the holding bracket. Accordingly, when the core mold is assembled, when the core mold or the shaft is slid along the guide member, the engagement protrusion engages with the engagement receiving portion in conjunction with the sliding movement.

According to a third aspect of the present invention, there is provided a fixing tool used for a concrete formwork, wherein the engaging receiving portion is formed on one of the adjacent concrete forms and adjacent to the other. The fixing tool is provided on the other concrete formwork. Thereby, the engagement protrusion engages with the engagement receiving portion in conjunction with the opening / closing operation of the concrete formwork, and the mold is clamped.

According to a fourth aspect of the present invention, there is provided a fixing tool used for a concrete formwork, wherein the assembled component is magnetically attracted to an inner surface of the concrete formwork. It is a curved member that forms a concave portion in a formwork, and the fixing member is provided at a mounting portion of the curved member. Accordingly, when the bending member is magnetically attracted and attached to the inner surface of the concrete form, the bending member can be accurately positioned by the fixing tool.

According to a fifth aspect of the present invention, there is provided a fixing tool for use in a concrete formwork according to any one of the first to third aspects, wherein the engaging projection is engaged with an engagement receiving portion. Operation means for canceling the combination is provided. Thus, when the engagement between the engagement receiving portion and the locking projection is released, the locking projection must be pushed back into the holding fitting against the urging force of the urging means. The engagement between the engagement receiving portion and the locking projection can be released.

[0010] The fixing tool used for the concrete formwork according to claim 6 is a fixation means for fixing a side frame of the concrete formwork or an assembled part detachably mounted on the concrete formwork, wherein the fixing means is a holding means. The metal fitting is provided with a locking piece that elastically locks with an engagement receiving portion formed on the side frame or the assembled part.

According to the above configuration, when the mold of the concrete form is clamped, the side frames of the concrete form are connected to each other by engaging with the engagement receiving portion and the locking piece incorporated in the holding fitting. Further, when fixing the assembled component, the assembled component is positioned and fixed by the locking piece.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a concrete mold, and a fixed core 3 is fixed to a bottom frame 2 of the concrete mold 1. Further, a core mold 4 which is detachably connected to the fixed core mold 3 as an assembly component is provided inside the concrete form 1. The fixed core mold 3 is fixed to the bottom frame 2 by bolts 5 and forms a recess 6 in a concrete product K formed by the concrete mold 1, while the core mold 4 is formed of the concrete mold. Side frame 2 of frame 1
A through the through hole 7 formed in the fixed core 3
The hollow 9 is formed to be in communication with the recess 6 by engaging with the recess 6. The shape of the core mold 4 is formed in a shaft shape, but is formed in a tapered shape such that the front end side is slightly tapered. In addition, core type 4
A step portion 10 having a small diameter is formed on the distal end side, and the step portion 10 is engaged with a fitting receiving portion 11 formed on the fixed core 3.

Reference numeral 13 denotes a support frame fixed to the outside of the side frame 2A, and a fixture 15 of the core mold 4 is fixed to the support frame 13 via a pair of right and left mounting stays 14. The fixing tool 15 includes a cylindrical holder 16 as a guide means for slidably guiding the core mold 4,
The spherical body 17 is an engagement projection assembled to the sphere 17 and a screw rod 18 as a holder for the spherical body 17. FIG. 3 shows the screw rod 18.
The sphere 17 is incorporated inside the screw rod 18 so as to be freely retractable, and partially projects from the screw rod 18 by a coil spring 20 as a biasing means incorporated inside the screw rod 18. I have. Then, by screwing the screw rod 18 into the holder 16, the sphere 17 incorporated in the screw rod 18 is projected from the inner peripheral surface of the holder 16. The screw rod 18 screwed to the holder 16 in this manner is positioned by the nut 19. As a result, the sphere 17 incorporated in the screw rod 18
Protrudes from the inner peripheral surface of the holder 16 and engages the spherical body 17 with a concave groove 21 as an engagement receiving portion formed on the peripheral surface of the core mold 4 to position and fix the core mold 4. .

Reference numeral 23 denotes a rotating operation plate rotatably supported on the mounting stay 14, and a lower end edge of the rotating operation plate 23 is associated with a flange portion 25 fixed to an end of the core mold 4. Groove to fit
26 is formed, and a handle 27 as operating means is integrally fixed to a front upper portion of the rotating operation plate 23.

Reference numeral 30 denotes a holding frame fixed to the outside of the through hole 7 formed in the side frame 2A, and a packing 31 that is brought into close contact with the outer peripheral surface of the core mold 4 is attached to the holding frame 30. A bolt 32 is screwed to the core 4 outside the concrete form 1, and the bolt 32 functions as a stopper when the core 4 slides.

The operation of the present embodiment configured as described above
The effect will be described. After clamping the concrete form 1, the core 4 is connected to the fixed core 3. Core type 4
Is the concrete form 1 from outside the concrete form 1.
The fixed core 3 is detachably connected by being inserted into the inside. The core 4 is slidably guided by a holder 16 fixed to the concrete form 1. At this time, the sphere 17 of the screw rod 18 screwed to the holder 16 abuts on the outer peripheral surface of the core mold 4 inserted into the holder 16, and the sphere 17 is
It is submerged inside 18. Then, in order to connect the core 4 to the fixed core 3, the core 4 is manually pushed out along the holder 16 attached to the support frame 3. As a result, the flange portion 25 of the extruded core 4 is rotated by the rotating operation plate.
The handle 27 engaging with the flange 25 is pushed by the core mold 4 and rotated by abutting against the groove 26 formed in the core 23 and pushing out the core mold 4 from this state. When the core 4 is pushed out until the bolt 5 screwed to the core 4 hits the holding frame 30 in which the packing 31 is incorporated, the step 10 formed at the tip of the core 4 is fixed. Is fitted into the engagement recess 11 formed at the bottom. At the same time, the position of the sphere 17 incorporated in the screw rod 18 and the position of the concave groove 21 formed in the core mold 4 match,
The sphere 17 is returned by the coil spring 20, and the sphere 17 and the groove 21
The core mold 4 is prevented from coming off by the engagement with. In this way, the core mold 4 is retained and held in a state of being connected to the fixed core mold 3. Thereafter, the concrete form 1 is filled with concrete, and the concrete is cured to form a concrete product K. The core mold 4 is inserted into the concrete mold 1 through the through hole 7 formed in the side frame 2A. However, since the packing 31 attached to the holding frame 30 is provided outside the through hole 7, Packing 31
Accordingly, the airtightness is maintained, and the concrete filled in the concrete form 1 does not leak from the through holes 7. Then, when the concrete product K is removed from the mold, the core mold 4 is pulled out from the concrete mold 1. When the core mold 4 is removed from the concrete mold 1, the handle 27 is moved clockwise as shown by a chain line in FIG. When the core 4 is rotated to the outside, the core 4 is moved outward by the handle 27.
Sinks into the screw rod 18 against the coil spring 20. In this manner, the engagement between the spherical body 17 and the concave groove 21 formed in the core mold 4 is released, the step 10 formed at the tip of the core mold 4 comes out of the fixed core mold 3, and the core mold 4 is Be demolished. The bolt 32 formed on the core mold 4 when the core mold 4 is released is a holder.
Since it comes into contact with the core 16, there is no risk of the core 16 falling off the holder 16.

As described above, in this embodiment, the core die 4 is slidably guided by the holder 16 and the screw rod 18 having the holder 16 and the retractable sphere 17 urged by the coil spring 20 is screwed into the holder 16. Wear, slide the core 4
That is, the spherical body 17 is engaged with the concave groove 21 formed in the core mold 4 in conjunction with the attaching / detaching operation, so that the core mold 4 can be fixed with one touch. When the core 4 is removed, the engagement between the sphere 17 and the concave groove 21 of the core 4 can be easily released by rotating the handle 27 engaged with the core 4. it can. That is, since the core 17 is fixed in a state where the sphere 17 urged by the coil spring 20 is fitted into the groove 21 formed in the core 4, the engagement between the sphere 17 and the groove 21 is released. When the ball 17 is moved, the ball 17 must be pushed back into the screw rod 18 against the urging force of the spring 20.
According to 27, the core mold 4 can be easily removed from the mold by the principle of leverage.

FIG. 4 shows a second embodiment of the present invention. Portions having the same functions as those in the first embodiment are denoted by the same reference numerals, and only different portions will be described. In this embodiment,
A case in which a trapezoidal core mold 35 for forming the concave portion 6 is attached to and detached from the concrete product K will be described as an example. Core type 35
Is inserted into the concrete form 1 through the opening 36 of the bottom frame 2, and a U-shaped support frame 37 is fixed to the bottom side of the bottom frame 2, and guide holes are formed at four corners of the support frame 37. Form 38. The core mold 35 is integrally formed with four guide rods 40 corresponding to the guide holes 38, and the core mold 35 is inserted into the support frame 37 by inserting the respective guide rods 40 into the guide holes 38. It is guided up and down freely. Then, the guide rod 40 projecting from the support frame 37
A groove 21 is formed on the distal end side of the support frame 37, and the fixture 15 is fixed to the support frame 37 outside the guide hole 38. As in the first embodiment, the fixing member 15 is formed by screwing a screw rod 18 into a cylindrical holder 16 for guiding a guide rod 40, and is urged inside the screw rod 18 by a coil spring 20. Incorporates a sphere 17 that can come and go.

In this embodiment constructed as described above, the core 35 is moved up and down along the guide rod 40, and the concave groove 21 formed at the end of the guide rod 40 and the sphere 17 incorporated in the screw rod 18 are formed. When the positions are matched, the spherical body 17 is returned by the coil spring 20, and the core mold 35 is fixed by the engagement between the spherical body 17 and the concave groove 21. When the core mold 35 is released, the core mold 35 is pushed out from the inner surface side of the concrete form 1 so that the sphere 17 incorporated in the screw rod 18 is inserted into the screw rod 18 against the coil spring 20. As a result, the engagement between the spherical body 17 and the concave groove 21 formed in the core mold 35 is released.

Therefore, in the present embodiment, similarly to the first embodiment, the sphere 17 incorporated in the screw rod 18 in conjunction with the elevating operation of the core mold 35, that is, the attaching / detaching operation of the core mold 35.
Can be engaged with the concave groove 21 of the guide rod 40 formed in a pair with the core mold 35 to fix the core mold 35 with one touch.

In this embodiment, the core 35
Was directly raised and lowered, as shown in FIG.
A slide rod 45 that moves in the horizontal direction is provided on the support frame 37, and a guide pin 46 formed on the slide rod 45 is a core type.
By engaging with the guide groove 47 formed in the 35, the core 35 can be raised and lowered in conjunction with the sliding movement of the slide rod 45.

In the above embodiment, the concrete form 1
Although the example in which the trapezoidal core 35 is incorporated in the above is shown, for example, as shown in FIG. 6, an inverted tapered core 50, or as shown in FIG. 7, a tapered core 51 may be used. . As described above, when the inverted tapered or tapered core molds 50 and 51 are incorporated into the concrete form 1, the shaft parts 55 are formed on the core molds 50 and 51, and the shaft parts 55 are connected to the concrete molds. It is inserted into the opening 36 formed in the frame 1. Then, the holder 16 for guiding the shaft portion 55 is fixed outside the opening 36, and the core molds 50 and 51 are guided by the holder 16 and the opening 36. Thus, the cores 50 and 51 can be fixed by engaging the sphere 17 incorporated in the screw rod 18 of the holder 16 with the concave groove 21 formed in the shaft portion 55. 8 and 9, the core dies 50 and 51 may be formed in a reverse tapered shape or a tapered shape as a whole as shown in FIGS. In this case, the concave grooves 21 are formed on the outer peripheral surfaces of the core molds 50, 51, and the tapered surfaces 50A, 51A of the core molds 50, 51 are inserted into the through holes 16A of the holder 16 into which the core molds 50, 51 are inserted. Corresponding to the taper
Form 16B. The screw rod 18 screwed to the holder 16 is perpendicular to the tapered surfaces 50A, 51A of the core molds 50, 51 (the tapered portion 16B of the holder 16). Thus, the holder
16 through holes 16A and a core mold 5 to be inserted into the holder 16
By forming the cores 50 and 51 in a tapered shape, the tapered surfaces 50A and 51A of the cores 50 and 51
The core 50, 51
Is easy to assemble. As shown in FIGS. 6 and 7, even when the shaft portion 55 is formed in a columnar shape, if the surface thereof is polished or resin-coated to finish it smoothly, even if the structure does not have a draft, the holder may have a holder.
Insertion and removal of the shaft 55 from 16 is easy, and
Even when the core molds 50 and 51 are formed in a reverse tapered shape or a tapered shape as shown in FIGS. 8 and 9, if the surface treatment such as polishing or resin coating is performed, the core molds 50 and 51 can be more easily formed. Can be attached and detached.

As described above, the core 15
Since the cores 0 and 51 can be easily attached and detached, for example, the core molds 50 and 51 having different shapes inside the concrete form 1 can be easily assembled. That is, it is possible to easily change the shapes of the core molds 50 and 51 incorporated in the common concrete formwork 1 using the same. When the core molds 50 and 51 are not assembled to the concrete form 1, as shown in FIG. 10, the cover 16 is used as a built-in part for closing the opening 36 in the holder 16 for fixing the core molds 50 and 51. When the core 50 or the core 51 is removed from the concrete form 1 by forming the shaft 61 integrally with the lid 60 and forming the groove 21 in the shaft 61, It is also possible to close the opening 36 for incorporating the core molds 50 and 51 with the lid 60, and in this case, the lid 60 can be easily attached and detached by the fixture 15. Thus, core type 50 or core type
51 can be selectively mounted, and the concrete formwork 1 has extremely excellent compatibility.

FIG. 11 shows a third embodiment of the present invention. Portions having the same functions as those of the above embodiments are denoted by the same reference numerals, and only different portions will be described. In this embodiment,
A case is shown in which a fixture 15 is used for clamping the side frames 2A and 2B of the concrete formwork 1.

That is, in this embodiment, the shaft portion 65 is fixed to the adjacent one of the side frames 2A, and the holder 16 to which the fixture 15 is assembled is attached to the other adjacent side frame 2B. Then, a tapered portion 65 continuously provided in a step shape at the tip end of the shaft portion 65.
A is formed, and the holder 16 is formed with a through hole 66 for inserting the tapered portion 65A. The screw rod 18 is screwed into the through hole 66, and a coil spring is attached to the screw rod 18.
Incorporates a retractable sphere 17 biased by 20. Therefore, in the present embodiment, when the side frames 2A and 2B are erected to clamp the concrete form 1, the shaft 65 formed on one side plate 2A is fixed to the holder 16 fixed to the other side frame 2B. It is inserted into the through hole 66. As a result, the spherical body 17 incorporated in the screw rod 18 engages with the concave groove 21 formed in the shaft portion 65, and the side frames 2A and 2B can be fixed with one touch. The opening operation can be simplified.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments.
Various modifications can be made within the scope of the present invention.
For example, the shape of the core type as an assembly part is not limited to the above-described embodiment, and the basic structure of the concrete form may be appropriately selected. further,
The assembling parts are not limited to the core type. For example, as shown in FIG. 12, a magnet type curved member 68 for forming a substantially semi-spherical concave portion K1 on the outer wall of the concrete product K is used.
When fixing the curved member 68 to the inner wall of the concrete form 1, the fixture 15 can be used for positioning the curved member 68. In this case, the curved member 68 of the concrete form 1
A screw hole 70 is formed in the mounting portion of the
A screw rod 18 incorporating the screw 17 is screwed in, and positioned and fixed with a nut 72. On the other hand, a concave portion 71 serving as an engagement receiving portion for engaging with the sphere 17 incorporated in the screw hole 70 is formed on the mounting surface of the bending member 68. And the curved member is added to the concrete form 1.
When mounting 68, the curved member 68 is magnetically attracted to the inner wall of the concrete formwork 1. At this time, if the concave portion 71 formed on the mounting surface of the bending member 68 and the spherical body 17 assembled to the screw hole 70 are misaligned, the spherical body 17 is screwed into the screw hole 70 against the coil spring 20.
When the position of the concave portion 71 of the curved member 68 matches the position of the spherical body 17 by sliding the curved member 68 adsorbed on the inner wall of the concrete form 1 back and forth or right and left, the spherical body 17 returns and the concave 71 The bending member 68 can be accurately positioned by the engagement between the ball member 17 and the sphere 17. As described above, when the recess K1 is formed in the concrete product K,
Usually, since many depressions K1 are formed in this kind of concrete product K, these positioning operations are extremely complicated. However, simply fixing the fixing device 15 to the mounting portion thereof allows the depression K1. It is possible to extremely easily position the curved member 68 for molding the slab, and the assembling workability can be simplified.

The basic structure of the fixture is not limited to the above embodiment. That is, as shown in FIG.
If the screw rods 18 to which the holder 16 is screwed are provided in two stages, upper and lower, it is possible to more firmly fix them.

As shown in FIG. 14, a holder 80 into which the screw rod 18 is screwed is formed in a rectangular cylindrical shape, and the spherical body 17 incorporated in the screw rod 18 is formed into a concave shape of a shaft portion 81 formed in a square shape. You may comprise so that it may engage with the groove | channel 82.

Further, in each of the above embodiments, an example was shown in which a coil coil spring was incorporated in a screw rod and a sphere was urged by this spring. However, as shown in FIG. The locking piece 91A of the torsion spring 91 may be resiliently locked in the concave groove 96 of the shaft portion 95 formed in a core type or the like. Any structure can be used as long as it can be disengaged with one touch in conjunction with the attaching / detaching operation.

[0030]

According to the fixture for use in a concrete form according to the first aspect of the present invention, there is provided a fixture for fixing an assembling component detachably mounted on a side frame of the concrete form or a concrete form. The fixing tool includes an engagement projection that engages with an engagement receiving portion formed on the side frame or the assembled component, a holding metal fitting that holds the engagement projection so that the engagement projection can be protruded and retracted is provided, and the fixing metal fitting is provided from the holding metal fitting. Since the urging means for projecting the joint projections is provided, it is possible to extremely easily clamp the concrete formwork or position and fix the built-in component to the concrete formwork.

According to the fixing tool used for the concrete formwork of the second aspect, in the fixing tool used for the concrete formwork according to the first aspect, the built-in component is constituted by a core mold incorporated in the concrete formwork. The concrete form is provided with guide means for slidably guiding the core mold, and the holding means is provided on the guide means. Can be fixed with one touch.

According to the fixing tool used for the concrete form of the third aspect, in the fixing tool used for the concrete form according to the first aspect, the engaging receiving portion is formed on one of the adjacent concrete forms. The fixing tool is provided on the other adjacent concrete formwork. Thereby, the engagement protrusion engages with the engagement receiving portion in conjunction with the opening and closing operation of the concrete formwork.

According to the fixture for use in the concrete form of the fourth aspect, in the fixture for use in the concrete form of the first aspect, the assembled component is magnetically attracted to an inner surface of the concrete form. It is a curved member that forms a concave portion in the concrete formwork, and the fixing tool is provided at a mounting portion of the curved member. Thereby, the curved member attached to the concrete form can be accurately positioned.

According to a fifth aspect of the present invention, there is provided a fixing tool for use in a concrete form according to any one of the first to third aspects, wherein the engaging protrusion and the engaging receiving portion are provided. Since the operating means for releasing the engagement is provided, it is easy to release the engagement between the engagement receiving portion and the locking projection.

According to the fixing tool used for the concrete formwork of claim 6, it is a fixing means for fixing a side frame of the concrete formwork or an assembling component detachably mounted on the concrete formwork, wherein the fixing means is Since the holding fitting is provided with the locking piece that resiliently locks with the engagement receiving portion formed on the side frame or the assembled part, the structure of the fixing tool can be simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view of a concrete formwork showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the holder part.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a modification in which the core type slide mechanism is incorporated.

FIG. 6 is a cross-sectional view showing a modified example using the above-described inverted tapered core type.

FIG. 7 is a cross-sectional view showing a modification using a tapered core according to the embodiment.

FIG. 8 is a cross-sectional view showing a modified example of the above-described inverted tapered core type.

FIG. 9 is a cross-sectional view showing a modified example of the tapered core type.

FIG. 10 is a cross-sectional view showing a modification in which a lid is used as an assembling component.

FIG. 11 is a sectional view of a concrete formwork showing a third embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a modification using a curved member as an assembly component.

FIG. 13 is a cross-sectional view showing a modification of the two sets of fixtures.

FIG. 14 is an exploded perspective view showing a modification in which a shaft is formed in a prismatic shape.

FIG. 15 is a sectional view showing a modification using a torsion spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete formwork 2A, 2B Side frame 4, 35, 50, 51 Core type 11 Engagement recess 15 Fixture 17 Sphere (engagement projection) 16 Holder (guide means) 18 Screw rod (holding tool) 20 Spring (with 21) 82 Groove (engagement receiving part) 27 Handle (operating means) 60 Lid (assembly part) 71 Depression (engagement receiving part) 91 Torsion spring 91A Locking piece

Claims (6)

[Claims] 1. A fixture for fixing a side frame of a concrete formwork or an assembly component detachably mounted on the concrete formwork, wherein the fixture is formed on the side frame or the assembly part. An engaging projection for engaging with the receiving portion is provided, a holding fitting for holding the engaging projection so as to be able to protrude and retract is provided, and a biasing means for projecting the engaging projection from the holding fitting is provided. Fixture used for concrete formwork. 2. A concrete mold for incorporating the built-in part into the concrete form, wherein the concrete form is provided with guide means for slidably guiding the core form.
2. The fixture used for a concrete formwork according to claim 1, wherein said holding means is provided on said guide means. 3. The concrete formwork according to claim 1, wherein the engagement receiving portion is formed on one adjacent concrete formwork, and the fixing tool is provided on the other adjacent concrete formwork. Fixture used for 4. A curved member, wherein the assembled component is magnetically attracted to an inner surface of the concrete form to form a concave portion in the concrete form, and the fixing member is provided at a mounting portion of the curved member. The fixing tool used for the concrete formwork according to claim 1, wherein 5. The fixing device according to claim 1, further comprising an operation device for releasing the engagement between the engagement protrusion and the engagement receiving portion. Utensils. 6. A fixture for fixing a side frame of a concrete formwork or an assembly component detachably mounted on the concrete formwork, wherein the fixture is formed on a holding metal fitting on the side frame or the assembly part. The fixing tool used for a concrete formwork according to claim 1, further comprising a locking piece that resiliently locks with the engaging receiving portion that engages.