JPH0722438Y2 - Variation prevention device for concrete form spacing controller - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is a concrete formwork space adjustment in which, when pouring concrete, after adjusting the formwork space that determines the thickness of the concrete, the space between the formwork does not change. The present invention relates to a fluctuation prevention device for a container.

[0002]

2. Description of the Related Art When placing concrete, after adjusting the interval of the formwork which determines the thickness of the concrete, the variation of the concrete formwork space adjuster that has been conventionally used to maintain the interval is prevented. An example of the device will be described with reference to the cross-sectional plan view of FIG.

One formwork 2 is laterally fixed to an H-shaped steel 1 that is placed in the soil of a civil engineering work site at intervals. Although a horizontal sheet pile is shown as one formwork 2 in FIG. 7, as one formwork 2, a mountain stop concrete precast in order to prevent landslide may be used as one formwork 2. . Reference numeral 3 is a pipe-shaped anchor, and by driving a nail 6 into one of the molds 2 through a hole of a plate 5 welded to a tip 4 of the anchor 3, the anchor 3 is perpendicular to the surface of the one mold 2. It is fixed to. The proximal end 7 side of the pipe-shaped anchor 3 is reduced in diameter so as to have a shape with a small diameter.
A female screw is engraved on the inner surface of the screw so that the screw rod 8 can be screwed. The screw rod 8 is engraved over its entire length with a male screw adapted to the female screw engraved on the base end 7 of the anchor 3.

Reference numeral 9 denotes a cylindrical locking tool, and the locking tool 9 has a large inner diameter on the distal end 10 side, which is closely fitted to the outer surface of the non-reduced portion of the anchor 3 described above. A hole 11 is provided. A small-diameter oblique hole 1 that is smaller in diameter than the large-diameter hole 11 and communicates obliquely with the large-diameter hole 11 on the proximal end 12 side of the locking tool 9.
3 is provided.

When assembling the concrete formwork, the anchor 3 is fixed to one of the formwork 2 with nails 6, the tip end side of the screw rod 8 is screwed into the base end 7 of the anchor 3, and then the locking tool 9 is used. Is fitted from the base end side of the screw rod 8 to the outside of the screw rod 8, and then the base screw side of the screw rod 8 is fixed by screwing the cap screw 15 provided on the front end face side of the formwork fixing member 14. To do. Then, the screw rod 8 is further screwed into the anchor 3 so that the distance 1 between the base end surface 16 of the mold stop member 14 and the surface of one mold 2 is increased.
7 has the same size as the thickness of the concrete to be placed. The base end surface 16 of this formwork stopping member 14
A bolt 18 is integrally projectingly provided at the center of the.

Next, the tip 10 side of the locking tool 9 is fitted to the base end 7 side of the anchor 3, and the locking tool 9 is tapped from the base end 12 side with a hammer or the like, and a large-diameter hole of the locking tool 9 is applied with a strong force. 11 is tightly fitted to the outer surface of the non-reduced portion of the anchor 3.
As a result, the central axis of the large diameter hole 11 substantially coincides with the central axis of the anchor 3. Base end 12 of the locking device 9
Since the small-diameter oblique hole 13 provided on the side is smaller in diameter than the large-diameter hole 11 and communicates obliquely with the large-diameter hole 11, the large-diameter hole 11 is tightly attached to the outer surface of the non-reduced portion of the anchor 3. When the center axis of the large-diameter hole 11 is substantially aligned with the center axis of the anchor 3, one side of the small-diameter slanted hole 13 on the base end 12 side bites into the outer surface of the screw rod 8 and is screwed. 8 can no longer rotate. Therefore, the distance 17 between the base end surface 16 of the mold stop member 14 and the surface of the one mold 2 is fixed and does not change.

Next, the other formwork 19 is fitted into the bolts 18 of the formwork stop member 14 so that the inner surface of the other formwork 19 is brought into close contact with the base end face 16 of the formwork stop member 14, so that the other formwork 19 is closed. The space between the inner surface and the surface of one of the molds 2 is determined by the mold stop member 1
Distance 17 between the base end face 16 of No. 4 and the surface of one mold 2
Equal to and set to the thickness of the concrete to be placed. Next, the horizontal pipe member 20 and the vertical pipe member 21 are joined to the outer surface of the other formwork 19 in a cross shape, and the tip of the home tie 22 attached to the vertical pipe member 21 is screwed into the bolt 18 of the formwork stop member 14. Vertical pipe material 2
1. The other formwork 19 is fixed via the horizontal pipe member 20. In this way, when the concrete 23 is placed between the one mold 2 and the other mold 19, the concrete 2
3 is to be placed with a thickness of exactly 17 mm.

[0008]

However, in the above-mentioned conventional device, the tip 10 side of the locking tool 9 is fitted to the proximal end 7 side of the anchor 3, and the locking tool 9 is hit from the proximal end 12 side with a hammer or the like. When the large-diameter hole 11 of the locking tool 9 is tightly fitted to the outer surface of the non-reduced portion of the anchor 3 with a strong force, the hammer must be prevented from hitting the screw rod 8. Hitting a small surface on the end 12 side with a hammer had a drawback that the work was difficult to perform.

Further, since the conventional locking tool 9 has a structure in which the small-diameter oblique hole 13 provided on the base end 12 side communicates with the large-diameter hole 11 obliquely, There is a drawback that the cost becomes high because it requires time and effort to pull out.

The present invention solves the above-mentioned conventional drawbacks and makes it easier to hit with a hammer when closely fitting the hole on the distal end side of the anchor to the outer surface of the non-reduced portion of the anchor. It is an object of the present invention to provide a fluctuation preventing device for a concrete form interval controller, which enables easy and easy operation and does not need to provide an oblique hole so that the price of the locking tool is low. To do.

[0011]

A variation prevention device for a concrete formwork space adjuster according to the present invention has a base end side whose diameter is reduced and a female screw is engraved on the inner surface of the base end side so that the tip end is on one formwork. A pipe-shaped anchor to be fixed, a screw rod whose distal end side is screwed to the female screw of the anchor, and a first hole tightly fitted to the outer surface of the anchor on the distal end side. A locking tool having a smaller diameter and having a second hole on the base end side that is eccentric to the center of the first hole and communicates with the first hole and allows the screw rod to be inserted, and a base of the locking tool. It is characterized in that it is provided with an overhanging portion projecting laterally from the end side and the other formwork fixed to the base end side of the screw rod.

[0012]

When the first hole on the distal end side of the engaging member is tightly fitted to the outer surface of the non-reduced portion of the anchor, the overhang projecting to the side of the proximal end of the locking device is provided. The part can be tapped with a hammer, and the second hole is eccentric with respect to the first hole but is not inclined, which facilitates manufacture of the locking tool.

[0013]

EXAMPLES Next, examples of the present invention will be described.

2 is an enlarged cross-sectional plan view showing an embodiment of the locking device 30, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a rear view of FIG. 3 seen from above. As shown in FIGS. 2 to 4, the distal end 31 side of the locking tool 30 has a cylindrical shape, and an overhanging portion 33 is provided on the lateral side of the locking tool 30 on the proximal end 32 side. The surface of 33 on the base end 32 side is flush with the base end 32.

The engaging member 30 is made of a hard synthetic resin such as metal or nylon resin, and is closely fitted to the outer surface of the non-reduced portion of the anchor 3 described with reference to FIG. A first hole 34 having a matching inner diameter is provided. The length of the first hole 34 is preferably about 70 to 80% of the total length of the locking tool 30. A second hole 35 having a diameter smaller than that of the first hole 34 is provided on the proximal end 32 side of the locking tool 30 so that the center of the second hole 35 is eccentric to the center of the first hole 34 and communicates with the first hole 34. It is provided.

When this locking tool 30 is used, as shown in FIG. 5, a transverse sheet pile fixed to the H-shaped steel 1 placed at intervals in the soil of a civil engineering site, as in the conventional case, Or, after fixing the anchor 3 with the nail 6 to one formwork 2 such as a mountain stop concrete that has been placed in advance to prevent landslide,
The threaded rod 8 similar to the conventional one is inserted into the first hole 34 and the second hole 35 of the locking tool 30, and the base end side of the screwed rod 8 also has the tip of the form stop member 14 similarly to the conventional one. A form screw fixing member 14 is fixed to the base end side of the screw rod 8 by screwing a cap screw 15 provided on the surface side.

Next, as shown in FIG. 6, the tip of the screw rod 8 is screwed into a female screw 36 (see FIG. 5) engraved on the inner peripheral surface of the anchor 3 on the base end 7 side, and the form stop member is fixed. Until the distance 17 between the base end surface 16 of 14 and the surface of one of the molds 2 becomes the same size as the thickness of the concrete to be placed,
The screw rod 8 is screwed into the base end 7 side of the anchor 3.

As described above, the screw rod 8 is attached to the formwork fixing member 14
After the screw rod 8 is fixed, the screw rod 8 is screwed into the anchor 3 in addition to the assembling procedure.
After screwing the tip of the screw into a female screw 36 engraved on the inner peripheral surface of the anchor 3 on the base end 7 side, the locking tool 30 is fitted from the base end side of the screw rod 8 to the outside of the screw rod 8 and then the To the base end side of the screw rod 8 by screwing the cap screw 15 of the form frame fixing member 14 to fix the form frame fixing member 14 to the base end side of the screw rod 8, and then the screw rod 8 of the anchor 3. Screw it to the base end 7 side so that the distance 17 between the base end face 16 of the form stop member 14 and the surface of one of the forms 2 becomes the same as the thickness of the concrete to be placed. An assembly procedure can also be taken.

After the distance 17 between the base end surface 16 of the formwork stopping member 14 and the surface of one of the formwork 2 becomes the same as the thickness of the concrete to be placed, the tip 31 of the locking tool 30. The side is fitted to the base end 7 side of the anchor 3, and the overhanging portion 33 projecting laterally on the base end 32 side of the locking tool 30 is hit with a hammer or the like, and the first force of the locking tool 30 is struck with a strong force. Hole 34
Is tightly fitted to the outer surface of the non-reduced portion of the anchor 3. This gives a tendency for the central axis of the first hole 34 to coincide with the central axis of the anchor 3,
The second hole 35, which is in communication with the first hole 34 with its center eccentric to the center of the first hole 34, comes into contact with the outer surface of the screw rod 8 with a strong force, and the screw rod 8 cannot rotate. . Therefore, the distance 17 between the base end surface 16 of the mold stop member 14 and the surface of the one mold 2 is fixed and does not change.

When hitting the base end 32 side of the locking tool 30 with a hammer or the like, the overhanging portion 33 is hit, so that the hitting surface becomes wider than in the past and the possibility of hitting the screw rod 8 is reduced. You can work easily.

In this way, the first hole 34 of the locking tool 30 is closely fitted to the outer surface of the non-reduced portion of the anchor 3, and the base end surface 16 of the mold holding member 14 and one of the molds. After fixing the distance 17 between the surface of the mold 2 and the surface of the mold 2, the other formwork 19 is fitted into the bolt 18 of the formwork stop member 14 to fix the inner surface of the formwork 19 to the form stop member 14 as shown in FIG. Base end face 16
The inner surface of the other mold 19 and the one mold 2
Is equal to the distance 17 between the base end surface 16 of the mold stop member 14 and the surface of one of the molds 2, and is set to the thickness of the concrete to be placed.
Next, the horizontal pipe member 20 and the vertical pipe member 21 are joined to the outer surface of the other mold frame 19 in a cross shape, and the tip of the home tie 22 attached to the vertical pipe member 21 is screwed into the bolt 18 of the mold frame fixing member 14. Then, the other formwork 19 is fixed via the vertical pipe member 21 and the horizontal pipe member 20. In this way, between the formwork 2 on the one hand and the formwork 19 on the other hand, the concrete 23
When the concrete is cast, the concrete 23 is accurately cast with a thickness of the distance 17.

[0022]

According to the present invention, since the projecting portion 33 is provided on the side of the base end 32 side of the locking tool 30, the locking tool 30 is hit by hammering the base end 32 side of the locking tool 30. When the first hole 34 of the anchor 3 is tightly fitted to the outer surface of the non-reduced portion of the anchor 3, the surface that can be hit by hitting the overhanging portion 33 becomes wider than before, The risk of hitting the rod 8 is reduced, and the screw rod 8 that holds the concrete pouring thickness can be fixed by an easy operation.

Since the center of the second hole 35 of the locking member 30 is eccentric with the center of the first hole 34 and is not inclined as in the conventional case, the manufacturing of the locking device 30 is performed. This saves time and labor and reduces the cost of the locking device 30.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing a usage state of an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing, in an enlarged manner, one embodiment of the locking device of the present invention.

FIG. 3 is a plan view of FIG.

FIG. 4 is a rear view of FIG. 3 viewed from above.

FIG. 5 is a cross-sectional plan view showing a first assembled state of the present invention.

FIG. 6 is a cross-sectional plan view showing the next assembled state of FIG. 5;

FIG. 7 is a cross-sectional plan view showing an example of a conventional device.

[Explanation of symbols]

 2 one formwork 3 anchor 4 tip 7 base end 8 screw rod 19 other formwork 30 locking tool 31 tip 32 base end 33 overhang 34 first hole 35 second hole 36 female screw

Claims (1)

[Scope of utility model registration request] 1. A pipe-shaped anchor whose diameter is reduced on the base end side and a female screw is engraved on the inner surface of the base end side and whose tip is fixed to one mold, and the tip side is screwed to the female screw of the anchor. Has a threaded rod and a first hole tightly fitted to the outer surface of the anchor on the distal end side, and has a diameter smaller than that of the first hole so that the center of the first hole is eccentric to the first hole. And a locking member having a second hole on the base end side for communicating with the screw rod and allowing the screw rod to be inserted therethrough, an overhanging portion projecting laterally to the base end side of the locking rod, and a base end of the screw rod. The other formwork fixed to the side, and the fluctuation prevention device of the concrete formwork space adjuster characterized by the above-mentioned.