JP2550646Y2 - Separator fixture - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for fixing and supporting both ends of a separator for maintaining the spacing of a form panel which is fixed to an inner surface of a form panel opposed to the form panel during construction of a concrete structure. The present invention relates to a separator fixture used.

[0002]

2. Description of the Related Art As is well known, when constructing a reinforced concrete structure, two upper and lower separators are mounted substantially horizontally between two oppositely arranged form panels, thereby forming a space between the form panels. However, in this case, the upper separator is usually attached after the reinforcement so that it does not become an obstacle when arranging the reinforcing bars in the formwork. Conventionally, various separator fixtures have been proposed that are fixed to the inner surface of a form panel and used so that the upper separator can be easily mounted.

As an example of the prior art, Japanese Utility Model Publication No.
No. 9734 discloses a hard tool made of a hard synthetic resin, which is provided with a deep and wide upper opening-shaped groove for receiving a large-diameter head body at the end of a separator at substantially the center of the body, and a fixing tool facing this groove. A shallow and narrow upper opening type recess for receiving the separator shaft rod portion is provided at the tip of the main body, and the separator is inserted into the recess so as to protrude so as to always close the upper opening of the recess and direct the separator. Laterally, a pair of left and right elastic tongues for preventing lifting are arranged in a substantially V-shape (more precisely, an inverted C-shape) as viewed from the front, which is symmetrical with respect to the vertical center line of the recess, and the two elastic tongues are forcibly forced. There is disclosed a separator in which the separator that correctly receives and guides into the recess due to widening deformation can be naturally restrained from being detached from the recess by restoring deformation of the tongue piece.

[0004]

However, in the case of the separator fixing device of the prior art described above, since both elastic tongues are arranged in an inverted C shape, when the concrete is poured into the formwork, There was a risk that the separator would come off due to the flow pressure of the concrete. That is, the above configuration is
After fitting the shaft portion of the separator into the concave, the two elastic tongues that have been elastically restored have an acute crossing angle,
The separator is lifted by the flowing pressure or expansion pressure of the concrete to be cast, so that the separator is lifted by the flowing pressure or the expansion pressure of the concrete. The rod intervenes in the gap between the two elastic tongues and pushes these elastic tongues open to both sides, so that they easily come out of the recess.

Further, since the gap formed between the tips of the pair of elastic tongues projecting toward the center of the recess is much smaller than the diameter of the shaft portion of the separator, the gap may be applied to the fingers when the separator is fitted. Without considerable force, the two elastic tongues cannot be forcibly expanded and deformed. For this reason, the work load at the time of fixing many separators over the length direction of a formwork becomes large.

SUMMARY OF THE INVENTION The present invention solves such a problem. The operation of pushing the separator into the fixture can be performed quickly and easily, and the separator can be correctly mounted between the two form panels without tilting. It is intended to do so.

[0007]

In order to achieve the above object, a separator fixing device according to the present invention has a fixing device main body block 1 made of a hard synthetic resin as shown in the drawings corresponding to the embodiments. A wide bottomed vertical hole 2 is formed in the center of the block 1 and a narrow vertical groove 9 is formed in the thickness direction of the rear end wall 8 facing the vertical hole 2. 2 has a size and a shape that allows the large-diameter head body 4 at the shaft end of the separator to be fitted from above, and the vertical groove 9 has a size that allows the shaft 3a of the separator 3 to be engaged from above. I do.

The bottom surface 11 of the vertical groove 9 is capable of receiving the peripheral surface of the shaft portion of the separator.
A semi-circular concave curved surface portion 11a that is continuous from the flat surface portion, and a flat surface portion 11 extending from the concave curved surface portion 11a to the other opposing side surface 10b.
and a step 11b is provided between the concave curved surface portion 11a and the flat surface portion 11c. The vertical groove 9
A resilient tongue 12 for pressing the upper surface of the separator shaft extending obliquely downward from the other opposing side surface 10b toward the center is integrally formed with the resilient tongue 12 and the other opposing side surface 10b of the vertical groove 9. And a locking space S which can lock the separator shaft 3a.

In the above construction, a short elastic piece 17 for preventing the elastic tongue 12 from floating is obliquely directed from one opposing side surface 10a of the vertical groove 9 to the elastic tongue 12 for pressing the upper surface of the separator shaft. If it protrudes downward, the removal of the separator 3 can be more reliably prevented.

[0010]

In the separator fixing device having the above-mentioned structure, a pair of fixing members formed symmetrically with respect to the vertical center line of the vertical groove 9 are paired. , The vertical holes 2 and the vertical grooves 9 are fixed in an upright posture with the opening sides facing upward. Then, the separator 3 has the large-diameter head bodies 4 at both ends thereof inserted into the corresponding vertical holes 2 of the fixing tool from above, and simultaneously pushes the tip of the shaft rod into the vertical groove 9 against the urging force of the elastic tongue piece 12. By this, the semicircular concave curved surface portion of the vertical groove bottom surface 11 is formed by the elastic tongue piece 12 in which the separator shaft rod portion 3a is elastically restored.
It is locked in the fixture while pressed against 11a.

In this case, since the elastic tongue piece 12 extends from the other opposing side face 10b of the longitudinal groove 9 toward the center, a vertical groove is provided between the elastic tongue piece 12 and the one opposing side face 10a. A gap of about half of the width, that is, a gap of a width slightly exceeding the radius of the separator shaft portion is formed, and the biasing force of the elastic tongue piece 12 acts on only one side of the peripheral surface of the separator 3. The separator 3 can be fitted up to the bottom surface 11 of the vertical groove 9 only by lightly pushing it.

After fitting both ends of the separator 3 into the fixtures in this manner, the concrete 16 is placed in the formwork.
The expansion pressure of the concrete 16 acts to push up the separator 3. At this time, the upper surface of the separator 3 is displaced upward against the urging force while the upper part of the peripheral surface is pressed by the elastic tongue piece 12. Since it is continuous with the portion 11a without any step, displacement of the separator 3 toward one of the opposed side surfaces is prevented. Therefore, the lifting force of the separator 3 due to the swelling of the concrete 16 acts exclusively on the locking space side. By this acting force, the separator 3 is moved from the concave curved surface portion 11a of the vertical groove bottom 11 to the stepped portion.
11b, it rides on the flat surface 11c and is fixed in the locking space S while being sandwiched between the inner surface of the elastic tongue and the other opposing side surface 10b, so that even when the flow pressure of the concrete 16 is applied, Separation of the separator shaft portion 3a from the groove 9 is prevented as much as possible. Since this fixed state is common to both fixtures on the form panels 6, 6, the separator 3 is mounted in a correct posture orthogonal to the form panels 6, 6.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 denotes a fixture main body block formed by injection molding of a hard synthetic resin, and a frusto-conical portion is integrally formed in front of a main portion having a flat U-shaped cross section. The main body block 1 is formed with a bottomed vertical hole 2 having an open upper surface at the center thereof. This vertical hole 2 is a separator 3
The large-diameter head body 4 provided at the shaft end is formed in a square hole shape that is wide and has a greater depth and depth than the large-diameter head body 4 so that the large-diameter head body 4 can be smoothly fitted from above.

The front end wall 5 of the main body block 1 facing the vertical hole 2 constitutes the frustoconical portion, and the outer surface thereof is a flat vertical circular surface 5a which is in contact with the inner surface of the form panel 6.
Further, a nut-like body 7 is buried in the thickness direction in a coaxial state with the center of the circular outer surface so as to penetrate therethrough.

The rear end wall 8 of the main body block 1 facing the vertical hole 2 has an outer surface formed as a vertical flat surface 8a, and a vertical groove 9 capable of engaging the separator shaft 3a from above in the thickness direction.
Is pierced. The vertical groove 9 is formed narrower than the vertical hole 2, and the opposing side surfaces 10a and 10b are formed on parallel vertical wall surfaces. The bottom surface 11 of the vertical groove 9 has a concave curved surface portion 11a continuous from the one side surface 10a without any step,
The other opposite side surface from the concave curved surface portion 11a through the step portion 11b
And a flat portion 11c extending to 10b.

More specifically, the concave curved surface portion 11a of the bottom surface 11 is formed in a semi-arc shape slightly larger than the diameter of the separator shaft portion in order to be able to receive the peripheral surface of the separator shaft portion 3a. At the other end, a step portion 11b is formed at a portion where the arc is a half circle or a half circle before, and is continuous with the flat portion 11c. The flat portion 11c is formed to have a width of about half the diameter of the separator shaft portion, and forms a substantially right-angled corner portion with the other opposing side surface 10b. Therefore, the vertical groove 9 formed in this manner just has one side of the U-shaped groove formed by raising opposing side surfaces in parallel from both sides of the bottom surface portion formed into a semicircular shape having the same diameter as the bottom concave curved surface portion 11a. The shape becomes wider by the width of the flat portion 11c.

On the other opposing side surface 10b of the vertical groove 9, an elastic tongue piece 12 for pressing the upper surface of the separator three-axis rod is formed integrally and extends diagonally downward from the upper end toward the center of the vertical groove 9. It is. This elastic tongue piece 12 has a C-shaped steal portion 12a formed between the base end portion and the other opposite side surface 10b of the vertical groove 9 for smooth elastic bending deformation. Is formed in the shape of a sharp edge so that when the separator shaft 3a is received by the concave concave surface 11a of the vertical groove 9, the separator shaft 3a is closely opposed to the shaft 3a. And this elastic tongue 12
A locking space S of the separator shaft 3a is formed between the vertical groove 9 and the other opposing side surface 10b.

In the separator fixing device having such a configuration, a pair of the fixing members formed symmetrically with respect to the vertical center line of the vertical groove 9 are used. That is, as shown in FIG. 6, these pair of separator fixtures are respectively provided with bolt insertion holes 13, 13 and nut-like bodies 7 of the form panels 6, 6 arranged on both sides of the concrete casting part, which face each other in front of each other. At a position where the screw holes coincide with each other on the same axis, the front end wall outer surface 5a is brought into face-to-face contact with the inner surface of the form panel so that the opening sides of the vertical holes 2 and the vertical grooves 9 face upward, and the bolt insertion holes 13, 13 are formed. Is screwed to the nut-like body 7 so as to be connected and fixed to the separator body 15 via the bolt 14.

Next, in each separator fixture, the large-diameter head body 4 of the separator 3 is inserted from above the vertical hole 2 and the vertical groove 9 is simultaneously inserted when the large-diameter head body 4 is inserted.
The separator shaft rod portion 3a fitted into the vertical groove 9 is further pushed in against the urging force of the elastic tongue piece 12, and received by the concave concave surface portion 11a on the bottom surface of the vertical groove 9. When both separator fixing members receive both ends of the separator 3 in this manner, the separator 3 is disposed in a state of being orthogonal to the form panels 6, 6. Is prevented from being pulled out upward.

After the separator 3 is mounted between the form panels 6 and 6 as described above, concrete 16 is poured into the form as shown in FIG. The groove 9 is also filled, and both ends of the separator 3 are lifted up from the bottom concave curved surface portion 11a of the longitudinal groove 9 once fitted by the action of the flow pressure and the expansion pressure, and hit the elastic tongue piece 12. 8A, the separator shaft 3a is displaced upward against the urging force.
As shown in (1), the displacement of the vertical groove 9 to one side is restricted by the one opposing side surface 10a, and the pressure contact action from the elastic tongue piece 12 to the other side of the vertical groove 9 obliquely upward causes two points. From the concave curved surface portion 11a shown by the dashed line, it moves over the step portion 11b to the locking space S shown by the solid line, and finally, by the pressing force of the elastic tongue piece 12, the other opposing side surface 10b of the vertical groove 9 It is fixed in a pressed state.

In this case, the directions of displacement of both ends of the separator 3 are in the same direction because both separator fixing members are formed in a symmetrical shape, so that the separator 3 is always substantially perpendicular to the form panels 6 and 6. It is held in a state of being mounted in a correct posture.

In the present invention, as shown in FIG. 9, the elastic tongue piece 12 for pressing the upper surface of the separator three-axis rod from the upper and lower middle part of one of the side surfaces 10a of the vertical groove 9 provided in the main body block 1. By making the short elastic piece 17 project diagonally downward, the upward displacement of the elastic tongue piece 12 pushed up by the upward displacement of the separator shaft 3a due to the expansion pressure of the cast concrete 16 is effective. This is convenient because it can be prevented.

[0023]

As described above, according to the separator fixing device of the present invention, the fixing device main body block 1 is formed of a hard synthetic resin, and the large-diameter head body 4 at the end of the separator shaft is disposed at the center of the main body block 1. A wide vertical hole 2 with a bottom is formed so that the shaft 3b of the separator 3 can be engaged from above in the thickness direction of the rear end wall 8 facing the vertical hole 2. A semicircular concave curved surface portion 11a which penetrates the groove 9 and which can receive the bottom surface 11 of the vertical groove 9 on the peripheral surface of the separator shaft and is continuous from one of the opposed side surfaces 10a without any step, and the concave curved surface portion 11a And a flat portion 11c extending from the front surface to the other opposing side surface 10b, and a step portion 11b is provided between the concave curved surface portion 11a and the flat surface portion 11c.
b, an elastic tongue 12 for pressing the upper surface of the separator shaft extending obliquely downward toward the center of the vertical groove 9 is integrally formed, and between the elastic tongue 12 and the other opposing side surface 10b of the vertical groove 9. The locking space portion S which can lock the separator shaft portion 3a is formed. A pair of fixing members formed symmetrically with respect to the vertical center line of the vertical groove 9 is paired with each other, and The separators 3 can be easily mounted by simply inserting the both ends of the separators 3 from above each fixture body block 1 in a state where the separators 3 are fixed at the same height facing positions on the inner surfaces of the facing form panels. And quickly formwork panels 6,6
Can be installed in between.

That is, since the elastic tongue piece 12 extends from the other opposing side face 10b of the vertical groove 9 toward the center, a vertical groove is provided between the elastic tongue piece 12 and the one opposing side face 10a. A gap of about half of the width, that is, a gap of a width slightly exceeding the radius of the separator shaft portion is formed, and the biasing force of the elastic tongue piece 12 acts on only one side of the peripheral surface of the separator 3. The separator 3 can be fitted up to the bottom surface 11 of the vertical groove 9 only by lightly pushing it. Accordingly, unlike the prior art described above, in which the separator shaft cannot be pushed in unless a strong force is applied to the fingers, a large number of separators are quickly mounted in the formwork with a relatively small work load. can do.

After the separator 3 is mounted in the formwork, the separator 3 is pushed up by the flowing pressure and the expansion pressure of the concrete 16 which has been cast. At this time, the separator shaft 3a is connected to one of the opposed side surfaces 10a. Is continuously connected to the concave curved surface portion 11a of the vertical groove bottom surface 11 without any step. Then, from the concave curved surface portion 11a of the vertical groove bottom surface 11, it rides on the flat surface portion 11c via the step portion 11b, and in the locking space portion S, the inner surface of the elastic tongue and the other opposing side surface 10b
As a result, even when the fluid pressure of the concrete 16 is applied, the separator shaft 3a can be prevented from coming off the vertical groove 9 as much as possible. In addition, since this fixed state is common to the fixtures on both of the form panels 6, 6, the separator 3 is mounted in a correct posture orthogonal to the form panels 6.

As described above, in the present invention, the direction of action of the flow pressure and expansion pressure of the concrete 16 on the separator 3 is regulated so that the concrete 16 fits naturally into the intended locking space S. 3a is restricted by the elastic tongue piece 12 and has a practically excellent effect such that there is no possibility that it will come off due to the flow pressure or expansion pressure of concrete.

According to the second aspect, the elastic tongue piece 12 is prevented from rising from one of the side surfaces 10a of the vertical groove 9 provided in the main body block 1 to the elastic tongue piece 12 for pressing the upper surface of the separator shaft. Since the short elastic piece 17 is projected obliquely downward, the elastic tongue piece 12 pushed up by the upward displacement of the separator shaft 3a due to the expansion pressure of the casting concrete 16 hits the elastic piece 17 and raises the upward displacement. And the removal of the separator 3 can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view seen from the rear.

FIG. 2 is a perspective view seen from the front.

FIG. 3 is a plan view

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a side view showing a state of attachment to a formwork.

FIG. 7 is an enlarged sectional view of a main part in FIG. 6;

FIG. 8 is a rear view thereof.

FIG. 9 is a rear view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixture main body block 2 Vertical hole 3 Separator 3a Separator shaft part 4 Large diameter head body 8 Rear end wall 9 Vertical groove 10a One opposing side surface of vertical groove 10b The other opposing side surface of vertical groove 11 Bottom surface of vertical groove 11a Vertical Concave curved surface on bottom of groove 11b Step on bottom of vertical groove 11c Flat on bottom of vertical groove 12 Elastic tongue for pressing upper surface of separator shaft 17 Elastic piece S Locking space

Claims (2)

(57) [Scope of request for utility model registration] 1. A fixing tool main body block 1 is formed of a hard synthetic resin, and a wide bottomed vertical hole 2 is formed in a central portion of the main body block 1 so that a large diameter head body 4 at an end of a separator shaft can be fitted from above. In the thickness direction of the rear end wall 8 facing the vertical hole 2, a narrow vertical groove 9 through which the shaft rod portion 3a of the separator 3 can be engaged from above is formed. Bottom
11 is a semicircular concave curved surface portion which can receive the peripheral surface of the separator shaft rod portion and is continuous from one of the opposed side surfaces 10a of the vertical groove 9 without any step.
11a and a flat portion 11c extending from the concave curved surface portion 11a to the other opposing side surface 10b.
c, and a resilient tongue piece 12 for pressing the upper surface of the separator shaft, which extends obliquely downward from the other opposite side surface 10b toward the center of the vertical groove 9, is formed integrally. A separator fixing device, wherein a locking space portion S capable of locking the separator shaft portion 3a is formed between the elastic tongue piece 12 and the other opposite side surface 10b of the vertical groove 9. 2. The elastic tongue piece extends from one opposing side face 10a of the vertical groove 9 to the elastic tongue piece 12 for pressing the upper surface of the separator shaft.
2. The separator fixing device according to claim 1, wherein a short elastic piece (17) for preventing floating of the (12) is projected obliquely downward.