JP2016079564A - Support jig of support pipe for concrete mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support jig that allows a jack of a support pipe supporting a concrete mold to rotate smoothly, thereby facilitating prompt dismantling work for the concrete mold.SOLUTION: A support jig 19 interposed between a support pipe and a floor surface has a pair of movable support members 21, 22 arranged vertically and provided with a pair of guide slope surfaces on right and left at internal locations that face each other. A pair of sliding members 26, 27 on right and left is inserted slidably between the movable support members 21, 22, the sliding members coming close to or being separated from each other when a horizontal bolt 30 is rotated. The movable support members 21, 22 move up and down to contract or elongate the movable support members, along with movement of the sliding members to bring the sliding members close to or away from each other. Specifically, the pair of sliding members 26, 27 on the right and left is separated from each other by rotating the horizontal bolt 30 at a time of dismantling, which in turn contracts a distance between the movable support members 21, 22 arranged in the vertical direction and lifts a self-load of a concrete structure from a support pipe 15, thereby allowing the concrete mold to be removed readily.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a support jig for a support pipe for a concrete formwork, and more particularly to a support jig for a support pipe for a concrete formwork used for a support work such as a ceiling slab in civil engineering / building work.

  FIG. 8 shows a conventional example in which a concrete formwork is supported using this type of support pipe. In the figure, reference numeral 1 denotes a formwork, in which concrete is placed to construct a ceiling slab 2 and a beam portion 3. The mold 1 is supported by a plurality of support pipes 5 erected on the floor surface 4. An upper portion of each support pipe 5 has a jack 7 having a screw portion and a handle 8 for rotating the jack 7. And are provided. By operating the handle 8, the jack 7 is rotated to set the upper end support portion 6 of the support pipe 5 to a desired height position, so that the mold 1 is supported with the required force. Installation work can be performed. In addition, a reinforcing bar (not shown) can be disposed in the concrete (see cited document 1).

No. 3069423 (FIG. 6)

The above prior art has the following problems. That is, when the mold is disassembled, the jack is turned by the handle to lower the upper end support portion (including the mounting table) of the support pipe to a predetermined position, and then the mold material is removed and disassembled. However, because the weight of the concrete structure acts eccentrically or locally on the screw part of the jack, the jack may not rotate smoothly. There was a problem that a great deal of labor and time was spent.
In addition, when the screw part of the jack does not turn easily, an operator hits the handle with a hammer etc. to forcefully turn the jack. In this case, not only does it cause a loud noise, but the screw part of the jack is There was a risk of destruction.

  Therefore, when disassembling the formwork, the jack of the concrete formwork support pipe rotates smoothly, and technical problems to be solved in order to enable the work of dismantling the formwork to be carried out easily and quickly arise. Therefore, an object of the present invention is to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is concrete used by being interposed between a lower end of a support pipe that supports a formwork and a floor surface. A support jig for a formwork support pipe, wherein the support jig includes a pair of upper and lower movable support members in which a pair of left and right guide slopes are formed on the inner sides facing each other, and between the pair of upper and lower movable support members. The pair of left and right slide members that engage with the guide slope are slidably inserted, and the pair of left and right slide members have a pair of left and right screw holes engraved on the same axis. A screw bolt that is screwed into and attached to one of the pair of left and right screw holes in the horizontal bolt, and a screw portion that is screwed into the other screw hole, Reverse screw relationship The pair of left and right slide members are separated or approached by the rotation of the horizontal bolt so that the pair of upper and lower movable support members are shortened or extended in the vertical direction. Provide support jig for support pipe for concrete formwork.

According to this configuration, one horizontal bolt is screwed and attached to the pair of left and right screw holes, the screw portion screwed into one of the pair of left and right screw holes in the horizontal bolt, and the other screw hole The screw parts to be screwed have a reverse screw relationship with each other. Therefore, when disassembling the formwork, if the horizontal bolt is rotated in one direction, the pair of left and right slide members are moved to the guide slope of the movable support member by the action of the left and right screw parts whose directions of screwing are opposite to each other. And move away from each other. For this reason, the pair of upper and lower movable support members move closer to each other.
As a result, the overall thickness of the support jig is shortened, so that the support pipe installed on the support jig moves downward, and the upper end support portion (including the mounting table) of the support pipe is molded. Separate from the lower surface of the frame.

According to a second aspect of the present invention, the pair of upper and lower movable support members are connected to the guide shaft or the movable support member via a pair of guide shafts for guiding the vertical movement of the movable support member so as to be shortened and extended. 2. The support jig for a concrete form support pipe according to claim 1, further comprising an elastic member that elastically urges the pair of upper and lower movable support members toward each other.
According to this configuration, the pair of upper and lower movable support members move while being guided in the vertical direction by the guide shaft during the vertical movement. At this time, even if an external force in the tilt direction acts on the movable support member, the external force is quickly absorbed and removed by the elastic member.

According to a third aspect of the present invention, a pair of upper and lower pin holes are formed on the inner side surfaces of the pair of upper and lower movable support members so as to face each other, and the vertical movement of the movable support member is performed in the pin holes. 3. A support jig for a concrete form support pipe according to claim 1, wherein a guide pin to be guided is slidably inserted.
According to this configuration, the pair of upper and lower movable support members move quickly while being smoothly guided in the vertical direction by the guide pins during movement.

According to the first aspect of the present invention, when the mold is disassembled after placing the concrete, the upper and lower dimensions of the support jig are shortened by rotating the horizontal bolt so that the upper end of the support pipe is separated from the mold. As a result, the dead weight of the concrete structure on the formwork does not act on the support pipe. Therefore, the worker can smoothly turn the jack of the support pipe with a lighter force than in the prior art, and can easily and quickly perform the removal work of the mold.
In this case, the worker does not need to hit the jack handle with a hammer or the like as in the prior art. Therefore, it is possible to perform the dismantling operation silently without causing noise, and there is no possibility of destroying the screw portion of the jack.
According to the second aspect of the present invention, the pair of upper and lower movable support members are guided along the axial direction of the guide shaft when moving up and down. In addition to the effect of the first aspect, the pair of upper and lower movable support members is supported. The member can be reliably and smoothly moved in the vertical direction. Furthermore, even if an external force in the tilt direction acts on the movable support member, the external force is instantaneously absorbed and removed by the elastic member, so that the movable support member can be reliably prevented from moving in an inclined manner.

  In the invention described in claim 3, since the pair of upper and lower movable support members move smoothly in the vertical direction along the pair of guide pins, in addition to the effect of the invention described in claim 1 or 2, There is an effect that the movable support member moves more smoothly while preventing the pair of movable support members from rattling.

Front explanatory drawing which shows one Example of this invention and shows the usage example of the support jig of the support pipe for concrete forms. The top view of the said support jig. The bottom view of the said support jig. FIG. 3 is a sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. It is CC sectional view taken on the line of FIG. 2, (a) shows a state when a pair of slide member approaches mutually. It is CC sectional view taken on the line of FIG. 2, Comprising: A state when a pair of slide member mutually spaces apart is shown. Front explanatory drawing which shows a prior art example and shows the usage example of the support pipe for concrete forms.

The present invention is a support jig for a concrete formwork support pipe that is used between a lower end of a support pipe that supports a formwork and a floor surface, and the support jig is provided on the inner side facing each other. A pair of upper and lower movable support members formed with a pair of left and right guide slopes are provided, and a pair of left and right slide members that engage with the guide slopes are slidably fitted between the pair of upper and lower movable support members. The pair of left and right slide members have a pair of left and right screw holes engraved on the same axis, and a pair of left and right screw holes are screwed into one horizontal bolt. The screw portion screwed into one of the pair of left and right screw holes and the screw portion screwed into the other screw hole are formed to have a reverse screw relationship with each other, and the pair of left and right screws are rotated by the rotation of the horizontal bolt. Slide By wood is separated or close together, were achieved by that is configured to reduce or extend the upper and lower pair of movable support members in the vertical direction.

A preferred embodiment of the present invention will be described below with reference to FIGS. In addition, although a present Example is applied to the concrete structure which has a ceiling slab and a beam part as a concrete structure, for example, a reinforced concrete overpass, if this invention is a concrete structure, it will be a civil engineering structure or a building structure. Can also be suitably implemented.
FIG. 1 shows an example of using a support jig for a concrete form support pipe according to this embodiment. In the figure, 11 is a formwork, and the formwork 11 constructs the ceiling slab 12 and the beam portion 13 by placing concrete. The mold 11 is supported by a support pipe 15, and the support pipe 15 is erected on the floor surface 14.
A jack 17 with a handle 18 having a threaded portion is provided at the upper end portion of the support pipe 15. By rotating the jack 17 with the handle 18, the jack 17 can be moved up and down and set to a desired height.
A support jig 19 according to the present invention is interposed between the lower end of the support pipe 15 and the floor surface 14. 2 to 7 show the structure of the support jig 19, FIG. 2 is a plan view, FIG. 3 is a bottom view, FIG. 4 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 6, 6 and 7 are sectional views taken along the line CC of FIG.
As shown in FIGS. 1 and 2, the support jig 19 includes a pair of upper and lower movable support members 21 and 22. In this embodiment, a metal material such as aluminum is adopted as the material of the movable support members 21 and 22. . The upper movable support member 21 and the lower movable support member 22 are arranged to face each other with a required vertical gap, and on both the left and right sides of the opposing surfaces of the pair of upper and lower movable support members 21 and 22, FIG. As shown in FIG. 2, guide slopes 23 and 23 and guide slopes 24 and 24 are formed, respectively.
The upper guide slopes 23, 23 are gradually inclined upward as they go from the left and right central portions of the upper movable support member 21 to the left and right ends. On the other hand, the lower guide slopes 24, 24 are gradually inclined downward from the left and right central portions of the lower movable support member 22 toward the left and right ends. Therefore, a pair of left and right space portions are formed on the left and right sides of the pair of upper and lower movable support members 21 and 22, and the pair of left and right space portions have a substantially wedge shape (laterally trapezoidal shape) in a front sectional view in the left and right direction. doing.
A pair of left and right slide members 26 and 27 having inclined surfaces on both upper and lower sides are slidably inserted into the pair of left and right space portions, and the slide members 26 and 27 are made of a metal material such as aluminum. . The front sectional shape in the left-right direction of the slide members 26 and 27 is formed in a substantially wedge shape corresponding to the space portion.
Therefore, the inclined surfaces of the pair of left and right slide members 26 and 27 are movably engaged with the guide inclined surfaces 23 and 24 of the movable support members 21 and 22, respectively. Further, screw holes 28 and 29 extending in the left-right direction are formed in the pair of left and right slide members 26 and 27, and the right screw hole 28 and the right screw hole 29 are on the same axis at the center of the slide members 26 and 27. Is provided. Further, a single horizontal bolt 30 is attached to the screw holes 28 and 29 of the slide members 26 and 27 so as to be rotatable. In addition, the screw portion screwed into one of the pair of left and right screw holes 28 in the horizontal bolt 30 and the screw portion screwed into the other screw hole 29 are formed so as to have a reverse screw relationship with each other. Yes. In the present embodiment, a washer-type stopper 31 is fixedly provided on the front end side of the thread portion of the horizontal bolt 30, and the stopper 31 abuts against the outer surface of the slide member 26, so that the slide member 26 with respect to the horizontal bolt 30 is provided. Movement is regulated.
As shown in FIGS. 2 and 3, a pair of front and rear recessed holes 32 and 32 and recessed holes 33 and 33 are provided in the center in the left-right direction of the pair of movable support members 21 and 22, respectively. A pair of front and rear guide shaft holes 34 and 34 and guide shaft holes 35 and 35 are formed on the bottom surfaces of the pair of front and rear concave holes 32 and 32 and the concave holes 33 and 33. 34, a pair of front and rear guide shafts 36, 36 are slidably fitted in the guide shaft holes 35, 35.
Both the upper and lower ends of the guide shafts 36 and 36 protrude from the guide shaft holes 34 and 34 by a predetermined dimension, and washers 25 and 25 are fixed to the protruding ends. Further, the guide shafts 36 and 36 are respectively provided with compression coil springs (elastic members) 37 and 37, and the compression coil springs 37 and 37 are disposed between the washers 25 and 25 and the bottom surfaces of the concave holes 32 and 33. . By the compression coil springs 37, 37, the upper end portion and the lower end portion of each guide shaft 36, 36 are elastically biased in the opposite directions away from each other.
For this reason, the guide shafts 36 and 36 are supported by an urging force of the compression coil springs 37 and 37 while maintaining an elastic balance at a predetermined vertical position. With this configuration, the pair of upper and lower movable support members 21 and 22 move in the vertical direction along with the horizontal movement of the pair of left and right slide members 26 and 27, and the entire pair of upper and lower movable support members 21 and 22 are shortened or extended. To do.
The pair of upper and lower movable support members 21 and 22 move in the vertical direction along the guide shafts 36 and 36 on both front and rear sides. At this time, the movable support members 21 and 22 are inclined by the compression coil springs 37 and 37. To keep it from moving.
Further, pin holes 39 and 39 and pin holes 40 and 40 are formed on the left and right sides of the opposing surfaces of the pair of upper and lower movable support members 21 and 22, respectively, as shown in FIG. The upper and lower ends of the guide pins 41 and 42 are slidably fitted into the pin holes 39 and 39 and the pin holes 40 and 40, respectively. Then, position fixing washers 43 and 43 and washers 44 and 44 are attached to the upper and lower ends of the guide pin 41 and the guide pin 42, respectively.
Therefore, when the movable support members 21 and 22 move along the guide shafts 36 and 36, the movable support members 21 and 22 move smoothly along the guide pins 41 and 42, and the movable support members 21 and 22 rattle. Can be prevented from occurring.
Next, a method for using the support jig 19 will be described. In this embodiment, a pair of left and right screw holes 28 and 29 are formed on the same axis in a pair of left and right slide members 26 and 27, and a single horizontal bolt 30 is provided in the pair of left and right screw holes 28 and 29. The screw portion that is screwed together and screwed into one of the pair of left and right screw holes 28 and 29 in the horizontal bolt 30 and the screw portion screwed into the other screw hole 28 and 29 are mutually reverse screws. The pair of left and right slide members 26 and 27 are separated or approached by the rotation of the horizontal bolt 30 so that the pair of upper and lower movable support members 21 and 22 are shortened or extended in the vertical direction. It is comprised so that it may do. With the above configuration, first, when placing concrete, the mold 11 is pushed up and supported by the upper end support portion of the support pipe 15, and the support jig 19 is interposed between the lower end of the support pipe 15 and the floor surface 14. The jack 17 is extended by operating the handle 18, and the mold 11 is pushed up to a predetermined height position. Next, the entire support jig 19 is set in an extended state by the following procedure.
That is, first, by rotating the horizontal bolt 30 in the clockwise direction with a spanner or the like, the action of the screw parts having a reverse screw relationship with each other, that is, the screwing direction acts in the opposite direction to each other. The slide member 26 and the slide member 27 move up and down in a direction approaching each other. As the pair of left and right slide members 26 and 27 approach, the guide slopes 23 and 24 of the movable support members 21 and 22 are gradually pushed up. As a result, the movable support members 21 and 22 are moved to the pair of front and rear guide shafts 36. , 36 in the direction of separating from each other, the length of the support pipe 15 is increased by that amount, and the support jig 19 is set in the extended state as shown in FIG.
Thus, the formwork 11 is pushed up and supported by the upper end support part of the support pipe 15, and in this state, the concrete placement of the ceiling slab 12 and the beam part 13 is performed. When a predetermined curing time elapses after placement, the ceiling slab 12 and the beam portion 13 are cured, and then the mold 11 is disassembled.
When the mold 11 is disassembled, since the gravity load of the ceiling slab 12 and the beam portion 13 acts on the support jig 19, it was not easy to disassemble the mold 11 in the prior art. By shortening the vertical dimension of the support jig 19 according to the following procedure, the work of disassembling the mold 11 can be performed efficiently.
That is, first, the horizontal bolt 30 is rotated by a spanner or the like in the counterclockwise direction, and as a result, a pair of left and right slide members as shown in FIG. 26 and 27 move horizontally between the pair of upper and lower guide slopes 23 and 24 in a direction away from each other.
Accordingly, the slopes of the slide members 26 and 27 move to the left and right sides along the guide slopes 23 and 24 of the pair of upper and lower movable support members 21 and 22. Therefore, the movable support members 21 and 22 move in the direction approaching each other along the guide shafts 36 and 36 on both the front and rear sides to shorten the vertical dimension of the support jig 19. Accordingly, the support pipe 15 moves downward by the shortened length of the support jig 19, and the mold 11 is disassembled in this state.
In this case, as the support pipe 15 is lowered, the upper end support portion of the support pipe 15 is separated from the lower surface of the mold 11, so that the self-weight load of the concrete structure on the mold 11 does not act on the support pipe 15. As a result, the jack 17 of the support pipe 15 can be easily turned by the handle 18 when the mold is disassembled, and the mold 11 can be easily and quickly removed.

As described above, according to the present invention, when the mold is disassembled, the pair of left and right slide members 26 and 27 are slid along the guide slopes 23 and 23 in the horizontal direction by rotating the horizontal bolt 30. Thus, the pair of upper and lower movable support members 21 and 22 approach each other and are shortened.
Thus, the vertical dimension of the support jig 19 is shortened as a whole, and the support pipe 15 on the support jig 19 moves downward by that amount, so that the upper end support portion of the support pipe 15 moves away from the mold 11. Accordingly, the self-weight load of the concrete structure does not act on the support pipe 15. Therefore, the jack 17 of the support pipe 15 can be smoothly rotated, and the mold 11 can be easily and quickly removed.
In this case, when the operator rotates the jack 17, it is not necessary to hit the handle 18 with a hammer or the like as in the conventional example. Therefore, no noise is generated and there is no possibility that the screw portion of the jack 17 is broken.
Further, the pair of upper and lower movable support members 21 and 22 can be reliably and smoothly moved in the vertical direction along the guide shafts 36 and 36 during the vertical movement. Furthermore, even if an external force in the tilt direction acts on the movable support members 21 and 22, the external force can be quickly absorbed and removed by the reaction force of the springs 37 and 37, so that the movable support members 21 and 22 are in an inclined state. Can be prevented in advance.
Furthermore, the pair of upper and lower movable support members 21 and 22 move smoothly in the vertical direction along the pair of guide pins 41 and 42. Therefore, it is possible to reliably prevent the pair of upper and lower movable support members 21 and 22 from rattling when moving.

The present invention is not limited to the contents of the above embodiments, and various modifications can be made without departing from the spirit of the present invention, and the present invention naturally extends to the modifications. It is.
For example, in the above embodiment, the female screw portions of the left screw hole and the right screw hole are engraved in opposite directions in order to move the slide member in the direction of separating and approaching each other by rotating the horizontal bolt. Accordingly, the slide member may be configured to move in a direction in which the slide member moves away from or approaches the elastic member.The elastic member that elastically urges the pair of upper and lower movable support members in the direction in which the slide member approaches each other is limited to the guide shaft. Alternatively, it can be mounted on a pair of upper and lower movable support members. Furthermore, a handle for turning operation can be attached to the horizontal bolt. Further, it is desirable that a buffer member is interposed between the support jig and the support pipe if necessary.

The supporting jig according to the present invention uses the supporting jig according to the present invention as long as the concrete structure is supported by a support pipe, regardless of whether the concrete structure is a civil engineering structure or a building structure. be able to.

11 Formwork 12 Ceiling slab 13 Beam part 14 Floor 15 Support pipe 16 Screw part 17 Jack 19 Support jigs 21, 22 Movable support members 26, 27 Slide member 30 Horizontal bolts 32, 33 Recessed hole 36 Guide shaft 37 Compression coil spring (elasticity Element)
39, 40 Pin hole 41, 42 Guide pin

Claims (3)

A support jig for a support pipe for a concrete formwork that is used between the lower end of the support pipe that supports the formwork and the floor surface,
The support jig includes a pair of upper and lower movable support members in which a pair of left and right guide slopes are formed on the inner sides facing each other, and a pair of left and right slides that engage the guide slopes between the pair of upper and lower movable support members. The member is slidably inserted,
The pair of left and right slide members are engraved with a pair of left and right screw holes on the same axis, and a pair of left and right screw holes are fitted with a single horizontal bolt,
The screw portion screwed into one of the pair of left and right screw holes in the horizontal bolt and the screw portion screwed into the other screw hole are formed to have a reverse screw relationship with each other,
A support pipe for a concrete formwork configured such that a pair of upper and lower movable support members is shortened or extended in the vertical direction when the pair of left and right slide members are separated or approached by the rotation of the horizontal bolt. Support jig. The pair of upper and lower movable support members are connected so as to be shortenable and extendable via a pair of guide shafts that guide the vertical movement of the movable support member.
2. The concrete mold according to claim 1, wherein the guide shaft or the pair of upper and lower movable support members is provided with an elastic member that elastically urges the pair of upper and lower movable support members toward each other. Support jig for frame support pipe. A pair of upper and lower pin holes are perforated on the inner side surfaces of the pair of upper and lower movable support members, and a guide pin that guides the vertical movement of the movable support member is slidable in the pin holes. The support jig for a support pipe for a concrete mold according to claim 1 or 2, wherein the support jig is inserted into the support pipe.

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