JP6831101B2 - Formwork fixing structure - Google Patents

Description

The present invention relates to a formwork for manufacturing a concrete product such as a concrete slab, and more specifically, to a formwork fixing structure in which a base frame and a side frame are combined and fixed at right angles.

Regarding this type of formwork, for example, Patent Document 1 discloses a method of fixing a base frame and a side frame in combination. In the configuration described in Patent Document 1, the base frame and the side frame can be fixed by engaging the tip of the arm that is rotatable up and down with the pressing shaft. In addition, an adjustable stopper is provided to keep the base frame and the side frame perpendicular to each other.

According to such a configuration, it is possible to easily assemble and disassemble the mold, and the base frame and the side frame can be combined and fixed at right angles.

Japanese Unexamined Patent Publication No. 2000-317926

However, in the configuration described in Patent Document 1 described above, there is a problem that a load is applied to the legs and waist when the arm is rotated up and down. In addition, when adjusting the fastening force and standing angle of the side frame, the fastening force of the arm and the height of the stopper must be finely adjusted (mutually finely adjusted at multiple points viewed in the longitudinal direction of the side frame). (Because it has to be done), the adjustment work may be complicated.

Therefore, a first object of the present invention is to provide a formwork fixing structure capable of reducing the burden on the legs and waist during mold assembly and mold disassembly.
A second object of the present invention is to provide a formwork fixing structure capable of easily adjusting the standing angle of the side frame.

The present invention has been made to solve the above-mentioned problems, and is characterized by the following.
The invention according to claim 1 is a mold fixing structure in which a base frame and a side frame are combined and fixed at right angles, and the base frame is a mold having a substantially horizontal concrete filling surface to be filled with concrete. A part of the support surface that is substantially perpendicular to the end of the concrete filling surface, and a base portion that lifts the base frame and supports it from below is provided at the lower part of the base frame, and the side frame is provided. Provided a bottom plate portion and a side plate portion arranged substantially vertically on the bottom plate portion, and by pressing the bottom plate portion of the side frame against the support surface of the base frame, the side frame and the base frame To hold the support bar on the base of the base frame, and a support bar that hangs down substantially vertically is fixed to the bottom of the side frame. The holding mechanism is formed so as to project in the horizontal direction, and the holding mechanism includes a lock member that can rotate in the horizontal direction, and by rotating the lock member, the intermediate portion of the support bar can be sandwiched and held. A pressing member is attached to the support bar below the intermediate portion, and the pressing member is attached to the base frame when the holding mechanism sandwiches and holds the intermediate portion of the support bar. It is configured to come into contact with the receiving portion provided on the base portion of the .

The invention according to claim 2 is provided with an operation bar that can be attached to and detached from the lock member in addition to the feature of the invention according to claim 1, and the operation bar is used when the lock member is rotated. It is characterized by playing the role of a rock.

Invention according to claim 3, adjusting the angle of the support bars by addition to feature points of the invention described in claim 1 or 2 described above, to adjust the protruding amount of the pressing member for the previous SL support bar It is characterized in that it is provided with an angle adjusting unit.

The invention according to claim 4 is provided with a fastening force adjusting unit for adjusting the amount of protrusion of the holding mechanism with respect to the base frame, in addition to the feature points of the invention according to any one of claims 1 to 3. It is a feature.

The invention according to claim 1 is as described above, and includes and holds a support bar that is fixed to a side frame and hangs down, and a holding mechanism that is formed so as to project horizontally from the base frame and can hold the support bar. The mechanism includes a lock member that can rotate in the horizontal direction, and the support bar can be sandwiched and held by rotating the lock member. According to such a configuration, the lock member can be assembled and disassembled by rotating the lock member in the horizontal direction, so that there is no need to crouch down or bend and stretch the knee. Therefore, as compared with the conventional structure in which the arm is rotated up and down, it is possible to reduce the load on the legs and waist when assembling and disassembling the mold.

In the case of a structure in which the arm is rotated up and down as in the conventional case, the arm may fall on the foot, knee, etc., but in the case of the structure in which the lock member is rotated in the horizontal direction as in the present invention. , No need to worry about that.

Further, the invention according to claim 2 is as described above, wherein the lock member is provided with a detachable operation bar, and the operation bar acts as a lever when rotating the lock member. According to such a configuration, the operation load when rotating the lock member can be reduced by using the operation bar, so that the work load can be reduced.

Further, the invention according to claim 3 is as described above, and includes an angle adjusting unit for adjusting the angle of the support bar by adjusting the amount of protrusion of the pressing member with respect to the support bar. According to such a configuration, the standing angle of the side frame can be adjusted by using the angle adjusting unit. At this time, since the angle adjusting portion and the holding mechanism are provided along the support bar and are at the same position on the top and bottom, the mold assembly and the standing angle can be adjusted at one place. Moreover, since the angle of the support bar may be vertical, it is easy to check the standing angle of the side frame. Therefore, the work of adjusting the standing angle of the side frame can be easily performed.

Further, the invention according to claim 4 is as described above, and includes a fastening force adjusting unit for adjusting the amount of protrusion of the holding mechanism with respect to the base frame. According to such a configuration, the fastening force adjusting unit can be used to adjust the fastening force of the side frame. Since the fastening force adjusting portion is also arranged near the support bar in the same manner as the angle adjusting portion and the holding mechanism, the fastening force can be adjusted and the standing angle can be adjusted at one place. Therefore, even if the standing angle of the side frame is changed by changing the fastening force, the adjustment work can be easily performed.

It is a side view of the formwork fixing structure after the formwork. It is a side view of the formwork fixing structure before the formwork. It is a view from the top which the lock member rotates, (a) the figure in the locked state, and (b) the figure in the state where the lock is released. It is (a) plan view and (b) front view of the lock member. It is the figure which looked at the angle adjustment part from the top, (a) the figure which the protruding amount of a pressing member is large, (b) the figure which is the state which the protruding amount of a pressing member is small. It is the figure which looked at the fastening force adjusting part from the top, (a) the figure in the state where the protruding amount of the holding mechanism is large, and (b) the figure in the state where the protruding amount of the holding mechanism is small.

An embodiment of the present invention will be described with reference to the drawings.
The formwork fixing structure according to the present embodiment relates to a formwork for manufacturing a concrete product such as a concrete slab, and as shown in FIG. 1, the base frame 10 and the side frame 30 are fixed in combination at right angles. It is designed to do. When manufacturing a concrete product, the side frame 30 is joined and fixed to the peripheral edge of the base frame 10 to form a mold, and the inside of the formwork thus assembled is filled with concrete. Then, when the filled concrete is hardened, the side frame 30 is separated from the base frame 10 and the concrete product is taken out.

Although not particularly shown, the combination of the base frame 10 and the side frame 30 can be freely set. For example, the side frame 30 may be slid horizontally and pressed from the side of the base frame 10. Alternatively, the side frame 30 may be configured to be rotatable with respect to the base frame 10 via a hinge or the like, and the side frame 30 may be rotated to come into contact with the base frame 10. Note that FIG. 2 showing the separated state of the base frame 10 and the side frame 30 does not show the actual positional relationship between the base frame 10 and the side frame 30. That is, in the case of the slide method, the base frame 10 and the side frame 30 are separated or joined in the horizontal direction, and in the case of the rotation method, the base frame 10 and the side frame 30 are rotated and separated in the vertical direction. Or it will be joined.

The base frame 10 is a part of a formwork having a substantially horizontal concrete filling surface 10c filled with concrete, and includes a supporting surface 10a substantially perpendicular to the end portion of the concrete filling surface 10c. When the mold is assembled, the side frame 30 described later is pressed against the support surface 10a. The support surface 10a does not have to be flat, and may be, for example, R-shaped or C-surface processed. Further, a base portion 10b is provided below the base frame 10, and the base frame 10 is lifted and supported from below. A bolt holding portion 11 and a receiving portion 28 are fixed to the base portion 10b by welding or the like.

The bolt holding portion 11 is a portion for holding the hinge bolt 12. The hinge bolt 12 has a head portion 12a formed in a ring shape, and the ring-shaped head portion 12a is sandwiched between the bolt holding portions 11 so as to penetrate the bolt holding portion 11 and the ring-shaped head portion 12a. The hinge bolt 12 is fixed to the bolt holding portion 11 by attaching the fixing pin 14. The shaft portion 12b of the hinge bolt 12 is provided so as to project in the horizontal direction so as to project from the support surface 10a. Then, as shown in FIG. 3 and the like, a holding mechanism 15 is attached to the shaft portion 12b of the hinge bolt 12.

The holding mechanism 15 is for holding the support bar 32, which will be described later, and is formed so as to project horizontally from the base frame 10 by being attached to the shaft portion 12b of the hinge bolt 12. By holding the support bar 32 by the holding mechanism 15, the base frame 10 and the side frame 30 can be combined and fixed at right angles. The holding mechanism 15 includes a holding base member 16 fixed to the hinge bolt 12 and a lock member 20 rotatably attached to the holding base member 16.

The holding base member 16 includes a pipe portion 17 configured to allow the shaft portion 12b of the hinge bolt 12 to penetrate, an arm portion 18 extending in the tip direction from the pipe portion 17, and rotation provided at the tip of the arm portion 18. A shaft 19 is provided.

The pipe portion 17 is provided for attaching the holding base member 16 to the hinge bolt 12. The shaft portion 12b of the hinge bolt 12 penetrates the pipe portion 17, and the position is fixed by the fastening force adjusting nuts 13a screwed on both sides of the pipe portion 17. The fastening force adjusting nut 13a constitutes a fastening force adjusting portion 13 that adjusts the amount of protrusion of the holding mechanism 15 with respect to the base frame 10. By changing the tightening position of the fastening force adjusting nut 13a, the holding mechanism 15 (holding base) The position of the member 16) can be adjusted.

That is, as shown in FIG. 6, if the fastening force adjusting nut 13a is rotated and moved along the shaft portion 12b of the hinge bolt 12, the pipe portion 17 can be moved along the shaft portion 12b of the hinge bolt 12. As a result, the position of the holding mechanism 15 (holding base member 16) can be changed. Specifically, if the amount of protrusion of the holding mechanism 15 is increased as shown in FIG. 6A, the holding mechanism 15 is separated from the base frame 10, so that the holding mechanism 15 sets the side frame 30 to the base frame. The force of pulling in the direction of 10 can be reduced. Further, if the protrusion amount of the holding mechanism 15 is reduced as shown in FIG. 6B, the holding mechanism 15 becomes closer to the base frame 10, so that the holding mechanism 15 pulls the side frame 30 toward the base frame 10. Can be increased.

The lock member 20 is rotatably connected to the holding base member 16 via a rotation shaft 19. Since the rotation shaft 19 is substantially vertical, the lock member 20 can rotate in the horizontal direction. By rotating the lock member 20, the support bar 32, which will be described later, can be sandwiched and held.

As shown in FIG. 4, the lock member 20 has a rotation shaft hole 21 for penetrating the rotation shaft 19, a hook 22 for engaging with a support bar 32 described later, and an operation bar 24 described later. A bar mounting portion 23 for mounting is provided.

As shown in FIG. 4A, the hook 22 has a substantially semicircular inner peripheral surface for hooking the support bar 32. When the lock member 20 is rotated with respect to the holding base member 16 in the closing direction, the inside of the hook 22 can hold the support bar 32 along the peripheral surface of the support bar 32 as shown in FIG. 3A. It has become. In the state of being held in this way, even if a force for pulling the base frame 10 and the side frame 30 is generated (in other words, even if a force for pushing the support bar 32 to the right is generated in FIG. 1), The lock member 20 is configured so as not to rotate. Therefore, the holding of the support bar 32 by the holding mechanism 15 is not released unless the lock member 20 is intentionally rotated. Moreover, as shown in FIG. 4A, the hook 22 is doubly formed by two parallel plates, and the support bar 32 can be held by the two hooks 22. Therefore, a large contact area between the hook 22 and the support bar 32 is secured, and the support bar 32 can be reliably held.

Further, the bar mounting portion 23 is for facilitating the rotation of the lock member 20, and as shown in FIG. 4, has a tubular shape provided perpendicular to the axial direction of the rotating shaft hole 21. It is a part. An operation bar 24 as shown in FIG. 3 can be attached to the bar attachment portion 23. The operation bar 24 is a rod-shaped member that can be attached to and detached from the lock member 20, and serves as a lever when the lock member 20 is rotated. The operation bar 24 according to the present embodiment includes an insertion portion 24a that can be inserted into the bar attachment portion 23, and a grip portion 24b that is formed to have a diameter larger than that of the insertion portion 24a. When using this operation bar 24, as shown in FIG. 3, if the insertion portion 24a is inserted into the bar mounting portion 23, the grip portion 24b is held by hand and a force is applied, the lock member 20 can be easily applied with a small force. Can be rotated. If the operation bar 24 is removed after rotating the lock member 20, the holding mechanism 15 can be kept compact and the operation bar 24 does not get in the way.

By rotating the lock member 20 in this way, the support bar 32 can be clamped and the side frame 30 can be fixed to the base frame 10.

The receiving portion 28 is a columnar portion provided so as to project horizontally from the base portion 10b of the base frame 10, and is arranged below the bolt holding portion 11. The receiving portion 28 is for receiving the pressing member 33, which will be described later. A through hole 28a may be provided in the receiving portion 28 so that the bolt fixing pin 14 can pass through.

The side frame 30 is a part of the formwork, and includes a bottom plate portion 31 arranged substantially horizontally and a side plate portion 35 arranged substantially vertically. A packing groove 31b is provided at the end of the bottom plate portion 31, and the side frame 30 and the base frame 10 are at right angles to each other by mounting the packing in the packing groove 31b and pressing the packing against the support surface 10a of the base frame 10. It is designed to be combined with. A support bar 32 is fixed to the side frame 30 and hangs substantially vertically. Specifically, it is fixed to the bar holding portion 31a of the bottom plate portion 31 by welding or the like.

The support bar 32 is a columnar member as shown in FIG. 2 and the like, and as described above, the holding mechanism 15 holds the intermediate portion. A pressing member 33 is attached below the intermediate portion held by the holding mechanism 15.

The pressing member 33 is a rod-shaped member provided substantially horizontally so as to abut the receiving portion 28 of the base frame 10. The pressing member 33 includes a shaft portion 33b threaded in a bolt shape and a contact portion 33a fixed to the tip of the shaft portion 33b. As shown in FIG. 5, the shaft portion 33b is attached so as to penetrate the support bar 32 so as to be orthogonal to the support bar 32. Further, angle adjusting nuts 34a are attached to both sides of the support bar 32 so as to sandwich the support bar 32 on the shaft portion 33b. The angle adjusting nut 34a constitutes an angle adjusting portion 34 that adjusts the angle of the support bar 32 by adjusting the amount of protrusion of the pressing member 33 with respect to the support bar 32, and changes the position where the angle adjusting nut 34a is tightened. As a result, the angle of the support bar 32 can be adjusted, and the standing angle of the side frame 30 can be adjusted.

That is, as shown in FIG. 5, when the angle adjusting nut 34a is rotated, the relative position of the angle adjusting nut 34a with respect to the shaft portion 33b of the pressing member 33 moves, so that the support bar 32 and the pressing member 33 come together. The relative position moves. As a result, the amount of protrusion of the pressing member 33 changes. In this way, as the amount of protrusion of the pressing member 33 changes, the amount of the contact portion 33a pushing the receiving portion 28 changes, so that the angle of the support bar 32 changes. Then, as the angle of the support bar 32 changes, the standing angle of the side frame 30 also changes. Specifically, when adjusting the standing angle of the side frame 30, the fastening force adjusting portion 13 is adjusted so that a sufficient fastening force can be obtained by the holding mechanism 15, so that the support bar 32 is vertical in this state. By adjusting the angle adjusting unit 34, the side frame 30 can be adjusted perpendicularly to the base frame 10.

As described above, according to the present embodiment, the support bar 32 which is fixed to the side frame 30 and hangs down, and the holding mechanism 15 which is formed so as to project horizontally from the base frame 10 and can hold the support bar 32. The holding mechanism 15 includes a lock member 20 that can rotate in the horizontal direction, and the support bar 32 can be sandwiched and held by rotating the lock member 20. According to such a configuration, the lock member 20 can be assembled and disassembled by rotating the lock member 20 in the horizontal direction, so that there is no need for crouching work or knee bending / stretching operation. Therefore, as compared with the conventional structure in which the arm is rotated up and down, it is possible to reduce the load on the legs and waist when assembling and disassembling the mold.

In the case of the conventional structure in which the arm is rotated up and down, the arm may fall on the legs, knees, etc., but the lock member 20 is rotated in the horizontal direction as in the present embodiment. In the case of, such a worry is unnecessary.

Further, the lock member 20 is provided with a detachable operation bar 24, and the operation bar 24 serves as a lever when the lock member 20 is rotated. According to such a configuration, the operating load when rotating the lock member 20 can be reduced by using the operating bar 24, so that the work load can be reduced.

Further, an angle adjusting unit 34 for adjusting the angle of the support bar 32 by adjusting the amount of protrusion of the pressing member 33 with respect to the support bar 32 is provided. According to such a configuration, the standing angle of the side frame 30 can be adjusted by using the angle adjusting unit 34. At this time, since the angle adjusting portion 34 and the holding mechanism 15 are provided along the support bar 32 and are located at the same position on the top and bottom, the mold assembly and the standing angle can be adjusted at one place. Moreover, since the angle of the support bar 32 may be vertical, it is easy to confirm the standing angle of the side frame 30. Therefore, the work of adjusting the standing angle of the side frame 30 can be easily performed.

Further, a fastening force adjusting unit 13 for adjusting the amount of protrusion of the holding mechanism 15 with respect to the base frame 10 is provided. According to such a configuration, the fastening force adjusting unit 13 can be used to adjust the fastening force of the side frame 30. Since the fastening force adjusting unit 13 is also arranged near the support bar 32 like the angle adjusting unit 34 and the holding mechanism 15, the fastening force can be adjusted and the standing angle can be adjusted at one place. it can. Therefore, even if the standing angle of the side frame 30 is changed by changing the fastening force, the adjustment work can be easily performed.

10 Base frame 10a Support surface 10b Base part 10c Concrete filling surface 11 Bolt holding part 12 Hinge bolt 12a Head 12b Shaft part 13 Fastening force adjusting part 13a Fastening force adjusting nut 14 Bolt fixing pin 15 Holding mechanism 16 Holding base member 17 Pipe part 18 Arm part 19 Rotating shaft 20 Lock member 21 Rotating shaft hole 22 Hook 23 Bar mounting part 24 Operation bar 24a Inserting part 24b Gripping part 28 Receiving part 28a Through hole 30 Side frame 31 Bottom board part 31a Bar holding part 31b Packing groove 32 Support bar 33 Pressing member 33a Contact part 33b Shaft part 34 Angle adjustment part 34a Angle adjustment nut 35 Side plate part

Claims (4)

It is a formwork fixing structure that fixes the base frame and side frame in combination at right angles.
The base frame is a part of a formwork having a substantially horizontal concrete filling surface filled with concrete, and has a supporting surface substantially perpendicular to the end of the concrete filling surface.
At the lower part of the base frame, a base portion for lifting the base frame and supporting it from below is provided.
The side frame includes a bottom plate portion and a side plate portion that is arranged substantially vertically on the bottom plate portion.
By pressing the bottom plate portion of the side frame against the support surface of the base frame, the side frame and the base frame can be combined at right angles.
A support bar hanging substantially vertically is fixed to the bottom of the side frame.
A holding mechanism for holding the support bar is formed so as to project horizontally on the base of the base frame.
The holding mechanism includes a lock member that can rotate in the horizontal direction, and by rotating the lock member, the intermediate portion of the support bar can be sandwiched and held.
A pressing member is attached to the support bar below the intermediate portion.
The pressing member has a formwork fixing structure that is configured to abut the receiving portion provided on the base portion of the base frame when the holding mechanism sandwiches and holds the intermediate portion of the support bar. .. The lock member is provided with a removable operation bar.
The formwork fixing structure according to claim 1, wherein the operation bar acts as a lever when rotating the lock member. Characterized in that it comprises an angle adjustment unit for adjusting the angle of the support bar by adjusting the projecting amount of the pressing member for the previous SL support bar, according to claim 1 or 2 mold fixing structure according. The mold fixing structure according to any one of claims 1 to 3, further comprising a fastening force adjusting portion for adjusting the amount of protrusion of the holding mechanism with respect to the base frame.

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