JPH059127Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is used in concrete pile manufacturing lines to move a pair of upper and lower split formworks into and out of a steam curing chamber while still being assembled as one body before demolding. This invention relates to a suspension and transfer device for suspending and transferring formwork in a vertically separated form for handling during demolding and after demolding.

[Conventional technology]

Generally, in the production line of concrete piles, the process of demolding the formwork and the process after demolding are as follows:
A formwork suspension and transfer device is used as a means for cleaning the separated upper and lower formworks and transporting them again to the concrete input line.

In addition, as a conventional transfer device of this type,
A lifting beam suspended by a crane is equipped with a clamping tool for suspending the upper mold in the upper and lower split form frames, and a lifting arm for suspending the lower mold. It is known that the upper and lower formworks can be separately suspended and transported in an open state using a holding arm (Japanese Patent Publication No. 38857/1983).

[Problems that ideas should solve]

By the way, in the production line for concrete piles, as a step before demolding after centrifugal force forming, the concrete piles are stored in the formwork one after another in a steam curing chamber and stacked, and are steam-cured for about a day and night. . Therefore, in this curing process, the concrete piles after forming from the centrifugal force forming machine are carried into the curing chamber as they are, or after curing, the formwork is taken out one by one from the curing chamber and then removed. In order to carry it out to the mold process line, a lifting and transporting device is required that grasps only the upper mold in the formwork in which the upper and lower split formworks are connected together and lifts or lowers it with a crane.

In this case, in the demolding step which is the next step after this curing step, the above-mentioned conventional technique is used in which the split mold frame can be opened up and down and the upper mold and the lower mold can be suspended respectively. Since the type of suspension and transfer device described in the above section is installed, if the formwork suspension and transfer device used in this demolding process can also be used in the curing process, it will be possible to manufacture concrete piles. One formwork suspension and transfer device is sufficient for the line.

However, in this lifting and transferring device used in this demolding process line, the hanging arms for suspending both sides of the lower mold extend below the clamping tools for suspending the tire of the upper mold. In order to prevent It is not possible to grab it and carry it into the curing chamber, or to drop the formwork you are gripping into the curing chamber. Also, when lifting the formwork one by one from the curing room and transferring it to the demolding process line after the curing process is completed, the lifting arms must be left wide open to the left and right, otherwise the clamps for lifting the upper molds will be removed. If the tool cannot grasp the upper mold of the formwork and the hanging arm is wide open, the hanging arm will hit the side wall of the curing room, causing the upper mold of the formwork located on the wall side of the room to There is a problem in that it cannot be grasped with a clamp.

For this reason, conventionally, in order to transport the formwork that has completed the centrifugal force forming process into and out of the steam curing chamber, the upper and lower split formwork used in the demolding process must be suspended and transferred. In addition to the equipment, a separate transfer device is required that can grasp and suspend only the upper mold of the formwork before the upper and lower formworks are separated.
Not only does this require additional equipment costs, but it also creates waste in that while one crane is in use, the other crane is idle.

[Means to solve the problem]

The present invention solves the problems of the conventional formwork suspension and transfer device as described above, and improves the transfer device for separately suspending the upper and lower split formworks used in the demolding process line. In particular, it can also be used for the purpose of carrying the mold into and out of the curing chamber by grasping only the upper mold during the curing process.

As a specific means for achieving the above object, the present invention provides a clamping tool for suspending the upper tire in a pair of upper and lower split formworks, and a lower In a concrete pile formwork lifting and transferring device equipped with lifting arms for suspending flanges on both sides of the mold, the upper ends of the pair of lifting arms placed across the lifting beam are connected to the upper end of the lifting beam. The lower surfaces of the support blocks are attached to the support blocks disposed in the vertical direction through shafts parallel to the length direction of the lifting beams and meshing gears on the shafts so as to be rotatable in synch with each other. The tip of the piston rod of a hydraulic cylinder is rotatably mounted on the upper surface of the lift beam through an axis perpendicular to the length direction of the support block, and is arranged on the lift beam on the side of the support block. It is characterized by being connected to.

[Effect]

This device is installed on the line from the centrifugal force forming machine to the curing chamber to the demolding processing section, and when the formwork is carried into the curing chamber after the centrifugal force forming process, A suspension arm for grasping the vertically hanging lower mold used in the next demolding process is suspended around the axis between the support block to which the upper end of the suspension arm is attached and the lifting beam. The lower end of the holding arm is rotated to a position where it is lifted above the upper die lifting clamp. When the suspension arm is placed in a position where its lower end is rotated upwards, there is nothing on the underside of the clamp that grips the upper mold that will get in the way when suspending or lifting the mold. , the formwork can be carried in and out of the curing room without any hindrance.

On the other hand, when this device is used in the demolding process, the upwardly rotated posture of the suspension arm support block is returned to its original correct position, that is, with the lower end of the suspension arm below the upper die clamping tool, and The flanges on both sides of the mold are returned to their original positions where they can be grasped, and the upper mold is used with the clamps, and the lower mold is suspended with the hanging arms.

〔Example〕

Next, an embodiment of the formwork suspension and transfer device according to the present invention will be described with reference to the drawings. FIG. 1 is a front view;
Reference numeral 1 denotes an elevating beam, 2 a formwork consisting of an upper mold 2a and a lower mold 2b, and the elevating beam 1 has a clamping tool 4 for suspending the upper mold 2a via the tires 3 of the formwork 2.
and a suspension arm 6 for suspending the lower mold 2b via flanges 5 on both sides. This lifting beam 1 is the fourth
As shown in the figure, it is suspended via a wire 8 so that it can be raised and lowered from a crane 7 that moves on a line from centrifugal force forming process A to steam curing process B to demolding process C.

Clamping tool 4 for suspending the upper mold 2a of the formwork 2
As shown in FIGS. 1 and 2, the brackets 9 are suspended from the brackets 9 provided on the lower surface of the lifting beam 1 via a pair of shafts 10 oriented perpendicularly to the length direction of the lifting beam 1. It consists of a pair of clamping pieces 11.
These clamping pieces 11 are attached to the tire 3 of the formwork 2 at the lower end.
It has a pair of claws 12 facing each other for gripping, and a pair of gears 13 that mesh on the shaft 10. Also, one of the clamping pieces 1
The upper end of 1 is connected via an arm 15 to a connecting rod 14 arranged along the length of the beam on the lower surface of the lifting beam 1, and the connecting rod 14 is attached to the lower surface of the lifting beam 1. By being actuated by a hydraulic cylinder 16, the pair of clamping pieces 11 can grip and release the tire 3 via the gear 13 in synchronization.

On the other hand, a suspension arm 6 for suspending the lower mold 2b of the formwork 2 is provided on the lifting beam 1 apart from the clamping tool 4. The suspension arm 6 is made up of a pair of arms 17 arranged to sandwich the lifting beam 1 from the front and back. Beam 1
It is suspended via a pair of shafts 19 that are parallel to the length direction. At the lower ends of these arms 17, formwork 2
It has a pair of claws 20 facing each other for gripping the flanges 5 on both sides of the lower mold 2b, and
The upper end has a pair of gears 21 that mesh on the shaft 19. Further, a hydraulic cylinder 22 is protruded upward from the upper end of the support block 18, and a bar 22 is provided at the tip of a piston rod 23.
Both ends of 4 and the upper ends of both arms 17 are connected to each other 2
5, and the hydraulic cylinder 2
2 is activated, the arms 17 can simultaneously grip and release the flange 5 of the lower die 2b via the gear 21.

Furthermore, the support block 18 that pivotally supports the upper end of the suspension arm 6 has a bearing 26 provided on the lower surface and a bearing 27 provided on the upper surface of the lifting beam 1, such that the shaft is oriented perpendicular to the length direction of the lifting beam 1. 28, and the tip of a piston rod 30 of a hydraulic cylinder 29 disposed on the lifting beam 1 on the side of the support block 18 is connected to one side of the support block 18. , when the hydraulic cylinder 29 is actuated, the support block 18 is moved to the shaft 28.
It is designed to rotate around .

As shown in FIG. 3, the mold 2 that has been molded in the centrifugal force forming step A is carried into the steam curing chamber 31 in the curing step B, or the mold 2 that has been cured is moved from the curing chamber 31 to the adjacent steam curing chamber 31. When carrying out to the demolding process C, the piston rod 30 of the hydraulic cylinder 29 on the lifting beam 1 is pushed out, and the support block 18 of the suspension arm 6 is rotated about the shaft 28. It is tilted so that the lower end is located above the clamp 4 attached to the lower surface of the lifting beam 1. At this time, both arms 17 operate the hydraulic cylinder 22 at the upper end to close them as shown by the chain line in FIG. , Since there are no obstacles to gripping the tire 3 of the formwork 2 with the clamping tool 4, the tire 3 of the formwork 2 is grabbed with the clamping tool 4 and moved into the curing chamber 31 by the crane 7. can be brought in or taken out freely.

On the other hand, when the formwork 2 carried out from the curing chamber 31 is placed on the line for the demolding process C, the connection state between the upper mold 2a and the lower mold 2b at the flange 5 is released, and the hanging arm 6 is opened as described above. The lifting beam 1 is temporarily raised by suspending only the upper mold 2a by the clamping tool 4 while keeping it rotated upward. This allows the upper mold 2
Since part a is first removed from the mold, the concrete pile is then removed from the lower mold 2b using a vacuum cleaner. After the concrete pile has been demolded, the piston rod 30 of the hydraulic cylinder 29 on the top surface of the lifting beam is retracted while the lifting arm 6 is kept open, and the lifting arm support block 8 is set so that the lifting arm 6 is vertical. Then, the hanging arm 6 is closed and the claw 20 at the lower end is engaged with the lower surface of the lower mold 2b as shown in FIG. Therefore, if the lifting beam 1 is raised in this state, the upper mold 2a
Since the lower mold 2b is suspended by the clamping tool 4 and the lower mold 2b is suspended by the hanging arm 6, both formwork pieces can be transferred as they are to the next process of applying a release agent and pouring concrete.

〔effect〕

As described above, in the formwork suspension and transfer device according to the present invention, the suspension arm for suspending the lower mold of the formwork is attached so as to be rotatable with respect to the lifting beam. When carrying the formwork after centrifugal force forming into the steam curing chamber or out of the room, the formwork can be suspended using only the clamping tool that grips the upper mold. Therefore, this eliminates the waste of conventionally requiring separate means for lifting and transporting formwork for the curing process and demolding process, allowing work to be carried out efficiently by using a single lifting and transporting device, and reducing equipment costs. A reduction in costs can be expected.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the configuration of the formwork suspension and transfer device according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a view showing the formwork suspended by only the clamps. Figure 4, a partial front view showing the state, is a side view of a concrete pile manufacturing line using this device. 1... Elevating beam, 2... Formwork, 2a... Upper mold, 2
b... lower mold, 3... tire, 4... clamping tool, 5...
... lower mold flange, 6 ... suspension arm, 9 ... bracket, 11 ... clamping piece, 13, 21 ... synchronized rotation gear, 14 ... linking rod, 17 ... arm, 18 ... support block, 19, 28...Shaft, 22, 29...Hydraulic cylinder, 31...Steam curing chamber.

Claims (1)

[Scope of utility model registration request] A lifting beam that moves up and down in a horizontal state is equipped with a clamping tool for suspending the upper mold tire in a pair of upper and lower split formworks, and a lifting arm for suspending both side flanges of the lower mold. In the concrete pile formwork suspension and transfer device, the upper ends of the pair of suspension arms placed on both sides of the lifting beam are attached to support blocks placed at the top of the lifting beam, respectively, in the longitudinal direction of the lifting beam. The supporting blocks are pivotally connected to each other through parallel shafts and meshing gears on the shafts so as to be rotatable in synch with each other, and the lower surface of the support block is connected to the upper surface of the lifting beam through an axis perpendicular to the longitudinal direction of the lifting beam. Formwork suspension for concrete piles, characterized in that the piston rod tip of a hydraulic cylinder is rotatably pivoted and arranged on a lifting beam on the side of the support block, and the tip of the piston rod is connected to the side end of the support block. Transfer device.