JPH06293016A - Releaser applicator for cylindrical form - Google Patents

Abstract

PURPOSE:To provide a device applying a releaser as the internal surface of the top force of cylindrical forms is left as it is directed downward without inverting the top force. CONSTITUTION:A rail 23 for travelling is disposed in parallel with top forces A carried to the lower rank of a conveyor for carrying forms carrying a plurality of the top forces A installed in parallel, and a releaser ejector 24 with a nozzle 31 for ejecting a releaser is arranged onto the rail 23 for travelling in a freely travelling manner. A part of a conveyor for carrying the forms positioned in the upper rank of the rail 23 for travelling is rotated downward for ensuring a space, in which the nozzle 31 for ejecting the releaser is passed, and the nozzle 31 can cross the conveyor for carrying the forms in the conveyor for carrying the forms positioned in the upper rank, and the releaser is applied while the releaser ejector 24 is made to travel along the overall length of the top force A and the releaser is ejected toward the internal surface of the top force A from the nozzle 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertically-separable cylindrical mold for centrifugally molding a cylindrical concrete product,
Particularly, the present invention relates to a mold release agent application device for a cylindrical mold that applies a mold release agent to the inside of the upper mold.

[0002]

2. Description of the Related Art Cylindrical concrete products such as concrete piles used as foundation piles are filled with ready-mixed concrete into cylindrical molds that can be divided into upper and lower parts, and the upper and lower molds are fitted together and joined together by a centrifugal molding machine. The cylindrical formwork is rotated at high speed to form a cylindrical concrete product. After centrifugal molding, the cylindrical concrete frame is divided into upper and lower parts, and the molded concrete product is separated from the frame to obtain a product.

At this time, a cylindrical mold is divided into upper and lower parts, and an oily mold releasing agent is applied by spraying or the like so that the concrete product molded on the inner surface of the cylindrical mold can be easily separated.

[0004]

However, when the cylindrical mold is divided into upper and lower parts, the lower mold part is divided with the inner surface thereof facing upward, so that the mold releasing agent can be easily applied. However, the inner surface of the upper mold is facing downward, and since it is necessary to apply the release agent from the lower part of the upper mold as it is, it is difficult to apply the mold release agent. It is necessary to carry out the work, and it takes a lot of time and labor and the burden on the operator is large.

In view of the above points, the present invention devises a mold release agent coating method so that the mold release agent can be applied as it is without reversing the upper mold form. An object is to provide an agent applying device.

[0006]

In order to achieve the above object, the present invention provides a plurality of form carrier conveyors for placing and carrying an upper form of a cylindrical form with the inside facing downward. Arranged in parallel, a traveling rail is arranged below the form conveying conveyor in parallel with the upper form frame to be conveyed, and a releasing agent is sprayed onto the inner surface of the upper form frame on the traveling rail. A predetermined length portion is located above the running rail of the mold carrier conveyor while the release agent spraying device, which is mounted with the nozzle facing upward and runs over the entire length of the upper mold, is movably arranged. Is configured to rotate about the end as a conveyor rotation unit, and the conveyor rotation unit is rotated downward so that the nozzle can pass when the nozzle traverses the formwork conveyor. It is configured to be temporarily saved.

Further, a cover body can be moved along the traveling rail above the vicinity of both ends of the traveling rail so as to close the opening portions on both ends of the upper frame mounted on the frame conveying conveyor. It is arranged in.

[0008]

According to the present invention, the upper formwork of the cylindrical formwork is placed on the formwork transfer conveyor with its inner surface facing downward, and this upper formwork moves on the formwork transfer conveyor. When it reaches directly above the traveling rail, the conveyor rotating part of the formwork conveying conveyor is rotated downward to form a space above the traveling rail of the formwork conveying conveyor to form a space. A nozzle for ejecting the mold agent is allowed to travel across a plurality of conveyors for conveying the molds. Then, while ejecting the release agent from the nozzle, the release agent ejecting device is caused to travel along the traveling rail over the entire length of the upper mold to apply the release agent to the inner surface of the upper mold. When the application of the release agent is completed and the nozzle stands by at a position away from the upper mold, the conveyor rotating unit is rotated upward to restore the original conveyor shape, and the upper mold is moved to the next step. Move it.

Further, when the mold release agent is applied, a cover body movably arranged above both ends of the traveling rail closes both end openings of the upper mold placed on the mold conveying conveyor. By doing so, the release agent jetted toward the inner surface of the upper mold is less likely to be scattered to the periphery from the openings at both ends of the upper mold.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

A reference numeral 1 designates a mold carrier for carrying an upper mold A of a cylindrical mold which can be divided into upper and lower parts, and a plurality of conveyors are provided in a direction orthogonal to the longitudinal direction of the upper mold A to be carried. Conveyors are arranged in parallel. In the illustrated example, each of the mold conveying conveyors 1 has a chain conveyor 2 at the front portion and a roller conveyor 3 at the rear portion.

In the front chain conveyor 2, a drive sprocket 4 is rotatably attached to the tip of a long frame by a drive shaft 5, and a subordinate sprocket 6 is attached to the tail side.
Are rotatably attached by a dependent shaft 7, and a chain 8 is wound around these sprockets to form a chain conveyor 2. And each chain conveyor 2 arranged in parallel
The driving sprockets 4 are connected to each other by a power transmission shaft 10 via a connecting member 9 and are rotated during rotation.
Are rotating at the same speed.

A drive motor 11 is attached to an end of the chain conveyor 2, and a sprocket 12 of the drive motor 11 and a power transmission sprocket 13 attached to a drive shaft 5 of the drive sprocket 4 are connected to a chain 14.
The chains 8 of the respective chain conveyors 2 are run by being driven by the drive motor 11.

At both ends of the dependent shaft 7 on the tail side of each chain conveyor 2, one end of a short roller conveyor is fixed to the dependent shaft 7 so that the chain is rotatable about the dependent shaft 7. It constitutes part 15. The conveyor rotating parts 15 are connected to each other by a rotating shaft 17 via a connecting tool 16, and each conveyor rotating part 15 is rotated by the rotation of the rotating shaft 17.

The dependent shaft 7 has an arm 18 for turning the dependent shaft.
And a toggle link 19 whose other end is rotatably attached to the frame of the chain conveyor 2 is attached to the arm 18, and the link connecting portion of the toggle link 19 is attached to the tip end portion of the piston rod 21 of the cylinder 20. Attached to
By extending the piston rod 21 of the cylinder 20, the conveyor rotating unit 15 is held in a horizontal state,
The conveyor rotation unit 15 is rotated downward by reducing the size.

The roller conveyor 3 at the rear of the formwork conveying conveyor 1 has a large number of conveying rollers 22 on a short frame.
Is rotatably arranged, and is arranged so that the upper mold A can be transferred to the chain conveyor 2 side.

A traveling rail 23, which is longer than the entire length of the upper formwork A to be conveyed, is arranged below the conveyor rotating unit 15 so as to be orthogonal to the chain conveyor 2 and the roller conveyor 3, and above the traveling rail 23. A mold release agent ejecting device 24 for applying a mold release agent to the mold A is movably arranged.

The release agent ejecting device 24 holds the traveling rail 23 between a main wheel 26 and an auxiliary wheel 27 arranged on the traveling carriage 25, and a traveling motor 28 mounted on the traveling carriage 25 holds the main wheel 26. Is driven to rotate and run. Further, a cylinder 29 is mounted on the traveling carriage 25, and a releasing agent ejecting nozzle 31 for ejecting a releasing agent is attached to a tip end portion of a piston rod 30 of the cylinder 29, and the nozzle 31 is raised by extending the piston rod 30. When this is done, the tip end of the upper mold frame A is made to approach the inner surface of the upper frame A to be coated.

Reference numeral 32 denotes a cover body for closing both ends of the upper mold A when applying the mold release agent to minimize scattering of the mold release agent. Wheels 34 are provided as appropriate, and the guide rails 36 supported by the pedestals 35 at the rear of the roller conveyor 3 are sandwiched by the wheels 34, and various upper molds are provided along the longitudinal direction of the upper mold form A by a drive motor (not shown). Only the distance corresponding to the length size of the frame A can be moved, and both ends of various upper molds A having different length sizes can be closed.

Therefore, when the mold release agent is applied to the inner surface of the upper mold A, the cover body 32 is first retracted to a position where the transfer of the upper mold A is not hindered, and the mold release agent ejecting device is also used. 24
The nozzle 31 is moved to the vicinity of the end of the upper mold form A where
To lower. Further, the piston rod 21 of the cylinder 20 is extended to rotate the conveyor rotating portion 15 to a horizontal position, so that the conveyed object can be transferred from the roller conveyor 3 to the chain conveyor 2.

Next, the upper mold form A with the inner surface facing downward
Is mounted by a crane or a transfer device so as to straddle between the roller conveyor 3 and the chain conveyor 2 of the form conveying conveyor 1 so that the upper form A is located above the conveyor rotating unit 15. If the upper frame A is transferred to the roller conveyor 3 due to the previous process, the upper frame A may be once placed on the roller conveyor 3 and then moved to the position.

Next, the cover bodies 32 on both sides are moved inward to bring the cover bodies 32 into contact with the opening portions at both ends of the upper mold form A to close the opening portions. Then, the piston rod 21 of the cylinder 20 is contracted to rotate the conveyor rotating portion 15 downward so as to form a space at the connecting portion between each chain conveyor 2 and the roller conveyor 3.

Next, the traveling motor 28 of the releasing agent ejecting device 24 is driven to position the releasing agent ejecting nozzle 31 at the end of the upper mold form A, and the piston rod 30 of the cylinder 29 is extended. The nozzle 31 is raised to face the inner surface of the upper mold form A, and the mold release agent is jetted from the nozzle 31 toward the inner surface of the upper mold form A. Then, while the release agent is ejected from the nozzle 31, the traveling carriage 25 is moved along the traveling rail 23 to apply the release agent over the entire inner surface of the upper mold form A.

When the application of the mold release agent is completed, the nozzle 31 is lowered to stand by at the original position near the end of the upper mold A, and the cover 32 is separated from both sides of the upper mold A. The conveyor rod 15 is rotated upward by the extension of the piston rod 21 of the cylinder 20 and returned to the original horizontal position to secure the transport path of the upper mold A, and the chain conveyor 2 and the roller conveyor 3 are secured. Drive the upper form A
Is transferred to the chain conveyor 2 side and carried out to the next process.

Although the formwork conveyor 1 is composed of the chain conveyor 2 and the roller conveyor 3, it is not limited to such a conveyor, and the conveyor rotating portion 15 is rotated downward to separate the conveyor. Although the nozzle 31 for ejecting the mold agent is passed through, the conveyor rotating unit 15 may be configured to be laterally slid so that the nozzle 31 can be passed through. Various modifications are possible within the scope of the present invention. Of course, changes can be made.

[0026]

INDUSTRIAL APPLICABILITY As described above, in the mold releasing agent coating device for a cylindrical mold according to the present invention, for transferring the upper mold A of the cylindrical mold whose inner surface is directed downward, A release agent spraying device in which a traveling rail 23 is arranged in parallel to the upper mold A to be conveyed below the conveyor 1 and a release agent spraying nozzle 31 is mounted on the traveling rail 23 so as to face upward. 24 is movably disposed, and when the release agent ejecting device 24 is traveling, the conveyor rotating unit 15 provided in the form carrier 1 is rotated downward to cause the release agent ejecting nozzle 31 to move to the mold. Since a space that can traverse the frame conveyer 1 is ensured, the mold release agent jet nozzle 31 runs over the entire length of the upper mold A with the inner surface of the upper mold A facing downward. The mold release agent can be applied by applying the mold release agent, and the mold release agent can be applied without inverting the upper frame A. It can be carried out easily.

Further, since the cover bodies 32 for closing the both end openings of the upper mold A are disposed above the both ends of the traveling rail 23, the both end openings of the upper mold A at the time of applying the mold release agent. The release agent can be blocked and the scattering of the release agent to the periphery can be minimized.

[Brief description of drawings]

FIG. 1 is a partially omitted front view of a release agent application device for a cylindrical mold according to the present invention.

FIG. 2 is a partially omitted plan view of the above.

FIG. 3 is a partially enlarged front view of the vicinity of the above end portion.

FIG. 4 is a partially enlarged plan view of the vicinity of the above end portion.

[Explanation of sign]

DESCRIPTION OF SYMBOLS 1 ... Conveyor for formwork 2 ... Chain conveyor 3 ... Roller conveyor 15 ... Conveyor rotating part 23 ... Running rail 24 ... Release agent ejection device 31 ... Release agent ejection nozzle 32 ... Cover body

Claims (2)

[Claims] 1. A plurality of formwork carrying conveyors for placing and carrying an upper formwork of a cylindrical formwork having an inner side facing downward are arranged in parallel, and a plurality of formwork carrying conveyors are arranged below the formwork carrying conveyor. A traveling rail is arranged in parallel with the upper formwork to be transported, and a nozzle for ejecting a release agent is mounted upward on the inner surface of the upper formwork to run over the entire length of the upper formwork. While the mold releasing agent ejecting device is movably disposed, a predetermined length portion located above the traveling rail of the mold conveying conveyor is used as a conveyor rotating portion so as to rotate about the end. A cylindrical mold characterized in that when the nozzle traverses a formwork conveying conveyor, the conveyor rotating part is rotated downward to temporarily retract so that the nozzle can pass through. Frame release agent application device. 2. A cover body, which closes both end openings of an upper mold mounted on the form carrier, can be moved along the travel rail above the both ends of the travel rail. The mold release agent applicator for a cylindrical mold according to claim 1, wherein