JP2599791Y2 - Top form reversing device for cylindrical form - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversing device for applying a release material to an inner surface of an upper mold of a cylindrical mold for molding a concrete product which can be divided into upper and lower parts.

[0002]

2. Description of the Related Art When a cylindrical concrete product is molded and manufactured using a cylindrical mold that is divided into upper and lower parts, first, a lower mold containing a reinforcing member serving as a core metal is filled with ready-mixed concrete, and then the upper concrete is filled. The mold is attached to the lower mold to form a cylinder, and the cylindrical mold is rotated by a centrifugal molding machine to mold a cylindrical concrete product. After the curing process is completed, the molded form is sent to a demolding step, in which the upper mold form and the lower mold form are separated to take out a concrete product.

The upper and lower molds are coated with a release material in advance so that the concrete product is easily detached from the mold during the demolding. Conventional methods for applying the release material include a crane and the like. In general, a mold release agent is applied by lifting the upper mold frame and inverting the mold so that the inner surface faces upward.

[0004]

[Problem to be Solved by the Invention] However, the work of reversing the upper formwork of the cylindrical formwork using a crane,
Since the formwork is heavy and long, careful attention must be paid to safety, the burden on the operator is large, and the automation of the line is hindered.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an upper mold reversing device for a cylindrical mold that can be safely and quickly performed by automating the reversing operation.

[0006]

According to the present invention, in order to achieve the above object, one end of a form support arm on which an upper form of a cylindrical form that can be divided into upper and lower parts is placed is rotatably mounted. Axed,
While providing the support arm rotating means for half turn formwork support arm about the shaft attachment portion to the mold frame supporting arm, the mold
Both the upper formwork placed on the form support arm on the form support arm
A pair of left and right holding bodies for holding the side portions is provided, and
From the vicinity of the center of the form support arm to the left and right
Screw each other on a threaded bar with reverse threads
The pair of left and right holding bodies are rotated by the rotation of the
To move toward and away from the center of the
It is a thing.

[0007]

According to the present invention, when the mold release agent is applied to the inner surface of the mold, first, the upper mold divided from the lower mold is supported by the upper mold reversing device with the inner surface facing downward. It is mounted on the arm by a crane or a transfer device. Next, the upper mold on the mold support arm is clamped and fixed by the mold clamping means provided on the mold support arm. Then, by driving the support arm rotating means, the mold support arm to which the upper mold is fixed is rotated by half around the shaft attachment portion on one end side of the mold support arm. In this way, the upper form of the cylindrical form is automatically and safely inverted.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show the structure of the upper mold reversing device of the present invention. A plurality of bearing mounts 1 for supporting the upper mold reversing device are provided on the floor surface at appropriate intervals. The bearings 2 are fixed on the bearing base 1, respectively, and one pivot shaft 3 is penetrated through the bearing 2 so as to be rotatably mounted on the bearing 2.

Reference numeral 4 denotes a geared motor for rotating the pivot shaft 3 forward and reverse, and a sprocket 5 fitted to the pivot shaft 3.
The chain 7 is wound around the sprocket 6 attached to the geared motor 4, and the geared motor 4 can rotate the pivot shaft 3 forward and backward by 180 degrees. A form support arm 8 having one end fixed thereto is attached to the pivot shaft 3 at appropriate intervals, and the other end of the form support arm 8 is engaged with a support column 9 erected on the floor. If it is kept almost horizontal.

The form support arm 8 is composed of a frame 10 formed in a substantially U-shape. Inside the frame 10, as shown in FIGS. A cylinder 1 comprising an elevating body 12 slidably held, and the elevating body 12 attached to a lower portion of a frame 10.
3 to ascend and descend.

As shown in FIG. 3, an upper mold A
Are provided with a pair of holding members 14 for holding the upper mold frame A by gripping the flange portions B provided on both sides of the holding member 14. This holding body 14
Is mounted on a guide rail 15 so as to be able to move laterally, and a screw rod 16 in which reverse screws are threaded to the left and right from near the center of the elevating body 12 is screwed to a pair of left and right holding bodies 14. And a sprocket 19 of a driving motor 18 attached to the elevating body 12 by means of a chain 20. The pair of right and left holding bodies 14 are moved toward and away from each other by forward and reverse rotation of the driving motor 18 to form an upper mold. A can be pinched and released.

Reference numeral 21 denotes a chain conveyor for conveying the inverted upper frame A, and as shown in FIG. 6, the upper frame A is inverted by rotating the frame supporting arm 8 holding the upper frame A. When the upper mold A is received, it is transferred to the next step.

When the upper mold A is turned upside down and the release agent is applied, first, the mold support arm 8 is rotated and positioned toward the support column 9 so that the upper mold A can be placed. Keep it. After the molding of the concrete product is completed, the removed upper mold frame A is suspended by a crane or the like and placed on the frame 10 with its inner surface facing downward. At this time, the pair of left and right holding bodies 14 are left and right opened. When the upper mold frame A is placed on the frame 10, the driving motor 18
Is rotated in the forward direction to rotate the screw rod 16, move the holding body 14 in a direction to approach each other, and hold the upper mold frame A on the frame 10 by clamping the flange portions B provided on both sides of the upper mold frame A. Fix it.

Next, by driving the geared motor 4 to rotate the pivot shaft 3, the form support arm 8 is rotated 180 degrees toward the chain conveyor 21 as shown in FIG.
Next, in order to lower the upper frame A, which is suspended above the chain conveyor 21, onto the chain conveyor 21, the piston rod of the cylinder 13 is extended and the lifting body 12 is slid as shown in FIG. The moving body 11 is slid down. When the upper mold frame A is placed on the chain conveyor 21, the driving motor 18 is driven in the reverse direction to rotate the screw rod 16 in the reverse direction, and the holding members 14 are moved away from each other to release the holding.

When the reversal of the upper mold A is completed in this way, the geared motor 4 is driven to rotate in the reverse direction, and the mold support arm 8 is driven.
Is rotated toward the support column 9 to return to the original horizontal position and wait. The mold release agent is applied to the inner surface of the upper mold frame A while the upper mold frame A on the chain conveyor 21 whose inversion is completed is transported with the inner surface facing upward.

[0017]

As described above, according to the present invention, the form supporting arm 8 having one end fixed to the long pivot shaft 3 rotatably mounted on the shaft is provided along the longitudinal direction of the pivot shaft 3. A holding body provided at appropriate intervals so that the pivot shaft 3 can be controlled to rotate forward and backward by 180 degrees by the geared motor 4, and holds the upper frame so that the upper frame does not drop when the frame supporting arm 8 is inverted. 14, the upper formwork on the form support arm 8 is inverted while being clamped by the holding body 14, so that the work of reversing the upper formwork is automated and safer than the conventional work of reversing with a crane or the like. The reversing operation can be performed quickly and quickly.

[0018]

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a partially cutaway enlarged cross-sectional view taken along a line CC in FIG. 1;

FIG. 4 is an enlarged plan view of a form support arm portion.

FIG. 5 is a view for explaining a state in which a form support arm is inverted.

FIG. 6 is a diagram illustrating a state in which the holding of the mold from the mold supporting arm is released.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Pivot shaft 2 ... Geared motor 8 ... Form support arm 10 ... Frame 12 ... Elevating body 13 ... Cylinder 14 ... Holding body 15 ... Guide rail 16 ... Screw rod 18 ... Drive motor

Claims (1)

(57) [Scope of request for utility model registration] An end of a form supporting arm on which an upper form of a cylindrical form which can be divided into upper and lower parts is mounted, and one end of the form supporting arm is rotatably mounted on the form supporting arm. while the formwork support arm provided support arm rotating means for half turn, the formwork
Both sides of the upper mold placed on the form support arm on the support arm
A pair of left and right holding bodies for holding the portion is disposed, and the pair of left and right
Hold the holding body to the left and right from near the center of the form support arm.
First, screw each reverse screw into a threaded screw bar.
The pair of left and right holding bodies are rotated by the
An upper mold reversing device for a cylindrical mold, wherein the upper mold reversing device is configured to approach and separate from the vicinity of the central portion of the cylindrical mold.