JPS5938087B2 - Formwork reversing machine for concrete pipe forming - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reversing machine for forming forms for concrete pipes and the like.

Formwork for forming concrete pipes, etc. is made by combining a pair of formworks with semicircular cross sections to form a cylindrical shape.The formwork is rotated and concrete is poured inside, forming a concrete pipe by centrifugal force. The frame is disassembled and products such as concrete pipes are taken out.

The mold from which the product has been removed must be turned over and the inner surface cleaned.

Conventionally, as a reversing machine for such a semicircular formwork, a rotatable arm whose lower part is pivotally connected to a shaft is provided, and a part of the formwork that has been transported by an appropriate conveyance machine is transferred to the arm. Grasp it by the tip,
There is one that rotates the formwork together with the arm and flips it around.

However, such a known reversing machine has a large arm that grasps the formwork and rotates it approximately 180 degrees, so it requires a large space for reversing the formwork, and it also lifts the heavy formwork and rotates it in a semicircular trajectory. There are problems such as a considerable amount of power is required since the device must be moved by drawing the image.

This invention differs from the conventional reversing machines as described above, in that it is an object of the present invention to enable the formwork to be reversed on the spot by simply lifting it slightly from the top of the conveyor.

The reversing machine of the present invention is circular and has an opening for entering and exiting the formwork in a part thereof, and is arranged to move up and down and rotate outside the formwork that is sent into a fixed position in the formwork conveyance path. It is characterized in that a pair of left and right gripping arms are provided inside the C-shaped rotating frame to grip the formwork that has entered the rotating frame.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 and 2, the disassembled formwork 1 having a semicircular cross section is moving on a pedestal 3 of a chain conveyor 2 running in the direction of the arrow in FIG.

Although only one conveyor 2 is shown in Fig. 2 that supports near the left end of the formwork 1, a similar chain conveyor is provided in parallel on the right side of Fig. 2 to at least support the formwork 1. 1
The center and both ends of the container are supported and transported.

A lifting platform 4 is provided adjacent to each of the chain conveyors 2 and at a position lower than the conveyor 2.

Guide columns 5 are fixed to the four corners of the lower part of the lifting table 4, and the guide columns 5 are movable up and down along the guide cylinder 6.

Further, the lifting table 4 is provided with two threaded rods 7, which are attached to the machine box 8, and the lifting table 4 is raised and lowered by a screw jack mechanism provided in the machine box 8.

This screw jack mechanism is linked to the drive shaft 9 by a 4-len interlocking mechanism, so that the elevators belonging to each conveyor on the right side of FIG. 2 are also raised and lowered in synchronization.

A pair of receiving rollers 11 for receiving the rotating frame 10 are provided on the lifting platform 4.
The driving sprocket 12 of the rotating frame 10 is rotatably attached.

The shaft 13 of the sprocket 12 extends to the right as shown in FIG. 2, and is adapted to also rotate the sprocket of the adjacent lifting platform.

Although the rotating frame 10 is circular, it has a C-shape because a part thereof has an opening 20 for entering and exiting the formwork 1.

Further, a pair of flanged rollers 14 for receiving both sides of the inner circumference of the rotating frame 10 are provided on the table 4.

A roller chain 15 is fixed over the entire length of the rotating frame 10, and the sprocket 12 is meshed with the chain 15.

However, instead of the chain 15, pins that mesh with the sprocket 12 may be provided at a constant pitch, or teeth that mesh with the sprocket 12 may be provided in the shape of a gear. Any mechanism that can be rotated without any movement is sufficient.

A support frame 16 is provided on one side of the opening 20 of the rotating frame 10,
A pair of shafts 17 are rotatably attached to this support frame 16,
Gears 18 fixed to each shaft 17 are meshed with each other, and the rear portions of gripping arms 19 are fixed to each shaft 17, respectively.

One of the shafts 17 is extended to the right as shown in FIG. 2 and connected to a rotating frame on an adjacent lifting platform.

Although not shown, the shaft 17 is rotated forward and backward by a suitable motor provided on the rotation frame 10 to open and close the grip frame 19.

The present invention has the above-mentioned configuration, and its operation will be explained below.

First, in a state where the opening 20 is facing right and stopped as shown in Fig. 1, the mold 1 that has been moved on the pedestal 3 of the chino conveyor 2 enters the rotating frame 10 from the opening 20 and the mold is removed. When an appropriate detector detects that the center of the frame 7 is over the center of the rotating frame 10, the conveyor 2 stops, and at the same time the shaft 17 rotates and the gripping arm 19 rotates as shown by the chain line in FIG. move and grab formwork 1.

Next, the drive shaft 9 begins to rotate, and each threaded rod 7 rises to raise the elevator platform 4.

- When the detector detects that the rotating frame 10 that grips the formwork 1 has risen to a predetermined height as described above, the shaft 13 starts rotating, and the rotating frame 10 moves through the sprocket 12 and the chino 15. 18 (f') is rotatable, and when the opening 20 faces to the left in FIG.
is reversed, the lifting platform 4 is lowered, and the formwork 1 is reversed by 180°.
When the detector detects that the metal has been placed on the conveyor 2, the shaft 17 is reversed and each gripping arm 19 is opened.In this way, with each gripping arm 19 fully opened, the chain conveyor 2 is again moved to the position shown in FIG. It begins to move in the direction of the arrow, and the formwork 1, which is inverted and placed on the conveyor 2, comes out from the opening 20 facing left.

As described above, when the formwork 1 has come out of the rotating frame 10, the shaft 13 is reversed to return the rotating frame 10 to the state shown in FIG. 1, and is ready to receive the next formwork.

The present invention has the following effects due to the structure and operation described above.

(1) The formwork inside the C-shaped rotating frame is gripped by a pair of grip frames and rotated to flip the formwork on the spot, and the rotating frame rises slightly along with the lifting platform. Since the space required to invert the formwork is extremely small, it can be installed in a narrow space.

(2) Since the formwork is supported inside the rotating frame and rotates on the spot, less power is required to rotate the rotating frame.

Therefore, it leads to energy saving. (3) In the example, the case was explained in which the formwork that came in with the concave side facing up was reversed, but the same inverting machine could also be used to reverse the formwork that came in with the concave side facing down. Since the formwork can be reversed using the mold, it has the effect of easily reversing the formwork in any direction.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the reversing machine of the present invention, and FIG. 2 is a longitudinal sectional side view of the same. 1... Formwork, 2... Cheno conveyor,
4... Lifting platform, 10... Rotating frame, 19
...grabbing arm.

Claims (1)

[Claims] 1 In the transport path of the disassembled formwork, it is a circular shape that is arranged so as to move up and down and rotate outside the formwork that has been transported to a fixed position and stopped, and has an opening for entering and exiting the formwork in part. C
A frame reversing machine for concrete pipe forming, characterized in that a pair of left and right gripping arms are provided inside the letter-shaped rotating frame to grasp the formwork that has entered the rotating frame.