JPS5820765B2 - Concrete pipe manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing various types of concrete pipes, such as hume pipes and centrifugal roller compaction pipes. A plurality of tire parts installed around the outer periphery of the formwork are supported by forcibly driven receiving rollers of the manufacturing equipment, and the formwork is rotated in a horizontal state to centrifuge the concrete previously placed inside the formwork. It is shaped using force.

Since the manufacturing apparatus described above employs a structure in which the tire of the mold is supported by receiving rollers arranged on both sides, several problems arise that must be solved.

The first problem is the angle formed by the line connecting the centers of the support rollers on both sides of the supported formwork, in other words, the support interval of the support rollers on both sides with respect to the diameter of the formwork.

In other words, the interval between the supporting rollers on both sides is widened, and the internal angle of the line connecting the center of the formwork and the center of the supporting rollers on both sides is 115.
If the temperature exceeds °, the formwork will fall deeply between the receiving rollers on both sides, and the weight of the formwork will bite into the space between the rollers on both sides, causing an extremely large output to be required to drive the receiving rollers. However, there are problems in that the equipment becomes larger and the power consumption increases.

Furthermore, if the interval between the receiving rollers on both sides is narrowed so that the internal angle of the above-mentioned angle becomes 90° or less, sufficient contact pressure between the circumferential surface of the tire of the formwork and the circumferential surface of the receiving rollers on both sides cannot be obtained. There is a problem in that slipping occurs and it is not possible to rotate the formwork.

The second problem is that since there is a compaction roller that finishes the inner peripheral surface of the concrete pipe, even if the formwork has different diameters, the vertical center of the formwork must be kept constant and the relationship between the formwork and the compaction roller should be maintained. This is a point that should not be changed significantly.

The third problem is that the device cannot be used effectively unless it is possible to manufacture various hume tubes with different diameters.

This invention was made in order to solve all of the above-mentioned problems, and the first purpose is to freely (adjust) the arrangement interval of the receiving rollers on both sides that support the formwork, and to make it possible to adjust the diameter. It is an object of the present invention to provide a manufacturing device that can support molds of different sizes in an optimal state and can be used in a wide range of applications with a single device.

The second object of this invention is to maintain the internal angle of the line connecting the center of the formwork and the center of the support rollers on both sides within the range of 90° to 115° even if the formworks have different diameters. The purpose of the present invention is to provide a manufacturing device capable of applying the necessary rotation to a formwork using a small-sized drive machine.

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

The illustrated manufacturing device is an example of manufacturing a centrifugal roller rolling pipe A, but in the case of a hump tube manufacturing device,
The manufacturing equipment will be explained based on this manufacturing equipment, since they are almost the same except for the use of concrete with a relatively high moisture content, the rotational speed for generating centrifugal force, and the rolling pressure by the rolling pressure roller.

As shown in the figure, the formwork 1 used to form the centrifugal roller compaction pipe A has a two-sided structure with a large diameter part 2 forming a socket B on one end side, and the outer peripheral surface It is formed by attaching tires 3 to both ends and an annular casting 4 that forms the end surface of the pipe A to the end.

On the base 6 of the manufacturing device 5 that horizontally supports and rotates the formwork 1, two rotating shafts 7 are arranged horizontally and in parallel, and a pair of rotating shafts 7 are provided at each end of the rotating shafts 7 on both sides. Thus, the receiving roller 8 that supports the tire 3 is fixed.

As shown in FIG. 3, both ends of the rotating shafts 7 are supported so as to be rotatable by bearings 11 of a slider 10 that can move laterally along guides 9 provided at both ends of the base 6. The movers 10 are interlocked by a feed screw mechanism 12 so as to move toward and away from each other.

The screw shaft 13 of the feed screw mechanism 12 is as shown in FIG.
Male screws 14 are supported by bearings to be located at the upper part of both guides, and are equal and oppositely inclined at G2 pitch near the ends of both sides.
is formed, and each male thread 14 is screwed into a threaded hole provided in the slider 10 and passes through the slider 10.

The screw shaft 13 located on the left side of FIG. 1 is driven by a reversible motor 15 provided on the base 6, and the screw shafts 13 on both sides are connected to an endless chino 16 to a sprocket fixed to each. They are linked by a rack so that they rotate at the same speed.

Therefore, when the motor 15 is started, the pair of receiving rollers 8 move toward or away from each other while remaining in a parallel state, and the support interval of the formwork 1 changes.

One of the aforementioned rotating shafts 7 is driven in conjunction with a continuously variable speed motor 17 provided on the base 6, and by the rotation of a receiving roller 8 attached to this rotating shaft 7, both sides of the rotating shaft 7 are driven. The formwork 1 supported by the receiving rollers is rotated about its axis by friction between the tires 3 and the receiving rollers 8.

The continuously variable speed motor 17 is mounted on a base 6 as shown in FIG.
It is mounted on a movable table 19 which is movable along a guide 18 provided in the table, and its output shaft and shaft 7 are interlocked by using a chino and a sprocket.

The movable base 19 is movable in the same direction as the shaft 7, and the movable base 19 is also moved by a screw feed mechanism 20.

As shown in FIG. 3, the feeding mechanism 20 is formed by a screw shaft 22 having a male screw 21 passing through a screw hole in the movable table 19, and the screw shaft 22 is connected to the screw shaft 13 for the receiving roller 8.
It is linked so that it rotates at a constant speed using a chino and sprocket.

The male screws 14 and 21 of the screw shafts 13 and 22 are formed at equal pitches, so the receiving roller 8 and the motor 17 that drives it move together, changing the interval between the receiving rollers 8. It is designed so that it can always be driven.

The arrangement interval of the both-side support rollers 8 that are movable by the feed screw mechanism 12 is changed depending on the diameter of the formwork 1 to be supported.

That is, in the formwork 1, for example, one piece of pipe from a 400mmφ pipe is
Since several types are used, including those for forming pipes of 500iiφ, contradictory movements are given to both side receiving rollers 8,
These are set at optimal intervals according to the formwork 1.

The relationship between the spacing between the receiving rollers 8 on both sides and the formwork 1 is such that, as shown in FIG. is 1
The angle is determined to be in the range of 000 to 113 degrees.

By keeping the relationship between the receiving rollers 8 on both sides and the formwork 1 within the range described above, the formwork 1 will not bite into the space between the receiving rollers 8 on both sides, and a large load will not be applied to the motor 17. At the same time, the weight of the formwork 1 acts effectively on the receiving roller 8, and an effective frictional force between the tire 3 and the roller 8 is obtained, so there is no slippage and the formwork 1 can be rotated reliably.

Although the example in which the feed screw mechanism 12 uses a single screw shaft with reverse threads has been shown, separate screw shafts may be provided on both sides, and these may be formed in conjunction with each other as appropriate.

A rail 31 parallel to the axial direction of the formwork 1 is laid on the floor surface of the right end of the base 6 in FIG.
A cart 32 is arranged above so as to move toward and away from the base 6.

A long shaft-shaped rolling pressure roller 34 is rotatably attached to the upper part of the support frame 33 provided on the truck 32 so as to protrude toward the formwork 1 side supported by the receiving roller 8.

The compacting roller 34 is horizontally arranged with its end supported by a bearing, and when the cart 32 approaches the base 6 closest to the base 6 as shown in FIG. It has a protruding length.

The compaction roller 34 is driven by a motor 35 provided on the cart 32.
Accordingly, it is driven in the same direction as the formwork 1 so that the circumferential speed is higher than the inner circumferential speed of the pipe A formed in the formwork 1.

A support stand 36 is erected on the floor near the left end of the base 6 in FIG. It is provided.

A molding machine 37 for molding the inner periphery of the socket B is arranged on the floor on the same side as the support table 36.

On a fixed stand 38 erected on the floor of this molding machine 37.

Lifting platform 40 mounted to move up and down with cylinder 39
A movable base 42 is installed on the lifting base 40 so as to be moved forward and backward by a cylinder 41, and a shaft 43 parallel to the axis of the formwork 1 is rotatably supported by a bearing on the movable base 42. There is.

A socket B is attached to the tip of the shaft 43 that protrudes toward the formwork 1.
A large diameter portion 44 forming a stepped portion from the inner periphery of the large diameter portion 44 .

A rolling pressure roller 46 is provided with a small diameter portion 45 that protrudes from the large diameter portion 44 and forms the inner diameter of the pipe A.

The above-mentioned shaft 43 is a continuously variable speed motor 4 attached to a bearing.
7, the rolling pressure roller 46 is driven to rotate in the same direction as the formwork 1 and at a higher circumferential speed than the pipe A.

The compaction roller 46 is moved up and down and forward and backward by the expansion and contraction movements of the cylinders 39 and 41, allowing the casting 4 to escape and being moved into and out of the formwork 1 at a predetermined position.

A concrete supply mechanism 51 is provided on the floor near the right end of the base 6 in FIG. 1 for filling the formwork 1 supported by receiving rollers 8 with aligned concrete.

The supply mechanism 51 includes a cart 32 that moves on the rails 31.
A frame 52 is erected to form a hoof-like shape, a belt conveyor 53 is supported horizontally parallel to the axis of the formwork 1, and a hopper 54 is placed directly above the conveyor 53. It consists of a feeding mechanism 55 located between the hopper 54 and the conveyor 53, which evenly supplies the concrete in the hopper 54 onto the conveyor 53.

The belt conveyor 53 has a frame body supported by rollers 56 attached to the frame 52, and is movable in the longitudinal direction so as to be able to enter the upper part of the formwork 1. Progress is given based on the forward/reversal of the numbers.

The filling of concrete into the formwork 1 by the concrete supply mechanism 51 is automatically controlled in accordance with compaction by the compaction rollers 34, so that a pipe with uniform strength is formed over the entire length of the formwork 1. There is.

The supply mechanism 51 is controlled during concrete filling by electrically detecting the compaction state of the concrete filled position via the compaction roller 34, and operating the motor 57 in response to this compaction detection signal. The filling position of 53 is sequentially moved at regular intervals.

The manufacturing apparatus of the present invention has the above-mentioned configuration, and the manufacturing method will be explained next.

First, the arrangement interval of the both-side support rollers 8 is determined depending on the formwork to be used.

The interval between the receiving rollers 8 is determined by starting the motor 15 and starting the feed screw mechanism 1.
2 to approach or move away.

Next, the assembled formwork 1 incorporating the reinforcing bar cage is placed on the receiving roller 8, and the cart 32 is advanced toward the formwork 1, and the rolling roller 34 is inserted into the formwork, This roller 3
4 is supported by a bearing 37.

Further, the rolling pressure roller 46 for forming the socket is also mounted on the cylinder 39.
．． 41 to enter a predetermined position in the large diameter portion 2 within the formwork 1.

At the same time, the motor 57 of the supply mechanism 51 is started, the belt conveyor 53 is advanced to enter the formwork 1, and each motor 17, 35, 47 is started to rotate the formwork 1 and the rolling roller 34. let

A predetermined amount of hard-mixed concrete is placed in the hopper 54 in advance, and when the conveyor 53 is driven,
This concrete is filled into the rotating formwork 1, and when the conveyor 53 fills the specific position with concrete to a certain amount and the compaction in this area reaches a certain value,
The motor 57 is rotated at a constant rate, and the belt conveyor 53 is moved by one pitch to fill the next position.By repeating compaction and filling in sequence, a uniform compacted state is achieved over the entire internal length of the formwork 1. Pipe A is formed.

As described above, according to the present invention, the receiving rollers on both sides supporting the formwork are arranged so that they can approach and separate from each other,
Since the spacing between the supporting rollers on both sides is adjusted using the feed screw mechanism, the internal angle of the line connecting the center of the formwork and the center of the supporting rollers on both sides can be adjusted from 90° to 11° even if the diameter of the formwork changes.
It can be maintained within a range of 5°C, and therefore, when the formwork is supported, the formwork does not bite into the space between the receiving rollers, and there is no large resistance to the rotation of the formwork. The rotary drive machine can be downsized and power consumption is reduced, making it economical.

In addition, sufficient contact between the formwork tires and the receiving rollers is obtained, so there is no slippage in rotation transmission.
The formwork can be rotated reliably.

In addition, by changing the support interval according to the formwork, it is possible to support the formwork without changing its vertical axis, and the relationship between the formwork and rolling rollers does not change significantly, so it can be used not only for fume pipes but also for
It is now possible to manufacture centrifugal roller compaction pipes, and even if the diameter of the mold changes, molding can always be done in the same state.
This can have the effect of greatly expanding the range of uses.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a partially cutaway front view of the manufacturing apparatus according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view showing the main parts of the same, and Fig. 4 is an explanatory diagram showing the relationship between the formwork and the receiving roller. 1...Formwork, 5...Manufacturing equipment, 6...
...Base, 7...Rotation axis, 8...
Reception roller, 9... Guide, 10... Mover, 11... Bearing, 12, 20...
Feed screw mechanism, 13, 22...screw shaft, 14,
21... Male screw, 15, 17... Motor, 18... Guide, 19... Movable base.

Claims (1)

[Claims] 1. The receiving rollers on both sides that support the formwork for forming a concrete pipe are arranged so that they can approach and separate from each other, and the spacing between the receiving rollers on both sides can be freely adjusted using a feed screw mechanism, and the receiving rollers on both sides A driving machine that provides rotation is arranged so as to be movable in the same direction as the receiving roller, and a feed screw mechanism of the driving machine and a feeding screw mechanism of the receiving roller are interlocked so that the receiving roller and the driving machine move together. A concrete pipe manufacturing apparatus characterized in that the internal angle formed by the line connecting the center of the formwork and the center of the support rollers on both sides can be maintained within the range of 90° to 115°C.