JPS60260305A - Manufacture of concrete pipe - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a pipe-making cylinder (industrial field) in which ready-mixed concrete is poured.
This invention relates to a method for constructing a concrete pipe in which the concrete pipe is formed by rotating a formwork and utilizing centrifugal force.

(Prior art) This type of concrete pipe manufacturing method using centrifugal force is
Ready-mixed concrete with appropriate fluidity, which is made by adding balance and crushing to cement and kneading it with water, is poured into fallopian tube #WPJ, which is a formwork for forming concrete pipes, and then the concrete is poured into the formwork for forming a concrete pipe, and the concrete is crushed by a far I-reca that acts on the ready-mixed concrete. A concrete pipe with a uniform wall thickness is formed inside the pipe-making cylinder by flowing fresh concrete so that it closely adheres to the inner peripheral surface of the pipe-making cylinder.
In this case, in the conventional general concrete pipe manufacturing method, the pipe cylinder was simply rotated to apply centrifugal force to the fresh concrete inside the pipe cylinder. The ballast is on the inner circumferential surface of the pipe tube (
In other words, it is concentrated in the outer periphery of the manufactured concrete pipe, and the bonding force between the ballasts due to the mixture of cement and sand, that is, mortar, is weak, and the ballasts have a relatively large diameter. There was a problem in that the ballasts concentrated near the inner peripheral surface of the pipe-making cylinder inhibited the fluidity of the fresh concrete, making it easy for the concrete filling density to decrease, resulting in a decrease in the strength of the concrete pipe. .

One way to solve this problem is to apply a moderate amount of vibration to the shell tube when pouring fresh concrete into the pipe tube and centrifugally forming the concrete pipe. Technology has already been developed to improve the bonding force between the ballasts by appropriately penetrating mortar into the gaps between the ballasts, which are concentrated on the inner peripheral surface, and to increase the fluidity of fresh concrete to increase the packing density of Funkrete. Are known. An example of a publicly known technology based on such a technical idea is Tokkosho! ;1r-11937/, but this known method uses an impact generating mechanism (11r1 vibration device) equipped with a cam mechanism,
The entire rotating wheel device, which is formed by integrating a rotating ring for supporting the tubular tube and a rotating shaft that pivotally supports the rotating wheel, is moved up and down to rotate the tubular tube. It is configured to give the vibration of However, in this known concrete pipe manufacturing equipment, the vibration plane II (up-up action) transmitted to the rotational measurement by the cam-type shock generating mechanism is intermittent and abrupt as shown by the point IW with the symbol (B) in Fig. 5. Occurs when the cam is pressed (when pressed by the peak of the cam) 8□
Yo) f6. 1.31.1, O, Yu, Ka, 1° mechanism) had a problem of increased wear and tear and increased vibration and noise during operation.

(VR problem to be solved by the invention) The present invention was made to solve or improve the problem pointed out in the above-mentioned section of the prior art. The object of the present invention is to provide a method for manufacturing a concrete pipe in which the filling density of concrete is increased, in which the wear and tear of the impact generating mechanism is reduced, and vibration and noise during operation can be reduced.

(Means for solving the MI problem) As a means for achieving the above object, the method for producing a concrete pipe of the present invention provides a method for producing a pipe containing ready-mixed concrete with a continuous and smooth vibration curve. The concrete pipe forming work is carried out by rotating the tube making tube while vibrating it along the .

(Example) Hereinafter, a concrete pipe manufacturing method according to one hundred examples of the present invention will be described with reference to FIGS. 1 to 3. 17 to 1I show a concrete pipe manufacturing apparatus suitable for carrying out the concrete g manufacturing method according to the embodiment of the present invention. First, the configuration of this concrete pipe manufacturing apparatus will be explained. This concrete! The manufacturing equipment 2 is a 2-unit system that can simultaneously manufacture concrete pipes using Goo's pipe-making equipment O9, Hiroo, etc., and has a base L.
Five sets of rotating wheel devices (described in detail later) are installed at appropriate intervals on the top.//
, 12. /3. /4! , /3 are arranged in parallel, and the pipe-making mao is supported between each adjacent rotary wheel device.

Each rotating wheel device //, /, 2. /3. /II, Is, the first rotating wheel device closest to the motor 2 serving as the drive device/
The N3 rotary wheel assembly M13 located at the third position and the fifth rotary wheel assembly Is located at the fifth position operate the driving side rotary wheel group IOA which is continuously driven by a motor during pipe making work as described later. They each have the same configuration as will be described in detail later. On the other hand, the second rotating wheel device /2 located at the second position and the first @ rotating wheel device ll located at the first position Each rotating a device of group IOA ii, i3.
/s driven rotation wheel group 10
R, and each rotary wheel device //, /3. /
It has a different configuration from 3.

Each rotating shaft N1/, /3, /j of the drive side rotating wheel group IOA
As shown in Figures 2 and 3 of the Imperial Decree, both ends 2/6.216 of the vertical rotating shaft 2/ are rotatably supported by a pair of plummer blocks S, and
It is constructed by coaxially fixing disc-shaped rotating wheels 3/, 3/ to both ends 27a, 21a of the rotating shaft 2/. still,
The rotary wheel 3/ is formed by inserting a cone key t2 with force between the tapered boss hole 70 of the rotary shaft 3/ and the end 2/6 of the rotary shaft 21 using a cone key holder 61. is fixed to the end portion 2/e of the rotating shaft 21.
It is rotated integrally with the Further, in FIG. 3, the reference numeral 60 is a cover, and the reference numeral 3 is a holding bolt.

This driving side rotating wheel group/□A each rotating wheel device//.

/3. /! ; is a first belt 113A stretched between the motor 2 and the rotating shaft of the first @ wheel device //, and 15;
The rotating shaft 21 of the first rotating wheel fitting// and the third rotating wheel fitting f
A second belt 1f (jB and a third belt qs
c, the rotation shaft 2/ of the third rotation wheel assembly M13, and the fifth rotation 11
1iiifl! 15 rotating shafts 21 between which the second relay mount m
They are interconnected by a first belt 1I5D and a fifth belt l1jH stretched across belts s and 2, and are synchronously rotated in the same direction by the rotational force of the motor 2.

On the other hand, the second rotating wheel device/2 and the ≠ rotating wheel device/≠ of the driven side rotating wheel group 10H are also at both ends 2.26.22 of the rotating shaft no.
It is constructed by attaching donut-shaped rotary shafts ll32 and 32 to each of the second and second rotary shafts m.
/2. /lI is a pipe making m1Io which is installed on the upper part of the rotating wheels 3.2.32 which are eccentrically rotated (non-circular rotation) with respect to the rotating shaft 22.

It is equipped with a vibration device 9 for vertically vibrating. That is, this vibrating device D decenters the axis J6 of the end portions 22a, 22α by an appropriate dimension S1 with respect to the fine center Ll of the intermediate portion 2.2b, as shown in FIGS. 2 and 11. A pair of plummer blocks! , 3 rotatably supported (
B, the center of rotation of the rotating shaft 2.2 is the axis L1 of the intermediate portion 22b.
), and the WI end 2 cores eccentrically relative to the center of rotation L1 of the rotation @2.2, the boss part is connected to the rotary shaft end 226 via a bearing Otsuwa to the The boss member 6I1. A donut-shaped rotating ring 32 is attached to the outer periphery of the rotating shaft coaxially with the rotating shaft end λ2C (therefore, the rotation center of rotation @32 is
(The length of both ends of the rotating shaft 22φ is set to L2.) Furthermore, the 11th
．． In the figure, the symbol zS is an end plate, and the symbol 6 is a bearing holder.

Further, the second rotating wheel device 12 and the first rotating wheel device /l of the driven side rotating wheel group 10H are stretched between the rotating shaft 2/ of the seventh rotating wheel device /l and the clutch 3. 6th belt game 5F
And the clutch 3 and the whistle! Rotating shaft of rotating wheel device/2, 22
The 7th belt 1Itc stretched between the 7th belt 1Itc and the 2nd belt 1Itc
Rotating shaft 2 of device/2 and rotating shaft 2 of first rotating wheel device/≠
2 are connected to each other via the third belt t5H and the ninth belt t13, which are stretched through the third relay device j3, and when the clutch 3 is in the connected state (ON state), are caused to rotate synchronously in the same direction by the motor 2, whereas the clutch 3 is rotated synchronously in the same direction. 1!7 When it is in the ajopp position a), it is not rotated and is held at the stop position by the brake≠.

In the second rotary wheel device 12 and the first rotary wheel device /l configured in this way, the rotary wheel 32 and the rotary shaft 2.2 are relatively rotatable. As will be described later, each rotating wheel device of the drive side rotating wheel group IOA is connected to each rotating wheel device of the drive side rotating wheel group IOA via the HIM cylinder IIO that rolls on the @ rotating wheel 32.
/3. ．． When the clutch 3 is turned on and the rotating shaft 2 is rotated while being rotated by the rotational force of the rotating wheel 3
2 rotates on its axis with a rotation radius of dimension S1 @2
A non-perfect circular rotation (cylindrical, b rotation) that revolves around the rotation center L1 of 2 is performed. On the other hand, when the clutch 3 is turned off to stop the rotation of the rotary shaft 22, the rotary wheel 32 performs concentric rotational motion about its rotation centers 1 and 2 at a predetermined position without revolutionizing. That is, in the former case, the pipe mao disposed on the rotary wheel 32 (described later) is vibrated in the vertical direction due to the eccentric rotational movement of the rotary shaft 3.2 (during vibration excitation), In the latter case, pipe making WJ
tto is rotated concentrically at a predetermined position without vibration (during non-vibration operation). In the former case (1&-32 makes an eccentric rotational movement at one time), the contact surface between the rotating shaft 32 on the rotary wheel device/2 side and the rotation @'7/ of the tube-making cylinder 110 is as shown in Fig. S. As shown by the solid line (A), it moves up and down along a continuous and smooth vibration curve.

In addition, the pipe manufacturing Wltto has disc-shaped rotating wheels≠7 at both ends of the cylindrical portion t2. The rotary wheel device of the driving side rotary wheel group 10^, which is configured by integrally attaching the rotary wheel, and is arranged parallel to every other wheel at a predetermined interval as described above, for example, the first rotary wheel device/
The rotating shafts 3/, 3/ of the driven side rotating shaft group 10B, for example, the rotating shafts 32.3 of a 182 rotating wheel set m/2.
2 and the respective rotating wheels 3/, j/ within a substantially V-shaped space lIt formed by the rotating wheels 3/, j/.

The rotation 84 (/, lA/) is rotatably supported by 32.
/ Rotating A-equipment! It is rotationally driven by the frictional force acting between the rotating wheels 3/ and 3/.

Next, to explain the concrete pipe manufacturing method according to the present invention, which is carried out using the concrete pipe manufacturing apparatus having the above configuration, firstly, when manufacturing a concrete pipe, reinforcing bars formed in a cage shape are formed inside the concrete pipe. Hiromoto's tube manufacturing tube tio with a body (not shown) attached.

1O... from each rotating wheel device //, /2. /3. /11,
/3 Placed at a predetermined position within the approximately V-shaped spaces l, get,... formed between each other, and then placed at a predetermined position in each pipe WψO1≠O... with appropriate fluidity. Pour a predetermined amount of fresh concrete having a Then, with the clutch 3 turned ON, the motor taco is started, and each rotating wheel assembly fll//, /- of the drive side rotating wheel group IOA is turned on.
3, /3 by rotating the rotating shafts 31, 31, . . . to produce each pipe.

At the same time as rotating lO..., driven side rotation 9 groups 10T
3 each rotating wheel device 12. /II each rotation axis 22°2.2
(the vibrating device wa is activated) and the non-circular rotation (eccentric rotation) movement of the rotating wheels 32, 32... each tube-making tube! l0911. Vibrate O... in the vertical direction. Therefore, the fresh concrete poured into the tube-making tube 11.0 is made to flow along the inner peripheral surface of the tube-making tube lO by centrifugal force, and a cylindrical fresh concrete fluid is formed in the tube-making section≠0. At the same time, mortar is moderately infiltrated into the gap between the ballasts in the ready-mixed concrete, which is concentrated on the inner circumference side of the pipe WI≠O by centrifugal force, due to the impact during vibration, and the mortar is The uniformity of the component distribution is promoted. Therefore, when the fresh concrete fluid hardens and becomes a concrete pipe (FA product), the strength of the concrete pipe is increased by an improvement in the bonding force of the mortar between the ballasts. In addition, the vibrating device vibrates the pipe g≠O by making a rotation N32.32 eccentrically rotated with respect to the rotation axis 2λ, so as to create a continuous and smooth shaking proboscis. Therefore, the vibration excitation device wa can operate smoothly, the degree of wear and tear on the vibration device wa can be reduced, and the vibration noise when the vibration device wa is in operation can be reduced.

Turn on the clutch 3 after a predetermined time has passed after starting the control operation.
Switch from position to OFF position and drive side rotating shaft group! On each rotating wheel device/2. The excitation action of the tube-making cylinder tO by /g is stopped. In this state, the operation of the vibration device 9 is stopped (that is, the rotation of the rotating shaft 22 is stopped and the rotation F41 is stopped).
32.3.2 is rotated at the same time as the center of rotation L2 (rotation in a perfect circle), and each pipe manufacturing section φo, po, etc. is held almost horizontally in a non-excited state and continuously rotates. It is rotated in Shimabara. In this state, a finishing rod (not shown) is inserted into the pipe making cylinder O, and the finishing rod is used to finish the inner surface of the fresh concrete fluid to make the circular surface as smooth as possible.

After finishing the inner surface of the fresh concrete fluid, the hardened state of the concrete is such that the shape of the concrete fluid formed in the pipe fNtto is maintained as it is even when the rotation of the pipe talIo is stopped. The rotational operation of the tube-making cylinder 110 is continued in the non-vibrated state until it becomes .

When the hardening of the concrete progresses to the level of stagnation, the rotation of the tube making tube 0 is stopped, and the tube making tube 0 is removed from the concrete tube Sta equipment @ 2 and left standing at a predetermined position, and the concrete is further cured. After steam curing until it is sufficiently hardened, the hardened concrete pipe is molded from Tube Seizuhiro 0.
W and make a product.

That's it for a series of concrete pipes! ll construction work furnace work.

In addition, in the concrete pipe manufacturing apparatus of this example,
The second and second rotary shafts of the driven side rotary wheel group lOB*/2.1
The rotating shaft 22, 22 of ≠ is connected to the drive device 2 via the clutch 3.
Therefore, in the concrete pipe manufacturing apparatus used in another embodiment of the present invention, each of the rotating shafts 2 and 22 is rotated by the drive device. Of course, the rotation may be performed by a dedicated drive device installed separately from 1!12.

Also, the concrete pipe aDa shown in Figures 1 to ψ!
The tHtl is only one example of a device for carrying out the method of the present invention, and it is of course possible to use devices having other structures in carrying out the present invention.

C) Effect of the invention) As is already clear from the above description, the method for producing a concrete pipe of the present invention is capable of producing a continuous and smooth vibration curve (A) while rotating a cylindrical pipe≠O containing fresh concrete. Since the concrete pipe forming work is performed within the range of rtra≠θ while vibrating along the same direction, it is possible to reduce wear and tear on the vibration device and reduce vibration noise during operation. .

[Brief explanation of the drawing]

Figure N1 is a concrete pipe f according to an embodiment of the present invention.
An overall side view of the concrete pipe manufacturing equipment used in the II construction method. Figure 1 is a view taken from the I-1 arrow in Figure 1, Figure 3 and Figure ≠ are a side view of the I-1 arrow in Figure 2, respectively. IV longitudinal section,
FIG. S is a comparison diagram of the vibration curve of the concrete pipe manufacturing apparatus of FIG. 1 and the vibration curve of the conventional concrete pipe manufacturing apparatus. 2...Ill! Vibration device 9... Vibration device 110... Pipe making tube 2... Concrete pipe manufacturing equipment Applicant: Koto Kogyo Co., Ltd. Industrial agent: Hiroshi Ohama, patent attorney

Claims (1)

[Scope of Claims] l. Rotatably supported and appropriate driving wj device (2)
At least one pair of rotation @(3/, 3/) is placed at an appropriate position on the rotating shaft (,2/, 22) rotated by the rotating shaft <2/', 22> and appropriately spaced apart in the axial direction of the rotating shaft <2/', 22>. 3.2 , J, 2) is rotated to apply centrifugal force to the ready-mixed concrete poured into it, forming a concrete pipe. The tube-making cylinder (lO
), and the pair of rotating wheel devices</
/, /2> at least one rotating wheel device (12
) A pipe manufacturing device in which ready-mixed concrete is poured into the inside using a concrete pipe manufacturing device <2> equipped with an excitation device (9) configured so that the rotating wheel <32.32> in ) performs a non-circular motion Tube <4! O) to the pair of rotating wheel devices (/ /
, /2> and further the pair of rotating wheel devices (/2>
/, /, 2) while rotating the vibration device (
9) to perform concrete pipe forming work inside the pipe making cylinder <aO> while rotating the pipe making cylinder (lIO) and vibrating it continuously and along the smooth vibration curve (A). This is a method of using concrete pipes, which is characterized by the following: