JPS597006A - Finishing machine for inner surface of concrete pipe - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for making concrete pipes by rotating the formwork, pouring concrete into the formwork, and forming concrete 11 within the formwork by centrifugal force. This invention relates to an internal finishing machine for concrete pipes formed on the internal surface.

When manufacturing concrete pipes by centrifugal forming, there is a known method in which hardened concrete is poured into a formwork and the inside of the concrete layer formed inward of the formwork is pressurized with compaction rollers. .

This invention differs from the conventional manufacturing method of concrete pipes using compaction rollers as described above, in which a paste-like concrete layer is poured into a rotating formwork and stretched (J) within the formwork by centrifugal force. The purpose is to remove moisture and dirt that has sprung up on the inner surface of the concrete layer by making slight contact with the finishing roller facing inward.

The inner surface finishing machine of the present invention has a pair of front and lower movable inner surface finishing rollers that removably and rotatably support inner surface finishing rollers that can be inserted into and pulled out of the formwork before and after a formwork support mechanism that supports and rotates the formwork. A bearing is provided, and at the rear of the formwork support mechanism there is provided an advancing/retracting member that can freely move toward and away from the formwork, and this advancing/retracting member is provided with a chuck that can be opened and closed to grasp the rear part of the inner surface finishing roller. This is a characteristic feature.

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

Formwork support mechanism 2 installed on the floor l as shown in Figures 1 and 2
A cylindrical formwork 4 is placed on support rollers 3 on the left and right front and back, and concrete is poured into the formwork 4 by driving the rollers 3, and a concrete pipe is formed by centrifugal force, which is the same as the known method. It is.

Reference numeral 5 denotes a base fixed on the floor l, with support stands 6 and 7 in front and behind it.
will be established. At the top of the front and rear support stands 6.7, there are support frames 8 and 9 with open front and rear sides, respectively, as shown in FIG. Bearing frames 12 and 13 are provided which vertically move up and down. A spherical concave opening is provided inside the bearing frame 12 as shown in FIG.
4 is mounted so as to be tiltable, and the inner surface of its inner ring 15 is formed with a tapered surface that fits the tapered shaft 17 at the tip of the inward finishing roller 16.

An inner ring of a rear bearing 18 made of a ball bearing is fixed to a part of the rear shaft of the roller 16, and a bearing outer ring 19 is attached to the outside of the bearing 18.
move forward and backward together with the rollers 16, and the bearing frame 13
An opening 20 into which the outer tube 19 is removably fitted is provided inside the opening 20, and this opening 20 is large enough to allow the finishing roller 16 to freely pass through.

The outer tubes 23 and 24 of the control wires 21 and 22 are fixed to each of the support stands 6 and 7, and the upper ends of these wires 21 and 22 are fixed to each of the bearing frames 12 and 13.

The outer tube 23, 24 and the control wire 21゜22
As shown in FIGS. 1 and 2, the control wires 21 and 22 are pulled out from the bottom of the support stands 8 and 9 and guided to the side of the base 5, and both control wires 21 and 22 are moved forward and backward using a control lever (not shown). Each of the bearing frames 12 and 13 is raised and lowered, and both bearing frames 12 and 13 are provided with stoppers at appropriate positions to keep them in a fixed position when raised. Furthermore, a plurality of spiral protrusions 25 are provided on the outer periphery of the finishing roller 16.

A pair of left and right base frames 26 are provided on the floor l behind the base 5, as shown in FIGS. Horizontal frame 2 on frame 9
A pair of left and right guide frames 30 are provided in parallel between 9. An advancing/retracting frame 31 is attached to both guide frames 3o. Guide frame 30
A guide rail 34 is fixed at the top and bottom of the frame 31, and as shown in FIG.
and wheels 33 that rotate around a vertical axis engage with each other to move the advance/retreat frame 3.
1 to accurately guide it back and forth, and one side of the upper guide rail 34 is shown in FIG.

As shown in FIG. 4, a rack gear 35 is fixed, and a pinion gear 37, which is rotated forward and backward by a travel drive motor 36 provided on the forward/backward frame 31, is meshed with the rack gear 35.
Drive 1.

Chucks 38 are provided at the front and rear of the lower part of the advancing/retracting frame 31, respectively. This chuck 38 has a pair of left and right shafts 3 as shown in FIG.
9, a pair of left and right pawls 41 are pivotally connected to the front and rear support plates 40 of the advancing/retracting frame 31, and a hydraulic, air, or electric power cylinder 42 for opening and closing the pawls 41. A shaft 43 provided at the lower end of the lifting rod 44 of the cylinder 42 is loosely fitted into a long hole in the second part of the winter melon 41.
Both ends of the support plate 40 are loosely fitted into vertical holes 45 provided in the support plate 40, so that the claws 41 can be opened and closed as the elevating rod 44 is moved up and down.

A rear shaft 46 integrally provided at the rear end of the finishing roller 16
is rotatably mounted on the top of the machine frame 47 as shown in Figure 1,
A motor 48 provided on the machine frame 47 rotates the finishing roller 16 together with the rear shaft 46 via a transmission belt and a pulley.

Further, a pair of left and right stoppers 49 are provided at the front of the machine frame 47 to hold both sides of the support frame 9 when the machine frame 47 moves forward and prevent the machine frame 47 from being rotated by the pressure when the rollers 16 are driven.

The structure of this invention is the above structure, and its operation will be explained below.

Initially, the advance/retreat frame 31 and the aircraft frame 47 were installed as shown by the chain lines in Figure 1.
is moved backward, and the finishing roller 16 is also lowered to the rear of the support stand 7. In this state, roller 3. A formwork is placed on J:, concrete is poured in, and the formwork 4 is rotated to form an inward concrete layer 50 of the formwork 4 as shown in FIG.

Next, under the condition that each bearing frame 12, 13 is in the -F raised position and its inner ring 15 is open [120 is on the same horizontal line as the center of the finishing roller 16, start the motor 36 and rotate the pinion gear 37. When the advancing/retracting frame 31 is advanced t)il, the finishing roller 16 held by the chuck 38 also moves forward, and as shown in FIG. 3, the tapered shaft 17 at the tip fits into the inner ring 15 and the outer ring 19 opens. 20. At this time, the stoppers 38 of the machine frame 47 hold both sides of the support frame 9.

Next, each cylinder 42 is activated so that the jaws 4 of each chuck 38 are
1 and pull the wires 21 and 22 in Fig. 2 in the direction of the arrows, each bearing frame 12 and 13 in Fig. 3 will be pulled down by the wires 21 and 22, and the finished product will be at the position indicated by the chain line in Fig. 5. When the protrusion 25 provided on the outer periphery of the roller 16 is brought close to the concrete layer 50 rotating together with the formwork 4 and the motor 48 is started and the finishing roller 16 is rotated, the concrete layer 50 springs inward. The water and dirt that are present are removed by the protrusions 25.

After that, reverse the previous operation to stop the motor 48 and wire 2.
1.22 is returned and the finishing roller 16 is raised together with each bearing frame 12, 13, and its rear part 1iII 1146 is grabbed by the chuck 38, and the pinion gear 37 is reversed by the motor 36 to remove the finishing roller 1G, the moving table 31, the machine frame 47, etc. Return to the starting position.

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

(1) A finishing roller for the inner surface of the concrete layer formed on the inner surface of the formwork is removably attached to a bearing frame that can be raised and lowered at the front and rear of the conventional formwork support mechanism, and this roller is attached to the inner surface of the concrete layer. The inner surface of the finished concrete pipe will have a good finish because moisture and dirt that have sprung up on the inner surface of the concrete layer will be removed by contacting or coming very close to it.

(2) The finishing roller is moved in and out of the formwork by being grasped by a chuck provided on the reciprocating frame provided at the rear of the formwork support mechanism, so it is easy to take the finishing roller in and out of the formwork. There are other effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the internal finishing machine of the present invention, FIG. 2 is a partially cutaway plan view of the same, and FIG. 3 is an enlarged longitudinal section of the bearing mechanism of the finishing roller. A side view, FIG. 4 is an enlarged longitudinal sectional front view of the advancing/retracting frame, and FIG. 5 is a sectional view showing the finished state of the concrete layer. 2... Formwork support mechanism, 12.13... Bearing frame, 16
...Inner finishing roller, 25...Protrusion, 31...
Advance/retreat frame. 38... Chuck, 48... Motor. Also ("rrr 11 applicant Hiraoka Metals") 7. Koso Co., Ltd. agent pull earth filling phase 11
Showa 3

Claims (2)

[Claims] (1) A pair of front and rear bearing frames that can be raised and lowered to removably and rotatably support an inner finishing roller that can be inserted into and pulled out of the mold are provided before and after the mold support mechanism that supports and rotates the mold; At the rear of the formwork support mechanism, a reciprocating frame that can approach and move away from the formwork is provided, and this reciprocating frame is provided with a chuck that can be opened and closed to grasp the rear part of the inner surface finishing roller,
2. A machine for finishing the inner surface of a concrete pipe, characterized in that a driving device for rotating the finishing roller is provided at the rear of the finishing roller. (2) The internal finishing machine for concrete pipes according to claim 1, characterized in that a spiral protrusion is provided on the outside of the internal finishing roller.