JPS5938088B2 - Internal finishing machine for concrete pipes - Google Patents

Description

[Detailed Description of the Invention] This invention rotates the formwork and pours concrete into the formwork by centrifugal force to form a concrete layer in the formwork. The present invention relates to an internal finishing machine for a concrete pipe formed on the inner surface of a formwork in a method of manufacturing a concrete pipe.

When manufacturing concrete pipes by centrifugal forming, there is a well-known method in which hardened concrete is poured into a formwork and the inside of the concrete layer formed on the inner surface of the formwork is pressurized with compaction rollers. This invention differs from the conventional concrete pipe manufacturing method using compaction rollers as described above, in that the paste-like concrete layer is placed in a rotating formwork, and the inner surface of the paste-like concrete layer that sticks to the formwork due to the salt center 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.

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 a reciprocating member is provided at the rear of the formwork support mechanism so that it can move toward and away from the formwork, and a chuck that can be freely opened and closed by grasping the rear part of the inner finishing roller is installed on this reciprocating member. 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 1 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. be.

5 is a base fixed on the floor 1, 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 and 1, support frames 8 and 9 with open front and rear sides, respectively, are provided as shown in FIG.
, 9 are provided with bearing frames 12, 13 that vertically move up and down along left and right guide rails io, ii.

The inside of the bearing frame 12 is provided with a spherical concave opening as shown in FIG. A tapered surface that fits the tapered shaft 17 at the tip of the tip 16 is formed.

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

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 surface 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 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 1 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 30.

Guide rails 34 are fixed above and below the guide frame 30, and as shown in FIG. 32 and a wheel 33 rotating around a vertical axis are engaged 17 to accurately guide the advancing/retracting frame 31 back and forth. The rack gear 35 is fixed as such, and a pinion gear 31 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 to drive the forward/backward frame 31.

Chucks 38 are provided at the front and rear of the lower part of the advancing/retracting frame 31, respectively.

As shown in FIG. 4, this chuck 38 includes a pair of left and right pawls 41 pivotally connected to the front and rear support plates 40 of the advancing/retracting frame 31 by a pair of left and right shafts 39, and a hydraulic, air, or electric power cylinder that opens and closes the pawls 41. It consists of 42.

A shaft 43 provided at the lower end of the lifting rod 44 of the cylinder 42 is loosely fitted into an elongated hole in the upper part of the winter melon 41, and both ends of this shaft 43 are loosely fitted into vertical holes 45 provided in the support plate 40. The claws 41 are opened and closed by moving 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 41 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 41 to hold both sides of the support frame 9 when the machine frame 41 moves forward and prevent the machine frame 47 from being rotated by the pressure of one drive of the rollers 16.

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, the formwork is placed on rollers 3 in a known manner, concrete is poured in, and the formwork 4 is rotated to form an inner concrete layer 50 of the formwork 4 as shown in FIG.

Next, under the condition that each of the bearing frames 12 and 13 is in the northward position and the opening 20 of the inner ring 15 is on the same horizontal line as the center of the finishing roller 16, the motor 36 is started and the pinion gear 37 is rotated, and the advancing/retracting frame 31 is When the finishing roller 16 is moved forward, the finishing roller 16 held by the chuck 38 also moves forward.
As shown in FIG. 3, the tapered shaft 17 at the tip fits into the inner ring 15, and the outer ring 19 fits into the opening 20.

At this time, the stoppers 38 of the machine frame 41 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, the front receiving frames 12 and 13 in FIG. 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, the finishing roller 16 is rotated and the concrete layer 50 is rotated.
Water and dirt that have sprung up on the inner surface of the container 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 shaft 46 is grabbed by the chuck 38, and the pinion gear 37 is reversed by the motor 36, and the finishing roller 16, the moving table 31, Return to the starting position such as machine frame 41.

This invention has the following effects due to its configuration and operation.

(1) A roller for controlling the inner surface of the concrete layer formed on the inner surface of the form is removably attached to a bearing frame that can be raised and lowered at the front and rear of a conventional formwork support mechanism, and this roller is attached to the inner surface of the concrete layer. Since moisture and dirt that have sprung up on the inner surface of the concrete layer are removed by bringing it into contact with or very close to the concrete layer, the inner surface of the resulting concrete pipe will have a good finish.

(2) Since the finishing north roller is moved into 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, it is easy to take the finishing L roller into and out of the formwork. There are other effects.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the inner finishing machine of the present invention, Fig. 2 is a partially cutaway plan view of the same, and Fig. 3 is an enlarged longitudinal cross-sectional side view of the bearing mechanism of the finishing L roller. 4 are enlarged longitudinal sectional front views of the advancing/retracting frame, and FIG. 5 is a sectional view showing the structure and condition of the concrete layer. ) 2... Formwork support mechanism, 1213...
...Bearing frame, 16 ...Inner surface finish and roller, 25
...Protrusion, 31...Advance/retreat frame, 38...
... Chuck, 48 ... Motor.

Claims (1)

[Scope of Claims] 1. A pair of front and rear bearings 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 before and after a mold support mechanism that supports and rotates the mold. A frame is provided, and behind the formwork support mechanism there is provided an advancing/retracting frame that can freely approach and move away from the formwork, and this advancing/retracting frame is provided with a chuck that can be opened and closed to grasp the rear part of the self-explanatory finishing roller. A machine for finishing the inside of a concrete pipe, characterized in that a drive device for rotating the roller is installed at the rear of the machine. 2. Conc I according to claim 1, characterized in that a spiral protrusion is provided on the outside of the inner finishing roller.
Inner finishing of J-tube