JP2688514B2 - Concrete pipe demolding method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is intended to take out a concrete pipe molded in a formwork device from the formwork device when manufacturing a concrete pipe used in, for example, an underdrain. The present invention relates to a demolding device used in.

[Conventional technology]

The structure of the formwork device that molds concrete pipes is disassembled,
A formwork apparatus is known that includes an outer frame that can be assembled and an inner frame that is supported in the outer frame and that can be reduced and expanded.

When manufacturing a concrete pipe using such a mold device, first, in the first step, the outer frame is disassembled and cleaned to apply the release agent, and the inner frame is cleaned to apply the release agent. Then, set the rebar in the outer frame in the next 2nd step, assemble the outer frame in the 3rd step, set the inner frame in the reduced state in the 4th step, and then set the inner frame in the 5th step. Expand and pour concrete in the sixth step to compact and cure.

When the curing was completed, the inner frame was reduced in the seventh step, the inner frame was pulled out in the eighth step, and then the outer frame was disassembled in the ninth step, and the concrete pipe was taken out in the tenth step.

In the formwork apparatus as described above, there are many steps, a problem that a temporary placement space for the pulled-out inner frame is required, and it becomes difficult to pull out the inner frame when the inner frame is damaged during temporary placement. There was a problem that it took time to insert the inner frame because the inner frame was inserted after the reinforcing bars were set on the outer frame.

Therefore, the applicant has provided an outer frame on the gantry so that the outer frame can be disassembled and assembled, and an inner frame that can be reduced and expanded is provided in the outer frame via a support mechanism in parallel with the gantry. A movable formwork device has been proposed (see Japanese Patent Application No. 59-170003).

Thus, the concrete pipe can be taken out only by reducing the inner frame and moving it in the outer frame.

However, the shrinkable and expandable inner frame had the following drawbacks.

[Problems to be solved by the invention]

The inner frame that can be reduced or expanded is an upper plate that forms the four sides of the inner frame,
The bottom plate and the both side plates are plates of a separate structure, and when the inner frame is expanded, the ends of the four plates come into contact with each other to form the inner surface shape of the concrete pipe. Even when the inner frame is expanded, a slight gap is likely to occur in the end pipes of the four plates, and the liquid concrete is poured into the formwork device (commonly called concrete milk).
Leaks into the interior through the above-mentioned gaps, and a problem that a step occurs in the concrete pipe when the outer surfaces of the contact parts of the four plates are not completely flush with each other. There was a problem that bubbles were easily generated in the tube.

A first object of the present invention is to solve such a problem, and a second object thereof is to provide a demolding device for demolding a concrete pipe more efficiently and continuously than a formwork device.

[Means for solving the problem]

In order to achieve the above-mentioned object, a method for removing a concrete pipe of the present invention is to provide a disassembled outer frame on a pedestal, and to provide a support mechanism for a middle frame of an integral structure in which a drawing gradient is formed in a product length direction. After the concrete pipe is manufactured by the formwork device that is provided so as to be movable in the product drawing direction along with the rise,
The outer frame was disassembled, the concrete pipe was pushed in the product drawing direction, and the middle frame was pressed in the direction opposite to the product drawing direction to remove the mold.

Further, the concrete pipe demolding device is a carrying device for carrying and positioning a formwork device having a decomposable outer frame and a middle frame in which a drawing gradient is formed in the lengthwise direction of the product, on the mounting surface of the base plate,
A carriage provided on the base plate so as to be movable in the mounting surface direction, an elevating frame provided to be movable up and down on the carriage, and a product section protruding from the elevating frame in the mounting surface direction at the tip. The product locking device includes a pull-out arm having a fixing member fixed thereto, a pressing member provided on the elevating frame so as to be capable of expanding and contracting in the mounting surface direction, and a product receiving roller provided on the base plate. When the member is in a position capable of pushing the end surface of the concrete pipe manufactured by the formwork apparatus, the pressing member is in a position capable of pressing the middle frame in the opposite direction.

The product receiving roller is composed of a first product receiving roller and a second product receiving roller which are provided so as to be able to travel on the base plate and an inclined surface that is lowered toward the placement surface provided on the base plate. The first product receiving roller is connected to the trolley via a chain, and the second product receiving roller is connected to the first product receiving roller via a chain.

(Operation)

After assembling the outer frame on the frame and placing concrete between the outer frame and the middle frame to produce a concrete pipe in the formwork device, the outer frame is disassembled to pull out the concrete pipe in the product extraction direction. When the inner frame is pushed in the opposite direction while being pushed to, the concrete pipe is separated from the middle frame because the middle frame has a drawing gradient, and the concrete pipe moved in the pulling direction is demolded from the formwork. It

The operation of the demolding device used in the demolding method described above is as follows.

First, the formwork device in which a concrete pipe is manufactured is moved and positioned on the mounting surface of the base plate by the transfer device.

Next, the outer frame of the formwork device is disassembled to expose the concrete pipe, and the dolly that has lifted the elevating frame is moved in the direction of the formwork device so that the product locking member at the tip of the extraction arm is moved to the formwork device. Let it pass above.

Next, when the elevating frame is lowered to lower the product locking member to the end face height of the concrete pipe, the pressing member becomes the end face height of the middle frame.

Next, when the pushing member is extended while moving the cart in the direction opposite to the formwork device, the product locking member pushes the end face of the concrete pipe in the product drawing direction, and at the same time, the end face of the middle frame that is in close contact with the concrete pipe is pushed. Since the pressing member presses in the opposite direction, the concrete pipe separates from the middle frame. Next, when the pressing of the pressing member is completed and the truck is continuously moved in the direction opposite to the formwork device, the concrete pipe is pulled out in the moving direction of the truck,
The lower surface of the concrete pipe moves while being supported by the product receiving roller, and completely removed from the formwork.

The mold from which the concrete pipe has been demolded is conveyed again by the conveying device, the demolded concrete pipe is removed from the product receiving roller, and one cycle of demolding is completed.

By repeating the above demolding operation, demolding work can be performed one after another.

〔Example〕

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

FIG. 4 shows a formwork apparatus A used in the present invention, in which a frame 1 is equipped with an outer frame 2 and an inner frame 3.

The outer frame 2 includes a bottom plate 4 on the base plate 1, a front plate 6, a rear plate 7, whose lower end is pivotally attached to the periphery of the bottom plate 4 by a hinge 5.
It is composed of both side plates 8 and can be assembled by standing up from the disassembled state as shown in FIG.

The inner frame 3 has an integral structure that cannot be reduced or expanded, and a drawing gradient of about 0.75%, which is a small dimension in the direction of arrow F, is formed on the surface of the inner frame 3 and is supported by the support mechanism 9.

The support mechanism 9 includes a support rod 10 having an inner frame 3 fixed to one end thereof.
A link member 12 pivoted at both ends to the other end of the support rod 10 and a column 11 standing on the gantry 1, and a gate-type column 13 provided between the rear plate 7 and the column 11. It is composed of horizontal beams 14.

The support bar 10 is supported by a horizontal beam 14, and a cam member 15 having an inclined surface 15a is provided on the other end side of the lower surface of the support bar 10 supported by the horizontal beam 14 to advance the support bar 10 ( As the cam member 15 rides on the horizontal beam 14 as it moves, the link member 12 in a fallen state stands up and the support rod 10
While moving horizontally in a state of being kept horizontal, the middle frame 3 moves upward in the direction of arrow F and rises away from the bottom plate 3.

The movement of the support rod 10 in the direction of arrow F can be moved until the stopper member 16 provided at the end of the cam member 15 comes into contact with the horizontal beam 14 and is blocked.

At the other end of the gantry 1, a support rod 10 is attached to a support 11 and a horizontal beam 14.
A lock mechanism 17 is provided for locking the state of being mounted on.

The lock mechanism 17 is composed of a lock handle 18 formed in a substantially V shape and a lock fitting 19 formed in a substantially arc shape and having one end pivotally attached to the lock handle 18. A ring-shaped portion 19a provided on the other end of the support rod 1 removably engages with an engaging protrusion 20 provided on the other end of the support rod 1.

Further, one end of the lock handle 18 is rotatably attached to the other end of the gantry 1 via a pin 21.

The lock mechanism 17 is a well-known lock mechanism that locks the lock handle 18 by pushing it down.
The support rod 10 placed on the 11 and the horizontal beam 14 is locked to hold the middle frame 3 at the regular concrete pipe manufacturing position.

The plan view of FIG. 1, the front view of FIG. 2 and the perspective view of FIG. 3 show a demolding apparatus B of the present invention and a carrier C used in the demolding apparatus B.

In the figure, a carrying device C is for carrying and positioning the formwork device A by means of two endless chain conveyors 22, and a sprocket 24 fixed to the output shaft of a motor 23.
And a chain 28 is wound around a sprocket 27 fixed to a drive shaft 26 rotatably supported by two bearings 25 and fixed to a driven shaft 30 rotatably supported by two bearings 29. The endless chain conveyor 22 wound around the two sprockets 31 and the two sprockets 32 fixed to the drive shaft 26 travels in the direction of arrow G by the forward rotation of the motor 23, and is indicated by the solid line in FIG. The formwork device A in the carry-in position shown in the figure stops positioning on the mounting surface 34 of the base plate 33 of the mold-release device B installed at the intermediate point, and after the mold-removing work, the carry-out position A'shown by a chain line.
Transported to

Grooves 35 for avoiding interference of the endless chain conveyor 22 are provided on the placement surface 34, and guide plates 36, 37 for guiding the front end surface and the rear end surface of the formwork apparatus A are provided.

On the base plate 33, on the side opposite to the mounting surface 34, two rails 38 are laid in a direction perpendicular to the endless chain conveyor 22, and the wheels 40 of the carriage 39 are rotatably mounted on the rails 38. .

One end of a chain 41 is fixed to the end face of the carriage 39 in the direction of arrow F, the chain 41 is stretched around a chain wheel 42 and a chain wheel 43 provided below the chain wheel 42, and the other end of the chain 41 is a wire at a point P. Connect to 44.

The wire 44 passes below the mounting surface 34, makes a U-turn with an intermediate pulley 45 provided on the rear end surface (left end surface in the drawing) of the base plate, and locks the wire vertically installed below the carriage 39. Element
It is fastened to 46 (see Fig. 2).

The chain wheel 42 is fixed to a drive shaft 48 rotatably supported by a bearing 47, and has a sprocket 49 provided on the drive shaft 48 and a sprocket 51 provided on an output shaft of the motor 50.
The chain 52 is wound around.

An elevating frame 53 is provided on the outer peripheral surface of the carriage 39 so as to be capable of ascending and descending, and a tip end of a piston 55 of a cylinder 54 provided on a lower base 39a of the carriage 39 has projections provided on both side surfaces of the elevating frame 53.
Abut 56.

Therefore, when the piston 55 extends upward, the elevating frame 53 rises along the carriage.

The elevating frame 53 is provided with two withdrawing arms 57 that project toward the mounting surface 34, and the product locking members 58 that project vertically are provided at the tips of the two withdrawing arms 57.
The tip of 57 is fastened to both ends of the connecting member 59 with bolts.

A pressing member 61 composed of a hydraulic jack is attached to a mounting base 60 provided on the elevating frame 53 between the two pull-out arms 57.

The rail 38 of the base plate 33 has a sloped surface 38a on the side close to the mounting surface 34 that decreases toward the mounting surface 34 over the range of the dimension 1 shown in FIG. 39a
The first product receiving roller 63 connected to the first product receiving roller 63 and the second product receiving roller 65 connected to the first product receiving roller 63 by the chain 64 are movably mounted on the rail 38 and the sloped surface 38a. .

The upper roller 63a of the first product receiving roller 63 is rotatable, but the upper roller 65a of the second product receiving roller 65 is not rotatable.

As shown in FIG. 3, the limit switch 66 attached to the side surface of the base plate 33 is for detecting the gantry 1 of the formwork apparatus A and positioning it at the demolding position on the mounting surface 34. The limit switches 67 and 68 regulate the forward and backward moving ends of the carriage 39.

Further, the limit switches 69 and 70 provided on the carriage 39 regulate the ascent and descent limits of the elevating frame 53, and limit switches 71 and 71 provided near the end of the pull-out arm 57.
Is for detecting the upper surface of the concrete pipe.

The hydraulic unit 72 mounted on the trolley 39 has a cylinder 54
And an operation source of the pressing member 61 and the like.

Next, a method of demolding the concrete pipe in the formwork apparatus A using the demolding apparatus B and the transporting apparatus C configured as described above will be described.

After the curing period has elapsed after the outer frame 2 has been assembled and concrete has been placed inside, the mold apparatus A is placed at the carry-in position shown by the solid line in FIG. 2, and the endless chain conveyor 22 is rotated by the rotation of the motor 23. After traveling in the direction of arrow G shown in FIG. 1, the gantry 1 of the formwork apparatus A operates the limit switch 66 to stop the motor 23, and the formwork apparatus A is positioned at the demolding position.

At this time, the front side plate 6 of the demolding device A faces the dolly 39, and the front and rear ends of the gantry 1 are inside the guide plates 36, 37.

On the other hand, the elevating frame 53 is at the upper limit, and the carriage 39 is waiting at the forward end position as shown in FIG. 2, but when it is confirmed that the formwork apparatus A is positioned, the motor 50 is rotated. , The carriage 39 pulled by the wire 44 moves toward the formwork device, and travels while pushing the first product receiving roller 63 and the second product receiving roller 65 that are abutted on the way, and the product locking member. When 58 passes over the concrete pipe, the limit switch 68 is activated and the carriage 39 is stopped.

At this time, the first and second product receiving rollers 63 and 65
Is at positions 63 'and 65' shown by the one-dot chain line in FIG. 2, and the upper surfaces of the rollers 63a and 65a are located lower than the concrete pipe.

Next, the piston 55 shrinks into the cylinder 54 and the lifting frame
53 falls.

At this time, since the outer frame 2 has already been disassembled, when the limit switch 71 hits the upper surface of the concrete pipe and the lowering of the elevating frame 53 stops, the product locking member 58 is in a position close to the rear surface of the concrete pipe. The pressing member 61 is located near the front surface of the middle frame 3.

Next, the carriage 39 moves in the direction of arrow F, and the product locking member 58
Pushes the rear surface of the concrete pipe,
Expands and presses the front end surface of the middle frame 3, so that the concrete pipe moves along the drawing gradient of the middle frame 3 and separates from the middle frame 3.

Next, the pressing member 61 is reduced to complete the pressing of the middle frame 3,
When the truck 39 is continuously moved as it is, the concrete pipe moves on the first and second product receiving rollers 63 and 65, but the first product receiving roller 63 pulled by the chain 62 moves the rail 38 from the slope 38a. Moving up, rollers 63 hit the front of the concrete pipe and support it.

When the carriage 39 is further moved, the second product receiving roller 65 similarly pulled by the chain 64 moves on the rail from the sloped surface 38a and abuts on the rear portion between the concretes to support the rear portion.

Thus, the demolded concrete pipe is placed on both product receiving rollers 63 and 65, and the dolly 39 is moved to the limit switch 67.
When it is operated, it stops together with the carriage 39.

Next, the motor 23 is started again, and the carrier C is moved to the arrow G.
The mold device A, which has moved in the direction and finished demolding, reaches the carry-out position shown by the alternate long and short dash line in FIG. 1, the motor 23 is stopped by the limit switch (not shown), Be shipped.

On the other hand, after elevating the elevating frame 53 to the upper limit, the concrete pipe is unloaded.

Thus, one cycle of demolding the concrete pipe is completed.

As described above, the demolding of the concrete pipe is continuously and efficiently performed.

〔The invention's effect〕

Since the present invention is configured as described above, it has the effects described below.

(1) Since the inner frame has an integral structure, there is no gap unlike the conventional inner frame that can be reduced or enlarged, and there is no problem of liquid concrete leaking into the inner frame.

In addition, since the inner frame has an integral structure, the problem of a step on the surface of the inner frame and the problem of aging distortion have been solved.

(2) As described above, since the leakage of concrete is eliminated and the surface of the inner frame is held on an accurate plane,
The problem of producing bubbles in the concrete pipe was also solved.

(3) Since the middle frame is provided with a drawing gradient, it is possible to pull out the concrete pipe in one step by pushing the concrete pipe in the pulling direction and pushing the middle frame in the opposite direction.

Therefore, the step of reducing and enlarging the middle frame becomes unnecessary.

(4) The extracted concrete pipe is automatically placed on the product receiving roller, so that the extraction work can be performed safely and efficiently.

(5) Since the demolding work is significantly labor-saving and efficient, the demolding work performed repeatedly can be performed extremely economically and smoothly.

[Brief description of the drawings]

1 to 3 show a demolding device of the present invention, FIG. 1 is a plan view of a demolding device including a conveying device, FIG. 2 is a front view of the same, and FIG. 3 is a perspective view of the same. FIG. 4 is a perspective view of a formwork device used in the present demolding device. A ... Formwork device, B ... Demolding device, C ... Conveying device, 1
…… Stand, 2 …… Outer frame, 3 …… Inner frame, 22 …… Endless chain conveyor, 23 …… Motor, 33 …… Base plate, 34 …… Mounting surface, 36,37 …… Guide plate, 38 ...... Rail, 39 …… Bogie, 4
1 …… chain, 42 …… chain wheel, 44 …… wire, 45 …… intermediate pulley, 50 …… motor, 53 …… elevating frame, 54 …… cylinder, 55 …… piston, 57 …… drawing arm, 58 …… Product locking member, 61 …… Pressing member, 62 …… Chain, 63 …… First product receiving roller, 64 …… Chain,
65 …… Second product receiving roller, 66,67,68,69,70,71…
…Limit switch.

Claims (3)

(57) [Claims] 1. A disassembled outer frame is provided on a gantry, and an intermediate frame having an integral structure in which a withdrawal gradient is formed in the lengthwise direction of the product is provided so as to be movable in the product withdrawal direction via a support mechanism. After manufacturing concrete pipe by placing concrete in the mold device, the outer frame is disassembled, the concrete pipe is pushed in the product drawing direction, and the middle frame is moved in the opposite direction to the product drawing direction. Demolding method for concrete pipes by pressing against. 2. A carrying device for carrying and positioning a formwork device having a disassembled outer frame and a middle frame having a drawing gradient formed in a lengthwise direction of a product on a mounting surface of a base plate, and the base plate. A dolly movably provided in the mounting surface direction, an elevating frame provided on the dolly so as to be able to move up and down, and a product locking member fixed to the tip protruding from the elevating frame in the mounting surface direction The pulling arm, the pressing member provided on the elevating frame and expandable / contractible in the mounting surface direction, and the product receiving roller provided on the base plate, and the product locking member is manufactured by the formwork apparatus. A demolding device for a concrete pipe configured such that the pressing member is in a position capable of pressing the middle frame in the opposite direction when the end face of the concrete pipe is pressed. 3. The product receiving roller, wherein the first product receiving roller and the second product receiving roller are provided so as to be able to travel on the base plate and a sloped surface provided on the base plate and decreasing toward the mounting surface. The product receiving roller, the first product receiving roller is connected to the base plate via a chain, and the second product receiving roller is connected to the first product receiving roller via a chain. The demolding device for a concrete pipe according to claim 2, wherein: