JP2001062813A - Manufacture of concrete segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing which may not use an air permeable sheet for releasing air like a prior art in the case of manufacturing a concrete segment by a superplasticized concrete. SOLUTION: Totally two superplasticized concrete filling ports 15 are provided at both ends of an upper cover 13 for constituting a form 5 in which a circular arc-like surface of a concrete segment 7 is convexly directed upward. An opening 29 for releasing the air is provided at a top of the cover. Form vibrators 33 are mounted at both right and left sides of the cover. The opening is coated by an opening cover 31 after concrete is filled. A shield plate 25 is provided at a connector for connecting a hose 17 to the filling port to open or close a channel of the concrete by sliding the plate 25 in an anti-parallel to the cover 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an apparatus for manufacturing a concrete segment used for constructing a tunnel or the like.

[0002]

2. Description of the Related Art For example, when a tunnel is constructed by a shield method, a segment is used as a lining material. In addition to tunnels, hollow cylindrical bodies may be constructed underground as the basis for structures such as high-rise buildings and bridge piers. It is connected by bolts. This segment includes a steel segment formed by welding steel materials, a concrete segment formed by using reinforcing steel and concrete, and the like.

[0003] Among them, the concrete segment is manufactured by using hardened concrete or by using high-fluidity concrete (or called self-compacting concrete). In the case of using hardened concrete, the form is placed on a powerful table vibrator and the concrete is poured while vibrating so that even low-fluidity concrete can be filled into every corner of the form. The formwork is
A concrete segment that forms a part of the hollow cylindrical body and has an arc surface is placed so that the arc surface is convex upward.

In this case, since the concrete is hardened concrete, the curing time is short, but the noise due to the vibration becomes severe and the working environment is deteriorated. In addition, many air bubbles remain in the concrete surface layer inside the upper lid that forms the mold and is in contact with the upwardly facing arc surface. Therefore, before the concrete hardens, the top lid must be removed, and rough finishing and ironing must be performed.

When using high-flow concrete, special measures have been taken to release air when pouring high-flow concrete. That is, JP-A-10-159
As shown in JP-A-21, the entire surface of the upper lid constituting the mold is made of a perforated steel plate, and a special ventilation sheet is attached inside the perforated steel plate. This ventilation sheet passes only air without passing through high-fluidity concrete, and is attached each time concrete is poured. The hardened concrete adheres to the ventilation sheet after use, and is difficult to reuse.

[0006]

However, when a concrete segment is manufactured using conventional high-fluidity concrete, the above special ventilation sheet must be attached, and this attaching work is troublesome and disposable. Disposal of the ventilation sheet of the above has become a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a manufacturing apparatus which can manufacture a concrete segment using high-fluidity concrete and does not need to use a ventilation sheet. .

[0008]

In order to solve the above-mentioned problems, a first aspect of the present invention relates to a concrete segment manufacturing apparatus using high-fluidity concrete, wherein a concrete segment having a circular arc surface convex upward. And a high-fluidity concrete injection port provided in the mold, an upper lid constituting the mold, an opening provided in the upper lid to allow air to escape, and a mold vibrating device attached to the upper lid. An apparatus for manufacturing a concrete segment, comprising:

[0009] The second invention is further characterized in that the high fluidity concrete inlet is provided at both ends of the upper lid, and the opening is provided at the top of the upper lid. Device. This allows
The concrete is poured such that the filling is performed from both ends of the top lid to the top.

According to a third aspect of the present invention, the high fluidity concrete inlet is provided with a connecting portion to which a hose for injecting the high fluidity concrete is connected, and a lower portion of the connecting portion is connected to the upper lid. An apparatus for manufacturing a concrete segment, comprising a blocking plate capable of sliding substantially parallel to open and close a flow path of high-fluidity concrete.

According to a fourth aspect of the present invention, in the concrete segment manufacturing apparatus, the opening is provided with an opening lid which is closed in contact with the high-fluidity concrete poured into the opening. is there.

In a fifth aspect of the present invention, there is further provided a drop lid device in which a drop lid having a plurality of holes can be dropped into the connection portion from above the connection portion to the inside with the blocking plate being opened again. An apparatus for manufacturing a concrete segment, comprising:

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. First, FIG.
As shown in the overall view of FIG. 2 and FIG. 2, in the concrete segment manufacturing apparatus 1, a form 5 is installed on a form base 3. The formwork 5 is for manufacturing with the arc surface of the concrete segment 7 facing upward, and the arc-shaped inner peripheral surface of the concrete segment 7 is formed by the upper surface of the formwork base 3. The circumferential direction of the arc surface is formed by the form end plate 9. A side frame 11 forms an axial end surface of the hollow upper cylindrical body of which the arc surface of the mold 5 forms a part. Then, the outer lid surface is formed by the upper lid 13.

At both ends of the upper lid 13, there are provided injection ports 15 for injecting high-fluidity concrete.
As a connecting portion to which a hose 17 for injecting high-flowable concrete is connected, the injection port 15 is shown in FIGS.
A male cam lock joint 19 is provided as shown in FIG. The male joint 19 is attached to a pedestal 21 fixed to the upper lid 13 by welding or the like with two pairs of bolts 23.

Between the male joint 19 and the pedestal 21,
A blocking plate 25 is provided. This blocking plate 25 is
It slides almost in parallel to and can open and close the flow of highly fluid concrete. That is, a hole 27 having the same diameter as the inside diameter of the male joint 19 is formed at one end of the blocking plate 25 in the sliding direction, and can slide between the two pairs of bolts 23 described above. The length in the sliding direction is sufficiently long. When the hole is sufficiently slid, the hole 27 is completely disengaged from the male joint 19, and the flow of concrete is closed.

An opening 29 is provided at the top of the upper lid 13 to allow the inside air to escape when high-flowable concrete is poured. The opening 29 is formed to be elongated along the axial direction of the concrete segment (see FIG. 2), and an erector 29A is provided around the opening 29. Also,
An opening cover 31 for covering the opening 29 is provided. The area of the opening lid 31 is slightly smaller than the area of the opening 29, so that it can be dropped and come into contact with the high-fluid concrete inside. A form vibrator 33 is attached between the opening 29 and the injection port 15. This form vibration device 33 includes:
It is easily attached to and detached from the pedestal 33A fixed to the upper lid 13.

A cam lock female side joint 35 (see FIG. 5) to be fitted to the cam lock male side joint 19 is provided at the lower end of the hose 17. A valve 37 is provided directly above the female joint 35 and can be opened and closed by operating a handle 39. With this valve 37, the pouring speed and pouring amount of the high-fluidity concrete can be manually adjusted. The hose 17 is made of a flexible material and has an inner diameter of, for example, 125 to 150 mm.

The two hoses 17 are joined by a hose cam lock joint 43 provided at the bottom of a concrete bucket 41 (FIGS. 3 and 4). The hose cam lock connector 43 is detachable by manually turning the handle 45. Further, the hose cam lock connectors 43 are provided at the lower ends of the curved tubes 46, respectively, and determine the direction of the hose 17 in advance. The bending pipe 46 may be an elbow pipe having a large curvature.
In this way, the hose 17 becomes detachable at both ends and can be washed with water.

The concrete bucket 41 has a volume capable of storing a sufficient amount of high-fluidity concrete therein, is lifted to a predetermined height by a crane 49 by left and right suspension hooks 47, and sends the high-fluidity concrete by gravity. Take. Legs 51 are provided on the four sides at the lower part of the concrete bucket 41, and the curved tube 46 is mounted between the legs 51 at a position where it is not damaged.

(Operation) The high-fluidity concrete sent from the concrete mixer is supplied to the concrete bucket 4.
1 The concrete bucket 41 is lifted by a crane 49 so that the pressure required for injection is obtained. Then, the operator manually opens the valve 37 at the lower end of the hose 17. The injection speed and the injection amount are adjusted while the operator visually observes. At this time, the blocking plate 25 is in an open state.

When the injection is sufficiently performed, the valve 37 is closed, and the blocking plate 25 is slid and closed. An opening cover 31 is dropped into the opening 29 to cover the opening. The cam locks 19 and 35 at the lower end of the hose 17 are disengaged, and the hose 17 and the concrete bucket 41 are moved so that the next high-fluid concrete is poured into the form 5. The mold 5 into which the high-fluid concrete has been poured is cured in a space filled with steam at a predetermined temperature, and then is released.

(Example) FIG. 8 shows the components of the high-fluidity concrete of the example actually carried out using the apparatus of the first embodiment, and FIG. 9 shows the time change of the ambient temperature during curing.
Shown in The components in summer are shown in FIG. 8A, and the components in winter are shown in FIG. In FIG. 8, fine aggregate S means sand or the like, and coarse aggregate G indicates gravel or the like. A high-performance water reducing agent is an agent that enhances the compatibility between cement and water and can increase the fluidity without adding too much water.

The only difference between summer and winter is that the cement component usually uses cement in summer and uses early-strength cement in winter. In addition, the high fluidity concrete referred to in this specification is a so-called slump flow, that is, a value measured on the basis of a dimension measured by spreading a predetermined amount of concrete into a predetermined shape on a plane and then freely breaking and spreading. Concrete that is 60-70 cm.

In the summer, the air temperature was kept at 50 ° C. for 2.33 hours, and a curing time of 6 hours was provided as a whole. The compressive strength at this time is 172 kgf / cm2
Met. FIG. 9 shows the time change of the temperature in this case. The first hour is a preliminary time without hot steam. The last one hour is a demolding preparation time for gradually lowering the temperature and sufficiently reducing the difference from the outside air temperature, and is for preventing cracks.

The winter season is almost the same, but the initial temperature is low because the outside air temperature is low. The time for keeping the temperature at 50 degrees was 2.25 hours. The compressive strength of the concrete in this case was 155 kgf / cm2.

(Effects of the Embodiment) According to the first embodiment described above, the upper cover 13 is vibrated by the form vibration device 33, whereby the fluidity of the high-fluidity concrete near the upper cover 13 can be further increased. Air can escape from the opening 29. Therefore, it is not necessary to make the entire surface of the upper cover 13 a perforated steel plate to allow air to escape as in the conventional case,
No ventilation sheet is required. It is only necessary to provide a small opening 29 for allowing air to escape in a part of the upper lid 13.

Also, unlike the conventional case of using hardened concrete, the entire form 5 is not vibrated, but only the vicinities of the upper lid 13 are vibrated. Therefore, vibration can be reduced and noise can be reduced. In addition, by providing the opening 29 for releasing air at the top of the upper lid 13, air bubbles can be less likely to collect inside the upper lid 13 having an arc surface. In addition, by providing the high-fluidity concrete injection port 15 at both ends of the upper lid 13, it is possible to make it difficult for bubbles to collect at both ends located at a position lower than the top.

Further, at the moment when the form 5 is filled with the high-fluidity concrete, the blocking plate 25 can be slid to close the flow path of the high-fluidity concrete, so that the high-fluidity concrete can be released from the opening 29 through which the air escapes. Overflow can be prevented. In addition, when the hose 17 is removed after the high-flowable concrete is injected, the high-flowable concrete can be prevented from flowing into the injection port. Also, by covering the opening 29 with the opening cover 31 and contacting the high-fluidity concrete poured into the inside, it is possible to prevent a step of concrete from being formed in the portion of the opening 29, It can be prevented that this part needs to be finished.

(Other Embodiments) In the above embodiments, high-fluidity concrete was injected by gravity. However, in other embodiments, compressed air was injected to perform injection at a higher pressure. Can also be used. That is, the concrete bucket 41 can be a closed type, and a compressed air hose can be connected to the concrete bucket 41 to send compressed air from a compression pump.

A part of the hose 17 is formed as a rubber tube, and the tube is squeezed from three sides by a rotating roller.
It is also possible to perform injection by pulsating pressure. As such a conventional method, for example, a concrete pump, a ground pump, or the like can be used.

In the above embodiment, the injection port 15 is provided at both ends of the upper lid 13, but in other embodiments, the injection port 15 may be provided in the form end plate 9, the form side frame 11, or the like. It is possible.

In the above embodiment, the injection port 1
5 is provided with a blocking plate 25 for blocking the flow of the high-fluidity concrete, but between the blocking plate 26 and the upper surface of the poured concrete, that is, the arc surface, the pedestal 21 and Extra concrete is left for the thickness of the upper lid 13. That is, the shape of the injection port 15 remains as a short columnar projection at two locations per concrete segment. This extra concrete must be trimmed before the concrete is completely cured. Although this finishing is a light work compared to the case of the conventional hardened concrete, it is desirable to further devise it.

In another embodiment, a drop lid device 53 can be used, for example, as shown in FIG. 7, to make this finishing easier. The drop lid device 53 has a drop lid 55 having an inner diameter slightly smaller than the inner diameter of the male joint 19 of the inlet 15. The drop lid 55 has the same radius of curvature as the arc surface of the concrete segment 7. A plurality of holes 57 are formed in the drop lid 55.

The center of the upper surface of the drop lid 55 is the rod 5
9, and this rod 59 penetrates a support base 61 which is put on the upper edge of the male joint 19. A stopper 63 is attached to the rod 59 above the penetrating portion. With this stopper 63, the drop lid 55 is dropped to a predetermined depth.

The use of the drop lid device 53 is based on the hose 1
7 is disconnected, and in a state where the fluidity of the concrete is reduced to some extent, the blocking plate 25 is opened again, and the support base 61 of the device 53 is put on the male joint 19 as a connecting portion, and the rod 59 is pushed in. Then, the drop lid 55 is dropped into the male joint 19 to a predetermined depth. As a result of this dropping, the extra concrete 7A inside is protruded upward through the hole 57 of the dropping lid 55. Then, by rotating the lever 59A provided on the upper end of the rod 59, the dropping lid 55 is rotated, and it becomes possible to scrape off excess concrete 7A.

In this way, by scraping off the excess concrete 7A and removing it in advance, it is possible to make the finishing simpler. In the above embodiment, the adjustment of the injection amount of the high-fluidity concrete is performed by the valve 37 provided at the lower end of the hose.
7 is partially connected to a rubber tube, and the rubber tube is sandwiched by a plurality of rollers so that the hose 1
It is also possible to perform adjustment by changing the cross-sectional area inside 7.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. The same parts as those in the first embodiment (FIGS. 1 to 9) are denoted by the same reference numerals. As shown in FIG. 10, unlike the first embodiment, the two hoses 17 have a hose holder 62. The hose holder 62 has the hose 17 in the inlet 1.
5 for each hose 17
Guides 64 for guiding the arc guides in a predetermined arc shape, horizontal bars 65 for holding the respective arc guides 64 at a predetermined interval in a symmetrical state, and chains 67 for hanging the bars 65 to the concrete bucket 41. Consists of

In the lower part of the concrete bucket 41, instead of the leg 51 of the first embodiment, a skirt 69 is provided.
Is provided, and the curved tube 46 is mounted in the skirt 69 and is arranged at a position where it is not damaged.

In the first embodiment, as shown in FIGS. 5 and 6, a blocking plate 25 provided between the male joint 19 and the base 21 is guided by two pairs of bolts 23 in a plane. However, in the second embodiment, as shown in FIG. 11, the slide is guided by a pair of guide members 71.

That is, the flange 73 is attached to the pedestal 21 fixed to the upper lid 13 by welding or the like with two pairs of bolts 23. Between the pedestal 21 and the flange 73, the shielding plate 2 is guided from above and below.
5 are arranged. The guide member 71 for guiding the blocking plate 25 on both sides from the left and right, that is, in a plane,
Alternatively, it is welded to the flange 73.

At the center of the flange 73, an injection port 15 is provided.
Is formed, and a short cylindrical nipple 75 protrudes from an edge of the hole. A male joint 1 is attached to a male screw 75A (see FIG. 12) formed on the outer periphery of the nipple 75.
9 is attached by screwing a female screw 19A formed on the inner periphery. The cam 35A provided on the female joint 35 is rotated by the cam lever 35B, so that the cam 35A is fitted deeply into the concave portion 19B of the male joint 19, and the cam is locked. This is the same in the first embodiment.

In the second embodiment, instead of the drop lid device 53 of FIG. 7, a drop lid device 77 having another structure is provided as shown in FIGS. That is, the drop lid device 77 is provided with a drop lid 79 that can be temporarily fixed to the hole 27 of the blocking plate 25. A groove 81 (FIG. 14 (C)) is formed all around the inner peripheral edge of the hole 27, and an O-ring 83 for fitting in the groove 81 and performing temporary fixing.
(FIG. 14B) is attached to the entire periphery of the drop lid 79.

On the other hand, a female joint 35 similar to that provided at the lower end of the hose 17 is prepared, and a socket 85 is screwed over the female joint 35, and this socket 8
A bolt 89 is attached to the center of a top plate 87 welded to the upper end of the fifth plate 5. That is, a nut 93 is welded to the lower edge of the bolt hole 91 formed in the center of the top plate 87, and the nut 93 is welded.
The bolt 89 is screwed with the head 95 facing upward. The bolt 89 has a length sufficient to allow the lower end to drop and reach the lid 79 by being screwed. The lower end has a conical shape, and a conical engagement recess 97 that engages with the lower end is formed on the upper surface of the drop lid 79.

According to the drop lid device 77, the hose 1
7. The operator manually opens the valve 37 at the lower end of the pipe 7 and after the concrete is sufficiently injected, closes the valve 37, slides and closes the blocking plate 25, removes the cam locks 19 and 35 at the lower end of the hose 17, and removes the hose 17 Then, the concrete bucket 41 is moved, and the flow of the high-fluidity concrete into the next form 5 is started. Then, the drop lid device 77 is locked and attached by the female joint 35. Also,
The drop lid 79 is temporarily fixed to the hole 27 of the blocking plate 25.

After a while, the blocking plate 25 is slid in the opposite direction. The bolt 89 is attached to the head 95
Is rotated and screwed in, and the lower end is dropped to reach the lid 79. As a result, the drop lid 79 is pushed and falls, and further comes into contact with the upper surface of the cast concrete, and pushes the concrete back into the formwork 5.

At this time, since the concrete is opened to the atmosphere through the opening 29, the concrete is pushed back smoothly. Thereby, it is possible to prevent the excess concrete from being left for the thickness of the pedestal 21 and the upper lid 13, and finishing is unnecessary. In addition, the lower surface of the drop lid 79 receives the pressure of the concrete, and does not sink in the concrete. In the above embodiment, the drop lid 79 is used.
The temporary fixing is based on the elasticity of the O-ring 83. However, in other embodiments, the temporary fixing can be performed by a spring.

(Third Embodiment) In the second embodiment, the O-ring 83 is attached to the entire periphery of the dropping lid 79 to temporarily fix to the blocking plate 25. However, FIGS. As in the third embodiment, a screw may be formed on the entire periphery of the drop lid 79 to temporarily fix it. The same parts as those in the above embodiment are denoted by the same reference numerals. That is,
A female screw 101 is provided all around the inner peripheral edge of the hole 28 of the blocking plate 25.
(FIGS. 16 to 18) are formed, and a male screw 103 screwed with the female screw 101 is formed on the entire periphery of the disc-shaped dropping lid 79. In the center of the drop lid 79, a short cylindrical female hole 105 for positioning is formed.
A female screw 107 is formed at the center of the bottom of 5. In addition, stoppers 108 are formed at both ends of the blocking plate 25, respectively, and the stoppers 108 are locked to the ends of the pedestal 21 to position the blocking plate 25.

On the other hand, a socket 85 placed over the female joint 35 similar to that provided at the lower end of the hose 17
At the upper end of the nut, another nut 109 is screwed and fixed to the lower end of a bolt 89 screwed to the nut 93.
A short columnar projection 111 that fits into the female hole 105 and is positioned is welded to the lower surface of 09. Furthermore, this projection 1
At the center of the lower surface of 11, a male screw 113 screwed to the female screw 107 is provided.

According to the drop lid device 77, after the concrete is sufficiently poured, the valve 37 is closed,
The blocking plate 25 is slid and closed, and the dropping lid device 77 is locked and attached by the female joint 35. This blocking plate 25
In the hole 28, a dropping lid 79 is previously set with screws 101,
It is temporarily fixed by 103. Therefore, the concrete channel is blocked by the blocking plate 25.

After a while, the bolt 89 is screwed by rotating the head 95, the lower end is dropped and reaches the lid 79. When the rotation is further performed, the protrusion 11
1 is fitted into the female hole 105 to perform positioning, and at the same time, the male screw 113 is screwed into the female screw 107. Subsequently, the rotation is performed, so that the rotational force is transmitted to the drop lid 79, and the male screw 103 of the drop lid 79 eventually becomes the female screw 101.
Then, the drop lid 79 falls and further comes into contact with the upper surface of the cast concrete, and pushes the concrete back into the formwork 5. Thus, the drop lid 79 is provided with the screws 103, 10
Since it is temporarily fixed by 1, it can sufficiently withstand the pressure of the concrete (for example, about 10 to 20 kgf per one dropping lid 79).

[0051]

As described above, the first, second, third,
According to the invention of the fourth or fifth aspect, by vibrating the upper lid by the form vibration device, the fluidity of the high-fluidity concrete near the upper lid can be further increased. There is no need to use perforated steel sheets, and no ventilation sheet. It is only necessary to provide an opening for allowing air to escape in a part of the upper lid. Also, unlike the case of using conventional hardened concrete, the entire formwork is not vibrated, but only the vicinity of the upper lid is vibrated, so that vibration can be reduced and noise can be reduced.

According to the second, third, or fourth aspect of the present invention, by providing an opening for releasing air at the top of the upper lid, air bubbles can be less likely to collect inside the upper lid having an arc surface. In addition, by providing the high-fluidity concrete inlets at both ends of the upper lid, bubbles can be less likely to accumulate at both ends located at a position lower than the top.

Further, according to the third, fourth or fifth aspect of the present invention, further, at the moment when the mold is full of the high-flowable concrete, the blocking plate can be slid to close the flow path of the high-flowability concrete. Therefore, it is possible to prevent the high-fluidity concrete from overflowing from the opening that allows air to escape.

According to the fourth or fifth aspect of the present invention, the opening is further covered with the high-fluid concrete poured into the opening by covering the opening with a lid, so that the opening is covered with concrete. Steps can be prevented from being formed,
It can be prevented that this part needs to be finished.

According to the fifth aspect of the present invention, the flow path of the high-fluidity concrete is further closed by the blocking plate, the hose for injection is disconnected, and then the blocking plate is opened again and connected by the drop lid device. By dropping the lid from above the part into the inside, the high-fluidity concrete left inside the connection part is pushed out from the plurality of holes of the drop lid and the finish at the connection part can be simplified.

[Brief description of the drawings]

FIG. 1 is a front view showing a concrete segment manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view showing the concrete bucket of FIG. 1;

FIG. 4 is a plan view of FIG. 3;

5 (A) is a longitudinal sectional view showing the high-fluidity concrete injection port of FIG. 1, and FIG. 5 (B) is a plan view of FIG.

6 (A) is a diagram showing the operation of FIG. 5 (B). FIG. 6 (B) is a right side view of FIG. 5 (A).

7 (A) is a perspective view, and FIG. 7 (B) is a longitudinal sectional view showing a use state of FIG. 5 (A), showing a drop lid device used for the injection port of FIG. 5;

FIG. 8 shows components of the high fluidity concrete according to the embodiment of the present invention, wherein (A) is a component table for summer and (B) is a component table for winter.

FIG. 9 is a diagram showing a time change of an ambient temperature for curing a concrete segment according to the embodiment of the present invention.

FIG. 10 is a front view showing a concrete segment manufacturing apparatus according to a second embodiment of the present invention.

11 (A) is a plan view, FIG. 11 (B) is a longitudinal sectional view of FIG. 10 (A), and FIG. 11 (C) is an explanatory view for explaining the operation of FIG. 10 (B). is there.

FIG. 12 is a longitudinal sectional view showing a connecting portion for connecting a hose to the inlet of FIG. 11;

13 is a longitudinal sectional view of the drop lid device attached after the connection of FIG. 12 is disconnected.

14 shows a main part of FIG. 13; (A) is a partial view for explaining the operation of the drop lid of FIG. 13; (B) is an enlarged view of the main part of (A); (D) is a side view of the drop lid of (A), and (E) is a plan view of (D).

FIG. 15 is a perspective view of a drop lid device provided in the concrete segment manufacturing device according to the second embodiment of the present invention.

FIG. 16 is a longitudinal sectional view of FIG.

FIG. 17 is an exploded perspective view of the lower half of FIG.

18A is a perspective view showing each part of FIG. 16; FIG. 18A is an overall perspective view of a bolt 89 of FIG. 16; FIG. 18B is an enlarged exploded perspective view of part B of FIG. It is an enlarged view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Concrete segment manufacturing apparatus 3 Formwork base 5 Formwork 7 Concrete segment 9 Formwork end plate 11 Side frame 13 Top lid 15 Inlet 17 Hose 19 Cam lock male side joint 21 Pedestal 23 Bolt 25 Blocking plate 27 Hole 29 Opening 31 Opening Lid 33 Formwork vibration device 35 Cam lock female side joint 37 Valve 39 Handle 41 Concrete bucket 43 Hose cam lock connector 45 Handle 46 Curved tube 47 Hanging hook 49 Crane 51 Leg 53 Drop lid device 55 Drop lid 57 Hole 59 Rod 61 Support base 62 Hose holder 63 Stopper 64 Arc guide 65 Bar 67 Chain 69 Skirt 71 Guide material 73 Flange 75 Nipple 77 Drop lid device 79 Drop lid 81 Groove 83 O-ring 85 Socket 87 Top plate 89 Belt 91 bolt holes 93 nuts 95 head 97 engaging recesses 101 female thread 103 male thread 105 Mesuana 107 female thread 108 stopper 109 nut 111 protrusion 113 male thread

Continued on the front page (72) Inventor Fumio Endo 315-2 Hara, Numazu-shi, Shizuoka Prefecture Within Nippon Segment Industry Co., Ltd. (72) Inventor Shigeru Kaneko 710-23, Futaba, Ashikaga-shi, Tochigi F-term (reference) 4G053 AA13 BF02 BF05 EA16 EB02

Claims (5)

[Claims] 1. An apparatus for manufacturing a concrete segment using high-fluidity concrete, comprising: a mold in which an arc surface of the concrete segment is upwardly convex; a high-fluidity concrete injection port provided in the mold; A concrete segment manufacturing apparatus, comprising: an upper lid, an opening provided in the upper lid to allow air to escape, and a form vibration device attached to the upper lid. 2. The concrete segment according to claim 1, wherein the high-fluidity concrete inlet is provided at both ends of the top cover, and the opening is provided at a top of the top cover. apparatus. 3. A connecting portion to which a hose for injecting the high-fluidity concrete is connected is provided at the high-fluidity concrete injection port, and a lower portion of the connecting portion slides substantially parallel to the upper lid. 2. A shielding plate which can open and close a flow path of high-fluidity concrete is provided.
Or the concrete segment manufacturing apparatus according to 2. 4. The concrete according to claim 1, wherein the opening is provided with an opening lid which is closed in contact with the high-fluidity concrete poured therein. Segment manufacturing equipment. 5. A drop lid device which can drop a drop lid having a plurality of holes into the connection section from above the connection section into the inside of the connection section while the blocking plate is opened again. The apparatus for producing a concrete segment according to claim 3 or 4, wherein: