JPS63297698A - Concrete placing device - 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 (a) Field of Industrial Application The present invention relates to a concrete pouring device suitable for use in constructing tunnel linings, particularly concrete linings, using cast-in-place concrete.

(b), Conventional technology Recently, construction of I-channel linings, especially concrete linings, has been carried out continuously using movable formwork rather than by spraying concrete, and the spraying generates dust. Solve the working environment problems caused by spraying, and at the same time,
Many proposals have been made to use materials more efficiently by eliminating bounce-back of aggregate.

In order to meet these demands, the present applicant also filed a patent application in 1983 for a concrete casting device using two pressing rollers.
This is proposed in No. 08369 and others.

(C) 0 Problems to be Solved by the Invention However, concrete mortar (herein, "concrete mortar" means "concrete" or " When pouring concrete and mortar, it is necessary to press the pressure roller against the shoring in an appropriate manner to prevent the poured concrete and mortar from leaking outside.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a concrete placing device that can press a pressing roller against a shoring in an appropriate state.

f(1), the means for solving the problem, that is, the present invention has a frame (2), and the seven frames (
2) is provided with a fixing plate (6) provided with concrete/mortar injection means (7), and on both sides of the frame (2) in the lining casting direction such as the direction of arrow E of the fixing plate (6). ,
Pressing rollers (3c, 5c) wound around endless belts (3b, 5b)
3, 5) are supported elastically in the direction of the shoring (12) via a first elastic means (2c), and the rollers (3b, 5) are provided on the pressing rows (3, 5). 5b) in the direction of the shoring (12) - (3e,
5e).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions in the drawings. r (e) below
The same applies to the column ``, action''.

(e) Zero effect With the above-described configuration, the present invention allows the first and second elastic means (2c, 3e, 5e) to press the pressure rollers (3, 5) into close contact with the shoring (12) side. act.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a side view showing an embodiment of a concrete placing device according to the present invention, FIG. 2 is a plan view of the concrete placing device shown in FIG. 1, and FIG. 3 is a diagram showing details of a pressing roller.

As shown in FIG. 1, the concrete placing device 1 has a frame 2, and in the top and bottom of the frame 2 in the figure, that is, in the lining placement direction in the direction of arrow E, anims 2b and 2b are placed in the direction of arrow G.
, is supported movably in the H direction. A coil spring 2C is compressed between each arm 2b and the frame 2, and the arm 2b is always biased in the direction of arrow H by the coil spring 2c. A pressure roller 3.5 is pivotally supported at the tip of each arm 2b via a pin 2a12a.
Each pressing roller 3.5 is supported by a bracket 3a, 3a, 5a, 5a pivoted on the arm 2b about the aforementioned pin 2a.
have. Each bracket 3a, 3a, 5a, 5a can freely rotate in the directions of arrows A and B around the pin 2a.
Bar-shaped springs 3e and 5s are provided between the two springs 3e and 5s to connect them, and the intermediate portions of the springs 3e and 5e are fixed to the arm 2b. Also, each braqueso) 3a, 3
A, 5a15a has a guide plate 3f15f, as shown in FIG.
A guide bar 3g is provided in pairs in the width direction of the guide plates 5c, and between the paired guide plates 3f, 3f, 5f, and 5f.

5g is provided to connect the two. Further, three cylindrical rollers 3b15b are rotatably supported on each bracket 3a, 3a, 5a, 5a and pin 2a, and an auxiliary roller is provided between each roller as shown in FIG. A pressure roller 19 is provided. Auxiliary pressure roller 1
9 is connected to the brackets 3a and 5a via the coil spring 19b.
A pair of cylindrical auxiliary rollers 19d are rotatably supported on the frame 19c.

As shown in FIGS. 1 and 3, endless belts 3c and 5c made of a flexible material such as rubber are wound between each of the three rollers 3b and 5b. , belts 3c, 5c, guide plates 3f, 3f and 5f attached to each bracket 3a, 5a, as shown in FIG.
It is provided between 5f. Further, between each pressing roller 3.5, a fixed plate 6 is provided fixed to the frame 2 by means not shown, and the fixed plate 6 is made of concrete! −・
A mortar injection pipe 7 is fixed through an injection port formed at its tip.

On the other hand, in the tunnel 10 that is being excavated, as shown in FIG.
2 is the excavation direction of the tunnel 10, that is, arrows C and D in FIG.
They are placed at regular intervals in the direction.

Since the concrete pouring device 1 has the above configuration, the concrete pouring device 1 can be used to
When constructing a lining on the ground 11 of Press it with the specified pressure. Then, each pressing roller 3.5 comes into contact with the support 12 via the belts 3c and 5c, and further moves the arm 2b relative to the frame 2 in the direction of arrow G while resisting the elasticity of the coil spring 2C. The shape contacts the shoring 12 with a predetermined pressure. Then, brackets 1 to 3
As shown in FIG.
The rollers 3b and 5b provided at the tips of the brackets 3a and 5a also move in the A direction. Then, the bells l-3c and 5c stretched over the rollers 3b and 5b and the elasticity of the coil spring 2C deform along with the outer shape of the shoring 12, and the pressing roller 3.5 deforms the belt 3c and the elasticity of the coil spring 2C. It comes into close contact with the shoring 12 via 5c. Note that an auxiliary pressure roller 19 is provided between each roller 3b and Sb, and the auxiliary pressure roller 19 is connected to the coil spring 1.
Since the belts 3c and 5c on the shoring 12 side between each roller 3b and 15b are pressed in the H direction by the auxiliary pressing roller 19, the belts 3c and 5c on the shoring 12 side between each roller 3b and 15b are pressed in the H direction by the auxiliary pressing roller 19, and the belts 3c and 5c on the shoring 12 side between each roller 3b and 15b are It is held in close contact with the surface of the shoring 12 without loosening in between.

In this way, when the belts 3c and 5c close the gap between the supports 12.12 installed in the excavation direction of the tunnel 10, the support 12.12, the ground 11 and the concrete placing device 1 are closed, as shown in FIG. , Conc IJ-1- pouring space 15 is formed.

In this state, concrete/mortar 16 is poured from concrete/mortar injection pipe 7 into concrete 1 - pouring space 15.
concrete pouring device 1 and pressing roller 3.
5 on the shoring 12.12.
Concrete is continuously moved from the bottom of the side of the tunnel at the bottom of the figure in the direction of arrow E, that is, toward the top of the tunnel.
Placing mortar 16. The poured concrete mortar 16 is rapidly solidified by the action of the quick setting agent added to the concrete mortar 16, and a lining 17 is continuously formed in the lower part of FIG.

In this way, while moving the concrete placing device 1 in the direction of the arrow E, that is, toward the top of the tunnel 10, the concrete mortar 1 is transferred from the concrete mortar injection pipe 7.
6 into the concrete placement space 15 while lining 17
However, when the concrete 1 and placing device 1 move in the E direction, each belt 3c, 5c of the pressure roller 3.5
The rollers also rotate between the rollers 3b, 3b and 5b, 5b, and move on the shoring 12. At this time, since the belts 3c and 5c are pressed against the support 11 by the auxiliary pressure roller 19, the belt 3c15C rotates between each roller 3b and 5b while remaining in close contact with the support 11 without loosening. go.

Furthermore, when the belt 3c15c rotates with respect to the rollers 3b and 5b, the belts 1-3c and 5c rotate with respect to the rollers 3b and 5b as indicated by the arrow C in FIG. , attempts to move in the D direction in a misaligned manner. However, the pressure roller 3.5 has a guide plate 3f.
, 5f are provided on both sides of the bells 1-3c, 5c to restrict their movement in the direction of the arrow C1D, so the belts 3c, 5c
roller 3 properly without shifting excessively in the C and D directions.
b, 3b, 5b, and 5b. Moreover, each bracket J-3a, 5a rotates in the direction of arrow A in FIG. against arrow G
Even if you move in the direction M and try to ride the guide plates 3f and 5f, the guide plates 3f facing each other in FIG.
, 3f, 5f.

Since guide rods 3g and 5g are installed between 5f,
Excessive movement of the belts 1-3c, 5c in the direction of the arrow G is also restricted, and the driving work can be performed smoothly without the belts 3c, 5c falling off the rollers 3b, 5b.

In addition, the lining 1 is installed on the ground 11 on the opposite side of the tunnel 10.
7, move the concrete placing device 1 in the direction of arrow E in FIG. In this state, with the pressing roller 3 facing down, concrete mortar 16 is poured in the same manner as shown in FIG.

In addition, in the above-mentioned embodiment, two auxiliary pressure rollers 19 are used.
As described above, the case in which the auxiliary rollers 19d are provided on the frame 19C has been described; Of course, such a configuration may also be used.

Further, in the above embodiment, the fixed plate 6 provided between each pressing roller 3.5 was fixedly provided in the direction of the arrow GXH, but the fixed plate 6 does not necessarily need to be provided fixedly. It goes without saying that the pressure roller 3.5 may be supported elastically and movably in the directions of the arrows G and H with respect to the frame 2, similarly to the pressure roller 3.5.

(g) 6 Effects of the Invention As explained above, according to the present invention, the fixing plate has a frame 2, and the frame 2 is provided with a concrete/mortar main input means such as a concrete/mortar injection unit. 6 is provided, and on both sides of the frame 2 in the lining installation direction such as the arrow E direction of the fixed plate 6, endless belts 3c and 5c are wound around pressing rollers via rollers 3b and 5b. 3.5 is elastically supported and movable in the shoring 12 direction via a first elastic means such as a coil spring 2c, and the roller mi e shoring 1 is attached to the pressing roller 3.5.
Since the structure is provided with second elastic means such as springs 3e and 5e that press in two directions, when pouring concrete and mortar, the bells 1-3c and 5c of the pressing roller 3.5 are
The concrete and mortar are pressed against the shoring 12 side by the second elastic means and adhered in a good condition, making it possible to perform the pouring work smoothly without leaking concrete and mortar from the concrete pouring space 15 to the outside. .

Furthermore, if the spring multiplier of the second elastic means is set smaller than the spring multiplier of the first elastic means, the deformation of the second elastic means can be made larger even with the same pressing force in the direction of arrow H. Therefore, first, the belt 3c of the pressure roller 3.5,
5c is deformed by using the deformation of the second elastic means so as to be in close contact with the surface of the shoring 12, and in this state, the entire pressing roller 3 is supported by using the deformation of the first elastic means. It is possible to press against the workpiece 12 side, and it is possible to improve the adhesion between the pressing roller 3.5 and the support work 12 to a better state.
Highly reliable pouring becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a concrete placing device according to the present invention, FIG. 2 is a plan view of the concrete placing device shown in FIG. 1, and FIG. 3 is a diagram showing details of a pressing roller. 1... Concrete pouring device 2... Frame 2c... First elastic means (coil spring) 3.5...
...Press rollers 3b, 5b...Rollers 3c, 5c...Belts 3e, 5e...Second elastic means (spring) 6...
Fixed plate 7... Concrete/mortar injection means (concrete 1... mortar injection pipe) 12 Shoring 16... Concrete/mortar applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 2 others) ) Figure 1 Figure 2

Claims (1)

[Scope of Claims] It has a frame, a fixing plate provided with concrete/mortar injection means is provided on the frame, and an endless shape is formed on both sides of the fixing plate in the lining casting direction of the frame. A pressing roller around which a belt is wound around the roller is supported by a first elastic means so as to be elastically movable in the shoring direction, and the pressing roller presses the roller in the shoring direction. A concrete placing device comprising a second elastic means.