JPH0444076B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a brushing device for cleaning the skin foam on the outer surface of a center used for tunnel lining.

(Conventional technology and its problems) In the secondary lining of tunnel construction using the NATM construction method, there has been a trend in recent years to reduce the thickness of the concrete in the secondary lining, so the surface of the primary lining and the secondary lining have become thinner. Next, the distance between the center and the skin foam, which is the outer surface of the center used for lining, has become narrower. For this reason, cleaning the outer surface of the skin foam, applying a release agent, etc. has become extremely difficult.

If the center skin form is not cleaned sufficiently, the surface finish of the secondary lining concrete will lack smoothness, so there is currently a demand in the tunnel industry for a device that can reliably clean the center skin form. ing.

(Means for Solving the Problem) In order to solve the above-mentioned problem, in the present invention, guides are provided along the skin form on both end surfaces of the inner frame of the skin form at both longitudinal ends of the tunnel lining center. A rail is provided, a roller chain is attached to the guide rail, a frame is provided movably via the guide roller that engages with the guide rail, and a sprocket that meshes with the roller chain is provided on the frame, and the sprocket is connected to the frame. The frame can be driven by rotation, and a brushing frame is provided outside the skin form to connect the frames at both ends of the center. A shaft is provided to be able to swing freely along the shaft, a brush is fixed to this shaft so that the brush is constantly pressed against the skin foam by a spring force, and a brush rotation drive device is provided on the frame to cover the tunnel. This constitutes the skin foam blunting device of the engineering center.

(Function) As described above, in the present invention, since the brushing device is provided which is movable along the outer peripheral surface of the center, the skin foam of the center can be easily and reliably cleaned by mechanical force. I can do it. Therefore, the surface finish of the secondary lining concrete becomes smooth, improving quality and improving work efficiency.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1 in the figure (see Figure 1) is the excavation surface of the tunnel,
2 is the concrete lining for the primary lining, 3 is the center for the secondary lining, and the internal structure is omitted. 4 is a skin form forming the outer surface of the center 3, 5
Primary lining concrete 2 and skin form 4
This is the space for secondary lining between the Further, 6 is a skeleton provided on the inner surface of the skin form 4, and 6a is its both outer end surfaces.

In this embodiment, both outer end surfaces 6a of the frame 6 provided on the back surface of the skin form 4 of the center 3
A large number of brackets 7 made of angle material are distributed and protruded along the skin form 4 at appropriate intervals, and a hollow rectangular cylinder whose cross section is a hollow rectangular shape with a notch cut out is formed into the skin form. Guide rail 8 curved along the arched front shape of 4.
are fixedly provided on each of the brackets 7, and
A roller chain 9 is attached along the bottom of the open side of the guide rail 8, and both ends of the roller chain 9 are fixed to both leg ends of the guide rail 8, respectively.

In addition, on the outside of the skin form 4 of the center 3, a brushing frame 10 having a rectangular plan shape and enclosing two brushes for cleaning the surface of the skin form 4 is placed parallel to the axial direction of the center 3 and around the center. Two plates 11b and 11c are integrally formed with a length slightly longer than the full length of the brushing frame 10, and are connected to the end plates 10a at both longitudinal ends of the brushing frame 10 by bolts 11a at appropriate intervals. An inner frame 12 is provided, which is made up of three plates 12b, 12c, and 12d connected by bolts 12a at appropriate intervals inside the outer frame 11 (see FIGS. 4 and 5). is detachably connected to the outer frame 11 by two bolts and nuts 13.

Two guide rollers 14 that are rotatably fitted into the guide rail 8 are each pivotally supported on the inner edge of the plate 12b of the inner frame 12 via a shaft 15. Also, as shown in FIGS. 4 and 5, the plates 12b and 1 of the inner frame 12
Three sprockets 16, 17, 18 are arranged between 2c so that the center sprocket 17 protrudes upward in FIG.
0, 21 to be rotatably supported on the inner frame 12, and the roller chain 9 is engaged from the lower side of the sprocket 16 through the upper half of the sprocket 17 to the lower side of the sprocket 18 as shown in FIG. will be combined. Gears 22, 23, 24 having the same number of teeth mesh with the shafts 19, 20, 21, respectively.
is fixed, and only the shaft 20 extends between the plates 12c and 12d, as shown in FIG.
A transmission gear 25 is fixed to the extension of the transmission gear 25, and a pinion 26 that meshes with the transmission gear 25 is provided so that the pinion 26 can be driven by a motor 27 fixed to the plate 12d. Furthermore, the second
As shown in the figures and FIG.
Make sure to place it symmetrically to one side.

Further, the fifth part in the brushing frame 10 is
Shafts 28 and 29 passing through the outer frame 11 are installed horizontally at the left and right sides in the figure, and several brackets 30 are installed at the left and right sides of the brushing frame 10 as shown in FIG. The base 31a of the arm 31 is attached to each of these brackets 30 in a symmetrical manner.
(See Figure 6). And this axis 3
2 is positioned on the extended axis of the shafts 28 and 29. Also, the free ends 3 of the left and right arms 31
Two left and right shafts 33 and 34 passing through 1b are rotatably provided, and cylindrical brushes 3 are mounted on these shafts 33 and 34 alternately on the left and right as shown in FIG.
5 is arranged and provided.

In order to rotationally drive the shaft 33 of this brush 35, as shown in FIGS.
A pulley 36 is fixed to the shaft 33 extending to the inside of the shaft 28, a pulley 37 is fixed to the shaft 28, a timing belt 38 is passed around these pulleys 36 and 37, a pulley 39 is fixed to the shaft 28, and the inner frame A pulley 41 (see FIG. 4) is fixed to the output shaft of a motor 40 which is fixed to the plate 12d of No. 12, and a timing belt 42 is passed around these pulleys 39 and 41.

The other shaft 34 is driven by a motor 4 mounted on the left inner frame 12 in FIGS. 2 and 3.
0 are installed in symmetrical positions and driven by means similar to the transmission mechanism described above.

Further, the shafts 28, 2 provided on the outer frame 11
9, as shown in FIGS. 4 and 5, the bases 43a of the two arms 43 are fitted, and the free ends 43b of each arm 43 are fitted to the extensions of the shafts 33, 34, Spring locking rods 44 are provided upwardly projecting from the free ends 43b of the arms 43 fitted to the shafts 33 and 34, respectively, and a coil spring 45 is stretched between these opposing left and right spring locking rods 44. .

Further, as shown in FIGS. 4 to 6, a release agent supply pipe 46 is disposed on the ceiling of the brushing frame 10, and spray nozzles 47 are connected to this pipe 46 at appropriate intervals. Reference numeral 48 (see FIG. 4) is a release agent pressure-feeding hose connected to the pipe 46.

Further, in FIG. 1, 6b is a beam installed horizontally at the top end of the frame 6, and 49 is a cable reel installed on this beam 6b. This reel 4
The cable 50 wound around the frame 6 is connected to a drive device consisting of the motors 27 and 40 via a plurality of guide rollers 51 protruding from the frame 6.
As the brushing device B (see FIG. 1) moves along the guide rail 8, it is pulled out from the reel 49 and reeled in. Further, 52 is a cord electrically connected to the cable 50 of the cable reel 49. This cord 52 is suspended via a locking rod 53 protruding from the beam 6b, and a button switch for remote control is attached to the lower end of the cord. 54 are connected.

Next, the operation of the apparatus of the present invention constructed as described above will be explained. FIG. 1 shows a state in which the brushing device B is located at the lower part on the right side. When the remote control button switch 54 is operated from this state to drive the motors 27 and 40 at both ends of the center 3, the rotation of the motor 40 is caused by the rotation of the pulley 41, belt 42, pulley 39, shaft 28 (or 29), respectively. It is transmitted to the shaft 33 or shaft 34 via the pulley 37, belt 38, and pulley 36. Therefore, the brushes 35 fixed to the shafts 33, 34 rotate in unison, and the shafts 33, 34 are always pressed against the surface of the skin form 4 of the center 3 by the action of the coil spring 45. Therefore, each brush 35 reliably brushes the surface of the skin foam 4.

Further, the rotation of the motor 27 rotates the gear 23 via the pinion 26, the transmission gear 25, and the shaft 20, and also rotates the gear 22, 24 which is meshed with the gear 23.
Rotate. Therefore, each gear 22, 23, 2
Sprockets 16, 17, and 18, which are integral with 4, also rotate. For example, in Fig. 5, sprocket 16,
If 17 and 18 rotate in the direction of the arrow,
Roller chain 9 and sprocket 16, 17, 18
The brushing device B moves in the direction of the arrow A by engaging with the brushing device B. This movement is guided by guide rollers 14 and guide rails 8.

When the brushing device B in FIG. 1 moves upward along the guide rail 8 in this manner, the surface of the skin foam 4 of the center 3 is sequentially brushed from the lower right by each of the brushes 35 described above.

In this case, as shown in FIG.
3 and 34 alternately on the left and right, the skin form 4 can be changed by moving the brushing device B.
The entire surface is brushed. At this time, if necessary, the skin foam 4 can be cleaned more reliably by spraying a release agent from the spray nozzle 47 via the hose 48 and pipe 46.

As the brushing device B moves upward in FIG.
It is wound up at 9. Further, the curvature of the skin form 4 changes as the brushing device B moves, but the shafts 33 and 34 are swingably supported by the arms 31 and 43, and the action of the coil spring 45 allows the brushing 35 is always skin form 4
Since it is in pressure contact with the surface of the skin foam 4, the entire surface of the skin foam 4 can be cleaned regardless of changes in curvature.

When the brushing device B passes the top of the center 3 and descends along the left skin form 4, the cable 50 is pulled out from the reel 49 again, and when the brushing device B reaches the lower end of the left guide rail 8, the limit switch is activated. (not shown) automatically stops. If necessary, the brushing device B can be moved in the opposite direction by operating the remote control button switch 54 again.

According to the apparatus of the present invention, the surface of the skin foam 4 of the center 3 can be efficiently cleaned as described above. Once this cleaning is complete,
The brushing device B may be removed from the center 3 and the secondary lining concrete may be placed in the space 5 between the skin form 4 and the primary lining concrete 2.

(Effects of the Invention) As described above, in the present invention, since a brushing device is provided which is movable by mechanical force along the outer peripheral surface of the center, the skin foam of the center can be cleaned by mechanical force. This can be done quickly, easily and reliably. Therefore, according to the present invention, the surface finish of the secondary lining concrete becomes smooth, the quality is improved, and the working efficiency is also significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a tunnel lining center equipped with the device of the present invention, Fig. 2 is a partial plan view thereof, Fig. 3 is an elevational view of Fig. 2, and Fig. 4 is a partial detailed view of Fig. 3. , FIG. 5 is a cross-sectional view taken from FIG. 4, and FIG. 6 is a cross-sectional view taken from FIG. 4. 3... Centaur, 4... Skin form, 6...
...Frame, 6a... End face, 8... Guide rail, 9
...Roller chain, 10...Brushing frame, 11...Outer frame, 12...Inner frame, 14...Guide roller, 16, 17, 18
... Sprocket, 22, 23, 24 ... Gear,
25... Transmission gear, 26... Pinion, 27...
Motor, 28, 29... shaft, 30... bracket, 31... arm, 32... shaft, 33, 34...
...Shaft, 35...Brush, 36, 37...Pulley,
38...Timing belt, 39...Pulley, 4
0... Motor, 41... Pulley, 42... Timing belt, 43... Arm, 44... Spring locking rod, 45... Coil spring.

Claims (1)

[Claims] 1 Both end surfaces 6 of the inner frame 6 of the skin form 4 at both longitudinal ends of the tunnel lining center 3
A guide rail 8 is provided along the skin form 4, and a roller chain 9 is attached to the guide rail 8.
sprockets 16, 17, 1 which are movably provided and mesh with the roller chain 9;
8 is provided on the frames 11, 12, and the frames 11, 12 can be driven by rotating the sprockets 16, 17, 18,
The frame 1 at both ends of the center 3
Brushing frame 1 connecting between 1 and 12
0 located outside the skin form 4,
Shafts 33 and 34 are provided in this brushing frame 10 so as to be able to swing freely along the longitudinal direction of this frame 10, and a brush 35 is fixed to these shafts 33 and 34, and this brush 35 is attached to the skin by a spring force. A skin foam brushing device for a tunnel lining center, characterized in that the skin foam brushing device is always in pressure contact with the foam 4, and a brush rotation drive device is provided on the frames 11 and 12.