JPH0619674Y2 - Auxiliary roller for tunnel formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an auxiliary roller for a tunnel formwork that transfers a split formwork to a planned site for reuse for reuse.

<Purpose of the Invention> An object of the present invention is to provide an auxiliary roller for a tunnel formwork, which can prevent the split type formwork from falling off and can be transferred smoothly.

<Structure of the Invention> An embodiment of the invention will be described below with reference to the drawings.

(A) General description Fig. 1 shows a longitudinal section of the tunnel.

1 is a tunnel frame constructed by placing concrete, and 2 is a split-type formwork.

A shield machine is located on the left side of the figure to excavate the face.

The shield machine can employ a known excavator such as a type in which the excavation reaction force is obtained from the form 2 or the tunnel frame 1 immediately after being cast or cured.

Reference numeral 3 denotes a form dismantling device which is located at the rear of the shield machine so that it can travel freely.

(B) Formwork (FIG. 4) The split formwork 2 used in this embodiment is, for example, a top formwork 2a for constructing the top of the tunnel, and two upper formwork 2
b, two side molds 2c, and a lower mold 2d for constructing the bottom of the tunnel.

Rails 2e are continuously provided on the inner circumference of each side mold 2c along the axis of the tunnel.

In addition, a plurality of fixed rollers 5 are provided on the inner circumference of each lower mold 2d.
Is provided.

The fixed roller 5 is installed at intervals of the split formwork 2 to be transferred.
According to the total length of a to 2d, the intervals are set so that these molds 2a to 2d do not drop during the transfer.

In the present embodiment, a case will be described in which two sets of fixed rollers 5 are arranged in the axial direction of one lower mold 2d, but more may be provided.

(C) Formwork disassembling device (Fig. 1) The formwork disassembling device 3 includes a traveling mount 6, a tubular moving barrel 7 that moves on the traveling mount 6 in the direction of the tunnel, and an exterior that is rotatably mounted on the moving barrel 7. The revolving structure 8 includes a revolving structure 8, a clamp 9 that extends and contracts from a part of the revolving structure 8, and a retractable reaction force device 10 provided on a front part and a rear part of the moving cylinder 7.

[Running Stand] The running stand 6 has a front frame 12 and a rear frame 13 connected by a plurality of horizontal members 14.

Front wheels 15 are provided at both lower ends of the front frame 12, and are configured to be able to travel on the rails 2e of the side frame 2c.

Further, as shown in FIG. 3, a rear wheel 17 is attached to the bending member 16 that connects the lower portions of the rear frame 13 along the inner peripheral surface of the tunnel.
Is provided and is configured to be able to travel on the inner peripheral surface of the tunnel skeleton 1 after demolding.

A transfer roller 18 is provided on the upper surface of the bending member 16 of the rear frame 13.

The transfer roller 18 is provided at the same level as the fixed roller 5.

A trailing carriage 19 for temporarily placing the formwork 2 is connected to the rear portion of the traveling frame 6.

The traveling carriage 19 includes a large number of roller groups at the same level as the fixed roller 5 and the transfer roller 18.

[Movable Cylinder] The movable cylinder 7 is slidably mounted on the horizontal member 14 forming the traveling frame 6.

On the inner peripheral side of the moving cylinder 7, there are provided rollers that travel by engaging with the upper surface and the side surface of each horizontal member 14, and
The cylinder 2 for sliding is provided between the upper part of the rear frame 13 and the moving cylinder 7.
0 is provided and the movable cylinder 7 slides by the expansion and contraction operation of the sliding cylinder 20.

[Revolving Body] The revolving body 8 is a member that partially includes a clamp 9 having an expansion / contraction function and revolves around the movable cylinder 7.

The turning means of the turning body 8 is a known method.

Therefore, the clamp 9 receives the motions of the movable barrel 7 and the revolving structure 8 to perform the sliding motion and the revolving motion.

(D) Auxiliary Roller As shown in FIG. 1, the distance between the fixed roller 5 at the rearmost part of the lower mold 2d and the transfer roller 18 of the mold dismantling device 3 is relatively large. When 2a to 2d are transferred, the molds 2a to
2d may fall off.

Therefore, in the present invention, in order to prevent the molds 2a to 2d from falling off between the fixed roller 5 and the transfer roller 18 at the rearmost part, a detachable auxiliary roller 21 is attached to the flange at the rearmost part of the lower mold 2d. Provide and deal with it.

That is, as shown in FIG. 2, the auxiliary roller 21 is composed of a substantially triangular support 22 and a roller 23 rotatably provided at one end of the support 22.

A notch 24 is formed in the lower portion of the support 22 for fitting with the flange of the lower mold 2d.

Further, the roller 23 is formed so as to be positioned outside the flange of the lower mold 2d when fitted to the lower mold 2d.

The protrusion length of the roller 23 from the end of the lower mold 2d depends on the distance between the fixed roller 5 and the transfer roller 18 and the mold 2a.
It is appropriately determined in consideration of the length of 2d and the like.

<Operation> Next, a method of transferring the form will be described.

After the concrete curing period, the rear mold 2
Is dismantled for one span and removed.

The work of removing each of the molds 2a to 2d is mechanically performed using the mold disassembling device 3.

The removal order is top mold 2a, upper mold 2b, side mold 2
c, the lower formwork 2d is removed in this order.

Since the separated split form frames 2a to 2d are diverted during assembly, they are temporarily placed on the traveling carriage 19 in the order of removal.

Next, the auxiliary roller 21 is attached to the lowermost lower mold 2d.

Then, since the molds 2a to 2d mounted on the traveling trolley 19 are reused, the lower mold 2d, the side mold 2c, the upper mold 2
b, the top formwork 2a is transferred to the face side in this order.

Since the auxiliary roller 21 is located between the transfer roller 18 and the fixed roller 5 during the transfer of each of the molds 2a to 2d, the mold 2a
It can be transferred smoothly while preventing falling of ~ 2d.

The tunnel frame 1 is extended while repeating the above steps.

When the transfer of the molds 2a to 2d is completed, the auxiliary roller 21 is removed for the next use.

<Effects of the Invention> When each short form is transferred to the face, the auxiliary roller is located between the auxiliary roller on the side of the form dismantling device and the fixed roller on the side of the existing form, so It can be transferred smoothly without falling off.

[Brief description of drawings]

 Fig. 1: Vertical cross-sectional view of tunnel Fig. 2: Explanatory view of attachment state of auxiliary roller Fig. 3: Cross-sectional view of III-III in Fig. 1 Fig. 4: Perspective view of formwork

Front page continuation (72) Nobuyuki Takamatsu 778-5, Taio-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture (72) Hitoshi Nishio 2-3-17 Fujigaoka, Midori-ku, Yokohama-shi, Kanagawa Kenji Maeda Tokyo 1-16-22 Naruse, Machida-shi (72) Inventor Masayuki Akazawa 1-14-17 Minami-naruse, Machida-shi, Tokyo

Claims (1)

[Scope of utility model registration request] 1. A transfer roller located at an end portion of a tunnel formwork having a plurality of rollers on an inner peripheral surface thereof, the support body being detachable from the end of the formwork, and the end of the support body. An auxiliary roller for the tunnel formwork, which consists of a roller that is rotatably mounted on the.