JPH02197457A - Running truck for tunnel work - Google Patents

Abstract

PURPOSE:To form a truck suited for work of a tunnel of circular section concentrating damage in a bottom part by arranging front and rear right and left drive wheels horizontally in the upper part of a body frame while many right and left running wheels tilting in a truncated chevron-shape in the lower part of the frame. CONSTITUTION:A running truck 2 constitutes its principal part by extending four leg members 4 from the lower surface of a body frame 3 while mounting a wheel holding frame 5 to link over the front and rear leg members 4. Two or more running wheels 6 are supported to the wheel holding frame 5 respectively through each rotary shaft 7. Here the wheel holding frame 5 is mounted diagonally facing the outer for the leg member 4, thus arranging each running wheel 6 in a truncated chevron-shape brought into contact at a right angle with the internal wall surface of a tunnel T. While four drive wheels 9 are respectively arrange in four corners of the body frame 3 and horizontally supported respectively to a wheel holder 10 through a rotary shaft 11. In this way, the truck is suited for work of the tunnel or the like of circular section concentrating damage to the bottom part.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a traveling trolley for tunnel work, and particularly to a traveling trolley for tunnel work suitable for use in inspecting and repairing tunnels with a circular cross section, such as water conveyance tunnels. It is something.

[Conventional technology]

There are various ways to repair damaged parts of the tunnel inner wall surface, such as repairing with mortar and installing new lining plates, but in either case, various repair materials or equipment necessary for these repairs are required. must be carried into the tunnel. Transporting and inspecting these equipment is usually carried out using trolleys.

Such a bogie is one that is configured to run on the bottom of a tunnel as the running roadbed, or one that is configured to be able to move along a track such as a rail laid at the bottom of the tunnel. , etc. are common.

[Problem to be solved by the invention]

By the way, the water tunnels that make up hydroelectric power generation facilities, etc.
In terms of structure, they generally have a circular (oval) cross section and are made of concrete. For example, in such a water conveyance tunnel, sand, gravel, etc. mixed into the water scrape off the tunnel lining (concrete) over a long period of time, causing erosion of the tunnel inner wall surface. In that case, the damage described above will naturally occur at the bottom of the tunnel inner wall, which is most susceptible to the effects of water flow, especially around one quarter of the diameter.
The focus will be on the part that falls within the range of (commonly known as the "invert part"). For this reason, there has been a problem in that it is difficult to use general work carts in tunnels such as the water conveyance tunnel.

In other words, if an ordinary bogie is used when the invert part of the tunnel is damaged as described above, the bogie must run on the bottom of the inner wall of the tunnel that needs to be repaired, making it extremely difficult to move the bogie. Become. On the other hand, if a track is provided, running will be improved, but the track will be attached to the repaired part, which is extremely unreasonable in terms of work.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a traveling trolley for tunnel work that can be extremely well applied to tunnels having a circular cross section, such as water conveyance tunnels, where damage is particularly concentrated at the bottom. purpose.

[Means to solve the problem]

A traveling trolley for tunnel work according to the present invention includes a main frame constituting the main body of the traveling trolley, and a plurality of wheels that come into contact with an inner wall surface of the tunnel and support the main frame so that the main frame can run, and These wheels are arranged in a pair on the left and right, and the first wheel mainly supports the weight of the main body frame.
and a second wheel group that abuts against both sides of the inner wall of the tunnel to restrict movement of the main frame in the width direction and drive the main frame in the longitudinal direction of the tunnel, and is a pair of left and right wheels. The first wheel group is
It is characterized in that the left and right wheel groups are mutually provided in a V-shape so that they are in contact with the tunnel inner wall surface at approximately right angles.

[Effect]

Since it includes a first wheel group that bears its own weight and a second wheel group that restricts movement in the width direction, it exhibits good running performance in tunnels with a circular cross section.

At this time, by arranging the first wheel group so that the left and right wheels form a 7S-shape, it is possible to avoid running on the tunnel bottom where the damage is most severe.

In addition, since the second wheel group is used as the driving wheel, the reaction force can be applied to the side wall portion which is less damaged, so that the driving force can be transmitted smoothly and stable running can be expected.

〔Example〕

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

FIGS. 1 to 3 show a traveling vehicle for tunnel work (hereinafter simply referred to as "traveling vehicle") according to the present invention, which is an example in which the present invention is applied to a water tunnel having a circular cross section. In the figure, symbol T is a tunnel, and l is a damaged portion that occurs at the bottom (in/ead portion) of the tunnel T.

As shown in FIGS. 1 and 2, the traveling vehicle 2 is configured to include a main body frame 3 that constitutes the main body of the traveling vehicle. In this case, the main frame 3 is composed of two steel members 3 m and 3 installed parallel to each other along the longitudinal direction of the tunnel T.
a, and steel members 3b and 3b, which are provided perpendicularly to the two steel members 3a and connect the two steel members 3a, forming a rectangular structure as a whole.

From the lower surface of the main frame 3 are four leg members 4.4.
... is extended downward. At the lower ends of these leg members 4, a wheel holding frame 5.5 having a U-shaped cross section is provided so as to span the front and rear leg members 4, 4, respectively. In this case, the wheel holding frame 5.5 is longer than the main frame 3, and both ends thereof are connected to the main frame 3.
It is more protruding from the front and rear. The wheel holding frame 5.5 has a plurality of running wheels 6, 6. ... (first wheel group) are respectively connected to the rotating shafts 7.7. It is provided through...

Here, as shown in FIG. 5, the wheel holding frame 5 is provided diagonally outward with respect to the leg member 4 extending in the vertical direction, so that each of the running wheels 6 is It is designed to be grounded at right angles to the inner wall surface of the tunnel T. In other words, as shown in FIG. 1, a pair of left and right running wheels 6 are arranged so as to form a V-shape with each other. Therefore, in addition to a radial bearing (not shown), a thrust bearing 8 is provided between the running wheels 6 and the running wheel holding frame 5 to cope with the load acting in the width direction of the running wheels 6. (See Figure 5).

On the other hand, four drive wheels 9 (second wheel group) are provided at each of the four corners of the rectangular main frame 3.

These driving wheels 9 each have a wheel holder 1 having a U-shaped cross section.
0, horizontally via the rotating shaft 11. Moreover, these four drive wheels 9 are set so as to contact exactly the center portion of the side wall of the inner wall surface of the tunnel T.

Furthermore, although not shown in FIGS. 1 to 3, in this embodiment, the wheel holder 10 is provided with a suppression mechanism 13 mainly composed of a spring 12, as shown in FIG.

One end of the suppression mechanism 13 is fixed to the main frame 3. In other words, the drive wheel 9 is constantly pressed against the inner wall surface of the tunnel T by the action of the suppression mechanism 13 with the necessary pressure.

The drive wheel 9 is driven by a drive mechanism as shown in FIG. 4, for example. In the figure, reference numeral 15 is an electric motor, 16 is a storage battery for driving the electric motor 15, and 17 is an electric motor 15.
The differential gear device 18.18 is the output side of the differential gear device 17, and the transmission shaft extends horizontally in the width direction of the tunnel T; 19°19 is a bevel gear; A drive shaft provided integrally with the large gear 19a, 2
1, 21, . . . are sprockets provided coaxially with the drive shaft 9, and 22 is a chain connecting the drive shaft 20 and the sprocket 21. Although not shown in the drawings, these drive mechanisms are attached to the main frame 3.

Next, the operation of the traveling trolley 2 having the above configuration will be explained.

The traveling trolley 2 is carried in, for example, through a working tunnel formed substantially perpendicular to the tunnel T to be repaired.

Needless to say, the traveling cart 2 is installed so that the traveling wheels 6 are located at the bottom side of the tunnel T. As a result, the traveling truck 2 is supported by the plurality of traveling wheels 6, 6°, . . . (first wheel group); ... is provided so that the running wheels 6 on both sides form a /'' shape with each other as described above, so these running wheels 6゜6, ... are located at the damaged part l of the tunnel T. It is rarely mentioned in the book.

On the other hand, drive wheels 9.9. In this case, the widthwise interval of the (second wheel group) is equal to or larger than the diameter of the tunnel T in the unrestrained state, but when a force inward in the widthwise direction is applied, the spring 12 can be moved inward relatively easily.

After being installed in the above state, this traveling bogie 2 is moved to the tunnel T.
In order to move the vehicle within the vehicle, the electric motor 15 that constitutes the drive mechanism of the traveling vehicle 2 may be activated.

When the transmission shaft 18 rotates through the differential gear device 17 due to the operation of the electric motor 15, the bevel gear 19, 'A'1J
A sprocket 21 provided on each drive wheel 9 is driven via a jJ axis 20 and a chain 22, thereby driving the four drive wheels 9. These driving wheels are pressed against the inner wall surface of the tunnel T with the necessary pressure by the pressing mechanism 13, so that a sufficient reaction force (frictional force) can be obtained between them and the inner wall surface of the tunnel T, thereby preventing damage. Since it comes into contact with the side wall portion where there is little friction, the driving force can be transmitted smoothly and stable running can be achieved. Furthermore, the running wheels 6, 6, which support most of the load of this running trolley 2. . . . can also move (travel) extremely smoothly because it is less likely to hit the damaged parts l with rough surfaces as described above. Furthermore, even if the damage is severe and the damaged part l extends over a wide area, so that the damaged part l partially covers the running wheel 6,
If the running wheels 6 are of a multiple type in this way, it becomes possible to easily pass over the vehicle.

FIG. 6 shows another configuration example of the present invention, in which the supporting form of the running wheels 6 is changed.

A plurality of running wheels 6, 6 arranged on the left and right sides of the main frame 3, respectively. In this case, two pieces are held as a set by independent wheel holding frames 5'5', . In the illustrated example, there are 12 running wheels 6 (
Since the configuration has 6 pieces on one side, these 1
Two running wheels 6 are held by six wheel holding frames 5'. These 6 wheel holding frames 5
' is connected to the lower ends of six leg members 4 hanging down from the main frame 3 with a pin 23 as an axis. The other configurations are the same as those of the first embodiment.

When the support structure for the running wheels 6 is configured as described above, 2
Since each running wheel 6 can rotate around the pin 23, even if there are irregularities on the surface (tunnel inner wall surface) through which these running wheels 6, 6,... You can follow it and drive more smoothly. Therefore, the area where the damaged part l occurs is extremely wide,
This is extremely effective in cases where the running wheels 6 reach the parts where they travel.

Note that the running wheels 6, 6, which receive most of the load. It is also possible to interpose a buffer mechanism composed of, for example, a spring and a damper on the support leg 4 of the (first wheel group), and when configured in this way, even better running is achieved. I can hope for it. In addition, in the embodiment, an example in which the present traveling bogie 2 is applied to a water tunnel is shown, but other circular (
Thermal theory can also be applied to tunnels with an oval (oval) cross section.

〔Effect of the invention〕

As explained above, the traveling trolley for tunnel work according to the present invention has a configuration including the first wheel group that bears its own weight and the second wheel group for moving in the longitudinal direction of the tunnel. In addition to exhibiting good running performance, the first pair of left and right wheels are arranged in a V-shape, making it possible to avoid moving over the tunnel bottom, which is the most prone to damage, as much as possible, making it extremely smooth. By using the side wall portion, which can move freely and has little damage, as the driving reaction force portion, stable transmission of driving force becomes possible, and the vehicle can run extremely smoothly.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention,
Figure 1 is a front view of the traveling bogie along with the tunnel, Figure 2 is a plan view of the same, and Figure 3 is similar to Figure 1! -! Arrow view, 4th
The figure is a plan view showing an example of the drive mechanism, FIG. 5 is a partial front view showing the circumference of the running wheel enlarged and shown partially in section, and FIG. 6 is another example of the configuration of the present invention, showing a part of the circumference of the running wheel. FIG. 3 is a plan view including a cross section. T...Tunnel, l...
... Damaged part, 2... Traveling trolley for tunnel work,
3... Main frame, 6... Running wheels (first wheel group component), 9...
... Drive wheel (second wheel group component). Applicant Ishikawajima Kenzai Kogyo Co., Ltd.

Claims (1)

[Claims] It is equipped with a main frame constituting the main body of the traveling bogie, and a plurality of wheels that contact the inner wall surface of the tunnel and support the main frame so that the main frame can run, and these wheels are arranged in pairs on the left and right and mainly a first wheel group that supports the weight of the main frame; and a second wheel group that comes into contact with both side surfaces of the inner wall of the tunnel to restrain movement of the main frame in the width direction and drive the main frame in the longitudinal direction of the tunnel. , and the first pair of left and right
A traveling trolley for tunnel work, characterized in that the wheel groups are mutually provided in a V-shape so as to be in contact with the inner wall surface of the tunnel at approximately right angles.