JPH0617912Y2 - Slit forming device for bedrock - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a bedrock slit forming device for forming a slit for efficiently crushing bedrock or concrete.

[Conventional technology]

When excavating a conventional tunnel or destroying an existing concrete structure, a slit may be formed in the rock bed or the like in advance so that excavation or destruction can be performed efficiently.

Also, a slit forming device that forms a slit in rock etc.
For example, Japanese Patent Application No. 61-49646 and Japanese Patent Application No. 61-313408 have already been applied.

[Problems to be solved by the device]

However, in the above-described conventional slit forming device, when changing the contact surface of the drill bit to the rock surface, the main body must be rocked by the rocking mechanism, which makes the rocking mechanism complicated and expensive. was there.

The present invention has been made for the purpose of improving the above-mentioned problems, and an object thereof is to provide a slit forming device for a rock mass, which is capable of forming a slit in the rock mass without requiring a rocking mechanism.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a guide frame movable along a guide rail laid in the direction of forming a slit, and a feed table on the guide frame that is movable in the rock direction by a feed mechanism. By providing a striking plate on this feed table, which has a line bit at the tip end and is striking by a striking device provided at the base end side, it is possible to simply move the main body along the bedrock It is designed to form a slit with a predetermined depth on the surface. By mounting the main body on a gantry type frame, a long semicircular slit for a large section can be excavated with one setting A slit forming device is provided.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 is the main body of this apparatus, in which a guide frame 5 of a feed mechanism 4 is provided on a lateral movement guide rail 3 on a lateral movement guide rail 3 laid so as to be substantially parallel to the surface of the bedrock 2 on which a slit is to be formed. It is mounted so as to be movable along it.

The feed mechanism 4 has a feed table 7 which is reciprocally movable along the guide frame 5 toward the bedrock 2 by a feed cylinder 6, and a striking device 8 and a striking plate 9 are provided on the feed table 7. .

The striking device 8 is connected to the base end side of the striking plate 9 via an anvil 11 supported on the feed table 7 by an anvil holder 10 so that the striking plate 9 is impacted.

The striking plate 9 is supported on the feed table 7 by a plate holder 12, and a line bit 13 is detachably attached by a pin 14 to the tip side.

The line bit 13 has a structure which projects the pits 13 _b in a plurality of rows along the front tapered surface 13 _c of the bit holder 13 _a moving direction (arrow A) of the main body 1 becomes narrow.

Note the shape of the line bit 13, as shown in FIG. 3 (b), the bit 13 _b arranged in these tapered surfaces 13 _c is provided a tapered surface 13 _c of the two surfaces with different inclination directions to the bit holder 13 _a and may also FIG. 3 as shown in (b), the bit holder 13 _a bit 13 with the front in a circular arc shape in the circular arc surface 13 _d of the _b
May be arranged.

On the other hand, reference numeral 15 in the figure is a motor for lateral movement of the main body 1, which is attached to the rear end of the guide rail 5 of the feed mechanism 4 and has a rotary shaft.
15 pinion 16 provided on _a lateral movement guide rail 3
The main body 1 can be moved in the direction of arrow A along the guide rail 3 by the rotation of the lateral movement motor 15 by being engaged with a rack 17 installed along the guide rail 3.

Next, the operation will be described. In forming the slits 2 _{a in the} bedrock 2, first, the feed table 7 is advanced by the feed cylinder 6 and the line bit 13 at the tip of the impact plate 9 impacted by the impact device 8. Is pressed against the bedrock 2, and while the bedrock 2 is being excavated by the line bit 13, the transverse feed motor 15 moves the main body 1 along the guide rail 3 along the arrow A.
_4A , a slit 2 _a as shown in FIG. _4A is excavated along the moving direction of the main body 1.

When the slit _2a of the planned length is excavated, the main body 1 is returned to the original position, the above operation is repeated again, and the excavation is performed until the depth of the slit _2a reaches a predetermined depth. The slit 2 _a having a deep depth as shown in (b) can be obtained.

Note the taper front of the bit holder 13 _a in the above embodiment, an array of bit 13 _b on the tapered surface 13 _c, the front of the bit holder 13 _a as a plane, bit 13 _b in the plane
A similar effect can be obtained even if the main body 1 is inclined by an angle θ with respect to a line B perpendicular to the moving direction A as shown in FIG.

When the slit _{2a is} to be excavated along the planned line of the tunnel, the main body 1 is mounted on the gantry type frame 20 as shown in FIGS. By excavating the bedrock 2 while moving the main body 1, the slit _2a along the planned line of the tunnel as shown in FIG. 8 can be easily obtained.

[Effect of device]

As described in detail above, the present invention forms the slits in the rock mass while moving the entire slit forming device main body along the rock mass surface. Compared to excavating slits by changing the position, the structure is simple, so it can be provided at low cost, and the slit of any length can be easily excavated by setting the main body once on the rock surface. . Also, by moving the main body using a gantry type moving device, it is possible to excavate a slit for a large cross section with a single setting, so excavation efficiency is good and it is economical.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a side view, and FIGS. 3 (a) and 3 (b) are explanatory views showing another embodiment of the line bit, and FIG. FIGS. 9 (a) and 9 (b) are explanatory views of the operation, and FIGS. 5 to 8 are explanatory views showing another embodiment. 1 ... Slit forming device main body, 2 ... rock, _2a ... slit, 3 ... guide rail, 4 ... feed mechanism, 5 ... guide frame, 7 ... feed table, 8 ... striking device, 9 ...... Strike plate, 13 ...... line bit, 13 _a ...... bit holder, 13 _b ...... bit, 13 _c ...... tapered surface, 13 _d ...... circular arc surface, 20 ...... frame.

Claims (4)

[Scope of utility model registration request] 1. A guide frame 5 is provided which is movable along a guide rail 3 laid in a direction to form a slit 2a, and a feed table 7 is provided on the guide frame 5 by a feed mechanism 4 so as to be movable back and forth in the rock direction. The feed table 7 has a line bit 13 at its tip,
And a rock formation slit forming device provided with a striking plate 9 which is striked by a striking device 8 provided on the base end side. Wherein the bit holder 13 _a front of the line bit 13 is provided a tapered surface 13 _c or Enkomen 13 _d, these tapered surfaces
The rock slit forming apparatus according to claim 1, wherein 13 _c or an arc surface 13 _d is provided. 3. The bedrock slit forming apparatus according to claim 1, wherein the slit forming apparatus main body 1 is inclined at an angle θ with respect to a direction perpendicular to the moving direction A. 4. A gantry type frame for the main body 1.
Attached to 20, by moving the main body 1 along the frame 20, so as to form a slit 2 _a bedrock 2, rock slit forming apparatus according to claim 1.