JPS6123115Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shotcrete attachment that is attached to a hydraulic power shovel and sprays mortar onto an excavated surface during tunnel construction.

During tunnel construction, a system in which a mixture of cement, fine aggregate, and water is sprayed with compressed air is used to prevent soil and rock from collapsing on the excavation surface after the shaft has been excavated and until it is permanently lined. The Yotsutocrete construction method has been widely used in recent years, and various devices have been devised to reduce the labor of workers in this construction method and to ensure safe and highly efficient construction.

That is, as in the example shown in FIG.
A shotcrete machine, in which the hydraulic operating device 2 with which the hydraulic operating device 2 is attached is fixedly installed on the rock drill mount 4 of the crawler drill 3, or the spray nozzle 1 as shown in the example shown in FIG.
A shotcrete machine, etc., in which a hydraulic operating device 2' equipped with a hydraulic operating device 2' is fixed on a platform 7 supported by a jib 6 mounted on the loading platform of a general transportation vehicle 5, has been put into practical use. It was labor-saving, safer, and more efficient than the previous hand-held construction method, and contributed to the advancement of tunnel construction technology. However, as the scale of tunnel construction became even larger, the following problems arose.

In other words, as tunnel excavation cross-sections have become larger and ceilings have become higher, shotcrete machines have had to have longer arms to support the nozzle, a wider working range, and light and quick operation. It has been strongly requested.

On the other hand, the work area near the face of tunnel construction is narrow, making it difficult to operate various types of heavy machinery at the same time, making it difficult to provide sufficient waiting areas, and making it difficult to move and replace equipment to rear bases. do not have. For this reason, increasing the size of a special-purpose shotcrete machine more than ever is subject to strong restrictions from the viewpoint of heavy machinery operation and management.

This idea was made in view of the circumstances mentioned above,
Easy construction in high places such as large cross-section tunnels,
To provide a shot cleat attachment that can be easily replaced with other work attachments and does not occupy a large space during standby.

Next, the structure of the present invention will be explained based on FIG. 3 showing an embodiment of the present invention. The rotating device 8 is the spray nozzle 1
The rotating device 9 supports the rotation device and rotates it in the directions of arrows A and B, the forward and backward movement device 9 supports the rotation device and moves it back and forth in the directions of arrows C and D, and the swing device 10 supports the forward and backward movement device. This device can be rotated in the directions of arrows E and F, and each device for rotation, forward/backward movement, and turning is of a well-known structure, and the above three devices are combined to perform hydraulic operation. Device 2
It consists of A mounting bracket 11, which will be described in detail later, is fixed to the back of the swing device 10 so that it can be easily replaced with a bucket, which is a working device for a hydraulic power shovel.

As shown in FIG. 4, in the bucket belt device of a hydraulic power shovel, generally, the tip of an arm 12 engages with a bracket 15 fixed to a bucket 14, and a fulcrum pin hole 16 bored in the bracket is inserted into the tip of the arm. By inserting the fulcrum pin 17 so as to be aligned with the fulcrum pin hole 13 formed in the fulcrum pin hole 13 formed in the fulcrum pin hole 13 formed in the fulcrum pin hole 13, the bucket can be pivotably supported relative to the arm, and the lever 19 can be tilted by the bucket cylinder 18. A drive pin hole 21 provided at the tip of a drive rod 20 engaged with the bracket 15 is aligned with the same axis as a drive pin hole 22 formed in the bracket 15, and a drive pin 23 is inserted and engaged therein. . With this structure, the bucket can be tilted around the fulcrum pin 17 or held in a fixed position using hydraulic pressure. ) was created so that it could be easily replaced.

The bracket 11 (Fig. 3) fixed to the hydraulic operating device has fulcrum pin holes 16' and 16 having the same diameter as the fulcrum pin hole 16 of the bracket 15 (Fig. 4) fixed to the bucket. Two drive pin holes 22', 22' having the same diameter as the drive pin hole 22 of the bracket 15 fixed to the bucket are also provided. Then, the distance between the fulcrum pin hole 16 of the bucket bracket 15 and the drive pin hole 22 is determined.
L ₁ , two fulcrum pin holes 16', 16' of the bracket of the hydraulic operating device and two drive pin holes 2.
As shown in Fig. 3, the distance between any two of the four pin holes (2', 22') is L ₂ ,
L ₃ , L ₄ , and L ₅ are defined, and the size relationship of each of these spacing dimensions is made such that L ₁ ≈L ₂ <L ₃ <L ₄ <L ₅ .

Since the present invention is constructed as described above, the bucket belt 14 attached to the hydraulic power shovel can be quickly and easily replaced with the hydraulic operating device 2 supporting the spray nozzle by the following procedure.

Release the lock by the stopper 24 and remove the fulcrum pin 17.
Remove. The drive pin 23 is also removed in the same way.

The tip of the arm 12 is separated from the bracket 15 of the bucket and engaged with the bracket 11 of the hydraulic operating device.

An arbitrary pin hole among the two fulcrum pin holes 16', 16' is aligned with the arm pin hole 13, and the fulcrum pin 17 is penetrated, and a retainer 24 is applied. Similarly, align the drive pin hole 21 with any one of the drive pin holes 22' and 22', and pass the drive pin 23 through it.
Apply the stopper 25.

When the hydraulic operating device 2 supporting the spray nozzle is installed on the hydraulic power shovel in this way,
By expanding and contracting the bucket cylinder 18, the hydraulic operating device 2 can be tilted up and down in the directions of arrows G and H about the fulcrum pin 17. At this time, the fulcrum pin holes 16' and 16', two each drilled in the bracket 11, and the drive pin hole 2
The distance between the fulcrum pin 17 and the drive pin 23 is L ₂ depending on which one of the pins 2' and 22' is selected.
It can be changed in 4 steps from the dimension to the _L5 dimension.

If this pin spacing is set to a dimension _L2 that is approximately equal to the pin spacing _L1 in the bucket device, the hydraulic operating device 2
tilts up and down by an angle approximately equal to the bucket tilting angle of a hydraulic power shovel. Also, if the pin spacing is increased sequentially like L ₃ , L ₄ , L ₅ ,
Accordingly, the vertical tilting angle of the hydraulic operating device 2 becomes smaller, and the fine operability of the vertical tilting becomes better instead.

The required vertical tilting angle of the spray nozzle support in the shotcrete construction method is generally much smaller than the bucket tilting angle of a hydraulic power shovel (approximately 130 degrees); High precision in tilting operation is also required, and the degree of precision varies depending on the working conditions. Therefore, when the present invention is applied, the fulcrum pin 17 and the drive pin should be selected so as to select a pin spacing suitable for the working conditions, and if the working conditions change during operation, the pin spacing should be adjusted accordingly. By performing 23 attachment/detachment operations, shotcrete work can be performed quickly and easily with the optimal tilting characteristics.

FIG. 5 shows another embodiment. Hydraulic operating device 2
One fulcrum pin hole 16' and two driving pin holes 22', 22' are drilled in the bracket 26 fixedly installed in the bracket 26, and in addition, two level pin holes 27, 27 are bored. is provided. This embodiment is designed to be used as a replacement for the bucket belt 28 of a hydraulic power shovel equipped with a leveling device shown in FIG.

The leveling device includes a bucket cylinder 1 that tilts the bucket 28 around a fulcrum pin 17'.
In addition to 8', a level cylinder 29 is provided, and the tip of the piston rod of the cylinder is connected to a bracket 32 fixed to the bucket 28 through a link 30 and a level pin hole 31. The level cylinder 29 includes a hydraulic circuit for the bucket cylinder 18', a hydraulic circuit for the arm cylinder 34 that operates the arm 33, a hydraulic circuit for the boom cylinder (not shown) that operates the boom 35, and an electromagnetic control device (not shown). (not shown),
This level cylinder 29 and bucket cylinder 1
8' and the arm 33 and boom 3 while being mutually balanced.
5, even if the angle θ that the arm 33 makes with respect to the horizontal plane changes, the bucket bag 28 is kept at a substantially constant inclination angle with respect to the ground. In this hydraulic power shovel with a leveling device (Fig. 6), by removing and attaching the fulcrum pin 17', drive pin 23', and leveling pin 31, the bucket belt 28 and the book shown in After the replacement, the hydraulic operation device 2 supporting the spray nozzle 1 is tilted up and down by the expansion and contraction operation of the bucket cylinder 18', and the two drive units can be quickly and easily replaced with the device according to the invention. Pin hole 22'
As in the previous example (FIG. 3), the tiltable angle range and fine operability can be adjusted by selecting one of the above.

In this case, the level cylinder 29 expands and contracts in conjunction with the expansion and contraction of the bucket cylinder 18' so as not to interfere with the operation of the bucket cylinder 18'.

When this invention is applied, due to the effects detailed above,
The bucket belt of a hydraulic power shovel and the shot cleat attachment can be quickly, easily, and safely replaced, so the bucket can be used to support a hydraulic power shovel with a wider range of work than previous shot crete machines. By using the mechanism as is, spraying work in high places such as large-section tunnel construction can be carried out easily and with high efficiency. Furthermore, the shotcrete attachment part (the part shown in Figure 3 or Figure 5), which is removed during bucketing work, is much smaller and lighter than previous spray-only machines; Since the weight and volume of the bucket part that is removed is only a small part of the entire hydraulic power shovel, it does not require a large space for standby storage and is easy to transport. For this reason, operation and management of construction machines in a narrow tunnel work face workshop is significantly facilitated. Furthermore, by arbitrarily selecting the distance between the fulcrum pin and the drive pin, shotcrete construction can be performed with tilting characteristics that are optimal for the working conditions, resulting in many practical effects such as improved work efficiency and construction accuracy. .

[Brief explanation of the drawing]

Figures 1 and 2 are external views showing a shotcrete machine commonly used in the past, Figure 3 is a perspective view of an embodiment of the present invention, and Figure 4 is an exploded view of a bucket cleat device for a hydraulic power shovel. FIG. 5 is a front view of another embodiment, and FIG. 6 is an external view of a bucket operating mechanism of a hydraulic power shovel equipped with a leveling device. 1... Spray nozzle, 2... Hydraulic operating device, 1
1, 26... Bracket, 13, 16, 16'...
...Fulcrum pin hole, 17...Fulcrum pin, 21, 22...
...Driving pin hole, 23...Driving pin, 27...Level pin hole, 31...Level pin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hydraulic operating device 2 that supports the shot cleat spray nozzle 1 and causes it to rotate, move forward and backward, etc. is engaged with the tip of the arm 12 of the power shovel. A bucket belt 11 is fixedly installed, and a fulcrum pin hole 16' to be engaged with the bracket fulcrum pin 17 of the power shovel and a drive pin hole 22' to be engaged with the bucket drive pin 23 are bored in this bracket. Fulcrum pin hole 1
At least two or more holes are drilled in both or either of the pin holes 16' and the driving pin 22', and the distance between the two pins is determined by a combination of any two of the pin holes 16' and 22'. A shot cleat attachment for hydraulic power shovels that is adjustable in stages. (2) A bracket 2 having the fulcrum pin hole 16' and at least two drive pin holes 22'.
6, the hydraulic type according to claim 1 of the utility model registration claim, characterized in that at least two or more leveling pin holes 27 to be engaged with the leveling pin 31 of the hydraulic power shovel with a leveling device are bored. Shot cleat attachment for power shovels.