JPS6353926B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a concrete product drilling machine for drilling holes in various concrete products.

(b) Prior art and its problems For example, various circular concrete products such as manholes, box culverts, sewage basins, rainwater basins, etc. are sometimes drilled to connect branch pipes, etc. Conventionally, concrete products are formed with core metal fittings attached to desired positions in the molding form, and after demolding, the recesses made by the core metal fittings are punched out, and then branch pipes, etc. are inserted into these holes. It was connected. However, such a construction method was applicable only when the position of drilling holes in a concrete product was determined in advance.

If the hole drilling positions are outside the standard, align the holes at the construction site and mark the positions, then punch out numerous small holes in a row using a concrete drill, etc. After the punching, work such as finishing the small hole traces on the inner surface with a grinder was performed. With this method, it is difficult to obtain dimensional accuracy of the hole drilling position, and
In the past, work efficiency was poor due to the amount of labor and time required.

In view of the above circumstances, a concrete product drilling machine for drilling holes in this type of concrete product has been proposed. That is, the main body of the drilling machine is constructed by providing vertical guide shafts on the left and right sides of a gate-type frame, and a core bit is provided on the guide shafts via a sleeve so as to be able to move up and down. The core bit is hung downward. Therefore, when a cart carrying the products horizontally placed inside the gate type is carried in, the core bit descends from the radially upper part of the concrete pipe and holes are drilled in this state. However, as the outer diameter of the concrete product increases, the height and width of the inside of the gate-shaped hole-drilling machine body are increased accordingly, which limits the installation location. Moreover, there are drawbacks such as the need for indexing from the circumferential direction to determine the drilling angle.

In addition, the main body of the drilling machine is composed of a pair of vertical guide shafts and a core bit installed on the guide shafts via a sleeve so as to be able to move up and down in the vertical direction, and is installed vertically on a turntable. A device has also been proposed that drills holes in concrete products by sending a core bit horizontally. According to this, in order to set the hole drilling position, an elevating mechanism and a feed mechanism on the bit table side are required, and it is also necessary to rotate the turntable to set the hole drilling angle. , which led to an increase in the size and complexity of the device. Furthermore, the concrete product must be lifted up by a crane or the like and placed on the turntable, making it difficult to handle the product without a lifting fitting. In such a configuration, not only is the height of the hole drilling position limited, but also when the hole drilling position corresponds to the upper part of the product, it is necessary to prevent the concrete product from falling during drilling.

In both devices, the core bit side has a sliding structure that allows it to move up and down freely through a sleeve on the guide shaft, so wear of the sliding part causes the core bit to run out, making it difficult to obtain drilling accuracy. It was hot.

(c) Summary of the Invention The present invention has been made in view of the above-mentioned circumstances, and provides a core bit that is fixedly arranged and operated by rotation and feed, and that moves the concrete product horizontally in the vertical direction. By adjusting the position of the concrete product, it is possible to accurately drill holes in the desired position from the lateral direction, thereby providing a concrete product drilling machine that is excellent in terms of dimensional accuracy and processing efficiency.

(d) Embodiments of the invention Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

1 to 3 show an embodiment of the concrete product drilling machine according to the present invention, and in these figures, the concrete product drilling machine, which is designated as a whole by reference numeral 1, is a core bit 2 such as a diamond bit. A hole drilling machine main body 3 equipped with a
and a drilling section 5 provided on the side of the concrete product 4 into which the concrete product 4 is carried.

The hole drilling machine main body 3 is arranged on a main body frame 6, and has a cylindrical bit main body 7 with a core bit 2 removably fixed to its tip, and a bit main body 7 arranged on the upper part of the bit body 7 to rotate the core bit 2. It is equipped with a bit rotating motor 8 for driving, and a bit feeding cylinder 9 for moving the core bit 2, together with the bit body 7, forward and backward toward the hole drilling section 5 side in a horizontal state. A pipe 10 for supplying refrigerant during machining is connected to the rear end of the bit body 7, and the refrigerant passes through the bit body 7 and is supplied from the tip of the core bit 2 to the drilled part of the concrete product 4. It is configured as follows. In the figure, 11 is a hydraulic unit for operating the bit feed cylinder 9;
12 is an operation panel for controlling the operation of each part; 13
is an ejection hole for the refrigerant.

On the other hand, the hole punching section 5 is placed on the base 14,
A trolley 15 on which the concrete product 4 is placed
Rails 16, 16 for carrying in the core bit 2 are laid in a direction perpendicular to the direction in which the core bit 2 moves forward and backward. On one side of the truck 15, a side plate 18 having a drilling angle scale 17 for the concrete product 4 is erected. In the figure, reference numeral 19 indicates a mounting table for the cart 15 on which the concrete product 4 is placed, and 20 indicates a center adjustment device that is arranged at the bottom of the mounting table 19 and moves the concrete product 4 up and down to align its center with the center on the bit side. A cylinder, 21 is a guide frame that reinforces the mounting table 19, 22 is a guide roller fixed to the trolley 15 and engages and guides the guide frame 21 as it moves up and down, 23 is the mounting table 19 and holds the concrete product 4 from its radial direction. A plurality of receiving rollers 24 are placed on this trolley 15 to carry the concrete product 4.
The concrete product 4 is placed on the trolley 15 using each of these members. Furthermore, this trolley 15 is secured to the base 1 by a locking mechanism 26 operated by a trolley fixing handle 25.
It is configured to be fixed at a predetermined location on 4.

In the above configuration, the concrete product 4 is placed on the trolley 15, and its center is marked with the drilling angle scale 17.
The cylinder 20 is operated and aligned, and the fixing band 24 is used to fix the cylinder 20. Next, this cart 15 is carried onto the hole-drilling section 5, and the hole-drilled position in the longitudinal direction of the concrete product 4 is aligned with the bit center and fixed by the lock mechanism 26. It is preferable to bring the core bit 2 close to the concrete product 4 set in this way, stop it once about 5 mm from the concrete product, and then perform the drilling operation by simultaneously supplying the coolant and rotating and feeding the bit. It is. Here, core bit 2
The number of revolutions can be adjusted to match the circumferential speed depending on the diameter of the bit used. When drilling is completed, the supply of cooling water is stopped, the bit is moved back, and when drilling other locations, the band 24 is loosened, the product is rotated, and the product is fixed again at the set position. , it is preferable to perform the operations described above. At this time, if the hole diameters are different, the core bit 2 may be replaced.

The above-mentioned diamond bit has a chip containing diamond particles pressed onto the tip of a cylindrical body, and can be used to carve a hole in the surface of concrete in the same manner as a file. Using such a diamond bit, the wall thickness of the product is 75mm and 250φ.
Experiments have confirmed that the average drilling time is approximately 10 to 15 minutes. In this case, it is preferable to automatically adjust the rotational speed and feed rate of the diamond bit depending on the hardness of the aggregate and concrete used, so that appropriate drilling can be performed. Furthermore, the diamond bit is constructed so that no excessive force is applied to it, thereby extending its life. According to experiments, it was possible to drill approximately 300 holes with a thickness of 75 mm. Furthermore, repairs such as wear and tear can be easily performed.

According to the above-mentioned embodiment, the drilling angle scale 17 makes it possible to accurately and easily position the concrete product 4 in the radial direction. Further, since a plurality of receiving rollers 23 are provided on the carriage 15 in the radial direction, the position of drilling holes in the radial direction can be easily adjusted.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary. For example, trolley 1
5 is shown with a mounting table 19 that can be raised and lowered freely, however, substantially the same effect can be achieved by integrating the mounting table 19 with the trolley 15 and using a lifter or the like on the trolley itself.

(e) Effects of the Invention As explained above, according to the concrete product drilling machine according to the present invention, a core bit such as a diamond bit is fixed and operated simply by rotation and feeding, and it can also be placed horizontally. By simply adjusting the position of the concrete product in the vertical direction, holes can be drilled in the desired position from the lateral direction, resulting in various excellent effects as listed below.

(b) Since the entire structure can be made compact, the installation space is small, and
When used in a factory, line layout can be easily done. In addition, since it can be easily transported by being mounted on a truck, drilling can be performed easily and appropriately at the construction site.

(b) Since the concrete product is placed horizontally on a trolley and holes are drilled, it is possible to drill holes in any desired position with high precision by moving the trolley. This method is particularly effective when the length of the product is long, and it has the advantage that even products without hanging fittings can be easily handled and properly drilled.

(c) The drilling time can be shortened and the holes can be drilled accurately.

[Brief explanation of drawings]

The drawings show an embodiment of the concrete product drilling machine according to the present invention, in which Fig. 1 is a perspective view showing the overall general configuration, Fig. 2 is a front view thereof, and Fig. 3 is a side view thereof. It is. DESCRIPTION OF SYMBOLS 1... Concrete product drilling machine, 2... Core bit, 3... Drilling machine main body, 4... Concrete product, 5... Hole drilling processing section, 6... Main body frame,
7... Bit body, 8... Bit rotation motor, 9
... Bit feed cylinder, 15 ... Cart, 20 ...
...Lifting cylinder.

Claims (1)

[Scope of Claims] 1. A concrete product comprising: a cart on which a concrete product is placed; and a drilling machine having a core bit for drilling holes in the concrete product; In a concrete product drilling machine for drilling holes, the concrete product is placed horizontally on a trolley, and the trolley is provided with a vertical lifting mechanism to fix the main body of the drilling machine in a horizontal state. A concrete product drilling machine characterized by being configured so that core bits are fed in a horizontal direction.