JPH0624911U - Perforated core extrusion holding mechanism - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Do not allow the core to remain in the core drill cylinder after drilling, and if a damaged core remains in the core drill cylinder, actively discharge this residual core. . [Structure] A cylindrical core drill 1, a coaxial non-rotating push rod 30 which penetrates a central portion of a rear end and is slidable in an axial direction, and a mechanical reduction mechanism 1 which pushes out the push rod 30 from a rear portion.
8 and 17 are provided. The slide block 18 of the mechanical reduction mechanism shares the guide 9 with the slide block 8 for boring which supports the core drill.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a perforated core pushing mechanism, and more particularly, to a perforated core pushing and holding mechanism for preventing the perforated core from entering the core drill or preventing the perforated core from remaining in the core drill due to breakage.

[0002]

[Prior art and problems]

 Conventionally, as shown in FIG. 2, when drilling an object to be drilled such as concrete, stone material, asphalt, etc., when a hole having a small diameter is drilled, the core 11 may be easily broken during the drilling. If the broken core 11 remains in the core drill cylinder 2, not only extra rotational energy is required, but also after the drilling is completed, the broken core 11 remaining in the core drill cylinder cannot be discharged for the next work. . Therefore, conventionally, there has been a problem that the broken core 11 must be discharged by hand, for example, by hitting the core drill outer cylinder with a hammer or the like.

This manual work is unexpectedly troublesome work, and rarely, a radial hammer impact force may cause an error in the core drill mounting portion, which may hinder the next drilling work. . In addition, the in-cylinder residual core generated during horizontal drilling cannot be discharged unless the core drill 1 is directed downward, which poses a problem that the work is extremely difficult in a narrow work site. .

As a result of diligent studies to solve these problems, the inventors of the present invention have found that the problem can be solved by disposing a push rod for preventing core intrusion or residue in the core drill cylinder 2. The invention has been reached.

[0005]

[The purpose of the device]

 An object of the present invention is to leave the core on the object to be drilled during or after drilling, or prevent the core from entering or remaining in the core drill cylinder.

Another object of the present invention is to positively discharge the residual core when the core remains in the core drill cylinder due to breakage without pressing down the push rod during perforation.

[0007]

[Constitution of device]

 According to the present invention, a perforated core is provided with a coaxial non-rotating push rod that penetrates a central portion of a rear end of a cylindrical core drill and is slidable in an axial direction, and a mechanical reduction mechanism that pushes the push rod from a rear portion. The perforated core extrusion holding mechanism according to claim 1, wherein the extrusion holding mechanism (Claim 1) and the mechanical reduction mechanism are a core extrusion slide block that shares a guide for a perforation slide block that supports a core drill and a core drill driving unit. Claim 2) is provided.

The present invention will be described in detail below with reference to examples.

[0009]

【Example】

 FIG. 1 is a partial sectional side view of an embodiment of the present invention.

In FIG. 1, 1 is a core drill, 1 A is a core drill gripping part, 2 is a core drill cylinder, 3 is a core drill fitting part, 4 is a cooling water passage, 5 is a bearing with a water seal, 6 is an output shaft spindle, and 6 A Is a rotating channel, 7 is a core drill support arm, 8 is a slide block for drilling, 9 is a guide, 10 is an object to be drilled (concrete), 11 is a core, 12 is a core groove, 16 is a swivel ring, and 17 is a push rod support. An arm, 18 is a core pushing slide block, 25 is a core drill driving motor, 30 is a push rod, 30A is a push rod tip portion, and 35 is a push rod moving motor.

The slide block 8 is lowered to a position where the core drill 1 hits the surface of the object to be drilled 10, and the object to be drilled by the core drill 1 with a diamond tip driven by the core drill driving motor 25 through the speed reduction mechanism in the core drill support arm 7. Perforate.

A push rod 30 is fixed to a push rod support arm 17 by penetrating the core drill 1, the core drill gripping portion 1 A, the core drill fitting portion 3 and the output shaft spindle 6. The push rod does not rotate. The push rod support arm 17 is provided with a push rod moving motor 35, which engages with the guide 9 commonly used in the core pushing slide block 18 and is rotatably loosely fitted into the rotating female screw ring ( Drive (not shown). In this case, a ball screw can be used to reduce the thrust friction resistance. Therefore, the push rod 30 can be moved up and down by operating the switch of the motor 35.

Then, as described above, when the core drill 1 starts drilling, the tip end portion 30 A of the push rod 30 slightly reduces the upper surface of the core 11.

At the time of punching, only the slide block 8 for punching moves down. Therefore, the core 11 is usually left below due to the ascent of the slide block 8 for perforation after perforation. As shown in FIG. 1, the cooling water flows downward through the swivel joint on the upper side and overflows from the core groove 12.

When the push rod 30 is retracted upward for some reason, the core 11 may break due to vibration or the like and remain in the core drill cylinder. In that case, the push rod support arm 17 and the core drill are used. The residual core in the core drill cylinder can be easily discharged by moving either or both of the support arms 7 to move them closer.

[0016]

[Effect of device]

 By carrying out the present invention, all of the above objects can be achieved. That is, the core can be retained and left on the side of the object to be drilled during or after drilling so that it does not remain in the core drill cylinder. Also, when the push rod retracts during drilling, even if the core remains in the core drill cylinder due to breakage, it can be easily discharged.

[Brief description of drawings]

FIG. 1 is a partial sectional side view of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of a conventional example.

[Explanation of symbols]

 1 Core Drill 1A Core Drill Grip 2 Core Drill Cylinder 3 Core Drill Fitting 4 Cooling Water Flow Path 5 Water Seal Bearing 6 Output Shaft Spindle 6A Rotating Water Channel 7 Core Drill Support Arm 8 Drilling Slide Block 9 Guide 10 Drilling Object 11 Core 12 Core Groove 16 Swivel ring 17 Push rod support arm 18 Slide block for core extrusion 25 Core drill driving motor 30 Push rod 30A Push rod tip portion 35 Push rod moving motor

Claims (2)

[Scope of utility model registration request] 1. A perforation characterized by comprising a coaxial non-rotating push rod penetrating a central portion of a rear end of a cylindrical core drill and slidable in an axial direction, and a mechanical reduction mechanism for pushing the push rod from a rear portion. Core extrusion holding mechanism. 2. The perforated core extrusion holding mechanism according to claim 1, wherein the mechanical reduction mechanism is a core extrusion slide block sharing a guide for a perforation slide block that supports the core drill and the core drill driving unit.