JPH0593772U - Hammer drill equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a hammer drill that can be used with confidence even if it is used for a long time or even if leaked gas or the like exists in the surroundings. At the same time, such a hammer drill greatly improves workability. [Composition] An air intake of a hammer drill and a blower are connected via a blower pipe, and the blower pipe is provided with a safety device for stopping the operation when the blow pressure to the hammer drill is below a predetermined level. It is a hammer drill device equipped with a pressure detection unit that operates even if leaked gas etc. exists in the surroundings.
It can be used for a long time with peace of mind.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hammer drill.

[0002]

[Prior art]

 Recently, ignition accidents due to hammer drills are increasing, and it is thought that the cause is that sparks from the cutting edge and sparks of the motor rotor ignite leaked gas. The former can prevent the generation of sparks by sprinkling water during construction, but the latter requires a system that does not incorporate it because the ambient air itself becomes a problem. As a solution to this problem, an enclosed type is commercially available as an improved type. Since this improved type does not take in ambient air, it does not inhale flammable gas such as leaked gas to explode, but its continuous operation is limited to about 10 minutes and its workability is poor and it is not practical. ..

[0003]

[Problems to be solved by the device]

 There is a demand for a hammer drill that can be used with peace of mind even if it is used for a long period of time or if leaked gas is present in the surroundings. At the same time, such a hammer drill significantly improves workability.

[0004]

[Means for Solving the Problems]

 The air intake of the hammer drill and the blower are connected via a blower pipe, and the blower pipe has a pressure that constitutes a safety device that stops the operation when the blower pressure to the hammer drill becomes a predetermined value or less. This is a device equipped with a detection unit.

[0005]

[Action]

 When the hammer drill is in use, air is blown from the blower through the blower pipe into the hammer drill, and the motor part of the hammer drill is cooled and discharged from the exhaust port. Since the blower is placed at an appropriate place away from the place where the hammer drill is used, even if leaked gas exists near the place where the hammer drill is used, there is no danger of explosion. If the blower fails, or if the blower pressure falls below a certain level due to some reason such as the blower pipe, the pressure detector detects the pressure and the safety device operates to activate the hammer drill. To stop immediately.

[0006]

【Example】

 Reference numeral 1 is a hammer drill, and 2 is a blower. The hammer drill 1 and the blower 2 are connected via a blower pipe 3, and the blower pipe 3 is provided with a safety device 4 for stopping the operation when the blower pressure to the hammer drill 1 is below a predetermined level. The pressure detecting unit 5 constituting the device is provided. Reference numeral 6 is a cord reel connected to a power source, 7 is a pressure gauge, and 8 is an exhaust port. When the hammer drill 1 is in use, air is blown from the blower 2 into the hammer drill 1 through the blower pipe 3, and the motor portion of the hammer drill 1 is cooled and discharged from the exhaust port 8. Since the blower 2 is placed in a safe place away from the place where the hammer drill 1 is used, there is no danger of explosion even if leaked gas exists near the place where the hammer drill 1 is used. When the blower 2 breaks down or the blower pressure becomes lower than a predetermined value due to some reason such as the blower pipe 3 or the like, the pressure detection unit 5 detects it and the safety device 4 works to immediately hammer hammer drill. Stop the operation of 1.

[0007]

[Effect of the device]

 Since the present invention is as described above, since the hammer drill is cooled, the hammer drill can be used for a long time, and the cooling air is not supplied by the ambient air. Even if leaked gas exists in the vicinity, there is no danger of explosion. If the blast pressure drops for some reason, the hammer drill itself will immediately stop operating, which can further ensure safety and greatly improve workability as a whole. And so on.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the whole of the present invention.

[Explanation of symbols]

 1 Hammer drill 2 Blower 3 Blower tube 4 Safety device 5 Pressure detector 6 Cord reel 7 Pressure gauge 8 Exhaust port

Claims (1)

[Scope of utility model registration] 1. A safety system in which an air intake of a hammer drill and a blower are connected through a blower pipe, and the blower pipe stops its operation when the blower pressure to the hammer drill is below a predetermined level. A hammer drill device characterized by having a pressure detection unit that constitutes the device.