Vibrating tools

Abstract

To provide a cover body that can make it difficult for vibration to be transmitted to a person holding the tool body of a vibration tool. [Solution] When the cover body 20 together with the operating part 45 is grasped by the worker's hand or a robot arm, etc., the operating part 45 is rotated and the exposed drive switch part 13 in contact with the operating part 45 is pressed in, causing the tool body 10 to start driving.The vibrations transmitted to the rear cover body part 22 in particular are reduced by the front coil spring part 35, rear coil spring part 36, and vibration absorber 40, and the vibrations imparted to the worker's hand or robot arm are significantly reduced compared to when a conventional impact tool is directly grasped.

Description

[Technical Field]

[0001] The present invention relates to an vibration tool that performs various operations by applying an impact to a workpiece. [Background technology]

[0002] BACKGROUND ART Conventionally, vibration tools such as the impact tool disclosed in Patent Document 1 are known in which the tool body is held by hand by an operator or by a robot arm to perform work. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-151682 Summary of the Invention [Problem to be solved by the invention]

[0004] The vibration tools described above are used by gripping the tool body to perform work, and the vibrations emitted by the tool body during work are strongly transmitted to the worker's hands and the robot arm, which can harm the worker's health and shorten the life of the robot arm.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide an oscillation tool that can solve the above problems. [Means for solving the problem]

[0006] The present invention is an vibration tool comprising a tool body that vibrates back and forth in a working state, and a tip tool attached to the tool body to which the vibration of the tool body is transmitted, and wherein work is performed by bringing the tip tool into contact with a workpiece, the vibration tool further comprising a cover body attached to the tool body and covering the tool body, a drive switch unit is provided on the tool body, an operation unit that is movable relative to the cover body is provided on the cover body, and the operation unit changes its position so that it comes into contact with or out of contact with the drive switch unit by moving the operation unit, and when the operation unit changes to a position that makes contact with the drive switch unit and the drive switch unit is turned on, the tool body starts to vibrate and enters a working state, and the cover body is supported by a non-operation unit side cover part attached to the tool body and the non-operation unit side cover part so as to be movable back and forth relative to the non-operation unit side cover part. and an operating unit side cover part to which the operating unit is connected, wherein an elastically deformable vibration absorbing body is interposed between the inner peripheral surface part of the operating unit side cover part and the outer peripheral surface part of the tool body, the elastically deformable vibration absorbing body being fitted onto the outer peripheral surface part of the tool body and being capable of contacting the inner peripheral surface part of the operating unit side cover part, and further wherein a front coil spring locking part is provided in front of the vibration absorbing body and a rear coil spring locking part is provided behind the vibration absorbing body, and the front coil spring in a state where it is elastically compressed within an elastically deformable range is interposed in the gap between the vibration absorbing body and the front coil spring locking part so as to be fitted onto the tool body, and the rear coil spring in a state where it is elastically compressed within an elastically deformable range is interposed in the gap between the vibration absorbing body and the rear coil spring locking part so as to be fitted onto the tool body.

[0007] In this configuration, the operating unit-side cover is disposed via a vibration absorber relative to the tool body, which is a vibration source, and the operating unit is provided on the operating unit-side cover. This significantly reduces vibrations transmitted to the operating unit that turns on the exposure drive switch. Furthermore, because the operating unit-side cover is movable back and forth relative to the non-operating unit-side cover, vibrations transmitted to the non-operating unit-side cover attached to the tool body are also less likely to be transmitted to the operating unit. Therefore, for example, when a worker, robot, or other operator holds the operating unit and performs work while maintaining the exposure drive switch in the on state, vibrations generated from the tool body can be prevented from being transmitted to the operator. This prevents damage to the worker's health and reduces the lifespan of the robot arm, even when the operator holds the operating unit while working. Furthermore, the expansion and contraction function of each coil spring effectively reduces forward and backward vibrations generated by the tool body, further reducing transmission of vibrations to the operating unit-side cover. [Effects of the Invention]

[0008] The present invention has the excellent effect of making it difficult for vibrations to be transmitted to the worker. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram of a vibration tool according to an embodiment. [Figure 2] FIG. 2 is an explanatory diagram of the vibration tool in a working state. DETAILED DESCRIPTION OF THE INVENTION

[0010] Examples of the present invention will be described in detail below. Note that the present invention is not limited to the examples shown below, and design changes are possible as appropriate.

[0011] As shown in Fig. 1, for example, a pneumatic vibration tool 1 includes a tool body 10 having an internal cylinder structure and a tip tool 11 attached to the front end of the tool body 10. With this configuration, the tip tool 11 can be pressed against a workpiece W (see Fig. 2) to apply an impact force to the workpiece W, thereby performing a required operation.

[0012] Furthermore, an exposed drive switch portion 13 that switches the drive state of the vibration tool 1 protrudes from the side peripheral surface of the tool body 10. By pressing the exposed drive switch portion 13 toward the tool body 10, the drive source of the vibration tool 1 is turned on, the tool body 10 starts to drive, and the tip tool 11 vibrates back and forth, scraping the surface of the workpiece W (see FIG. 2) that comes into contact with the tip of the tip tool 11 or removing unwanted matter adhering to the surface of the workpiece, such as flux produced during welding. Conversely, by releasing the exposure drive switch portion 13, the drive source is turned off and the tool enters a non-working state.

[0013] Next, the main part of the present invention will be described. A substantially cylindrical cover body 20 made of, for example, a resin material is attached to the vibration tool 1. More specifically, the cover body 20 is divided into a front and a rear part, and is configured with a front cover body part 21 arranged on the tip tool 11 side (the front side of the tool body 10) and a rear cover body part 22 arranged on the base end side of the tool body 10 (the rear side of the tool body 10).

[0014] The front cover main body 21 is made of a tubular member that is open toward the rear, and is fixed to the tool main body 10 in a manner that the tool main body 10 is housed within the tubular member. A hole 23 through which the tip tool 11 is inserted is provided in the front end of the front cover main body 21, and the tip tool 11 is protruded outward through the hole 23.

[0015] On the other hand, the rear cover main body 22 is made of a tubular member that opens toward the front, and the tool main body 10 is accommodated in this tubular member of the rear cover main body 22. A hole 24 through which the compressed air inlet 12 is inserted is formed at the rear end of the rear cover main body 22. A switch opening 25 through which the exposure drive switch 13 is inserted is formed in the rear part of the rear cover main body 22. One end of a long operating part 45 is rotatably attached to the rear cover main body 22 via a pivot support part 46, and by rotating the operating part 45, the exposure drive switch 13 can be pushed in.

[0016] Here, a mechanism by which the front cover main body 21 supports the rear cover main body 22 so that it can move back and forth will be described. A front support step 21A is formed at the rear end of the front cover main body 21, and a rear support step 22A is formed at the front end of the rear cover main body 22 that faces the rear end of the front cover main body 21. The front cover main body 21 and the rear cover main body 22 are assembled to each other by overlapping the front support step 21A and the rear support step 22A so that they come into surface contact with each other, and the rear cover main body 22 is supported relative to the front cover main body 21 so as to be movable back and forth.

[0017] Additionally, a front coil spring locking portion 15 is formed on the outer circumferential surface of the tool body 10 and is composed of a washer locked to a fixed ring member 14. Also, a rear coil spring locking portion 26 is formed at the rear of the tool body 10 and is composed of an end face of a larger diameter portion having a larger diameter than the tip side.

[0018] Further, a vibration absorber 40 is provided inside the rear cover main body 22. The vibration absorber 40 is fitted onto the outer peripheral surface 39 of the tool body 10 housed in the rear cover main body 22 and is interposed between the outer peripheral surface 39 and the inner peripheral surface 27 of the rear cover main body 22. The vibration absorber 40 is composed of an O-ring 17 fitted onto the outer peripheral surface 39, an annular body 41 disposed on the outer periphery of the O-ring 17, and a C-ring 42 fitted onto the annular body 41. In particular, the C-ring 42 of the vibration absorber 40 in this embodiment is a partially cutout metal annular body whose outer diameter is expandable and contractible. Because this partially cutout metal annular body is made of metal, it is highly durable and has a long lifespan. Furthermore, because it is a partially cutout metal annular body, it can expand and contract freely along the radial direction, thereby achieving the effect of timely absorbing vibrations that attempt to be transmitted from the tool body 10 to the rear cover main body 22. As for the partially cut-out annular metal body, for example, the one disclosed in Japanese Patent Application Laid-Open No. 2015-226976 can be suitably applied.

[0019] Furthermore, inside the rear cover main body 22, a washer 18 is disposed in front of the vibration absorber 40, and the front coil spring portion 35 is disposed between the vibration absorber 40 and the front coil spring locking portion 15 in a state where it is elastically compressed within its range of elastic deformation. On the other hand, inside the rear cover main body 22, a washer 19 is disposed behind the vibration absorber 40, and the rear coil spring portion 36 is disposed between the vibration absorber 40 and the rear coil spring locking portion 26 in a state where it is elastically compressed within its range of elastic deformation.

[0020] Next, a working state using the vibration tool 1 will be described. When driving the vibration tool 1, the cover body 20 is gripped together with the operating unit 45 by an operator's hand, a robot arm, or the like. That is, as shown in FIG. 2 , when the operating unit 45 is rotated and the exposure drive switch 13, which contacts the operating unit 45, is pressed, a predetermined vibration mechanism (not shown) is activated, and the tool body 10 begins to drive. The driven tool body 10 vibrates the tip tool 11 back and forth, and the tool body 10 also vibrates back and forth due to a reaction force. Under these circumstances, the vibration transmitted to the rear cover body 22, in particular, by the front coil spring 35, the rear coil spring 36, and the vibration absorber 40 is reduced. Therefore, the vibration imparted to the operator's hand or the robot arm is significantly reduced compared to when a conventional impact tool is directly gripped. To effectively achieve this configuration, the rear cover body 22 is supported so as to be freely movable back and forth relative to the front cover body 21. This allows the rear cover body 22 to move slightly back and forth, thereby suppressing the vibration transmitted to the operating unit 45. Furthermore, if the worker or the like changes the strength with which they push the rear cover main body 22 forward while holding the operating part 45 with the tip 11 pressed against the workpiece W, the contraction of the front coil spring part 35 and the rear coil spring part 36 can change the impact force transmitted to the workpiece W. It is desirable that the opening diameter of the switch opening 25 be determined to a dimension such that the rear cover main body 22 does not come into contact with the exposed drive switch part 13 during work.

[0021] In the above embodiment, the dimensions and shapes of each part can be freely selected as appropriate. By adjusting the wire diameters of the front coil spring portion 35, the rear coil spring portion 36 and the vibration absorber 40, the vibration absorption effect can be optimized.

[0022] The number of front coil spring portions 35, rear coil spring portions 36 and vibration absorbers 40 to be arranged is not particularly limited.

[0023] Furthermore, as described above, the cover body 20 is not limited to being held by the operator's hand to perform work, but can also be applied to being held by a robot arm to perform work, for example.

[0024] The vibration tool 1 may be a pneumatic vibration tool or an electric vibration tool. The vibration tool 1 may be used in the construction field, at production sites in the manufacturing industry, or by dentists, etc. The shape of the vibration tool 1 held by a worker, etc., may be a straight shape as in this embodiment, or may of course be a pistol shape. [Explanation of symbols]

[0025] 1 Vibrating tool 10 Tool body 11 Tip 12 Introduction 13 Exposure drive switch 14 Ring material 15 Front coil spring locking part 17 O-ring 18 Washer 19 Washer 20 Cover body 21 Non-operating section cover 21A Front support step 22 Operation unit side cover 22A Rear support step 23 Hole 24 Hole 25 Switch opening 26 Rear coil spring locking part 27 Inner circumference 35 Front coil spring section 36 Rear coil spring part 39 Outer circumference 40 Vibration absorber 41 Annular 42 C-ring 45 Operation section 46 axis branch

Claims

[Claim 1] A tool body that vibrates back and forth during operation; a tip tool attached to the tool body and to which vibration of the tool body is transmitted; An oscillation tool comprising: a tip tool that is brought into contact with a workpiece to perform work; a cover body attached to the tool body to cover the tool body; The tool body is provided with a drive switch unit, an operating unit that is movable relative to the cover body is provided on the cover body, and the operating unit is changed in position so as to come into contact with or not come into contact with the drive switch unit by moving the operating unit; When the operating unit is moved to a position in contact with the drive switch unit and the drive switch unit is turned on, the tool body starts vibrating and enters a working state. The cover body is a non-operation unit side cover portion attached to the tool body; an operating unit side cover part supported on the non-operating unit side cover part so as to be movable forward and backward relative to the non-operating unit side cover part, and to which the operating unit is connected; an elastically deformable vibration absorbing body is interposed between an inner peripheral surface of the operation unit side cover and an outer peripheral surface of the tool body, the vibration absorbing body being fitted onto the outer peripheral surface of the tool body and being capable of contacting the inner peripheral surface of the operation unit side cover; Furthermore, a front coil spring locking portion is provided in front of the vibration absorber, and a rear coil spring locking portion is provided behind the vibration absorber, and the front coil spring in a state where it is elastically compressed within an elastically deformable range is interposed in the gap between the vibration absorber and the front coil spring locking portion so as to fit externally onto the tool main body, and the rear coil spring in a state where it is elastically compressed within an elastically deformable range is interposed in the gap between the vibration absorber and the rear coil spring locking portion so as to fit externally onto the tool main body. An oscillatory tool characterized by:

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