KR20210012681A - Assist device for grinder - Google Patents

Abstract

Disclosed is an auxiliary device for a grinder capable of stably supporting a grinder and preventing an operator from being injured during work using the grinder. According to the present invention, the auxiliary device for a grinder comprises: a handle having a telescopic structure which is fastened to a grinder arm of the grinder; and a joint arm having a joint structure and one end detachably connected to the grinder arm.

Description

Assist device for grinder {Assist device for grinder}

The present invention relates to an auxiliary device for a grinder.

Various power devices operated by electricity, pneumatic pressure and hydraulic pressure are used for ship building work, etc., and it is common for workers to carry out the work for a long time with a power device.

Particularly, the grinding work performed on a welding part using a grinder, which is one of the power mechanisms, is a work of removing foreign substances such as welding beads or other scales formed on the hull, and is mainly performed by hand.

However, since the grinder is not only heavy with a weight of about 4 kg, but also works in an unnatural posture such as an upward looking work from the bottom of the ship, the worker feels physical fatigue of the arm, neck, and lower back pain. There is a problem that causes musculoskeletal disorders.

Korea Registered Utility Model No. 20-0112020 (Overhead Grinder) Korea Open Utility Model No. 20-2014-0003276 (Polishing device for finishing work)

An object of the present invention is to provide an auxiliary device for a grinder capable of stably supporting a grinder and preventing injury to an operator when working with a grinder.

The present invention allows a worker to work by moving the grinder horizontally using a handle located at the height of the chest, so that even in the case of an uplifting work, it is possible to work in a natural position as much as possible, so that the worker's fatigue can be greatly reduced. It is intended to provide an auxiliary device.

Objects other than the present invention will be easily understood through the following description.

According to an aspect of the present invention, a handle having a telescopic structure that is fastened to a grinder arm of a grinder; And a joint arm having a joint structure, wherein one end is detachably connected to the grinder arm, wherein the handle is coupled to the grinder arm through an angle adjusting unit for adjusting a relative angle with the grinder arm. An auxiliary device for a grinder is provided.

The auxiliary device for the grinder may further include a support portion for allowing the other end of the joint arm to be detachably connected so that the grinder maintains a predetermined working height. Here, the support part may be worn by a worker or installed on a device on which the worker rides. The support part worn by the worker, a vest worn by the worker on the upper body; And a first connection mechanism coupled to the vest and connected to the joint arm, wherein the support part installed on the mechanism is installed on a working crane on which the worker is boarded, and a first connection mechanism to which the joint arm is connected. It may include.

The joint arm may include a second connection mechanism connected to the first connection mechanism; A first joint rotatable in a transverse direction with respect to the second connecting mechanism; A first trimming link in which four links are connected in a square shape, coupled to the first joint, and an angle adjusted in a vertical direction; A second joint rotatable in a horizontal direction with respect to the first trimming link; A second trimming link having four links connected in a square shape, coupled to the second joint, and adjusting an angle in a vertical direction; A third joint rotatable in a horizontal direction with respect to the second trimming link; And a third connection mechanism coupled to the third joint and connected to the grinder arm.

A plurality of insertion holes may be formed in at least one of the first joint, the second joint, and the third joint, and an angle of the joint may be fixed by inserting a fixing pin into any one of the plurality of insertion holes.

The joint arm may further include a tension member made of an elastic material installed on at least one of the first trimming link and the second trimming link and installed on a pair of links facing up and down. The end of the tension member is fixed at the link so that the tension of the tension member may be adjusted.

The grinder arm and the joint arm may be connected to each other through an extension part. The extension part may include a holder on which the grinder arm is mounted; And a connecting portion connected to the holder and coupled to the joint arm, and the connecting portion may include a plurality of connecting rods selectively connected for length adjustment.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to an embodiment of the present invention, there is an effect of stably supporting a grinder and preventing injury to an operator when working with a grinder.

In addition, by allowing the worker to move the grinder horizontally using a handle located at the height of the chest, it is possible to work in a natural posture as much as possible even in the case of upper bogie work, thereby significantly reducing the fatigue of the worker.

1 is a view illustrating an installation shape of an auxiliary device for a grinder according to an embodiment of the present invention.
2 is a view showing a combined shape of a handle among auxiliary devices for a grinder according to an embodiment of the present invention.
Figure 3 is a view illustrating a working state using an auxiliary device for a grinder according to an embodiment of the present invention.
Figure 4 is a view showing the joint arm of the auxiliary device for a grinder according to an embodiment of the present invention.
5 and 6 are views for explaining an angle fixing structure in a joint arm of an auxiliary device for a grinder according to an embodiment of the present invention.
7 is a view showing the trimming link and the tension member of the joint arm in the auxiliary device for a grinder according to an embodiment of the present invention.
8 is a view showing an extension of the auxiliary device for a grinder according to an embodiment of the present invention.
9 to 13 are views showing another type of extension in the auxiliary device for a grinder according to an embodiment of the present invention.
14 is a view illustrating the role of the extension in the auxiliary device for a grinder according to an embodiment of the present invention.
15 is a view illustrating an installation shape of an auxiliary device for a grinder according to another embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

In addition, in the description with reference to the accompanying drawings, the same components are assigned the same or related reference numerals regardless of the reference numerals, and redundant descriptions thereof will be omitted. The accompanying drawings are somewhat exaggerated for convenience of description and understanding, and it is natural that the present invention is not limited to the size of each component shown in the accompanying drawings.

1 is a diagram illustrating an installation shape of an auxiliary device for a grinder according to an embodiment of the present invention, and FIG. 2 is a view showing a combined shape of a handle among auxiliary devices for a grinder according to an embodiment of the present invention. 3 is a diagram illustrating a working state using an auxiliary device for a grinder according to an embodiment of the present invention.

Referring to FIG. 1, the auxiliary device for a grinder according to an embodiment of the present invention includes a joint arm 120 and a support 130 for maintaining the grinder 110 to be positioned at an appropriate working height, and positioned at an appropriate working height. The grinder 110 may include a handle 115 that is fastened to the grinder 110 so that an operator can operate it in a natural posture. The grinder 110 is connected to the joint arm 120 so that some or all of the load of the grinder 110 may be supported by the joint arm 120.

The support part 130 fixes one end of the joint arm 120 to support the joint arm 120. The support unit 130 may include a first connection mechanism (not shown) for fixing the joint arm 120 and a vest worn by a worker.

As illustrated in Figure 1, the vest is a pair of tubes worn on the upper and lower portions of the operator's upper body, respectively (that is, the first tube 130a and the second tube 130b connected to the first tube 130a) It can be formed in the shape of. The vest may be provided with a first connection mechanism that connects the joint arm 120 and the vest, and the first tube 130a and the second tube 130b distribute the force applied by the joint arm 120 evenly. Can be combined with each other.

It is natural that the support 130 is not limited to a shape including a vest. That is, it may be installed on the crane 170, which is a mechanism on which the worker illustrated in FIG. 15 is boarded, and in addition, it may be manufactured in a shape worn on the lower body of the worker with a configuration such as an exoskeleton robot.

The joint arm 120 has a joint structure so that a worker can move and support the grinder 110 in a desired direction, and the first end side of the joint arm 120 is detachably connected to the support 130.

And the second end side of the joint arm 120, the grinder 110 may be detachably connected, the load and vibration when the grinder 110 connected to the joint arm 120 is driven is through the joint arm 120 Distributed to the support 130. At this time, the joint arm 120 may serve to support at least a portion of the load of the grinder 110.

The grinder 110 connected to the second end side of the joint arm 120 may include, for example, a grinder arm 113 to which the grinding wheel 111 and the grinding wheel 111 are rotatably coupled to each other.

A handle 115 may be fastened to the grinder arm 113 of the grinder 110. Here, as illustrated in FIG. 2, the handle 115 may be provided in a plurality (see 115a and 115b of FIG. 2A) so that the operator can hold it with the left and right hands, respectively.

The handle 115 may be fastened to the grinder arm 113 of the grinder 110 through the angle adjusting part 117. The angle adjustment unit 117 is a relative angle between the handle 115 and the grinder arm 113 adjusted by the operator according to the working situation, as illustrated in FIGS. 2B to 2D, respectively (for example, 0 The tightening state is released so that an arbitrary angle of degrees to 100 degrees) can be adjusted, and the tightened state can be operated to maintain the tightened state so that the adjusted relative angle is fixed.

The handle 115 may be formed in a telescopic structure so that the length can be adjusted in the longitudinal direction of the body, as illustrated in (a) of FIG. 2. Through this, the operator can adjust the length of the handle 115 according to his height.

The operator positions the grinder 110 to a desired working height using the joint arm 120 and the support 130, adjusts the length of the handle 115 according to the key, and adjusts the angle adjustment unit 117 to suit the working situation. You can use it to adjust the angle. Therefore, the operator can proceed with the work by moving the grinder 110 forward while holding the handle 115 located at the chest height as illustrated in FIG. 3B.

That is, in the prior art, even if the grinder 110 is positioned at the working height by using the grinder height fixing device corresponding to the joint arm 120 of the present embodiment, the operator raises his hand and holds the grinder 110 and moves forward. There was no choice but to proceed the operation in a manner (see Fig. 3 (a)). This work method has a problem of causing fatigue and pain in the shoulder or back of a worker due to an unnatural working posture, and causing musculoskeletal diseases.

In contrast, the auxiliary device for a grinder according to the present embodiment has a characteristic that the operator can operate the grinder 110 located at the working height by gripping the handle 115 located at the chest height, so that the work can be done in a natural posture. , This has the advantage of enabling a more comfortable and safe work by greatly reducing the fatigue of the worker.

Figure 4 is a view showing the joint arm of the auxiliary device for a grinder according to an embodiment of the present invention, Figures 5 and 6 illustrate an angle fixing structure in the joint arm of the auxiliary device for a grinder according to an embodiment of the present invention It is a drawing. 7 is a view showing the trimming link and the tension member of the joint arm in the auxiliary device for a grinder according to an embodiment of the present invention, Figure 8 is a view showing an extension of the auxiliary device for a grinder according to an embodiment of the present invention . Hereinafter, when a component to be described with reference to the related drawings has a slight sense of distance from the handle 115, the shape of the handle 115 in the drawing may be omitted for convenience of understanding.

Referring to FIG. 4, the joint arm 120 may include a first connection device provided on the support part 130 and a second connection device 212 that is detachable. For example, the first connection mechanism may be a first block in which a “c”-shaped groove is formed, and the second connection mechanism 212 may be configured as a second block inserted into a groove formed in the first connection mechanism. In this case, pinholes penetrating through the first block and the second block may be formed to be connected by a ball lock pin or the like.

In addition, the first connection mechanism and the second connection mechanism 212 can be replaced in the support portion 130 and the joint arm 120, respectively, and may be replaced with other connection mechanisms. For example, the first connection mechanism and the second connection mechanism 212 may be a pair of magnetic bodies coupled by magnetic force, or may be connected to each other through a clamp structure.

As illustrated in FIG. 4, the joint arm 120 includes a pair of trimming links 220 and 240 in which four links are connected in a square shape, and 3 connecting the ends and between the trimming links 220 and 240, respectively. It may be composed of four joints (210, 230, 250).

Specifically, the joint arm 120 of the present embodiment is a first joint 210 that can rotate in the horizontal direction with respect to the second connection mechanism 212, the first joint 210 that is coupled to the first joint 210 and the angle is adjusted in the vertical direction. 1 trimming link 220, a second trimming link 240 that is coupled to the second joint 230 and the second joint 230, which can rotate in the horizontal direction with respect to the first trimming link 220, and the angle is adjusted in the vertical direction. ) And a third joint 250 that can rotate in a horizontal direction with respect to the second trimming link 240.

Accordingly, the upper and lower heights and the front and rear distances of the grinder 110 may be adjusted with a pair of trimming links 220 and 240. In addition, the grinder 110 may be moved horizontally and rotated by three joints 210, 230, 250 rotating horizontally. In this case, the third connection mechanism 260 may be coupled to the third joint 250 and may be detachably connected to the grinder 110.

Referring to FIG. 7, the structure of the trimming link will be described in detail, a pair of short links 221 and 222 respectively coupled to the first joint 210 and the second joint 230 in the first trimming link 220 ), a pair of long links 223 and 224 face each other and are connected in a rectangular structure.

Accordingly, the height and distance of the second joint 230 with respect to the first joint 210 may be adjusted according to the angle at which the pair of long links 223 and 224 are erected. The second trimming link 240 may be formed in a similar structure.

At this time, when a pair of long links (223, 224) face up and down and a tension member 226 made of an elastic material is installed between them, the tension member 226 is a load applied to the second joint 230 You can receive and support. Accordingly, when the load or vibration of the grinder 110 is transmitted to the joint arm 120, the tension member 226 may receive it and support or buffer it.

In addition, in the joint arm 120, at least one of the first joint 210, the second joint 230, and the third joint 250 may be fixed at a constant angle by a fixing pin.

As illustrated in FIG. 5, the second joint 230 may be formed in a “c” shape, and a pair of accommodating members 232 and 234 and accommodating members 232 and 234 facing each other with open portions It may include an insertion block 236 that is hinged to the end is inserted into the open space of.

At this time, each receiving member (232, 234) may be radially formed with a plurality of insertion holes (233, 235) around the hinge axis, the insertion block (236) in correspondence with the insertion holes (233, 235) A fixing pin support portion 237 having a hole formed therein may be formed. Accordingly, after the worker arranges the joint at a desired angle, the fixing pins 230a and 230b are inserted into the insertion holes 233 and 235 to fix the insertion block 236 with respect to the receiving members 232 and 234 at a desired angle. I can.

In addition, if the fixing pins 230a and 230b are not inserted into the fixing pin support 237 and the fixing pins 230a and 230b are inserted only into the insertion holes 233 and 235, the insertion block 236 is prevented from rotating at a certain angle or more. You can also limit it.

And, as illustrated in FIG. 6, when the length of the auxiliary device for the grinder is longer than the arm of the worker, the joint arm 120 may be bent to reduce the distance to the grinder 110. At this time, each joint (210, 230, 250) may be fixed at a desired angle by using the fixing pins (210a, 230a, 230b, 250a).

In addition, the tension of the tension member 226 may be adjusted according to the grinder 110 connected to the joint arm 120. For example, the end of the tension member 226 is coupled to the member 225 that slides in the groove 223a formed in the longitudinal direction on the link 223, and the setting length of the tension member 226 can be changed. Through it, the tension of the tension member 226 can be adjusted.

On the other hand, as illustrated in FIG. 8, when the grinder 110 is connected to the joint arm 120, an extension portion 350 for extending the grinder 110 is added between the grinder 110 and the joint arm 120 Can be.

The extension part 350 may include a holder on which the grinder 110 is mounted and a connection part connected to the holder and coupled to the joint arm 120. The connecting portion may include a plurality of connecting rods 370 that can be coupled and separated. The connecting rods 370 may be selectively connected to allow length adjustment and angle adjustment.

A socket 360 structure into which the grinder arm 113 of the grinder 110 for grinding may be inserted may be used as a holder. In addition, to adjust the angle of the grinder 110, the socket 360 may be rotatably mounted on the first connecting rod 370 bent in a right angle shape. In this case, the first connecting rod 370 and the socket 360 may be connected to each other by the rotating member 362.

9 to 13 are views showing another type of extension in the auxiliary device for a grinder according to an embodiment of the present invention.

Referring to FIG. 9, the extension part 352 may support the grinder 110 so that the grinder 110 can rotate in three axes. In this case, the extension part 352 may further include rotating members 366 and 390 connected to the holder and/or the connecting rod 370 to enable the holder or other connecting rod 370 to rotate. For example, by connecting between the first connecting rod 370 of the right angle shape and the second connecting rod 380 of the straight shape with the first rotating member 390, the second connecting rod 380 coupled to the joint arm 120 With respect to, the first connecting rod 370 may be rotated. In addition, by connecting between the first connecting rod 370 and the socket 365 with a second rotating member 366, the socket 365 may be rotated with respect to the first connecting rod 370. In addition, the grinder 110 mounted on the socket 365 may rotate with respect to the socket 365. The rotation shafts of the first rotation member 390, the second rotation member 366, and the socket 365 are disposed at right angles to each other, so that the grinder 110 may be supported to be rotated in three axes.

Referring to FIGS. 10 and 11, the holder may include a band 368 over which a major tool is applied. At this time, the grinder 110 may be inserted into the annular band 368 and supported across the band 368 by its own load. In addition, in order to prevent separation of the grinder 110, the band 368 may be tightened to hold the grinder arm 113 and restrain it.

In addition, referring to FIG. 12, the holder on which the grinder 110 is mounted may be attached to and detached from the connection portion without a separate mechanism using a butterfly bolt 374. For example, in the extension portion 356 of the present embodiment, the connection portion further includes an extension rod 372 extending from the connection rod 370, and the socket 360 is a receiving portion 361 into which the extension rod 372 is inserted. Including, the end of the extension rod 372 inserted into the receiving portion 361 may be coupled with a butterfly bolt 374. In this case, the extension rod 372 may have a structure that rotates in the longitudinal direction as a rotation axis. Also, the angle of the socket 360 with respect to the extension rod 372 may be adjusted around the butterfly bolt 374.

In addition, referring to FIG. 13, in the extension part 356 of the present embodiment, the holder may include a rotation support member 363 for rotatably supporting the grinder 110. The grinder 110 is rotatably supported by being fitted with a pin or the like to the rotation support member 363. A receiving portion 364 into which the extension rod 372 is inserted is formed in the rotation support member 363 and may be coupled to the extension rod 372 by a butterfly bolt 374.

As described above, in the present embodiment, the extensions 350, 352, 354, 356, 358 connect the joint arm 120 and the grinder 110, and the relative of the grinder 110 to the joint arm 120 It can have a function of adjusting the height and angle.

14 is a diagram illustrating the role of an extension in an auxiliary device for a grinder according to an embodiment of the present invention.

Referring to FIG. 14, when explaining the role of the extension part 350, as shown in (a) and (b), the extension part 350 is set to a height similar to the upper end of the joint arm 120 and the operator In the case of working on the horizontal surface 5 above the head, when the operator tilts the body, the support part 100 and the joint arm 120 are also inclined, and the end of the joint arm 120 is more than the grinder 110 It may rise and collide with the surface 5 on which the work is performed.

At this time, as shown in (c) and (d), when replacing with an extension part 350 that increases the height of the grinder 110, the joint arm 120 can be prevented from colliding with the surface 5 on which the work is performed. I can. In other words, the extension part 350 may help to optimize the arrangement of the grinder 110 according to the environment in which the work is performed.

15 is a view illustrating an installation shape of an auxiliary device for a grinder according to another embodiment of the present invention.

As illustrated in FIG. 15, the joint arm 120 of the auxiliary device for a grinder may be coupled to a boarding device such as a crane 170 for work on which an operator is boarded. This is because, in some cases, an operator may ride a crane or the like and perform work using the grinder 110 from a high place.

At this time, the first connection mechanism 172 is installed in the safety bar of the working crane 170 and the joint arm 120 may be connected.

The first connection mechanism 172 may include, for example, a support plate 174 to which the joint arm 120 is coupled and a U-shaped bolt 176 for coupling the support plate 174 to a crane.

Accordingly, on the ground, an operator can work by wearing an auxiliary device for a grinder on the body (see Fig. 1), and at high altitude, the auxiliary device for a grinder can be moved from the operator's body to a crane and installed to perform stable work. Yes (see Fig. 15).

Although the above has been described with reference to the embodiments of the present invention, those of ordinary skill in the relevant technical field can add, change, delete or add components within the scope not departing from the spirit of the present invention described in the claims. Accordingly, the present invention can be variously modified and changed, and it will be said that this is also included within the scope of the present invention.

110: grinder 111: grinding wheel
113: grinder arm 115: handle
120: joint arm 130: support
170: crane 172: first connecting mechanism
174: support plate 176: U-shaped bolt
212: second connecting mechanism 210: first joint
220: first emissary link 221, 222, 223, 224: link
226: tension member 230: second joint
240: second trimming link 250: third joint
260: third connecting mechanism 350, 352, 354, 356, 358: extension
360, 365: sockets 362, 366, 390: rotating member
368: band 370, 380: connecting rod

Claims (6)

A handle of a telescopic structure fastened to a grinder arm of a grinder; And
It has a joint structure and includes a joint arm having one end detachably connected to the grinder arm,
The handle is coupled to the grinder arm through an angle adjustment portion for adjusting a relative angle with the grinder arm, an auxiliary device for a grinder. The method of claim 1,
The other end of the joint arm is connected detachably, further comprising a support for maintaining a predetermined working height of the grinder,
The support is worn by the worker or installed on the device on which the worker is boarded,
The support part worn by the worker, a vest worn by the worker on the upper body; And a first connection mechanism coupled to the vest and connected to the joint arm,
The support unit installed on the mechanism is installed on a crane for work on which the worker is boarded and includes a first connection mechanism to which the joint arm is connected. The method of claim 2,
The joint cancer,
A second connection mechanism connected to the first connection mechanism;
A first joint rotatable in a transverse direction with respect to the second connecting mechanism;
A first trimming link in which four links are connected in a square shape, coupled to the first joint, and an angle adjusted in a vertical direction;
A second joint rotatable in a horizontal direction with respect to the first trimming link;
A second trimming link having four links connected in a square shape, coupled to the second joint, and adjusting an angle in a vertical direction;
A third joint rotatable in a horizontal direction with respect to the second trimming link; And
An auxiliary device for a grinder including a third connecting mechanism coupled to the third joint and connected to the grinder arm. The method of claim 3,
At least one of the first joint, the second joint, and the third joint,
An auxiliary device for a grinder in which a plurality of insertion holes are formed and a fixing pin is inserted into any one of the plurality of insertion holes to fix the angle of the joint. The method of claim 3,
It is installed on at least one of the first trimming link and the second trimming link, further comprising a tension member of an elastic material installed on the pair of links facing up and down,
The end of the tension member is a fixed position in the link is adjusted to adjust the tension of the tension member, auxiliary device for a grinder. The method of claim 1,
The grinder arm and the joint arm are connected to each other through an extension part,
The extension part,
A holder on which the grinder arm is mounted; And
And a connection part connected to the holder and coupled to the joint arm,
The connection portion includes a plurality of connection rods selectively connected for length adjustment, the auxiliary device for a grinder.

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