JP2020148261A - Wrong operation prevention method - Google Patents

Abstract

To reliably prevent wrong operation using an inexpensive jig having a simple structure.SOLUTION: In a slow leak valve 202 that is operated by inserting an operation member into a hole part 400 for operation and rotating the operation member around an insertion direction of the operation member, in order to prevent wrong operation, a wrong operation preventive tool 500, which is not operated even when it is inserted into the hole part 400 and rotated, is inserted into the hole part 400 when the slow leak valve 202 is not operated, and then a tip is brought into contact with the bottom part of the hole part 400. At that time, the tip of the wrong operation preventive tool 500 is projected from the hole part 400 so that a length in the insertion direction into the hole part 400 is longer than a depth of the hole part 400. The wrong operation preventive tool 500 uses an elastic member or the like.SELECTED DRAWING: Figure 6

Description

The present invention relates to an erroneous operation preventive tool that prevents an erroneous operation in an operation unit that performs an operation by inserting the operation member into a hole for operation and rotating the operation member about the insertion direction of the operation member.

Traditionally, hydraulic operating devices may have a plurality of different valves in close proximity. In that case, the operator had to carefully check each valve, carefully identify which valve should be operated and which valve should not be operated, and be careful not to make an erroneous operation.

Specifically, as a related technique, for example, it is composed of a cap that covers the operation portion (screw), a support that supports the cap, and a fixing member that fixes the cap to the support, and the fixing member is attached to the side surface of the cap. There is a technique related to an erroneous operation prevention cap for fixing the cap by tightening it from a screw hole provided in (see, for example, Patent Document 1 below).

Japanese Unexamined Patent Publication No. 2004-270784

However, if the adjusting holes of the respective valves have the same shape, they may all be adjusted by the same tool. Therefore, there was a sufficient possibility that the valve that should be adjusted was originally intended to be adjusted, and the valve that should not be adjusted was mistakenly adjusted. In this regard, the current situation was to rely solely on the attention of workers without any measures. In addition, it was not realistic to spend a lot of money on the countermeasures.

In the unlikely event that you accidentally adjust a valve that should not be adjusted, you may have to request the dispatch of an expert to correct it, which incurs time and unnecessary costs. At the same time, there was a problem that many obstacles were caused to the operation of the equipment during that period.

An object of the present invention is to surely prevent erroneous operation by using a jig having a simple structure and being inexpensive in order to solve the above-mentioned problems caused by the prior art.

In order to solve the above-mentioned problems and achieve the object, the erroneous operation prevention method according to the present invention inserts an operation member into a hole for operation and rotates the operation member around the insertion direction of the operation member. When the operation unit does not operate the erroneous operation prevention tool, which is a method for preventing erroneous operation in the operation unit that is operated by the operation unit and is not operated even if it is inserted into the hole portion and rotated. It is characterized in that it is inserted into the hole.

Further, the erroneous operation prevention method according to the present invention is characterized in that, in the above invention, the erroneous operation prevention tool has a length in the insertion direction into the hole portion longer than the depth of the hole portion.

Further, in the erroneous operation prevention method according to the present invention, in the above invention, the hole portion has a polygonal cross section perpendicular to the insertion direction of the operation member, and the erroneous operation prevention tool is inserted into the hole portion. The cross section orthogonal to the direction is characterized in that the shape is different from the shape of the hole portion.

Further, the erroneous operation prevention method according to the present invention is characterized in that, in the above invention, the erroneous operation prevention tool is made of a material having an elastic force.

Further, the erroneous operation prevention method according to the present invention is characterized in that, in the above invention, a display member for calling attention to erroneous operation is provided at one end of the side where the erroneous operation prevention tool is not inserted into the hole. ..

Further, the erroneous operation prevention method according to the present invention is characterized in that, in the above invention, the erroneous operation prevention tool is provided with a lid member covering the operation portion at one end of the side not inserted into the hole portion.

Further, the erroneous operation prevention method according to the present invention is characterized in that, in the above invention, the lid member is integrally formed with the erroneous operation prevention tool.

Further, the method for preventing erroneous operation according to the present invention is characterized in that, in the above invention, a display calling attention to erroneous operation is displayed on the surface of the lid member.

Further, the erroneous operation prevention method according to the present invention is to insert an operation member into a hole for operation and rotate the operation member around the insertion direction of the operation member to perform an erroneous operation in the operation unit. It is a method for preventing erroneous operation to prevent erroneous operation, and is characterized in that an erroneous operation preventing tool is attached so as to cover the operating portion when the operation is not performed.

Further, the method for preventing erroneous operation according to the present invention is characterized in that, in the above invention, a display calling attention to erroneous operation is displayed on the surface of the erroneous operation preventing tool.

According to the erroneous operation prevention method according to the present invention, erroneous operation can be reliably prevented by using a jig or the like which has a simple structure and is inexpensive.

It is explanatory drawing which shows an example of a general hydraulic operation housing. It is explanatory drawing which shows an example of the internal structure of the general hydraulic operation housing. It is explanatory drawing which shows an example of the appearance of a general manual pressure drop valve. It is explanatory drawing which shows an example of the appearance of a general slow leak valve. It is explanatory drawing (the 1) which shows the state which attached the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (the 2) which shows the state which attached the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (the 1) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (the 2) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (the 3) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (the 4) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (No. 5) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention. It is explanatory drawing (No. 6) which shows another example of the structure of the erroneous operation prevention tool in the erroneous operation prevention method of embodiment which concerns on this invention.

Hereinafter, preferred embodiments of the erroneous operation prevention method according to the present invention will be described in detail with reference to the accompanying drawings.

(Overview of valve operation unit)
First, an outline of the operation unit in the method for preventing erroneous operation according to the embodiment of the present invention will be described. FIG. 1 is an explanatory view showing an example of a general hydraulic operation housing. Further, FIG. 2 is an explanatory view showing an example of the internal configuration of a general hydraulic operation housing.

In FIG. 1, a valve operating portion 101 is provided in the hydraulic operating housing 100 on the left side of the hydraulic operating housing 100. FIG. 2 is an enlarged view of the valve operating unit 101.

In FIG. 2, the valve operating unit 101 has two valves, a manual pressure drop valve 201 and a slow leak valve 202, at close positions. In FIG. 2, the manual pressure drop valve 201 is on the left side, and the slow leak valve 202 is on the right side, and is provided at a position slightly lower than the manual pressure drop valve 201.

The manual pressure drop valve 201 is used by the operator to check the operation of the device by looking at the patrol data and not performing the desired movement (specifically, for example, pump operation 40 times / day or less). Therefore, the manual pressure drop valve 201 is a valve operated by the operator, and gives the operator the authority to operate the valve.

On the other hand, the slow leak valve 202 is not operated by the worker in normal work, and the worker is often not authorized to operate the slow leak valve 202. As a general rule, this slow leak valve 202 is adjusted by an expert who is in charge of the manufacturer, and the viscosity of the oil changes depending on the outside temperature, air temperature, etc., so it should be adjusted according to the outside temperature, air temperature, etc. The slow leak valve 202 is fairly difficult to adjust because it has to be adjusted.

As can be seen from FIGS. 3 and 4 described later, since the adjustment holes (hexagonal holes) of the manual pressure drop valve 201 and the slow leak valve 202 have the same shape, both can be adjusted by the same tool. .. Therefore, there is a risk of accidentally adjusting the slow leak valve 202, which should not be adjusted, with the intention of adjusting the manual pressure drop valve 201.

In the unlikely event that the slow leak valve 202 is adjusted by mistake, the person in charge of the manufacturer must be requested to correct it, which causes unnecessary costs to correct and hinders equipment operation. There is a point.

FIG. 3 is an explanatory view (top view) showing an example of the appearance of a general manual pressure drop valve. The manual pressure drop valve 201 is provided upward in the hydraulically operated housing 100. As shown in FIG. 3, "pressure drop valve" is described on the upper surface of the manual pressure drop valve 201. Further, an operation hole 300 is provided near the center of the upper surface thereof. Further, the upper surface is described as "normally closed", which indicates that the valve is normally closed.

An operating member (specifically, an operating tool such as a hexagon wrench), which is not shown, is inserted straight into the hole 300 from the upper side to the lower side. Then, the tip of the operating member comes into contact with the bottom surface of the hole 300. In that state, the operation can be performed by rotating the operation member around the insertion direction of the operation member.

When the operating member of the hole 300 is cross-sectionally orthogonal to the insertion direction, that is, when the hole 300 is viewed from above, it has a polygonal shape (specifically, for example, a hexagon) as can be seen from FIG. ing. Therefore, a hexagonal wrench having a size suitable for the hexagon of the hole 300 is inserted into the hole 300, and the hexagon wrench inserted into the hole 300 is used to rotate the hole 300. The opening and closing of the manual pressure drop valve 201 can be adjusted.

More specifically, when the hexagon wrench is rotated clockwise, the manual pressure drop valve 201 opens, and conversely, when it is rotated counterclockwise, the manual pressure drop valve 201 closes. It can be seen from the directions of the two arrows written near the periphery of the hole 300 on the upper surface and the description of "open" and "closed".

The manual pressure drop valve 201 operates as desired while checking the operation of the device when the desired number of operations (specifically, for example, pump operation 40 times / day or less) is not reached by looking at the patrol data. Adjust the amount of oil flowing so that the number of times is reached. The manual pressure drop valve 201 is also adjusted more frequently by using the manual pressure drop valve 201, usually when the viscosity of the oil decreases, such as in winter.

FIG. 4 is an explanatory view (top view) showing an example of the appearance of a general slow leak valve. The slow leak valve 202 is provided upward in the hydraulically operated housing 100 like the manual pressure drop valve 201, and as shown in FIG. 4, the slow leak valve 202 is described on the upper surface thereof as a “slow leak valve”. ing. Further, a hole 400 for operation is provided near the center of the upper surface thereof. Further, on the upper surface, "always open" is described, which indicates that the state is normally open.

Similar to the manual pressure drop valve 201, the slow leak valve 202 inserts an operating member (specifically, for example, a hexagon wrench) into the hole 400 from the upper side straight to the lower side. Then, the tip of the operating member comes into contact with the bottom surface of the hole 400. In that state, the operation can be performed by rotating the operation member around the insertion direction of the operation member.

The operation member of the hole 400 has a cross section orthogonal to the insertion direction, that is, a polygonal (hexagonal) shape as can be seen from FIG. Therefore, the opening and closing of the slow leak valve 202 can be adjusted by inserting a hexagon wrench having a size suitable for the hexagon of the hole 400 into the hole 400 and rotating the hexagon wrench. This is also the same as the manual pressure drop valve 201.

More specifically, when the hexagon wrench is rotated counterclockwise, the slow leak valve 202 is opened, and conversely, when it is rotated clockwise, the slow leak valve 202 is closed. It can be seen from the direction of the counterclockwise arrow written near the periphery of the hole 400 on the upper surface and the description of "open".

As described above, since the manual pressure drop valve 201 and the slow leak valve 202 have the same adjustment hole (hexagonal hole) and almost the same size, they are both operated by the same operating member (operating tool). It can be adjusted. Therefore, the worker intends to adjust the manual pressure drop valve 201, and there is a risk that the slow leak valve 202, which should not be adjusted, may be mistakenly adjusted.

If the slow leak valve 202 is erroneously adjusted, as described above, unnecessary costs will be incurred to correct it, and equipment operation (specifically, for example, pump operation 40 times / day) will be incurred. The following) will be hindered.

(Contents of erroneous operation prevention tool)
5 and 6 are explanatory views showing a state in which the erroneous operation prevention tool is attached in the erroneous operation prevention method according to the embodiment of the present invention. FIG. 5 shows a top view of the slow leak valve 202 as viewed from above, as in FIG. 4, and FIG. 6 shows a side view of the slow leak valve 202 as viewed from the direction of arrow A in FIG. There is.

In FIGS. 5 and 6, an erroneous operation preventive tool 500 is inserted into the hole 400. Even if the erroneous operation preventive tool 500 is inserted into the hole 400 and rotated in the same manner as the hexagon wrench, the valve adjustment operation is not performed. By inserting the erroneous operation prevention tool 500 into the hole 400 when the slow leak valve 202 is not operated, it is possible to prevent the erroneous operation of the slow leak valve 202.

That is, when the slow leak valve 202 is to be operated and a hexagon wrench for operation is to be inserted into the hole 400, the erroneous operation preventive tool 500 is already inserted into the hole 400. The hexagon wrench cannot be immediately inserted into the hole 400.

The worker who confirmed it calmly thought that the hexagon wrench could not be inserted into the hole 400 immediately and should not be operated by inserting the hexagon wrench here. Judging, it becomes possible to grasp that this is not the manual pressure drop valve 201 that is allowed to be operated by the worker, but the slow leak valve 202 that is not allowed to be operated by the worker.

In this way, due to the presence of the erroneous operation prevention tool 500, it is possible to reliably prevent a human error in which an operator operates the slow leak valve 202, which is prohibited from being operated, by rushing to operate the tool 500. Can be done.

As can be seen from FIG. 6, the erroneous operation preventive tool 500 may have a length in the insertion direction into the hole 400 longer than the depth of the hole 400. With this configuration, the other end of the erroneous operation prevention tool 500 in the longitudinal direction protrudes from the hole 400 in a state where the tip in the longitudinal direction of the erroneous operation prevention tool 500 is in contact with the bottom surface of the hole portion 400.

Since the erroneous operation preventive tool 500 protrudes from the hole portion 400, the erroneous operation preventive tool 500 can be easily attached to and detached from the hole portion 400 by pinching the protruding portion with a finger or the like. However, if the protruding portion is too long, the weight of the protruding portion makes it easy for the erroneous operation preventive tool 500 to fall out of the hole 400. Therefore, it is advisable to project the erroneous operation preventive tool 500 from the hole by about 5 mm.

Further, the erroneous operation preventive tool 500 may have a cross section orthogonal to the insertion direction into the hole 400, which is different from the polygonal shape (for example, hexagon) of the hole 400. Specifically, it is preferable that the shape is a polygon having a larger number of angles than the polygon of the hole 400 or a shape close to a circle. As a result, the side surface of the erroneous operation preventive tool 500 does not get caught in the side surface of the hole portion 400, and even if the erroneous operation preventive tool 500 is rotated, the erroneous operation preventive tool 500 idles in the hole portion 400. Therefore, it is possible to prevent the valve operation of the hole 400 from being performed in conjunction with the rotation of the erroneous operation prevention tool 500.

More specifically, the erroneous operation preventive tool 500 may have a cylindrical shape having a circular cross section orthogonal to the insertion direction into the hole 400. If the erroneous operation preventive tool 500 has a cylindrical shape, when the hole portion 400 is hexagonal, the erroneous operation preventive tool 500 will idle in the hole portion 400 without being caught by the hexagonal side surface of the hole portion 400.

Further, the erroneous operation prevention tool 500 may be made of a material having an elastic force. Specifically, it is preferable to use a material such as rubber or sponge. In this way, if the erroneous operation preventive tool 500 has an elastic force, the frictional force between the erroneous operation preventive tool 500 and the side surface of the hole portion 400 increases, and the erroneous operation preventive tool 500 is less likely to accidentally fall out of the hole portion 400. Can be done. Further, the erroneous operation prevention tool 500 can prevent the hole 400 of the slow leak valve 202 from being damaged by using a material such as rubber or sponge.

More specifically, the erroneous operation preventive tool 500 may be something like an "eraser" housed in the knock portion of the mechanical pencil. This eraser has a substantially cylindrical shape and has elastic force. It is desirable that the erroneous operation preventive tool 500 has such a simple structure and an inexpensive material.

The erroneous operation prevention tool 500 may be colored in a predetermined color, including the meaning of calling the operator's attention. Specifically, it is better to use a color such as red or yellow that allows the operator to intuitively detect danger and be cautious when dealing with it.

7A and 7B are explanatory views showing another example of the configuration of the erroneous operation prevention tool in the erroneous operation prevention method according to the embodiment of the present invention. FIG. 7A shows a top view of the slow leak valve 202 as viewed from above, as in FIG. Further, FIG. 7B shows a side view of the slow leak valve 202 as viewed from the direction of arrow B in FIG. 7A, similarly to FIG.

In FIGS. 7A and 7B, the other end of the erroneous operation preventive tool 500 in the longitudinal direction protrudes from the hole 400 in a state where the tip of the erroneous operation preventive tool 500 in the longitudinal direction is in contact with the bottom surface of the hole portion 400. Further, a display member 700 is provided at the other end.

As can be seen from FIG. 7A, the display member 700 has a rectangular shape and is smaller in size than the circular shape of the slow leak valve 202. Further, as can be seen from FIG. 7B, the display member 700 may have almost no thickness. However, the shape of the display member is not limited to this, and may be any other shape.

On the display member 700, characters, symbols, figures, etc. that call attention to erroneous operation, or a combination thereof can be written. Specifically, as shown in FIG. 7A, the characters "operation prohibited" are written. In addition, the background of the display member 700 may be colored in red, yellow, or the like in order to draw more attention.

By providing the display member 700 on the erroneous operation prevention tool 500, it is intuitively understood that the valve should not be operated by looking at the display of the display member 700, so that the operator may erroneously operate the valve. (Operating a valve that should not be operated) can be prevented more reliably.

A modification of the erroneous operation prevention tool 500 is shown in FIGS. 8A and 8B. 8A and 8B are explanatory views showing another example of the configuration of the erroneous operation prevention tool in the erroneous operation prevention method according to the embodiment of the present invention. 8B shows a state in which the erroneous operation preventive tool 800 of FIG. 8A is turned upside down with respect to FIG. 8A.

In FIGS. 8A and 8B, the erroneous operation preventive tool 800 has an insertion member 801 and a lid member 802. Here, the insertion member 801 is a member to be inserted into the hole 400 of the slow leak valve 202. Further, the lid member 802 is connected to one end of the insertion member 801. The lid member 802 has a circular shape having substantially the same size and substantially the same shape as the upper surface of the slow leak valve 202.

Then, when the other end of the insertion member 801 is inserted so as to abut against the bottom surface of the hole portion 400, the lid member 802 is configured to cover the upper surface of the slow leak valve 202. As a result, it is possible to more reliably prevent the erroneous operation preventive tool 800 (insertion member 801) from accidentally falling out of the hole 400.

In the erroneous operation preventive tool 800, the insertion member 801 and the lid member 802 may be formed separately and may be connected by adhering them with an adhesive or the like. Further, both may be manufactured by integral formation. In that case, work for connecting the two, such as bonding, becomes unnecessary.

More specifically, the erroneous operation preventive tool 800 may have a shape such as a so-called "ramune lid". It is desirable that the erroneous operation preventive tool 800 is made of such a material having a simple structure and being inexpensive.

Similar to the display member 700 shown in FIG. 7A, the lid member 802 may be marked with characters, symbols, figures, or a combination thereof that call attention to erroneous operation. Specifically, as shown in FIG. 8A, the characters "operation prohibited" are written. In addition, the background of the lid member 802 may be colored in red, yellow, or the like in order to draw more attention. This allows workers to intuitively know that this valve should not be operated.

Another modification of the erroneous operation preventive tool 500 is shown in FIGS. 9A and 9B. 9A and 9B are explanatory views showing another example of the configuration of the erroneous operation prevention tool in the erroneous operation prevention method according to the embodiment of the present invention. 9B shows a state in which the erroneous operation preventive tool 900 of FIG. 9A is turned upside down with respect to FIG. 9A.

In FIGS. 9A and 9B, the erroneous operation preventive tool 900 has a cylindrical shape and has an opening 901. More specifically, the erroneous operation preventive tool 900 has a shape like a so-called "PET bottle lid". It is desirable that the erroneous operation preventive tool 900 is made of such a material having a simple structure and being inexpensive.

As shown in FIG. 9A, the erroneous operation preventive tool 900 is fitted into the slow leak valve 202 so as to completely cover the slow leak valve 202 with the opening 901 facing down. Therefore, if the shape of the opening 901 and the cylindrical shape of the operating portion of the slow leak valve 202 are substantially the same, and the size of the opening 901 is slightly larger than the cylindrical shape of the operating portion of the slow leak valve 202. Good.

Similar to the display member 700 shown in FIG. 7A and the lid member 802 shown in FIG. 8A, characters, symbols, figures, or a combination thereof that call attention to erroneous operation are written on the upper surface of the erroneous operation preventive tool 900. be able to. Specifically, as shown in FIG. 9A, the characters "operation prohibited" are written. In addition, the background of the upper surface of the erroneous operation preventive tool 900 may be colored in red, yellow, or the like in order to draw more attention. This allows workers to intuitively know that this valve should not be operated.

In this way, the erroneous operation prevention tool 900 completely covers the slow leak valve 202, so that the operator can more reliably prevent the erroneous operation of the valve. Further, since it is not necessary to insert the erroneous operation prevention tool 900 into the hole 400, the hole 400 of the slow leak valve 202 is not damaged.

As described above, the erroneous operation prevention method of the embodiment according to the present invention is to insert the operation member into the hole 400 for operation and rotate the operation member around the insertion direction of the operation member. Slow leak of the erroneous operation prevention tools 500 and 800, which is an erroneous operation prevention method for preventing an erroneous operation in the slow leak valve 202 (operation unit) operated by the above, and is not operated even if it is inserted into the hole 400 and rotated. Since it is inserted into the hole 400 when the valve 202 is not operated, it is possible to more reliably prevent the operator from making an erroneous operation.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, since the length of the erroneous operation prevention tool 500 in the insertion direction into the hole portion 400 is longer than the depth of the hole portion 400, the hole portion of the erroneous operation prevention tool 500 Since the portion protruding from the 400 can be pinched, the erroneous operation prevention tool 500 can be easily attached and detached.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, the hole portion 400 has a polygonal (hexagonal) cross section orthogonal to the insertion direction of the operation member, and the erroneous operation prevention tool 500 has the hole portion 400. Since the cross section orthogonal to the insertion direction into the hole 400 has a different shape (circular shape, etc.) from that of the hole 400, the erroneous operation preventive tool 500 inserted into the hole 400 slips in the hole 400 without being caught. Even if the malfunction prevention tool 500 rotates, the valve operation does not have to be performed.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, since the erroneous operation prevention tool 500 is made of a material having an elastic force, a frictional force is generated between the erroneous operation prevention tool 500 and the hole portion 400, and the hole portion 400 It is possible to prevent the erroneous operation preventive tool 500 inserted in the hole 400 from being inadvertently dropped from the hole 400. Further, the elastic force of the erroneous operation preventive tool 500 does not damage the inside of the hole 400.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, the erroneous operation prevention tool 500 is provided with a display member 700 at one end of the side where the erroneous operation prevention tool 500 is not inserted, so that the operator can call attention to the erroneous operation. It can be more intuitively understood that the operation unit (slow leak valve 202) related to the hole 400 should not be operated.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, the erroneous operation prevention tool 800 (insertion member 801) covers the operation portion (slow leak valve 202) at one end of the side not inserted into the hole portion 400. Since the lid member 802 is provided, it is possible to prevent the operator from erroneously operating this valve, which should not be operated.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, since the lid member 802 is integrally formed with the erroneous operation preventive tool 800 (insertion member 801), the trouble of assembling the erroneous operation preventive tool 800 can be saved. Can be done.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, since a display calling attention to the erroneous operation is displayed on the surface of the lid member 802, it is possible to more reliably prevent the erroneous operation by the operator.

Further, in the method for preventing erroneous operation according to the embodiment of the present invention, the operation member is inserted into the hole 400 for operation, and the operation member is rotated around the insertion direction of the operation member. This is an erroneous operation prevention method for preventing erroneous operation in the operation unit. Since the erroneous operation prevention tool 900 is attached so as to cover the slow leak valve 202 (operation unit) when no operation is performed, the erroneous operation prevention tool 900 is thrown. The leak valve 202 is completely covered to prevent the operator from making an erroneous operation, and since the erroneous operation preventive tool is not inserted directly into the hole 400, the hole 400 of the slow leak valve 202 can not be hurt.

Further, in the erroneous operation prevention method of the embodiment according to the present invention, since a display calling attention to the erroneous operation is displayed on the surface of the erroneous operation preventive tool 900, it is possible to more reliably prevent the erroneous operation by the operator.

As described above, the erroneous operation prevention method according to the present invention is an operation unit that operates by inserting the operation member into the hole for operation and rotating the operation member around the insertion direction of the operation member. This is an erroneous operation prevention method for preventing erroneous operations in the above, and is particularly suitable for an erroneous operation prevention method capable of reliably preventing erroneous operations by using a jig having a simple structure and being inexpensive.

100 Hydraulic operation housing 101 Valve operation part 201 Manual pressure drop valve 202 Slow leak valve 300, 400 Hole part 500, 800, 900 Misoperation prevention tool 700 Display member 801 Insertion member 802 Lid member 901 Opening

Claims (10)

An erroneous operation prevention method for preventing an erroneous operation in an operation unit that performs an operation by inserting an operation member into an operation hole and rotating the operation member around the insertion direction of the operation member.
An erroneous operation prevention method, characterized in that an erroneous operation preventive tool that is not operated even if it is inserted into the hole and rotated is inserted into the hole when the operation is not performed by the operation portion. The erroneous operation prevention method according to claim 1, wherein the erroneous operation prevention tool has a length in the insertion direction into the hole portion longer than the depth of the hole portion. The hole has a polygonal cross section perpendicular to the insertion direction of the operating member.
The erroneous operation prevention method according to claim 1 or 2, wherein the erroneous operation prevention tool has a cross section orthogonal to the insertion direction into the hole portion having a shape different from the shape of the hole portion. The erroneous operation prevention method according to any one of claims 1 to 3, wherein the erroneous operation prevention tool is made of a material having elastic force. The erroneous operation prevention tool according to any one of claims 1 to 4, wherein the erroneous operation prevention tool is provided with a display member that calls attention to erroneous operation at one end of the side that is not inserted into the hole. Method. The erroneous operation prevention method according to any one of claims 1 to 4, wherein the erroneous operation prevention tool is provided with a lid member covering the operation portion at one end of the side not inserted into the hole portion. The erroneous operation prevention method according to claim 6, wherein the lid member is integrally formed with the erroneous operation preventive tool. The method for preventing erroneous operation according to claim 6 or 7, wherein a display calling attention to erroneous operation is displayed on the surface of the lid member. An erroneous operation prevention method for preventing an erroneous operation in an operation unit that performs an operation by inserting an operation member into an operation hole and rotating the operation member around the insertion direction of the operation member.
An erroneous operation prevention method, characterized in that an erroneous operation preventive tool is attached so as to cover the operation portion when the operation is not performed. The erroneous operation prevention method according to claim 9, wherein a display calling attention to erroneous operation is displayed on the surface of the erroneous operation prevention tool.

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