JP2010196736A - Fixing means of sheet metal part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent installation in the same place of a control valve different in a setting condition even if component formation is the same. <P>SOLUTION: A control valve erroneous operation preventive device 10 has a valve body 11, a flow control valve 12 threadably attached to the valve body 11 by a screw mechanism and adjusted in the flow rate setting, an identification cover 13 for covering the flow control valve 12 from above and installed in the valve body 11, an identification mark 14 formed in the identification cover 13 and identifying the flow control valve 12, an identification pin 15 suitable for and inserted into the identification mark 14 and identifying the flow control valve 12, and a plug member 16 threadably attached to the valve body to install the identification cover 13 to the valve body 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to assembling or connecting machine parts, and more particularly to a means for fixing a sheet metal part when a cover made of sheet metal is coated on the machine part.

Conventionally, as a means for assembling or connecting machine parts, for example, hexagon socket head cap screws, hexagon head bolts, and cross-recessed pan head machine screws are generally used. In particular, for thin sheet metal, welding and fitting methods are used in addition to screws.For example, in hydraulic equipment that controls pressure and flow rate, after setting the pressure or flow rate, it cannot be reset by attaching a sheet metal cover. Think about the function to do.
When screws are used to fix the sheet metal, torque management is necessary in an important part, and a dedicated tool such as a torque wrench is necessary.

On the other hand, if a general tool such as a spanner, hex wrench or screwdriver is used, it can be disassembled and removed. However, since an operator or a third party can remove the sheet metal cover and reset the control valve pressure or flow rate, it is possible to perform the original function that is necessary to maintain the pressure or flow rate. Disappear.
Furthermore, when reset using a wrench, hexagon stick wrench, screwdriver, etc., it cannot be determined from the appearance whether it has been reset. As a result, mechanical parts continue to be used at the wrong pressure or flow rate, which can lead to quality degradation and failure.
Moreover, when welding is used, the number of work steps increases because a welding machine is required after product inspection. Furthermore, the quality of the product may be adversely affected by heat and impurities during welding, and internal parts may be deformed by the heat during welding, resulting in malfunctions and poor performance after shipment.
Furthermore, if the impurities during welding adhere to the mounting surface of the hydraulic device, the adhesion is deteriorated, and there is a possibility of oil leakage due to the gap or malfunction due to component deformation.

  Thus, it has a spreading part with a sheet metal strip oppositely provided with teeth arranged on the outside, which is adapted to be introduced into a previously drilled hole, in which the head is located There is a fastener provided with a fastening hole in which the attached pin is locked by approximately 1/4 rotation, and the pin has a biting rib extending in the circumferential direction on the opposite narrow side of the shank (for example, Patent Document 1). reference).

  Also, as a connecting device for connecting two structural components, the holding means in the first structural component and the second structural component are inserted into and connected to the holding means. Fixing means for holding the structural components together. The fixing means includes a plug member having a first end and a second end, and the first end includes an undercut head, which is inserted into the holding means and is held with the holding means. Engage. The plug member includes means for engaging with the second structural component (see, for example, Patent Document 2).

JP-A-8-210334 JP 2008-530479 A

However, since the fastener of Patent Document 1 has a relatively large number of components, the structure is complicated, and the fastener can be attached and detached. Therefore, the fastener is not suitable for fastening a component that cannot be reset.
Further, the connecting device of Patent Document 2 is not suitable for fastening parts that cannot be reset because the hole processing for mounting the connecting device is complicated and can be attached and detached.
The present invention has been made to solve the above-described problems. After setting the pressure and flow rate of the control valve, the control valve is covered with a sheet metal cover so that the control valve cannot be operated again, and the cover is mechanically removed. It is an object of the present invention to provide a fixing means for a sheet metal part which cannot be used.

The invention according to claim 1 for solving the above-mentioned problem is a control valve adjusted to a predetermined setting condition;
A valve body to which the control valve is attached;
An identification cover member that covers the control valve and is attached to the valve main body and provided with an identification portion that identifies the control valve;
A plug member that is screwed to the valve body and attaches the identification cover member to the valve body;
With
After the identification cover member is fastened to the valve body by the plug member, the head portion of the plug member is broken so that the identification cover member cannot be removed mechanically.

According to the present invention, the processing for mounting is the same as that of the bolt fixing means for both the sheet metal and the counterpart part. Further, the tightening torque may be controlled automatically by turning until the hexagonal head is threaded.
Therefore, when the hexagonal head of the plug member is threaded, it cannot be removed, and can be reliably fixed if used for identification of the identification cover member. Also, incorrect readjustment can be prevented.

  The present invention makes it impossible to remove the sheet metal part, and can be reliably fixed if it is used for identification of the identification cover member. Also, incorrect readjustment can be prevented.

It is a longitudinal cross-sectional view which shows schematic structure of the fixing means of the sheet metal component which concerns on embodiment of this invention. It is a left view of FIG. It is sectional drawing which shows the state by which the plug member was screwed by the valve body. It is a principal part enlarged view of the processing hole formed in the valve body. It is a top view of FIG. It is a perspective view of the fixing means of the sheet metal component which concerns on embodiment of this invention.

Embodiments of a fixing means for sheet metal parts according to the present invention will be given and described in detail with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing a schematic structure of a sheet metal part fixing means 10 according to an embodiment of the present invention.
The sheet metal component fixing means 10 includes a valve main body 11, a control valve screwed to the valve main body 11 by a screw mechanism, for example, a flow control valve 12 whose set flow rate has been adjusted, and the flow control valve 12 covered from above. An identification cover (identification cover member) 13 attached to the valve body 11, an identification mark (identification portion) 14 (see FIG. 5) formed on the identification cover 13 for identifying the flow control valve 12, and the identification mark 14 An identification pin (identification member) 15 (see FIG. 5) that is inserted to identify the flow control valve 12 and a plug that attaches the identification cover 15 to the valve body 11 and prevents the identification cover 15 from being mechanically removed. And a member 16 (see FIG. 5).

  The valve body 11 having a rectangular cross section has a lower surface 11a attached to the base 17 and an outlet 18 that communicates with a pressure supply source (not shown) and an outlet that supplies a set flow rate of hydraulic oil to a hydraulic device (not shown) by the flow control valve 12. 19 is provided, and the inlet 18 and the outlet 19 communicate with each other by a passage 20. Reference numeral 21 is a closing plug for closing the open end of the passage 20. The flow rate control valve 12 is adjusted to a required set flow rate and is screwed to the valve body 11. In this case, the configuration of the flow rate control valve 12 is well known and is not the gist of the present invention, so a detailed description is omitted.

FIG. 3 is a schematic structural diagram showing a state in which the plug member 16 is screwed to the valve body 11. The plug member 16 includes a threaded portion 29 formed at both ends of the main body 28, a flange 30 adjacent to the threaded portion 29, a groove 31, and a hexagonal head 32. However, Japanese Utility Model Publication No. 5-34369. Therefore, only the main parts are denoted by reference numerals, and detailed description thereof is omitted.
FIG. 4 is a structural diagram showing a state in which the plug member 16 is screwed to the valve body 11. As shown in FIG. 4, a parallel screw hole 26 and a 60 ° tapered portion 27 at the edge of the processed hole 25 are processed in the processed hole 25 of the valve body 11. In addition, the magnitude | size of the taper degree of the taper part 27 and the collar part 30 (refer FIG. 3) is arbitrary.
When the identification cover 13 is attached to the valve body 13 by the plug member 16, the hexagonal head 32 of the plug member 16 is cut out by a tool so that the identification cover 13 cannot be easily removed. Thereby, the change of the set flow rate of the flow rate control valve 12 for which the flow rate has been set is disabled. Therefore, the initial set flow rate can be ensured.

  As shown in FIGS. 1 and 5, the identification cover 13 has a rectangular cross-section and is shielded at the top so as to cover the flow control valve 12, and the bottom is opened to cover the two outer surfaces of the valve body 11. The plug member 16 is attached from at least two directions. In this case, the other two surfaces of the identification cover 13 that are not attached to the plug member 16 are placed on the upper surface 11 b of the valve body 11.

  As shown in FIGS. 2 and 5, the identification mark 14 is formed in a semicircular opening in an identification plate 23 provided below the identification cover 13, and the position and flow rate where the identification mark 14 is formed. The control valve 12 corresponds. That is, the flow control valve 12 whose flow rate is set can be identified by the position of the identification mark 14.

The sheet metal part fixing means 10 according to the embodiment of the present invention is basically configured as described above, and the order in which the sheet metal part fixing means 10 is assembled will be described.
A flow control valve 12 adjusted to a desired set flow rate is screwed to the valve body 11. Next, the identification cover 13 having the identification plate 23 on which the identification mark 14 for identifying the flow control valve 12 is formed is selected. The identification cover 13 is covered with the flow control valve 12 and attached to the valve body 11 with the plug member 16. The hexagonal head 32 of the plug member 16 is cut out with a tool (not shown). For this reason, the flow control valve 12 and the identification cover 13 cannot be easily attached and detached from the valve body 11.
In the control valve erroneous operation preventing apparatus 10 according to the embodiment of the present invention, the flow control valve has been described, but the present invention can also be applied to other control valves such as a pressure control valve and a manual direction control valve.

DESCRIPTION OF SYMBOLS 10 Fixing means of sheet metal part 11 Valve body 12 Control valve 13 Identification cover 14 Identification mark 15 Identification pin 16 Plug member 17 Base 18 Inlet 19 Outlet 20 Passage 22 Processing hole 23 Parallel screw hole 24 Processing disposal hole 25 Taper part 26 Main body 27 Screw Part 28 collar part 29 groove 30 hexagon head

Claims (1)

A control valve adjusted to a predetermined setting condition;
A valve body to which the control valve is attached;
An identification cover member that covers the control valve and is attached to the valve main body and provided with an identification portion that identifies the control valve;
A plug member that is screwed to the valve body and attaches the identification cover member to the valve body;
With
A fixing means for a sheet metal part, wherein after the identification cover member is fastened to the valve body by the plug member, the head portion of the plug member is broken so that the identification cover member cannot be removed mechanically.

Images