WO2014203378A1 - Filter, and working vehicle provided with filter - Google Patents

Abstract

A filter (20) provided to a working vehicle is provided with: an outer casing (21); a metal end member (22); and an identification device (30). The identification device (30) is provided with at least one identification element (35), and at least one antenna (36). The end member (22) is provided with: a grove part (26) which is open at a surface; and a first protruded part (2261) which is located at an outer peripheral side of the grove part (26), and which is most protruded in a first direction orthogonal to the aforementioned surface. The position of the antenna (36) of the identification device (30) in the first direction is further towards a side in the first direction than the first protruded part (2261).

Description

Filters and work vehicles with filters

The present invention relates to a filter equipped with an identification component such as an IC tag and a work vehicle including the filter.

Known work vehicles include various construction machines such as hydraulic excavators and wheel loaders, and transport vehicles such as dump trucks. In construction machines, IC chips are embedded in replacement parts such as engine oil elements, return filters, pilot filters, air conditioner filters, etc., and the information stored in the IC chips is read by a reader / writer and the filter installation timing is used as the construction machine controller. A technique for storing and displaying the next replacement time of the filter on a monitor is known (see Patent Document 1).
By the way, as a method of attaching an IC chip to a product, there is a method of attaching an RFID tag (IC tag) to a groove of an end plate portion of an air filter element of an automobile (see Patent Document 2).
The air filter element of Patent Document 2 includes a cylindrical tubular reinforcement body housed in a casing, and an end plate portion that holds an internal filter body at both ends of the tubular reinforcement body to form an air flow path. Consists of. And the RFID tag is attached to the groove | channel formed in the end plate part made from urethane foam.

JP 2005-273196 A JP 2008-83792 A

By the way, although the work vehicle equipped with the filter and filter of patent document 1 is described about the filter which attached the IC chip to the filter, if the IC chip is attached to any place of the filter, the reader / writer (read / write device) or the reader It is not described whether communication between the (reading device) and the IC tag can be improved. In particular, when the filter is made of metal, or when the filter holding part for attaching the filter is also made of metal, no solution has been made to improve the communication.

In addition, the air filter element of Patent Document 2 has an RFID tag attached to a resin end plate portion in order to avoid the influence of a metal material such as a cylindrical reinforcement. For this reason, the applicable filter is limited to the one using a resin end plate such as an air filter, and cannot be applied to a filter using a metal end plate such as an oil filter or a fuel filter. As described above, a filter capable of satisfactorily communicating with a reader / writer (read / write device) or a reader (reader) by attaching an IC tag to a metal filter is desired.

An object of the present invention is to provide a filter in which an identification device capable of communicating with a reader / writer or a reader is attached to a metal end face, and a work vehicle including the filter.

The filter of the present invention is a filter mounted on a work vehicle, and includes an exterior case, a metal end member attached to an opening end portion of the exterior case, and an identification device attached to the end member. The identification device includes at least one identification element and at least one antenna, and the end member includes a groove opening on a surface of the end member, and an outer peripheral side of the groove portion. A first protrusion that protrudes most in a first direction orthogonal to the surface, and the position of the antenna of the identification device in the first direction is closer to the first direction than the first protrusion. It is characterized by.

According to the present invention, the groove and the first protrusion are provided on the surface of the end member, and the first protrusion is protruded most in the first direction on the outer peripheral side of the groove. Since the antenna of the identification device is located at a position higher than the first projecting portion, when the filter end member is attached to the work vehicle, it is formed between the filter mounting portion and the first projecting portion of the work vehicle. The antenna of the identification device can be exposed through the gap. Therefore, even if the end member is made of metal, the antenna of the identification device can communicate through the gap, so that the inconvenience of being unable to communicate can be avoided.

In the filter according to the aspect of the invention, it is preferable that the identification device includes a protection unit made of an insulating material in the first direction of the antenna.

According to the present invention, when the end member of the filter is attached to the work vehicle, the antenna constituting the identification device can be reliably prevented from coming into direct contact with the attachment portion of the filter in the work vehicle. Therefore, even if the end member is made of metal, it is possible to reliably avoid the inconvenience that the antenna of the identification device cannot communicate with the metal part.

In the filter of the present invention, the filter has a second protrusion that protrudes in the first direction on the inner peripheral side of the groove, and the position of the second protrusion in the first direction is higher than that of the first protrusion. It is desirable that the second projecting portion be on the first direction side, and the position of the second protrusion in the first direction is on the first direction side with respect to the antenna.

According to the present invention, among the antenna, the first protrusion, and the second protrusion of the identification device, the second protrusion is located closest to the first direction. For this reason, when the end member of the filter is attached to the work vehicle, the second projecting portion first comes into contact with the attachment portion of the filter in the work vehicle. Therefore, it can prevent that an identification device contacts a work vehicle by arrange | positioning in the position where the protrusion surface of an identification device does not protrude rather than a 2nd protrusion part. For this reason, even if the attachment part of the filter in a work vehicle is metal, it can prevent that the antenna of an identification device contacts the attachment part made of metal. Therefore, it is possible to avoid the inconvenience that the antenna cannot communicate with the metal part.
Further, the protruding surface of the identification device is set to be equal to or more than the position of the first protruding portion that protrudes most on the outer peripheral side of the groove portion. That is, the protruding surface of the identification device and the position of the first protruding portion coincide with each other, or the protruding surface of the identification device is protruded from the first protruding portion. For this reason, it can prevent that an identification device is arranged behind the said 1st protrusion part. Therefore, a part of the antenna of the identification device can be arranged facing the gap between the first protrusion and the filter mounting portion of the work vehicle. Therefore, even if the end member is made of metal, the antenna of the identification device can communicate through the gap, so that it is possible to reliably avoid the inconvenience of being unable to communicate.

In addition, it is preferable that the first projecting portion is continuously provided on the outer peripheral wall portion of the groove portion, and the second projecting portion is continuously provided on the inner peripheral wall portion of the groove portion.
According to this, the 1st protrusion part and the 2nd protrusion part are provided in the wall part of the said groove part continuously. That is, the first projecting portion is provided continuously to the tip portion in the first direction of the wall portion on the outer peripheral side (the upper end portion if the first direction is the vertical direction), and the tip in the first direction of the wall portion on the inner peripheral side. A second protruding portion is provided continuously to the portion (the upper end portion if the first direction is the vertical direction). Therefore, when the groove is machined, the first protrusion and the second protrusion can be simultaneously processed and molded. Therefore, the shape of the step member can be simplified and the processing cost can be reduced as compared with the case where the first protrusion and the second protrusion are formed at a position different from the groove.

In the filter of the present invention, it is preferable that the end member includes a screw portion for attachment to the work vehicle, and the first direction is a screw shaft direction of the screw portion.

According to the present invention, the filter can be easily attached by screwing the screw portion of the filter into the attachment portion of the filter of the work vehicle. In addition, since the first direction is set to the screw axis direction, it is possible to reliably prevent the antenna of the identification device from coming into contact with the metal mounting portion when the filter is screwed. Therefore, it is possible to avoid the inconvenience that the antenna cannot communicate with the metal part.
In addition, since the identification device is attached to the groove, it is not necessary to attach it to the outer peripheral surface of the filter. When the identification device is attached to the outer peripheral surface of the filter, it is necessary to work with care so as not to damage the identification device, and the filter attachment operation becomes complicated. On the other hand, if the identification device is attached to the groove, the identification device is arranged at a position that does not affect the attachment work, so that the work efficiency when attaching the filter can be improved.

In the filter of the present invention, the identification device may include a first identification component having one identification element, one antenna, and a second identification component having one identification element and one antenna. desirable.

According to the present invention, since the first identification component and the second identification component are provided, each identification component can be arranged independently, the degree of freedom of the arrangement position of the antenna of each identification component is increased, and the communication performance can be improved. .

In the filter according to the aspect of the invention, it is preferable that the antenna is disposed at a center position in the width direction of the groove.
According to the present invention, the antenna can be disposed at an intermediate position between the side wall portions, and can be disposed at a position farthest from each side wall portion provided on the metal end member, so that deterioration in communication performance can be prevented.

In the filter of the present invention, it is preferable that a reading device mounted on a filter holding part mounted on the work vehicle and mounted on the work vehicle reads information of the identification element.

According to the present invention, the filter is mounted on a filter holding component mounted on a work vehicle. Then, at least one reading device mounted on the work vehicle can read the information of the identification element. For this reason, the information on the filter mounted on the filter holding component can be grasped by the computer of the work vehicle and the management server that can communicate with the work vehicle. For this reason, the person in charge of service can grasp information such as whether the installed filter is a genuine product or the period of use, and can perform appropriate maintenance work.

In the filter of the present invention, the filter holding part is made of metal, and when the filter is mounted on the filter holding part, the first protrusion forms a gap without contacting the filter holding part, It is desirable that an end of the antenna in the first direction is located in the gap.

According to the present invention, the identification device and the first protrusion do not contact the metal filter holding component. For this reason, since the identification device does not come into contact with the metal filter holding component, it is possible to reliably prevent the communication performance from being lowered due to the antenna of the identification device coming into contact with the filter holding component. It can be secured.
In addition, since a gap can be formed between the first protrusion and the filter holding component, the identification device can transmit and receive radio waves through the gap, and communication performance can be ensured in this respect as well.

The filter of the present invention is a filter mounted on a work vehicle, and includes an exterior case, a metal end member attached to an opening end portion of the exterior case, and an identification device attached to the end member. The end member is continuously provided on a screw portion for attachment to the work vehicle, a groove portion opened on a surface of the end member, and a wall portion on an outer peripheral side of the groove portion, A first protrusion that protrudes most in a first direction orthogonal to the surface on the outer peripheral side of the groove, and a wall on the inner peripheral side of the groove are provided continuously, and the first direction on the inner peripheral side of the groove The first protrusion is a screw shaft direction of the screw part, the second protrusion protrudes in the first direction from the first protrusion, The identification device has one identification element, one antenna, and resin foam The identification element and the cover body that sandwiches the antenna, the identification element, the identification element, the antenna, and the resin foam, the identification element and the antenna. A second discriminating part having a cover body to be sandwiched, wherein the antenna is disposed at a center position in the width direction of the groove, and the position of the antenna in the first direction is greater than that of the first protrusion. The first identification component and the second identification component are positioned in the first direction from the respective antennas, on the first direction side and on the opposite side of the first direction from the second protrusion. And having a protective portion made of an insulating material.
The work vehicle of the present invention includes the filter.
In each of these inventions, the identification device provided on the metal end face of the filter can stably communicate with the reader / writer or the reader.

The perspective view which shows the hydraulic excavator which is an example of the working vehicle in which the filter of embodiment of this invention is utilized. Schematic which shows the arrangement | positioning state of the filter and reader / writer in the machine room of a hydraulic excavator. The block diagram which shows schematic structure of a components management system. The perspective view which shows a filter and a filter head. The side view which shows a filter and a filter head. The top view which shows the retainer of a filter. AA line sectional view in FIG. Sectional drawing which shows the state which attached the filter to the filter head. The perspective view which shows the IC tag for filters. The figure which shows the IC tag for filters. The exploded view which shows the layer structure of the IC tag for filters. The figure which shows the other IC tag for filters. Sectional drawing which shows the state which attached the filter which has another IC tag to the filter head. The top view which shows the retainer to which the filter from which the length dimension of a structure part differs was attached. The top view which shows the retainer to which the filter from which the length dimension of a structure part differs was attached. The top view which shows the arrangement | positioning state of the IC tag of a comparative example. The top view which shows the arrangement | positioning state of the IC tag of embodiment. The graph which shows the relationship between the rotation angle of the filter in the experiment of embodiment by an anechoic box, and received signal strength. The graph which shows the relationship between the rotation angle of the filter and received signal strength in the experiment of the comparative example in an anechoic box.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Description of the entire hydraulic excavator]
FIG. 1 is a perspective view of a hydraulic excavator 1 which is a construction machine as one of work vehicles using the filter of the present invention. In the present embodiment, the excavator 1 includes a vehicle main body 2 and a work implement 3. The vehicle body 2 includes a traveling device 4 and an upper swing body 5.

In the present embodiment, the hydraulic excavator 1 uses, for example, an internal combustion engine such as a diesel engine as a power generation device, but the hydraulic excavator 1 is not limited to such a configuration. The hydraulic excavator 1 may include, for example, a so-called hybrid power generation device in which an internal combustion engine, a generator motor, and a power storage device are combined.

As shown in FIG. 1, the upper swing body 5 includes a machine room 5A, a cab 5B, and a counterweight 5C.
The machine room 5 </ b> A is disposed on one end side of the upper swing body 5. Inside the machine room 5A, a power generation device such as an engine (not shown) and a device such as a hydraulic pump are accommodated. The machine room 5A is divided into a pump room and an engine room by a partition wall. The pump room is arranged on the right side and the engine room is arranged on the left side.
The cab 5B is placed on the other end side of the upper swing body 5. That is, the cab 5B is disposed on the side opposite to the side on which the machine room 5A is disposed.
The counterweight 5C is provided at the rearmost part of the upper swing body 5. The counterweight 5C is provided for weight balance with the work machine 3, and is filled with heavy objects. In other words, the machine room 5A is disposed between the cab 5B and the counterweight 5C.

In the upper swing body 5, the side on which the work machine 3 and the operator cab 5B are arranged is the front, and the side on which the machine room 5A is arranged is the rear. The left side toward the front is the left of the upper swing body 5, and the right side toward the front is the right of the upper swing body 5. Further, the excavator 1 or the vehicle main body 2 is on the lower side of the traveling device 4 with respect to the upper swing body 5, and the upper side of the upper swing body 5 with respect to the traveling device 4. When the excavator 1 is installed on a horizontal plane, the lower side is the vertical direction, that is, the gravity direction side, and the upper side is the opposite side of the vertical direction.

The traveling device 4 has crawler belts 4a and 4b. The traveling device 4 is driven by a hydraulic motor (not shown), and the crawler belts 4a and 4b are rotated so that the hydraulic excavator 1 travels or turns. The work machine 3 is attached to the side of the cab 5B of the upper swing body 5.

The work machine 3 includes a boom 6, an arm 7, a bucket 8, a boom cylinder 6A, an arm cylinder 7A, and a bucket cylinder 8A. The base end portion of the boom 6 is swingably attached to the front portion of the vehicle main body 2 via a boom pin 6B. A base end portion of the arm 7 is swingably attached to a distal end portion of the boom 6 via an arm pin 7B. A bucket 8 is swingably attached to the tip of the arm 7 via a bucket pin 8B.

[Description of machine room]
FIG. 2 shows a state where a door (not shown) is opened from the right side of the upper swing body 5 and the pump room is visible.
In the machine room 5A, an engine and a hydraulic pump 12 (not shown) are accommodated. The engine is mechanically connected to the hydraulic pump 12, and the hydraulic pump 12 is driven by the driving of the engine to discharge hydraulic oil to hydraulic equipment such as the boom cylinder 6A. For example, as shown in FIG. 2, a hydraulic pump 12 is installed and a bracket 11A is attached to the pump room of the machine room 5A. A filter head 13A is attached to the bracket 11A, and a hose 14A is attached to the filter head 13A.
A filter head 13B is attached to the pump room of the machine room 5A via a bracket 11B, and a fuel hose 14B is attached to the filter head 13B.

[Type of filter head and filter in machine room]
As shown in FIG. 2, a filter 20A is attached to the filter head 13A. This filter 20A is an engine oil filter, and dust contained in the oil flowing through the hose 14A is removed by the filter 20A.

Here, the flow of engine oil will be briefly described.
An unillustrated engine and an engine oil filter (filter 20A) are connected via a hose 14A. Engine oil staying in the engine is pumped up by a pump (not shown) and sent to the filter 20A. The engine oil that has passed through the filter 20A is returned to the engine again.

A filter 20B is attached to the filter head 13B. This filter is a fuel pre-filter, and dust contained in the fuel that has flowed to the fuel hose 14B is removed by the filter 20B. The fuel prefilter is not essential for the hydraulic excavator 1 and may be the hydraulic excavator 1 that does not include the fuel prefilter.
Furthermore, a fuel main filter 20C (not shown in FIG. 2) is attached to the filter head 13C in the engine room of the machine room 5A.

Here, the fuel flow will be briefly described.
A fuel tank (not shown) and a fuel prefilter (filter 20B) are connected via a hose 14B. First, fuel is sent from a fuel tank (not shown) to the filter 20B. Thereafter, the fuel is sent to the fuel main filter (filter 20C), and the fuel that has passed through the filter 20C is sent to a fuel injection device (not shown). The surplus fuel in the fuel injection device is returned to the fuel tank via a hose (not shown).

Although details of the filter heads 13A, 13B, and 13C will be described later, the filter heads 13A, 13B, and 13C have shapes as shown in FIG. 4 and are manufactured by machining a metal casting member. .
Accordingly, the filter heads 13A, 13B, and 13C are filter holding parts for holding and fixing the filters 20A, 20B, and 20C.

The filters 20A, 20B, and 20C attached to the filter heads 13A, 13B, and 13C are components that need to be periodically replaced because the internal filter members become clogged by use. The arrival of the regular replacement time is determined by, for example, the operation time indicated by the SMR (service meter) that measures the operation time of the engine of the hydraulic excavator 1.

[Description of identification device and reader / writer]
Identification devices 30A, 30B, and 30C each having at least two IC tags are attached to the filters 20A, 20B, and 20C.
In the machine room 5 </ b> A, a reader / writer (read / write device) 15 for reading component information stored in the identification devices 30 </ b> A, 30 </ b> B, 30 </ b> C (hereinafter, the component information may be referred to as data as appropriate) is provided via a bracket 16. Attached. In the present embodiment, the case where the reader / writer (read / write device) 15 is used will be described. However, even when the reader (reader) having a function of only reading the information of the identification devices 30A, 30B, and 30C is used. The present invention is applicable. Furthermore, the present invention can be applied even when a writer (writing device) having a function of only writing information to the identification devices 30A, 30B, and 30C is used.

[Work vehicle parts monitoring system]
Next, a component monitoring system using information of the identification devices 30A, 30B, and 30C of the filters 20A, 20B, and 20C will be described with reference to FIG. In addition, although demonstrated below as an example of the components monitoring system with respect to the hydraulic shovel 1, this invention is applicable also to the construction machine as another work vehicle.
The component monitoring system includes a management center 100, a hydraulic excavator 1, and a communication network 110 that transmits and receives component information between the management center 100 and a plurality of hydraulic excavators 1.
The management center 100 centrally manages various types of information including part information of a plurality of work vehicles. The management server 101 of the management center 100 includes a large-capacity storage device configured by a hard disk or the like, and includes a display device 102 configured by a liquid crystal monitor or the like, a communication device 103 capable of wireless communication or wired communication, and the like. Mutual information communication is possible. The management server 101 manages and stores component information of the excavator 1. Here, examples of the component include filters such as an engine oil filter, a fuel prefilter, and a fuel main filter. The part information includes a part number for identifying the part type, a manufacturing date, a serial number (manufacturing number) for identifying each part among parts having the same part number, a supplier code indicating the part manufacturer, and a package tag to be described later. 35 serial numbers and the like are stored.

The communication network 110 is a network for data communication by wireless communication, and a mobile phone network or a satellite communication network can be used.
A hydraulic excavator 1 that is a work vehicle is provided with a communication controller 200 having a communication terminal 202 connected to an antenna 201 for communication via a communication network 110. The hydraulic excavator 1 is provided with an engine controller 211, a pump controller 212, a monitor device 213, and the reader / writer 15. The engine controller 211 is a controller that adjusts a fuel supply amount to an engine (not shown) and controls engine output. The pump controller 212 is a controller that controls the pump output or the motor output by adjusting the swash plate angle of a pump or a hydraulic motor (not shown). The monitor device 213 includes a display function such as a display of the remaining amount of fuel and a display of failure information of the excavator 1 and an input function for performing operation settings of the excavator 1.

[Explanation of reader / writer]
In the present embodiment, two reader / writers 15 </ b> A and 15 </ b> B are provided as the reader / writer 15. There may be only one reader / writer 15 or two or more reader / writers 15. Since the communication state between the reader / writer 15 and each identification device 30A, 30B, 30C is determined by the relative positional relationship, if a plurality of reader / writers 15 are provided, information stored in the IC tag with a higher probability (for example, The above component information) can be read. The devices such as the engine controller 211, the pump controller 212, the monitor device 213, and the reader / writer 15 and the communication controller 200 are connected to each other via a vehicle body network 210 so that data communication can be performed.

The reader / writer 15A is provided in the pump room and communicates with the identification devices 30A and 30B of the filters 20A and 20B. The reader / writer 15B is provided in the engine room and communicates with the identification device 30C of the filter 20C.
The reader / writer 15 (15A, 15B) of the present embodiment transmits / receives to / from an IC tag included in the identification devices 30A, 30B, 30C using, for example, 900 MHz UHF band radio waves. Since radio waves in this frequency band can communicate with the identification devices 30A, 30B, and 30C separated by about 1 m, they can be used in the engine room and pump room of the excavator 1.

[Description of communication controller]
The communication controller 200 has a timer function and operates the reader / writer 15 periodically such as once a day, and operates the reader / writer 15 according to the operation instructions of the administrator of the management center 100 and the operator of the excavator 1. Let That is, the administrator transmits a predetermined activation signal from the management center 100 to the hydraulic excavator 1 via the communication network 110, and the communication controller 200 activates the reader / writer 15 when receiving the activation signal. May be. Further, the reader / writer 15 may be activated when the operator starts an engine (not shown) of the excavator 1 by operating a key switch (not shown). Alternatively, when the operator of the excavator 1 operates an operation button for generating a predetermined activation signal, the communication controller 200 may activate the reader / writer 15 when receiving the activation signal. . Further, the filter heads 13A, 13B, and 13C may be provided with sensors that detect the attachment / detachment of the filters 20A, 20B, and 20C, and the reader / writer 15 may be operated according to the sensor output.

The reader / writer 15 (15A, 15B) reads the component information of the identification device 30 (30A, 30B, 30C) or writes new data to the identification device 30. If the communication controller 200 compares the new data with the old data and determines that the old data has been updated to the new data, the communication controller 200 deletes the old data and stores only the new data. Further, this comparison process may be performed by an information processing apparatus (not shown) of the management server 101.
The communication controller 200 reads the data read from the identification device 30, for example, data indicating the time when the reader / writer 15 is operated, data indicating the time when the reader / writer 15 reads the data of the identification device 30, and data of the identification device 30. Is transmitted to the management server 101 of the management center 100 via the communication terminal 202, the antenna 201, and the communication network 110 together with any one or a plurality of data indicating the time of transmission to the management server 101. In addition, the other controller, for example, the pump controller 212 or the reader / writer 15, may have the function of the communication controller 200 as described above.

According to the above component monitoring system, the management server 101 can grasp the mounting timing of the filters 20A, 20B, and 20C by reading the information of the identification devices 30A, 30B, and 30C. That is, if the data of the identification device 30 received by the management server 101 and the data indicating the time associated with the data are different from the data received in the past, new filters 20A, 20B, and 20C are attached. And when it was installed. When a counterfeit filter is attached, it is assumed that the regular identification device 30 is not attached to the filter or the identification device 30 itself is not attached. Therefore, when a counterfeit filter is attached, the management server 101 cannot acquire data. As a result, the management server 101 can estimate the possibility that the counterfeit product filter is attached to the excavator 1. The filters 20A, 20B, and 20C do not necessarily have the same mounting time, but the communication controller 200 can grasp the mounting time for each filter by performing the process of comparing new data and old data as described above. Therefore, the management server 101 can grasp the usage time of each of the filters 20A, 20B, and 20C in the work vehicle in conjunction with an SMR (service meter) (not shown) that records the cumulative operation time in the work vehicle. Can be managed easily and reliably.
As described above, it is very important to reliably acquire the information of the identification device 30 by the reader / writer 15 in constructing the component monitoring system as described above.

[Description of filter head and filter configuration]
Next, the configuration of the filter head 13 and the filter 20 attached to the filter head 13 will be described with reference to FIGS. 4 to 6 exemplify the filter head 13A and the filter 20A, the other filter heads 13B and 13C and the filters 20B and 20C have the same basic configuration. In the following description, the filter heads 13A, 13B, and 13C may be collectively referred to as the filter head 13. The filters 20A, 20B, and 20C may be collectively referred to as the filter 20. 4 and 5 indicate a first direction in which the filter 20 is screwed into the filter head 13, and is a vertically upward direction in the present embodiment.

[Description of filter head]
As shown in FIGS. 4 and 5, the filter head 13A is made of, for example, a metal casting such as aluminum, and has four screw portions 131 used for mounting on a bracket (not shown) and a pipe (hose) for supplying fuel. ) And a discharge port 140 to which a pipe (hose) for discharging the fuel filtered by the fuel filter 20C is mounted.
The filter head 13A communicates with the suction port 132 and opens on a lower surface of the filter head 13A (a surface facing a retainer 22 described later), and communicates with the communication hole 133 on the upper surface of the filter head 13A. An opening 134 that opens, a communication hole 139 that communicates with the discharge port 140, and an opening 135 that communicates with the communication hole 139 and opens on the upper surface of the filter head 13 </ b> A are formed. The openings 134 and 135 are formed with female screws, and are closed by screwed screw plugs 136 and 137.
The filter head 13 </ b> A is provided with a male screw portion 138, and the filter 20 can be held by screwing the female screw portion 223 of the filter 20 into the male screw portion 138. The communication hole 139 passes through the central axis of the male screw portion 138 and opens at the lower end surface of the male screw portion 138. Note that the male screw portion 138 may be configured as a separate component from the filter head 13A.
Then, the screw portion 131, the suction port 132, the discharge port 140, the openings 134 and 135, the male screw portion 138 such as screw holes and a flat portion (not shown) are formed by machining.

[Description of filter]
As shown in FIG. 4, the filter 20 </ b> A includes a cylindrical outer case 21 and a retainer 22 that is an end member attached to the opening end of the outer case 21. In the present embodiment, the filter 20A is attached so that the screw shaft when screwed into the filter head 13A is along the vertical direction and the retainer 22 is on the top.
The outer case 21 is formed by deep drawing by pressing a steel plate and is formed in a bottomed cylindrical shape. Note that the fuel prefilter (filter 20B) has a cylindrical shape with no bottom in the outer case, although not shown. A receiving part is attached to the bottom part, so that the water extracted from the fuel is stored in the receiving part.

[Retainer description]
As shown in FIGS. 4 and 7, the retainer 22 includes an end plate 221 and a cover plate 222. The end plate 221 and the cover plate 222 are integrated by welding or the like. The retainer 22 is disposed on the opening side of the outer case 21 and integrated with the outer case 21 by caulking.
The end plate 221 is configured by pressing a steel plate such as a cold-rolled steel plate, and has a female screw portion 223 formed through the central shaft portion of the filter 20 and a plurality of openings around the female screw portion 223. Through-holes 224. Before the end plate 221 is pressed, the through-hole 224 is drilled by punch press or the like, and the female screw portion 223 is formed with a screw groove by machining after the end plate 221 is pressed. In the present embodiment, the female screw portion 223 is a screw portion for attachment to the work vehicle as described above. The screw portion is not limited to the female screw portion 223 but may be a male screw portion. In this case, an internal thread portion may be provided on the filter head 13 (13A, 13B, 13C).

[Description of retainer groove]
As shown in FIGS. 6 and 7, the cover plate 222 includes two concentric grooves 226 and 227 centering on the central axis of the retainer 22, that is, the screw axis O of the female screw part 223. Here, the groove portion 226 is a first groove portion, and the groove portion 227 is a second groove portion.
The first groove 226 is formed on the outer peripheral side with respect to the second groove 227. These groove portions 226 and 227 are surfaces perpendicular to the axial direction of the female screw portion 223 that is the surface of the retainer 22, that is, the screw portion, and the direction in which the filter head 13 is disposed (the first direction shown in FIGS. 4 and 5). D1). As can be seen from FIG. 4, the first groove 226 and the second groove 227 are both continuously formed in a circular shape. The cross-sectional shape of the 1st groove part 226 is the same shape in the circular shape. The cross-sectional shape of the second groove portion 227 is also the same in the circular shape.

FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6 and is a cross-sectional view showing the filter retainer and the mounting structure of the IC tags 301 and 302.
As shown in FIG. 7, the first groove portion 226 is partitioned by two side wall portions 2261, 2262 and a bottom portion 2263. The second groove portion 227 is partitioned by two side wall portions 2271, 2272 and a bottom portion 2273.
A continuous portion curved toward the outer peripheral side of the retainer 22 is provided at the upper end of the side wall portion 2261. Further, it is bent downward from the continuous portion and is caulked and joined to the outer case 21. That is, the upper end (the tip portion on the first direction D1 side) of the side wall portion 2261 is the first projecting portion 231 constituting the continuous portion.
In addition, a continuous portion curved toward the inner peripheral side of the retainer 22 is provided at the upper end of the side wall portion 2262, and further curved downward from the continuous portion to continue to the side wall portion 2271. The upper ends (tip portions on the first direction D1 side) of the side wall portions 2262 and 2271 are second projecting portions 232 that constitute a continuous portion.

The first projecting portion 231 is a first direction D1 (the direction in which the filter head 13 is disposed) along the screw axis O perpendicular to the surface of the retainer 22 on the outer peripheral side of the first groove portion 226. FIG. , 5 in the direction of arrow D1).
The second protrusion 232 protrudes most in the first direction D1 on the inner peripheral side of the first groove 226.
And the 2nd protrusion part 232 protrudes in the 1st direction D1 side rather than the 1st protrusion part 231. FIG. That is, the second projecting portion 232 projects most in the first direction D1 in the entire retainer 22.
Here, when the protrusion dimension from the upper surface of the bottom part 2263 of the first groove 226 to the upper surface of the first protrusion part 231 is H11 and the protrusion dimension from the upper surface of the bottom part 2263 to the upper surface of the second protrusion part 232 is H12, H12 is larger than H11 (H12> H11).
Note that the second protrusion 232 that protrudes most in the first direction D1 in the entire retainer 22 may have the shape of the retainer 22 that is not a continuous portion at the upper ends of the side wall 2262 and the side wall 2271. For example, a continuous portion is provided at the upper end of the side wall portion 2272 on the inner peripheral side of the second groove portion 227, and is the same as the upper end of the side wall portion 2271 or protrudes in the first direction D1 side from the upper end of the side wall portion 2271. The shape made into the protrusion part may be sufficient.

[Description of packing]
As shown in FIGS. 6 and 7, a packing 228 is disposed in the second groove portion 227. The packing 228 is a ring made of synthetic rubber or synthetic resin, and is attached over the entire circumference of the second groove portion 227. An upper surface (projecting surface facing the filter head 13) 2281 of the packing 228 projects from the second projecting portion 232 in the first direction D1.
For this reason, as shown in FIG. 8, when the retainer 22, that is, the filter 20 is attached to the filter head 13 using the female screw portion 223, the surface 2281 of the packing 228 comes into close contact with the filter head 13. Since the packing 228 is in close contact with the filter head 13 and elastically deforms and seals, fluid such as oil and fuel flowing between the filter 20 and the filter head 13 is exposed to the outside through the gap between the filter head 13 and the retainer 22. It can prevent leakage.

As shown in FIG. 5, a communication hole 139 that communicates with the discharge port 140 of the filter head 13 is formed in the male screw portion 138 of the filter head 13. For this reason, the through hole in the female screw portion 223 of the retainer 22 communicates with the discharge port 140 of the filter head 13 through the communication hole 139. Further, the through hole 224 of the retainer 22 communicates with the suction port 132 through the communication hole 133 of the filter head 13.
A filter element is disposed in the outer case 21. Therefore, the fuel and engine oil supplied to the suction port 132 of the filter head 13 are supplied to the filter element from the through hole 224 of the retainer 22, and the fuel and engine oil filtered by the filter element are at the center of the filter element. The liquid flows from the through hole to the discharge port 140 of the filter head 13 through the female screw portion 223 and is discharged.

[Description of identification device]
The identification device 30 (30A, 30B, 30C) is attached to the first groove portion 226 of the retainer 22. The identification device 30 of the present embodiment includes a plurality of passive type IC tags that generate electric power by electromagnetic induction, microwaves, or the like by radio waves transmitted from the reader / writer 15. For this reason, a built-in battery can be made unnecessary, the cost can be reduced, and malfunction due to battery exhaustion can be prevented.
In this embodiment, as shown in FIGS. 4 and 6, the identification device 30 includes IC tags 301 and 302 that are identification components, respectively. The two IC tags 301 and 302 are arranged along the first groove 226.
Since the first groove portion 226 is formed in a circular shape, the IC tags 301 and 302 are curved in an arc shape and are attached to different positions in the circumferential direction along the first groove portion 226.

[Description of configuration of IC tag as identification part]
9 to 11 show the configurations of the IC tags 301 and 302. FIG.
9 is a perspective view showing the IC tags 301 and 302, FIG. 10 is a view showing the structure of the IC tags 301 and 302, and FIG. 11 is a view showing the layer structure of the IC tags 301 and 302. FIG. 10 shows a perspective view from a viewpoint perpendicular to the first direction D1 when the IC tags 301 and 302 are attached to the filter 20. On the other hand, FIG. 11 shows a structural diagram from the viewpoint from the first direction D1 when the IC tags 301 and 302 are attached to the filter 20. FIG.
As shown in FIGS. 9 to 11, each of the IC tags 301 and 302 includes two cover bodies 31 and 32, adhesive materials 33 and 34 attached to the cover bodies 31 and 32, and a package tag 35 that is an identification element. And an antenna 36. The package tag 35 and the antenna 36 are sandwiched between the cover bodies 31 and 32 using the adhesive materials 33 and 34.

[Description of cover body]
The cover bodies 31 and 32 are synthetic resin foams, and are made of a dielectric. The dielectric material preferably has a high dielectric constant in terms of the wavelength shortening effect, and preferably has a low dielectric loss in order to increase the radiation efficiency of the antenna 36. Further, the cover bodies 31 and 32 need to be made of an elastically deformable material that can be bent so that the cover bodies 31 and 32 can be mounted in the circular first groove 226.
For this reason, in this embodiment, the cover bodies 31 and 32 are comprised by the polyolefin foam and the polypropylene foam. As the cover bodies 31 and 32, other resin materials such as aniline resin, ABS (Acrylonitrile-Butadiene-Styrene) resin, AS (Acrylonitrile-Styrene) resin, glass fiber-filled silicone resin, and polyether can be used. . The material of the cover bodies 31 and 32 may be selected according to required characteristics such as permittivity that affects the communication characteristics of the antenna 36 and bendable flexibility for insertion into the first groove 226. Good. Furthermore, when the filter 20 is installed in a place where it touches rainwater, the cover bodies 31 and 32 may be made of a material that hardly absorbs moisture. In addition, a heating element such as an engine is installed near the filter 20 in the machine room 5A. Depending on the season and operating location, the work vehicle may be forced to operate at a high temperature, and when the work vehicle is in operation, the engine oil passing through the filter 20 may reach a high temperature exceeding 100 ° C. is there. Therefore, it is preferable that the cover bodies 31 and 32 are comprised with the material which has a heat resistant characteristic also under high temperature.

[Description of adhesive material]
The adhesive members 33 and 34 may be any material that can bond the cover bodies 31 and 32 to the package tag 35 and the antenna 36. Therefore, it is only necessary to select a material that can secure an adhesive force mainly according to the material of the cover bodies 31 and 32. In this embodiment, double- sided tape adhesives 33 and 34 are used.

[Description of package tag as identification element]
The package tag 35 is an RFID (Radio Frequency Identification) tag in which an IC chip and an internal antenna are enclosed with a package material.
The package tag 35 of the present embodiment can perform communication in a UHF (ultrahigh frequency) band, specifically, a band of 860 to 960 MHz as a communication frequency band. The communication frequency band of the RFID tag may be another band.
The package tag 35 is an ultra-small tag of about several mm square, and the communication distance is as short as several tens of millimeters with only the internal antenna. For this reason, the communication distance is expanded to about several meters by combining with the external antenna 36.

[Description of IC chip of package tag]
The IC chip of the package tag 35 includes a code (TID: Tag Identifier) for identifying the IC chip, that is, the package tag 35, and a code (EPC: Electronic Product) for identifying the filter 20 to which the identification device 30 is attached. Code) is stored. The EPC has tag information such as a part number for specifying the type of part (filter), a manufacturing date, a serial number (manufacturing number) for specifying each part among parts of the same part number, a supplier code indicating the manufacturer of the part, and the like. It is remembered.
In the present embodiment, two IC tags 301 and 302 are attached to one filter 20. For this reason, in the two IC tags 301 and 302, codes having different TIDs are stored, and the same codes are stored in EPC.
The management server 101 stores TID and EPC in association with each other. Therefore, the management server 101 collates the combination of the TID and EPC data read from the IC tags 301 and 302 with the stored data, thereby determining whether or not the filter 20 is a genuine product. It becomes possible. Or it is possible to grasp | ascertain the use time after the filter 20 was attached to the working vehicle by such collation. That is, the replacement time of the filter 20 can be managed.

[Description of antenna]
The antenna 36 is made of a metal such as phosphor bronze. As shown in FIG. 10, the antenna 36 has two linear conductors 361 and 362 arranged in parallel, and one end thereof is connected by a connecting portion 363 to form a U-shape of Katakana. It is configured as. The antenna 36 functions as a so-called inverted L antenna because the conductor 361 serves as an element and the conductor 362 serves as a ground. However, the configuration and shape of the antenna 36 are not limited to those shown in FIGS.

[Description of IC tag length]
Here, an example of the dimensions of the components of the IC tags 301 and 302 will be described.
The length dimension of the IC tags 301 and 302 shown in FIG. 10 in the longitudinal direction (the direction along the circumferential direction of the first groove 226) will be described. The length dimension L1 of the cover bodies 31 and 32 is set larger than the length dimension L2 of the antenna 36. That is, both end portions in the longitudinal direction of the cover bodies 31 and 32 protrude from the antenna 36 to form the structure portions 311, 321, 312, and 322. In the structure portions 311, 321, 312, and 322, the cover bodies 31 and 32 are bonded to each other by the adhesive materials 33 and 34.

[Explanation of IC tag height]
The dimensions of the IC tags 301 and 302 shown in FIG. 10 in the height direction (the height direction along the first direction D1 of the first groove portion 226) will be described. The height dimension H1 of the cover bodies 31 and 32 and the height dimension H1 of the adhesive materials 33 and 34 are the same.
As shown in FIGS. 12 and 13, IC tags 301 and 302 in which the height dimension H1 of the cover bodies 31 and 32 is increased may be used. FIG. 13 shows a state where the IC tags 301 and 302 having such a configuration are attached to the first groove portion 226 and the filter 20 is attached to the filter head 13. When the identification device 30 having such IC tags 301 and 302 is used, the antenna 36 does not directly contact the filter head 13 even if the upper surface 310 contacts the filter head 13. Communication performance can be ensured. That is, the cover bodies 31 and 32 are provided with protection parts 313 and 323 on the antenna 36 in the first direction D1 side and up to the upper surface 310 of the IC tags 301 and 302. Since the cover bodies 31 and 32 are made of a dielectric, the protection parts 313 and 323 are parts made of an insulating material. The protection units 313 and 323 may be provided separately from the cover bodies 31 and 32.
The height position of the upper surface 2281 of the packing 228 before the filter 20 is attached to the filter head 13 is higher than the height position of the upper surface 310 of the identification device 30. The portion that positively contacts the filter head 13 is the packing 228 to the last. When the identification device 30 as shown in FIGS. 7 and 8 is used, a protective portion provided with a tape such as an insulating resin or a coating agent is provided on the surface of the upper surface 310 of the identification device 30, and the filter 20. May be prevented from contacting the filter head 13 and the antenna 36 directly.

[Description of position of package tag in IC tag]
As shown in FIGS. 10 and 12, the package tag 35 is disposed at a position separated from the connecting portion 363 of the antenna 36 by a predetermined dimension M1.
As shown in FIGS. 10 and 12, the end of the cover body 31, 32 in the longitudinal direction on the side where the package tag 35 is disposed is chamfered with the corners cut obliquely. Thereby, in the IC tags 301 and 302, it can be grasped on which side of the IC tags 301 and 302 the package tag 35 is arranged in the longitudinal direction. Therefore, when the two IC tags 301 and 302 are mounted in the first groove 226, the mounting direction can be unified in each IC tag 301 and 302 by providing the chamfering, thereby facilitating work management and quality control. be able to.
Therefore, in this embodiment, the structure parts 311 and 321 of each IC tag 301 and the structure parts 312 and 322 of the IC tag 302 are mounted in a facing direction.
However, the structural portions 312 and 322 of the IC tag 301 and the IC tag 302 may be attached to each other. In this case, the package tags 35 of the IC tags 301 and 302 are arranged at positions closest to each other in the circumferential direction of the filter 20.
Further, the structural portions 311 and 321 of the IC tag 301 and the IC tag 302 may be attached to each other. In this case, the package tags 35 of the IC tags 301 and 302 are arranged at positions farthest in the circumferential direction of the filter 20.
The variation in reception performance depending on the mounting direction of each IC tag 301, 302 is very small compared to the difference in reception performance between the case where only one IC tag is provided and the case where two IC tags are provided. Therefore, in terms of reception performance, the mounting direction of the two IC tags 301 and 302 is not limited, and the mounting direction may be set in consideration of work management and quality management during mounting.

[Description of IC tag width]
The dimensions of the IC tags 301 and 302 shown in FIG. 11 in the width direction (width direction perpendicular to the first direction D1 of the first groove 226) will be described. The thickness dimension t1 of the two cover bodies 31 and 32 is the same. The thickness t2 of the antenna 36 is, for example, 0.1 mm. The thickness dimension t3 of the adhesive materials 33 and 34 is also very thin and slightly larger than the thickness dimension of the antenna 36. The thickness dimension t4 of the package tag 35 is thicker than the thickness dimension t2 of the antenna 36.

Since the cover bodies 31 and 32 are made of an elastic material, and the antenna 36 has a thin thickness t2 and can be bent, the IC tags 301 and 302 are configured to be elastically deformed as a whole.
For this reason, the IC tags 301 and 302 are attached to the first groove portion 226 while being curved along the first groove portion 226 formed in a circular shape. Then, the IC tags 301 and 302 are bonded and fixed while being inserted into the first groove 226 by an adhesive (not shown) applied in the first groove 226.

Since the thickness t1 of the cover bodies 31 and 32 is the same, the antenna 36 can be disposed at the center position in the width direction of the first groove 226. For this reason, the antenna 36 can be disposed at an intermediate position between the side wall portions 2261 and 2262. When the antenna 36 approaches the metal side wall portions 2261 and 2262, the communication performance decreases. Therefore, the antenna 36 is disposed at an intermediate position between the side wall portions 2261 and 2262 and disposed at a position farthest from the side wall portions 2261 and 2262, thereby preventing a decrease in communication performance.

[Explanation regarding suppression of antenna springback]
As shown in FIGS. 10 and 12, the cover bodies 31 and 32 include structural portions 311 and 321 having a dimension L4 and structural portions 312 and 322 having a dimension L5, thereby structurally preventing the spring back of the antenna 36. is doing. That is, when the IC tags 301 and 302 are attached to the first groove portion 226, the antenna 36 that has been linearly formed before attachment is curved along the first groove portion 226. For this reason, the antenna 36 tries to return to the original linear shape. Therefore, both ends of the cover bodies 31 and 32 are protruded from the antenna 36 to form structure portions 311, 321, 312, and 322. The structural portions 311, 321, 312, and 322 function as portions that secure rigidity by absorbing force due to the springback of the antenna 36.
If the dimension L4 of the structural parts 311 and 321 and the dimension L5 of the structural parts 312 and 322 are made larger than a predetermined length, the effect of suppressing the spring back can be obtained.

[Explanation of verification experiment of antenna springback suppression effect]
14 and 15 show experimental examples of the effect of suppressing the spring back by the dimensions L4 and L5 of the structural parts 311, 321, 312 and 322. FIG. FIG. 14 is a top view of the filter 20 as seen from the first direction D1 before the fuel and engine oil are allowed to flow just by attaching the IC tags 301 and 302 to the filter 20 (before use). FIG. 15 is a top view of the filter 20 as viewed from the first direction D1 after the filter 20 is attached to the excavator 1 and after a predetermined time of operation, that is, after the fuel and oil have flowed through the filter 20 (after use). .
Further, the filter 20 was compared with two types of IC tags 30D and 30E having different dimensions L4 and L5. The IC tag 30D is obtained by setting the dimensions L4 and L5 of the structural parts 311, 321, 312, and 322 to 3 mm, and the IC tag 30E is obtained by setting the dimensions L4 and L5 to 5 mm.

As shown in FIG. 14, before the filter 20 is used, any IC tags 30D and 30E can suppress the springback of the antenna 36. That is, the antenna 36 can be maintained at the center position in the width direction of the first groove portion 226. On the other hand, as shown in FIG. 15, after using the filter 20, the IC tag 30E was able to suppress the springback of the antenna 36, but the IC tag 30D was crushed by the springback on the outer cover 31. As indicated by arrows in FIG. 12, both ends of the antenna 36 approach the side wall 2261 side. Although not shown in the drawings, even in an IC tag experiment in which the dimensions of L4 and L5 were set longer, the springback could be suppressed in the same manner as the IC tag 30E.

The oil filtered by the filter 20 may be in a high temperature state of 100 ° C. or higher as described above, and the cover bodies 31 and 32 are also heated and easily deformed. Therefore, the larger the dimensions of the structural portions 311, 321, 312, and 322 that are not directly pushed by the antenna 36, the more the springback can be suppressed. In this embodiment, if the dimensions L4 and L5 are 5 mm or more, the springback Was able to be suppressed.
However, if the dimensions L4 and L5 of the structural parts 311, 321, 312 and 322 are increased, the costs of the cover bodies 31 and 32 and the adhesive materials 33 and 34 are increased. It is preferable.

[Description of how to set the antenna length]
The length dimension (longitudinal dimension) L2 of the antenna 36 shown in FIGS. 10 to 12 is a frequency (wavelength λ) of radio waves to be transmitted and received, and the cover body laminated on the antenna 36 via adhesive materials 33 and 34. The length is set to about ½ of the wavelength λ1 obtained by the dielectric constant ε of 31 and 32. The length of the antenna 36 is such that the radio wave from the reader / writer 15 can be received satisfactorily.

[Description of IC tag placement position]
In this embodiment, as shown in FIGS. 4 to 7, two IC tags 301 and 302 are arranged in the first groove portion 226 of the retainer 22. The two IC tags 301 and 302 are IC tags having the same structure and dimensions. The IC tags 301 and 302 are arranged such that the longitudinal direction thereof is the direction along the circumferential direction of the first groove 226. Further, the IC tags 301 and 302 are arranged at positions where the end portions in the longitudinal direction are in contact with each other or close to each other. Therefore, the central angle θ (FIG. 6) connecting one end of the two IC tags 301 and 302 and the screw shaft O of the female screw portion 223 is the diameter of the first groove portion 226, that is, the diameter of the retainer 22. It becomes a value according to.
For example, when the diameter of the first groove 226 is 94 mm and the dimension L1 in the longitudinal direction of the IC tags 301 and 302 is 86 mm, the central angle θ is 105 degrees. When the diameter of the first groove portion 226 is 137 mm and the dimension L1 in the longitudinal direction of the IC tags 301 and 302 is 96 mm, the central angle θ is 120 degrees.
The screw shaft O coincides with the central axis of the circular retainer 22 and the central point of the first groove 226 when viewed from the first direction D1 (filter head side) and also coincides with the central axis of the filter 20. .

As described above, by arranging the two IC tags 301 and 302 so that the end portions thereof face each other, the central angle θ can be prevented from being 180 degrees. That is, it is possible to prevent the two IC tags 301 and 302 from being arranged at positions facing each other across the screw shaft O.
Thus, when the filter 20 is attached by screwing into the filter head 13, even if the position of one IC tag 302 is not suitable for communication with the reader / writer 15, the other IC tag 301 is connected to the reader / writer 15. Can be arranged at a position where communication is possible.

This will be described in detail with reference to FIG.
FIG. 16 is a top view showing the arrangement state of the IC tag, showing the relative positional relationship between the reader / writer 15 and the filter 20, and shows the filter 20 viewed from the first direction D1. Further, FIG. 16 shows that when two IC tags 301 and 302 attached to the filter 20 are arranged at positions facing each other across the screw shaft O, that is, the two antennas 36 face each other across the screw shaft O. The case where it arrange | positions to the position is represented.
For example, as in the comparative example shown in FIG. 16, when the two IC tags 301 and 302 are arranged at positions facing each other with the screw shaft O interposed therebetween, when the filter 20 is screwed and rotated, the two IC tags In some cases, the antennas 36 of the tags 301 and 302 are substantially parallel to the traveling direction F of the radio wave transmitted from the reader / writer 15. In this case, it is difficult for any of the antennas 36 to receive the radio wave transmitted from the reader / writer 15, and the reception performance is significantly reduced.

On the other hand, FIG. 17 is also a top view showing the arrangement state of the IC tag similarly to FIG. 16, and shows the relative positional relationship between the reader / writer 15 and the filter 20, and the filter 20 is moved in the first direction. It is a state seen from D1. In FIG. 17, when two IC tags 301 and 302 attached to the filter 20 are arranged with their ends abutting each other, that is, the two antennas 36 are arranged at positions other than the positions where they face each other across the screw shaft O. Represents the case.
In the present embodiment, as shown in FIG. 17, the end portions of the two IC tags 301 and 302 are arranged to face each other, so that the antenna 36 of one IC tag 302 is substantially parallel to the traveling direction F of the radio wave. Even if it exists, the antenna 36 of the other IC tag 301 intersects the traveling direction F of the radio wave and can receive the radio wave.

Furthermore, in this embodiment, as shown in FIG. 6, the antennas 36 of the two IC tags 301 and 302 are arranged over an area of about 180 degrees in the circumferential direction of the first groove 226. If the two antennas 36 cover an area of 180 ° or more of the first groove portion 226, the radio wave transmitted from the reader / writer 15 even if the position of the antenna 36 relative to the reader / writer 15 is changed by screwing the filter 20 Can be received, and data can be transmitted to the reader / writer 15.

Even if the two antennas 36 cannot cover the region of 180 degrees or more of the first groove portion 226, the distance to the reader / writer 15 and the output of the reader / writer 15 as long as the region of about 150 degrees or more is covered. It is often possible to communicate by adjusting the above. For this reason, it is preferable to cover the region of 180 degrees or more of the first groove portion 226 with the two antennas 36, but it is not essential to cover the region of 180 degrees or more.

[Description of the height position of the upper surface (projection surface) of the IC tag]
The IC tags 301 and 302 are disposed and bonded to the first groove 226 so that the height position of the upper surface 310 is located between the first protrusion 231 and the second protrusion 232 (FIG. 7). .
The protrusion dimension H11 of the first protrusion 231 located at the upper end of the outer peripheral side wall 2261 is smaller than the protrusion dimension H12 of the inner peripheral second protrusion 232. Therefore, the height position of the first protrusion 231 is lower than that of the second protrusion 232. Then, the upper surface 310 of the IC tags 301 and 302, that is, the antenna 36 is set so as to fit in a position between the upper end of the first protrusion 231 and the upper end of the second protrusion 232.
For this reason, the height dimension H20 (hereinafter referred to as the projection dimension H20) of the projecting portion from the first projecting portion 231 to the upper surface 310 is a value equal to or less than H13 obtained by H12−H11.
When the IC tags 301 and 302 shown in FIG. 12 are used, the upper surfaces 310 of the IC tags 301 and 302 are higher than the first projecting portion 231 and the second projecting portion 232.

Therefore, as shown in FIG. 8, when the filter 20 is attached to the filter head 13, it is possible to easily prevent the upper surfaces 310 of the IC tags 301 and 302, that is, the antenna 36 from coming into contact with the filter head 13. That is, when the filter 20 is attached to the filter head 13 by screwing the female screw portion 223 of the filter 20 into the male screw portion 138 of the filter head 13, the packing 228 first contacts the filter head 13. By screwing the filter 20, the packing 228 is crushed to some extent. For this reason, when the operator holds the filter 20 by hand and screws it, the possibility that the filter 20 is screwed until the retainer 22 contacts the filter head 13 is low. When the filter 20 can be further screwed in using a jig for tightening the filter 20, the packing 228 is further crushed and is second from the upper surface 310 of the IC tags 301 and 302 shown in FIGS. Since the protruding portion 232 protrudes toward the filter head 13, the second protruding portion 232 contacts the filter head 13, but the filter 20 cannot be screwed any further. In the present embodiment, since the position of the upper surface 310 is set so as not to protrude from the second protruding portion 232, the upper surface 310 of the IC tags 301 and 302, that is, the antenna 36 shown in FIGS. 13 can be reliably prevented from contacting.
When the upper surfaces 310 of the IC tags 301 and 302 come into contact with the metal filter head 13, the communication characteristics of the antenna 36 are degraded, and communication with the reader / writer 15 becomes difficult. On the other hand, in the present embodiment, as described above, the IC tags 301 and 302 do not contact the filter head 13, so that the communication performance with the reader / writer 15 can be ensured.

12 and 13, if the IC tags 301 and 302 in which the height dimension H1 of the cover bodies 31 and 32 is increased are used, the upper surface 310 of the IC tags 301 and 302, that is, the antenna 36 is at least from the first projecting portion 231. The second protrusion 232 need not be at a higher position than the upper surface 310 of the IC tags 301 and 302 as long as it is at a higher position. Therefore, quality management is simplified by using IC tags 301 and 302 as shown in FIGS.

In addition, since the upper surface 310 of the IC tags 301 and 302 shown in FIG. 8, that is, the antenna 36 protrudes from the upper surface of the first protruding portion 231, the IC tag is formed in the gap between the first protruding portion 231 and the filter head 13. A part of 301 and 302 can be exposed. That is, a gap with the protruding dimension H20 shown in FIG. 8 is formed. Therefore, the IC tags 301 and 302 can transmit and receive radio waves through the gap formed between the first projecting portion 231 and the filter head 13, and in this respect as well, communication performance with the reader / writer 15 can be ensured. it can.
12 and 13, the same applies to the case where IC tags 301 and 302 are used in which the height dimension H1 of the cover bodies 31 and 32 is increased, and the projection dimension H20 has a predetermined dimension as shown in FIG. By forming the gap, the communication performance with the reader / writer 15 can be ensured.

As shown in FIGS. 8 and 13, the first protrusion 231 and the second protrusion 232 are formed continuously with the side walls 2261 and 2262 of the first groove 226, and the first groove 226 is a portion necessary for inserting a tool when the retainer 22 and the outer case 21 are caulked and joined. Since the first groove 226 having such a role is also used as a structure for arranging the IC tags 301 and 302, the retainer 22 is highly functional, and the first and second grooves 226 are located at positions different from the first groove 226. The shape of the retainer 22 can be simplified and the manufacturing cost can be reduced as compared with the case where the two protruding portions are formed.

[Explanation of experiment]
Next, experimental results using the filter 20 of the present embodiment will be described.
In the experiment, the received signal strengths of the two IC tags 301 and 302 when the filter 20 was rotated every 30 degrees around the screw axis O were measured. 18 and 19 are experimental results in an anechoic box (shield box), and are performed for confirming a change in received signal strength due to the protruding dimension H20 from the first protruding portion 231 of the IC tags 301 and 302. FIG. It was.
Here, FIG. 18 shows the measurement results of the present embodiment, specifically, the measurement results when the protruding dimension H20 from the first protruding portion 231 of the IC tags 301 and 302 is 0 mm. FIG. 19 shows the measurement results of the comparative example, specifically the measurement results when the protrusion dimension H20 is −1 mm. 18 and 19, the vertical axis represents the received signal strength (dbm), and the horizontal axis represents the rotation angle (deg) of the filter 20. 18 and 19, a line graph 401 is a graph obtained by connecting the plots by indicating the received signal strength in the IC tag 301 as a square plot. A line graph 402 is a graph in which the received signal intensity in the IC tag 302 is shown by a rhombus plot, and this plot is connected. A line graph 403 indicated by a dotted line is a graph obtained by connecting plots having large values among the received signal strengths of the IC tags 301 and 302.

FIG. 18 shows that at least one of the IC tags 301 is provided if the upper surfaces 310 of the IC tags 301 and 302 are disposed at a height higher than the first protruding portion 231 located on the outer peripheral side (the protruding dimension H20 is 0 mm or more). , 302 can be maintained at about −60 dbm. Therefore, if the protrusion dimension H20 is 0 mm or more, at least one data of the IC tags 301 and 302 having a high received signal strength can be acquired. Moreover, if it is the protrusion dimension H20, even if the filter 20 is rotated 360 degrees, communication with the reader / writer 15 is possible at any angle. Therefore, by attaching the two IC tags 301 and 302 and setting the protruding dimension H20 to 0 mm or more, the reader / writer 15 reads the data of the IC tags 301 and 302 over the entire circumference regardless of the rotation angle of the filter 20. It was confirmed that can be achieved.

On the other hand, as shown in FIG. 19, when the arrangement position of the upper surface 310 of the IC tags 301 and 302 is less than the height position of the first projecting portion 231 located on the outer peripheral side (projecting dimension H20 is less than 0 mm). The received signal strength of any of the IC tags 301 and 302 was as low as less than about −60 dbm, and communication with the reader / writer 15 was difficult. It should be noted that a radio wave having a received signal strength of less than −80 dbm is at a level at which reception of the radio wave cannot be detected.
As described above, the effectiveness of setting the upper surface 310 of the IC tags 301 and 302, that is, the antenna 36, to be equal to or higher than the height of the first protrusion 231 outside the first groove 226 has been confirmed by experiments.

In FIG. 18, there is an angle at which the received signal strength greatly decreases, but this is mainly due to the influence of the relative position between the filter head 13 and the filter 20 (antenna 36). That is, the portion where the suction port 132 and the discharge port 140 of the filter head 13 are formed protrudes in the direction perpendicular to the first direction D1, that is, outside as shown in FIG. 4 and FIG. As described above, the upper part of the IC tags 301 and 302 is covered. On the other hand, the other part of the filter head 13 has an arcuate shape along the side wall 2262, and the upper part of the IC tags 301 and 302 is exposed as shown in FIG. For this reason, when the filter 20 is rotated, there is a position where the received signal strength decreases due to the relative positional relationship between the filter head 13 and the one antenna 36. Even in this case, since the received signal strength at the other antenna 36 is −60 dbm or more (determination value or more), the other IC tags 301 and 302 can reliably communicate with the reader / writer 15.

As described above, if the mounting position of the filter 20 varies due to variations in the screwing amount when the filter 20 is screwed, the relative position of the identification device 30 with respect to the reader / writer 15 also varies. Even in this case, in this embodiment, since the two IC tags 301 and 302 are attached to the first groove portion 226 of the retainer 22 of the filter 20, at least one of the IC tags 301 and 302 is transmitted from the reader / writer 15. Radio waves can be received reliably. That is, the reader / writer 15 can read the information stored in the IC tags 301 and 302 regardless of the orientation of the filter 20 with respect to the reader / writer 15.

Furthermore, since each antenna 36 covers an area of approximately ½ circumference (180 degrees) in the circumferential direction of the first groove 226, the IC tags 301 and 302 can receive only the direct wave transmitted from the reader / writer 15. In addition, it is possible to receive a reflected wave that is reflected by a wall surface of the machine room 5A (engine room or pump room). For this reason, even when metal parts and piping are arranged between the IC tags 301 and 302 and the reader / writer 15 and direct wave transmission / reception is not possible, the reader / writer 15 is connected to the IC tags 301 and 302 by reflected waves. Information can be read.
Therefore, when a plurality of filters 20 are arranged, it is not necessary to perform a detailed simulation of the radio wave propagation state, and the reader / writer 15 can easily read the tag information of the IC tags 301 and 302.

In many cases, the outer case 21 of the filter 20 is provided with a description such as an installation instruction diagram of the filter 20, but the IC tags 301 and 302 are placed in the groove 226 of the retainer 22 that is the upper surface of the filter 20. Since it is attached, it is possible to prevent the attachment instruction diagram from being hidden. For this reason, the operator can perform the attachment work of the filter 20 while confirming the attachment instruction diagram. Furthermore, since the IC tags 301 and 302 are attached to places that are difficult to see from the outside of the filter 20, it is possible to prevent a decrease in the aesthetics of the filter 20.

When an operator installs a new filter 20, the filter 20 is grasped by hand and screwed into the filter head 13. However, since the filter 20 has a certain amount of weight, the operator can lift the filter 20 while lifting the filter 20 by hand. It is necessary to screw it in while pressing it against 13. Therefore, the worker performs the mounting operation while touching the outer case 21 of the filter 20. Since the IC tags 301 and 302 are mounted in the first groove portion 226 of the retainer 22 that is the upper surface of the filter 20, the operator's hand hardly touches the IC tags 301 and 302. Therefore, excessive stress is applied to the IC tags 301 and 302 by the power of the operator's hand and the IC tags 301 and 302 are not damaged, and dirt such as oil and mud is passed through the operator's hand. Adhering to the surfaces of 301 and 302 can also be prevented.

In addition, when removing the filter 20 in order to replace the filter 20, the removal work is performed using a tool called a filter wrench. The operator hangs the filter wrench on the outer case 21 of the filter 20 and removes it. However, since the IC tags 301 and 302 are attached to the retainer 22, the worker places the filter wrench as a place to hang the filter wrench. Any one of the locations 21 can be selected, and the removal work of the filter 20 can be easily performed without hindering the work.

[Modification]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the end portions of the IC tags 301 and 302 are attached to the first groove portion 226 in a state where the end portions of the IC tags 301 and 302 face each other, but the end portions of the IC tags 301 and 302 may be arranged apart from each other.
In the above embodiment, the identification device attached to the first groove 226 of the filter 20 uses the IC tags 301 and 302 including the package tag 35 as the identification element and the antenna 36 as identification components. The identification device is not limited to this, and may include one identification element (package tag 35) and two antennas 36. That is, one identification element (package tag 35) and two antennas 36 may be attached to one filter 20 as a set. One of the IC tags 301 and 302 shown in FIGS. 9 to 11 and one IC tag obtained by removing the package tag 35 from any one of the IC tags 301 and 302 shown in FIGS. 20 is attached. The attachment form is the same as that shown in FIGS. 4 to 8 and 13 in the description of the above embodiment. At this time, it is sufficient that each antenna 36 is prepared with an appropriate size, can communicate with the reader / writer 15 independently, and can be electromagnetically coupled to the main antenna of the package tag 35 as an identification element.
Alternatively, a single IC tag may be used in which two antennas 36 are arranged adjacent to one package tag 35.
As described above, when an IC tag including one package tag 35 and two antennas 36 is used, the package tag 35 can be activated by radio waves received by each antenna 36. That is, when any one of the two antennas 36 can receive the radio wave transmitted from the reader / writer 15, the information stored in the package tag 35 is transmitted to the reader / writer 15. Note that the package tag 35 and the antenna 36 are not separated as shown in FIG. 11, and may be configured to be electrically connected and integrated by providing a port for connecting the antenna 36 to the package tag 35.

Furthermore, the antenna 36 is not limited to the shape of the above embodiment. That is, the antenna 36 may be a shortened antenna formed by bending or a monopole antenna.

In the above embodiment, the IC tags 301 and 302 having the package tag 35 and the antenna 36 are configured. However, the IC tag configured by extending the main antenna directly connected to the IC chip into a belt shape is used. Also good. The IC tags 301 and 302 may be manufactured by a manufacturing method different from that in the above embodiment. For example, a manufacturing method may be used in which the package tag 35 and the antenna 36 are mounted on a mold, and resin is poured into the mold and sealed. In this case, the shape of the mold portion to which the package tag 35 and the antenna 36 are attached is formed to correspond to the shape of the first groove portion 226 of the retainer 22 of the filter 20 to which the IC tags 301 and 302 are attached. ing.

In the embodiment, the identification device 30 (IC tags 301 and 302) is attached to the retainer 22 facing the filter head 13 in the filter 20, but a groove is formed on the bottom surface of the filter 20 opposite to the retainer 22. The identification device 30 may be attached. For example, the identification device 30 may be attached by forming a groove in an end surface portion of the filter 20 other than the outer case 21. That is, the identification device 30 may be attached by forming a groove on the surface of the filter 20 that intersects the screw axis O.
However, it is preferable to form a groove in the retainer 22 as compared with the case where a groove is formed on the bottom surface of the filter 20 in terms of cost reduction.
Further, the surface on which the groove to which the identification device 30 (IC tags 301 and 302) is attached is not limited to a surface orthogonal to the screw axis of the filter 20, but an inclination that intersects the screw axis O at an angle other than 90 degrees. It may be a surface.

Furthermore, the filter of the present invention is not limited to the filter 20 having the cylindrical outer case 21 of the above-described embodiment, but may have a rectangular tube-shaped outer case such as a square or hexagon. Further, the filter is not limited to a filter attached to the filter head 13 with a screw portion.
Furthermore, the 1st protrusion part 231 and the 2nd protrusion part 232 of this invention are not limited to what is comprised in the part which follows the upper end part of the side wall parts 2261 and 2262 of the 1st groove part 226. For example, a portion continuous with the upper end portion of the side wall portion 2272 on the inner peripheral side of the second groove portion 227 may be projected from the side wall portion 2271 and used as the second protruding portion 232.

The present invention can be applied not only to construction machines such as hydraulic excavators but also to other construction machines such as wheel loaders, bulldozers, motor graders, dump trucks, and to industrial vehicles such as forklifts. That is, it can be used for an engine oil filter and a fuel filter in work vehicles such as construction machines and industrial vehicles.

DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator, 13, 13A, 13B, 13C ... Filter head, 15, 15A, 15B ... Leader writer, 20, 20A, 20B, 20C ... Filter, 21 ... Exterior case, 22 ... Retainer, 30, 30A, 30B, 30C ... Identification device 31, 32 ... Cover body, 33, 34 ... Adhesive material, 35 ... Package tag, 36 ... Antenna, 221 ... End plate, 222 ... Cover plate, 223 ... Female screw part which is a screw part, 226 ... 1st groove part which is a groove part, 231 ... 1st protrusion part, 232 ... 2nd protrusion part, 301, 302 ... IC tag, 310 ... Upper surface, 311, 321, 312, 322 ... Structure part, 313, 323 ... Protection part 2261, 2262... Side wall portions.

Claims (10)

1. A filter mounted on a work vehicle,
   An outer case,
   A metal end member attached to the opening end of the exterior case;
   An identification device attached to the end member;
   The identification device has at least one identification element and at least one antenna;
   The end member has a groove that opens on the surface of the end member, and a first protrusion that protrudes most in a first direction orthogonal to the surface on the outer peripheral side of the groove,
   The position of the antenna of the identification device in the first direction is closer to the first direction than the first protrusion.
2. The filter according to claim 1, wherein
   The identification device includes a protection unit made of a material having an insulating property in the first direction of the antenna.
3. The filter according to claim 1 or 2,
   A second projecting portion projecting in the first direction on the inner peripheral side of the groove portion;
   The position of the second protrusion in the first direction is closer to the first direction than the first protrusion.
   The filter is characterized in that the position of the second protrusion in the first direction is closer to the first direction than the antenna.
4. The filter according to any one of claims 1 to 3,
   The end member includes a screw portion for attachment to the work vehicle,
   The filter according to claim 1, wherein the first direction is a screw shaft direction of the screw portion.
5. The filter according to any one of claims 1 to 4,
   The identification device is
   A first identification component having one identification element and one antenna;
   A filter comprising: a second identification component having one identification element and one antenna.
6. The filter according to any one of claims 1 to 5,
   The antenna is disposed at a center position in the width direction of the groove.
7. The filter according to any one of claims 1 to 6,
   Attached to a filter holding part mounted on the work vehicle,
   A filter, wherein a reader mounted on the work vehicle reads information of the identification element.
8. The filter according to claim 7,
   The filter holding part is made of metal,
   When the filter is attached to the filter holding part, the first protrusion forms a gap without contacting the filter holding part,
   The filter is characterized in that an end of the antenna in the first direction is positioned in the gap.
9. A filter mounted on a work vehicle,
   An exterior case,
   A metal end member attached to the opening end of the exterior case;
   An identification device attached to the end member;
   The end member is
   A screw portion for attachment to the work vehicle;
   A groove opening on the surface of the end member;
   A first protrusion that is continuously provided on the outer peripheral wall of the groove and protrudes most in a first direction orthogonal to the surface on the outer periphery of the groove;
   A second projecting portion that is provided continuously to the wall portion on the inner peripheral side of the groove portion and protrudes most in the first direction on the inner peripheral side of the groove portion;
   The first direction is a screw shaft direction of the screw portion;
   The second protrusion protrudes in the first direction from the first protrusion,
   The identification device includes:
   A first identification component having one identification element, one antenna, and a cover body that is formed of a resin foam and sandwiches the identification element and the antenna;
   A second identification component having one identification element, one antenna, and a cover body that is made of a resin foam and sandwiches the identification element and the antenna;
   The antenna is disposed at a center position in the width direction of the groove,
   The position of the antenna in the first direction is located on the first direction side from the first protrusion, and on the opposite side of the first direction from the second protrusion,
   The first identification component and the second identification component each include a protective portion that is located in the first direction with respect to each of the antennas and is made of an insulating material.
10. A work vehicle comprising the filter according to any one of claims 1 to 9.

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