JP2009018607A - Patch for fixing detection device, tire and method for fixing detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a patch for fixing a detection device which is capable of reducing any failure of the detection device and itself, and capable of recycling the detection device and itself even when a tire cannot be used any more, a tire having a detection system comprising the detection device and the patch for fixing the detection device, and a method for fixing the detection device to an inner surface of the tire. <P>SOLUTION: The patch 17 for fixing the detection device fixes a detection device 15 for detecting a state of a tire to an inner surface (an inner liner) of the tire, and comprises a base part 23 arranged on the inner surface of the tire, and a holding part 25 for holding the detection device 15. The holding part 25 comprises a loading part 31 which is fixed to the base part 23 with the detection device 15 being loaded thereon, and a tongue part 33 which extends from the loading part 31, and is bent to cover at least a part of the detection device 15 and fix the detection device 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a detection device fixing patch for fixing a detection device for detecting a state of a tire to the inner surface of the tire, a tire including a detection system including the detection device and the detection device fixing patch, and the detection device to the tire. The present invention relates to a detection device fixing method for fixing to the inner surface of the sensor.

  Conventionally, various proposals have been made on a technique for fixing a detection device that detects a tire state (for example, internal pressure, internal temperature, and wear). For example, a technology for embedding a detection device in a rubber part of a tire and a technology for fixing the detection device with a fastener embedded in a rubber body attached on the inner surface of the tire are disclosed (for example, Patent Literature 1 and Patent Literature 1). 2).

By the way, a user who handles a plurality of large vehicles such as expensive trucks (for example, a carrier who uses a plurality of trucks for transportation) consumes fuel consumption due to a decrease in tire condition (especially internal pressure and wear). In consideration of mitigation as much as possible, the condition of tires is frequently checked for each vehicle. That is, in recent years, in order to make it easy to grasp the state of a tire from a long distance, the above-described detection device is often attached to a tire mounted on a large vehicle.
Japanese translation of PCT publication No. 2002-502765 JP 2002-541003 A

  However, in the conventional technology in which the detection device is embedded in the rubber part of the tire, the detection device is permanently installed in the rubber part, and the deformation of the tire or the deformation due to the centrifugal force due to the weight of the detection device during the rotation of the tire. As a result, there is a problem that the detection device is likely to break down. In particular, a tire mounted on a large vehicle has a lot of wear or failure, and when the tire becomes unusable due to wear or failure, the detection device is not reused.

  Furthermore, in the conventional technology for fixing the detection device with the fastener embedded in the rubber body, the rubber body itself, the fastener, or the rubber body may be caused by deformation of the tire or deformation due to the centrifugal force due to the weight of the detection device during rotation of the tire. There was a problem that it was likely to break down between the inner liner and the inner liner.

  Therefore, the present invention has been made in view of such a situation, and it is possible to reduce the failure of the detection device and the detection device fixing patch, and to detect even when the tire becomes unusable. Device and detection device fixing patch capable of reusing the detection device fixing patch, a tire including a detection system including the detection device and the detection device fixing patch, and a detection device for fixing the detection device to the inner surface of the tire The purpose is to provide a fixing method.

  In order to solve the above-described problems, the present invention has the following features. First, the invention according to the first feature is a detection device fixing patch for fixing a detection device for detecting a state of a tire to an inner surface of the tire, and holds a base portion disposed on the inner surface of the tire and the detection device. A holding portion that is fixed to the base and on which the detection device is placed, and extends from the placement portion and is bent to cover at least a part of the detection device. And a tongue for fixing the detection device.

  According to this feature, the tongue is bent to cover at least a part of the detection device, thereby fixing the detection device, such as deformation of the tire or deformation due to centrifugal force due to the weight of the detection device during rotation. The deformation transmitted directly can be absorbed by the deformation of the base.

  As a result, fatigue, stress, strain, impact, vibration, etc. of the detection device fixing patch can be minimized, and the failure of the detection device and the detection device fixing patch can be reduced and the tire can be used. Even if it disappears, the detection device and the detection device fixing patch can be reused.

  Another aspect of the invention is characterized in that the holding portion includes at least one of urethane, epoxy, polyester-sterene resin, hard rubber composition, and non-foaming compound.

  According to this feature, since the holding portion is made of the hard material, the detection device can be protected, and the detection device can be securely fixed to the base via the holding portion.

  Another aspect of the invention is characterized in that a fiber reinforced yarn is embedded in the tongue.

  According to this feature, since the fiber reinforced yarn is embedded in the tongue, the rigidity of the tongue can be increased, so that the durability of the tongue can be improved, and the detection device fixing patch It is possible to extend the life of the battery.

  Another aspect of the invention is characterized in that the detection device has a protrusion protruding toward the inside of the tire, and a locking hole that locks the protrusion is formed in the tongue. .

  According to another aspect of the invention, a base portion includes a base portion fixed on the inner surface of the tire, and a main body portion extending substantially orthogonally from the base portion, and the main body portion includes a receiving hole that can receive a mounting portion. And an insertion hole through which the tongue can be inserted.

  An invention according to another feature is a tire including a detection system including a detection device that detects a state of the tire and a detection device fixing patch that fixes the detection device to an inner surface of the tire, and the detection device fixing patch includes: A base portion disposed on the inner surface of the tire, and a holding portion that holds the detection device, the holding portion is fixed to the base portion, a mounting portion on which the detection device can be mounted, and extends from the mounting portion, A gist is provided with a tongue that is bent and covers at least a part of the detection device to fix the detection device.

  Another aspect of the invention is a patch fixing step of fixing a detection device fixing patch including a base portion disposed on an inner surface of a tire and a holding portion for holding a detection device for detecting a state of the tire to the inner surface of the tire. And a detecting device arranging step of arranging the detecting device between tongue portions extending from the mounting portion constituting the holding portion, and a device for fixing the detecting device by folding the tongue portion and covering at least a part of the detecting device The gist is to include at least a fixing step.

  The gist of another aspect of the invention is that it further includes an unlocking step of releasing the fixation between the detection device and the holding unit, and a new detection device fixing step of fixing a new detection device to the holding unit.

  According to the present invention, failure of the detection device and the detection device fixing patch can be reduced, and the detection device and the detection device fixation patch can be reused even when the tire cannot be used. A detection device fixing patch, a tire including a detection system including the detection device and the detection device fixing patch, and a detection device fixing method for fixing the detection device to the inner surface of the tire can be provided.

  Next, an example of a pneumatic tire according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(Composition of pneumatic tire)
First, the configuration of the pneumatic tire according to the present embodiment will be described with reference to FIG. FIG. 1 is a cross-sectional view in the tread width direction showing the pneumatic tire according to the present embodiment. The pneumatic tire according to the present embodiment is a truck / bus radial tire (TBR).

  As shown in FIG. 1, the pneumatic tire 1 includes a bead portion 3 that is in contact with a rim (not shown), and a carcass layer 5 that is folded back at the bead portion 3. Inside the carcass layer 5, an inner liner 7 which is a highly airtight rubber layer corresponding to a tube is provided.

  A tread portion 9 that is in contact with the road surface is provided outside the carcass layer 5 in the tire radial direction. A plurality of belt layers 11 that reinforce the tread portion 9 are provided between the carcass layer 5 and the tread portion 9. Further, a detection system 13 that detects the state of the pneumatic tire 1 is provided on the inner side of the inner liner 7 in the bead portion 3 in the tire radial direction.

(Configuration of detection system)
Next, the configuration of the detection system according to the present embodiment will be described with reference to FIGS. 2 is an exploded perspective view showing the detection system according to the present embodiment, FIG. 3 is a perspective view showing the detection system according to the present embodiment, and FIG. 4 is a detection according to the present embodiment. FIG. 5 is a plan view showing a base constituting the device fixing patch, FIG. 5 is a plan view showing the detection device fixing patch according to the present embodiment, and FIG. 6 shows the detection system according to the present embodiment. FIG.

  As shown in FIGS. 2 to 6, the detection system 13 includes a detection device 15 that detects the state of the pneumatic tire 1, and the detection device 15 is connected to the inner surface of the pneumatic tire 1 (that is, the inner liner 7 in the bead portion 3). ) To the detection device fixing patch 17.

  The detection device 15 measures the air pressure (internal pressure), internal temperature, wear, and the like of the compressed air filled in the pneumatic tire 1, and transmits a measurement result to the vehicle side by wireless communication. An electronic device 15A composed of an IC chip or the like that stores tire information (for example, name, date of manufacture, serial number, lot number) input by the manufacturer of the tire 1, and a casing 15B that protects the electronic device 15A And.

The casing 15B is made of a strong and hard material (Young's modulus of at least about 7030 kg / cm ² (about 100,000 psi)). The casing 15B is preferably filled with an epoxy resin or urethane in order to improve waterproofness.

  The housing 15B includes a protrusion 19 that is fixed to a locking hole 35 of a detection device fixing patch 17 that will be described later and protrudes toward the inside of the pneumatic tire 1, and a tongue portion of the detection device fixing patch 17 that will be described later. 33 has an insertion hole 21 through which insertion is possible. A flange portion 19A for fixing the tongue portion 33 of the detection device fixing patch 17 so as not to be detached is formed at the tip of the projection portion 19.

  The detection device fixing patch 17 includes a base portion 23 disposed on the inner surface of the pneumatic tire 1 and a holding portion 25 that holds the detection device 15 (housing 15B).

  The base portion 23 includes a base portion 23A that is fixed on the inner surface of the pneumatic tire 1 and a main body portion 23B that extends substantially orthogonally from the base portion 23A. In addition, substantially orthogonal shall show the range to 45-90 degree | times.

  The base 23 is formed of ethylene propylene diene monomer rubber (EPDM), butyl rubber, natural rubber, a mixture of neoprene rubber and natural rubber, a mixture of chlorobutyl rubber and natural rubber, a mixture of styrene butadiene rubber (SBR) and natural rubber, or the like. ing. In particular, the detection device fixing patch 17 is preferably a mixture of chlorobutyl rubber and natural rubber, or a mixture of styrene butadiene rubber (SBR) and natural rubber.

  The base portion 23A preferably has substantially the same radius (R) as the inner surface of the pneumatic tire 1 so as to be easily fixed to the inner surface (that is, the inner liner 7) of the pneumatic tire 1 (FIG. 6 ( c)).

  As shown in the figure, a housing hole 27 is formed on the upper surface of the main body portion 23B. The housing hole 27 can accommodate a mounting portion 31 constituting a holding portion 25 described later. Further, in the main body 23B, an insertion hole 29 into which a tongue 33 constituting the holding unit 25 described later can be inserted is formed from the accommodation hole 27 toward the outside of the main body 23B. The connecting portion between the base portion 23A and the main body portion 23B is inclined (I) to make it difficult for cracks and the like to occur.

  The holding portion 25 is fixed to the base portion 23 (that is, the accommodation hole 27), and can be placed on the placement portion 31 on which the detection device 15 (housing 15B) can be placed, and extends from the placement portion 31 and bends. And a pair of tongues 33 for fixing the detection device 15 by covering at least a part of the detection device 15.

  The placement portion 31 is formed of a hard material including at least one of urethane, epoxy, polyester-sterene resin, hard rubber composition, non-foaming compound, and the like.

  The tongue portion 33 is formed of the same material as the placement portion 31 described above. The tongue 33 is formed with a locking hole 35 that locks with the protrusion 19. The tongue 33 is preferably embedded with a fiber reinforced yarn (not shown).

(Detection device fixing method)
Next, a detection device fixing method will be described with reference to FIGS. 7 and 8 are diagrams for explaining the detection device fixing method according to the present embodiment. This detection device fixing method includes at least a (I) patch fixing step, (II) a detection device arrangement step, and (III) a device fixing step.

(I) Patch Fixing Step In the patch fixing step, a base 23 disposed on the inner surface of the pneumatic tire 1 and a detection device 15 (housing 15B) that is fixed to the base 23 and detects the state of the pneumatic tire 1 The detection device fixing patch 17 including the holding portion 25 for holding the tire is fixed to the inner surface of the pneumatic tire 1 (that is, the inner liner 7).

  Specifically, as shown in FIG. 7A, the base portion 23 (the base portion 23 </ b> A and the main body portion 23 </ b> B) is fixed to the inner surface of the pneumatic tire 1. More specifically, non-vulcanized cement (adhesive) is applied to the back surface of the base portion 23 opposite to the surface on which the main body portion 23B is formed, and the base portion 23 to which the non-vulcanized cement is applied is applied to the inner liner 7. Fix it. At this time, in order to increase the fixing strength of the detection device fixing patch 17, it is preferable to buff the portion (inner liner 7) where the base portion 23 is fixed.

  Next, as shown in FIG. 7B, the holding portion 25 is fixed to the base portion 23. More specifically, the holding portion 25 is obtained by inserting the tongue portion 33 into the insertion hole 29 formed in the main body portion 23B and accommodating the placement portion 31 in the accommodation hole 27 formed in the upper surface of the main body portion 23B. Is fixed to the base 23. At this time, in order to increase the fixing strength between the base portion 23 and the holding portion 25, non-vulcanized cement (adhesive) is applied to the accommodation hole 27 and placed in the accommodation hole 27 to which the non-vulcanized cement is applied. It is preferable to accommodate the part 31.

  In the patch fixing step, it is not always necessary to fix the holding portion 25 to the base portion 23 after fixing the base portion 23 to the inner surface of the pneumatic tire 1, and the base portion 23 is fixed to the pneumatic tire after the holding portion 25 is fixed to the base portion 23. You may fix to the inner surface of 1.

(II) Detection Device Arrangement Step In the detection device arrangement step, the detection device 15 is arranged between the tongues 33 extending from the placement portion 31 constituting the holding portion 25.

  Specifically, as shown in FIG. 8A, the detection device is inserted between a pair of tongue portions 33 by inserting the tongue portion 33 into the insertion hole 21 formed in the housing 15 </ b> B constituting the detection device 15. 15 and the detector 15 is placed on the placement portion 31.

(III) Device fixing step In the device fixing step, the tongue 33 is bent to cover at least a part of the detection device 15 (housing 15B), thereby fixing the detection device 15.

  Specifically, as shown in FIG. 8B, the tongue 33 inserted through the insertion hole 21 formed in the housing 15 </ b> B constituting the detection device 15 is bent and the detection device 15 (housing 15 </ b> B) is bent. The detection device 15 is fixed by covering at least a part. More specifically, the locking hole 35 in the tongue portion 33 is locked to the protruding portion 19 provided in the housing 15B, and the locking hole 35 is hooked on the flange portion 19A of the protruding portion 19 to be fixed.

  The flange portion 19A may be fixed to the tongue portion 33 by being deformed larger than the diameter of the locking hole 35 by melting (vulcanizing) at a high temperature in a state where the locking hole 35 is hooked. Further, it may be fixed with an adhesive or the like (for example, epoxy resin). Further, in order to increase the fixing strength between the detection device 15 and the detection device fixing patch 17, an adhesive or the like is applied to the contact portion between the detection device 15 (housing 15B) and the placement portion 31 or the tongue portion 33. May be.

  Here, in the detection device fixing method, the order is not necessarily (I) patch fixing step, (II) detection device arrangement step, and (III) device fixation step. For example, (II) detection device arrangement step, ( Of course, it may be the order of III) apparatus fixing step and (I) patch fixing step. The detection device fixing method includes (I) patch fixing step, II) detection device placement step, (III) device fixing step, (IV) fixing release step, and (V) new detection device fixing step. There may be.

(IV) Fixing Release Step In the fixing release step, the detection device 15 (housing 15B) and the holding unit 25 (tongue 33) are released from being fixed. For example, in the unlocking step, the flange portion 19A melted (vulcanized) at a high temperature and deformed to be larger than the diameter of the locking hole 35, or the flange portion 19A to which an adhesive or the like is applied, are cut off, thereby housing 15B. And the tongue 33 are released.

(V) New detection device fixing step After the fixing release step, in the new detection device fixing step, the new detection device 15 is fixed to the holding portion 25 by the fixing described above. That is, when only the detection device 15 fails, the detection device 15 that has failed in the above-described fixing release process can be removed, and a new detection device 15 is fixed.

(Action / Effect)
According to the detection device fixing patch 17, the pneumatic tire 1, and the detection device fixing method according to the present embodiment described above, the tongue 33 is bent to cover at least a part of the detection device 15 (housing 15 </ b> B). By fixing the detection device 15 in this manner, the deformation transmitted directly from the inner liner 7 such as deformation of the pneumatic tire 1 and deformation due to the centrifugal force of the detection device 15 during rotation is absorbed by the base 23 being deformed. Can do.

  Thereby, fatigue, stress, strain, impact, vibration, etc. of the detection device fixing patch 17 can be minimized, and failure of the detection system 13 (the detection device 15 and the detection device fixing patch 17) can be reduced. In addition, even when the pneumatic tire 1 cannot be used, the detection device 15 and the detection device fixing patch 17 can be reused.

  In addition, when only the detection device 15 breaks down, the detection device 15 (housing 15B) and the tongue 33 can be released from the fixed state so that the failed detection device 15 can be removed. The device 15 can be fixed.

  Further, since the holding portion 25 is formed of the hard material, the detection device 15 can be protected, and the detection device 15 can be securely fixed to the base portion 23 via the holding portion 25.

  Further, since the fiber 33 is embedded in the tongue 33, the rigidity of the tongue 33 can be increased, so that the durability of the tongue 33 can be improved. It is possible to extend the life of the patch 17 itself.

  Further, the detection device fixing patch 17 is fixed to an inner surface (that is, the inner liner 7) of the pneumatic tire 1 molded in advance, so that the detection device fixing patch 17 is attached to a used pneumatic tire or a commercially available pneumatic tire. It becomes possible.

(Modification)
Although it has been described that the tongue 33 constituting the detection device fixing patch 17 according to the above-described embodiment is formed with the locking hole 35 that locks with the protrusion 19, the following modification is made. May be. In addition, the same code | symbol is attached | subjected to the same part as the detection apparatus fixing patch 17 which concerns on embodiment mentioned above, and a different part is mainly demonstrated.

  Fig.9 (a) is a perspective view which shows the detection system which concerns on a modification, FIG.9 (b) is a front view (G arrow line view of Fig.9 (a)) which shows the detection system which concerns on a modification. is there.

  As shown in FIG. 9, a claw portion 37 that extends substantially orthogonally from the tongue portion 33 is provided at the tip of the pair of tongue portions 33. That is, the casing 15B constituting the detection device 15 is not provided with a protrusion, and the tongue 33 is not formed with a locking hole.

  That is, the tongue 33 is bent to cover the side surface of the detection device 15 (housing 15B), and the claw portion 37 is caught in the insertion hole 21 formed in the housing 15B (detection device 15) to fix the detection device 15. can do.

[Other embodiments]
As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention.

  Specifically, the tongue portion 33 has been described as a pair, but is not limited thereto. For example, as shown in FIG. Of course, the number may be one when it is a hard material capable of eliminating the deviation from the mounting portion 31.

  Moreover, although the tongue part 33 was demonstrated as what fixes the detection apparatus 15 by inserting the insertion hole 21 formed in the housing | casing 15B which comprises the detection apparatus 15, it is not limited to this, For example, As shown in FIG. 11, the housing 15B in which no insertion hole is formed may be fixed.

  That is, in the detection device 15 and the detection device fixing patch 17, it is only necessary that the detection device can be fixed by folding the tongue 33 and covering at least a part of the detection device 15.

  Further, the detection system 13 (the detection device 15 and the detection device fixing patch 17) has been described as being fixed to the inner liner 7 in the bead portion 3. However, the present invention is not limited to this. For example, FIG. As shown, the tread portion 9 and the plurality of belt layers 11 may be fixed to the inner liner 7 on the inner side in the tire radial direction.

  Further, the detection device fixing patch 17 has been described as being fixed to the inner surface (that is, the inner liner 7) of the pre-molded pneumatic tire 1. However, the present invention is not limited to this, and the pneumatic tire 1 It may be provided on the inner surface of the pneumatic tire 1 at the time of molding.

  Furthermore, although the pneumatic tire 1 has been described as a truck / bus radial tire (TBR), the pneumatic tire 1 is not limited thereto. For example, the pneumatic tire 1 is an off-the-road radial tire (ORR) used for heavy loads. Of course, it may be a general radial tire for a passenger car, a bias tire, or the like.

  From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

It is a tread width direction sectional view showing the pneumatic tire concerning this embodiment. It is a disassembled perspective view which shows the detection system which concerns on this Embodiment. It is a perspective view which shows the detection system which concerns on this Embodiment. It is a top view which shows the base which comprises the patch for a detection device fixing concerning this Embodiment. It is a top view which shows the patch for a detection apparatus fixing concerning this Embodiment. It is a top view which shows the detection system which concerns on this Embodiment. It is a figure for demonstrating the detection apparatus fixing method which concerns on this Embodiment (the 1). It is a figure for demonstrating the detection apparatus fixing method which concerns on this Embodiment (the 2). It is a figure which shows the detection apparatus fixing patch which concerns on a modification. It is a top view which shows the detection system which concerns on other embodiment. It is a perspective view which shows the detection system which concerns on other embodiment. It is a tread width direction sectional view showing a pneumatic tire concerning other embodiments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pneumatic tire, 3 ... Bead part, 5 ... Carcass layer, 7 ... Inner liner, 9 ... Tread part, 11 ... Belt layer, 13 ... Detection system, 15 ... Detection apparatus, 15A ... Electronic device, 15B ... Housing , 17 ... Detection device fixing patch, 19 ... Projection part, 19A ... Flange part, 21 ... Insertion hole, 23 ... Base part, 23A ... Base part, 23B ... Body part, 25 ... Holding part, 27 ... Housing hole, 29 ... Insertion hole, 31 ... placement part, 33 ... tongue part, 35 ... locking hole, 37 ... claw part

Claims (8)

A detection device fixing patch for fixing a detection device for detecting the state of the tire to the inner surface of the tire,
A base disposed on the inner surface of the tire;
A holding unit for holding the detection device,
The holding part is fixed to the base part, and is detected by mounting the mounting part on which the detection apparatus is mounted, and extending from the mounting part and bending and covering at least a part of the detection apparatus. A detection device fixing patch comprising a tongue portion for fixing the device.   The detection device fixing patch according to claim 1, wherein the holding portion includes at least one of urethane, epoxy, polyester-sterene resin, a hard rubber composition, and a non-foaming compound.   The detection device fixing patch according to claim 1, wherein a fiber reinforced yarn is embedded in the tongue portion. The detection device has a protrusion protruding toward the inside of the tire,
The detection device fixing patch according to any one of claims 1 to 3, wherein a locking hole for locking with the protrusion is formed in the tongue. The base portion includes a base portion fixed on the inner surface of the tire, and a main body portion extending substantially orthogonally from the base portion,
The said main-body part is formed with the accommodation hole which can accommodate the said mounting part, and the penetration hole which the said tongue part can penetrate, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Patch for fixing the detection device according to 1. A tire provided with a detection system comprising a detection device for detecting a state of a tire and a detection device fixing patch for fixing the detection device to an inner surface of the tire,
The detection device fixing patch includes a base portion disposed on an inner surface of the tire, and a holding portion that holds the detection device,
The holding unit is fixed to the base and can be mounted with the mounting unit, and extends from the mounting unit and is bent to cover at least a part of the detection device to fix the detection device. A tire comprising a tongue portion. A patch fixing step of fixing a detection device fixing patch to the inner surface of the tire, comprising: a base portion disposed on the inner surface of the tire; and a holding portion that holds a detection device that detects the state of the tire;
A detecting device arranging step of arranging the detecting device between tongue portions extending from the placing portion constituting the holding portion;
A detection device fixing method comprising: a device fixing step of fixing the detection device by folding at least a part of the detection device by bending the tongue portion. A fixing release step for releasing the fixing between the detection device and the holding unit;
The detection device fixing method according to claim 7, further comprising a new detection device fixing step of fixing a new detection device to the holding portion.

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