Detector for track transfer device

Abstract

To provide a detector for track transfer device capable of being installed easily.SOLUTION: A detector for track transfer device includes an adjustment mechanism unit including; an attachment block 23 (attachment member) formed in L shape; two attachment holes 28, 29 (first attachment holes) formed on a stationary unit 25 of the attachment block 23; five attachment holes 64-64 (second attachment holes) formed on a first link member 61; and two bolts 27, 27 inserted into the attachment holes 28, 29 and the selected attachment holes 64, 64. Thus, arm height is capable of being adjusted in six steps without using a spacer and installation work is facilitated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a detector for use in an interceptor device installed between a main line and a siding. [Background technology]

[0002] Patent Document 1 discloses a detector (see FIG. 4 in Patent Document 1) used in a cross-taking device that opens the gap between a main line rail and a siding rail. The detector for the cross-taking device described in Patent Document 1 (hereinafter referred to as the "conventional detector") has a detection lever 5 having a first arm 5a and a second arm 5b that form a fixed angle, which is supported by a bracket 5d so as to be rotatable about a rotation axis 5c. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-116272 A Summary of the Invention [Problem to be solved by the invention]

[0004] With conventional detectors, if the movable rail locking height (the height from the sleeper to the bottom end of the movable rail in the stored state) exceeded a specified height (for example, 113 mm), one or more spacers (plates) had to be inserted between the detector and the sleeper, which resulted in an increase in the number of parts.

[0005] Furthermore, conventional detectors have two adjustment points during installation, and the adjustment work using tools is cumbersome. The first adjustment is the height adjustment from the mounting surface (or "top surface of the sleeper" if a spacer is not required) to the top end position of the adjustment bolt attached to the first arm 5a, and the second adjustment is the protruding length of the detection shaft.

[0006] In conventional detectors, the above-mentioned adjustment of the protruding length of the detection shaft is performed by removing the peep plug attached to the rear end of the detection unit (the end opposite to the side where the detection shaft protrudes), so the cable needs to be pulled out from the side (right or left side) of the detection unit. Therefore, when changing the cable pull-out direction, the detection unit needs to be removed from the mounting base and reassembled, which makes the installation work complicated.

[0007] Furthermore, in conventional detectors, the detection unit is supported on the mounting base in a cantilever manner, so there is a risk that the toothed washer interposed between the detection unit and the mounting base or the mounting bracket of the limit switch housed inside the housing of the detection unit may be damaged by train vibrations. Also, in conventional detectors, there is a risk that rainwater may seep into the detection unit, causing problems such as sticking of the sliding part or poor contact of the electrical contacts.

[0008] An object of the present invention is to provide a detector for a stealing device that is easy to install. [Means for solving the problem]

[0009] The detector for a cross-taking device of the present invention is a detector used in a cross-taking device installed between a main line and a drop line, and comprises: a mounting base, a housing provided on the mounting base, a detection member that is pushed downward by a locked cross-taking member, a mounting member to which the detection member is attached, a detection shaft that is supported by the housing so as to be slidable in the forward and backward directions and whose front end protrudes from the front surface of the housing, and a link mechanism that converts the movement of the detection member into linear movement in the forward and backward directions of the detection shaft, wherein the link mechanism has a first link member having a front end to which the mounting member is attached and a rear end connected to a first hinge portion provided on the front surface of the housing, and a second link member having a front end connected to the first link member via a second hinge portion and a rear end connected to the front end of the detection shaft via a third hinge portion, and has an adjustment mechanism for adjusting the mounting height of the mounting member relative to the first link member. Effect of the Invention

[0010] According to the present invention, it is possible to provide a detector for a stealing device that is easy to install. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a left side view of the detector for the interception device according to the embodiment. [Diagram 2] FIG. 2 is a plan view of a detector for a stealing device according to the present embodiment. [Diagram 3] FIG. 13 is an explanatory diagram of the embodiment, showing a state in which the adjustment bolt is pressed down by the movable rail. [Figure 4] FIG. 2 is an explanatory diagram of the present embodiment, and is a cross-sectional view taken along a vertical plane including the center line of the detection axis in an unlocked state. [Diagram 5] FIG. 2 is an explanatory diagram of the present embodiment, and is a cross-sectional view taken along a vertical plane including the center line of the detection axis in a locked state. [Figure 6] FIG. 2 is an explanatory diagram of the present embodiment, showing a state in which the housing is fixed to the mounting base by four bolts. [Figure 7] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the state in which the arm height is at its highest. [Figure 8] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the second highest arm height state. [Figure 9] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the arm height in the third highest state. [Figure 10] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the fourth highest arm height state. [Figure 11] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the fifth highest arm height state. [Figure 12] FIG. 13 is an explanatory diagram of the adjustment mechanism, showing the state in which the arm height is at its lowest. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An embodiment of the present invention will now be described with reference to the accompanying drawings. Here, the intercepting device is a device that opens the gap between the main line rail and the siding rail, and is equipped with three sets of movable rails (intercepting rails) installed at three locations where the main line rail and the siding rail intersect. In this embodiment, a detector 1 for the intercepting device (hereinafter referred to as "detector 1") that detects the state in which the movable rail 2 is locked (stored) (see FIG. 3, hereinafter referred to as "locked state") will be described. For convenience, the "left side" and "right side" in FIG. 1 and FIG. 2 are defined as the "front side" and "rear side", the "upper side" and "lower side" in FIG. 1 are defined as the "upper side" and "lower side", and the "lower side" and "upper side" in FIG. 2 are defined as the "left side" and "right side".

[0013] As shown in FIG. 1 or FIG. 2, the detector 1 has a mounting base 3 fixed to the upper surface of a sleeper (not shown) using bolts (e.g., "coach bolts", not shown), and a housing 11 fixed to the upper surface 4 of the mounting base 3 using four bolts 6 ("hexagon socket head countersunk bolts" in this embodiment). As shown in FIG. 6, the heads of the bolts 6 are received in countersunk portions 7 formed in the lower surface 5 of the mounting base 3. The mounting base 3 has a plurality of bolt insertion holes 8 (four circular holes and two oval holes in this embodiment) for inserting bolts for fixing to the sleeper. Note that the mounting base 3 can be attached to a sleeper without being limited to the sleeper.

[0014] As shown in FIG. 1 or FIG. 2, the detector 1 has an adjustment bolt 21 (detection member) that is pushed downward by a locked movable rail 2 (see FIG. 3), and a mounting block 23 (mounting member) to which the adjustment bolt 21 is attached. The mounting block 23 has an arm portion 24 formed in an L shape and having a hole (reference numeral omitted) formed at the tip for inserting the adjustment bolt 21, and a fixing portion 25 that is fixed to a first link member 61 described later. The fixing portion 25 has a groove portion 26 that is formed in a U-shape in cross section in a horizontal plane and extends in the vertical direction and opens toward the rear. The fixing portion 25 has two mounting holes 28, 29 (first mounting holes) that are arranged with a gap A (see FIG. 3) in the vertical direction and through which a bolt 27 for fixing the mounting block 23 to the first link member 61 is inserted.

[0015] 4, the detector 1 has a detection shaft 31 that is inserted into a shaft hole 32 formed in the lower part of the housing 11. The shaft hole 32 extends in the front-rear direction, and its front end opens to the front surface 13 of the housing 11. The detection shaft 31 has a sliding portion 34 that is slidably supported by a pair of bearings 33, 33 (bushes) that are fitted into the shaft hole 32 with a gap between them in the front-rear direction. The sliding portion 34 is in sliding contact with a ring-shaped packing 35 that is attached to the front end of the shaft hole 32.

[0016] The shaft hole 32 has an annular groove 36 filled with grease to be applied to the sliding portion 34 of the detection shaft 31. The annular groove 36 is formed between a pair of bearings 33, 33 of the shaft hole 32, and is supplied with grease injected from a grease nipple 37 provided inside the housing 11. The detection shaft 31 has a sensor dog portion 38 formed at the rear end of the sliding portion 34. The sensor dog portion 38 has a cylindrical large diameter portion 39, a reduced diameter portion 40 connected to the rear end of the large diameter portion 39 and reduced in diameter toward the rear, and a small diameter portion 41 connected to the rear end of the reduced diameter portion 40.

[0017] The detection shaft 31 has a flange portion 42 formed on the periphery of the rear end of the sensor dog portion 38 (small diameter portion 41). The flange portion 42 receives the front end of a compression coil spring 43 that urges the detection shaft 31 forward. A protrusion 44 is formed in the center of the rear end of the detection shaft 31 to position the front end of the compression coil spring 43 in the radial direction. The rear end of the compression coil spring 43 is received by a spring receiving portion 45 attached to the lower part of the rear surface 14 of the housing 11. The detection shaft 31 is positioned in the front-rear direction (axial direction) by abutting a front end face 46 of the large diameter portion 39 against a bottom surface 47 of an annular recess formed on the periphery of the rear end of the shaft hole 32.

[0018] A limit switch 51 is housed inside the housing 11. The limit switch 51 is fixed to a sensor base 55, whose front-rear end portions are fixed to the housing 11 by bolts 56, 56. The limit switch 51 has an arm 52 and a roller 53. In the limit switch 51 in an unlocked state (see FIG. 4), the roller 53 abuts against the reduced diameter portion 40 of the sensor dog portion 38, and the switch is turned OFF. In the limit switch 51 in a locked state (see FIG. 5), that is, when the adjustment bolt 21 is pushed in by the movable rail 2 and the detection shaft 31 moves rearward, the arm 52 rotates in the process of the roller 53 abutting against the large diameter portion 39 of the sensor dog portion 38, and the switch is turned ON.

[0019] The detection shaft 31 has an annular adjustment target line 48 formed at a certain distance from the front surface 13 of the housing 11 in the unlocked state (see FIG. 4), i.e., in a state in which an end face 46 of the large diameter portion 39 abuts against a bottom surface 47 of an annular recess formed in the housing 11. As shown in FIG. 5, the detector 1 is configured so that the adjustment target line 48 of the detection shaft 31 coincides with a vertical plane including the front surface 13 of the housing 11 in the locked state (see FIG. 5), i.e., in a state in which the adjustment bolt 21 is pushed in by the movable rail 2 (see FIG. 3).

[0020] As shown in FIG. 1 or FIG. 2, the detector 1 has a link mechanism 60 that converts the rotational (pivotal) motion of the adjustment bolt 21 about a fulcrum P1 (see FIG. 3) into linear motion of the detection shaft 31 in the front-rear direction (axial direction). The link mechanism 60 has a first link member 61 to which the fixing portion 25 of the mounting block 23 (mounting member) is fixed. The first link member 61 has a rear end portion 63 connected to a first hinge portion 67 provided on an upper portion of the front surface 13 of the housing 11. The first hinge portion 67 is formed in a U-shape in a plan view (see FIG. 2), and supports both ends of a connecting pin 69 (a "stripper bolt" in this embodiment) that penetrates the rear end portion 63 of the first link member 61 inserted into a groove portion 68 in the left-right direction (the "up-down direction" in FIG. 2).

[0021] The link mechanism 60 has a second link member 73 to which the first link member 61 is connected at a hinge portion 74 (second hinge portion) formed at the front end portion. At the rear end portion of the second link member 73, a hinge portion 77 (third hinge portion) is formed to which the two-face width portion 49 formed at the front end portion (portion protruding from the front surface 13 of the housing 11) of the detection shaft 31 is connected. The hinge portion 74 is formed in a U-shape in a plan view, and supports both ends of a connecting pin 76 (in this embodiment, a "stripper bolt") that penetrates the first link member 61 inserted in the groove portion 75 in the left-right direction. The hinge portion 77 is formed in a U-shape in a plan view, and supports both ends of a connecting pin 79 (in this embodiment, a "stripper bolt") that penetrates the two-face width portion 49 of the detection shaft 31 inserted in the groove portion 78 in the left-right direction. The three connecting pins 69, 76, 79 are parallel to a horizontal line perpendicular to the center line of the detection axis 31 and are disposed so as to form a triangle in a side view (see FIG. 1).

[0022] As shown in FIG. 1 or FIG. 2, the front end 62 of the first link member 60 is inserted into the groove 26 formed in the fixed portion 25 of the mounting block 23. The front end 62 of the first link member 60 has a plurality of (five in this embodiment) mounting holes 64 (second mounting holes) arranged at regular intervals in the vertical direction. Bolts 27, 27 inserted into mounting holes 28, 29 (first mounting holes) formed in the fixed portion 25 of the mounting block 23 are inserted into two selected mounting holes 64, 64 (the first mounting hole 64 from the top in FIG. 1 and the third mounting hole 64 from the top). An interval B (see FIG. 3) between adjacent mounting holes 64, 64 of the multiple mounting holes 64 is set to 1 / 2 of an interval A between the mounting holes 28, 29.

[0023] The detector 1 has an adjustment mechanism for adjusting a height H3 (see Figs. 7 and 10, hereinafter referred to as "arm height H3") from the lower surface 5 of the mounting base 3 to the upward surface of the arm portion 24 of the mounting block 23 (mounting member), and further, an adjustment mechanism for adjusting an initial height H0 (see Fig. 7) of the adjustment bolt 21 (detection member) from the lower surface 5 of the mounting base 3. The adjustment mechanism in this embodiment includes the mounting block 23 (mounting member) formed in an L shape, two mounting holes 28, 29 (first mounting holes) formed in the fixed portion 25 of the mounting block 23, five mounting holes 64-64 (second mounting holes) formed in the first link member 61, and two bolts 27, 27 inserted into the mounting holes 28, 29 and the selected mounting holes 64, 64.

[0024] As shown in Fig. 1, an elbow-type cable gland 16 is attached to the upper part of the rear wall 15 of the housing 11. A cable 54 extending from the limit switch 51 is inserted into the cable gland 16. The cable 54 is extended from the main body of the limit switch 51 to the outside of the housing 11 via a cable gland 17 (see Fig. 4) attached inside the housing 11 and the cable gland 16. The cable glands 16, 17 are waterproof.

[0025] Next, the procedure for installing the above-mentioned detector 1 will be described. First, the movable rail locking height H1 (see FIG. 3) is measured, and the installation location of the detector 1 is selected. Next, the arm height H3 (see FIG. 7 and FIG. 10) of the detector 1 is adjusted according to the measured movable rail locking height H1. In this embodiment, as shown in FIG. 7 to FIG. 12, the arm height H3 can be adjusted to six stages without using a spacer inserted between the mounting base 3 (mounting member) and the sleeper.

[0026] 7 to 9, the mounting block 23 is attached to the front end 62 of the first link member 61 so that the arm portion 24 extends forward from the upper end of the fixed portion 25. On the other hand, in the embodiment shown in Figures 10 to 12, the mounting block 23 is attached to the front end 62 of the first link member 61 so that the arm portion 24 extends forward from the lower end of the fixed portion 25. In other words, the orientation of the mounting block 23 shown in Figures 7 to 9 and the orientation of the mounting block 23 shown in Figures 10 to 12 are upside down.

[0027] 7, one bolt 27 is inserted through the upper mounting hole 28 (first mounting hole) of the mounting block 23 and the first mounting hole 64 (second mounting hole) from the top of the first link member 61, and the other bolt 27 is inserted through the lower mounting hole 29 (first mounting hole) of the mounting block 23 and the third mounting hole 64 (second mounting hole) from the top of the first link member 61. In the embodiment shown in Fig. 7, the arm height H3 is adjusted to the highest height.

[0028] In the embodiment shown in Fig. 8, one bolt 27 is inserted through the upper mounting hole 28 of the mounting block 23 and the second mounting hole 64 from the top of the first link member 61, while the other bolt 27 is inserted through the lower mounting hole 29 of the mounting block 23 and the fourth mounting hole 64 from the top of the first link member 61. In the embodiment shown in Fig. 9, one bolt 27 is inserted through the upper mounting hole 28 of the mounting block 23 and the third mounting hole 64 from the top of the first link member 61, while the other bolt 27 is inserted through the lower mounting hole 29 of the mounting block 23 and the fifth mounting hole 64 from the top of the first link member 61.

[0029] 10, one bolt 27 is inserted through the upper mounting hole 29 of the mounting block 23 and the first mounting hole 64 from the top of the first link member 61, while the other bolt 27 is inserted through the lower mounting hole 28 of the mounting block 23 and the third mounting hole 64 from the top of the first link member 61. In the embodiment shown in Fig. 11, one bolt 27 is inserted through the upper mounting hole 29 of the mounting block 23 and the second mounting hole 64 from the top of the first link member 61, while the other bolt 27 is inserted through the lower mounting hole 28 of the mounting block 23 and the fourth mounting hole 64 from the top of the first link member 61.

[0030] 12, one bolt 27 is inserted through the upper mounting hole 29 of the mounting block 23 and the third mounting hole 64 from the top of the first link member 61, and the other bolt 27 is inserted through the lower mounting hole 28 of the mounting block 23 and the fifth mounting hole 64 from the top of the first link member 61. In the embodiment shown in Fig. 12, the arm height H3 is adjusted to the lowest height.

[0031] Next, in the locked state, i.e., when the adjustment bolt 21 is pushed in by the movable rail 2 (see FIG. 3), the protruding height of the adjustment bolt 21 from the upwardly facing surface of the arm portion 24 is adjusted so that the adjustment target line 48 of the detection axis 31 coincides with the front surface 13 of the housing 11. Next, the mounting base 3 is fixed to the sleeper with four bolts (e.g., "coach bolts", not shown). Next, the laid cable is connected to the control unit (not shown).

[0032] The above-described embodiment provides the following advantages. With conventional detectors, if the movable rail locking height exceeds a preset height, one or more spacers must be inserted between the detector and the sleeper, which increases the number of parts. Also, coach bolts of different lengths must be prepared to accommodate the number of spacers to be inserted, which makes installation work complicated.

[0033] In contrast, the present embodiment is provided with an L-shaped mounting block 23 (mounting member), two mounting holes 28, 29 (first mounting holes) formed in the fixed portion 25 of the mounting block 23, five mounting holes 64-64 (second mounting holes) formed in the first link member 61, and an adjustment mechanism including two bolts 27, 27 inserted into the mounting holes 28, 29 and the selected mounting holes 64, 64.

[0034] According to this embodiment, the arm height H3 can be adjusted to six levels by selecting the mounting direction of the mounting block 23 relative to the first link member 61, i.e., whether the arm portion 24 extends forward from the upper end of the fixed portion 25 or the lower end of the fixed portion 25, and further selecting a pair of mounting holes 64, 64 through which the bolts 27, 27 are inserted. In this embodiment, a spacer to be inserted between the mounting base 3 (mounting member) and the sleeper is not required, and the number of parts can be reduced and the weight including the spacer can be reduced. Furthermore, since the spacer is not required, the length of the coach bolt to be prepared is determined in advance, making the installation work easier.

[0035] Furthermore, with conventional detectors, it was necessary to measure the protruding length of the detection axis with a ruler or the like and then use a tool to adjust it to a predetermined protruding length, making the adjustment process complicated.

[0036] In contrast, in this embodiment, the end face 46 of the large diameter portion 39 of the detection shaft 31 is abutted against the bottom face 47 of the annular recess formed in the shaft hole 32, thereby making the protruding length of the detection shaft 31 from the housing 11 constant, and therefore the only adjustment required is the protruding height of the adjustment bolt 21 from the upward facing surface of the arm portion 24. Also, the protruding length of the adjustment bolt 21 can be adjusted so that the adjustment target line 48 formed on the detection shaft 31 coincides with the front surface 13 of the housing 11 in the locked state, i.e., when the adjustment bolt 21 is pressed in by the movable rail 2, so that the adjustment is easy and the adjustment work can be made more efficient.

[0037] In addition, in conventional detectors, the protruding length of the detection shaft is adjusted by removing the peep plug and then rotating the detection shaft using a tool such as a flathead screwdriver, which makes the installation process complicated. Also, since the peep plug is attached to the center of the rear end of the detection unit, the cable needs to be pulled out from the side of the detection unit. Therefore, when changing the cable pull-out direction, it is necessary to remove the detection unit from the mounting base, change the cable pull-out direction, and then reassemble the detection unit to the mounting base, which makes the installation process complicated.

[0038] In contrast, in this embodiment, as described above, the protruding length of the detection shaft 31 is fixed, so that it is possible to eliminate the need to adjust the protruding length of the detection shaft 31. Also, in this embodiment, there is no need for a peep plug to be removed when adjusting the protruding length of the detection shaft 31, so the cable 54 can be pulled out from the rear surface 14 of the housing 11. Furthermore, an elbow-type cable gland 16 is used to pull the cable 54 out of the housing 11, so that the pulling direction of the cable 54 can be easily changed.

[0039] In addition, in conventional detectors, the detection unit was supported on the mounting base in a cantilever manner, so there was a risk that the toothed washer interposed between the detection unit and the mounting base would be damaged by train vibrations, or that the mounting bracket (base) of the limit switch housed inside the detection unit housing would be damaged.

[0040] In contrast, in this embodiment, the housing 11 is firmly fixed to the mounting base 3 with four bolts 6 (hexagon socket head countersunk bolts), so the use of toothed washers can be eliminated. Also, in this embodiment, the limit switch mounting bracket manufactured by bending a thin plate into an L shape is eliminated, and the limit switch 51 is attached to the sensor base 55 made of a relatively thick flat plate, so that it is possible to prevent the base of the limit switch 55 from being damaged by train vibrations, and the reliability of the detector 1 can be improved.

[0041] Furthermore, in conventional detectors, there was a risk that rainwater would seep into the detection section, causing problems such as sticking of the sliding parts or poor contact of the electrical contacts.

[0042] In contrast, in this embodiment, the cable gland 16 provided on the outside of the rear wall portion 15 of the housing 11 and the cable gland 17 provided on the inside are used to doubly prevent rainwater from entering the inside of the housing 11 from the outside, so that it is possible to significantly improve the sealing performance between the housing 11 and the cable, and to avoid problems such as poor electrical contact. Also, in this embodiment, the gap between the detection shaft 31 and the shaft hole 32 is sealed with a packing 35, and an annular groove 36 for supplying grease to the sliding portion 34 of the detection shaft 31 is formed in the shaft hole 32 of the housing 11, so that it is possible to prevent the sliding portion 34 from sticking due to the intrusion of rainwater, and the reliability of the operation of the detector 1 can be ensured.

[0043] The embodiment is not limited to the above-described form, and can be configured as follows, for example. The multiple (five in this embodiment) second mounting holes 64-64 formed in the first link member 61 can be a series of oval holes 64 extending in the vertical direction. In this case, it becomes possible to adjust the arm height H3 steplessly within the range from the upper end to the lower end of the hole 64. [Explanation of symbols]

[0044] 1 detector, 3 mounting base, 11 housing, 13 front surface (of housing), 21 adjustment bolt (detection member), 23 mounting block (mounting member), 60 link mechanism, 61 first link member, 67 first hinge portion, 73 second link member, 74 hinge portion (second hinge portion), 77 hinge portion (third hinge portion)

Claims

1. A detector used in a stealing device installed between a main line and a siding, A mounting base and A housing provided on the mounting base; a detection member that is pushed downward by a locked interceptor member; a mounting member to which the detection member is attached; a detection shaft supported by the housing so as to be slidable in a front-rear direction and having a front end protruding from a front surface of the housing; a link mechanism for converting the motion of the detection member into a linear motion in the forward and backward directions of the detection axis, The link mechanism includes: a first link member having a front end to which the mounting member is attached and a rear end to which a first hinge portion provided on the front surface of the housing is connected; a second link member having a front end portion connected to the first link member via a second hinge portion and a rear end portion connected to the front end portion of the detection shaft via a third hinge portion; 4. A detector for a stealing device, comprising: an adjustment mechanism for adjusting a mounting height of the mounting member relative to the first link member.

2. 2. A detector for a stealing device according to claim 1, The adjustment mechanism includes: a first attachment hole formed in the attachment member and through which a bolt for fixing the attachment member to the first link member is inserted; a second mounting hole formed in the first link member, through which a bolt inserted into the first mounting hole is inserted; A detector for a stealing device, characterized in that the first link member has second mounting holes, the number of which is greater than the number of the first mounting holes, spaced apart in the vertical direction.

3. 2. A detector for a stealing device according to claim 1, The adjustment mechanism includes: a first attachment hole formed in the attachment member and through which a bolt for fixing the attachment member to the first link member is inserted; a second mounting hole formed in the first link member, through which a bolt inserted into the first mounting hole is inserted; The detector for a stealing device, wherein the second mounting hole is formed in an elliptical shape extending in the vertical direction.

4. A detector for a stealing device according to claim 2 or 3, The mounting member has a fixing portion extending in the vertical direction and in which the first mounting hole is formed, and an arm portion extending forward from an upper end or a lower end of the fixing portion and having a front end to which the detection member is fixed.

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