Mirror mounting device

Abstract

Provided is a mirror mounting device capable of stably supporting a mirror on a curved rod-shaped portion of an armrest. A mirror attachment device (11A) for attaching a mirror (12) to an armrest (10) having a curved rod-shaped section (10a), the mirror attachment device (11A) being provided with: a spacer (15) in which a plurality of spacer pieces (16) having engagement recesses (16a) that engage with the rod-shaped section (10a) are combined; and an arm (20) that supports the mirror (12), the arm (20) having a clamping part (23) that clamps the rod-shaped part (10a) with the spacer (15) therebetween.

Description

Technical Field

[0001] The present invention relates to a reflector mounting device for mounting a reflector on a handrail having a bent rod-shaped portion. Background Art

[0002] As a working machine, for example, in a hydraulic excavator, a cab is generally provided on the left side of the front part of the upper rotating body. A door for opening and closing the access port for the operator to get on and off the vehicle is installed on the left side of the cab. In addition, near the door of the cab, a handrail is installed along the front pillar so that it can be used as a handrail when the operator gets on and off the vehicle through the access port. Moreover, on the left side of the cab, a reflector for ensuring the rear and side vision is arranged to extend to the left side of the cab via a reflector mounting device.

[0003] As such a reflector mounting device, patent document 1 discloses a reflector mounting device of the following structure, which comprises: a supporting arm portion having a reflector mounted in the middle portion and formed in a ring shape; and a clamping member which is rotatably engaged with a straightly extending rod-shaped portion in the handrail and can adjust the clamping force, and at least one end of the two ends of the supporting arm portion which can be rotated relative to the handrail is connected to the clamping member.

[0004] According to the reflector mounting device disclosed in Patent Document 1, by adjusting the clamping force of the clamp on the rod-shaped portion of the armrest, the support arm portion will not rotate relative to the armrest due to vibration, impact, etc. during operation, and on the other hand, the operator can hold the support arm portion to perform the rotation operation.

[0005] [Prior technical literature]

[0006] [Patent Literature]

[0007] Patent Document 1: Japanese Patent Application Publication No. 2010-95185 Summary of the invention

[0008] Problems to be solved by the invention

[0009] In recent years, the cab of the working machine has been designed to be generally round. Therefore, the front pillar is formed into a curved shape that bulges forward, and the armrest is also formed into a curved shape that bulges forward at the rod-shaped portion between the mounting portions at both ends.

[0010] In the reflector mounting device disclosed in Patent Document 1, a clamping surface portion of the clamp that clamps the armrest is formed in a shape suitable for clamping a straightly extending rod-shaped portion of the armrest.

[0011] When the reflector mounting device disclosed in Patent Document 1 is used as a reflector mounting device for mounting a reflector on a handrail having a curved rod-shaped portion, the curved rod-shaped portion is clamped by a clamping surface portion adapted to clamp the straightly extending rod-shaped portion. Therefore, the friction engagement between the rod-shaped portion and the clamp is insufficient, and in a working machine such as a hydraulic excavator that is often subjected to strong vibration, a problem occurs in that the reflector cannot be stably supported on the handrail.

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a reflector mounting device capable of stably supporting a reflector on a curved rod-shaped portion of an armrest.

[0013] Solutions to Solve Problems

[0014] The characteristic structure of the reflector mounting device according to the present invention for solving the above-mentioned problems is as follows:

[0015] The reflector mounting device is used to mount a reflector on a handrail having a curved rod-shaped portion, wherein:

[0016] The reflector mounting device comprises:

[0017] a spacer comprising a plurality of spacer sheets, each spacer sheet having an engaging recessed portion engaged with the rod-shaped portion; and

[0018] an arm supporting the reflector,

[0019] The arm includes a clamping portion that clamps the rod-shaped portion via the spacer.

[0020] According to the reflector mounting device of this structure, the arm supporting the reflector has a clamping portion that clamps the curved rod-shaped portion in the armrest through a spacer. The spacer is composed of a plurality of spacers, each of which has a clamping recess that is engaged with the curved rod-shaped portion, and the surface of the engaging recess in the spacer functions as a clamping surface suitable for clamping the curved rod-shaped portion. Thus, the spacer is frictionally engaged along the shape of the curved rod-shaped portion in the armrest by the clamping force from the clamping portion. Therefore, the reflector can be stably supported on the curved rod-shaped portion in the armrest, which is particularly effective in working machines such as hydraulic excavators that are often subjected to strong vibrations.

[0021] In the reflector mounting device according to the present invention, it is preferred that:

[0022] The clamping portion includes a bushing that is in sliding contact with the spacer.

[0023] According to the reflector mounting device of this structure, by applying a certain rotational force or more to the arm, the arm can be smoothly rotated at the sliding contact portion between the spacer and the bushing, so that the reflector can be easily extended to a position suitable for use or stored in a manner that does not become an obstacle during movement.

[0024] In the reflector mounting device according to the present invention, it is preferred that:

[0025] The bushing is configured to be relatively displaceable around the spacer.

[0026] According to the reflector mounting device of this structure, when the rod-shaped portion of the handrail is clamped via a spacer, the relative position between the spacer and the bushing can be adjusted based on the bushing that can be relatively displaced around the spacer, so the positional offset between the spacer and the rod-shaped portion can be corrected, thereby reliably clamping the rod-shaped portion via the spacer.

[0027] In the reflector mounting device according to the present invention, it is preferred that:

[0028] The clamping portion includes a restriction piece that restricts movement of the arm relative to the spacer in the longitudinal direction of the rod-shaped portion.

[0029] The reflector mounting device of this configuration can reliably prevent the arm from being displaced relative to the spacer in the longitudinal direction of the rod-shaped portion of the armrest when the operator holds the arm and rotates the arm when vibration, impact, etc. are applied to the arm.

[0030] In the reflector mounting device according to the present invention, it is preferred that:

[0031] The boundary portion between the spacer and the clamping portion is composed of a convex surface and a concave surface. The convex surface is provided on the spacer side and is in a spherical zone shape. The concave surface is provided on the clamping portion side and is engaged with the convex surface.

[0032] According to the reflector mounting device of this configuration, the arm can be tilted using the boundary portion between the spacer and the clamping portion as a fulcrum, so that the field of view area of ​​the reflector supported by the arm can be finely adjusted easily.

[0033] In the reflector mounting device according to the present invention, it is preferred that:

[0034] The reflector mounting device further includes a locking member that locks the spacer to the rod-shaped portion.

[0035] According to the reflector mounting device of this structure, the locking member can reliably prevent the position of the spacer relative to the rod-shaped portion of the handrail from being offset. As a result, the clamping force of the clamping portion relative to the rod-shaped portion of the handrail can be used exclusively as a clamping force to prevent the arm from rotating relative to the rod-shaped portion due to vibration, impact, etc. during excavation operations, so the clamping force can be easily set.

[0036] In the reflector mounting device according to the present invention, it is preferred that:

[0037] The clamping portion is configured to clamp the rod-shaped portion via the spacer by fastening a receiving member and a pressing member that are arranged to sandwich the spacer with a fastener.

[0038] The reflector mounting device is provided with a cover member that covers the pressing member and the fastening member.

[0039] According to the reflector mounting device of this configuration, the pressing member and the fastening member are covered by the cover member and cannot be seen from the outside, so that the design of the appearance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a side view of a hydraulic excavator equipped with a reflector mounting device.

[0041] Figure 2 It is a structural explanatory diagram of the reflector mounting device according to the first embodiment.

[0042] Figure 3 It is a structural explanatory diagram of a reflector mounting device according to a second embodiment.

[0043] Figure 4 It is a structural explanatory diagram of a reflector mounting device according to a third embodiment.

[0044] Figure 5 This is a diagram for explaining the structure of the main parts when a spherical segment-shaped spacer is used.

[0045] Figure 6 This is an explanatory diagram of the locking structure of the spacer.

[0046] Description of reference numerals:

[0047] 10 Handrails

[0048] 10a Rod-shaped part

[0049] 11A~11C Reflector mounting device

[0050] 12. Reflector

[0051] 15 Spacer

[0052] 16 Spacer

[0053] 16a engagement recess

[0054] 20 Arm

[0055] 23 Clamping part

[0056] 23a Concave

[0057] 42, 45 Bushing

[0058] 60 Restricted Film

[0059] 61 Cover member

[0060] 65 Spacer

[0061] 65a Convex

[0062] 66 Spacer

[0063] 66a engagement recess

[0064] 71 Locking pin (locking member)

[0065] 72 Self-tapping screw (locking member). DETAILED DESCRIPTION

[0066] The present invention is described below with reference to the accompanying drawings. It should be noted that in the following embodiments, an example of a reflector mounting device is given for description, and the reflector mounting device is suitable for mounting a rear and side reflector (side mirror, back mirror) for visual identification on a cab in a hydraulic excavator as a working machine. However, the present invention is not intended to be limited to the embodiments described below and the structures recorded in the accompanying drawings.

[0067] [First embodiment]

[0068] <General Structure of Hydraulic Excavator>

[0069] Figure 1 It is a side view of the hydraulic excavator 1 provided with the reflector mounting device 11A. Figure 1 The hydraulic excavator 1 shown includes a lower traveling structure 2, an upper rotating structure 3 rotatably provided on the lower traveling structure 2, and a working machine 4 bendably and undulatingly mounted at the front center of the upper rotating structure 3. A cab 5 constituting a driver's cabin is provided on the front left side of the upper rotating structure 3.

[0070] A door 6 for opening and closing the access port for the operator to get on and off the vehicle is installed on the left side of the cab 5. In addition, near the door 6 of the cab 5, a handrail 10 is installed along the front pillar 7 so that it can be used as a handrail when the operator gets on and off the vehicle through the access port.

[0071] The cab 5 is formed in a circular shape with its front portion bulging forward. Therefore, the front pillar 7 is formed in a curved shape bulging forward, and in accordance with this, the armrest 10 is also formed in a curved shape with a rod-shaped portion 10a having a circular cross-section or a circular cross-section (in this example, a circular cross-section) bulging forward between the mounting portions at both ends in the vertical direction. Furthermore, a reflector 12 is mounted on the curved rod-shaped portion 10a of the armrest 10 via a reflector mounting device 11A.

[0072] <Reflector>

[0073] The reflector 12 is used to ensure the rear and side vision, and is configured to be extended to the left side of the cab 5 through the reflector mounting device 11A, and can be stored close to the cab 5. The reflector 12 includes: a reflector housing 12a, one side (the front side at the extended position when in use) of which is closed and the other side (the rear side at the extended position when in use) is open; and a mirror body 12b, which is fitted in a manner of closing the other side of the reflector housing 12a. A hemispherical seat is formed in the center of one side of the reflector housing 12a, so that the hemispherical seat engages approximately half of the spherical support portion 22 of the arm 20 described later, and a retainer engaged with the remaining approximately half of the spherical support portion 22 is fastened to the reflector housing 12a by a fastener, thereby mounting the reflector 12 on the top end of the arm 20, and the detailed description based on the drawings is omitted. Moreover, by adjusting the fastening force based on the fastening condition of the fastener, the clamping force of the hemispherical seat and the retaining frame on the spherical support portion 22 is adjusted, thereby preventing the reflector 12 from rotating (tilting) relative to the spherical support portion 22 due to vibration, impact, etc. when the hydraulic excavator 1 is operating. On the other hand, the operator can hold the reflector housing 12a and rotate it relative to the spherical support portion 22 to operate the reflector 12.

[0074] <Mirror Mounting Device>

[0075] Figure 2 It is a structural explanatory diagram of the reflector mounting device 11A according to the first embodiment. Figure 2 (a) is a top view of the rod-shaped portion 10a installed on the handrail 10, Figure 2 (b) is Figure 2 The enlarged view of part A of (a), Figure 2 (c) is Figure 2 (b) is a cross-sectional view of the BB direction. Figure 2 As shown in FIG. 1 ( a ), the reflector mounting device 11A includes a resin spacer 15 fitted on the rod-shaped portion 10 a and a resin arm 20 that supports the reflector 12 .

[0076] <Spacer (cylindrical type)>

[0077] like Figure 2 As shown in (b) and (c) of FIG. 1 , the spacer 15 is generally cylindrical in appearance, and in this example, is formed by combining two spacers 16 that are generally semi-cylindrical in appearance. The two spacers 16 are arranged so as to sandwich the rod-shaped portion 10a from both sides in the direction orthogonal to the length direction and the bulging direction of the rod-shaped portion 10a (the left-right direction of the upper rotating body 3). The two spacers 16 in this arrangement are each as shown in FIG. Figure 2 As shown in (c), the rod-shaped portion 10a has an engagement recess 16a that can be engaged with the rod-shaped portion 10a. The engagement recess 16a is formed into a groove shape having a substantially semicircular cross section that is curved along the curved shape of the rod-shaped portion 10a so as to be in close contact with the outer peripheral surface of the rod-shaped portion 10a.

[0078] like Figure 2 As shown in (b), a small gap S is provided between the opposing surfaces of the two spacers 16 when they are arranged in a close contact state on the outer peripheral surface of the rod-shaped portion 11a. By providing such a gap S, an interference fit can be provided for firmly frictionally engaging the spacer 15 with the outer peripheral surface of the rod-shaped portion 10a by utilizing the clamping force from the clamping portion 23 described later.

[0079] In this example, an example is shown in which two spacer pieces 16 obtained by dividing the spacer 15 into two in the circumferential direction (the circumferential direction of the rod-shaped portion 10a) are combined to form a spacer 15 that is roughly cylindrical in appearance, but this is not limited to this. The spacer 15 can also be composed of three or more spacer pieces obtained by dividing the spacer 15 into three or more in the circumferential direction.

[0080] <Arm>

[0081] like Figure 2 As shown in (a), the arm 20 has an arm body 21 with an arched shape that gradually becomes thinner as it moves from the base end side to the top end side, a spherical support portion 22 integrally provided with the top end side of the arm body 21, and a clamping portion 23 provided on the base end side of the arm body 21.

[0082] <Clamping section>

[0083] The clamping portion 23 includes a receiving member 31, a pressing member 32 and a fastener 33. The receiving member 31 and the pressing member 32 are arranged in the radial direction of the rod-shaped portion 11a in a manner of clamping the spacer 15 embedded in the rod-shaped portion 10a. The receiving member 31 is integrally connected to the base end side of the arm body 21. The receiving member 31 has a receiving side retaining frame portion 34 that accommodates and holds approximately half of the spacer 15, and is configured by integrally providing a pair of receiving side mounting portions 35 on both sides of the receiving side retaining frame portion 34. The pressing member 32 has a pressing side retaining frame portion 36 that accommodates and holds the remaining approximately half of the spacer 15, and is configured by integrally providing a pair of pressing side mounting portions 37 on both sides of the pressing side retaining frame portion 36. In the receiving member 31 and the pressing member 32, the spacer 15 is sandwiched by the receiving side retainer portion 34 and the pressing side retainer portion 36, and the pressing member 32 is positioned relative to the receiving member 31 in such a manner that the pair of receiving side mounting portions 35 and the pair of pressing side mounting portions 37 are opposed to each other. The receiving member 31 and the pressing member 32 positioned in this way are fastened by the fastener 33. As the fastener 33, for example, a fastener composed of a pair of embedded nuts 38 embedded in the pair of receiving side mounting portions 35 and a pair of pan head screws 39 that penetrate the pair of pressing side mounting portions 37 and are screwed into the pair of embedded nuts 38 can be used.

[0084] <Restricted Film>

[0085] like Figure 2 As shown in (c), a limiting piece 60 is formed on the receiving member 31 and the pressing member 32, and the limiting piece 60 limits the movement of the arm 20 relative to the spacer 15 in the length direction of the rod-shaped portion 10a. In this example, a protrusion that protrudes from both ends of the receiving member 31 and the pressing member 32 in the upper and lower directions and is snapped onto the end surface of the spacer 15 (spacer 16) is used as the limiting piece 60. By providing such a limiting piece 60, it is possible to reliably prevent the arm 20 from being displaced relative to the spacer 15 in the length direction of the rod-shaped portion 10a when vibration, impact, etc. are applied to the arm during excavation or when the operator holds the arm 20 and turns the arm 20 vigorously.

[0086] In the reflector mounting device 11A constructed as described above, when mounting the reflector 12 on the curved rod-shaped portion 10a in the handrail 10, two spacers 16 are arranged in a manner that clamps the rod-shaped portion 10a from both sides in directions orthogonal to the length direction and the bulging direction of the rod-shaped portion 10a (the left-right direction of the upper rotating body 3), and the spacer 15 composed of the two spacers 16 is externally embedded / assembled on the rod-shaped portion 10a in a manner that the engaging recess 16a in each spacer 16 is in close contact with the outer peripheral surface of the rod-shaped portion 10a.

[0087] The engaging recess 16a in the spacer 16 is formed into a groove shape having a substantially semicircular cross section that is curved along the curved shape of the rod-shaped portion 10a so as to be in close contact with the outer peripheral surface of the rod-shaped portion 10a. Therefore, when the spacer 15 composed of two spacers 16 is mounted on the rod-shaped portion 10a in such a manner that the engaging recess 16a in each spacer 16 is in close contact with the outer peripheral surface of the rod-shaped portion 10a, the rod-shaped portion 10a and the engaging recess 16a are matched and engaged in a mutually curved shape, so that the spacer 15 cannot be rotated even if the spacer 15 is to be rotated in the circumferential direction of the rod-shaped portion 10a. In this way, the spacer 15 is externally fitted to the rod-shaped portion 10a in a manner that it cannot be rotated.

[0088] Next, in the radial direction of the rod-shaped portion 10a, the arm body 21 is brought close to the spacer 15 so that the receiving-side retainer portion 34 accommodates and retains approximately half of the spacer 15 externally fitted to the rod-shaped portion 10a, and the receiving member 31 is positioned, and the pressing member 32 is arranged so that the remaining approximately half of the spacer 15 is accommodated and retained by the pressing-side retainer portion 36, and the spacer 15 is sandwiched between the receiving-side retainer portion 34 and the pressing-side retainer portion 36, and the pressing member 32 is positioned relative to the receiving member 31 so that the pair of receiving-side mounting portions 35 and the pair of pressing-side mounting portions 37 are opposed. Then, the receiving member 31 and the pressing member 32 positioned in this way are fastened using the fastener 33 composed of a pair of embedded nuts 38 and a pair of pan head screws 39.

[0089] In the reflector mounting device 11A of the present embodiment, the spacer 15 is obtained by combining two spacers 16, and the spacer 16 has an engaging recess 16a engaged with the curved rod-shaped portion 10a, and the surface of the engaging recess 16a in the spacer 16 functions as a clamping surface suitable for clamping the curved rod-shaped portion 10a. Thus, the spacer 15 is frictionally engaged along the shape of the rod-shaped portion 10a by the clamping force from the clamping portion 23. Therefore, the reflector 12 can be stably supported on the rod-shaped portion 10a, which is particularly effective in the hydraulic excavator 1 that is often subjected to strong vibration.

[0090] In addition, in the reflector mounting device 11A, the clamping force of the clamping portion 23 is adjusted by adjusting the clamping force based on the adjustment of the tightening condition of the fastener 33, thereby preventing the arm 20 from rotating relative to the rod-shaped portion 10a due to vibration, impact, etc. during excavation or other operations, and on the other hand, the reflector 12 can be extended to a position suitable for use or stored in a manner that does not hinder movement by the operator holding the arm 20 and rotating the arm 20. It should be noted that during the rotation operation of holding the arm 20, the spacer 15 is externally fitted to the rod-shaped portion 10a in a manner that does not rotate, so the arm 20 rotates relative to the spacer 15.

[0091] Furthermore, in the reflector mounting device 11A, since the rod-shaped portion 10 a can be clamped by the clamping portion 23 at an arbitrary height position, the reflector 12 can be disposed at an arbitrary height position of the rod-shaped portion 10 a .

[0092] [Second embodiment]

[0093] Figure 3 It is a structural explanatory diagram of a reflector mounting device 11B according to the second embodiment. Figure 3 (a) is a top view of the rod-shaped portion 10a installed on the handrail 10, Figure 3 (b) is Figure 3 The enlarged view of part C of (a), Figure 3 (c) is Figure 3 It should be noted that, in the second embodiment, regarding the same or similar structures as those in the first embodiment, the same reference numerals are retained in the drawings and their detailed description is omitted, and the following description will focus on the unique parts of the second embodiment.

[0094] <Clamping section>

[0095] like Figure 3 As shown in (b), in the reflector mounting device 11B of the second embodiment, the receiving member 31 includes an arm body 21 (see Figure 3 The receiving member body 41 is integrally connected to the base end side of (a)), and the bushing 42 that is in sliding contact with the spacer 15. The receiving member body 41 has a pair of receiving side mounting portions 35 (see Figure 3 (a)), and a connecting portion 43 having a bushing accommodating recess 43a capable of accommodating the bushing 42 in a loosely fitted state, and a pair of receiving side mounting portions 35 are integrally connected by the connecting portion 43. When the resin constituting the arm body 21 is, for example, a nylon resin to which glass fiber is added, the bushing 42 is made of a resin having excellent sliding properties compared to the nylon resin, such as POM (polyoxymethylene) resin, and is disposed in the bushing accommodating recess 43a. The bushing 42 and the connecting portion 43 constitute the receiving side retainer portion 34 that accommodates and retains approximately half of the spacer 15 externally fitted to the rod-shaped portion 10a.

[0096] In the reflector mounting device 11B of the second embodiment, the pressing member 32 includes a pressing member body 44 and a bushing 45 that is in sliding contact with the spacer 15. The pressing member body 44 has a pair of pressing side mounting portions 37 (see Figure 3(a)), and a connecting portion 46 having a bushing accommodating recess 46a capable of accommodating the bushing 45 in a loosely fitted state, and a pair of pressing side mounting portions 37 are integrally connected by the connecting portion 46. When the resin constituting the pressing member body 44 is, for example, a nylon resin with glass fiber added, the bushing 45 is made of a resin having a higher sliding property than the nylon resin, such as POM (polyoxymethylene) resin, as in the bushing 42, and is disposed in the bushing accommodating recess 46a. The bushing 45 and the connecting portion 46 constitute the pressing side retainer portion 36 that accommodates and retains the remaining approximately half of the spacer 15 externally fitted to the rod-shaped portion 10a.

[0097] like Figure 3 As shown in (c), the connecting parts 43 and 46 are provided with protrusions 51 and 52 extending in the circumferential direction of the rod-shaped part 10a. On the other hand, the bushings 42 and 45 are provided with grooves 53 and 54 capable of engaging with the protrusions 51 and 52. In addition, the connecting parts 43 and 46 are provided with locking protrusions 55 and 56. On the other hand, the bushings 42 and 45 are provided with locking holes 57 and 58 capable of engaging with the locking protrusions 55 and 56 with play in the circumferential direction of the rod-shaped part 10a. Moreover, the protrusions 51 and 52 are engaged with the grooves 53 and 54, and the locking protrusions 55 and 56 are engaged with the locking holes 57 and 58, so that the bushings 42 and 45 that can be relatively displaced around the rod-shaped part 10a (in the circumferential direction) are arranged in the bushing accommodating recesses 43a and 46a in a loosely fitted state.

[0098] <Restricted Film>

[0099] The bushings 42 and 45 are provided with a restriction piece 60 for restricting the movement of the arm 20 in the longitudinal direction of the rod-shaped portion 10a relative to the spacer 15. In this example, the restriction piece 60 is a protrusion that protrudes from both ends of the bushings 42 and 45 in the vertical direction and is engaged with the end surface of the spacer 15 (spacer 16).

[0100] In the reflector mounting device 11B of the second embodiment configured as described above, the same effects as those of the reflector mounting device 11A of the first embodiment can be obtained. Moreover, according to the reflector mounting device 11B of the second embodiment, by applying a certain rotational force or more to the arm 20, the arm 20 can be smoothly rotated by sliding the contact portion between the spacer 15 and the bushings 42 and 45, so that the reflector 12 can be easily extended to a position suitable for use or the reflector 12 can be stored in a manner that does not hinder movement. In addition, when the rod-shaped portion 10a of the handrail 10 is clamped via the spacer 15, the relative position between the spacer 15 and the bushings 42 and 45 that can be relatively displaced around the spacer 15 can be adjusted to correct the positional deviation between the spacer 15 and the spacer 15, so that the rod-shaped portion 10a can be reliably clamped via the spacer 15.

[0101] [Third embodiment]

[0102] Figure 4 It is a structural explanatory diagram of a reflector mounting device 11C according to the third embodiment. Figure 4 (a) is a top view of the rod-shaped portion 10a installed on the handrail 10, Figure 4 (b) is Figure 4 The enlarged view of part E of (a), Figure 4 (c) is Figure 4 (b) is a cross-sectional view taken along the FF direction. It should be noted that, in the third embodiment, the same or similar structures as those in the first embodiment are marked with the same reference numerals in the drawings and their detailed description is omitted. The following description will focus on the unique parts of the third embodiment.

[0103] <Clamping section>

[0104] In the reflector mounting device 11A of the first embodiment, the pressing member 32 formed of resin is used, but in the reflector mounting device 11C of the third embodiment, the pressing member 32 formed by bending a metal plate is used. Figure 4 As shown in (a), the pressing member 32 has a curved plate-shaped pressing side retainer portion 36 that accommodates and retains the remaining approximately half of the spacer 15 retained by the receiving side retainer portion 34, and is composed of a pair of flat pressing side mounting portions 37 that are connected to each other on both sides of the pressing side retainer portion 36. In the receiving member 31 and the pressing member 32, the spacer 15 is sandwiched by the receiving side retainer portion 34 and the pressing side retainer portion 36, and the pressing member 32 is positioned relative to the receiving member 31 in such a manner that the pair of receiving side mounting portions 35 and the pair of pressing side mounting portions 37 are opposed to each other. The receiving member 31 and the pressing member 32 positioned in this way are fastened by the fastener 33.

[0105] In the reflector mounting device 11C of the third embodiment, a cover member 61 is further provided to cover the pressing member 32 and the fastener 33 (a pair of pan head screws 39). It should be noted that a locking portion (or a locked portion) is provided on the receiving member 31 side, and a locked member (or a locking portion) is provided on the cover member 61 side. By elastically engaging these locking portions (or a locked portion) with the locked member (or a locking portion), the cover member 61 is assembled with respect to the receiving member 31 in a manner that is easy to attach and detach. Regarding this situation, detailed description based on the drawings is omitted.

[0106] In the reflector mounting device 11C of the third embodiment constructed as described above, the same effects as those of the reflector mounting device 11A of the first embodiment can be obtained. In addition, according to the reflector mounting device 11C of the third embodiment, the pressing member 32 and the fastener 33 (a pair of pan head screws 39) are covered by the cover member 61, so the pressing member 32 and the fastener 33 are not visible from the outside, which can improve the appearance design.

[0107] <Spacer (Spherical Cut Type)>

[0108] Figure 5 It is a diagram for explaining the structure of the main parts when the spacer 65 in the shape of a truncated sphere is used. Figure 5 (a) is related to Figure 2 The cross-sectional view of (c) is equivalent to the cross-sectional view, Figure 5 (b) is related to Figure 3 The cross-sectional view of (c) is equivalent to the cross-sectional view, Figure 5 (c) is related to Figure 4 In the above-mentioned reflector mounting devices 11A to 11C, an example is shown in which a spacer 15 having a substantially cylindrical shape when viewed from the outside is used, and the spacer 15 is formed by combining two spacers 16 having a substantially semi-cylindrical shape when viewed from the outside. However, it is also possible to Figure 5 As shown in (a) to (c) of , a spacer 65 having a substantially spherical shape when observed in appearance is used, and the spacer 65 is formed by combining two spacers 66 having a substantially hemispherical shape when observed in appearance. Here, the two spacers 66 are arranged so as to clamp the rod-like portion 10a from both sides in directions orthogonal to the length direction and the bulging direction of the rod-like portion 10a (the left-right direction of the upper rotating body 3). The two spacers 66 arranged in this way each have a snap-fitting recess 66a that can be snapped into the rod-like portion 10a in a manner that is in close contact with the outer peripheral surface of the rod-like portion 10a. The snap-fitting recess 66a is formed into a groove-shaped having a substantially semicircular cross-section that is curved along the curved shape of the rod-like portion 10a so as to be in close contact with the outer peripheral surface of the rod-like portion 10a. It should be noted that in Figure 5In the examples shown in (a) to (c), an example is shown in which two spacer pieces 66 obtained by dividing the spacer 65 into two in the circumferential direction (circumferential direction of the rod-shaped portion 10a) are combined to form a spacer 65 that is roughly spherical in appearance when observed, but the present invention is not limited to this. Three or more spacer pieces obtained by dividing the spacer 65 into three or more in the circumferential direction may also be combined to form a spacer 65 that is roughly spherical in appearance when observed.

[0109] exist Figure 5 In the examples shown in (a) to (c) of FIG. 1 , the boundary portion between the spacer 65 and the clamping portion 23 is composed of a convex surface 65a and a concave surface 23a, the convex surface 65a being provided on the side of the spacer 65 and being in a spherical band shape, and the concave surface 23a being provided on the side of the clamping portion 23 and engaging with the convex surface 65a. Thus, the arm 20 can be tilted with the boundary portion between the spacer 65 and the clamping portion 23 as a fulcrum, so that the field of view area of ​​the reflector 12 can be finely adjusted easily.

[0110] <Locking member>

[0111] Figure 6 It is an explanatory diagram of the locking structure of the spacers 15 and 65. Figure 6 (a) is a partial cross-sectional plan view showing a case where a locking pin 71 is applied as a locking member for locking the spacer 15 to the rod-shaped portion 10a. Figure 6 (b) is Figure 6 (a) is a cross-sectional view taken along the GG direction. Figure 6 (c) is a partial cross-sectional plan view showing a case where a locking pin 71 is applied as a locking member for locking the spacer 65 to the rod-shaped portion 10 a. Figure 6 (d) is Figure 6 (c) is a cross-sectional view taken along the HH line. Figure 6 (e) is a partial cross-sectional plan view showing a case where a tapping screw 72 is used as a locking member for locking the spacer 15 to the rod-shaped portion 10 a. Figure 6 (f) is Figure 6 (e) Cross-sectional view taken along arrow II. Figure 6 (g) is a partial cross-sectional plan view showing a case where a tapping screw 72 is applied as a locking member for locking the spacer 65 to the rod-shaped portion 10 a. Figure 6 (h) is Figure 6 (g) Cross-sectional view taken along the JJ line.

[0112] In the above-mentioned reflector mounting devices 11A to 11C, it is preferable to provide a locking member for locking the spacers 15 and 65 with respect to the rod-shaped portion 10a. As the locking member, for example, Figure 6As shown in (a) to (d) of FIG. 1 , a locking pin 71 is provided so as to penetrate the rod-shaped portion 10a in the radial direction and protrude from both radial sides of the rod-shaped portion 10a. When the locking pin 71 is used, the two spacers 16 and 66 are provided with engaging holes 16b and 66b, and the engaging holes 16b and 66b are engaged with the two ends of the locking pin 71 protruding outward in the radial direction of the rod-shaped portion 10a. In addition, as a locking member, a Figure 6 As shown in (e) to (h) of FIG. 1 , a self-tapping screw 72 is provided which penetrates the spacers 15 and 65 from the outer peripheral side and is screwed to the outer peripheral portion of the rod-shaped portion 10a. When the self-tapping screw 72 is used, countersunk holes 16c and 66c are provided in the two spacers 16 and 66, and the countersunk holes 16c and 66c can accommodate the head of the self-tapping screw 72 so that the head does not protrude from the outer peripheral surface of the spacers 16 and 66.

[0113] According to the reflector mounting devices 11A to 11C provided with the above-mentioned locking members (locking pins 71 and self-tapping screws 72), the locking members (locking pins 71 and self-tapping screws 72) can reliably prevent the positional deviation of the spacers 15 and 65 relative to the rod-shaped portion 10a of the handrail 10, more specifically, the positional deviation in the length direction of the rod-shaped portion 10a. As a result, the clamping force of the clamping portion 23 relative to the rod-shaped portion 10a can be used exclusively as a clamping force to prevent the arm 20 from rotating relative to the rod-shaped portion 10a of the handrail 10 due to vibration, impact, etc. during excavation work, so the clamping force can be easily set.

[0114] The reflector mounting device of the present invention has been described above based on a plurality of embodiments, but the present invention is not limited to the structures described in the above embodiments, and the structures described in the various embodiments can be appropriately combined and modified within the scope of the present invention.

[0115]

Industrial Applicability

[0116] The reflector mounting device of the present invention can be used for mounting a reflector to a rod-shaped portion bent from a handrail in a working machine such as a construction machine or a dock loading and unloading machine.

Claims

1. A reflector mounting device for mounting a reflector on a handrail having a curved rod-shaped portion, wherein: The reflector mounting device comprises: a spacer comprising a plurality of spacer sheets, each spacer sheet having an engaging recessed portion engaged with the rod-shaped portion; and an arm supporting the reflector, The arm includes a clamping portion that clamps the rod-shaped portion via the spacer.

2. The reflector mounting device according to claim 1, wherein: The clamping portion includes a bushing that is in sliding contact with the spacer.

3. The reflector mounting device according to claim 2, wherein: The bushing is configured to be relatively displaceable around the spacer.

4. The reflector mounting device according to any one of claims 1 to 3, wherein: The clamping portion includes a restriction piece that restricts movement of the arm relative to the spacer in the longitudinal direction of the rod-shaped portion.

5. The reflector mounting device according to any one of claims 1 to 3, wherein: The boundary portion between the spacer and the clamping portion is composed of a convex surface and a concave surface. The convex surface is provided on the spacer side and is in a spherical zone shape. The concave surface is provided on the clamping portion side and is engaged with the convex surface.

6. The reflector mounting device according to any one of claims 1 to 3, wherein: The reflector mounting device further includes a locking member that locks the spacer to the rod-shaped portion.

7. The reflector mounting device according to any one of claims 1 to 3, wherein: The clamping portion is configured to clamp the rod-shaped portion via the spacer by fastening a receiving member and a pressing member that are arranged to sandwich the spacer with a fastener. The reflector mounting device is provided with a cover member that covers the pressing member and the fastening member.

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