Handrail device

Abstract

To provide a handrail device which can fix a removable handrail to a bracket easily and which can restrict unstableness at fixing.SOLUTION: A handrail device 10 comprises a handrail 30 which can be fixed to and removed from a bracket 20, a slide lock 40 provided slidably inside of the handrail 30 and engageable with a recess part 24 provided at the bracket 20 and a cam 60 rotatably provided at the handrail 30 and having a pressing surface pressing the slide lock 40 so as to engage with the recess part 24 and an allowable surface allowing a slide of the slide lock 40.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a handrail device. [Background technology]

[0002] Patent Document 1 discloses a handrail device that can be easily attached to a handrail using a mounting bracket attached to a post that stands up from the floor. In this handrail device, a fixed piece is provided slidably on a guide rail inside the handrail, and the handrail is fixed to the mounting bracket by screwing in a screw body to fix the fixed piece to the guide rail and pressing the fixed piece into an engagement receiver of the mounting bracket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-003197 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the handrail device of Patent Document 1 requires a tool to operate the screw body during installation, and installation and removal are time-consuming and laborious. In addition, the handrail device is fixed by the abutment of the fixing piece with the engagement receiving part, which may cause the handrail to wobble.

[0005] An object of the present invention is to provide a handrail device that enables a removable handrail to be easily fixed to a bracket and that can suppress wobbling when fixed. [Means for solving the problem]

[0006] A handrail device of a first aspect of the present invention comprises a handrail that can be fixed to and removed from a bracket, a locking member that is slidably arranged inside the handrail along the extension direction of the handrail and can engage with an engaging portion provided on the bracket, and a cam member that is rotatably arranged relative to the handrail and has a pressing surface that presses the locking member to engage it with the engaging portion, and a tolerance surface that is shorter from the shaft portion than the pressing surface and allows the locking member to slide.

[0007] The handrail device of the first aspect allows the handrail to be fixed to and removed from the bracket. The bracket is installed, for example, on a support pillar erected from the floor or on a wall surface. In the handrail device, a locking member is provided slidably along the extension direction of the handrail, and a cam member is provided rotatably adjacent to the locking member. Then, when an operator rotates the cam member, the locking member pressed by the pressing surface engages with the engagement portion of the bracket, and the handrail is fixed to the bracket. Also, when an operator rotates the cam member, the permissible surface faces the locking member, and the locking member is moved back from the bracket, so that the handrail can be removed from the bracket. As described above, according to the first aspect, by rotating the cam member, the handrail can be easily fixed to the bracket in a removable manner. Also, since the locking member can be firmly engaged with the bracket using the cam, wobbling during fixing is suppressed.

[0008] A second aspect of the present invention is a handrail device according to the first aspect, wherein the cam member is provided with a protruding surface between the pressing surface and the tolerance surface, the protruding surface being at a longer distance from the shaft portion than the pressing surface.

[0009] In the second aspect, when the cam member pressing the locking member on the pressing surface is rotated, the cam member moves the contact position with the locking member from the pressing surface to the protruding surface, and then becomes a position facing the permissible surface, allowing the handrail to be removed from the bracket. In other words, when removing the handrail from the bracket, the cam member needs to overcome the protruding surface that is higher than the pressing surface. Therefore, according to the second aspect, it is possible to prevent the handrail, which has been released from its fixing, from falling off the bracket due to the cam member rotating when a user holding the handrail accidentally touches the cam member or receives a reaction force from the locking member.

[0010] A third aspect of the present invention is the handrail device of the first or second aspect, further comprising an operating portion that is provided on the locking member and protrudes from the handrail.

[0011] According to the third aspect, by providing the operation portion on the locking member, the locking member that is tightly engaged with the engagement portion can be slid without using a tool.

[0012] A fourth aspect of the present invention is the handrail device of the third aspect, wherein the operating part is accommodated in the handrail by being rotated from a state in which it protrudes from the handrail in the pressing direction of the locking member.

[0013] According to the fourth aspect, by providing the operating portion so that it can be stored in the handrail, erroneous operation of the locking member is suppressed when the handrail is being used without operating the locking member, and the appearance of the area around the bracket can be prevented from being impaired.

[0014] A fifth aspect of the present invention provides the handrail device according to any one of the first to fourth aspects, further comprising a biasing member that draws the locking member toward the cam member.

[0015] In the fifth aspect, when the tolerable surface of the cam member faces the locking member, the locking member is retracted in the opposite direction to the pressing direction by the biasing member. Therefore, according to the fifth aspect, when fixing the handrail to the bracket or removing it, the worker does not need to manually retract and hold the locking member.

[0016] A sixth aspect of the present invention is the handrail device according to any one of the first to fifth aspects, wherein the engagement portion is a recess that narrows relative to the locking member as it moves in the pressing direction of the locking member.

[0017] According to the sixth aspect, it is possible to increase the engagement force when the locking member engaged with the engagement portion by the rotational operation of the cam member moves in the pressing direction. Effect of the Invention

[0018] According to the present invention, a removable handrail can be easily fixed to a bracket, and wobbling during fixing can be suppressed. [Brief description of the drawings]

[0019] [Figure 1A] FIG. 1 is a perspective view of a handrail device according to a first embodiment. [Figure 1B] 1 is a cross-sectional view of a handrail device according to a first embodiment. [Diagram 2] FIG. 1 is a side view of a handrail device according to a first embodiment. [Diagram 3] 1 is a side cross-sectional view of a handrail device according to a first embodiment. [Figure 4] FIG. 2 is a side view of the slide lock of the handrail device according to the first embodiment. [Diagram 5] FIG. 2 is a side view of the cam of the handrail device according to the first embodiment. [Figure 6] FIG. 2 is a bottom perspective view of a fixing portion between the handrail and the bracket in the handrail device according to the first embodiment, showing the fixed-released state. [Figure 7]FIG. 2 is a side cross-sectional view of a fixing portion between a handrail and a bracket in the handrail device according to the first embodiment, showing a fixed-released state. [Figure 8] FIG. 2 is a bottom perspective view of a fixing portion between the handrail and the bracket in the handrail device according to the first embodiment, showing a fixed state. [Figure 9] FIG. 2 is a side cross-sectional view of a fixing portion between a handrail and a bracket in the handrail device according to the first embodiment, showing a fixed state. [Figure 10] FIG. 11 is a side cross-sectional view of a fixing portion between a handrail and a bracket in a handrail device according to a second embodiment, showing a fixed-release state. [Figure 11] FIG. 11 is a side cross-sectional view of a fixing portion between a handrail and a bracket in a handrail device according to a second embodiment, showing a fixed state. [Figure 12A] FIG. 13 is a perspective view of a handrail device according to a third embodiment, illustrating a state in which the lock and the bracket are released from each other. [Figure 12B] FIG. 13 is a perspective view of a handrail device according to a third embodiment, illustrating a fixed state between a slide lock and a bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] [First embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In each drawing, the right side when the worker faces the wall surface 12 is the right side, the left side is the left side, the upper side is the upper side, the lower side is the lower side, the back side is the front side, and the near side is the rear side. In addition, when the term "width" is used, it refers to the width when the handrail 30 is viewed in cross section, that is, the width in the front-to-rear direction, unless otherwise specified.

[0021] As shown in FIG. 1A, a fixed handrail 130, which is a known continuous handrail, is fixed to the wall surface 12 of the corridor. This fixed handrail 130 ends in front of the door 14, and the handrail device 10 of the present invention is provided in this end portion, i.e., between the fixed handrails 130.

[0022] (composition) As shown in Figures 1A, 1B, and 2, the handrail device 10 of this embodiment is composed of a plurality of brackets 20 fixed to a wall surface 12, and a handrail 30 fixed to the brackets 20 and extending left and right along the wall surface 12.

[0023] (bracket) The bracket 20 of this embodiment includes a left bracket 20L and a right bracket 20R that fix the handrail 30. The left bracket 20L is provided on the left side of the door 14, and the right bracket 20R is provided on the right side of the door 14. As shown in FIG. 1B, the bracket 20 stands on the wall surface 12, and is fixed to the wall surface 12 by fastening an anchor bolt 90 that passes through the lower end of the bracket 20 with a nut 92. The fixing portion of the bracket 20 to the wall surface 12 is covered with a cover 21 so as to hide the anchor bolt 90 and the nut 92. The bracket 20 is substantially Z-shaped in side view, and extends rearward from the wall surface 12, then turns upward and extends upward.

[0024] The bracket 20 has a fixing portion 22 at its upper end portion that is accommodated in a rail 34 of the handrail 30 (described later). As shown in FIG. 3, the fixing portions 22 of the left bracket 20L and the right bracket 20R each have a recess 24, which is a groove formed along the extension direction of the rail 34 (i.e., the left-right direction). This recess 24 is tapered so that the vertical width decreases as it goes from the opening to the back. Specifically, the fixing portion 22 of the left bracket 20L has a recess 24 that penetrates in the front-rear direction and opens to the right. The fixing portion 22 of the right bracket 20R has a recess 24 that penetrates in the front-rear direction and opens to the left.

[0025] (handrail) 1A, the handrail 30 of this embodiment is configured as a movable handrail that can be attached to and detached from the bracket 20. The handrail 30 is provided in a portion corresponding to the door 14 provided on the wall surface 12. In this embodiment, by removing the handrail 30 from the bracket 20, people can enter and exit through the door 14 without any hindrance.

[0026] As shown in FIG. 1B, FIG. 2, and FIG. 3, the handrail 30 includes a resin end cap 31, a resin head board 32, and a rail 34 formed of an aluminum extrusion material housed inside the head board 32. The end cap 31 is fixed to both the left and right ends of the rail 34. In a cross-sectional view, the head board 32 is C-shaped with an open lower portion, and the rail 34 has an open cross section with an open lower portion. In the lower part of the head board 32, a portion corresponding to the release operation part 44 and the cam 60 described later is formed as a wide opening 32A that is widened by cutting out the open portion in the C-shaped cross section. This wide opening 32A is formed so as not to interfere when the release operation part 44 slides and the cam 60 rotates. Note that the head board 32 is omitted from the handrail 30 in FIG. 2, FIG. 6, and FIG. 8.

[0027] Rail 34 has housing 34A therein and opening 34B at the bottom of housing 34A. Opening 34B is narrower than housing 34A. Housing 34A houses slide lock 40 made of metal and cam 60 made of resin.

[0028] Further, a long hole 36 and a round hole 38 penetrating the front and rear wall surfaces of the rail 34 are formed, respectively. The long hole 36 extends in the left-right direction, which is the same as the extension direction of the rail 34. The round hole 38 is provided adjacent to the long hole 36 in the left-right direction.

[0029] (Slide lock) The slide locks 40 are provided on both the left and right sides corresponding to the left bracket 20L and the right bracket 20R. The slide locks 40 are installed in such a way that their orientations are inverted relative to each other.

[0030] The slide lock 40 is slidably accommodated in the accommodation portion 34A of the rail 34. In this embodiment, the width of the slide lock 40 is slightly narrower than the width of the accommodation portion 34A and wider than the width of the opening 34B. Therefore, the slide lock 40 slides in the accommodation portion 34A without dropping downward from the opening 34B.

[0031] 4, the slide lock 40 includes a main body 42, a release operation portion 44, and a spring pin 46. The main body 42 includes an expanded width portion 42A, an engagement protrusion 42B, and a guide portion 42C. The expanded width portion 42A is a portion that is wider than the opening 34B of the rail 34 and extends in the left-right direction. The engagement protrusion 42B is a portion that protrudes leftward or rightward toward the corresponding recess 24 of the bracket 20 and is inserted into the recess 24.

[0032] The guide portion 42C is a trapezoidal portion formed downward from the lower end of the widening portion 42A. A pair of the guide portions 42C are formed in the front and rear, and a groove 42D that opens downward is formed between the pair of guide portions 42C in the main body portion 42. The release operation portion 44 is rotatably housed inside the groove 42D. The guide portion 42C is also formed with a through hole 42E that penetrates in the front-rear direction. Furthermore, the guide portion 42C is formed with a protrusion 47 that protrudes outward in the width direction at a location adjacent to the through hole 42E.

[0033] At both ends of the widened portion 42A in the width direction, opposite the engaging projection 42B, there are formed accommodation grooves 48 extending in the left-right direction. A coil spring 80, which will be described later, is accommodated in the accommodation grooves 48 (see FIG. 3). A through hole 49 penetrating the main body 42 in the width direction is formed near the left-right center of the accommodation grooves 48.

[0034] 2 and 4, by aligning the through hole 49 with the elongated hole 36 of the rail 34 and inserting the pin 82, the slide lock 40 can slide relative to the rail 34 within the length of the elongated hole 36. The pin 82 has grooves formed on its outer circumferential surface near both ends in the width direction, and E-shaped snap rings 84 are fitted into the grooves to prevent the pin 82 from falling off the rail 34 and the slide lock 40.

[0035] 7 and 9, one end of a coil spring 80 is fixed to each of both ends of the pin 82. The other end of this coil spring 80 is fixed to an end of a pin 83, which will be described later. Additionally, the coil spring 80 is a tension coil spring, and hooks at both ends are fixed to the pins 82 and 83. As a result, the pin 82 is constantly attracted to the pin 83 side, in other words, the slide lock 40 is constantly biased toward the cam 60 side.

[0036] As shown in FIG. 4, the release operation part 44 is a hammer-shaped member, and an insertion hole 44A is formed on the base side accommodated in the groove 42D. The width of the head side of the release operation part 44 is wider than the width of the groove 42D. The axis of the through hole 42E of the main body part 42 and the axis of the through hole 44A of the release operation part 44 are aligned, and the spring pin 46 is inserted, so that the release operation part 44 is pivotally supported by the main body part 42. Since the diameter of the through hole 42E is smaller than the diameter of the spring pin 46 before insertion, the spring pin 46, which has elasticity in the radial expansion direction, is fixed to the through hole 42E. Furthermore, the diameter of the insertion hole 44A is larger than the diameter of the spring pin 46. Therefore, the release operation part 44 can rotate with respect to the spring pin 46, i.e., the main body part 42.

[0037] (Cam member) 3, the cams 60 are provided on both the left and right sides corresponding to each of the slide locks 40. The cams 60 are installed in such a way that their orientations are inverted relative to each other.

[0038] 5, the cam 60 includes a body 61, a fixing operation portion 64, and an opening operation portion 66. A through hole 68 is formed on the upper side of the body 61 as a shaft portion that penetrates in the front-rear direction. In a side view, the body 61 is a portion having a substantially right-angled triangular shape, and is formed as a cam surface 62 from the base to the vertical side. The cam surface 62 includes an allowable surface 62A provided on the vertical side of the body 61 near the through hole 68, a pressing surface 62B provided on the bottom side, and a protruding surface 62C provided between the allowable surface 62A and the pressing surface 62B.

[0039] The permissive surface 62A has a function of permitting the slide lock 40 to slide against the rail 34 when facing the slide lock 40. The pressing surface 62B has a function of pressing the slide lock 40 toward the fixed portion 22 when facing and in contact with the slide lock 40. The permissive surface 62A is formed so as to be closer to the through hole 68 than the pressing surface 62B. Here, the difference between the distance from the through hole 68 to the pressing surface 62B and the distance from the through hole 68 to the permissive surface 62A is the amount of movement of the slide lock 40. The protruding surface 62C is formed so as to be closer to the through hole 68 than the pressing surface 62B.

[0040] The fixed operation part 64 extends from one end side (left side in the figure) of the pressing surface 62B toward a direction away from the through hole 68 (downward in the figure). The fixed operation part 64 is a part that an operator operates when rotating the cam 60 toward the slide lock 40 side (counterclockwise in the figure). The fixed operation part 64 has a substantially U-shaped cross section with the tolerable surface 62A side (right side in the figure) open, and includes side plate parts 64A on both sides in the width direction and a back plate part 64B connecting the pair of side plate parts 64A. A locking hole 64C, which is a hole penetrating in the front-rear direction, is formed at the lower end of the side plate part 64A. A pair of groove parts 64D penetrating in the left-right direction from the lower end of the back plate part 64B toward the body part 61 is formed (see FIG. 6).

[0041] The opening operation part 66 protrudes from the upper end of the back plate part 64B toward the opposite side to the tolerance surface 62A (the left side in the figure). The opening operation part 66 is a part that an operator operates when rotating the cam 60 in the opposite direction to the slide lock 40 (clockwise in the figure). In the fixed state described below, the opening operation part 66 protrudes from the wide opening 32A below the handrail 30 (see Figures 3 and 9).

[0042] 2, by aligning the through hole 68 with the round hole 38 of the rail 34 and inserting the pin 83, the cam 60 can rotate in the left-right direction around the pin 83. Note that by inserting a silicon tube (not shown) into the through hole 68 and then inserting the pin 83, it is possible to reduce the resistance when the cam 60 overcomes the protruding surface 62C when rotating. Also, in a fixed state described later, the elastic force of the silicon tube is added to the pressing force of the cam 60 against the slide lock 40, thereby ensuring the engagement of the slide lock 40.

[0043] Like pin 82, pin 83 has a groove formed on its outer peripheral surface near both ends in the width direction, and an E-shaped snap ring 84 is fitted into the groove to prevent pin 83 from falling off rail 34 and cam 60.

[0044] (How to attach and remove handrails) Below, we will explain how to attach and detach the handrail 30 to the bracket 20. Here, the state before the handrail 30 is fixed to the bracket 20 will be described as the "released state," and the state in which the handrail 30 is fixed to the bracket 20 will be described as the "fixed state." The "released state" is not limited to the state in which the handrail 30 installed on the bracket 20 is not fixed to the bracket 20, but also includes the state in which the handrail 30 has been removed from the bracket 20.

[0045] When the left bracket 20L and the right bracket 20R are installed on the wall surface 12, the distance between the left bracket 20L and the right bracket 20R is set in consideration of the positional relationship between the slide lock 40 and the cam 60 on the handrail 30. Specifically, it is set so that the pressing surface 62B of the cam 60 presses the slide lock 40 and the engagement force when the engagement protrusion 42B is inserted into the recess 24 is appropriate.

[0046] (1) Fixing method First, a method for fixing the handrail 30 in an unlocked state to the bracket 20 will be described.

[0047] First, when fixing, the worker checks that the fixing operation portion 64 of the cam 60 protrudes downward from the handrail 30 as shown in Figures 6 and 7. Next, the worker installs the handrail 30 on the bracket 20 so that the fixing portion 22 of the bracket 20 is accommodated in the accommodation portion 34A adjacent to the slide lock 40 in the rail 34.

[0048] Then, the worker operates the fixing operation part 64 towards the slide lock 40 (right side), thereby rotating the cam 60 towards the slide lock 40. Note that, during operation, it is advisable to operate both the left and right fixing operation parts 64 at the same time. In the rotated cam 60, the tolerance surface 62A that faced the slide lock 40 moves to the protruding surface 62C, and the protruding surface 62C presses the slide lock 40 towards the bracket 20. Then, the slide lock 40 starts to slide towards the bracket 20 against the biasing force of the coil spring 80.

[0049] Furthermore, when the worker operates the fixing operation part 64 to rotate the cam 60, as shown in Figures 8 and 9, the protruding surface 62C of the cam 60 climbs over the slide lock 40, and the pressing surface 62B comes into contact with the slide lock 40. The cam 60 then continues to press the slide lock 40 against the bracket 20, and the engaging protrusion 42B inserted into the recess 24 of the bracket 20 engages with the recess 24. As a result, the handrail 30 is fixed to the bracket 20.

[0050] On the other hand, when the cam 60 is rotated and the pressing surface 62B comes into contact with the slide lock 40, the tip of the guide portion 42C is accommodated in the groove portion 64D. In this case, the back plate portion 64B of the cam 60 rotates the release operation portion 44 upward, so that the release operation portion 44 that protrudes from the wide opening 32A while hanging from the handrail 30 in the fixed release state is accommodated in the handrail 30.

[0051] Furthermore, in this case, the protrusion 47 is received in the locking hole 64C. This prevents the cam 60 from rotating in the reverse direction, and the pressing surface 62B is maintained in contact with the slide lock 40.

[0052] (2) How to remove Next, a method for removing the fixed handrail 30 from the bracket 20 will be described.

[0053] First, the worker rotates the cam 60 to the opposite side of the slide lock 40 by operating the release operation part 66 protruding from the wide opening 32A shown in Figures 8 and 9 to the opposite side (left side) of the slide lock 40. As a result, the release operation part 44, which was housed above by the back plate part 64B, rotates downward by its own weight and protrudes from the wide opening 32A below the handrail 30. In addition, due to the rotation of the cam 60, the permission surface 62A faces the slide lock 40, instead of the pressing surface 62B that was in contact with the slide lock 40.

[0054] Here, when the tolerable surface 62A faces the slide lock 40, the slide lock 40 becomes slidable, but since the engagement protrusion 42B is engaged with the recess 24, the slide lock 40 does not slide even when subjected to the biasing force of the coil spring 80. Therefore, when the operator strongly operates the release operation part 44 toward the cam 60 side (left side), the engagement of the engagement protrusion 42B with the recess 24 is released, and the slide lock 40 slides toward the cam 60 side. In other words, the handrail 30 is in a fixed release state. Then, as shown in FIG. 6 and FIG. 7, the slide lock 40 that has been released from the engagement with the recess 24 is constantly biased toward the cam 60 side by the coil spring 80, so that the slide lock 40 maintains contact with the cam 60 even if the operator releases his / her hand from the release operation part 44.

[0055] Then, the worker lifts the handrail 30 upward, thereby removing the handrail 30 from the bracket 20.

[0056] (Summary of the embodiment) The handrail device 10 of this embodiment is formed so that the handrail 30 can be fixed to and removed from the bracket 20. In the handrail device 10, the slide lock 40 is provided slidably along the extension direction of the handrail 30 relative to the handrail 30, and the cam 60 is provided rotatably adjacent to the slide lock 40. When an operator rotates the cam 60, the slide lock 40 pressed by the pressing surface 62B engages with the recess 24 of the bracket 20, and the handrail 30 enters a fixed state fixed to the bracket 20. When an operator rotates the cam 60, the permissive surface 62A faces the slide lock 40, and the slide lock 40 retreats from the bracket 20, entering a release state, and the handrail 30 can be removed from the bracket 20.

[0057] As described above, according to this embodiment, the removable handrail 30 can be easily fixed to the bracket 20 by rotating the cam 60. In addition, the slide lock 40 can be firmly engaged with the bracket 20 by using the cam 60, so that wobbling of the handrail 30 in the fixed state is suppressed.

[0058] In addition, in this embodiment, when the cam 60 pressing the slide lock 40 at the pressing surface 62B is rotated, the cam 60 moves the contact position with the slide lock 40 from the pressing surface 62B to the protruding surface 62C, and then faces the allowable surface 62A. Then, by releasing the engagement of the slide lock 40 with the bracket 20, the fixed state is changed to the released state, and the handrail 30 can be removed from the bracket 20. In this way, when removing the handrail 30 from the bracket 20, the cam 60 needs to overcome the protruding surface 62C that is higher than the pressing surface 62B. Therefore, according to this embodiment, the handrail 30 in the released state is prevented from falling off the bracket 20 as a result of the cam 60 rotating due to the user holding the handrail 30 accidentally touching the cam 60 or receiving a reaction force from the slide lock 40.

[0059] This embodiment is also characterized by including a release operation part 44 that is provided on the slide lock 40 and protrudes from the handrail 30. According to this embodiment, by providing the release operation part 44 on the slide lock 40, the slide lock 40 that is tightly engaged with the recess 24 can be slid without using tools.

[0060] In particular, in the slide lock 40 of this embodiment, the release operation part 44 can be accommodated in the main body 42, so that when the handrail 30 is in a fixed state, the release operation part 44 can be accommodated in the handrail 30. As a result, according to this embodiment, erroneous operation of the slide lock 40 is suppressed when the handrail 30 is in a fixed state and the slide lock 40 is not being operated. Also, because the release operation part 44 does not protrude below the handrail 30, it is possible to prevent the appearance of the area around the bracket 20 from being impaired.

[0061] This embodiment is also characterized by the inclusion of a coil spring 80 that pulls the slide lock 40 toward the cam 60. When the tolerant surface 62A of the cam 60 faces the slide lock 40, the coil spring 80 constantly retracts the slide lock 40 toward the cam 60. Therefore, according to this embodiment, when fixing the handrail 30 to the bracket 20 and when removing it, the worker does not need to manually retract and hold the slide lock 40.

[0062] Furthermore, the recess 24 in this embodiment is tapered so that the vertical width decreases relative to the engaging protrusion 42B as it moves from the opening to the back. Therefore, according to this embodiment, the more the engaging protrusion 42B is inserted into the recess 24 by the rotational operation of the cam 60, the stronger the engagement between the two. In other words, according to this embodiment, the engagement force between the engaging protrusion 42B and the recess 24 can be increased compared to when the recess 24 is not tapered.

[0063] [Second embodiment] The second embodiment differs from the first embodiment in the shapes of the slide lock 40 and the cam 60. The differences from the first embodiment will be described below. Note that the same components as those in the first embodiment are given the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

[0064] 10, the slide lock 40 of this embodiment has a substantially L-shape in side view, and the release operation part 44 is formed integrally with the main body part 42. In addition, protrusions 47 are formed on both front and rear sides of the release operation part 44.

[0065] The cam 60 of this embodiment has a substantially Z-shape in side view. An opening 64E through which the release operation portion 44 of the slide lock 40 can be inserted is formed from the tip side of the back plate portion 64B toward the release operation portion 66 side.

[0066] As shown in FIG. 11, when the handrail 30 is fixed to the bracket 20, the worker rotates the cam 60, so that the release operation portion 44 is inserted through the opening 64E and the protrusion 47 is received in the locking hole 64C.

[0067] As described above, this embodiment has the following effects in addition to the effects described above. In this embodiment, when the handrail 30 is fixed to the bracket 20, the release operation part 44 does not rotate and remains in a state of protruding downward even when the cam 60 is operated. Therefore, although the release operation part 44 may protrude from below the handrail 30, the rigidity of the slide lock 40 is ensured by the release operation part 44 that does not rotate. Therefore, when changing from a fixed state to an unlocked state, the operator can apply a strong force to the release operation part 44 even if the engagement between the engagement protrusion 42B and the recess 24 is strong.

[0068] [Third embodiment] The third embodiment differs from the first embodiment in the shapes of the bracket 20 and the slide lock 40. The differences from the first embodiment will be described below. Note that the same components as those in the first embodiment are given the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

[0069] 12A and 12B are perspective views of the inside of the rail 34. As shown in Fig. 12A, grooves 25 extending in the left-right direction are formed on both the front and rear sides of the fixing portion 22 of the bracket 20 of this embodiment.

[0070] On the other hand, an engagement groove 42F is formed at the tip of the engagement projection 42B in the slide lock 40 of this embodiment, penetrating in the up-down direction and extending from the tip of the engagement projection 42B toward the cam 60. The tip of the engagement projection 42B is separated in the front-rear direction by this engagement groove 42F.

[0071] As shown in FIG. 12B, when the handrail 30 is fixed to the bracket 20, the worker rotates the cam 60, so that the tips of the two separated engagement projections 42B are inserted into the grooves 25, respectively.

[0072] According to this embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, according to this embodiment, the left bracket 20L and the right bracket 20R can be made common.

[0073] [remarks] In each of the above-described embodiments, the bracket 20 is attached to the wall surface 12, but this is not limited thereto, and the bracket 20 may be attached to a support pillar erected from the floor. Also, in each of the embodiments, the handrail 30 is fixed by two brackets 20, but this is not limited thereto, and the handrail 30 may be fixed by three or more brackets 20.

[0074] As shown in FIG. 3, in the first embodiment, the left bracket 20L has a recess 24 that opens to the right, and the right bracket 20R has a recess 24 that opens to the left. Therefore, when the handrail 30 is installed on the bracket 20, the handrail 30 is fixed by sliding the slide locks 40 on both sides in the left-right direction from the inside to the outside in the left-right direction. However, the opening direction of the recess 24 is not limited to this. For example, the left bracket 20L may have a recess 24 that opens to the left, and the right bracket 20R may have a recess 24 that opens to the right. In this case, the handrail 30 is fixed by sliding the slide locks 40 on both sides in the left-right direction from the outside to the inside in the left-right direction. [Explanation of symbols]

[0075] 10 handrail device, 12 wall surface, 14 door, 20 bracket 20L···Left bracket (bracket), 20R···Right bracket (bracket) 21 cover, 22 fixing portion, 24 recess (engagement portion), 25 groove 30···Handrail, 31···End cap, 32···Cap rail, 32A···Wide opening 34 rail, 34A storage portion, 34B opening, 36 long hole 38 round hole, 40 slide lock (lock member), 42 main body 42A: Widening portion, 42B: Engagement protrusion, 42C: Guide portion 42D...Groove, 42E...Through hole, 44...Release operation part (operation part) 44A... Through hole, 46... Spring pin, 47... Projection 48....Accommodating groove, 49....Through hole, 60....Cam (cam member) 61... Body portion, 62... Cam surface, 62A... Allowable surface, 62B... Pressing surface 62C...Protruding surface, 64...Fixed operation part, 64A...Side plate part 64B...back plate, 64C...locking hole, 64D...groove, 64E...opening 66...Opening operation part, 68...Through hole (shaft part) 80... Coil spring (urging member), 82... Pin, 83... Pin 84 Snap ring, 90 Anchor bolt, 92 Nut 130 Fixed handrail

Claims

1. A handrail that can be fixed to and detached from a bracket; A locking member that is provided inside the handrail so as to be slidable along the extension direction of the handrail and is engageable with an engaging portion provided on the bracket; a cam member that is rotatably provided with respect to the handrail and has a pressing surface that presses the locking member to engage with the engagement portion, and a tolerance surface that is closer to the shaft portion than the pressing surface and allows the locking member to slide; Equipped with A handrail device in which the cam member has a protruding surface between the pressing surface and the tolerance surface, the protruding surface being at a greater distance from the shaft portion than the pressing surface.

2. A handrail that can be fixed to and detached from a bracket; A locking member that is provided inside the handrail so as to be slidable along the extension direction of the handrail and is engageable with an engaging portion provided on the bracket; a cam member that is rotatably provided with respect to the handrail and has a pressing surface that presses the locking member to engage with the engagement portion, and a tolerance surface that is closer to the shaft portion than the pressing surface and allows the locking member to slide; Equipped with A handrail device comprising an operating portion provided on the locking member and protruding from the handrail.

3. The handrail device according to claim 2 , wherein the operation portion is accommodated in the handrail by being rotated from a state in which the operation portion protrudes from the handrail in a pressing direction of the locking member.

4. A handrail that can be fixed to and detached from a bracket; A locking member that is provided inside the handrail so as to be slidable along the extension direction of the handrail and is engageable with an engaging portion provided on the bracket; a cam member that is rotatably provided with respect to the handrail and has a pressing surface that presses the locking member to engage with the engagement portion, and a tolerance surface that is closer to the shaft portion than the pressing surface and allows the locking member to slide; Equipped with A handrail device comprising a biasing member that draws the locking member toward the cam member.

5. A handrail that can be fixed to and detached from a bracket; A locking member that is provided inside the handrail so as to be slidable along the extension direction of the handrail and is engageable with an engaging portion provided on the bracket; a cam member that is rotatably provided with respect to the handrail and has a pressing surface that presses the locking member to engage with the engagement portion, and a tolerance surface that is closer to the shaft portion than the pressing surface and allows the locking member to slide; Equipped with A handrail device, wherein the engagement portion is a recess that contracts in width relative to the locking member as the engagement portion moves in the pressing direction of the locking member.

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