JP2015209719A - Longitudinal member fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a longitudinal member fixing device capable of easily attaching a longitudinal member to a fixed part.SOLUTION: A longitudinal member fixing device 10 for fixing a longitudinal member to a step board 31 having a prescribed thickness includes a cylindrical member retaining part 11 having a space into which the longitudinal member can be inserted, and a fixing part 20 integrally provided with the member retaining part 11 and having cam members 27 and 28 rotatable around a prescribed shaft 25. The cam members 27 and 28 can retain either a first position having a first clearance with respect to a portion for retaining the step board 31 or a second position having a second clearance narrower than the first clearance. The fixing part 20 includes a spring 29 for energizing the gap between the cam members 27 and 28 and the step board 31 to the second position. By pushing the cam members 27 and 28 to the step board 31 against the energizing force of the spring 29, the longitudinal member fixing device 10 is fixed to the step board 31.

Description

  The present invention relates to a longitudinal member fixing device, and more particularly, to a longitudinal member fixing device capable of easily attaching a longitudinal member to a fixed portion having a predetermined thickness.

  Conventionally, temporary stairs and handrails are provided at construction sites. Such a temporary handrail post mounting tool is disclosed in, for example, Japanese Patent Laid-Open No. 2008-255589 (Patent Document 1). According to Patent Document 1, a post attachment tool for a temporary handrail is fixed to one side of a hollow member formed in a hollow shape and the hollow member, and the object to be erected is clamped at a plurality of locations in the width direction of the temporary handrail. A fixed clamp portion that is fixed to the other side of the hollow member, and a column clamp portion that clamps the column. As a result, there are provided a column attachment tool for a temporary handrail and a method for forming the temporary handrail that can temporarily provide a handrail that is unlikely to interfere with the construction work.

Japanese Patent Laid-Open No. 2008-255689

  Conventional temporary handrails are configured as described in the background art. In order to attach the handrail, it was necessary to attach a plurality of fixed clamp portions to the fixed member. In this case, it is necessary to manually tighten a plurality of bolts for each fixed clamp portion, and the labor and labor are considerable.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a longitudinal member fixing device capable of easily attaching a longitudinal member such as a temporary handrail to a predetermined fixed portion. And

  The longitudinal member fixing device according to the present invention is a longitudinal member fixing device that fixes the longitudinal member to a fixed portion having a predetermined thickness. The longitudinal member fixing device includes a member holding portion having a space into which the longitudinal member can be inserted, and a fixing portion having a cam member provided integrally with the member holding portion and rotatable about a predetermined axis. The cam member can hold either a first position having a first interval with respect to a portion that holds the fixed portion, or a second position having a second interval that is narrower than the first interval. The fixing portion includes biasing means for biasing the cam member so as to hold the second position.

  Preferably, a plurality of convex portions are provided on the bottom of the arcuate member facing the fixed portion of the cam member.

  A plurality of cam members may be provided along the axis.

  Preferably, each cam member is provided with a biasing means, and a plurality of cam members are operated simultaneously.

  The cam member has a lever that opposes the urging force of the urging means and operates the cam member so as to hold the first position.

  The cam member preferably includes an arc-shaped member, and the arc-shaped member preferably has a shape that becomes narrower in order from the first position to the second position.

  The cam member is provided in the first direction of the member holding portion, the space extends in the second direction intersecting with the first direction, and the longitudinal member extends in the third direction intersecting with the first direction and the second direction. Alternatively, the cam member is provided in the third direction of the member holding portion, the space extends in the first direction intersecting with the third direction, and the longitudinal member is in the direction opposite to the cam member in the third direction. It may extend.

  The longitudinal member may extend in a direction crossing the first direction, or may extend in the first direction.

  The cam member can be fixed to the fixed portion by pushing the cam member against the predetermined fixed portion and widening the gap against the urging force of the urging means.

  As a result, it is possible to provide a longitudinal member fixing device capable of easily attaching a longitudinal member such as a temporary handrail to a predetermined fixed portion.

  Further, if a plurality of convex portions or the like are provided at the bottom of the arcuate member facing the fixed portion of the cam member, the long member fixing device bites into the fixed portion and is difficult to come off.

It is a perspective view of a longitudinal member fixing device. In FIG. 1, it is a top view of the part shown by arrow II-II. In FIG. 1, it is a side view of the part shown by arrow III-III. It is a figure which shows a spring. It is a figure which shows the cam which has a lever. It is a figure which shows the cam which does not have a lever. It is a front view at the time of using a longitudinal member fixing apparatus for the handrail support | pillar of a staircase. It is a figure which shows the edge part of the handrail support | pillar at the time of using a longitudinal member fixing apparatus for the handrail support | pillar of a staircase. It is a front view at the time of using a longitudinal member fixing apparatus for the handrail of a flat stage. It is a figure which shows other embodiment of this invention. It is a front view which shows the specific usage example of embodiment of this invention. It is a top view which shows the specific usage example of embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a longitudinal member fixing device according to an embodiment of the present invention. Here, in order to facilitate understanding, a part is broken away. 2 is a plan view of the portion indicated by arrow II-II in FIG. 1, and FIG. 3 is a side view of the portion indicated by arrow III-III in FIG.

  Here, the case where the elongate member fixing device 10 is used to attach a handrail to a temporary staircase or the like at a construction site will be described. Specifically, a temporary tread is provided in the temporary staircase, and the longitudinal member fixing device 10 is fixed to the tread.

  1 to 3, a longitudinal member fixing device 10 extends in the vertical direction (third direction) in the figure, and has a cylindrical member 11 having a bottom, and a radial direction (first direction) of the cylindrical member 11. And a fixing portion 20 for fixing to a fixed portion such as a tread 31 provided outside. The fixing part 20 has a rectangular cross section, and a tread (fixed part) 31 having a certain thickness extending in the lateral direction (second direction) can be sandwiched in the center in the longitudinal direction. A rectangular tube 21 having an inverted “U” -shaped space 24 having an opening, a shaft member 25 provided between the sides 21 a and 21 b of the rectangular tube 21 facing in the second direction, and a shaft member A pair of cams 27 and 28 having a circular arc portion in the downward direction and a pair of cams 27 and 28 are provided on the shaft 25 so as to be rotatable about the shaft member 25 with a space therebetween in the axial direction of 25. On the other hand, a spring 29 as urging means for urging in a direction away from the cylindrical member 11 is included. The pair of cams 27 and 28 may be provided with a lever that faces the biasing force of the spring 29 and positions the pair of cams 27 and 28 on the cylindrical member 11 side with respect to the shaft 25. Here, the configuration including the cams 27 and 28 is referred to as a cam member.

  The cylindrical member 11 is not limited to the bottom as long as it can hold a handrail post inserted into the cylindrical member 11 and may be provided with a catch portion. Further, the shape may not be a cylindrical shape. The square tube may be formed into a square shape by sheet metal.

  Although the pair of cams 27 and 28 are provided here, the present invention is not limited to this, and only one may be provided. In addition, when a pair of cams 27 and 28 are provided, even if variations in the thickness and surface condition of the cams 27 and 28 and the tread arise due to an overall error during assembly due to individual component errors during manufacturing, the cam 27 , 28 can bite into the fixed portion such as a tread.

  In addition, after the temporary installation, the handrail is removed, and a decorative board is mounted on the tread board to form the main stairs.

  The spring 29 has a configuration in which a pair of springs wound in opposite directions are connected at the center, and the connecting portion 29a abuts on the side 21c of the square tube 21 away from the cylindrical member 11. The opposite end portions 29b are engaged with the side surfaces of the arc members 27b, 28b of the cams 27, 28 on the cylindrical member 11 side.

  Note that the pair of springs may not be connected.

  A specific shape of the spring 29 is shown in FIG. FIG. 4A shows a front view when the central portion of the spring 29 faces upward, and FIG. 4B shows a side view of the spring. 4A and 4B, a natural state where no force is applied to the spring is indicated by a solid line, and a state where an urging force is applied to the spring is indicated by a two-dot chain line.

  The end of the spring 29 opposite to the connecting portion 29a is engaged with the ends of the arc-shaped members 27b and 28b of the cams 27 and 28.

  In addition, although the example which used the coil spring as an urging | biasing means was given and demonstrated here, it is not restricted to this, Other springs etc. may be sufficient.

  Here, an example in which the lever 27a is provided is shown. The lever 27a is provided on the opposite side of the arc member 27b of the cam 27, and by operating the lever 27a in the direction away from the cylindrical member 11, the gap becomes wider as shown by the dotted line in FIG.

  When the cam member is mounted, the longitudinal member fixing device 10 is fixed to the tread 31 by pushing it into the tread 31 so that the operator widens the gap against the urging force of the spring 29 by human power.

  FIG. 5 is a view showing a cam 27 having a lever 27a, FIG. 5 (A) is a front view (viewed from the same direction as FIG. 3), and FIG. 5 (B) is a view in FIG. It is an arrow line view which shows the part shown by arrow VB-VB. 5A and 5B, the cam 27 has a shaft hole 27d that allows the shaft member 25 to pass therethrough, has a lever 27a that extends obliquely upward on one side of the shaft hole 27d, and the other side. A circular arc member 27b is provided on the side.

  A cylindrical protrusion 27 e is provided on one side surface of the cam 27. The protrusion 27e is provided to rotate the cam 27 in synchronization with the cam 28. Details will be described later.

  A plurality of convex portions are provided on the lower surface 27c of the arcuate arc member 27b. This is for increasing the frictional force with the arc-shaped members 27b of the cams 27, 28 when the cams 27, 28 are mounted on the tread plate 31, and a plurality of continuous grooves are parallel to the shaft member 25. You may provide, and you may provide both.

  The cam 27 includes a smooth arc-shaped arc member 27b, but may have a stepped configuration with different radial dimensions discontinuously.

  If there are a plurality of protrusions and / or grooves, once the longitudinal member fixing device 10 is pushed into the tread 31 and inserted into the tread 31, the longitudinal member fixing device 10 will bite into the tread 31. No longer separated from the tread 31.

  6 is a view showing the cam 28 having no lever, FIG. 6 (A) is a front view (viewed from the same direction as FIG. 3), and FIG. 6 (B) is a view in FIG. 6 (A). FIG. 6 is an arrow view showing a portion indicated by arrows VIB-VIB. With reference to FIGS. 6A and 6B, the cam 28 is basically the same as the cam 27 shown in FIGS. 5A and 5B except that the cam 28 does not have the lever 27a. .

  On one side surface of the cam 28, a pair of rectangular parallelepiped projections 28e and 28f are provided toward the shaft hole 28d. The pair of protrusions 28e and 28f are arranged so as to sandwich the protrusion 27e shown in FIG. 5, whereby the cams 27 and 28 are simultaneously rotated in the same direction. FIG. 3 shows the engagement state of these elements in the cams 27 and 28.

  The joint portion of the fixed portion 20 with the cylindrical member 11 may be bent along the outer periphery of the cylindrical member 11.

  Next, a method for fixing the longitudinal member fixing device 10 to the tread 31 will be described. Referring to FIG. 3, the arc members 27b and 28b at the lower ends of the cam members 27 and 28 have a short diameter from the shaft member 25 to the arc members 27b and 28b on the side away from the cylindrical member 11, and are cylindrical members. It is comprised so that it may become long in order as it reaches the edge part of 11 side. As a result, the state shown by the solid line in the figure, that is, the bottom surface of the arc-shaped members 27b and 28b at the lower ends of the space 24 (the portion that holds the tread) 21d and the cam members 27 and 28 is normally applied by the biasing force of the spring 27c and 28c are held so that the gap between them becomes narrow. On the other hand, when the lever 27a is actuated in the direction opposite to the biasing force of the spring 29, the gap increases as shown by the dotted line in the figure, and the lowermost ends of the cam members 27b and 28b and the lower surface of the recess when the gap is maximized. The gap from 21d is the dimension a shown in the figure. On the other hand, when the gap is the smallest, the dimension is b.

  Therefore, any tread having a thickness of a to b can be held in this gap. Moreover, even if it is going to remove the elongate member fixing apparatus 10 currently fixed to the tread board 31, since a clearance gap becomes narrow, it will not come off.

  In this way, when the tread is sandwiched between the spaces 24, the unevenness provided on the cams 27 and 28 is formed in such a direction that the treads are not separated from the space 24, so that the longitudinal member fixing device 10 is not separated from the tread.

  Next, the case where this longitudinal member fixing device 10 is used as a temporary handrail for a staircase at a construction site will be described. FIG. 7 is a front view of the handrail in this case. Here, the handrail can be expanded and contracted, and FIG. 7A shows a case where the handrail is shortened, and FIG. FIG. 8 is an arrow view of the portion indicated by VIII-VIII in FIG. In FIG. 8B, illustration of the tread 31 is omitted.

  Referring to FIGS. 7A, 7B and 8, a temporary handrail 40 for stairs is made of a steel pipe, and cylindrical handrail struts 41, 42 extending in the vertical direction, and a cylindrical handrail strut 41 , 42 is formed of a cylindrical pipe that connects the upper end portion and the intermediate portion thereof, and a connection reinforcement 43 that connects the handrail 45 and the intermediate portion 46 between both ends. Including. The handrail 45 and the middle door 46 have built-in handrail portions 45b and 46b formed by handrails 45a and 46a and handrail pillars having a diameter smaller than that of each handrail body.

  The upper end portion of the handrail post 41 and the upper handrail 45 are smoothly connected, and the upper end portion of the handrail post 42 and the extension handrail portion 45b are smoothly connected.

  The middle section 46 is connected to the central portion of the handrail column 41, and the extension 46 b of the middle section 46 is connected to the middle portion of the handrail column 42.

  Next, the case where this elongate member fixing device 10 is used as a temporary handrail for an opening generated in a portion where a staircase at a construction site is attached will be described. FIG. 9 is a front view of the handrail in this case. Again, the handrail can be expanded and contracted, and FIG. 9A shows the case where the handrail is shortened, and FIG.

  With reference to FIGS. 9A and 9B, the temporary handrail for the opening at the construction site is the same as that for the staircase except that the handrail is horizontal, and the description thereof is omitted.

  7 to 9 show a state where the longitudinal member fixing device 10 is engaged with the tread plate 31 or a state where it is about to be engaged.

  A specific use example of the longitudinal member fixing device 10 will be described later with reference to FIG.

  Next, a longitudinal member fixing device 50 according to another embodiment of the present invention will be described. FIG. 10A shows a front view of a specific configuration of this embodiment, and FIG. 10B shows an arrow view of a portion indicated by arrows XB-XB in FIG. 10A. This embodiment is different from the previous embodiment in that the longitudinal member fixing device 50 is fixed to a sasara girder having a predetermined thickness protruding from below.

  Referring to FIGS. 10A and 10B, a longitudinal member fixing device 50 according to this embodiment protrudes from below in a cylindrical member 61 extending in the vertical direction in the drawing and a lower portion of the cylindrical member 61. And a fixing portion 70 for fixing to a plate-like member. As shown in FIG. 10B, here, a pair of trapezoidal reinforcing plates are provided so as to sandwich the cylindrical member 61, but this may be omitted.

  In this embodiment, the basic configuration is the same as that of the previous embodiment except that the space 74 of the fixing portion 70 is open downward.

  That is, in this embodiment, the opening is downward (third direction) so that the sasara girder 31 having a certain thickness can be sandwiched in the central portion of the longitudinal direction extending in the lateral direction (horizontal direction). A square tube 71 having a “U” -shaped space 74 having a section, and a square tube 71 provided between two opposing sides extending in a direction perpendicular to the paper surface (second direction). A shaft member 75, a pair of cams 77, 78 that are pivotable about the shaft member 75 and spaced apart from each other in the axial direction of the shaft member 75, and have a downward arcuate portion, And a spring (not shown) that urges the cams 77 and 78 upward with respect to the shaft 75.

  Since the configuration and arrangement of the spring are basically the same as those of the previous embodiment, the description thereof is omitted here.

  Next, specific usage examples of the above and other embodiments will be described. FIG. 11 is a diagram showing a specific usage example of the longitudinal member fixing devices 10 and 50 according to the above-described embodiments, and is a diagram showing the vicinity of the stairs from the first floor to the second floor at the construction site. 11A is a side view, and FIG. 11B, FIG. 11C, and FIG. 11D are arrows XIB-XIB, XIC-XIC, and FIG. It is an arrow view of the part shown by XID-XID.

  Referring to FIGS. 11A to 11D, a temporary handrail using the longitudinal member fixing devices 10 and 50 is provided in the vicinity of the stairway 80 from the first floor to the second floor at the construction site. Here, in order to show a plurality of usage examples, the staircase 80 is parallel to the step board 82 and a portion having a pair of inclined sara girders 80a extending in an oblique direction so as to hold both end faces of the step board 31 of the staircase. A portion 80b having a stepped Sasara girder having a vertical portion and a vertical portion is provided. A handrail support 85 a is provided on the stairs 80.

  In order to provide the staircase 80, an opening 83 is provided on the floor surface of the second floor, and a handrail (not shown) is provided around the opening 83 to prevent an operator from falling on the staircase 80. Is provided. In order to hold these handrails, the longitudinal member fixing devices 10 and 50 are provided.

  First, a usage example of the longitudinal member fixing device 10 will be described. Referring to FIG. 11A, the longitudinal member fixing device 10 is fixed to the end face of the second-stage tread 82 from the first floor of the stairs 80. The longitudinal member fixing device 10 holds a handrail column 85a extending in the vertical direction to support the handrail.

  Referring to FIG. 11B, the longitudinal member fixing device 10 is attached to the flange of the H-shaped steel 87 that supports the floor 84 on the second floor, and this is the longitudinal direction (upward direction) for supporting a handrail (not shown). ) Is held.

  Referring to FIG. 11C, the longitudinal member fixing device 10 is attached to both ends of the tread plate 82 of the staircase 80, whereby the handrail support column 85a is held.

  In addition, referring to FIG. 11D, the longitudinal member fixing devices 50 are attached to both ends of the staircase-shaped sasara beam 80b of the staircase 80, whereby the handrail column 86b is held.

  Next, a usage example of the longitudinal member fixing device 50 will be described. Here, the longitudinal member fixing device 50 is provided at the inclined upper end portion of the inclined sasara beam 80a, and the longitudinal member fixing device 50 extends perpendicularly to the inclined Sasara beam 80a and moves upward in the middle. The handrail support 86a bent to the right is held.

  Further, the longitudinal member fixing device 50 is provided at an upper end portion of a portion parallel to the tread of the step-like sasher girder 80b, and holds a handrail column 86b extending straight upward.

  Next, the plane of the temporary staircase shown in FIG. 11 will be described. Here, unlike FIG. 11, a folded stairs having a landing in the middle will be described. FIG. 12 is a plan view of a temporary staircase in this case. FIG. 12A is a plan view showing an opening 89 from the first floor to the second floor where a staircase is provided, and FIG. 12B is a plan view showing a temporary staircase. Referring to FIGS. 12A and 12B, the staircase 90 includes, in order from the first floor, diagonal handrails 91 and 92 provided on both sides, and horizontal handrails 93 to 92 provided only on the outside of the landing. 96, an oblique handrail 97 provided only inside is provided. Each of the handrails 91 to 97 is supported by handrail support columns 91a, 91b, 92a, 92b,... 97a, 97b provided at both ends. A longitudinal member fixing device 10 is provided at the lower end of each handrail column, and is attached to both ends of the tread plate of the stairs 90.

  In addition, horizontal handrails 101 to 107 are provided in close proximity to each other in the opening 89 on the second floor where the staircase 90 is provided so as to surround the periphery of the opening 89. Each of the handrails 101 to 107 is supported by handrail support columns 101a, 101b, 102a, 102b,... 107a, 107b provided at both ends. A longitudinal member fixing device 10 is provided at the lower end portion of each handrail support column, and these are attached to an H-shaped steel for supporting the opening 89 on the second floor.

  Since this attachment state is the same as that in FIG. 11B, description thereof is omitted.

  As described above, in this embodiment, the longitudinal member fixing device 10 is attached to a member extending in the lateral direction, and the longitudinal member fixing device 50 is attached to a member extending in the longitudinal direction. Moreover, the handrail support | pillar inserted in the cylindrical members 11 and 61 of these elongate member fixing devices 10 and 50 may extend straight, and may be bent on the way.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The longitudinal member fixing device according to the present invention can be effectively used as a longitudinal member fixing device because a longitudinal member such as a handrail column or a main rope column of a temporary handrail can be easily attached to a predetermined fixed portion.

  10, 50 Longitudinal member fixing device, 11, 61 Cylindrical member, 20, 70 Fixing part, 21, 71 Square tube, 24 Space, 25 Shaft member, 27, 28 Cam, 27a Lever, 27b, 28b Arc-shaped member, 27c, 28c Lower surface, 27d, 28d Shaft hole, 29 Spring, 29a Connection part, 29b End part, 31 Tread.

Claims (8)

A longitudinal member fixing device for fixing a longitudinal member to a fixed part having a predetermined thickness,
A member holding part having a space into which the longitudinal member can be inserted;
A fixed portion having a cam member provided integrally with the member holding portion and rotatable about a predetermined axis;
The cam member has one of a first position having a first interval with respect to a portion holding the fixed portion and a second position having a second interval narrower than the first interval. Holdable,
The fixing portion includes a biasing unit that biases the cam member so as to hold the second position.   The longitudinal member fixing device according to claim 1, wherein a plurality of convex portions are provided at a bottom portion of the arc-shaped member facing the fixed portion of the cam member.   The longitudinal member fixing device according to claim 1, wherein a plurality of the cam members are provided along the axis. Each of the cam members is provided with the biasing means,
The longitudinal member fixing device according to claim 3, wherein the plurality of cam members are operated simultaneously.   The longitudinal member fixing according to any one of claims 1 to 4, wherein the cam member has a lever that opposes the urging force of the urging means and operates the cam member to hold the first position. apparatus.   The longitudinal member fixing device according to claim 1, wherein the cam member includes an arc-shaped member, and the arc-shaped member has a shape that narrows in order from the first position to the second position.   The cam member is provided in a first direction of the member holding portion, the space extends in a second direction intersecting the first direction, and the longitudinal member is a third intersecting in the first direction and the second direction. The longitudinal member fixing device according to claim 1, which extends in a direction.   The cam member is provided in a third direction of the member holding portion, the space extends in a first direction intersecting the third direction, and the longitudinal member is opposite to the cam member in the third direction. The longitudinal member fixing device according to any one of claims 1 to 6, which extends in the direction.

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