JP2007138509A - Main rope middle support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a main rope middle support capable of simply attaching and detaching a main rope and changing the span of the main rope by the attachment and detachment. <P>SOLUTION: The main rope 25 extended between predetermined locations of a scaffold is supported in the middle part thereof. A mounting section 5 for mounting a support 3 on the scaffold in a detachable manner and a main rope engaging section 7 mounted to the mounting section 5 and inserted with the main rope 25 therein to support the main rope 25 are included. The main rope engaging section 7 is formed in a spiral shape extended in the direction of the extension of the main rope 25, and the spiral is set in a pitch larger than the diameter of the main rope 25. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a master rope intermediate support for supporting a master rope stretched between predetermined points in a scaffold such as a frame scaffold or a one-side scaffold, for example, between master rope struts.

  In a construction site such as a wooden house, a scaffold is usually installed before actual work such as construction work to improve workability, and one end of a safety belt or the like is attached to this scaffold to prevent a crash. Parent rope is stretched. In many cases, the horizontal master rope is fixed to a master rope support or a steel beam whose both ends are provided on a scaffold. And this horizontal master rope, when the span, that is, the distance between the support parts of the master rope such as this master rope support becomes long, the parent is engaged when the operator who engaged one end of the safety belt falls to this master rope. Since the rope may extend and the worker may collide with the floor surface or the like, an intermediate support for supporting the parent rope in the middle may be provided.

As a master rope intermediate support for supporting such a master rope in the middle, as shown in Patent Document 1, conventionally, a detachable clamp portion is provided on a support column of a scaffold, and an extension pipe is connected to the clamp portion. An annular portion is provided, and a parent rope is inserted into the annular portion to subdivide the span of the parent rope.
JP 2003-176632 A

  By the way, when working across such a master rope intermediate support, when moving to the next span, the safety belt must be re-attached to the master rope of the next span. In order to improve workability without performing it, it is preferable to set the span of the master rope long while considering safety. Moreover, from the viewpoint of preventing the friendship phenomenon at the time of dropping, it is a principle that one worker applies a safety belt to the master rope within one span.

  Therefore, when one worker uses a single parent rope, it is preferable to set the span of the parent rope as long as possible, depending on the situation, such as when multiple workers use it. In order to ensure safety and workability, it is preferable to change the span of the master rope.

  However, in the master rope intermediate support described in the above-mentioned Patent Document 1, the master rope is inserted through the annular portion to support the middle, so when changing the span of the master rope, After removing the fixed state of one end of the leash, the parent leash must be pulled out from the annular portion of the intermediate support, and this one end must be re-fixed to a predetermined place on the scaffold. Was annoying. Therefore, in practice, such a span changing operation is not performed, and the workability cannot be sufficiently improved, such as working with a short span.

  The present invention has been made in view of the above problems, and provides a master rope intermediate support that can easily attach and detach the master rope and can change the span of the master rope by this attachment and detachment. Objective.

  In order to solve the above-mentioned problems, a master rope intermediate support according to the present invention is a master rope intermediate support that supports a master rope stretched between predetermined portions of a scaffold in the middle thereof. A detachable attachment portion, and a parent rope engagement portion that is attached to the attachment portion and supports the parent rope by inserting the parent rope, and the parent rope engagement portion includes the parent rope engagement portion. It is formed in a spiral shape extending in the tensioning direction of the rope, and the pitch of the spiral is set so as to be able to be inserted through the parent rope.

  According to the present invention, the master rope engaging portion is formed in a spiral shape extending in the extending direction of the master rope, and the pitch of the spiral is set so that the master rope can be inserted. The master rope can be inserted into the spiral of the master rope engaging portion through the pitch of the spiral of the engaging portion. For this reason, when inserting the master rope into this master rope intermediate support, it is not necessary to bother to remove one end of the master rope that is stretched, and this master rope intermediate support can easily support the master rope. it can. In addition, since the master rope engaging portion is formed in a spiral shape extending in the direction in which the master rope is stretched, it is difficult to release the support state unless the master rope is supported and removed manually. Thus, the support state of the parent rope can be reliably maintained. Further, since the master rope engaging portion is attached to the attachment portion for detachably attaching the support tool to the scaffold, the master rope intermediate support tool can be attached to an arbitrary place of the scaffold. The mounting position can be changed accordingly.

  The helical pitch of the parent rope engaging portion is not particularly limited as long as the parent rope can be inserted. For example, it is set slightly smaller than the diameter of the parent rope, and the parent rope is elastically deformed to deform the parent rope. However, it is preferable that the pitch of the spiral of the master rope engaging portion is set to be equal to or larger than the diameter of the master rope.

  If comprised in this way, it will become easy to insert a master rope between the pitches of a master rope engaging part, and usability can be improved.

  The parent rope engaging portion is not particularly limited in its spiral shape, and may be formed in, for example, a substantially rectangular shape, a substantially circular shape, or the like when viewed from the spiral axis direction. The rope engaging portion is preferably formed in a substantially oval or substantially oval shape that is long in the vertical direction when viewed from the direction of the spiral axis.

  If constituted in this way, even if the parent rope vibrates up and down with the fall of the worker who hooked one end of the safety belt to the parent rope, the parent rope is surely supported while allowing this vibration to some extent. Can do.

  The master rope engaging portion may be fixed to the attachment portion, but is preferably attached to the attachment portion so as to be rotatable around an axis orthogonal to the spiral axis. Item 4).

  If constituted in this way, even if the master rope vibrates up and down with the fall of the worker who hooked one end of the safety belt to the master rope, the master rope engaging part also rotates with this vibration, The axial direction of the parent rope and the spiral axis of the parent rope engaging portion can be substantially coincided with each other, and the parent rope engaging portion can be prevented from unintentionally pulling out and more reliably and stably. Can be supported.

  According to the master rope intermediate support of the present invention, the master rope can be inserted into the spiral of the master rope engaging portion through the spiral pitch of the master rope engaging portion, and the master rope is inserted into the master rope intermediate support tool. There is an advantage that it is not necessary to remove one end portion of the stretched master rope, and this master rope intermediate support can easily support the master rope. Therefore, it is possible to support the master rope in the middle or to release the support state according to the situation by a simple operation. Moreover, after supporting the master rope, the support status cannot be released unless it is removed artificially, and the support status of the master rope can be reliably maintained. It can be attached to any place on the scaffold, and its attachment position can be changed according to the situation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is a key map showing the use situation of the master rope intermediate support of this embodiment. In addition, although the master rope intermediate | middle support 3 of this embodiment is demonstrated about the case where it applies to a frame scaffold, this intermediate support 3 is applicable also to other scaffolds, such as a one-sided scaffold.

  The scaffold 20 is formed over a plurality of layers by a building frame 21, a cloth frame 22 with a floor, a cross brace 23, and the like. On the uppermost layer of the scaffold 20, a master rope support 24 is erected on both ends thereof, and a horizontal master rope 25 is stretched between the master rope supports 24. The master rope support 24 is fixed to the building frame 21 by a mounting bracket (not shown), and one end portion of a lock rope 26 that pulls in a direction opposite to the direction in which the tensile force by the master rope 25 acts is attached to the tip. . The other end of the lock rope 26 is fixed to the front end of the building frame 21 disposed at a position one span away from the attachment position of the master rope support 24 (span of the building frame 21), thereby forming a brace. It is stretched. This holding line 26 may be formed in a series with the horizontal parent line 25, or may be formed separately and independently.

  The horizontal master rope 25 is constituted by a wire rope, a nylon rope, a vinylon rope, or the like, and its tension is adjusted by a tensioner 27. Although the master rope 25 varies depending on the size of the building frame 21, it is usually supported by 3 to 6 spans of the span of the building frame 21. In FIG. 1, the master rope support 24 is spaced apart by three spans, and the master rope 25 is stretched by attaching both ends of the master rope 25 to the tip of the master rope support 24.

  By the way, as for the operator who uses this master rope 25, one person is a principle in one span. Therefore, when two workers work on the same level, it is necessary to subdivide each span. In this embodiment, in order to subdivide the span of the master rope 25, the master rope intermediate support 3 is attached to the building frame 21 between the master rope supports 24, and the intermediate support tool 3 supports the middle of the master rope 25. It is configured to be.

  The master rope intermediate support 3 will be specifically described with reference to FIGS. 2 to 6. FIG. 2 is a perspective view showing the support device attached to the scaffold, and FIG. 3 is a perspective view showing the support device removed from the scaffold. 4 to 6 are a plan view, a front view, and a side view of the intermediate support.

  As shown in these drawings, the master rope intermediate support 3 is attached to the attachment part 4 for detachably attaching the support 3 to the building frame 21 of the scaffold 20, and to the master rope. 25 and a master rope engaging portion 7 that supports the middle of the master rope 25 and is attached to the building frame 21 at a predetermined height position via the attachment portion 4.

  The attachment portion 4 includes a pair of halves 41 and 42 that are hinged by a rotation shaft portion 43 that extends parallel to the axial direction of the building frame 21 as main components. The pair of halves 41 and 42 are formed such that the inner circumference follows the substantially outer circumference of the building frame 21 by matching.

  Of the halves 41 and 42, the first half 41 to which the master rope engaging portion 7 is attached has a reduced width (up and down in the figure) at the end opposite to the end where the rotating shaft 43 is provided. A bolt rotation shaft portion 45 substantially parallel to the rotation shaft portion 43 is provided in the reduced width portion 44. The bolt rotating shaft 45 is configured to pivotally support one end of the tightening bolt 46 in the longitudinal direction on the first half 41, and the bolt 46 is configured such that a nut 47 can be screwed to the tip.

  On the other hand, the second half 42 which is the other half of the halves 41 and 42 has a reduced width (vertical direction in the figure) at the end opposite to the end provided with the rotating shaft 43. A notch 49 through which the bolt 46 can be inserted is provided at the tip of the reduced width portion 48 and at a height corresponding to the bolt 46.

  Then, when the mounting portion 4 is attached to the building frame 21, the building frame 21 is sandwiched between the halves 41, 42, and the bolt 46 is rotated around the bolt rotation shaft portion 45, and the front end thereof. In this state, the nut 47 is screwed onto the tip of the bolt 46, and the nut 47 is tightened and pressure-bonded to the peripheral edge of the notch 49. The bodies 41 and 42 are configured to be sandwiched between the building frames 21. Each of the halves 41 and 42 is formed in a U shape in cross section or a bead is formed in order to improve the strength.

  On the other hand, the master rope engaging portion 7 is fixed to the outer surface of the first half body 41 by welding or the like. The master rope engaging portion 7 is formed in a spiral shape extending in the extending direction of the master rope 25, and the pitch P (see FIG. 6) of the spiral is set to be equal to or larger than the diameter of the master rope 25.

  Specifically, the master rope engaging portion 7 winds a steel rod-like body having a predetermined thickness in a spiral shape around an axis (spiral axis) extending in parallel with the extending direction of the master rope 25. The pitch P of the spiral is set to be approximately equal to or slightly larger than the diameter of the parent rope 25. Although this pitch P should just be set more than the diameter of the master rope 25, in order to prevent accidental extraction of the master rope 25 more reliably, it is substantially the diameter of the master rope 25 like this embodiment. It is preferable that the dimensions are set to be equivalent or slightly larger (about 1.5 times the diameter of the master rope 25). In the present embodiment, the number of times this spiral is wound is set to about one and a half, and as shown in FIGS. 5 and 6, each end is directed in the opposite direction. .

  The shape of the master rope engaging portion 7 will be described more specifically with reference to FIGS. As shown in FIG. 5, the master rope engaging portion 7 includes straight portions 71, 72, 73 formed in a substantially linear shape, and curved portions 74, 75 provided continuously to the straight portions 71, 72. It is formed in a substantially oval shape elongated in the vertical direction when viewed from the spiral axis direction. That is, as shown in FIG. 5, the master rope engaging portion 7 includes a first straight portion 71 extending in parallel with the axial direction of the attachment portion 4 and having an upper end directed substantially upward, and a lower end of the first straight portion 71. A first curved portion 74 that is continuously provided and curved in a U-shape, and a second straight portion 72 that is provided continuously with the other end portion of the first curved portion 74 and extends substantially parallel to the first straight portion 71. And a second bending portion 75 that is connected to the upper end portion of the second linear portion 72 and curves in an inverted U shape, and is connected to the other end portion of the second bending portion 75 and the first A third straight line portion 73 extending in parallel with the straight line portion 71 is provided, and the second straight line portion 72 is welded to the outer surface of the attachment portion 4.

  In the present embodiment, the first and third straight portions 71 and 73 are formed to be slightly tilted toward the attachment portion 4 toward the free end portion, thereby more reliably preventing the accidental withdrawal of the master rope 25. It has been made. In addition, the free end portions of the first and third straight portions 71 and 73 may be slightly curved toward the attachment portion 4 to further prevent the master rope 25 from being accidentally pulled out.

  Next, the usage method of this master rope intermediate support 3 is demonstrated. First, the master rope 24 is erected on the scaffold 20, and the master rope 25 is stretched between the parent ropes 24. Further, as shown in FIGS. 7A and 7B, the master rope intermediate support 3 is a building frame 21 disposed between the master rope struts 24, and the extension height of the master rope 25. Install in position. Since the method of attaching the intermediate support 3 to the building frame 21 has been described above, the description thereof is omitted here.

  When the worker W works on the scaffold 20, the hook 30 attached to one end of the safety belt 28 via the lifeline 29 is engaged with the master rope 25 as shown in FIG. In this case, the master rope 25 stretched between the master rope struts 24 is not supported by the intermediate support 3 in the middle thereof. In this case, the position of the intermediate support 3 is set so as not to interfere with the master rope 25.

  In such a state, the worker W can freely move between the master rope support columns 24 and can work efficiently without the trouble of changing the hook 30.

  On the other hand, when the hooks 30 of two workers W are engaged with the single master rope 25, one worker W is in principle one span of the master rope 25. As shown in FIG. 7B, the middle of the master rope 25 is supported by the master rope intermediate support 3, and the worker W is arranged in each span subdivided by this intermediate support 3.

  The parent rope 25 is supported by the parent rope intermediate support 3 by pulling the parent rope 25 to have some slack, inserting this slack portion into the pitch P of the parent rope engaging portion 7, and Is performed by getting over each end of the master rope engaging portion 7 oriented in the vertical direction and inserting the master rope 25 inside the master rope engaging portion 7.

  Alternatively, the master rope intermediate support tool 3 is removed from the building frame 21, and the master rope 25 is first inserted into the master rope engaging portion 7 of the intermediate support tool 3, and then the mounting frame 4 is used to set the building frame 21 at a predetermined height position. By attaching, the master rope 25 is supported by the intermediate support 3.

  Thus, since the single master rope 25 can be divided into a plurality of spans by the master rope intermediate support 3, one of the workers W has crashed as shown by the two-dot chain line in FIG. 7B, for example. Even in this case, the friendship phenomenon can be effectively prevented. Moreover, when there is only one operator W who engages the hook 30 with the master rope 25, the master rope 25 can be easily extracted from the master rope engaging portion 7 of the intermediate support 3. The worker W can move over a wide range, and the workability can be improved.

  That is, according to the master rope intermediate support 3, the master rope engaging portion 7 is formed in a spiral shape extending in the extending direction of the master rope 25, and the pitch of this spiral is set to be equal to or larger than the diameter of the master rope 25. Therefore, the master rope 25 can be artificially easily inserted into the spiral through the spiral pitch of the master rope engaging portion 7, and when it is desired to increase the span, the master rope engaging portion 7 and the master rope 25 can be easily removed artificially. For this reason, when the master rope 25 is inserted into the master rope intermediate support 3, it is not necessary to bother to remove the end of the master rope 25 stretched from the master rope support 24. 3, the master rope 25 can be easily detached.

  And since this master rope engaging part 7 is formed in the spiral shape extended in the extending direction of the master rope 25, after supporting the master rope, if it is not removed artificially, the support state will be cancelled | released. Is difficult, and the support state of the master rope 25 can be maintained. Further, since the master rope engaging portion 7 is attached to the attachment portion 4 for detachably attaching the support tool 3 to the scaffold 20, the attachment position of the master rope intermediate support tool 3 is set at a predetermined position of the scaffold 20, for example, It can be moved to the adjacent building frame 21 in FIG. 7B and can be changed according to the situation.

  In addition, the master rope intermediate support tool 3 demonstrated above is one Embodiment of the master rope intermediate support tool 3 which concerns on this invention, Comprising: The specific structure of this support tool 3 does not deviate from the meaning of this invention. Modifications can be made as appropriate within the scope, and modifications will be described below.

  (1) In the above embodiment, the master rope engaging portion 7 is fixed to the outer surface of the attachment portion 4 by welding, but this fixing method is not particularly limited, and is fixed by other means. It may be.

  Moreover, it may replace with this fixing means and may be comprised so that a master rope engaging part may be attached to an attachment part so that rotation around the axis | shaft orthogonal to the spiral axis is possible. That is, the master rope engaging part may be provided with a shaft orthogonal to the spiral axis, and this shaft may be rotatably attached to the attachment part. In this case, an anti-extraction means is provided on the shaft so that the axis does not accidentally come off the mounting portion.

  (2) In the above embodiment, the master rope engaging part 7 is formed so that the number of times the spiral is wound is set to about one and a half and each end part is directed in the opposite direction. The specific configuration of the master rope engaging portion including the number of times of spiral winding is not particularly limited. For example, the number of times of spiral winding may be set to two or more. In order to easily attach and detach the master rope 25 while stably and reliably supporting 25, it is preferable to be configured as in this embodiment.

  (3) In the above embodiment, the master rope engaging portion 7 of the master rope intermediate support 3 is formed in a substantially oval shape that is elongated vertically when viewed from the spiral axis direction. The shape is not particularly limited, and may be formed in an elliptical shape, a true circular shape, a rectangular shape, or the like. However, when the shape when viewed from the direction of the spiral axis is a substantially oval or oval shape elongated in the vertical direction, the parent rope is allowed to vibrate up and down to some extent and prevents the parent rope from being unintentionally pulled out. be able to.

  (4) In the above embodiment, the master rope 25 is stretched on the uppermost floor portion of the scaffold 20, but the hierarchy on which the parent rope 25 is stretched is limited to the uppermost floor. For example, the master rope 25 may be stretched in an intermediate hierarchy excluding the uppermost floor, and in this case as well, the middle of the parent rope 25 is supported by the parent rope intermediate support tool 3 in the same manner as the uppermost floor. It may be a thing.

It is a conceptual diagram which shows the use condition of the master rope intermediate support tool which concerns on one Embodiment of this invention. It is a perspective view shown in the state where the intermediate support was attached to the building frame. It is a perspective view which shows the state which removed the intermediate support tool from the building frame. It is a top view of the intermediate support tool. It is a front view of the intermediate support tool. It is a side view of the intermediate support tool. It is explanatory drawing which shows the use condition of the intermediate support tool.

Explanation of symbols

P Pitch 3 Master rope intermediate support 4 Mounting part 7 Master rope engaging part 21 Building frame 24 Parent rope support 25 Master rope 41 First half split 42 Second half split

Claims (4)

In a master rope intermediate support for supporting a master rope stretched between predetermined locations of the scaffold in the middle thereof, an attachment portion for detachably attaching the support tool to the scaffold, and the attachment portion attached to the attachment portion and the above A master rope engaging part for inserting the master rope and supporting the master rope,
The master rope intermediate support tool, wherein the master rope engaging portion is formed in a spiral shape extending in a direction in which the master rope is stretched, and a pitch of the spiral is set so that the master rope can be inserted.   The master rope intermediate support according to claim 1, wherein the master rope engaging portion has a helical pitch set to be equal to or larger than a diameter of the master rope.   3. The master rope intermediate support according to claim 1, wherein the master rope engaging portion is formed in a substantially elliptical shape or a substantially elliptical shape which is long in the vertical direction when viewed from the spiral axis direction. Ingredients.   The master rope intermediate portion according to any one of claims 1 to 3, wherein the master rope engaging portion is attached to the attachment portion so as to be rotatable around an axis orthogonal to a spiral axis. Support tool.

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