JP2011121780A - Rotating storage type handrail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To store a handrail for connecting a safety belt rope into an inner side of a jib by simple work. <P>SOLUTION: A rotation side handrail mounting bracket 35 to be attached with a handrail body 20 can rotate around a shaft of a jib vertical member 15. By this, the handrail body 20 can be stored into an inner side from an outer side of the jib 10 by simple work. Accordingly, in comparison to not being able to carry out such storage, work time and labor required for assembly and disassembly of the jib 10 can be saved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotary retractable handrail attached to a jib longitudinal member of a lattice structure jib to connect a safety belt rope.

  Conventionally, a crane equipped with a lattice structure jib that can be assembled and disassembled is known (for example, Patent Document 1). When assembling and disassembling such a crane, it is often necessary for an operator to stand on the upper surface of the jib. Since the upper surface of the jib may be 2 meters or more above the ground, the worker uses a safety belt (safety belt). This safety belt is used by being connected to a safety belt rope stretched between handrails. FIG. 13 shows the handrail 101 and the safety belt rope 114 attached to the lattice-shaped jib 110.

  In addition, a scaffold is equipped on the upper surface of the jib. Furthermore, in order to prevent the winding wire rope and the jib undulating wire rope from rubbing the upper surface of the jib, cable rollers having their moving range width are mounted on the upper surface of the jib. In addition, a support rope (boom guy line) is placed on the upper surface of the jib during assembly and disassembly.

  Since various objects are placed on the upper surface of the jib in this way, it may be necessary to attach the handrail to the outside of the jib. Therefore, as shown in FIGS. 14 and 15, a handrail mounting bracket 130 is attached to the outside of the jib main pillar (the jib vertical member 115) using U-bolts 130 u, and the handrail (handrail main body 120 is attached to the handrail mounting bracket 130. ) Was attached.

JP 11-139772 A

  However, the above technique has the following problems. The jib 110 needs to be a size within the transport limit width. Therefore, when the jib is the maximum size within the transport limit width, the transport limit width is exceeded when the handrail 101 is attached to the jib. In this case, it is necessary to remove the U-bolt 130u and remove the handrail 101 (the handrail main body 120 and the handrail mounting bracket 130) from the jib 110, which takes time and labor.

  An object of the present invention is to provide a handrail (rotary retractable handrail) that can be stored inside the jib by a simple operation.

  A rotary retractable handrail according to a first aspect of the present invention is a handrail attached to a jib vertical member of a lattice structure jib for connecting a safety belt rope, and the handrail main body and the handrail main body are attached to the jib vertical member A handrail mounting bracket, and the handrail mounting bracket is fixed to the jib longitudinal member, and is attached to the outside of the fixed handrail mounting bracket and the handrail main body is mounted. A rotation-side handrail mounting bracket that is rotatable around the axis of the jib longitudinal member.

  In this rotary retractable handrail, the rotation-side handrail mounting bracket to which the handrail main body is attached can rotate around the axis of the jib vertical member. Therefore, the handrail main body can be stored from the outside to the inside of the jib by a simple operation. Therefore, compared with the case where it cannot store in this way, the work time required for assembly and disassembly of a jib can be shortened and labor can be saved.

  Further, in this rotary retractable handrail, the rotating handrail mounting bracket is attached to the outside of the fixed handrail mounting bracket fixed to the jib vertical member. Therefore, the rotation-side handrail mounting bracket is restricted from moving in the axial direction of the jib longitudinal member.

  As described in the above description, the present invention enables the handrail body to be stored inside the jib by a simple operation, particularly by the configuration in which the rotation-side handrail mounting bracket is rotatable around the axis of the jib longitudinal member, and the work time can be reduced. Shortening and labor saving are possible.

It is a top view of a jib. It is a front view of the jib shown in FIG. It is a front view of the handrail mounting bracket periphery shown in FIG. FIG. 4 is a right side view around the handrail mounting bracket shown in FIG. 3. It is a top view of the handrail attachment bracket at the time of work, and is a F5 arrow line view shown in FIG. FIG. 6 is a view corresponding to FIG. 5 when the handrail body is stored. It is a top view which shows a fixed side handrail attachment bracket. It is a front view which shows a fixed side handrail attachment bracket. It is a right view which shows a fixed side handrail attachment bracket. It is a top view which shows a rotation side handrail attachment bracket. It is a front view which shows a rotation side handrail attachment bracket. It is a right view which shows a rotation side handrail attachment bracket. It is a front view which shows the conventional jib whole. It is a front view which shows the conventional handrail mounting bracket. It is a top view which shows the conventional handrail mounting bracket.

1 and 2 are a plan view and a front view of the jib. 3 and 4 are a front view and a right side view of the vicinity of the handrail mounting bracket. 5 and 6 are plan views of the handrail mounting bracket, FIG. 5 shows a state during work, and FIG. 6 shows a state when the handrail main body is stored. 5 is a view taken in the direction of arrow F5 shown in FIG. 7 to 9 are a plan view, a front view, and a right side view showing the fixed-side handrail mounting bracket. 10 to 12 are a plan view, a front view, and a right side view showing the rotation-side handrail mounting bracket.
Hereinafter, an embodiment of a rotary retractable handrail according to the present invention will be described with reference to FIGS. First, the jib 10 to which the rotary retractable handrail 1 according to the present invention is attached will be described.

  As shown in FIG. 1, the jib 10 is a lattice structure jib (also called a boom or an attachment). The jib 10 includes a jib vertical member 15 arranged in the vertical direction. The width of the jib 10 (the vertical width in FIG. 1) exceeds the transport limit width when the rotary retractable handrail 1 is attached to the work position (the state shown in FIGS. 1 and 2). The jib 10 can be disassembled and assembled. That is, the jib 110 shown in FIG. 13 can be disassembled into the jibs 110a to 110d, and one of the plurality of disassembled jibs corresponds to the jib 10 shown in FIG.

  The work of disassembling and assembling the jib 10 is performed by an operator on the upper surface of the jib 10. Various objects are arranged on the upper surface of the jib 10. Specifically, the scaffold 11 and the support rope 12 (also called a boom guy line or the like) are placed on the upper surface of the jib 10. Further, in order to prevent various cables from rubbing the upper surface of the jib 10, a cable roller 13 is attached to the upper surface of the jib 10. The revolving retractable handrail 1 is arranged on the outer side in the width direction of the jib 10 so as to avoid these objects arranged on the upper surface of the jib 10.

  As shown in FIG. 1 and FIG. 2, the rotary retractable handrail 1 projects to the upper side of the jib 10 in order to connect a rope 14 for safety belt (safety belt) during work (see FIGS. 2 and 13). ) A plurality are arranged. A safety belt (safety belt) rope 14 is connected between the plurality of rotary retractable handrails 1. In addition, as shown by a two-dot chain line in FIGS. 3 and 4, the rotary retractable handrail 1 is stored inside the jib 10 at times other than during work (hereinafter, this time is referred to as “stored”). Details of the operation of the rotary retractable handrail 1 will be described later. The rotary retractable handrail 1 includes a bar-shaped handrail main body 20 and a handrail attachment bracket 30 for attaching the handrail main body 20 to the jib vertical member 15.

  As shown in FIGS. 1 and 2, the handrail main body 20 is a rod-shaped member (pole) for connecting the safety belt rope 14. 2 to 4 (particularly FIG. 2), the handrail main body 20 includes a pin hole 20a formed near the lower end of the handrail main body 20 and a pin hole 20b formed near the upper end. The function of the pin hole will be described later).

  The handrail mounting bracket 30 is attached to the jib longitudinal member 15 in order to attach the handrail body 20 to the jib longitudinal member 15. The handrail mounting bracket 30 includes a fixed-side handrail mounting bracket 31 fixed to the jib longitudinal member 15 and a rotating-side handrail mounting bracket 35 that is rotatably mounted outside the fixed-side handrail mounting bracket 31.

  The fixed handrail mounting bracket 31 is fixed to the jib longitudinal member 15 as described above. And the movement of the vertical direction of the rotation side handrail attachment bracket 35 mentioned later is controlled. More specifically, as shown in FIGS. 7 to 9, the fixed-side handrail mounting bracket 31 is obtained by fastening two half-cracked pipes 31a and 31b with bolts 41 (see FIG. 4), and has a tubular shape as a whole. is there. Further, the fixed-side handrail mounting bracket 31 has a cylindrical portion (referred to as “fixed-side cylindrical portion 32”) fixed to the jib longitudinal member 15 (see FIG. 4) and a lower side of the fixed-side cylindrical portion 32. A fixed lower plate 33 to be attached and an upper plate 34 to be attached to the upper side are provided.

  The fixed-side lower plate 33 is a plate that regulates the movement of a later-described rotation-side handrail mounting bracket 35 (see FIG. 4). More specifically, the fixed-side lower plate 33 is attached to the fixed-side tubular portion 32 so as to be positioned below the lower end of the rotation-side handrail mounting bracket 35 (see FIG. 4). Thereby, the downward movement of the rotation-side handrail mounting bracket 35 (see FIG. 4) is restricted. Further, as shown in FIGS. 7 and 9, the fixed side lower plate 33 includes a fixed side lower plate 33A on the outer side of the jib 10 and a fixed side lower plate 33B on the same side. A pin hole 33a is formed in the fixed lower plate 33A, and a pin hole 33b is formed in the fixed lower plate 33B (the functions of the pin holes 33a and 33b will be described later).

  The upper plate 34 is a plate that regulates the movement of a rotation-side handrail mounting bracket 35 (see FIG. 4), which will be described later, in the same manner as the fixed-side lower plate 33. That is, it is attached to the fixed-side tubular portion 32 so as to be positioned above the upper end of the rotation-side handrail mounting bracket 35 (see FIG. 4). Thereby, the upward movement of the rotation-side handrail mounting bracket 35 (see FIG. 4) is restricted.

  As shown in FIGS. 3 and 4, the rotation-side handrail attachment bracket 35 is attached to the outside of the fixed-side handrail attachment bracket 31 and is rotatable around the axis of the jib vertical member 15. . More specifically, as shown in FIGS. 10 to 12, the rotation-side handrail mounting bracket 35 includes a jib vertical member-side mounting portion 36 attached to the outside of the fixed-side handrail mounting bracket 31 (see FIG. 4), and a handrail main body. 20 (see FIG. 4), a handrail main body side attaching portion 37, a jib longitudinal member side attaching portion 36 and a handrail main body side attaching portion 37, and a rotating side attached to the lower portion of the connecting portion 38. A lower plate 39.

  The jib vertical member side attachment portion 36 is a cylindrical portion attached to the outside of the fixed-side handrail attachment bracket 31 (see FIG. 4). As shown in FIG. 4, the jib longitudinal member side mounting portion 36 is disposed between the fixed side lower plate 33 and the upper plate 34 of the fixed side handrail mounting bracket 31. Thereby, the vertical movement of the rotation-side handrail mounting bracket 35 is restricted. Moreover, as shown in FIGS. 10-12, the jib vertical member side attaching part 36 is formed in a cylindrical shape by fastening two half-cracked pipe-like members 36a and 36b with bolts.

  The handrail main body side attaching portion 37 is a cylindrical portion to which the handrail main body 20 (see FIG. 4) is attached. More specifically, the handrail main body 20 (see FIG. 4) is disposed inside the handrail main body side attachment portion 37. Further, a pin hole 37a is formed in the handrail main body side attachment portion 37 (the function of the pin hole 37a will be described later).

  The connection part 38 is a part which connects the jib vertical member side attachment part 36 and the handrail main body side attachment part 37. A rotation-side lower plate 39 is attached to the lower portion of the connecting portion 38.

  The rotation-side lower plate 39 is a plate-like portion attached to the lower part of the jib vertical member-side attachment portion 36 and the connecting portion 38, and has a pin hole 39a (the function of the pin hole 39a will be described later).

(Operation of rotating retractable handrail)
Next, the operation at the time of storing and using the rotary retractable handrail 1 will be described.

  First, the state when the jib 10 is disassembled and assembled (when the handrail body 20 is used) will be described. As shown in FIGS. 1-4, the handrail main body 20 is arrange | positioned in the width direction outer side of the jib 10, and is protruded and arrange | positioned above the upper surface of the jib 10 (refer FIG. 2). At this time, as shown in FIGS. 3 to 5 (particularly FIG. 5), the bracket fixing pin 51 is inserted into the pin hole 33a of the fixed lower plate 33A and the pin hole 39a of the rotating lower plate 39. . Thereby, the rotation side handrail mounting bracket 35 is fixed. As shown in FIGS. 3 and 4, the handrail body fixing pin 52 is inserted into the pin hole 20 a of the handrail body 20 and the pin hole 37 a of the handrail body side attachment portion 37. Thereby, the handrail main body 20 is fixed.

Next, the operation when the handrail body 20 is stored will be described. First, the safety belt rope 14 (see FIG. 2) connected to the handrail body 20 is removed. Next, the handrail body fixing pin 52 shown in FIGS. 3 and 4 is removed, and the handrail body 20 is slid downward (lowered from the working position to the storage position). And the position of the handrail main body 20 is adjusted so that the pin hole 20b (refer FIG. 2) formed in the upper end vicinity of the handrail main body 20 and the pin hole 37a of the handrail main body side attaching part 37 may communicate. And the handrail main body fixing pin 52 is inserted in the pin hole 20b and the pin hole 37a, and the handrail main body 20 is fixed.
Next, the bracket fixing pin 51 shown in FIG. 5 is removed, and the rotation-side handrail mounting bracket 35 is rotated to the inside of the jib 10 (from the working position to the retracted position. That is, from the state of FIG. 5 to the state of FIG. ). Then, as shown in FIG. 6, the position of the rotation-side handrail mounting bracket 35 is adjusted so that the pin hole 39a of the rotation-side lower plate 39 and the pin hole 33b of the fixed-side lower plate 33B communicate with each other. And the bracket fixing pin 51 is inserted in the pin hole 33b and the pin hole 39a, and the rotation side handrail mounting bracket 35 is fixed. In this way, the handrail body 20 is fixed at the storage position.

  Next, an operation when using the handrail main body 20 will be described. This operation is the reverse of the operation when the handrail body 20 is stored. First, the bracket fixing pin 51 is removed, the rotating handrail mounting bracket 35 is rotated to the working position (from the state of FIG. 6 to the state of FIG. 5), and the rotating handrail mounting bracket 35 is fixed by the bracket fixing pin 51. Next, the handrail body fixing pin 52 shown in FIG. 4 is removed, the handrail body 20 is slid upward, and the handrail body 20 is fixed by the handrail body fixing pin 52. Then, the safety belt rope 14 (see FIGS. 1 and 2) is stretched between the handrail main bodies 20.

(Features of the rotating retractable handrail of this embodiment)
The rotary retractable handrail 1 of the present embodiment has the following features.

  In the rotary retractable handrail 1, the rotation-side handrail mounting bracket 35 to which the handrail main body 20 shown in FIG. 4 and the like is attached can rotate around the axis of the jib vertical member 15. Therefore, the handrail main body 20 can be stored from the outside to the inside of the jib 10 by a simple operation (see particularly FIGS. 5 and 6). Therefore, compared to the case where such storage is not possible, the work time required for assembling and disassembling the jib 10 can be reduced and labor can be saved.

  Moreover, in this rotation retractable handrail 1, as shown in FIG. 4 etc., the rotation side handrail attachment bracket 35 is attached to the outer side of the fixed side handrail attachment bracket 31 fixed to the jib vertical member 15. Therefore, the rotation-side handrail mounting bracket 35 is restricted from moving in the axial direction of the jib vertical member 15 by the fixed-side lower plate 33 and the fixed-side upper plate 34.

  As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

DESCRIPTION OF SYMBOLS 1 Rotation retractable handrail 10 Jib 14 Safety belt rope 15 Jib vertical member 20 Handrail main body 30 Handrail mounting bracket 31 Fixed side handrail mounting bracket 35 Rotation side handrail mounting bracket

Claims (1)

A handrail attached to a jib vertical member of a lattice structure jib to connect a rope for safety belt,
A handrail body,
A handrail mounting bracket for attaching the handrail body to the jib longitudinal member;
With
The handrail mounting bracket is
A fixed handrail mounting bracket fixed to the jib longitudinal member;
A rotation-side handrail mounting bracket that is attached to the outside of the fixed-side handrail mounting bracket and that is rotatable about the axis of the jib vertical member;
Revolving retractable handrail.

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