JP2005076391A - Work platform and method for installing work platform - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail installed to a pair of braces built between two supports for a work platform, which is not slipped off easily even when the work platform is installed comparatively simply, and a method for installing the handrail. <P>SOLUTION: In the work platform, which has a pair of the braces 2 and 2 crossed in an X shape and built between the two supports and the handrails 8 having first mounting sections 4 and second mounting sections 5 on both end sides of a handrail body and in which the handrail body is mounted between a pair of the braces through the first mounting sections and the second mounting sections, the first mounting sections are composed of hook sections 4a, bearing plates 4b continuously connected to the hook sections and fixed at the end sections of the handrail body and stop pieces 4c continuously connected at multiple-ends of the hook sections and extended in the direction interfering in the opening sections of the hook sections. In the work platform, the second mounting sections are composed of wedges 6 connected to the handrail body and slidably inserted to a press holding part 5a and wedge inserting sections. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a working scaffold in which a handrail is attached to a pair of braces constructed between two struts and a method for installing the same.

  Conventionally, as disclosed in Patent Document 1, in a working scaffold composed of a frame scaffold or the like constructed at a construction civil engineering work site, a pair of rods are used between struts along both longitudinal sides of the scaffold plate. Since the X-shaped cross brace is bridged, the cross brace serves as a safety fence, and the safety of the worker who crosses the scaffolding board can be achieved.

  However, as shown in FIG. 11 and FIG. 12, such a cross brace 42 is in a state where its lower part is opened in a substantially triangular shape with the scaffold plate. In the case of working in the middle, there was a risk of accidental fall from the triangular opening. In order to prevent such a danger, the handrail 43 is horizontally stretched over the bar forming the lower triangular opening of the cross brace 42.

  As this type of handrail, a taper guide portion 44 that guides the fitting of the latching member 46 into the cross brace 42 is provided in the opening 48 of the latching member main body 46 that is formed in a substantially downward C-shaped cross section. The taper guide portion 44 facilitates the fitting operation of the latch member 46.

  The handrail 43 for the cross brace 42 configured in this way is horizontally bridged over the cross brace 42 stretched between the columns of the work scaffold. This will be described below.

  In attaching the handrail 43 to the cross brace 42, an operator who wears the handrail 43 enters the work scaffold, brings the handrail 43 to the inside of the cross brace 42, and the bar-shaped handrail main body. The holding member 46 on one end side is pressed from the upper side against one of the braces 42 with the opening 48 facing downward while the hand 43 is held by the hand.

  The opening 48 is opened by elastic deformation of the latching member 46 due to the pressing force, and the latching member 46 is fitted into the handrail 43. After the fitting, the opening is opened by the elastic restoring force of the latching member 46. The part 48 is closed, so that the latching member 46 is latched in the state of being fitted into the breath 42.

  When the opening 48 of the latching member 46 is pressed against the brace 42, the opening 48 can be easily opened by the wedge effect of the taper guide portion 44 provided at the opening 48. The member 46 can be easily fitted.

After the hooking member 46 on one end side of the bar-shaped handrail main body 43 is hooked on one brace 42 in this way, the hooking member 46 on the other end side of the bar-shaped handrail main body 43 is connected to the other brace in the same manner as described above. When pressed against 42 from above, the opening 48 of the latching member 46 opens due to elastic deformation, and the latching member 46 is latched in a state of being fitted into the breath 42. As a result, both ends of the latching member 46 are latched by the braces 42, 42.
JP 2003-27739 A (from paragraph numbers to FIGS. 4 and 5)

  In such a conventional handrail for a working scaffold, the opening 48 of the latching member 46 is opened by elastic deformation, and the latching member 46 is latched in a state of being fitted into the brace 42. As a result, the latch members 46, 46 at both ends of the latch member 46 are configured to be latched by the brace 42.

  However, in such a structure and method of latching in a conventional handrail for a working scaffold, the opening 48 of the latching member 46 is opened by elastic deformation and latched on the brace 42. Therefore, when the impact force applied to the handrail is large, there is a problem that the handrail may accidentally fall off, resulting in a serious accident.

  That is, since the opening 48 of the latching member 46 is opened by elastic deformation and latched by both the braces 42, 42, when the work scaffold is installed at a high place, the operator can use his own force. The opening 48 is elastically deformed, or the opening 48 is elastically deformed and combined using a tool such as a hammer.

  Because it is elastically deformed with a relatively weak force like this, handrails are used when an operator walks along a handrail while carrying materials at a high place, or when he or she is about to fall by sliding his / her foot. A large impact force may act on. In such a case, when the impact force applied to the handrail is large, the handrail may fall out carelessly, leading to a serious accident, which is extremely dangerous.

  Further, since the opening 48 of the latching member 46 is opened by elastic deformation and is latched by the two breaths 42, 42, the opening 48 gradually becomes permanently deformed beyond the elastic limit when repeatedly used. Finally, there is a risk that the brace 42 will not be hooked.

  The present invention was devised in view of such a problem, and a handrail attached to a pair of braces erected between two struts is permanently deformed even if the attachment is relatively simple. It is an object of the present invention to provide a work scaffold and a work scaffold installation method that can be easily prevented from falling off.

  In order to solve the above-mentioned problem, one means of the present invention includes a pair of braces constructed by crossing in an X shape between two struts, a first attachment portion and a second attachment on both sides of the handrail body. A work scaffold having a handrail provided with an attachment portion, wherein the handrail main body is attached between the pair of braces via the first attachment portion and the second attachment portion. One mounting portion is connected to the hook portion, the support plate that is connected to the hook portion and fixed to the end portion of the handrail main body, and the hook portion that is connected to multiple ends of the hook portion and interferes with the opening of the hook portion. And a stop piece extending in the direction, and the second attachment portion is constituted by a wedge that is coupled to the handrail body and is slidably inserted into a breath holding portion and a wedge insertion portion.

  In this case, the hook portion is formed in a U-shape, the base end of which is connected to the support plate, and the stop pieces connected to multiple ends are inclined and extend in the direction of the support plate, thereby opening the opening. The width is regulated.

  Similarly, another means of the present invention includes a pair of braces constructed by crossing in an X shape between two struts, and a handrail having attachment portions on both sides of the handrail main body. In a working scaffold in which a sliding main body is attached between the pair of breaths via the attachment portions, the attachment portion is pivotally coupled to the handrail main body, and includes a breath gripping portion and a wedge insertion portion. And a wedge that is slidably inserted into the wedge insertion portion while being attached to the guide via a pin.

  Further, in each of the above-mentioned means, the guide includes a bay-shaped breath holding portion and a U-shaped wedge insertion portion on both sides, and the wedge insertion portion is pivotable via a pin and is an end portion of the handrail body. It is preferable that a long hole extending in the axial direction is formed in the wedge, and the pin is inserted into the long hole.

  Furthermore, the handrail main body may be composed of a single pipe or an outer pipe and a telescopic pipe composed of an inner pipe inserted into the outer pipe.

  Furthermore, the method of the present invention is a method of installing a working scaffold in which a handrail is attached to a pair of braces constructed by crossing in an X shape between two struts, and attachments formed on both sides of the handrail body. At one position where one of the attachment portions is separated from the brace, the other attachment portion is fitted into the breath, and then the one attachment portion is moved closer to the brace and fixed.

  In the present invention, the first attachment portion is connected to the hook portion, the support plate connected to the hook portion and fixed to the end portion of the handrail body, and connected to multiple ends of the hook portion. It consists of a stop piece that extends in the direction of interference with the opening of the hook part, and the second mounting part is composed of a bristle gripping part and a wedge that is slidably inserted into the wedge insertion part Therefore, it is possible to configure a working scaffold that is simple in shape but easy to attach and difficult to come off.

  In addition, the hook portion is formed in a U-shape, the base end thereof is connected to the support plate, and the stop piece connected to multiple ends extends in an inclined direction toward the support plate, thereby opening the opening width of the opening portion. Therefore, it is easy to fix the handrail to the brace and it is possible to constitute a working scaffold that is difficult to come off.

  Furthermore, the mounting portion is pivotally coupled to the handrail main body and includes a breath gripping portion and a wedge insertion portion, and is slidable on the wedge insertion portion while being attached to the guide via a pin. Since it is comprised with the inserted wedge, a handrail can be attached to a brace reliably and easily, without using a special tool.

  Further, the guide includes a bay-shaped breath holding portion and a U-shaped wedge insertion portion on both sides, and the wedge insertion portion is coupled to the end portion of the handrail body through a pin so as to be rotatable. A work hole is constructed by inserting a long hole along the axial direction and inserting the pin into the long hole, so that it can be easily and reliably mounted while being simple. Thus, the handrail does not fall off to the extent that the impact force is applied, and work safety can be achieved.

  Furthermore, since the handrail is configured to be extendable and retractable, it is possible to provide a handrail for a working scaffold that can be freely handled even if the strut spacing in the working scaffold changes variously.

  Furthermore, according to the method of the present invention, there is provided a safe working scaffold that does not easily fall off even if attachment of both ends of a handrail is relatively simple and that does not permanently deform, and a method for installing the same. be able to.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. A working scaffold used for construction, civil engineering, etc. of the present invention has two struts 1 and 1 as in the prior art. A pair of braces 2 and 2 that are crossed in an X shape between them, and a handrail 8 having a first attachment portion 4 and a second attachment portion 5 on both ends of the handrail body, The handrail body is attached between the pair of braces 2 and 2 via the first attachment portion 4 and the second attachment portion 5.

  In the present invention, the first mounting portion 4 is connected to the hook portion 4a, the support plate 4b connected to the hook portion 4a and fixed to the end portion of the handrail body, and the multiple ends of the hook portion 4a. It comprises a stop piece 4c that is provided in a row and extends in a direction that interferes with the opening of the hook portion 4a, and the second attachment portion is coupled to the handrail body and slides on the breath gripping portion 5a and the wedge insertion portion. It is characterized by comprising a wedge 6 inserted freely.

  In more detail, in FIG. 1, in a work scaffolding installed at a construction site or the like, a large number of pairs of pillars 1 are erected on the front and rear, and a scaffolding plate 7 is installed between these pillars 1. Furthermore, in order to reinforce the support column 1 and to prevent it from overturning, a breath 2 inclined between the left and right support columns 1 and 1 is installed. In general, the brace 2 is often installed at the same height with the two braces 2 and 2 crossing each other.

  Furthermore, the worker who walks on the scaffolding is installed so that the bracelet 2 can be used as a handrail. However, since the crossed triangular space is too wide, the worker slips or falls while walking. The handrail 3 is installed between the two braces 2 and 2 in this portion because there is a risk of falling to the ground from this gap.

  As shown in FIG. 2, the handrail 3 has a first attachment portion 4 formed at the right end portion and a second attachment portion 5 formed at the left end portion. Further, a wedge 6 is used for the second attachment portion 5 for coupling with the brace 2. The overall shape of the handrail 3 is shown in FIG. 2, the detailed shape of the first mounting portion 4 is shown in FIG. 3, and the detailed shape of the second mounting portion 5 is shown in FIG. 4, FIG. 5, and FIG. Yes.

  3 (A) is a view of the first mounting portion 4 in FIG. 1 as viewed from above, and FIG. 3 (B) is a view of the first attachment portion 4 in the direction of the arrow in FIG. 3 (A). ) Is viewed in the direction of the arrow in FIG.

  In each figure, the first attachment portion 4 is formed with a hook portion 4a formed in an arch shape at an interval between which the brace 2 is sandwiched, and a support plate 4b at one end thereof is fixed to the handrail 3 and the other. The end stop piece 4c is formed in a direction away from the surface of the hook portion 4a and bent in a direction approaching the fixed support plate 4b.

  FIG. 4A shows a detailed enlarged shape of the second attachment portion 5 in FIG. 1, and FIG. 4B is a view seen in the direction of the arrow in FIG. In each figure, the second attachment portion 5 has a grip portion 5a for holding the brace 2 and a wedge insertion portion 5b for holding the wedge 6, and the elongated hole 6a of the wedge 6 can be moved by the coupling pin 5c. And is attached to the handrail 3.

  As shown in FIG. 4B, the second attachment portion 5 moves the brace 2 from the illustrated position 2 to the position 2F to be clamped and fixed to the gripping portion 5a, and then inserts the wedge 6 into the position shown in FIG. ), The brace 2 is sandwiched and fixed by the grip portion 5a.

  FIG. 5 is a detailed view of the wedge 6, FIG. 6 (A) shows the side surface, and FIG. 6 (B) shows the state seen from the arrow direction of FIG. 6 (A). Along the hole 6a is formed along. Therefore, when the wedge 6 is pushed leftward with the breath 2 sandwiched between the second attachment portions 5 in the state of FIG. 4A, the second attachment portion 5 is firmly fixed to the breath 2. It will be.

FIG. 6 is a detailed view in which the grip portion 5a of the second attachment portion 5 is taken out and partially enlarged.

  Next, a method of attaching the handrail 3 to the brace 2 will be described. In FIG. 3A, the first attachment is performed at the position of the two-dot chain line indicating the state where the second attachment portion 5 is separated from the breath 2. The stop piece 4c of the portion 4 avoids the brace 2, and the hook portion 4a is lowered to match the position where the brace 2 is pinched so that the brace 2 is pinched by the first mounting portion 4.

  Subsequently, the second attachment portion 5 is swung toward the breath 2 side to approach the second attachment portion 5 from the position 2 shown in FIG. Then, the wedge 6 is inserted, and the brace 2 is clamped and fixed by the grip portion 5a in the state shown in FIG. 4A.

  In this way, the first mounting portion 4 is clamped in accordance with the brace 2, and then the second mounting portion 5 is moved closer to the brace 2 side while being moved closer to the brace 2, and the second mounting portion 5 is moved with respect to the brace 2. Since the brace 2 is clamped by the gripping part 5a and the wedge 6 is slid and fixed, it is coupled by a simple fitting operation, unlike the conventional method of forcibly fitting with a force more than necessary. can do.

  3A, after the handrail 3 is attached to the brace 2, the stop piece 4c formed at the other end of the first attachment portion 4 has entered the lower side of the brace 2. Therefore, the handrail 3 is securely attached without the first attachment portion 4 coming out of the brace 2 unless the second attachment portion 5 is turned and removed.

  In addition, it is possible to provide a working scaffold to which a safe handrail is attached so that the joint portion is permanently deformed by repeated use and does not come off carelessly.

  Therefore, even when an impact force is applied to the handrail 3, the hook portion 4a and the second attachment portion 5 which is a fixed portion are not easily detached by the shock, and a safe and reliable handrail 3 can be obtained. Further, since the handrail 3 can be attached by such a method, a method for attaching the handrail 3 by a simple operation can be provided.

  In particular, when working at high places, installation work can be done without using a special tool, so workability is improved and the tool is swung, carelessly dropped and the work is interrupted. No such danger.

  FIG. 7 shows an attached state of the handrail 3 that can be applied with a slight change even when the installation interval of the columns 1 is approaching or far away. 1 except that the middle part of the handrail 3 is configured to be extendable and the right side mounting part 5 and the left side mounting part 5 have the same configuration. FIG. 8 shows the overall shape, and FIG. 9 shows an enlarged shape of the intermediate portion.

  As shown in FIG. 9, in the handrail 3, the left pipe 3b is inserted into the right pipe 3a, the tip 3c of the right pipe 3a is formed thin, and the tip 3d of the left pipe 3b swells, It is configured so that both sides do not fall out. Since it is such a structure, even if the installation interval of the support | pillar 1 approaches or is far away, a handrail can be freely attached now.

  In FIG. 10, since the second attachment portion 5 is formed at both ends and is configured to be rotatable around the coupling pin 5c to which the wedge 6 is attached, it can sufficiently cope with the case where the inclination of the breath 2 is changed. It shows what you can do. At the same time, since the second attachment portions 5 are formed at both ends as in the case shown in FIG. 8, the handling is simple and the work is easy.

  In any of the above embodiments, the wedge 6 is driven from the upper side to the lower side along the breath 2, so that the wedge does not fall off due to its own weight or vibration. As a precaution, a lock pin can be driven in, a click can be provided, or a known technique can be applied so that the wedge 6 does not fall out carelessly.

  In addition, it is also possible to comprise the right attachment part 5 with the 1st attachment part 4 as shown in FIG. 2 with the form shown in FIG. 8, and the effect does not change at all.

  4B, the second mounting portion 5 is moved from the left side to the position 2F where the gripping portion 5a is fixed to the brace 2, and the brace 2 is clamped and fixed by the gripping portion 5a. However, the grip portion 5a and the wedge insertion portion 5b are formed in opposite directions, moved from the opposite right side to the position 2F where the grip portion 5a is fixed, and the brace 2 is sandwiched and fixed by the grip portion 5a. It can also be configured.

  Further, in FIG. 3, a stop piece 4c formed at the other end of the first mounting portion 4 is in a direction away from the surface of the U-shaped hook portion 4a, and the turning arrow A on the fixed support plate 4b side. Although it is formed by bending to the right side so as to approach the direction, it can also be configured by bending to the left side and forming it as shown by a broken line in FIGS. 3 (A) and 3 (B).

  Furthermore, it can be attached in any direction and position as long as the two braces intersect. That is, in any of the embodiments of FIGS. 1 and 7, the handrail 3 is attached to the downward triangle portion of the brace 2 and 2, but the same effect can be obtained even if attached to the upward triangle portion. It is clear that this will occur. Furthermore, it can be attached vertically to the left and right triangular portions, which is effective in improving work safety and efficiency.

  In addition, this invention is not limited to the said embodiment, It can implement by changing suitably within the range of the technical idea of this invention.

1 is a side view showing a first embodiment of the present invention. It is a side view which shows the breath in 1st embodiment of this invention single-piece | unit. It is the elements on larger scale which show the 1st attachment part in 1st embodiment of this invention. It is the elements on larger scale which show the 2nd attachment part in 1st embodiment of this invention. It is the elements on larger scale which show the wedge of the 2nd attachment part in 1st embodiment of this invention. It is the elements on larger scale which show the 2nd attachment part in 1st embodiment of this invention alone. It is a side view which shows 2nd embodiment of this invention. It is a side view which shows the handrail in 2nd embodiment of this invention alone. It is sectional drawing which shows the enlarged shape of the intermediate part of the handrail in 2nd embodiment of this invention. It is a side view which shows the state of the movable part in 2nd embodiment of this invention. It is an enlarged view of the handrail attachment part of a prior art example. It is an expanded sectional view of the handrail attachment part of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 support | pillar 2 breath 3 handrail 4 1st attachment part 4a hook part 4b support plate 4c stop piece 5 2nd attachment part (guide)
5a Gripping part 5b Wedge insertion part 5c Pin 6 Wedge 6a Long hole 7 Scaffold plate

Claims (6)

A pair of braces constructed in an X-shaped cross between two support posts, and a handrail having a first attachment portion and a second attachment portion on both ends of the handrail body, In a working scaffold in which a sliding body is attached between the pair of braces via the first attachment portion and the second attachment portion, the first attachment portion is connected to the hook portion and the hook portion. A support plate that is installed and fixed to an end of the handrail main body, and a stop piece that is connected to multiple ends of the hook portion and extends in a direction that interferes with the opening of the hook portion, A working scaffold characterized in that an attachment portion is composed of a breath gripping portion and a wedge slidably inserted into a wedge insertion portion, coupled to the handrail main body. The hook part is formed in a U-shape, and the base end of the hook part is connected to the support plate, and the stop piece connected to the multiple ends extends in the direction of the support plate to regulate the opening width of the opening. Item 2. The work scaffold according to Item 1. It has a pair of braces constructed in an X-shaped cross between two struts, and a handrail provided with attachment portions at both ends of the handrail main body, and the handrail main body passes through each attachment portion. In the working scaffold attached between the pair of breaths, a guide having the attachment portion pivotably coupled to the handrail body and having a breath gripping portion and a wedge insertion portion, and a pin attached to the guide A working scaffold comprising: a wedge that is slidably inserted into the wedge insertion portion while being attached to the wedge insertion portion. The guide includes a bay-shaped breath holding portion and a U-shaped wedge insertion portion on both sides, and the wedge insertion portion is coupled to the end portion of the handrail body through a pin so as to be pivotable. The work scaffold according to claim 1, 2 or 3, wherein a long hole is formed along the axial direction, and the pin is inserted into the long hole. The working scaffold according to claim 1, 2, 3, or 4, wherein the handrail body is constituted by a telescopic pipe comprising a single pipe or an outer pipe and an inner pipe inserted into the outer pipe. . In the installation method of the working scaffold in which a handrail is attached to a pair of braces constructed by crossing in an X shape between two struts, one of the attachment portions formed on both ends of the handrail body An installation method for a working scaffold in which the other attachment portion is fitted into the brace at a position separated from the breath, and then the one attachment portion is rotated to approach the brace and fixed.

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