JP4433308B2 - Handrail for temporary scaffolding - Google Patents

Description

  The present invention relates to a handrail for a temporary scaffold, and can be used for a temporary scaffold assembled at a construction site or a civil engineering site.

Temporary scaffolds assembled at construction sites and civil engineering sites are required to have handrails to ensure the safety of workers. The handrail shown in the following Patent Document 1 has a handrail main body coupled with a bracket at an intersection of two braces arranged in an X-shape. At both ends in the length direction, there are provided connecting portions connected to the temporary scaffold constituent members constituting the temporary scaffold, and these connecting portions are formed by substantially L-shaped brackets.
JP 2002-242420 A (FIG. 1, FIG. 2, paragraph number 0015)

  The temporary scaffold is assembled in an arbitrary shape using any temporary scaffold constituent member according to the construction site, and the handrail for the temporary scaffold is assembled and disposed on such a temporary scaffold. Therefore, it is preferable that the handrail can be applied only to a specific temporary scaffold component member among various temporary scaffold component members used for assembling the temporary scaffold, and cannot be applied to other temporary scaffold component members. However, it is required to be freely applicable to various temporary scaffold components. For that purpose, it is necessary to adapt the connection part provided in the edge part of a handrail main body to the characteristic of the shape of the structural member for temporary scaffolds to which this connection part is connected.

  The present invention was invented by paying attention to the fact that various temporary scaffold components used for assembling a temporary scaffold are formed of a circular material such as a round pipe or a round bar.

  An object of the present invention is to provide a handrail for a temporary scaffold that can be freely applied to various temporary scaffold components used for assembling the temporary scaffold.

  The temporary scaffolding handrail according to the present invention is a temporary scaffolding handrail in which connecting portions connected to the temporary scaffolding structural members constituting the temporary scaffolding are provided at both ends in the length direction of the handrail main body. The connecting portion is provided with an insertion portion that is opened in a circular or substantially circular shape, and the temporary scaffolding component member is connected to the insertion portion by inserting the temporary scaffolding component member into the insertion portion. is there.

  Various temporary scaffolding components used for the assembly of the temporary scaffolding are formed by circular members such as round pipes and round bars, and the connection part of the handrail for temporary scaffolding according to the present invention includes: The handrail according to the present invention is connected to the temporary scaffolding component member by inserting the temporary scaffolding component member into the insertion portion provided in a circular or substantially circular shape. Can be freely applied to various temporary scaffolding components used for assembling the temporary scaffolding, and has versatility with improved flexibility of application.

  In addition, the above-described circular or substantially circular insertion portion means that the insertion portion may be an insertion portion that is partially cut off or an elliptical insertion portion, and is not necessarily a perfect circle. It does not need to be an insertion part opened in the front.

  Moreover, if the said connection part is provided with the insertion part opened circularly or substantially circular shape, it can be comprised by arbitrary shapes and structures. For example, the connecting portion is coupled to the end portion of the handrail body, and the base member in which the first notch portion is formed and the base member can be opened and closed so as to open and close the first notch portion. And a floating member formed with a second notch, the first notch and the second notch when the loose member is moved relative to the base member so as to close the first notch. The insertion part is formed by the part.

  According to this, when the floating member opens the first cutout portion of the base member, the temporary scaffolding structural member can be inserted into the first cutout portion, and the floating member is allowed to idle to move the first cutout portion. By closing, the insertion part which confine | sealed the structural member for temporary scaffolding can be formed by the 1st notch part and the 2nd notch part of a floating member.

  In the case where the connecting portion has such a structure, the floating member may move freely and close the first notch portion may be performed by the weight of the floating member or manually by the operator. .

  Further, in the case where the connecting portion has such a structure, when the insertion portion is formed by the first notch portion and the second notch portion on the temporary scaffolding handrail, the looseness of the floating member relative to the base member is determined. It is desirable to provide stop means for stopping the operation. According to this, the floating of the floating member with respect to the base member is blocked by the stop means, and the temporary scaffolding structural member is prevented from falling off from the insertion portion.

  Further, the connecting portion may be provided in the handrail main body so as not to be detachable, but the connecting portion is detachably attached to the handrail main body, and the connecting portion is connected to the insertion portion having a different opening size. More preferably, the part can be replaced. According to this, handrails can be applied to various temporary scaffold components having different cross-sectional diameters by exchanging the connecting portions, and the versatility of handrails is further improved.

  Further, the length of the handrail body may be a constant length, but it is more preferable that the length of the handrail body can be expanded and contracted. According to this, the handrail can be applied also to various temporary scaffolds having different intervals between the two temporary scaffold components over which the handrail is bridged, and the versatility of the handrail is further improved.

  In addition, the structure which can expand / contract the length of the handrail main body is arbitrary, for example, a plurality of pipe members having different cross-sectional diameters may be connected in a slidable nested manner, and a plurality of link members may be connected to each other. The length of the handrail main body made of these link members may be made expandable / contractable by connecting to a rhombus or the like.

  Further, the handrail body may be formed by a single bar made of a pipe material or the like, or may be formed by a combination of a plurality of bar materials, and further, a different material such as a face material and a bar material. You may form by the combination of these. Furthermore, the number of connecting portions provided at both ends in the length direction of the handrail main body may be a plurality of upper and lower portions at the end on the same side.

  Further, the handrail according to the present invention may be one in which only the handrail is attached to the temporary scaffold, or may be attached to the temporary scaffold in combination with other members such as braces, and further, braces, etc. It may be combined with other members in advance to form one unit and attached to a temporary scaffold as part of this unit.

  Furthermore, the handrail according to the present invention can be used for a temporary scaffold for a construction site, and can also be used for a temporary scaffold for a civil engineering site, and the construction object of the temporary scaffold is arbitrary.

  ADVANTAGE OF THE INVENTION According to this invention, the effect that a handrail can be freely applied with respect to the various structural members for temporary scaffolds used for assembly of a temporary scaffold is acquired.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows a temporary scaffold 1 for a construction site to which a handrail 30 according to the present embodiment is applied. The temporary scaffold 1 is supported by a base spindle 2 and arranged opposite to each other. The building frames 3 are connected to each other by the cloth plate 4, and the end portions of the braces 6 are inserted and engaged with the gravity lock pins 5 protruding from the building frame 3, so that the building frames 3 arranged to face each other can be connected. It is also formed by connecting with two braces 6 arranged in an X-shaped cross.

Since the handrail 30 of this embodiment is used to form a two-step handrail on the temporary scaffold 1, the upper and lower handrails 30 are formed on the stiffeners 7 of the two building frames 3 facing each other. By connecting both ends in the length direction, a two-stage handrail is provided on the temporary scaffold 1. More specifically, each stiffener 7 is formed of a vertical stiffener 7A and a horizontal stiffener 7B having a substantially horizontal lower portion . The handrail 30 is spanned between the lower portions of the stiffener 7A, and the upper handrail 30 is spanned between the stiffeners 7B. As a result, a handrail structure that is safe and effective is created in the temporary scaffold 1 by the two upper and lower handrails 30 and the two braces 6 arranged in an X-shaped cross.

  FIG. 2 is a front view showing the entire handrail 30. The handrail 30 includes a handrail main body 31 having a length in the left-right direction and a connecting portion 32 provided at both ends of the handrail main body 31 and connected to the stiffener 7 of the building frame 3. The handrail main body 31 is formed of a single pipe member 33 whose both ends are crushed and formed into a vertical flat portion 33A, and the connecting portion 32 is formed on the flat portion 33A as shown in FIG. A base member 35 coupled by bolts and nuts 34, and a loosely attached to the base member 35 by a first pin 36 with a head portion 36A and a second pin 37 with a head portion 37A so as to be freely movable in a vertical plane. Member 38.

  The base member 35 and the floating member 38 that are in a vertical posture with respect to the handrail main body 31 are formed of a thick plate material, and the upper end of the base member 35 is a bent portion 35A that is bent horizontally. The base member 35 is connected to the flat portion 33A with the bolt and nut 34 in a state where the bent portion 35A is locked to the upper side portion of the flat portion 33A, so that the base member 35 is centered on the bolt and nut 34. The rotation is stopped and attached to the handrail body 31.

  As shown in FIG. 2, the connecting portion 32 composed of the base member 35 and the floating member 38 differs in the front and back sides of the handrail main body 31 at both ends in the length direction of the handrail main body 31. Since the base member 35 and the floating member 38 are disposed, the base member 35 and the floating member 38 are members common to both the connecting portions 32.

  FIG. 4 is a front view of the base member 35, and FIG. 5 is a front view of the idler member 38. As shown in FIG. 4, the base member 35 is formed with bolt holes 39 through which the bolts of the bolts and nuts 34 are inserted, and the shaft portions 36B and 37B of the first and second pins 36 and 37 (FIG. 6). Also, pin holes 40 and 41 for inserting and fixing are also formed vertically. Further, the base member 35 is formed with a first cutout portion 42 that opens downward. The first cutout portion 42 has an upper semicircular portion 42A and a width that is the same as the diameter of the semicircular portion 42A. A vertical communication portion 42B having a size and extending from the lower side 35B of the base member 35 to the semicircular portion 42A and communicating the semicircular portion 42A to the outside of the base member 35.

  As shown in FIG. 5, a long hole 43 is formed in the floating member 38, and the long hole 43 is formed in the shaft portion 36 </ b> B of the first and second pins 36 and 37 as shown in FIGS. 6 and 7. , 37B are inserted into the guide slots 36A and 37A to prevent the pins 36 and 37 from coming off and locked. As shown in FIG. When 32 is connected to the stiffener 7 described above of the building frame 3 which is a constituent member of the temporary scaffold 1 of FIG. 1, the guide elongated hole 43 is formed in the shape shown in FIG. As shown in FIG. 1, a first long hole portion 43A extending in the vertical direction, and a second long hole portion 43B extending obliquely downward from the lower end of the first long hole portion 43A and extending outward in the length direction of the handrail 30 It consists of. The guide long hole 43 has a protruding portion 44 that protrudes from the outside in the length direction of the handrail 30 to the inside of the guide long hole 43 at the connecting portion between the first long hole portion 43A and the second long hole portion 43B. While being formed, the first elongated hole portion 43 </ b> A is formed with a recessed portion 45 that is recessed from the guide elongated hole 43 inward in the longitudinal direction of the handrail 30.

  Further, at the lower part of the floating member 38, when the connecting part 32 is connected to the stiffener 7 of the building frame 3 as shown in FIG. An extension portion 46 is formed for closing the communication portion 42B of the first cutout portion 42 of the base member 35 from the inner side in the length direction of the handrail 30 by more than half, and the upper side of the extension portion 46 is connected to the floating member 38. The second notch 47 is formed. The second notch 47 is a curved concave part formed with the same radius of curvature as the semicircular part 42A of the first notch 42 of the base member 35. A protrusion 48 protruding outward in the length direction of the handrail 30 is provided.

  Further, the floating member 38 is provided with a finger hooking portion 49 that extends inward in the length direction of the handrail 30 and obliquely downward on the opposite side of the extension portion 46 in the length direction of the handrail 30. ing.

  In the above, the guide elongated hole 43 of the floating member 38 is slidable with respect to the shaft portions 36B and 37B of the first and second pins 36 and 37 fixed to the base member 35. When the turning force in the vertical direction is applied to the floating member 38 by the finger hung on the floating member 38, the floating member 38 is moved relative to the base member 35 by the guide action of the guide long hole 43 and the first and second pins 36 and 37. It floats in the vertical plane.

  FIG. 6 shows the shape of the connecting portion 32 before connecting the connecting portion 32 to the stiffener 7 of the building frame 3. At this time, the shaft portion 36B of the first pin 36 is inserted into and engaged with the recess 45 of the guide long hole 43, and the shaft portion 37B of the second pin 37 is connected to the second long hole portion 43B of the guide long hole 43. Insertion engagement is made near the end. Thereby, the loose member 38 is prevented from rotating in the vertical plane around the first pin 36 or the second pin 37, and maintains a fixed posture with respect to the base member 35. At this time, the extending portion 46 of the floating member 38 is located at a position disengaged from the communication portion 42B of the first notch 42 of the base member 35. Therefore, the idling member 38 opens the first notch 42. At this time, the protrusion 48 of the floating member 38 protrudes into the first cutout 42.

When carrying out the work of hanging the handrail 30 between the building frames 3 facing each other of the temporary scaffold 1 shown in FIG. 1, as shown in FIG. The first notch portion 35 of 35 is allowed to move to a position where it cannot be closed by the finger hanging portion 49, and then the connecting portion 32 of the handrail 30 is dropped toward the stiffener 7 of the building frame 3 from above. As a result, an upward load is applied from the stiffener 7 to the protrusion 48 of the floating member 38 that protrudes into the first cutout 42 of the base member 35, so that the floating member 38 protrudes while slightly floating. Since the part 48 performs a floating movement that rotates inward in the longitudinal direction of the handrail 30 and the floating member 38 falls due to its own weight following this movement, the first member 48 has a first shape as shown in FIG. The shaft portion 36 of the pin 36 is inserted and engaged with the upper end portion of the first long hole 43 </ b> A of the guide long hole 43, and the shaft portion 37 </ b> B of the second pin 37 is a lower portion of the recess 45 in the guide long hole 43. Thus, the protruding portion 44 is inserted into and engaged with the protruding portion.

  The movement of the floating member 38 so as to move and fall in this way is that the first cutout portion 42 of the base member 35 is closed by the floating member 38, that is, the communication portion 42 </ b> B of the first cutout portion 42. As shown in FIG. 7, more than half of the left-right width dimension is closed by the extending portion 46 of the floating member 38. When more than half of the left-right width dimension of the communication portion 42B of the first cutout portion 42 is closed by the extending portion 46 of the floating member 38 in this way, the first cutout portion 42 of the base member 35 is connected to the connecting portion 32. And the second cutout portion 47 of the floating member 38 form an insertion portion 50 into which the stiffener 7 is inserted. The insertion portion 50 is formed of the stiffener 7 having a circular cross section. It is a substantially circular shape that corresponds to the cross-sectional shape, and is a partial circle that is partially cut off in the circumferential direction.

  Thereby, the connection part 32 provided in the edge part of the handrail main body 31 will be connected with the stiffener 7 in the latching state, and the connection part 32 of the both ends of the handrail main body 31 will be shown in FIG. By connecting to the stiffeners 7 between the building frames 3 arranged opposite to each other, the handrail 30 is stretched between these building frames 3.

  In addition, when the insertion member 50 is formed in the connecting portion 32 by the floating member 38 moving to the position shown in FIG. 7, the first pin 36 and the first pin 36 may move freely with respect to the base member 35. These pins 36 and 37 constitute stop means 51 for stopping the loose movement of the floating member 38 with respect to the base member 35.

  When removing the handrail 30 from the temporary scaffold 1 shown in FIG. 1, the protrusion 48 rotates outward in the length direction of the handrail 30 while lifting the entire floating member 38 by placing a finger on the finger rest portion 49. The floating member 38 is caused to move, so that the floating member 38 is returned to the position of FIG. 6, whereby the first notch 42 of the base member 35 is opened and the insertion portion 50 is greatly opened. The connecting portion 32 can be extracted from the stiffener 7.

  According to the present embodiment described above, the connecting portions 32 provided at both ends of the handrail main body 31 have the insertion portions 50 that are opened in a substantially circular shape, and the temporary scaffold constituent members constituting the temporary scaffold are as follows. Since the handrail 30 according to the present embodiment is not only the stiffener 7 of the building frame 3 but also the temporary scaffolding assembly because it is made of a material having a circular cross section such as a round pipe or a round bar. Therefore, the present invention can be freely applied to various temporary scaffold components used for the purpose, and has versatility that can be used in various temporary scaffolds.

  In addition, the connecting portion 32 can move freely with respect to the base member 35 so as to open and close the first notch portion 42, and the second notch portion 47 is formed. And the floating member 38, and when the floating member 38 is moved relative to the base member 35 so as to close the first cut portion 42, the first cut portion 42 and the second cut portion 47 are used for temporary scaffolding. Since the insertion portion 50 for inserting the component member is formed, the temporary scaffold component member can be inserted into the first notch portion 42 that is largely opened before the floating member 38 moves freely. Thereafter, the first cutout portion 42 is closed by the floating member 38, so that the temporary scaffolding structural member can be reliably prevented from falling off from the insertion portion 50 including the first cutout portion 42 and the second cutout portion 47.

  Further, the loose movement of the floating member 38 with respect to the base member 35 so as to close the first notch 42 causes the temporary scaffolding component member to abut on the protrusion 48 of the floating member 38 in the state of FIG. Since it is naturally performed by the dead weight of the floating member 38 that starts to move, the operation of connecting the connecting portion 32 to the temporary scaffold component can be easily performed.

  Further, after the connecting portion 32 is connected to the temporary scaffold component, stop means 51 for stopping the floating member 38 from moving relative to the base member 35 is formed by the first and second pins 36 and 37. Therefore, the first cutout portion 42 is not largely opened by the loose movement of the floating member 38, and thus the escape of the temporary scaffolding structural member from the insertion portion 50 can be reliably prevented.

  FIG. 8 shows an embodiment of the connecting portion 132 applicable to the temporary scaffold component 17 having a large cross-sectional diameter, and FIG. 9 shows an embodiment of the connecting portion 232 applicable to the temporary scaffold component 27 having a small cross-sectional diameter. The form is shown. 8 also includes a base member 135 and a floating member 138 that can move freely with respect to the base member 135, and the base member 132 and the floating member 138 are formed on the base member 132. The size of the first missing portion 142 and the second missing portion 147 is such that the insertion portion 150 corresponding to the temporary scaffolding structural member 17 having a large cross-sectional diameter can be formed. 9 is also composed of a base member 235 and a floating member 238 that can move freely with respect to the base member 235, and is formed on the base member 235 and the floating member 238. The first cutout portion 242 and the second cutout portion 247 have a size capable of forming the insertion portion 250 corresponding to the temporary scaffolding structural member 27 having a small cross-sectional diameter.

  The base members 135 and 235 in these embodiments are coupled to the handrail main body 31 with bolts and nuts 34 in the same manner as the base member 35 in the above-described embodiments. For this reason, each base member 35,135,235 can be attached or detached with respect to the handrail main body 31, in other words, the connection part 32,132,232 which uses the base member 35,135,235 as a structural member is provided. The handrail body 31 is detachably attached. For this reason, the connection parts 32, 132, 232 having the insertion parts 50, 150, 250 having different opening sizes can be exchanged for the same handrail main body 31.

  Thereby, the free applicability of the handrail 30 with respect to various temporary scaffold components is further improved.

  In addition, the connection part attached to the both ends of the handrail main body 31 may be a connection part for the structural member for temporary scaffolds in which the diameter of a cross section is the same, for the structural member for temporary scaffolds from which the diameter of a cross section differs. It may be a connecting part.

  FIG. 10 shows a temporary scaffold in the case of the embodiment in which the handrail 30 in which the connecting portion 132 of FIG. 8 is attached to both ends of the handrail main body 31 is spanned between the temporary scaffold components having a large cross-sectional diameter. 11 is shown. The temporary scaffold 11 includes a vertical member 13 made of a single pipe supported by a base spindle 12, a lower horizontal member 15 and an upper horizontal member 16 made of a single pipe coupled to the vertical member 13 by a clamp 14. The cloth plate 18 is stretched between the lower horizontal members 15, and the handrail 30 is stretched between the upper horizontal members 16.

  The horizontal member 16 serving as a temporary scaffold component is a single pipe having a larger cross-sectional diameter than the stiffener 7 of the building frame 3 of FIG. 1, but at both ends of the handrail body 31, as shown in FIGS. 6 and 7. By attaching the connecting part 132 of FIG. 8 instead of the connecting part 32, the handrail 30 can be applied to the temporary scaffold 11 of FIG.

  FIG. 11 shows a handrail 30 according to an embodiment in which the length of the handrail main body 31 is extendable. The handrail main body 31 of this embodiment is not formed of a single pipe material, and the handrail main body 31 has a flat portion 333A for connecting the connecting portion 32 with a bolt / nut 34 at one end. , 334A and the two basic pipe members 333 and 334, and one end side is inserted into one of the basic pipe members 333 and 334 having the same inner diameter and outer diameter, An extension pipe material 336 joined and integrated to the one basic pipe material 334 by a welded portion 335. Inside the other basic pipe material 333, the other end side of the extension pipe material 336 is slidable. Has been inserted.

  A nut 337 is attached to the outer peripheral surface of the basic pipe member 333, and a bolt 338 screwed into the nut 337 can penetrate the basic pipe member 333 and enter the pipe member 333. When the extension pipe member 336 is slid with respect to the basic pipe member 333 and the total length of the handrail body 31 reaches a predetermined length, the bolt 338 is rotated to strongly contact the tip of the extension pipe member 336. By doing so, the handrail main body 31 can be fixed to the length.

  According to this embodiment, since the length of the handrail main body 31 can be adjusted, the handrail 30 can also be used for various temporary scaffolds in which the distance between the two temporary scaffold components over which the handrail 30 is passed is different. Can be used in common, and the versatility of the handrail 30 is further improved.

  Making the length of the handrail main body extendable and contracting as in this embodiment can also be implemented in combination with making the connecting portion described in FIGS. 8 and 9 exchangeable.

  INDUSTRIAL APPLICABILITY The present invention can be used for a handrail provided on a temporary scaffold for worker safety.

It is a perspective view which shows the temporary scaffold for building construction sites where the handrail which concerns on one Embodiment of this invention is applied. It is a front view which shows the whole handrail shown by FIG. It is a perspective view which shows the connection part of a handrail. It is a front view of a base member. It is a front view of a floating member. It is a front view which shows the shape of the connection part before connecting a connection part with the stiffener of the building frame of FIG. 1 which is a structural member for temporary scaffolds. It is a front view which shows the shape of the connection part after connecting a connection part to the stiffener of the building frame of FIG. 1 which is a structural member for temporary scaffolds. It is a front view which shows embodiment of the connection part applicable to the structural member for temporary scaffolds with a large cross-sectional diameter. It is a front view which shows embodiment of the connection part applicable to the structural member for temporary scaffolds with a small diameter of a cross section. It is a perspective view of the temporary scaffold which shows the case where the connection part of a handrail is connected with the structural member for temporary scaffolds with a large diameter of a cross section. It is a partially broken front view of the handrail showing the embodiment in which the length of the handrail main body is extendable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Temporary scaffolding 3, Building frame which is a structural member for temporary scaffolding 7 Stiffening material of building frame 16 Horizontal material by single pipe which is a structural member for temporary scaffolding 30 Handrail 31 Handrail main body 32,132,232 Connection part 35, 135, 235 Base member 38, 138, 238 Floating member 42, 142, 242 First notch 47, 147, 247 Second notch 50, 150, 250 Insertion part 51 Stop means

Claims (4)

In the handrail for temporary scaffolding, in which both ends in the length direction of the handrail main body are provided with a connecting portion connected to the temporary scaffolding structural member constituting the temporary scaffolding,
The connecting portion is provided with an insertion portion that is opened in a circular or substantially circular shape, and is connected to the temporary scaffold component member by inserting the temporary scaffold component member into the insert portion,
The connecting portion is coupled to an end portion of the handrail main body, and is movable with respect to the base member so as to open and close the first notch portion and a base member formed with the first notch portion. And a floating member formed with a second notch, the first notch when the loose member is loosely moved with respect to the base member so as to close the first notch. The insertion part is formed by the second notch part,
The floating member is provided with a protrusion at an upper portion of the second notch, and the protrusion protrudes into the first notch when the floating member opens the first notch. By dropping the connecting portion toward the temporary scaffold component member, an upward load acts on the projection portion from the temporary scaffold component member, so that the floating member idles and closes the first notch portion,
In addition, the floating member is provided with a finger-hanging portion that hangs a finger to cause the floating member to perform a floating motion for opening the first notch portion, and the connection of both ends in the length direction of the handrail body The finger hooks provided for each part extend inward in the longitudinal direction of the handrail body and obliquely downward when the floating member closes the first notch. A special handrail for temporary scaffolding.   The handrail for a temporary scaffold according to claim 1, wherein the first member and the second member are used to stop the free movement of the floating member with respect to the base member when the insertion portion is formed by the first missing portion and the second missing portion. A handrail for a temporary scaffold characterized by comprising:   The handrail for a temporary scaffold according to claim 1 or 2, wherein the connecting portion is detachably attached to the handrail main body, and the connecting portion attached to the handrail main body is connected to the opening of the insertion portion. A handrail for a temporary scaffold, wherein the handrail can be replaced with another connecting portion having a different size.   The handrail for temporary scaffolding according to any one of claims 1 to 3, wherein a length of the handrail body is extendable.

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