CN211173052U - Scaffold handrail - Google Patents
Scaffold handrail Download PDFInfo
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- CN211173052U CN211173052U CN201921545960.0U CN201921545960U CN211173052U CN 211173052 U CN211173052 U CN 211173052U CN 201921545960 U CN201921545960 U CN 201921545960U CN 211173052 U CN211173052 U CN 211173052U
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- coupling wedge
- scaffold
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- engaged
- wedge
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Abstract
Can improve the scaffold handrail of assembling nature and security. The scaffold handrail comprises a main body part, 2 1 st clamping parts, 2 supporting pieces and 2 nd clamping parts, and is fixed to the support column through the clamping of the 1 st clamping part and the 2 nd clamping part with clamped parts which are arranged on the stand column and correspond to the 1 st clamping part and the 2 nd clamping part respectively. The 2 nd engaging portion includes a housing portion and a coupling wedge movable relative to the housing portion, and the coupling wedge includes: an insertion portion for engaging the 2 nd engaging portion with the engaged portion of the pillar by inserting the insertion portion into the corresponding engaged portion; and a guide portion that guides movement of the coupling wedge relative to the housing portion, the coupling wedge being movable between an insertion position at which the insertion portion is inserted into the engaged portion and an extraction position at which the insertion portion is extracted from the engaged portion, the guide portion being formed with a coupling wedge holding portion that engages with a 1 st pin provided in the housing portion in a state in which the coupling wedge is moved to the extraction position to hold the coupling wedge at the extraction position.
Description
Technical Field
The utility model relates to a scaffold handrail.
Background
Japanese patent laid-open No. 2009-150197 discloses a scaffold handrail (securing hand) with a support. As shown in fig. 7(a) and 7(b), the attachment parts 112 provided at both ends of the horizontal member 100 and the couplers 150 provided at the end portions 120b and 130b of the braces 120 and 130 are inserted into the engaged portions 141 of the corresponding posts 140, and are fixed between the two columns of the scaffold.
However, in the above-described structure of the scaffold handrail, when the coupling 150 and the engaged portion 141 of the end portion 120b of one of the braces 120 are disengaged and then the coupling 150 and the engaged portion 141 of the end portion 130b of the other brace 130 are disengaged when the scaffold handrail is disassembled, the brace 120, which is disengaged first, rotates about the corresponding end portion of the horizontal member 100. In this case, the worker needs to disassemble the other supporting member 130 after the rotation of the supporting member 120, which has been disengaged first, is completed. Therefore, the efficiency of disassembling the scaffold handrail is deteriorated, and the assemblability of the scaffold handrail is deteriorated.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a scaffold handrail which can improve assembling performance and safety.
A scaffold handrail for solving the above problems, which is provided between a pair of adjacent posts of a scaffold, includes: a main body portion; 2 1 st engaging portions provided at both end portions of the main body portion, respectively; 2 supporting pieces which are respectively connected with the 1 st clamping parts in a rotatable manner through the 1 st end parts; and 2 nd engaging portions provided at 2 nd end portions of the 2 support members, respectively, the scaffold arm being fixed to the column by the 1 st engaging portion and the 2 nd engaging portion being engaged with engaged portions provided on the column corresponding to the 1 st engaging portion and the 2 nd engaging portion, respectively, the scaffold arm being characterized in that the 2 nd engaging portion includes a housing portion and a coupling wedge movable relative to the housing portion, the coupling wedge including: an insertion portion that engages the 2 nd engaging portion with the engaged portion when the insertion portion is inserted into the corresponding engaged portion; and a guide portion that guides movement of the coupling wedge relative to the housing portion, the coupling wedge being movable between an insertion position at which the insertion portion is inserted into the engaged portion and an extraction position at which the insertion portion is extracted from the engaged portion, a coupling wedge holding portion being formed in the guide portion, the coupling wedge holding portion being engaged with a 1 st pin provided in the housing portion in a state where the coupling wedge is moved to the extraction position to hold the coupling wedge at the extraction position.
According to this configuration, the coupling wedge holding portion is formed in the coupling wedge guide portion, and the coupling wedge holding portion engages with the 1 st pin in a state where the coupling wedge is moved to the extraction position, thereby holding the coupling wedge at the extraction position. When the scaffold arm is detached, the one coupling wedge from which the engagement is released is held at the pulled-out position, so that the support from which the engagement is released can be prevented from rotating about the 1 st engagement portion. Further, since the coupling wedge is held at the pulled-out position, it is not necessary to wait until the rotation of the support member from which the engagement is released stops, and the engagement of the other support member can be performed, so that the assemblability of the scaffold handrail can be improved.
Preferably, in the above scaffold handrail, the coupling wedge holding portion is a notch formed in the guide portion.
According to this configuration, the connecting wedge holding portion is a notch formed in the guide portion. Therefore, the forming of the coupling wedge holding portion is simplified, and therefore, the manufacturing cost of the coupling wedge holding portion, and even the scaffold handrail can be reduced.
In the above-described scaffold armrest, preferably, the housing portion is further provided with a 2 nd pin, and a retaining portion that protrudes outward in the width direction of the guide portion is formed on the opposite side of the guide portion from the side where the coupling wedge holding portion is formed, and the retaining portion prevents the coupling wedge from moving further from the extracted position and coming off the housing portion so as to be locked to the 2 nd pin.
According to this configuration, the guide portion is formed with a retaining portion that protrudes outward in the width direction of the guide portion on the side opposite to the side where the coupling wedge holding portion is formed, and the retaining portion prevents the coupling wedge from further moving from the extracted position and being released from the case portion so as to be locked to the 2 nd pin. Since the coupling wedge cannot be detached from the housing portion, the coupling wedge can be prevented from falling as compared with a case where the coupling wedge is provided separately from the housing portion, and thus safety in assembling the scaffold handrail can be improved.
In the above-described scaffold handrail, a wide portion whose width is set to be larger than the thickness of the guide portion is preferably integrally formed at an upper end portion of the guide portion.
According to this configuration, since the wide portion is integrally formed at the upper end portion of the guide portion, the coupling wedge can be easily struck as compared with a case where the wide portion is not formed at the guide portion, and the assemblability of the scaffold handrail can be further improved.
In the above-described scaffold armrest, preferably, a brace holding portion that holds the brace is provided in the 1 st engagement portion so as to partially recess the 1 st engagement portion.
According to this configuration, the 1 st engaging portion is provided with the stay holding portion. Therefore, the support holder can hold the support when the scaffold handrail is transported or stored, and thus the transportability of the scaffold handrail can be improved.
Drawings
Fig. 1 is a schematic view illustrating an assembled state of a scaffold handrail of an embodiment.
Fig. 2 is a perspective view illustrating the scaffold handrail in fig. 1.
Fig. 3 is a partially enlarged view of a portion shown by a dotted line in fig. 2.
Fig. 4 is a schematic view showing a state before the joining of the stay and the support member.
Fig. 5 is a schematic view showing a state before the joining of the stay and the support member.
Fig. 6(a) is a schematic view showing a modification of the temporary engagement portion of the scaffold handrail.
Fig. 6(b) is a schematic view showing another modification of the temporary engagement portion of the scaffold handrail.
Fig. 7(a) is a schematic view of a conventional scaffold arm, and fig. 7(b) is a partially enlarged view of the conventional scaffold arm.
Detailed Description
< example 1>
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in fig. 1 and 2, the scaffold 1 includes a scaffold arm (hereinafter, referred to as an arm) 2, a column 3, and a footrest 4. The scaffold 1 is formed by horizontally arranging handrails 2 and footrests 4 between a pair of adjacent columns 3 so as to alternate in the height direction (vertical direction in fig. 1) of the scaffold 1. The post 3 is formed with an engaged portion 5 having a cross section in the shape of コ.
The handrail 2, set up between an adjacent pair of pillars 3 of the scaffold 1, includes: a main body portion 20; 2 1 st engaging portions 30 provided at both ends of the main body portion 20; 2 supports 50 rotatably connected to the 1 st engaging portion 30 through the 1 st end portions 51, respectively; and 2 nd engaging portions 40 provided at the 2 nd end portions 52 of the support 50, respectively. The armrest 2 is fixed to the pillar 3 by the engagement of the 1 st engagement portion 30 and the 2 nd engagement portion 40 with the engaged portions 5 provided on the pillar 3 in correspondence with the 1 st engagement portion 30 and the 2 nd engagement portion 40, respectively.
The footrest 4 is provided between a pair of adjacent vertical posts 3 by hooking hooks provided at both ends in the width direction thereof to a cross post (not shown) provided between the adjacent two vertical posts 3 in the width direction (the paper direction in fig. 1) of the scaffold 1, similarly to a footrest of a general scaffold.
As shown in fig. 3, the 1 st engaging portion 30 is formed by bending a metal plate into a U shape, and includes a bottom wall 31 and two side walls 32 and 33. The grooves 34 are formed in the two side walls, respectively, and the grooves 34 are formed by opening from the lower end portions 32a, 33a to the upper end portions 32b, 33b of the two side walls 32, 33 of the 1 st engaging portion 31. One end 51 of each support 50 is inserted between the two side walls 32, 33 of the 1 st engaging portion 30 and fixed to the 1 st engaging portion 30 with a bolt 35. The 1 st engaging portion 30 is engaged with the groove 34 by the engaged portion 5, and is fixed to the corresponding pillar 3.
A brace holding portion 36 is formed on one side wall 33 of the 1 st engaging portion 30, and the brace holding portion 36 is formed so as to recess a portion of the side wall 33 of the 1 st engaging portion 30 near the lower end portion 33a, and although not shown, the brace holding portion 36 engages with the brace 50 to hold the brace 50 when the handrail 2 is carried or stored.
As shown in fig. 4 and 5, the 2 nd engaging portion 40 includes a case portion 60 and a coupling wedge 70, and the case portion 60 is formed by bending a metal plate into a U-shape and has a bottom wall 61 and two side walls 62 and 63. The case 60 has an opening 64, and the opening 64 is formed by cutting a part of the bottom wall 61 and the two side walls 62 and 63. The height direction (vertical direction in fig. 5) of the scaffold 1 in the opening 64 is set to be larger than the height direction of the scaffold 1 in the engaged portion 5. The 2 nd end portion 52 of each stay 50 is inserted between the two side walls 62, 63 of the case portion 60, fixed to the case portion 60 with bolts 35 or the like, and fixed to the 2 nd engaging portion 40.
A 1 st pin 65 and a 2 nd pin 66 are provided between the two side walls 62, 63 of the housing portion 60. The 1 st pin 65 is provided at a position close to the engaged portion 5 of the lower end portion 67 of the case portion 60, and the 2 nd pin 66 is provided at a position away from the engaged portion 5 of the upper end portion 68 of the case portion 60.
The coupling wedge 70 is made of a metal material and is movable relative to the housing portion 60. The joining wedge 70 includes: an insertion portion 71 formed by bending one end portion (an upper end portion 73 in fig. 4 and 5) of the coupling wedge 70, and engaging the 2 nd engaging portion 40 with the engaged portion 5 by inserting the insertion portion 71 into the engaged portion 5 and engaging the same; and a guide portion 72 that guides movement of the coupling wedge 70 relative to the housing portion 60.
The coupling wedge 70 is movable between an insertion position at which the insertion portion 71 is inserted into the engaged portion 5 and an extraction position at which the insertion portion 71 is extracted from the engaged portion 5.
A connecting wedge holding portion 75 having an inverted L shape is formed at the other end portion (lower end portion 74 in fig. 4 and 5) of the guide portion 72, and the connecting wedge holding portion 75 is a notch formed in the guide portion 72, in the present embodiment, the connecting wedge holding portion 75 is formed on the side of the lower end portion 74 of the connecting wedge 70 closer to the strut 3.
A retaining portion 76 that protrudes outward in the width direction of the coupling wedge 70 is formed on the opposite side of the coupling wedge 70 from the side where the coupling wedge holding portion 75 is formed, and the retaining portion 76 prevents the coupling wedge 70 from moving further from the extracted position and falling off the housing portion 60 so as to be locked to the 2 nd pin 66.
A wide portion 77 is formed at the upper end 73 of the coupling wedge 70, and the width of the wide portion 77 is formed to be larger than the thickness of the guide portion 72.
The method of forming the coupling wedge 70 is not particularly limited, and it is formed by forging in the present embodiment.
Hereinafter, a method of assembling the scaffold will be described.
As shown in fig. 1, the pillars 2 are assembled.
The two supports 50 of the handrail 2 are gripped, and the 1 st engaging portions 30 of the handrail 2 are engaged with the engaged portions 5 of the corresponding support posts 3.
The support 50 crosses between the adjacent pair of the posts 3, and moves the housing portion 60 of the 2 nd engaging portion 40 to a position corresponding to the engaged portion 5 of the corresponding post 3.
The case 60, that is, the 2 nd engaging portion 40 is engaged with the engaged portion 5 by striking the wide portion 77 of the coupling wedge 70 with a hammer to insert the coupling wedge 70 into the engaged portion 5 and moving the coupling wedge 70 to the insertion position.
A footboard 4 is fixed to a pair of columns 3 provided adjacent in the width direction of the scaffold 1. The above-described steps, that is, the steps of installing the handrail 2 on the upper floor and then installing the step boards 4 are repeated to assemble the scaffold 1.
Hereinafter, a method of removing the scaffold will be described.
In a state where the step 4 on the upper stage is removed, the lower end 74 of one coupling wedge 70 of the armrest 2 is struck with a hammer, thereby disengaging the coupling wedge 70 from the engaged portion 5.
The coupling wedge 70 is pulled out until the coupling wedge 70 moves to the pulled-out position. In a state where the coupling wedge 70 is moved to the extraction position, the coupling wedge holding portion 75 engages with the 1 st pin 65, thereby holding the coupling wedge 70 at the extraction position.
In this state, the lower end 74 of the other coupling wedge 70 of the armrest 2 is struck with a hammer to release the engagement between the coupling wedge 70 and the engaged portion 5.
The grip support 5 lifts up the handrail 2, and the 2 1 st engaging portions 30 of the handrail 2 are disengaged from the engaged portions 5.
The scaffold 1 is disassembled by repeating the above steps.
The operation and effect of the present invention will be described below.
(1) A coupling wedge holding portion 75 is formed in the guide portion 72 (the lower end portion 74 of the coupling wedge 70), and in a state where the coupling wedge 70 is moved to the withdrawal position, the coupling wedge holding portion 75 engages with the 1 st pin 65 of the housing portion 60, thereby holding the coupling wedge 70 at the withdrawal position. When the armrest 2 is removed, the one coupling wedge 70 from which the engagement has been released is held at the pulled-out position, and therefore the engagement-released preventive stay 50 can be prevented from rotating about the 1 st engagement portion 30. Further, since the coupling wedge 70 is held at the pulled-out position, it is not necessary to wait until the rotation of the support 50 released from the engagement is stopped, and the engagement of the other support 50 can be performed, so that the assemblability of the armrest 2 can be improved.
(2) The coupling wedge holding portion 75 is a notch formed in the guide portion 72. Therefore, the forming of the coupling wedge holding portion 75 becomes simple, and the manufacturing cost of the coupling wedge holding portion 75 and the handrail 2 can be reduced.
(3) A retaining portion 76 protruding in the width direction of the guide portion 72 is formed on the opposite side of the guide portion 72 from the side where the coupling wedge holding portion 75 is formed, and the retaining portion 76 is locked to the 2 nd pin 66, so that the coupling wedge 70 can be prevented from further moving from the pulled-out position and being removed from the housing portion 60. Since the coupling wedge 70 cannot be detached from the housing portion 60, the coupling wedge 70 can be prevented from falling off as compared with a case where the coupling wedge 70 is provided separately from the housing portion 60, and thus the safety when assembling the armrest 2 can be improved.
(4) Since the wide portion 77 is formed at the upper end portion 73 of the guide portion 72, the connecting wedge 70 can be easily struck compared to a case where the wide portion 77 is not formed at the guide portion 72, and the assembling property of the handrail 2 can be further improved.
(5) A holder holding portion 36 for holding the holder 50 is formed on one side wall 33 of the 1 st engaging portion 30. Therefore, since the brace holding portion 36 holds the brace 50 when the handrail 2 is carried or stored, the carrying property of the handrail 2 can be improved.
The above embodiment may be modified as follows.
In the above embodiment, the coupling wedge holding portion 75 is formed in the shape of an inverted L, but the coupling wedge holding portion 75 may be formed in other shapes as long as the coupling wedge 70 can be held at the extraction position in a state where the coupling wedge 70 is moved to the extraction position, for example, the coupling wedge holding portion 75 may be formed in a hook shape (see fig. 6(a)), or may be formed in a groove shape (see fig. 6 (b)).
In the above embodiment, the wide width portion 77 is formed in the guide portion 72 (the upper end portion 73 of the coupling wedge 70), but the wide width portion 77 may be omitted.
Claims (5)
1. A scaffold handrail disposed between an adjacent pair of posts of a scaffold, comprising: a main body portion; 2 1 st engaging portions provided at both end portions of the main body portion, respectively; 2 supporting pieces which are respectively connected with the 1 st clamping parts in a rotatable manner through the 1 st end parts; and 2 nd engaging portions provided at 2 nd end portions of the 2 support members, respectively, the scaffold handrail being fixed to the column by the 1 st engaging portion and the 2 nd engaging portion being engaged with engaged portions provided on the column corresponding to the 1 st engaging portion and the 2 nd engaging portion, respectively,
the scaffold handrail is characterized in that,
the 2 nd engaging portion includes a housing portion and a coupling wedge movable relative to the housing portion,
the joining wedge includes: an insertion portion that engages the 2 nd engaging portion with the engaged portion when the insertion portion is inserted into the corresponding engaged portion; and a guide portion that guides movement of the coupling wedge relative to the housing portion,
the coupling wedge is movable between an insertion position at which the insertion portion is inserted into the engaged portion and an extraction position at which the insertion portion is extracted from the engaged portion,
a coupling wedge holding portion is formed in the guide portion, and the coupling wedge holding portion engages with a 1 st pin provided in the housing portion to hold the coupling wedge at the extraction position in a state where the coupling wedge is moved to the extraction position.
2. The scaffold handrail of claim 1,
the coupling wedge holding portion is a notch formed on the guide portion.
3. The scaffold handrail of claim 1,
a 2 nd pin is further provided on the housing portion,
a retaining portion that protrudes outward in the width direction of the guide portion is formed on the opposite side of the guide portion from the connecting wedge holding portion, and the retaining portion prevents the connecting wedge from further moving from the extracted position and falling off the case portion so as to be locked to the 2 nd pin.
4. The scaffold handrail of claim 1,
a wide portion is integrally formed at an upper end portion of the guide portion, and a width of the wide portion is set to be larger than a thickness of the guide portion.
5. The scaffold handrail of claim 1,
a support holding portion that holds the support is provided in the 1 st engaging portion so as to partially recess the 1 st engaging portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545960.0U CN211173052U (en) | 2019-09-17 | 2019-09-17 | Scaffold handrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545960.0U CN211173052U (en) | 2019-09-17 | 2019-09-17 | Scaffold handrail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211173052U true CN211173052U (en) | 2020-08-04 |
Family
ID=71805936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921545960.0U Active CN211173052U (en) | 2019-09-17 | 2019-09-17 | Scaffold handrail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211173052U (en) |
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2019
- 2019-09-17 CN CN201921545960.0U patent/CN211173052U/en active Active
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