CN211229240U - Sliding support stair limiting device - Google Patents
Sliding support stair limiting device Download PDFInfo
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- CN211229240U CN211229240U CN201921528288.4U CN201921528288U CN211229240U CN 211229240 U CN211229240 U CN 211229240U CN 201921528288 U CN201921528288 U CN 201921528288U CN 211229240 U CN211229240 U CN 211229240U
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- spring
- inhaul cable
- anchor rod
- stair
- box body
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Abstract
The utility model discloses a sliding support stair limiting device, which comprises a spring inhaul cable (1), a limiting box (2) and an anchor rod (3); one end of the spring inhaul cable (1) is hinged with one end of the anchor rod (3), and the other end of the anchor rod (3) is anchored in the stair section; the other end of the spring inhaul cable (1) penetrates through an opening in the upper end of the limiting box (2) and is fixedly connected with the inner side of the limiting box (2), and the limiting box (2) is fixedly connected with the side face of the ladder beam. The utility model discloses a sliding support stair stop device utilizes the basalt fiber material corrosion-resistant, the quality is light, the high characteristic of tensile strength, adopts the adjustable structure of spring and cable sectional type, restricts sliding support's too big displacement when guaranteeing to shake stair sliding support shock insulation effect performance, has good durability, extensive engineering suitability and easily later stage maintenance.
Description
Technical Field
The utility model belongs to the technical field of building structure shock insulation, especially a when guaranteeing to shake stair sliding support shock insulation effect performance limit sliding support's sliding support stair stop device of too big displacement.
Background
According to the structure of a sliding support in the national building standard design drawing set cast-in-place concrete slab stair (15GB307), two layers of plastic sheets with the thickness of 0.5mm are additionally arranged at the lap joint of a stair section and a stair beam, so that the stair section is separated from the lower stair beam. In the earthquake, the ladder sections and the ladder beams displace along with the structure, and the ladder sections and the ladder beams are not rigidly connected, so that the K-shaped supporting effect of the traditional common staircase is eliminated. The sliding support can effectively reduce the rigidity of the staircase, and prevents the staircase components from absorbing excessive earthquake energy, so that the internal force and deformation damage of earthquake force to the staircase components are reduced, the safety of the structure is ensured, the safety evacuation function of the staircase is effectively exerted, and the sliding support is widely applied as a staircase shock insulation measure in practical engineering.
However, a large number of experimental researches show that under the conditions of medium and large earthquakes, the stair sliding support has the hidden troubles of lap joint and separation of the ladder sections and the ladder beams, tilting of the ladder plates and overlarge displacement, and the use of the stair as a safe escape channel during the earthquakes is seriously influenced.
The Chinese patent with the publication number of CN 207079832U invents a limited slip system on the basis of a stair sliding support, a vertical limiting bolt is designed at the joint of a stair section and a lower end stair beam, the effect of resisting earthquake force by means of shearing resistance between the bolt and concrete is utilized, but a limiting device is arranged in a structure and becomes a part of the structure, so that the limiting device cannot be overhauled and replaced in the later period, the problem of corrosion of reinforcing steel bars is caused, and the limited slip system is constructed and constructed while pouring the concrete stair and is only suitable for construction projects.
Therefore, the prior art has the problems that: how to guarantee that the too big displacement of stair sliding support when shaking isolation effect performance restriction sliding support, stop device has good durability and extensive engineering suitability.
Disclosure of Invention
An object of the utility model is to provide a sliding support stair stop device utilizes the too big displacement of restriction sliding support when the good, high advantage of tensile strength of basalt fiber durability guarantees to shake stair sliding support shock insulation effect performance.
Realize the utility model discloses the technical solution of purpose does:
a sliding support stair limiting device comprises a spring inhaul cable 1, a limiting box 2 and an anchor rod 3;
one end of the spring inhaul cable 1 is hinged with one end of the anchor rod 3, and the other end of the anchor rod 3 is used for anchoring in a stair section;
the other end of the spring inhaul cable 1 penetrates through an opening in the upper end of the limiting box 2 and is fixedly connected with the inner side of the limiting box 2, and the limiting box 2 is fixedly connected with the side face of the ladder beam.
Compared with the prior art, the utility model, it is showing the advantage and is:
1. effectively prevent too big displacement: the utility model adopts basalt fiber inhaul cable which has higher tensile strength and smaller deformation than common steel bar and other materials, and the anchor rod and the spacing box are reliably anchored on the ladder section and the ladder beam, thus ensuring the transmission of the drawknot force; the maximum extension amount of the spring in the limiting box is calculated and converted through trigonometric theorem and is the maximum allowable displacement value between the ladder section and the ladder beam, and when the relative displacement between the ladder section and the ladder beam reaches the limiting value, the relative displacement between the ladder beam and the ladder section connected by the anchor rod, the inhaul cable and the limiting box is restricted.
2. The shock insulation effect is not influenced: in the range of the allowed value of the sliding displacement, the anchor rod below the ladder section drives the inhaul cable to be capable of freely stretching and rotating at the notch of the fan-shaped limiting box in a hinged mode, the spring is fixedly hinged in the limiting box, and the stretching amount is converted into the relative sliding value of the ladder beam and the ladder section through trigonometric theorem; the device does not damage the sliding support device, does not influence the working performance of the sliding support, and only restrains the relative positions of the ladder beam and the ladder section.
3. The durability is good: the basalt fiber serving as an inorganic non-metallic material has good corrosion resistance, is not degraded and does not need external protection, the effective transmission of the tensile force is ensured in the device, and the service life of the limiting device is prolonged.
4. The adaptability is good: the device adopts a spring and basalt fiber inhaul cable sectional type structure, and can adjust the budget setting and manufacture the sizes of all parts of the limiting device according to actual requirements aiming at different stair forms and sizes in engineering; stop device installs in the outside of stair component, and convenient construction and easy later stage are overhauld and are changed, need not to pour the in-process at the stair and install or lift by crane etc. complicated or probably to the destructive construction step of component to the stair component built, therefore extensive applicability.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is the structure schematic diagram of the sliding support stair limiting device of the utility model.
Fig. 2 is a schematic view of the spring cable structure in fig. 1.
FIG. 3 is a front cross-sectional view of the anchor of FIG. 1.
FIG. 4 is a side cross-sectional view of the anchor of FIG. 1.
Fig. 5 is a schematic structural view of the limiting box in fig. 1.
Fig. 6 is a schematic view of the anchor rod of fig. 1.
Fig. 7 is a schematic view of the fastening mat of fig. 1.
Fig. 8 is a schematic view of the fastening bolt of fig. 1.
Fig. 9 is the utility model discloses working condition schematic diagram under the different operating modes of sliding support stair stop device.
In the figure, a spring cable 1, a limiting box 2, an anchor rod 3, a fastening bolt 4, a cable 11, a spring 12, a first anchorage device 131, a second anchorage device 132, a backing plate 14, a fixing plate 21, a cross rod 22, a box body 23, a fixing plate anchoring hole 24, a fastening backing plate 31, an anchor rod hole 32 and a fastening backing plate anchoring hole 33.
Detailed Description
As shown in fig. 1, the sliding support stair limiting device of the utility model comprises a spring inhaul cable 1, a limiting box 2 and an anchor rod 3;
one end of the spring inhaul cable 1 is hinged with one end of the anchor rod 3, and the other end of the anchor rod 3 is used for anchoring in a stair section;
the other end of the spring inhaul cable 1 penetrates through an opening in the upper end of the limiting box 2 and is fixedly connected with the inner side of the limiting box 2, and the limiting box 2 is fixedly connected with the side face of the ladder beam.
As shown in fig. 2, 3 and 4, the spring cable 1 comprises a cable 11 and a first anchorage 131 and a second anchorage 132 anchored to both ends of the cable 11 respectively,
the other end of the first anchorage device 131 is provided with a hinge hole for being hinged with the anchor rod 3;
the other end of the second anchor 132 is fixedly connected with the center of one side of a backing plate 14, the center of the other side of the backing plate 14 is fixedly connected with one end of a spring 12, and the other end of the spring 12 is provided with a pull ring.
Compared with the common steel bar rod piece material, the inhaul cable 11 made of basalt fiber has the advantages of high tensile strength, corrosion resistance and light weight.
The diameter of the basalt fiber rib material is 10-12 mm, and the length of the basalt fiber is 240-260 mm.
The first anchor 131 and the second anchor 132 are anchored to one end of the cable 11 by using epoxy resin doped with reduced iron powder.
The first anchorage device 131 and the second anchorage device 132 have an outer diameter of 16mm, an inner diameter of 10mm and a length of 50 mm.
The first anchorage device 131 and the second anchorage device 132 are internally provided with 5-degree slope groove holes, the stay cable end of the basalt fiber stay cable 11 is extruded into the small bore end of the anchorage device, the first anchorage device 131 is reserved with a hinge rod hole, and one end of the second anchorage device 132 and one end of the spring 12 are respectively welded on the central positions of two surfaces of the backing plate 14.
As shown in fig. 5, the limiting box 2 comprises a box body 23 with an opening at the upper part, a cross bar 22 is arranged in the box body 23, the cross bar 22 passes through a pull ring of a spring 12 at one end of the spring pull rope 1, two ends of the cross bar are respectively fixed on the left inner side wall and the right inner side wall of the box body 23,
the rear side of the box body 23 is fixedly connected with a vertical fixing plate 21, and a fixing plate anchoring hole 24 for fixedly connecting with the side surface of the ladder beam is formed in the fixing plate 21; the fixing plates 21 protrude out of the left side and the right side of the box body 23, and are convenient to be connected with the side faces of the ladder beam in an anchoring mode. For example expansion bolts 4.
The thickness of 2 box bodies of spacing box 23 is preferred 8 ~ 10mm, highly preferred 130 ~ 150mm, and the width is preferred 80 ~ 100mm, and the opening width is preferred 20 ~ 25mm, and spacing box both sides fixed plate 21 salient in box body 23 width is preferred 60 ~ 10 mm.
The backing plate 14 of the spring cable 1 is positioned on the inner side of the box body 23, and the second anchorage device 132 penetrates through the upper opening of the box body 23 and is anchored with the cable 11;
in a natural state, a gap exists between the upper surface of the backing plate 14 and the upper opening of the box body 23, and the second anchorage 132 is not in contact with the edge of the upper opening of the box body 23.
As shown in figure 6 of the drawings,
the anchoring end of the anchor rod 3 is threaded, and the hinged end thereof passes through an anchor rod hole 32 of a fastening backing plate 31 and is hinged with a first anchor device 131.
As shown in figure 7 of the drawings,
the fastening backing plate 31 is provided with fastening backing plate anchoring holes 33 around for anchoring with the stair sections.
As shown in the figures 1-8 of the drawings,
and (3) drilling a hole on the vertical working surface below the second step of the stair tread to remove dust, adding an anchoring agent, sleeving the anchor rod 3 into a reserved anchor rod hole 32 of the fastening backing plate 31, extruding the anchor rod 3 into the hole and filling the anchoring agent to remove gaps. The shockproof fastening bolt 4 with a special structure penetrates through the reserved fastening cushion plate anchoring hole 33 of the fastening cushion plate 31 to fix the anchor rod 3 and the fastening cushion plate 31 below the stairs. The anchoring end of the anchor rod 3 made of high-strength steel is provided with threads, so that the anchoring friction force is enhanced.
The other end of the anchor rod 3 is provided with a hinging device which is hinged with an anchorage device 131 of the inhaul cable 11, a hinging rod passes through the hinging device on the anchor rod 3 and a reserved hinging hole on the anchorage device 131, and the hinging rod is welded on the hinging device of the anchor rod 3 to ensure that the spring inhaul cable 1 can rotate around the anchor rod 3. The diameter of the anchor rod 3 is preferably 16-20 mm, and the embedding depth is preferably 110-140 mm.
In the integral installation process, no stress is applied to the basalt fiber inhaul cable 11; the welding seam and the epoxy resin at the anchoring part of the welding part can bear external force after the consolidation is finished.
As shown in fig. 9.b, it is a schematic view of the installation of the position-limiting device in a natural state. The device adopts a sectional type structure of the inhaul cable 11 and the spring 12, and the sizes of all parts of the limiting device can be calculated and made in advance according to the form of an actual stair and the size of a displacement limit value, so that after the integral installation of the limiting device is finished, the spring cushion plate 14 is ensured not to generate pressure or pulling force on the spring 12; the stay cable 11 is positioned in the middle of the slotted opening, and the first anchorage device 132 of the stay cable 11 is not contacted with the slotted opening; the outer end of the anchor rod 3, the basalt fiber inhaul cable 11 and the high-strength steel spring 12 are positioned on a straight line;
as shown in fig. 9.a and 9.c, the schematic diagram of the relative displacement between the limiting device and the ladder beams and ladder sections under the action of earthquake force is shown. The device is arranged on the outer sides of the stair sections and the stair beams, and does not influence the performance of the shock insulation effect of the sliding support of the stair. Because this device is at the pin joint that ladder roof beam and bench outside department adopted, the elastic restoring force of spring 12 and 11 pulling forces of cable can all effectively transmit along with the relative displacement of bench and ladder roof beam. The spring 12 is hinged and fixed in the limiting box, the stretching amount is converted into a relative sliding value of the ladder beam and the ladder section through the trigonometric theorem, the distance between the spring base plate 14 and the notch in the limiting box 2 is 25-35 mm, and the limiting device is guaranteed to play a role in restraining the stair sliding support during earthquake and allow the sliding support to move 0-50 mm.
When the bench on the sliding support slides outwards to reach the limit value of 50mm, the stretched spring 12 prevents the bench from extending continuously due to the backing plate 14 and the box body 23, at the moment, the spring inhaul cable 1 is in a stretching stress state, the anchor rod 3 and the limit box 2 which are reliable in anchoring tie the bench beam and the bench, and the bench is prevented from moving outwards continuously, so that the bench is prevented from being separated under the action of earthquake force.
When the bench on the sliding support slides inwards, the bench and the ladder beam do not slide inwards when the bench slides inwards for about 50mm because the stair structure reserves a 50mm long notch below the bench and is filled with flexible material for plugging, and the fan-shaped limiting box 2 allows the spring stay rope 1 to move along with the bench without affecting the shock insulation effect of the sliding support.
Claims (8)
1. The utility model provides a sliding support stair stop device which characterized in that:
comprises a spring inhaul cable (1), a limit box (2) and an anchor rod (3);
one end of the spring inhaul cable (1) is hinged with one end of the anchor rod (3), and the other end of the anchor rod (3) is anchored in the stair section;
the other end of the spring inhaul cable (1) penetrates through an opening in the upper end of the limiting box (2) and is fixedly connected with the inner side of the limiting box (2), and the limiting box (2) is fixedly connected with the side face of the ladder beam.
2. The spacing device of claim 1, wherein:
the spring inhaul cable (1) comprises an inhaul cable (11) and a first anchorage device (131) and a second anchorage device (132) which are respectively anchored with the two ends of the inhaul cable (11),
the other end of the first anchor (131) is provided with a hinge hole for being hinged with the anchor rod (3);
the other end of the second anchor (132) is fixedly connected with the center of one surface of a backing plate (14), the center of the other surface of the backing plate (14) is fixedly connected with one end of a spring (12), and the other end of the spring (12) is provided with a pull ring.
3. The spacing device of claim 2, wherein:
the inhaul cable (11) is made of basalt fibers.
4. A spacing device according to claim 3, characterized in that:
the diameter of the basalt fiber rib material is 10-12 mm, and the length of the basalt fiber is 240-260 mm.
5. The spacing device of claim 4, wherein:
the first anchorage device (131) and the second anchorage device (132) are 16mm in outer diameter, 10mm in inner diameter and 50mm in length.
6. The spacing device of claim 2, wherein:
the limiting box (2) comprises a fan-shaped box body (23) with an opening at the upper part, a cross rod (22) is arranged in the box body (23), the cross rod (22) penetrates through a pull ring of a spring (12) at one end of the spring pull rope (1), two ends of the pull ring are respectively fixed on the left inner side wall and the right inner side wall of the box body (23),
the rear side of the box body (23) is fixedly connected with a vertical fixing plate (21), and a fixing plate anchoring hole (24) for fixedly connecting with the side face of the ladder beam is formed in the fixing plate (21);
the backing plate (14) of the spring inhaul cable (1) is positioned on the inner side of the box body (23), and the second anchorage device (132) penetrates through an opening in the upper part of the box body (23) and is anchored with the inhaul cable (11);
in a natural state, a gap exists between the upper surface of the backing plate (14) and the upper opening of the box body (23), and the second anchorage device (132) is not in contact with the edge of the upper opening of the box body (23).
7. The spacing device of claim 2, wherein:
the anchoring end of the anchor rod (3) is provided with threads, and the hinged end of the anchor rod (3) penetrates through an anchor rod hole (32) of a fastening backing plate (31) and is hinged with a first anchor device (131).
8. The spacing device of claim 7, wherein:
the periphery of the fastening backing plate (31) is provided with fastening backing plate anchoring holes (33) for anchoring with stair flights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921528288.4U CN211229240U (en) | 2019-09-16 | 2019-09-16 | Sliding support stair limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921528288.4U CN211229240U (en) | 2019-09-16 | 2019-09-16 | Sliding support stair limiting device |
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| Publication Number | Publication Date |
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| CN211229240U true CN211229240U (en) | 2020-08-11 |
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| CN201921528288.4U Active CN211229240U (en) | 2019-09-16 | 2019-09-16 | Sliding support stair limiting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593499A (en) * | 2019-09-16 | 2019-12-20 | 扬州大学 | Sliding support stair limiting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593499A (en) * | 2019-09-16 | 2019-12-20 | 扬州大学 | Sliding support stair limiting device |
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