CN202673119U - Bell-and-socket riveting-up straight steel ladder - Google Patents
Bell-and-socket riveting-up straight steel ladder Download PDFInfo
- Publication number
- CN202673119U CN202673119U CN 201220376011 CN201220376011U CN202673119U CN 202673119 U CN202673119 U CN 202673119U CN 201220376011 CN201220376011 CN 201220376011 CN 201220376011 U CN201220376011 U CN 201220376011U CN 202673119 U CN202673119 U CN 202673119U
- Authority
- CN
- China
- Prior art keywords
- cross bar
- montant
- riveting
- rises
- straight steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses a bell-and-socket riveting-up straight steel ladder which comprises a cross rod and vertical rods, the left end and the right end of the cross rod are respectively inserted in the vertical rods positioned at the left side and the right side of the cross rod, and are connected with the vertical rods in a matching manner, raised arc-shaped transition riveting-up teeth are arranged at the outer side of the cross rod at the positions where the cross rod and the vertical rods are connected, and the raised height of the arc-shaped transition riveting-up teeth is higher than the contact surface of the two at a position where the cross rod and the vertical rods are matched. According to the bell-and-socket riveting-up straight steel ladder, the tensile strength of the cross rod can be enhanced, stress concentration and sewage piling can be prevented, and the surface friction coefficient of the cross rod can be increased, so that the construction process is safer.
Description
Technical field
The utility model belongs to climbing device technical field scope.
Background technology
At present steel ladder mainly uses rectangular steel pipe to pass through the mode such as welding cross bar is connected with vertical rod, make it possess the climbing condition, only connect so that the bonding strength of cross bar and montant is lower with welding manner, and the junction causes stress to be concentrated easily, also be easier to pile up the application life that dirt has reduced steel ladder, smooth cross bar surface is also so that use steel ladder relatively more dangerous under some operating mode.
The utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of socket joint straight steel ladder of riveting that rises, and cross bar tensile strength is increased, and prevents that stress from concentrating and pile up dirt and increased the friction factor on cross bar surface, so that safer in the work progress.
For achieving the above object, the technical solution adopted in the utility model is: a kind of socket joint straight steel ladder of riveting that rises, comprise cross bar and montant, and it is characterized in that,
The montant that is positioned at the cross bar left and right sides is inserted respectively at two ends, the cross bar left and right sides, is connected with montant, and in the junction of cross bar and montant, the arc-shaped transition that the cross bar outside the is provided with projection tooth that rises,
The rise height of tooth projection of arc-shaped transition will be higher than the two contact surface of cross bar and montant cooperation place.
Further, described cross bar and montant are tubing, and cross bar one end inserts and stretches out from opposite side from a side of a montant, and the described arc-shaped transition tooth that rises is arranged on the two ends, the left and right sides of the cross bar of montant inside.
Further, the rise quantity of tooth of described arc-shaped transition is 4～8, distributes around cross bar in the cooperation place of cross bar and montant.
Further, the rise quantity of tooth of described arc-shaped transition is 8.
Further, rise tooth height 0.3～0.7mm, width 0.2～0.4mm, length 0.8～1.5mm of described arc-shaped transition.
Further, rise tooth height 0.5mm, width 0.3mm, length 1mm of described arc-shaped transition.
Further, described cross bar and montant are tubing, and an end of cross bar inserts and stretches out from the opposite side of montant from a side of a montant, and the part of stretching out is routed up the formation flange laterally, and the flange position forms arc transition, and fits closely with the montant outside.
Further, be distributed with the impression of shallow trace roll extrusion at described cross bar.
The arc-shaped transition that the utility model arranges at the two ends that cross bar the is positioned at montant tooth that rises plays the effect of axial location, adds to swing the location of crossing of rolling behind the flange, makes cross bar tensile strength increase by 12%; The part that cross bar stretches out montant is fitted closely with the montant outside after rolling through swinging, and arc transition is arranged, and prevents that stress from concentrating and pile up dirt; Impression through shallow trace roll extrusion on the cross bar has improved friction factor, can significantly not change friction factor because of work condition environment.
Other features and advantages of the utility model will be set forth in the following description, and, partly from manual, become apparent, perhaps understand by implementing the utility model.The purpose of this utility model and other advantages can realize and obtain by specifically noted structure in the manual of writing, claims and accompanying drawing.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and consists of the part of manual, is used from explanation the utility model with embodiment one of the present utility model, does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is that the rise master of the straight steel ladder of riveting of socket joint looks schematic diagram;
Fig. 2 is that schematic diagram is looked on the rise left side of the straight steel ladder of riveting of socket joint;
Fig. 3 is the rise schematic top plan view of the straight steel ladder of riveting of socket joint;
Fig. 4 is the partial enlarged drawing of Fig. 3.
The specific embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in restriction the utility model.
The utility model as shown in Figure 1, Figure 2, Figure 3 and Figure 4, provides a kind of socket joint straight steel ladder of riveting that rises,
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, present embodiment comprises cross bar 1 and montant 2, and two ends, cross bar 1 left and right sides are inserted respectively the montant 2 that is positioned at cross bar 1 left and right sides and are connected with montant 2, in the cooperation place of cross bar 1 with montant 2, cross bar 1 outside is provided with the arc-shaped transition tooth 3 that rises of projection
The rise height of tooth 3 projections of arc-shaped transition will be higher than the two contact surface of cross bar 1 and montant 2 cooperation places.
The rise quantity of tooth 3 of arc-shaped transition is 4～8, distributes around cross bar in the cooperation place of cross bar and montant.
The rise quantity of tooth 3 of arc-shaped transition is that 8 effects are better.
Arc-shaped transition rise tooth 3 height 0.3～0.7mm, width 0.2～0.4mm, length 0.8～1.5mm.
Arc-shaped transition rise tooth 3 highly for 0.5mm, width be 0.3mm, when length is 1mm, effect is better.
The part that cross bar 1 stretches out from montant 2 is routed up laterally and is formed flange 11, and the flange position forms arc transition, and fits closely with the montant outside.
Be distributed with the impression 12 of shallow trace roll extrusion on the cross bar 1.
The arc-shaped transition that the utility model arranges at the two ends that cross bar the is positioned at montant tooth that rises plays the effect of axial location, adds to swing the location of crossing of rolling behind the flange, makes cross bar tensile strength increase by 12%; The part that cross bar stretches out montant is fitted closely with the montant outside after rolling through swinging, and arc transition is arranged, and prevents that stress from concentrating and pile up dirt; Impression through shallow trace roll extrusion on the cross bar has improved friction factor, can significantly not change friction factor because of work condition environment.
Claims (8)
1. a socket joint straight steel ladder of riveting that rises comprises cross bar and montant, it is characterized in that,
The montant that is positioned at the cross bar left and right sides is inserted respectively at two ends, the cross bar left and right sides, is connected with montant, and in the junction of cross bar and montant, the arc-shaped transition that the cross bar outside the is provided with projection tooth that rises,
The rise height of tooth projection of arc-shaped transition will be higher than the two contact surface of cross bar and montant cooperation place.
2. the socket joint according to claim 1 straight steel ladder of riveting that rises, it is characterized in that, described cross bar and montant are tubing, and cross bar one end inserts and stretches out from opposite side from a side of a montant, and the described arc-shaped transition tooth that rises is arranged on the two ends, the left and right sides of the cross bar of montant inside.
3. the socket joint according to claim 1 straight steel ladder of riveting that rises is characterized in that, the rise quantity of tooth of described arc-shaped transition is 4～8, distributes around cross bar in the cooperation place of cross bar and montant.
4. the socket joint according to claim 3 straight steel ladder of riveting that rises is characterized in that, the rise quantity of tooth of described arc-shaped transition is 8.
5. the socket joint according to claim 1 straight steel ladder of riveting that rises is characterized in that, described arc-shaped transition rise tooth height 0.3～0.7mm, width 0.2～0.4mm, length 0.8～1.5mm.
6. the socket joint according to claim 4 straight steel ladder of riveting that rises is characterized in that, described arc-shaped transition rise tooth height 0.5mm, width 0.3mm, length 1mm.
7. the socket joint according to claim 1 straight steel ladder of riveting that rises, it is characterized in that, described cross bar and montant are tubing, one end of cross bar inserts and stretches out from the opposite side of montant from a side of a montant, the part of stretching out is routed up the formation flange laterally, the flange position forms arc transition, and fits closely with the montant outside.
8. the socket joint according to claim 1 straight steel ladder of riveting that rises is characterized in that, is distributed with the impression of shallow trace roll extrusion at described cross bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376011 CN202673119U (en) | 2012-07-30 | 2012-07-30 | Bell-and-socket riveting-up straight steel ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376011 CN202673119U (en) | 2012-07-30 | 2012-07-30 | Bell-and-socket riveting-up straight steel ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673119U true CN202673119U (en) | 2013-01-16 |
Family
ID=47494030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220376011 Expired - Fee Related CN202673119U (en) | 2012-07-30 | 2012-07-30 | Bell-and-socket riveting-up straight steel ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673119U (en) |
-
2012
- 2012-07-30 CN CN 201220376011 patent/CN202673119U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |