PROTECTION SYSTEM WITH A CALIBRATED CLAMPING SYSTEM

Abstract

PROTECTION SYSTEM WITH A CALIBRATED CLAMPING SYSTEM The invention comprises a rail (100) including a shaft (102) carrying a first shoe (104) and having a passage (106), a slide (108) with a first end mounted to slide within the shaft (102) through the passage (106) and a second end (108a) having a bore (110), a locking means (112) for the slide (108) relative to the shaft (102), a threaded rod (114) inserted into the bore (110) and carrying a second shoe (116), and a nut (118) screwed onto the threaded rod (114), wherein the rail (100) further includes a spring (150) fitted around the threaded rod (114) between the nut (118) and the slide (108), and a secondary shaft (152) arranged around the spring (150) between the nut (118) and the slide. Fig. 1

Description

Title of the invention: PROTECTION SYSTEM WITH A CALIBRATED CLAMPING SYSTEM technical field

[0001] The present invention relates to a protection system, such as a rail or a post, more particularly a protection system implemented temporarily within the framework of a construction site, with a calibrated clamping system. PREVIOUS STATE OF THE ART

[0002] In a building under construction, it is known to use temporary protection systems which are fixed in such a way as to prevent a worker from falling.

[0003] Such a protection system takes, for example, the form of an extendable rail which is arranged horizontally across an opening or the form of a post which is fixed vertically along a floor or a staircase to which a handrail is attached.

[0004] Such an extendable rail classically comprises a shaft with, at a first end, a first shoe which is intended to come to rest against a wall of a building and which includes, for example, a stud which fits into a recess made in the wall.

[0005] The rail also includes a slide which is mounted to slide within the barrel at the second end of the barrel. One end of the slide is thus inside the barrel and the second end of the slide has a bore.

[0006] The rail also includes a locking means which locks the position of the slide relative to the barrel.

[0007] The rail also includes a threaded rod, the first end of which is inserted into the bore and the second end of which carries a second shoe which is intended to bear against another wall of the building and which includes, for example, a stud which fits into a recess made in the wall.

[0008] The rail also includes a nut screwed onto the threaded rod.

[0009] Installing the rail consists of placing the rail between the two walls, adjusting The slide is used to ensure the placement of the studs in the recesses; the slide is then locked with the locking device. The installation continues by tightening the nut against the second end of the slide so that the threaded rod protrudes from the bore and the second shoe moves away from the second end of the slide, which tends to separate the two shoes and secures the rail between the two walls.

[0010] Such a post conventionally comprises a shaft with, at one end, a first bracket intended to bear against an upper surface of a floor. The post also includes a sliding section mounted within the shaft at the first end of the shaft. One end of the sliding section is thus outside the shaft on the side of the first end of the shaft. The first end of the sliding section carries a second bracket intended to bear against a lower surface of a floor.

[0011] The post also includes a threaded rod, one end of which is inserted into the bore through the second end of the shaft.

[0012] The post also includes a nut screwed onto the threaded rod and attached to the second end of the slide.

[0013] The installation of the post consists of placing the brackets on either side of the floor, and turning the threaded rod to tighten the brackets against the floor.

[0014] Although such protection systems are satisfactory, the tightening forces of the nuts can have repercussions on the proper holding of the rail and / or the post in the event of insufficient tightening or on the degradation of the walls, the floor, or the protection systems in the event of excessive tightening.

[0015] It is therefore necessary to find a system which ensures proper tightening of the nut. Description of the invention

[0016] An object of the present invention is to propose a protection system such as an extendable rail or a clamping post with a calibrated clamping system.

[0017] For this purpose, a rail comprising: is proposed

[0018] - a shaft carrying at one end, a first shoe and at a second end, a passage,

[0019] - a slide having a first end mounted to slide in the barrel through the passage and a second end having a bore,

[0020] - a locking means arranged to alternately lock the slide relative to to the barrel or leave the slide free in relation to the barrel,

[0021] - a threaded rod, one end of which is inserted into the bore and one end of which the second end carries a second shoe, and

[0022] - a nut screwed onto the threaded rod,

[0023] the smooth surface being characterized in that it further comprises:

[0024] - a spring fitted around the threaded rod between the nut and the second end from behind the scenes, and

[0025] - a secondary barrel disposed around the spring between the nut and the second end behind the scenes.

[0026] Thanks to such an installation, the clamping force is guaranteed.

[0027] Advantageously, the first shoe is fixed to the barrel via a ball joint.

[0028] Advantageously, the second shoe is fixed to the threaded rod via a ball joint.

[0029] Advantageously, the nut takes the form of a wing nut.

[0030] The invention also proposes a post comprising:

[0031] - a shaft carrying at one end, a first shoe and a passage, and at one at the second end, a bore,

[0032] - a slide having a first end carrying a second shoe, and a second end mounted sliding inside the barrel through the passage and carrying a nut,

[0033] - a threaded rod, one end of which protrudes through the bore, and one The second end is screwed into the nut.

[0034] - a tightening / loosening means integral with the first end of the threaded rod,

[0035] the post being characterized in that it further comprises:

[0036] - a spring fitted around the threaded rod between the second end of the barrel and the tightening / loosening mechanism, and

[0037] - a secondary barrel disposed around the spring between the second end of the barrel and the tightening / loosening method.

[0038] Thanks to such an installation, the clamping force is guaranteed.

[0039] Advantageously, the spring is a compression spring and the length of the spring at rest is greater than the length of the secondary barrel. Brief description of the drawings

[0040] The features of the invention mentioned above, as well as others, will become clearer upon reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which:

[0041] [Fig-1] is a perspective view of a smooth, extendable rail according to a first mode of realization of the invention,

[0042] [Fig.2] is an enlargement of one end of the extendable rail according to the first method of embodiment of the invention,

[0043] [Fig.3] is a cross-sectional view along an axial plane of the end shown in [Fig.2],

[0044] [Fig.4] is a side view of a post according to a first embodiment of the invention,

[0045] [Fig.5] is a cross-sectional view along an axial plane of the post of [Fig.4], and

[0046] [Fig.6] is an enlargement of one end of the post of [Fig.5].

[0047] DETAILED STATEMENT OF IMPROVEMENTS

[0048] Figures 1 to 3 show a protection system according to a first embodiment of the invention, and Figures 4 to 6 show a protection system according to a second embodiment of the invention. The first embodiment relates to an extendable rail 100, and the second embodiment relates to a post 200.

[0049] Figure 1 shows a rail 100 according to the invention, which can be used horizontally or vertically and then takes the form of a vertical prop. In the horizontal position, the rail 100 is positioned between two walls, and in the vertical position, the rail 100 is positioned between a floor and a ceiling. Generally, the rail 100 is positioned between two surfaces.

[0050] The rail 100 comprises a shaft 102 which carries at a first end 102a, a first shoe 104 and at a second end 102b, a passage 106 coaxial to a longitudinal axis of the shaft 102. The first shoe 104 is intended to bear against a surface and it comprises hooking means 104a ensuring hooking to the surface.

[0051] In the embodiment of the invention presented here, the attachment means 104a take the form of lugs 104a which grip the surface. The attachment means 104a may also take the form of a nipple, as in the prior art.

[0052] The rail 100 also includes a slide 108 with a first end mounted to slide in the barrel 102 through the passage 106 and a second end 108a having a bore 110 coaxial with the longitudinal axis of the barrel 102. The slide 108 is thus free to move in translation in the barrel 102 to adapt the length of the rail 100 to the gap between the two surfaces.

[0053] Fig. 2 and Fig. 3 show an enlargement at the second end 108a of the slide 108.

[0054] To block the slide 108, the rail 100 also includes a locking means 112 which has a locking position in which the locking means 112 blocks the slide 108 relative to the barrel 102 and a free position in which the locking means 112 leaves the slide 108 free relative to the barrel 102.

[0055] The rail 100 comprises a threaded rod 114, one end of which is inserted into the bore 110, and the other end of which carries a second shoe 116 intended to bear against another surface and which also comprises attachment means 116a ensuring attachment to the surface. The attachment means 116a of the second shoe 116 may have the same form as those of the first shoe 104.

[0056] The smooth 100 also includes a nut 118 screwed onto the threaded rod 114. The nut 118 is disposed between the bore 110 and the second shoe 116 and the rotation of the nut 118 allows the positioning of the second shoe 116 to be adjusted by ensuring the movement of the threaded rod 114 relative to the second end 108a of the slide 108.

[0057] To allow optimized clamping of the rail 100 between the two surfaces, the rail 100 also includes a spring 150 which is fitted around the threaded rod 114 between the nut 118 and the second end 108a of the slide 108. The spring 150 is here a compression spring which is arranged to move the nut 118 away from the second end 108a of the slide 108.

[0058] The rail also includes a secondary barrel 152 which is arranged around the spring 150 between the nut 118 and the second end 108a of the slide 108.

[0059] The length of the spring 150 at rest, that is to say when no external force is compressing it, is greater than the length of the secondary barrel 152.

[0060] The operation of the smooth 100 according to the invention is then as follows:

[0061] The nut 118 is loosened so as to leave a free space 154 between the barrel secondary 152 and the second end 108a of the slide 108.

[0062] The locking means 112 is placed in a free position so as to extend the slide 108 so that the shoes 104 and 116 bear against the surfaces and the hooking means 104a and 116a cooperate with the surfaces to hook onto them. The locking means 112 is then placed in a locked position to secure the position of the slide 108.

[0063] The nut 118 is then tightened so as to make the threaded rod 114 come out.

[0064] When the pressure exerted against the surfaces becomes greater than that generated by the spring 150, the continued tightening of the nut 118 tends to bring the nut 118 closer to the second end 108a of the slide 108 by crushing the spring 150 and bringing the secondary barrel 152 closer to the second end 108a of the slide 108, the free space 154 gradually disappears.

[0065] When the free space 154 has completely disappeared, the desired clamping force is reached.

[0066] Spring 150 is calibrated according to the desired clamping force.

[0067] As shown more precisely in [Fig.3], the secondary shaft 152 is here integral of a washer 152a which is supported against the nut 118 and which can also be integral with the nut 118. The free space 154 is then between the secondary barrel 152 and the second end 108a of the slide 108.

[0068] But a different arrangement is possible.

[0069] For example, it is possible to secure the secondary barrel 152 with the second end 108a of the slide 108 and to leave it free with respect to the nut 118. The free space will then be between the secondary barrel 152 and the nut 118.

[0070] For example, it is possible to leave the secondary barrel 152 free, and the free space can be distributed, on the one hand, between the secondary barrel 152 and the nut 118, and, on the other hand, between the secondary barrel 152 and the second end 108a of the slide 108.

[0071] As shown in [Fig.3], the threaded rod 114 is held in the bore 110 by a retaining nut 114a screwed onto the threaded rod 114 inside the slide 108.

[0072] In an embodiment not shown, the locking means takes the form of a pin mounted movably in translation on the barrel 102 and which is inserted into a bore through the slide 108 to lock the latter.

[0073] In the embodiment of the invention shown in [Fig. 1], the locking means 112 takes the form of a clamping vise comprising two jaws which are mounted to slide transversely relative to the barrel 102 and which are actuated by a handle 112a between a clamped position in which the jaws clamp the slide 108 through the barrel 102 and lock it and a loosened position in which the jaws do not clamp the slide 108 and leave it free.

[0074] In the embodiment of the invention presented here, the nut 118 takes the form of a wing nut with two ears 118a attached to the nut 118, which helps to handle the nut 118.

[0075] To absorb parallelism defects, the first shoe 104 is fixed to the shaft 102 via a ball joint and / or the second shoe 116 is fixed to the threaded rod 114 via a ball joint.

[0076] Figures 4 and 5 show a post 200 according to the invention, which can be used vertically or horizontally. In the vertical position, the post 200 is placed along a floor or staircase, and in the horizontal position, the post 200 is placed along a wall. Generally, the post 200 is positioned between two surfaces of the same building element. When several posts 200 are fixed, a handrail can be attached between them.

[0077] The post 200 has a shaft 202 which has at a first end 202a, a first shoe 204 and a passage 206, and at a second end 202b, a bore 210. The passage 206 and the bore 210 are coaxial to a longitudinal axis of the shaft 202. The first shoe 204 is intended to bear against a surface, in particular a top surface of an element such as a floor.

[0078] The post 200 also includes a slide 208 with a first end 208b carrying a second shoe 216 which is intended to bear against another surface, in particular a lower surface of an element such as a floor.

[0079] The slide 208 also has a second end 208a which is mounted to slide in the barrel 202 through the passage 206 and which carries a nut 218.

[0080] The post 200 also includes a threaded rod 214 which is arranged in the shaft 202 and the slide 208 so that a first end of the threaded rod 214 exits through bore 210, and a second end of the threaded rod 214 is screwed into nut 218.

[0081] The post 200 also includes a tightening / loosening means 212 attached to the first end of the threaded rod 214, that is, the end outside the shaft 202 at the level of the second end 202b. The tightening / loosening means 212 here takes the form of a crank attached to the threaded rod 214.

[0082] Thus, when the tightening / loosening means 212 is rotated, the threaded rod 214 rotates around its axis and engages with the nut 218. Since the slide 208 is rotationally blocked within the barrel 202, the rotation of the threaded rod 214 causes a translational movement of the slide 208 and therefore of the second shoe 216. Depending on the direction of rotation, the second shoe 216 will move closer to the first shoe 204 so that the shoes 204 and 216 tighten against the surfaces to secure the post 200, or the second shoe 216 will move away from the first shoe 204 so that the shoes 204 and 216 loosen from the surfaces to remove the post 200. The rotational blocking of the slide 208 relative to the barrel 202 is achieved by any suitable means, such as, for example, forms prismatic.

[0083] Fig. 6 shows an enlargement at the level of the second end 202b of the shaft 202.

[0084] To allow optimized tightening of the two shoes 204 and 216, the post 200 also includes a spring 250 which is fitted around the threaded rod 214 between the second end 202b of the shaft 202 and the tightening-loosening means 212, i.e. here outside the shaft 202 at the level of the first end of the threaded rod 214. The spring 250 is here a compression spring which is arranged to separate the second end 202b of the shaft 202 and the tightening-loosening means 212.

[0085] The post 200 also includes a secondary shaft 252 which is arranged around the spring 250 between the second end 202b of the shaft 202 and the tightening-loosening means 212.

[0086] The length of the spring 250 at rest, that is to say when no external force is compressing it, is greater than the length of the secondary barrel 252.

[0087] The operation of post 200 according to the invention is then as follows:

[0088] The shoes 204 and 216 are arranged on either side of the element to be clamped, and the clamping-loosening means 212 is actuated to rotate the threaded rod 214 in the direction of clamping the shoes 204 and 216.

[0089] As long as the desired clamping force is not reached, there remains a free space 254 between the secondary barrel 252 and the second end 202b of the barrel 202 or the clamping-loosening means 212.

[0090] The more the tightening-loosening means 212 is actuated, the more the shoes 204 and 216 tighten, and when the pressure exerted on the surfaces becomes greater than that generated by the spring 250, the continued tightening tends to bring the tightening-loosening means 212 closer to the second end 202b of the barrel 202 by crushing the spring 250 and the free space 254 gradually disappears.

[0091] When the free space 254 has completely disappeared, the desired clamping force is achieved.

[0092] Spring 250 is calibrated according to the desired clamping force.

[0093] As shown more precisely in [Fig.6], the secondary shaft 252 is here integral of a washer 252a which is supported against the second end 202b of the barrel 202 and which can also be fixed to the second end 202b of the barrel 202. The free space 254 is then between the secondary barrel 252 and the tightening-loosening means 212.

[0094] But a different arrangement is possible.

[0095] For example, it is possible to secure the secondary barrel 252 with the clamping-loosening means 212 and leave it free with respect to the barrel 202. The free space will then be between the secondary barrel 152 and the barrel 202.

[0096] For example, it is possible to leave the secondary barrel 252 free, and the free space can be distributed, on the one hand, between the secondary barrel 252 and the second end 202b of the barrel 202, and, on the other hand, between the secondary barrel 252 and the clamping-unclamping means 212.

Claims

Demands

1. A rail (100) comprising: - a shaft (102) having at a first end (102a) a first shoe (104) and at a second end (102b) a passage (106), - a slide (108) having a first end mounted to slide within the shaft (102) through the passage (106) and a second end (108a) having a bore (110), - a locking means (112) arranged to alternately lock the slide (108) relative to the shaft (102) or allow the slide (108) to move freely relative to the shaft (102), - a threaded rod (114) having a first end inserted in the bore (110) and a second end carrying a second shoe (116), and - a nut (118) screwed onto the threaded rod (114), the rail (100) being characterized in that it comprises in addition: - a spring (150) fitted around the threaded rod (114) between the nut (118) and the second end (108a) of the slide (108),and - a secondary barrel (152) disposed around the spring (150) between the nut (118) and the second end (108a) of the slide (108).

2. Smooth (100) according to claim 1, characterized in that the first shoe (104) is fixed to the shaft (102) via a ball joint.

3. Smooth (100) according to any one of claims 1 or 2, characterized in that the second shoe (116) is fixed to the threaded rod (114) via a ball joint.

4. Smooth (100) according to any one of claims 1 to 3, characterized in that the nut (118) takes the form of a butterfly nut.

5. Smooth (100) according to any one of claims 1 to 4, characterized in that the spring (150, 250) is a compression spring and in that the length of the spring (150, 250) at rest is greater than the length of the secondary barrel (152, 252).

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