JP6082238B2 - Rail direction changer for fall prevention device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a direction changer for a rail for a fall prevention device used for preventing a fall of an operator in a high place work such as a transmission line tower.

  When working at high places such as power transmission towers, a safety device is attached to the rails for fall prevention devices attached along the steel tower to prevent accidents from falling, and a safety belt attached by the worker to the safety device is roped. The operator moves by connecting. Such fall prevention device rails generally include an up-and-down movement rail (up-and-down rail) and a horizontal movement rail (horizontal rail), and a turner is provided at the connection point of the up-and-down rail and the horizontal rail. The direction changer called is installed (refer patent document 1, 2).

  The direction changer is a device for switching the traveling direction of the safety device at the time of moving up / down → horizontal and horizontal → up / down. As a direction changer, it has a circular container-shaped main body and a rotating rail that rotates in the main body, and the shaft portion of the rotating rail is inserted into the bearing portion of the main body, and the rotating rail is rotatably supported by the main body. Are known (see paragraph [0003] in Patent Document 1 and FIG. 6; see paragraph [0050] and FIG. 10 in Patent Document 2). And when transferring the safety device between the lifting rail and the horizontal rail, in the direction changer installed at the rail connection point, in the direction of the lifting rail or the horizontal rail before the transfer After turning the rotating rail and moving the safety device to the rotating rail, the rotating rail is rotated, and the safety device is transferred to the horizontal rail or the lifting rail to be transferred.

Japanese Utility Model Publication No. 7-39854 Japanese Patent Laid-Open No. 2002-95763

  In the conventional direction changer having a structure in which the shaft portion of the rotating rail is pivotally supported by the bearing portion of the main body, lubricity is ensured by applying a lubricant to the bearing portion. However, since the direction changer is used for a long period of time in an outdoor environment exposed to sunlight (ultraviolet rays) or wind and rain, the lubricant is weathered, and dust and the like are placed between the shaft portion and the bearing portion. Accumulation may cause a problem that the rotating operation of the rotating rail becomes heavy. Therefore, when the lubricant is weathered, it is necessary to disassemble the direction changer and reapply the lubricant to the bearing portion.

  In particular, in harsh environments such as salt damage areas and industrial zones, corrosion products (rust) are likely to be generated in the shaft part and bearing part, which accumulates between the shaft part and the bearing part. This may cause a problem that the rotating operation of the rotating rail becomes impossible due to the fixed part. In addition, the rotating rail may be made of stainless steel (eg, SCS13), the body may be made of aluminum alloy (eg, AC7A), and if the shaft and bearing are made of dissimilar metals, In such an environment, electrolytic corrosion occurs between the shaft portion and the bearing portion, and a problem that the shaft portion and the bearing portion are fixed easily occurs.

  Therefore, there is a need for a direction changer that can suppress the rotation failure of the rotating rail over a long period of time.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a rail changer for a fall prevention device that can maintain a good rotating operation of the rotating rail over a long period of time. There is.

  Conventionally, the direction changer of the rail for the fall prevention device is used in the outdoor environment for a long period of time, so generally metals such as iron and non-ferrous metals are used from the viewpoint of mechanical strength and stability. The use of resin was not actively considered. As a result of earnest research, the inventors changed the lubricant in the direction changer of the rail for the fall prevention device, and inserted a cylindrical collar having a surface formed of a lubricating resin into the bearing portion. Obtaining knowledge that rotation failure of the rotating rail can be suppressed over a long period of time, the present invention has been completed.

  The rail changer for a fall prevention device according to the present invention includes a container-like main body installed at a connection point between a lifting rail and a horizontal rail, and a rotating rail that rotates within the main body. Further, a shaft portion provided on one of the main body and the rotating rail and a bearing portion provided on the other of the main body and the rotating rail and supporting the shaft portion are provided. Furthermore, the direction changer of the rail for a fall prevention device includes a cylindrical collar interposed between the shaft portion and the bearing portion. This collar has at least a surface formed of a lubricating resin.

  According to the direction changer of the present invention, since the collar having the surface formed of the lubricating resin is interposed in the bearing portion, the rotation failure of the rotating rail can be suppressed without using the lubricant, and the rotating rail It is possible to suppress problems such as a heavy rotation operation. In addition, since a collar having a surface formed of resin is interposed between the shaft portion and the bearing portion, it is possible to prevent corrosion such as electrolytic corrosion from occurring between the shaft portion and the bearing portion. The problem that the part and the bearing part stick together can also be suppressed. Therefore, the rotation operation of the rotating rail can be maintained in a good state for a long time. The horizontal rail here is not strictly limited to the rail attached along the horizontal direction, but is a rail attached to move in a direction intersecting the lifting rail. is there.

  As a lubricating resin, it is preferable to have lubricity (slidability) as well as excellent wear resistance. For example, polyamide (PA) resin represented by nylon, polyethylene terephthalate (PTFE) Fluorine resin, polyacetal (POM), ultra high molecular weight polyethylene (UHMWPE), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), and the like can be suitably used. In order to improve mechanical strength such as wear resistance and impact resistance, it is also possible to add glass fiber or carbon fiber to the resin.

  In the direction changer of the rail for a fall prevention device of the present invention, the collar has a form having a metal base portion made of metal and a resin layer coated with a lubricating resin on the surface thereof.

  The collar may be formed of only the above-described lubricating resin, but there is a concern that the resin alone may cause breakage such as cracking due to insufficient mechanical strength. In the direction changer, when an operator falls, an impact load may be instantaneously applied to the shaft portion and the bearing portion, and mechanical strength that can withstand such an impact load is required. Therefore, both the mechanical strength and the lubricity can be achieved by forming the base portion of the collar with a metal generally having a higher mechanical strength than the resin and coating the surface with a lubricating resin.

  The thickness of the resin layer is, for example, 250 μm or more and 550 μm or less. When the thickness of the resin layer is 250 μm or more, it is easy to maintain lubricity over a long period of time, and when the thickness of the resin layer is 550 μm or less, the metal base becomes thin as the resin layer becomes thicker. Therefore, it is possible to suppress a decrease in mechanical strength.

  The metal base is excellent in mechanical strength such as tensile strength, and is preferably formed of an inexpensive metal. For example, ferrous metals such as stainless steel, carbon steel, nickel chrome steel, Al-Si alloys, Magnesium alloys such as aluminum alloys such as Al-Mg alloys and Al-Si-Mg alloys, and Mg-Al-Zn alloys (AZ-based alloys (eg, AZ91) in the ASTM standard) can be suitably used. If it is a ferrous metal, sufficient mechanical strength can be secured. If it is an aluminum alloy or a magnesium alloy, weight reduction can be achieved compared with a ferrous metal.

  In the direction changer for the rail for the fall prevention device of the present invention, a form in which the metal base is an iron-based metal can be mentioned.

  If the metal base is an iron-based metal, the adhesiveness of a lubricating resin (eg, nylon) coated on the surface is better than that of an aluminum alloy. Specific examples of ferrous metals include general structural rolled steel (eg, SS400) defined in JIS G 3101 (2010).

  In the direction changer of the rail for a fall prevention device of the present invention, a mode in which the lubricating resin is nylon is exemplified.

  The lubricating resin is preferably excellent in wear resistance, impact resistance, weather resistance, chemical resistance, rust prevention, and quietness. Examples of the lubricating resin having such characteristics include nylon. Specifically, nylon 6 (abbreviation: PA6), nylon 11 (abbreviation: PA11), nylon 12 (abbreviation: PA12), nylon 66 (abbreviation) : PA66). Among them, nylon 11 and nylon 12 have low water absorption and are excellent in seawater resistance and cold shock resistance. In particular, nylon 11 has good slidability with respect to steel, and has a smooth finished surface when coated on the surface of a metal base formed of metal (eg, iron-based metal).

  As a method for coating the metal base with nylon, for example, a known technique such as powder coating can be used. Specifically, after the powdery nylon is attached to the metal base, the surface of the metal base can be coated with nylon by baking.

  In the direction changer of the rail for a fall prevention device of the present invention, the collar has a form having a ridge at the end on the side where the shaft portion is inserted.

  When the collar has a ridge, foreign matter such as dust can be prevented from entering between the shaft portion and the bearing portion (collar). Moreover, the contact resistance between the rotating rail and the main body can be reduced by interposing a collar collar having a surface formed of resin between the rotating rail and the main body.

  The direction changer of the rail for fall prevention device of the present invention is in a state in which the rotation operation of the rotating rail is good for a long period of time because the collar having the surface formed of the lubricating resin is interposed in the bearing portion. Can be maintained.

It is a schematic plan view which shows the direction changer of the rail for fall prevention apparatuses which concerns on Embodiment 1 of this invention. It is a schematic side view which shows the direction changer of the rail for fall prevention apparatuses which concerns on Embodiment 1 of this invention. It is a general | schematic partial side sectional view of the direction changer of the rail for fall prevention apparatuses shown in FIG. It is a figure which shows an example of a color | collar, (A) is a schematic plan view, (B) is a schematic side view. It is the schematic which shows another example of a color, (A) is a schematic plan view, (B) is a schematic side view.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same code | symbol shows the same or an equivalent part.

(Embodiment 1)
With reference to FIGS. 1-4, the direction changer of the rail for fall prevention apparatuses which concerns on Embodiment 1 is demonstrated. The anti-falling device rail direction changer 100 includes a circular container-shaped main body 10 installed at a connection point between the lifting rail 210 and the horizontal rail 220, and a rotating rail 30 that rotates within the main body 10. The rotating rail 30 is provided with a shaft portion 31, and the main body 10 is provided with a bearing portion 11 (see FIGS. 2 and 3) that supports the shaft portion 31. One of the features of the rail changer 100 for the fall prevention device is that it includes a cylindrical collar 50 interposed between the shaft portion 31 and the bearing portion 11, and at least the surface of the collar 50 is lubricated. It is in the point formed with a conductive resin. Hereinafter, each member will be described in detail.

  As shown in FIGS. 1 to 3, the main body 10 has a substantially disc-shaped bottom plate base 15 and a cylindrical frame-shaped outer peripheral wall portion 16 standing along the outer peripheral edge of the bottom plate base 15. A bearing portion 11 penetrating inward and outward is provided at the center of 15. The bottom plate base portion 15 and the outer peripheral wall portion 16 are integrally formed. Further, the main body 10 has an elevating rail receiving portion 21 to which the elevating rail 210 is connected and a horizontal rail receiving portion 22 to which the horizontal rail 220 is connected so as to extend radially outward from the outer peripheral wall portion 16. And have. Rails 210 and 220 are connected to the rail receiving portions 21 and 22 by bolts 23. Openings 16o are provided at locations corresponding to the rail receiving portions 21 and 22 in the outer peripheral wall portion 16 of the main body 10, respectively.

  In this example, as shown in FIG. 1, the main body 10 has two lifting rail receiving portions 21 in the substantially vertical direction and two horizontal rail receiving portions 22 in the substantially horizontal direction. 21 and the horizontal rail receiving portion 22 are extended from the main body 10 in a cross direction (vertical and horizontal directions in FIG. 1) so as to be substantially orthogonal. The direction changer 100 (main body 10) is installed at a cross-cross connection point between the lifting rail 210 and the horizontal rail 220.

  The main body 10 is formed of an aluminum alloy (specifically, AC7A defined in “aluminum alloy casting” of JIS H 5202 (2010)).

  As shown in FIGS. 1 to 3, the rotating rail 30 is a short rail, has a support portion 32 for attachment to the main body 10, and is provided with a shaft portion 31 that protrudes from the bottom surface of the support portion 32. The rotating rail 30 has a shaft portion 31 inserted into the bearing portion 11 of the main body 10 via a collar 50, and is rotatably supported in the main body 10 (see FIGS. 2 and 3). Further, a plate-like inner plate base 35 that is in sliding contact with the inner surface of the bottom plate base 15 of the main body 10 and rotates integrally with the rotary rail 30 is fixed to the support portion 32 of the rotary rail 30. On the outer peripheral edge of the inner plate base portion 35, an inner peripheral wall portion 36 is erected in an arc shape along the inner surface of the outer peripheral wall portion 16 of the main body 10. This inner peripheral wall portion 36 is located inside the opening 16o of the outer peripheral wall portion 16 corresponding to the other rail receiving portion when the rotating rail 30 is directed to one rail receiving portion of the rail receiving portions 21 and 22 of the main body 10. It is provided so that it may be located in. The inner plate base portion 35 and the inner peripheral wall portion 36 are integrally formed.

  In FIG. 1, the rotary rail 30 is directed to the horizontal rail receiving portion 22, and the inner peripheral wall portion 36 is located inside the opening 16 o of the outer peripheral wall portion 16 corresponding to the lifting rail receiving portion 21. . Although not shown, when the rotating rail 30 is rotated 90 ° in the direction of the white arrow in FIG. 1 and is directed to the lifting rail receiving portion 21, the inner plate base 35 is also rotated together with the rotating rail 30, and the inner peripheral wall portion 36 is horizontal. It is located inside the opening 16o of the outer peripheral wall portion 16 corresponding to the rail receiving portion 22 for use.

  Further, the shaft portion 31 has a length such that the tip portion protrudes from the outer surface of the bottom plate base portion 15 of the main body 10 when inserted into the bearing portion 11 of the main body 10, and a nut 41 is provided at the tip portion of the shaft portion 31. A screw groove to be screwed is provided. Then, the rotating rail 30 is mounted in the main body 10 by screwing the nut 41 with a plain washer and a corrugated washer between the bottom plate base 15 and the nut 41. In addition, a through hole is provided at the distal end portion of the shaft portion 31 in the direction orthogonal to the axial direction on the distal end side from the position where the nut 41 is screwed. In order to prevent the nut 41 from coming off in this through hole. The retaining pin 42 is inserted.

  Since the rotating rail 30 has the shaft portion 31, it is formed of stainless steel having excellent mechanical strength (specifically, SCS13 defined in “Stainless Steel Cast Steel Product” of JIS G 5121 (2003)). .

  The collar 50 is a cylindrical member and is fitted into the bearing portion 11 of the main body 10 as shown in FIG. Further, at least the surface of the collar 50 (the inner peripheral surface that contacts the shaft portion 31 of the rotating rail 30 and the outer peripheral surface that contacts the bearing portion 11 of the main body 10) is formed of a lubricating resin.

  In this example, the collar 50 has a metal base portion made of metal and a resin layer whose surface is coated with a lubricating resin. Specifically, a metal base is formed of steel that is an iron-based metal (specifically, SS400 defined in “rolled steel for general structures” of JIS G 3101 (2010)), and nylon 11 is formed on the surface thereof. It is coated. The thickness of the resin layer is about 400 μm.

  Further, in this example, the collar 50 has a shape having a collar 51 at the end on the side where the shaft 31 of the rotating rail 30 is inserted, as shown in FIG. 50a. Since the collar 50 has a flange, it is possible to prevent foreign matters such as sand from entering between the shaft portion 31 and the collar 50 and between the bearing portion 11 and the collar 50, and the rotating rail 30 (support portion 32) and the main body 10 ( Corrosion such as electric corrosion between the rotating rail 30 and the main body 10 and contact resistance can be reduced by the presence of soot between the base plate base portion 15).

  With reference to FIG. 1, the usage method of the direction change device 100 of the rail for fall prevention apparatuses which concerns on Embodiment 1 is demonstrated. For example, when the worker moves from the horizontal rail 220 to the lifting rail 210, as shown in FIG. 1, the rotating rail 30 is directed to the horizontal rail receiving portion 22, and the rotating rail 30 is connected to the horizontal rail 220. A safety device (not shown) is transferred from the horizontal rail 220 to the rotating rail 30. At this time, since the opening 16o is provided in the outer peripheral wall 16 of the main body 10, the safety device can be transferred to the rotating rail 30 in the main body 10 through the opening 16o. Next, the rotating rail 30 is rotated and directed to the lifting rail receiving portion 21, the rotating rail 30 is connected to the lifting rail 210, and the safety device is transferred from the rotating rail 30 to the lifting rail 210. The traveling direction can be switched. At this time, the inner plate base 35 is also rotated together with the rotating rail 30, and the inner peripheral wall 36 is located inside the opening 16o of the outer peripheral wall 16 corresponding to the horizontal rail receiving portion 22. The horizontal rail 220 is cut off. Therefore, an accident in which the safety device is detached from the rail can be prevented by accidentally entering the main body 10 through the opening 16o from the horizontal rail 220 that is not connected to the rotating rail 30 by another operator's safety device. Since the same applies when the worker moves from the lifting rail 210 to the horizontal rail 220, the description is omitted.

The following tests were conducted and evaluated for the collar having the resin coated on the surface of the metal base as described in the first embodiment.
1. Adhesion test Salt spray / wear test (combined cycle test)
3. 3. Weather resistance test Thermal test

<1. Adhesion test>
In the adhesion test, the surface condition of the coated resin was examined when the surface of the collar was hit with a hammer. This test was carried out using a hammer test apparatus in accordance with the adhesion test method (hammer test) defined in “Testing method of hot dip galvanizing” in JIS H 0401 (2007). Also, the collar was fixed horizontally so that the hammer dents were parallel to the axial direction of the collar, and hitting was performed at 5 points in parallel at intervals of 4 mm. However, this test was performed using a wrinkle-less collar 50b having a shape having no wrinkles as shown in FIG.

  As a result, in the coated resin, no continuous lifting or peeling was observed between the dents, and the adhesion of the resin was good.

<2. Salt spray / wear test (combined cycle test)>
In the salt spray / wear test, a combined cycle test with one cycle of the salt spray test and the rotary wear test was repeated 10 times on the direction changer with the collar fitted in the bearing, and then the amount of wear on the collar was determined. It was measured. In the salt spray test, salt water was sprayed at 35 ° C. for 100 hours and then dried at room temperature for 68 hours. In the rotational wear test, after the salt spray test, the rotating operation of rotating the rotating rail by 90 ° was performed 500 times. However, this test is also described in <1. In the same manner as in the adhesion test>, the wrinkle-free collar having a shape without wrinkles was used.

  As a result, there was no change in the outer diameter and inner diameter of the collar before and after the test, and no abrasion was observed in the coated resin, and the abrasion resistance of the resin was good. In addition, when the surface of the collar was confirmed with the naked eye and the touch, no defects such as scratches or cracks harmful to the coated resin were confirmed.

<3. Weather resistance test>
In the weather resistance test, using a sunshine weather meter (WEL-SUN-DC-B type manufactured by Suga Test Instruments Co., Ltd.) for a single color, repeated irradiation for 48 minutes, irradiation for 12 minutes, and water spraying The test was performed for 60 hours, and 60 hours was one cycle. After 17 cycles, the deterioration of the coated resin was confirmed. However, this test is also described in <1. In the same manner as in the adhesion test>, the wrinkle-free collar having a shape without wrinkles was used.

  As a result, no deterioration or abnormality was observed in the coated resin, and the weather resistance of the resin was good. Also, no defects such as harmful scratches and cracks were found.

<4. Cold test>
In the thermal test, the deterioration of the coated resin was confirmed after holding the collar alone at −20 ° C. and + 60 ° C. for 100 hours in a thermostat. However, this test was carried out using a collar 50a with a hook having a shape as shown in FIG.

  As a result, in the color after 100 hours at −20 ° C. and the color after 100 hours at + 60 ° C., there is no appearance of swelling or abnormality in the coated resin, and thermal factors (low / high temperature) ) Degradation was not confirmed. Further, the color after 100 hours at −20 ° C. and the color after 100 hours at + 60 ° C. are described above in <2. As a result of conducting a hammer test in the same manner as in the adhesion test, no continuous lifting or peeling was observed between the dents in the coated resin.

Furthermore, the following test was implemented and evaluated about the direction changer of the rail for fall prevention apparatuses which inserted the color | collar in the bearing part which concerns on this invention which was demonstrated in Embodiment 1. FIG.
5. 5. Salt spray test 6. Outdoor exposure test Impact load strength test

<5. Salt spray test>
In the salt spray test, a direction changer of the present invention in which a collar was fitted into the bearing part and a conventional direction changer in which a lubricant was applied to the bearing part were prepared. In addition, the collar with the shape of the shape which has a ridge was used for the color. Then, with respect to the direction changer of the present invention and the conventional direction changer, 24 hours of salt spray and 24 hours of drying are defined as one cycle, and this is repeated 21 cycles (about 1000 hours). The rotating operability of each rotating rail of the direction changer and the conventional direction changer was evaluated. Further, before and after the test, the respective rotational torques were measured when the rotating rail was moved up and down → horizontally and when the rotating rail was turned up and down horizontally.

  As a result, with the conventional direction changer, the rotational operability deteriorated and the rotational operation by hand was impossible. The cause of the rotation failure was adhesion due to corrosion between the shaft portion and the bearing portion. On the other hand, in the direction changer of the present invention, there was no change in the rotational operability before and after the test, the rotational operability was good, and no sticking due to corrosion between the shaft portion and the bearing portion was observed. In addition, in the conventional direction changer, when rotating up / down horizontally before the test and when rotating horizontally / up / down, the rotational torque was 0.47 N · m and 0.70 N · m, respectively. After the test, the rotational torques were 45.6 N · m and 24.4 N · m, respectively. On the other hand, in the direction changer of the present invention, the rotational torques when rotating up and down and horizontally rotating before and after the test were 0.56 N · m and 0.61 N · m, respectively. On the other hand, after the test, the respective rotational torques were 0.93 N · m and 0.83 N · m. That is, in the conventional direction changer, the rotation operation becomes significantly heavy, whereas in the direction changer of the present invention, it can be seen that the rotation operation can be maintained in a good state.

<6. Outdoor exposure test>
In the outdoor exposure test, the direction changer of the present invention in which a collar is fitted in the bearing part and the conventional direction changer in which a lubricant is applied to the bearing part are respectively provided in an exposure test site with severe natural environment such as salt damage, wind and rain, and ultraviolet rays. Two units were installed, and the presence or absence of corrosion between the shaft portion and the bearing portion over time and the occurrence of rotation failure were examined. In addition, the collar with the shape of the shape which has a ridge was used for the color.

  The situation after about 1 year was confirmed for each direction changer. As a result, in the conventional direction changer, the rotational operability is remarkably deteriorated. Specifically, in one unit, the shaft portion and the bearing portion were completely fixed due to corrosion, and the rotation operation was impossible. In the other unit, corrosion products were generated between the shaft and the bearing, and they were not completely fixed, but they could not be rotated with one hand, and both hands could be hindered. The rotation operation became significantly heavy. On the other hand, in both of the direction changers of the present invention, there is no change in the rotational operability before and after the test, the rotational operability is good, and the shaft portion and the bearing portion are also stuck due to corrosion. There wasn't. In other words, it can be seen that the direction changer of the present invention can maintain a good rotation operation for a long time even in a severe environment.

<7. Impact load strength test>
In the impact load strength test, the direction changer of the present invention with a collar fitted to the bearing is installed at the rail connection, a safety device is attached to the center of the rotating rail, and an 85 kg sandbag is attached to the safety device (with a rope ( After connecting the sandbags with a length of 700 mm), the condition of the collar was confirmed. Also, in this test, after dropping the sandbag from a position about 700 mm higher than the rotating rail with the rotating rail in a vertical state (with the rotating rail facing the lifting rail receiving part), the rotating rail was then removed. The sandbag was dropped from approximately the same height as the rotating rail in a horizontal state (with the rotating rail facing the horizontal rail receiving portion). In addition, the collar with the shape of the shape which has a ridge was used for the color.

  As a result, the collar was not damaged such as cracks and had sufficient mechanical strength.

  In addition, this invention is not limited to embodiment mentioned above, It can change suitably in the range which does not deviate from the summary of this invention. For example, the materials for forming the rotating rail and the main body, and the metal base and the resin layer of the collar may be appropriately changed, or the rotating rail and the main body may be formed of the same metal. Moreover, in Embodiment 1 mentioned above, although the axial part was provided in the rotating rail and the bearing part was provided in the main body, you may provide an axial part in a main body and provide a bearing part in a rotating rail. Further, in the first embodiment described above, as shown in FIG. 1, there are two lifting rail receiving portions 21 and two horizontal rail receiving portions 22, and these rail receiving portions 21 and 22 are provided in a cross direction. The direction changer 100 installed at the cross-cross connection point between the lifting rail 210 and the horizontal rail 220 has been described as an example. In addition, there is one lifting rail receiving portion and one horizontal rail receiving portion, these rail receiving portions are provided in the L-shaped direction, and are installed at the corner connection points between the lifting rail and the horizontal rail. It can also be applied to a direction changer. Alternatively, one of the elevating rail receiving portion and the horizontal rail receiving portion has one and the other two, and these rail receiving portions are provided in the T-shape, and the elevating rail and the horizontal rail It can also be applied to a direction changer installed at a T-shaped cross-connection point.

100 Rail direction changer for fall prevention device
10 Body
11 Bearing
15 Base plate base 16 Outer wall 16o Opening
21 Lifting rail receiving part 22 Horizontal rail receiving part
23 volts
30 Rotating rail
31 Shaft 32 Support
35 Inner plate base 36 Inner wall
41 Nut 42 Retaining pin
50,50a, 50b color 51 鍔
210 Elevating rail 220 Horizontal rail

Claims (4)

A direction changer for a rail for a fall prevention device comprising a container-like main body installed at a connection point between a lifting rail and a horizontal rail, and a rotating rail rotating in the main body,
A shaft provided on one of the main body and the rotating rail;
A bearing portion that is provided on the other of the main body and the rotating rail and supports the shaft portion;
A cylindrical collar interposed between the shaft portion and the bearing portion;
The collar is a rail turner for an anti-falling device having a metal base formed of metal and a resin layer coated with a lubricating resin on the surface thereof. Wherein the metal base is, redirector of fall protection device for rail according to ferrous metals der Ru請 Motomeko 1. The lubricating resin may 請 Motomeko 1 or redirector of fall protection device for rail according to claim 2 Ru nylon der. The collar redirector of fall protection device for rail according to any one of claims 3 to 請 Motomeko 1 that having a flange at an end portion on the side where the shaft portion is inserted.

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