Anti-fall device

Abstract

To provide a fall prevention tool capable of preventing a suspension wire from falling off even when a clamping metal fitting loosens after being fastened. [Solution] It is attached to a sling Q that is fixed to a suspension wire R via a clamping metal fitting 10. A locking portion 41 that locks to the tip end of the sling Q is provided. A fixing portion 42 that fixes to the base end of the sling Q is provided. The locking portion 41 is locked to the tip end of the sling Q that protrudes from the clamping metal fitting 10. The fixing portion 42 is fixed to the base end of the sling Q. The locking portion 41 and fixing portion 42 are attached simultaneously to the sling Q that is fixed to the clamping metal fitting 10.

Description

[Technical Field]

[0001] The present invention relates to a fall prevention device that prevents a sling or the like fixed to an erection cable or the like with a clamping metal fitting from falling. [Background technology]

[0002] An example of a hanging device that is fixed to an installation cable with a clamping metal fitting is a suspension wire attached to a connection terminal box. When this suspension wire is fixed with a clamping metal fitting, it is installed using a cable installation mounting bracket or the like described in Patent Document 1. That is, this cable installation mounting bracket is configured so that the installation cable R is clamped between the upper recessed portions 11 of a pair of clamping metal fittings 10, and the suspension wire Q attached to the connection terminal box P is clamped between the lower recessed portions 12.

[0003] This clamping fitting 10 is composed of a pair of fittings facing each other with the installation cable R interposed therebetween, and a through-hole 13 that passes through the clamping fitting 10 is drilled between the upper recess 11 and the lower recess 12. A connecting bolt 20 is inserted into the through-hole 13 and fixed with a nut 30, thereby clamping the installation cable R. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-101051 Summary of the Invention [Problem to be solved by the invention]

[0005] When the sling Q is clamped by the conventional clamping metal fitting 10, the installation cable R and the sling Q are fixed in a substantially parallel state (see FIG. 10).

[0006] However, there have been cases where the clamping force of the connecting bolts 20 and nuts 30 that secure the clamping fittings 10 has decreased due to some kind of vibration or impact, causing the suspender Q to fall off the clamping fittings 10.

[0007] Furthermore, even when the clamping fitting 10 is temporarily fastened to the installation cable R, the suspending tool Q is prone to falling off.

[0008] The present invention was created to solve the above-mentioned problems, and aims to provide a fall prevention device that can prevent a hanging device such as a suspension wire from falling off, not only when the clamping fitting is temporarily fastened, but also when the clamping fitting loosens after being tightened. [Means for solving the problem]

[0009] The first means of the present invention for achieving the above-mentioned object is a fall prevention device 40 that prevents a rod-shaped suspender Q fixed to a suspension wire R with a clamping metal fitting 10 from falling off, The clamping fitting 10 has a locking portion 41 that locks onto the tip end side of the sling Q protruding from one end thereof, and a fixing portion 42 that is arranged on the other end side of the clamping fitting 10 and fixes it to the base end side of the sling Q, and the locking portion 41 and fixing portion 42 are simultaneously attached to the sling Q fixed to the clamping fitting 10.

[0010] In the second means, the hanging device Q has an L-shaped portion having a horizontal portion Q1 that is clamped to the clamping metal fitting 10 and a vertical portion Q2 that is bent from the base end side of the horizontal portion Q1, and the engaging portion 41 engages with the upper part of the tip end side of the horizontal portion Q1, and the fixing portion 42 is fixed to the side side of the vertical portion Q2.

[0011] The fall-off prevention device 40 of the third means is formed of a strip-shaped plate, and the locking portion 41 and the fixing portion 42 are formed by notching the side surface of the strip-shaped plate.

[0012] The fall-off prevention device 40 of the fourth means is formed of a strip-shaped plate, and the locking portion 41 and the fixing portion 42 are formed by cutting out the center of the plate surface of the strip-shaped plate along the longitudinal direction.

[0013] The fall-off prevention device 40 of the fifth means is formed of a strip-shaped plate, and the locking portion 41 and the fixing portion 42 are formed by bending the strip-shaped plate at both longitudinal ends.

[0014] The hanger Q of the sixth means is a suspension wire attached to the connection terminal box P. [Effects of the Invention]

[0015] According to the present invention, by simultaneously attaching the locking portion and the fixing portion to the sling fixed to the clamping metal fitting, it is possible to prevent the sling from falling off. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a state in which an embodiment of the present invention is used; [Figure 2] 1 is a perspective view showing an embodiment of the present invention; [Figure 3] 1(a) to 1(d) are perspective views showing the mounting procedure of an embodiment of the present invention. [Figure 4] FIG. 10 is a perspective view showing another embodiment of the present invention. [Figure 5] FIG. 10 is a perspective view showing a state in which another embodiment of the present invention is used. [Figure 6] 10(a) to 10(c) are perspective views showing the mounting procedure of another embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view showing another embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view showing a state in which another embodiment of the present invention is used. [Figure 9] 10(a) to 10(d) are perspective views showing the mounting procedure of another embodiment of the present invention. [Figure 10] FIG. 10 is a perspective view showing a conventional hanging device in an attached state. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be described below with reference to the illustrated example. The present invention is a fall prevention device 40 that prevents a suspending device Q from falling off when the suspending device Q is fixed to a suspension wire R, which is installed on a utility pole, a support, or a pole, via a clamping metal fitting 10 (see FIG. 1).

[0018] Fall-off prevention device 40 is in the shape of a strip having a locking portion 41 and a fixing portion 42. Locking portion 41 is a portion that locks onto the tip end side of the sling tool Q, protruding from one end of clamping metal fitting 10. Fixing portion 42 is located on the other end side of clamping metal fitting 10, and is a portion that fixes onto the base end side of sling tool Q.

[0019] Then, locking portion 41 and fixing portion 42 are simultaneously attached to the sling fixed to clamping metal fitting 10 (see FIG. 1). As a result, when clamping metal fitting 10 moves to the left in the figure, vertical portion Q2 hits fixing portion 42 of fall-off prevention device 40, preventing the sling Q from moving before it falls off.

[0020] The illustrated suspender Q has an L-shaped portion having a horizontal portion Q1 clamped by clamping metal fitting 10 and a vertical portion Q2 bent from the base end side of horizontal portion Q1 (see FIG. 1). This suspender Q may be used for any purpose as long as it has a rod-like configuration that can be fixed to an installation cable R or the like using clamping metal fitting 10, but in the illustrated example, the suspender Q is a suspension wire attached to a connection terminal box P. In this case, a horizontal base end Q3 is formed that continues from the bottom end of vertical portion Q2 to the connection terminal box P.

[0021] Then, the locking portion 41 is locked to the upper part of the tip end of the horizontal portion Q1, and the fixing portion 42 is fixed to the side surface of the vertical portion Q2 (see FIG. 1). The illustrated fall-off prevention device 40 is formed from a strip-shaped plate (see FIG. 2). In this case, the locking portion 41 and the fixing portion 42 are formed as notches on the longitudinal side surfaces of the strip-shaped plate. In the illustrated example, a protrusion 46 is formed on the inner surface of the notch, and the horizontal portion Q1, vertical portion Q2, and horizontal base end portion Q3 are fixed so that they do not come off (see FIG. 1).

[0022] This fall-off prevention device 40 is roughly L-shaped, with a vertical portion forming the locking portion 41 and a horizontal portion forming the fixing portion 42. Furthermore, a second vertical portion is formed by bending vertically from this horizontal portion, and auxiliary locking portions 43, 44 are formed on this second vertical portion. These auxiliary locking portions 43, 44 are selected and used depending on the height of the horizontal base end portion Q3 (see Figure 1). In this embodiment, synthetic resin material can be used in addition to metal material.

[0023] The procedure for attaching this fall prevention device 40 to the sling Q is shown in Figure 3. First, the vertical portion Q2 is passed through the notched fixing portion 42 (see Figure 3(A)). Next, the fall prevention device 40 is pulled to pass the vertical portion Q2 through the fixing portion 42 (see Figure 3(B)). Furthermore, the fall prevention device 40 is rotated to pass the tip end of the horizontal portion Q1 through the locking portion 41, and the vertical portion Q2 is fixed to the fixing portion 42 (see Figure 3(C)). At this time, the horizontal base end Q3 is also passed through the auxiliary locking portion 44. Finally, the fall prevention device 40 is lowered to lock the horizontal portion Q1 into the locking portion 41, fix the vertical portion Q2 to the fixing portion 42, and lock the horizontal base end Q3 into the auxiliary locking portion 44, completing the attachment (see Figure 3(D)).

[0024] According to this embodiment, the suspending tool Q is prevented from falling off when the clamping fitting 10 is temporarily fastened, and no special tools are required for installation. In addition, the suspending tool Q can be installed without being damaged, and it is also possible to retrofit the fall-off prevention device 40 to the suspending tool Q after it has been fixed.

[0025] In another embodiment, the locking portion 41 and the fixing portion 42 can be formed by cutting out the center of the plate surface of the band-shaped plate along the longitudinal direction (see FIG. 4). The illustrated fall-off prevention device 40 has a substantially L-shaped configuration with a vertical portion where the locking portion 41 is formed and a horizontal portion where the fixing portion 42 is formed. A second vertical portion is formed by bending downward from the horizontal portion, and a notched long groove 45 is formed in this second vertical portion, and auxiliary locking portions 43 and 44 are formed along this long groove 45. In the illustrated example, a protrusion 46 is formed on the inner surface of the notch along the longitudinal direction, fixing the horizontal portion Q1, the vertical portion Q2, and the horizontal base end portion Q3 to prevent them from slipping out (see FIG. 5). In this embodiment, a synthetic resin material can be used in addition to a metal material.

[0026] The procedure for attaching this fall prevention device 40 to the sling Q is shown in Figure 6. First, the horizontal base end Q3 of the sling Q is passed through the long groove 45, and the fall prevention device 40 is slid toward the vertical portion Q2 (see Figure 6(A)). Next, the vertical portion Q2 is passed through the notch in which the locking portion 41 is formed, and the vertical portion Q2 is pushed all the way into the fixing portion 42 to fix the fall prevention device 40 (see Figure 6(B)). Finally, with the fall prevention device 40 fixed to the sling Q, the horizontal portion Q1 is clamped and fixed to the clamping metal fitting 10, completing the installation (see Figure 6(C)).

[0027] According to this embodiment, the suspending tool Q is prevented from falling off when the clamping fitting 10 is temporarily fastened, no special tools are required for installation, and the suspending tool Q can be installed without being damaged.

[0028] In another embodiment, the fall-off prevention device 40 may be formed from a band-shaped plate, with the locking portion 41 and the fixing portion 42 bent at both longitudinal ends of the band-shaped plate (see FIG. 7). The illustrated fall-off prevention device 40 has a vertical band-shaped portion extending from one end of a horizontal band-shaped plate with the plate surface upright. The upper end of the vertical band-shaped portion is bent to form the locking portion 41. The other end of the horizontal band-shaped plate is bent to form the fixing portion 42.

[0029] Furthermore, after engaging the locking portion 41 on the tip side of the horizontal portion Q1 and engaging the fixing portion 42 on the side surface of the vertical portion Q2, a tool is used to crimp the locking portion 41 and the fixing portion 42 to fix them to the suspender Q (see Figure 8). In this case, deformation of the suspender Q due to vibration of the installation cable R can be suppressed, and the transmission of vibration to the connection terminal box P can be reduced.

[0030] In the illustrated example, the structure is fixed at two locations, the horizontal portion Q1 and the vertical portion Q2, so the sling Q can be attached even if it is configured with only the horizontal portion Q1 and the vertical portion Q2. Furthermore, since the locking portion 41 and the fixing portion 42 are ultimately configured by caulking with a tool, the use of metal is preferable, but it is also possible to change to a fitting structure using synthetic resin.

[0031] The procedure for attaching this fall prevention device 40 to the sling Q is shown in Figure 9. First, the fixing part 42 is locked onto the vertical part Q2 of the sling Q (see Figure 9(A)). Next, the fall prevention device 40 is rotated to move the fixing part 41 to the top of the horizontal part Q1 (see Figure 9(B)). Furthermore, the fall prevention device 40 is lowered to lock the fixing part 41 onto the horizontal part Q1 (see Figure 9(C)). Finally, a tool is used to crimp the fixing part 41 and the fixing part 42 together, securing them to the sling Q (see Figure 9(D)).

[0032] This embodiment prevents the suspender Q from falling off when the clamping fitting 10 is temporarily fastened. In addition, the suspender Q can be attached without being damaged, and it is also possible to later attach the fall prevention device 40 to the suspender Q after it has been fixed.

[0033] The shape of the present invention and the shapes of each part are not limited to the examples shown in the drawings, and can be freely modified without departing from the spirit of the present invention. Also, any type of sling that is fixed to a cable or the like with a clamping fixture can be prevented from falling. [Explanation of symbols]

[0034] P Connection terminal box Q Lifting equipment Q1 Horizontal part Q2 Vertical section Q3 Horizontal proximal end R Construction cable 10 Clamping metal fittings 20 Connecting bolt 30 nuts 40 Fall prevention device 41 Locking part 42 Fixed part

Claims

1. This is a fall prevention device that prevents a rod-shaped suspension device fixed to a suspension line with a clamping fitting from falling off, and is characterized in that it comprises a locking portion that locks onto the tip end side of the suspension device protruding from one end of the clamping fitting, and a fixing portion that is located on the other end side of the clamping fitting and fixes it to the base end side of the suspension device, and the locking portion and fixing portion are attached simultaneously to the suspension device fixed to the clamping fitting.

2. The anti-fall-off device according to claim 1, wherein the hanging device has an L-shaped portion having a horizontal portion that is clamped to the clamping metal fitting and a vertical portion that is bent from the base end side of the horizontal portion, and the locking portion locks onto the upper part of the tip end side of the horizontal portion, and the fixing portion is fixed to the side side of the vertical portion.

3. 3. The device according to claim 1, wherein the device is formed of a strip-shaped plate, and the engaging portion and the fixing portion are formed by notches on the side surface of the strip-shaped plate.

4. 3. The device according to claim 1, wherein the device is formed of a strip-shaped plate, and the engaging portion and the fixing portion are formed by cutting out a central portion of the surface of the strip-shaped plate along the longitudinal direction.

5. 3. The device according to claim 1, wherein the device is formed of a strip-shaped plate, and the engaging portion and the fixing portion are formed by bending both longitudinal ends of the strip-shaped plate.

6. 3. The device for preventing a fall-off according to claim 1 or 2, wherein the hanger is a suspension wire attached to a connection terminal box.

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