Pulley device

Abstract

To provide a pulley device which can secure a wide operating range for a pulley when a fixed member is attached to a wall surface and can also be attached to a ceiling surface.SOLUTION: A pulley device includes a pulley body in which a sheave is rotatably supported between a pair of left and right side plates, a double shackle in which a pair of upper and lower shackles are connected by a swivel shaft so as to be rotatable relative to one another, and a mounting base to which the shackle is rotatably connected via the swivel shaft to the underside of a fixed plate. The double shackle is connected between the upper parts of the pair of left and right side plates of the pulley body and the shackle of the mounting base so as to be oscillating relative to one another by a connecting bar that passes horizontally through the double shackle. The lower shackle of the double shackle is spaced so as to sandwich the upper parts of the pair of left and right side plates of the pulley body, and the upper shackle is spaced so as to be sandwiched between the shackle of the mounting base.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pulley device that can be attached to either a wall or a ceiling. [Background technology]

[0002] Pulleys have been widely used as a device for redirecting pulling force in another direction for the transportation of cargo, and the structure of the pulley itself is well known. Not only fixed pulleys but also hanging pulleys are well known. Furthermore, swivel pulleys that can rotate the pulling direction of the pulley 360 degrees are also widely used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-165994 Summary of the Invention [Problem to be solved by the invention]

[0004] The structure described in Patent Document 1 is a typical swivel pulley structure, in which a pulley sandwiched between a pair of support brackets and a shackle are connected by a swivel, allowing the pulley to rotate 360 ​​degrees relative to the shackle, thereby changing the towing direction of the load.

[0005] In the pulley device described in Patent Document 1, the pulley can rotate relative to the shackle, but if the shackle is not attached freely and its movement is restricted for some reason, the pulley cannot rotate completely freely. Also, if the shackle is used in a manner such as being suspended by a wire, the shackle itself will swing widely and will lose stability.

[0006] The present invention was developed with an eye on such problems, and aims to provide a pulley device that can ensure a wide operating range for the pulley when the fixing member is attached to a wall surface, and can also be attached to a ceiling surface. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention comprises a pulley body having a sheave rotatably supported between a pair of left and right side plates, a double shackle in which a pair of upper and lower shackles are connected by a swivel shaft so that they can rotate freely relative to one another, and a mounting base to which the shackles are rotatably connected via a swivel shaft on the underside of a fixed plate, and a connecting bar that horizontally penetrates the double shackle between the upper parts of the pair of left and right side plates of the pulley body and the shackle on the mounting base allows them to be connected so that they can swing freely relative to one another.

[0008] According to this means, the pulley device of the present invention consists of three components, from top to bottom: a mounting base, a double shackle, and a pulley body. Each of these can change its position relative to the other by rotating about a swivel shaft and swinging about a connecting bar, so that a wide operating range of the pulley can be secured. Moreover, it can be used not only in the general hanging type in which the fixed plate of the mounting base is fixed to the ceiling surface, but also by fixing the fixed plate to a wall surface.

[0009] The connecting bar can be removed and inserted, so that the three components can be easily disassembled, facilitating transportation and storage. The connecting bar may be a pin or a bolt, but in the case of a bolt, the thread is not cut along the entire shaft, but only the tip, and the connecting part is round bar-shaped like the pin. This is to allow smooth swinging at the connecting part.

[0010] In such a disassembly structure, it is preferable that the distance between the tips of the pair of upper and lower shackles in the double shackle corresponds to the distance between the upper parts of the pair of left and right side plates of the pulley body and the distance between the tips of the shackles of the mounting base, with the lower shackle sandwiching the upper parts of the pair of left and right side plates and the upper shackle sandwiching the shackles of the mounting base. By setting the distance, the pulley body can be directly connected to the shackles of the mounting base even if the double shackles are omitted.

[0011] In particular, by making the lower shackle of the double shackle and the shackle of the mounting base have the same configuration, the manufacturing costs can be reduced by using them as common parts rather than making these shackles completely separate parts. Effect of the Invention

[0012] Since the present invention has a pulley device of the above-mentioned configuration, it is possible to provide a pulley device that has a wide operating range and can be stably attached to a wall surface and can also be fixed to a ceiling surface. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is an exploded perspective view of a pulley device according to an embodiment of the present invention; [Diagram 2] FIG. 1 is an exploded perspective view of a part of the assembled components. [Diagram 3] Same, assembly diagram (front) [Figure 4] Same, assembly diagram (side) [Diagram 5] Same, usage diagram [Figure 6] Same, other usage diagrams DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a pulley device according to an embodiment of the present invention, in which 1 is a pulley body, 2-4 are shackles, 5 is a fixed plate, and 6-7 are connecting bars. The pulley body 1 is formed by supporting a sheave 1c between a pair of left and right side plates 1a and 1b so as to be freely rotatable. Horizontal holes 1d and 1e having a diameter through which the connecting bar 6 passes horizontally and can be freely inserted and removed are formed in the upper part of the side plates 1a and 1b. 1f is a spacer that maintains the distance between the side plates 1a and 1b. The shackles 2-4 are U-shaped metal fittings formed by bending a metal plate, and horizontal holes 2a, 3a, and 4a having a diameter through which the connecting bars 6-7 pass horizontally and can be freely inserted and removed are formed in the tip of each shackle. In addition, vertical holes 2b, 3b, and 4b having a diameter through which the swivel shafts 8-9 pass vertically are formed in the horizontal base parts of the shackles 2-4. The shackle 3 has the same spacing between the tips as the side plates 1a and 1b of the pulley body 1, while the tips of the shackles 2 and 4 have a spacing that allows the shackle 3 and the side plates 1a and 1b to be sandwiched between them, and these shackles 2 and 4 have the same structure (same material). The fixing plate 5 has through holes 5a at its four corners, and can be fixed to a flat surface such as a wall or ceiling by inserting fixing members such as bolts into the through holes 5a. In this embodiment, one of the swivel shafts 9 is fixed to the underside of the fixing plate 5 by welding or the like. The connecting bars 6 to 7 have the same structure, and in this embodiment, the tip side is bendable. Nuts 10 are screwed onto the tips of the swivel shafts 8 to 9 to prevent them from coming loose.

[0015] 2 is an exploded perspective view of a partially assembled state, in which shackles 2 and 3 are connected by a swivel shaft 8 so as to be rotatable relative to each other by 360 degrees to form a double shackle 11, and shackle 4 is connected by a swivel shaft 9 of a fixed plate 5 so as to be rotatable 360 ​​degrees to form a mounting base 12. In other words, the important members of the pulley device of the present invention are, from the top, the mounting base 12, the double shackle 11, and the pulley body 1.

[0016] Figures 3 and 4 are assembly diagrams of the pulley device in a completed state with the three components connected by the connecting bars 6-7. That is, the side plates 1a and 1b of the pulley body 1 are sandwiched by the lower shackle 2 of the double shackle 11, and the upper shackle 3 of the double shackle 11 is sandwiched by the shackle 4 of the mounting base 12, and the horizontal holes 1d, 1e, and 2a and the horizontal holes 3a and 4a are aligned, and the connecting bars 6 and 7 are inserted into these horizontal holes to complete the device. By inserting the connecting bars 6 and 7 in this way, the pulley body 1 is connected to the double shackle 11 so that it can swing freely, and the double shackle 11 is also connected to the mounting base 12 so that it can swing freely. After the connecting bars 6 and 7 are inserted, the tips of the connecting bars 6 and 7 are bent to prevent them from coming loose.

[0017] Figure 5 shows how this device can be mounted on a vertical surface for use, and by fixing the fixing plate 5 of the mounting base 12 to the wall W with an appropriate number of bolts and nuts, when stationary the connecting bar 7 is bent downward by 90 degrees, and the double shackle 11 and below are in a vertical position. When in use, the rotation of the swivel shafts 8 and 9 and the swinging of the connecting bars 6 and 7 work together to expand the operating range.

[0018] Of course, this device can also be used by hanging it from the ceiling. In this case, it is only necessary to fix the fixing plate 5 of the mounting base 12 to a horizontal surface such as the ceiling. After fixing, the swing range is wider than that of the case shown in FIG.

[0019] In addition, when used for suspension, as shown in Fig. 6, even if the double shackle 11 is omitted, the pulley body 1 can be directly connected to the shackle 4 of the mounting base 12. This is because the shackle 4 has the same structure as the lower shackle 2 of the double shackle 11, and the distance between the tips of the upper shackle 3 of the double shackle 11 matches the distance between the tops of the side plates 1a and 1b of the pulley body 1.

[0020] According to the pulley device of the present embodiment described above, the operating range is wide and it can be stably attached to a wall surface and fixed to a ceiling surface. Also, since the connecting bars 6 and 7 can be inserted and removed, disassembly and assembly can be easily and freely performed. Furthermore, since the shackle 4 has the same structure as the lower shackle 2 of the double shackle 11 and the distance between the tips of the upper shackle 3 of the double shackle 11 matches the distance between the tops of the side plates 1a and 1b of the pulley body 1, the double shackle 11 can be omitted when used for hanging. Furthermore, since the lower shackle 2 of the double shackle 11 and the shackle 4 of the mounting base 12 are the same part, the manufacturing cost can be reduced compared to using different parts. [Explanation of symbols]

[0021] 1 Pulley body 1a・1b side plate 1c Sheave 2~4 shackles 5 Fixing plate 6~7 Connecting bar 8~9 Swivel axis 11 Double Shackle 12 Mounting base

Claims

1. A pulley device comprising: a pulley body having a sheave rotatably supported between a pair of left and right side plates; a double shackle in which a pair of upper and lower shackles are connected by a swivel shaft so that they can rotate freely relative to one another; and a mounting base to which the shackle is rotatably connected via a swivel shaft on the underside of a fixed plate, wherein the pulley body and the shackle on the mounting base are connected to each other so that they can swing freely relative to one another by a connecting bar that horizontally penetrates the double shackle.

2. 2. The pulley assembly according to claim 1, wherein the connecting bar is removable.

3. The pulley device of claim 2, wherein the spacing between the tips of the pair of upper and lower shackles in the double shackle corresponds to the spacing between the upper parts of the pair of left and right side plates in the pulley body and the spacing between the tips of the shackles in the mounting base, and the lower shackle is spaced so as to sandwich the upper parts of the pair of left and right side plates and the upper shackle is spaced so as to be sandwiched between the shackles in the mounting base.

4. 4. The pulley device according to claim 3, wherein the lower shackle of the double shackle and the shackle of the mounting base have the same structure.

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