Band fixing device and deformation prevention body

Abstract

The present invention provides a band-type fixing device that suppresses deformation of the main body and allows the operating lever to be kept in a closed position. [Solution] The fixing device 5 comprises a band fastener 3 that pulls a band 2 surrounding the circular body 1 in the circumferential direction and fixes it to the circular body 1, and a deformation prevention body 4. The band fastener 3 comprises a main body 6 that is applied to the circular body 1 and has a holding part 6a that holds one end 2a of the band 2, a band winding shaft 7 that is positioned on one end 6c of the main body 6 and winds up the other end 2b of the band 2 by rotation, and an operating lever 8 that rotates the band winding shaft 7. The deformation prevention body 4 is interposed between the main body 6 and the circular body 1 to support the main body 6 and prevents the main body 6 from deforming to the point where the operating lever 8 can no longer be closed relative to the main body 6 due to the winding of the band 2.

Description

Technical Field

[0001] The present invention relates to a fixing device for a band body to a cylindrical body such as a utility pole, and a deformation prevention body.

Background Art

[0002] Conventionally, there has been a band tightening tool for tightening and fixing a flexible band-shaped body to a cylindrical body such as a utility pole (see, for example, Patent Document 1). As shown in FIGS. 20 and 21, this band tightening tool 13 includes a tightening tool main body 14 that abuts against the cylindrical body 11, a band winding shaft 15 that winds up the band 12, and a rotation operation lever 16 that rotates the band winding shaft 15. Therefore, by rotating the rotation operation lever 16 to open and close with respect to the tightening tool main body 14, the band 12 can be tightened. After tightening, the rotation operation lever 16 is closed, and the concave portion 16a provided on the rotation operation lever 16 is engaged with the convex portion 14a provided on the tightening tool main body 14 to maintain the tightened state of the band 12. Further, the side of the tightening tool main body 14 facing the cylindrical body 11 was formed in a curved surface so as to be stably arranged.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the conventional band tightening tool 13, when the diameter of the cylindrical body 11 is small and the tightening tool main body 14 cannot abut against two positions shifted in the circumferential direction of the cylindrical body 11, when the band 12 is tightened, both ends of the tightening tool main body 14 may be deformed so as to approach the cylindrical body 11, there is a risk of breakage, or in some cases, due to the deformation, the concave portion 16a of the rotation operation lever 16 may not be engaged with the convex portion 14a of the tightening tool main body 14, and improvement has been demanded.

[0005] This invention was made to solve the aforementioned drawbacks of the conventional invention, and its purpose is to provide a band fixing device and a deformation prevention body that can suppress deformation of the main body and keep the operating lever in a closed position. [Means for solving the problem]

[0006] The band fixing device and deformation prevention body according to this invention have the following configuration in order to achieve the above objective. That is, The band fixing device according to claim 1 comprises a band fastener that fixes a band surrounding a circular body in the circumferential direction to the circular body by pulling the band to reduce its diameter, and a deformation prevention body. Here, the band fastener comprises a main body having a holding portion that holds one end of the band and positioned so that its extending direction is aligned with the circumferential direction of the circular body, a band winding shaft positioned on one end of the main body in the extending direction and rotating to wind up the other end of the band, and an operating lever that rotates the band winding shaft. On the other hand, the deformation prevention body is interposed between the main body and the circular body to support the main body in order to prevent the main body from deforming to the point where the operating lever can no longer be closed relative to the main body due to the winding of the band.

[0007] According to this fixing device, the band fastener comprises a main body, a band winding shaft located at one end of the main body, and an operating lever that rotates the band winding shaft. By winding the band body with the band winding shaft, the band body surrounding the circular body in the circumferential direction is pulled, and thereby the band body is fixed to the circular body by tightening it. The deformation prevention member is interposed between the main body of the band fastener and the circular body to support the main body, thereby suppressing deformation of the main body due to the winding of the band body and enabling the operating lever to be closed relative to the main body. If the operating lever has an engaging portion and the main body has an engaged portion that engages with the engaging portion to hold the operating lever in a closed position, then once the band body is fixed to the circular body, the engaged portion and the engaging portion engage with each other to hold the operating lever in a closed position. The deformation prevention member is interposed between the main body of the band fastener and the circular body to support the main body, thereby suppressing deformation of the main body due to the winding of the band body and enabling engagement between the engaged portion and the engaging portion.

[0008] Furthermore, the band fixing device according to claim 2 is the band fixing device according to claim 1, wherein the deformation prevention body has an overhang that extends beyond the other end of the main body, and the overhang guides one end of the band from the holding part side to the circular body side. By guiding one end of the band with the overhang, bending of that end can be prevented.

[0009] Furthermore, the band fixing device according to claim 3 is the band fixing device according to claim 2, wherein the deformation prevention body has an assembly portion that engages with the main body for assembly. This makes it easier to handle the band fastener and the deformation prevention body, and if the main body (band fastener) and the deformation prevention body are assembled, there is no need to align the main body and the deformation prevention body.

[0010] Furthermore, the band fixing device according to claim 4 is the band fixing device according to claim 3, wherein the deformation prevention body is provided with an anti-slip member on the side facing the circular body. The anti-slip member prevents the deformation prevention body from slipping relative to the circular body.

[0011] Furthermore, the band fixing device according to claim 5 is a band fixing device according to any one of claims 1 to 4, wherein the main body, between one end and the other end in the extending direction, has a side facing the circular body that can abut at least two circumferentially offset locations on the circular body of the first diameter, but cannot abut at two or more circumferentially offset locations on the circular body of the second diameter, which is smaller in diameter than the first diameter. The deformation prevention body has a circular body side contact portion that can abut at least two circumferentially offset locations on the circular body of the second diameter.

[0012] Furthermore, the deformation prevention body according to claim 6 is a deformation prevention body interposed between the main body of a band fastener that fixes a band body surrounding a circular body in the circumferential direction to the circular body by pulling the band body to reduce the diameter of the enclosure, and the circular body. Here, the band fastener comprises the main body which has a holding portion that holds one end of the band body and is positioned so that its extending direction is aligned with the circumferential direction of the circular body, a band winding shaft which is positioned on one end of the main body in the extending direction and winds up the other end of the band body by rotation, and an operating lever which rotates the band winding shaft. The deformation prevention body has a circular body side contact portion on the side facing the circular body which can contact at least two circumferentially offset locations on the circular body, and is interposed between the main body and the circular body to support the main body in order to prevent the main body from deforming to the point where the operating lever can no longer be closed relative to the main body due to the winding of the band body.

[0013] According to this deformation prevention body, the deformation prevention body is interposed between the main body and the circular body of the band fastener to support the main body, thereby suppressing deformation of the main body due to the winding of the band, and making it possible to keep the operating lever closed relative to the main body.

[0014] Furthermore, the deformation prevention body according to claim 7 is the deformation prevention body according to claim 6, having an assembly portion on the side facing the main body that engages with and is assembled to the main body. This makes it easier to handle the band fastener and the deformation prevention body, and if the main body (band fastener) and the deformation prevention body are assembled, there is no need to align the main body and the deformation prevention body. [Effects of the Invention]

[0015] According to the band fixing device and deformation prevention body of this invention, the deformation prevention body suppresses deformation of the main body of the band fastener, allowing the operating lever to be kept in the closed position. [Brief explanation of the drawing]

[0016] [Figure 1] This is a cross-sectional view of the fixing device and circular body in one embodiment of the present invention, showing the start of winding the band body with the operating lever in the open position. [Figure 2] Similarly, this is a cross-sectional view of the fixing device and the circular body with the band body fully wound up and the operating lever closed. [Figure 3] Similarly, this is a perspective view of the locking mechanism when the operating lever is opened. [Figure 4] Similarly, this is a front view of the locking device when the operating lever is open. [Figure 5] Similarly, this is a plan view of the fixing device when the operating lever is opened. [Figure 6] Similarly, this is a cross-sectional view taken along line AA in Figure 4. [Figure 7] Similarly, this is a perspective view of the locking mechanism when the operating lever is closed. [Figure 8] Similarly, this is a perspective view of the band tightening device when the operating lever is opened. [Figure 9] Also, it is a front view of the band fastener when the operation lever is opened. [Figure 10] Also, it is a plan view of the band fastener when the operation lever is opened. [Figure 11] Also, it is a cross-sectional view taken along line B-B in FIG. 10. [Figure 12] Also, it is a perspective view of the band fastener when the operation lever is closed. [Figure 13] Also, it is a front view of the band fastener when the operation lever is closed. [Figure 14] Also, it is a perspective view of the deformation prevention body. [Figure 15] Also, it is a front view of the deformation prevention body. [Figure 16] Also, it is a plan view of the deformation prevention body. [Figure 17] Also, it is a cross-sectional view taken along line C-C in FIG. 16. [Figure 18] It is a view corresponding to FIG. 2 of another embodiment of this invention. [Figure 19] Also, it is a perspective view of the deformation prevention body. [Figure 20] It is a cross-sectional view of a state where a band is tightened by a conventional band fastener. [Figure 21] Also, it is a cross-sectional view of a state where the band is tightened.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments for carrying out this invention will be described based on the drawings.

[0018] FIGS. 1 to 17 show an embodiment of the present invention. In the figures, reference numeral 1 indicates a circular body. 2 indicates a band body. 3 indicates a band fastener that pulls the band body 2 surrounding the circular body 1 in the circumferential direction to fix it to the circular body 1 so as to reduce the diameter of the surrounding. 4 indicates a deformation prevention body. 5 indicates a fixing device for the band body.

[0019] The band fixing device 5 comprises a band fastener 3 and a deformation prevention body 4. The band fastener 3 comprises a main body 6 which has a holding portion 6a that holds one end 2a of the band body 2 and is positioned so that its extending direction 6b is aligned with the circumferential direction of the circular body 1, a band winding shaft 7 which is positioned on one end 6c of the main body 6 in the extending direction 6b and rotates to wind up the other end 2b of the band body 2, and an operating lever 8 which rotates the band winding shaft 7. Here, the operating lever 8 has, for example, an engaging portion 8b on its tip side 8a. The main body 6 has, for example, an engaged portion 6e on the other end side 6d of the extending direction 6b that engages with the engaging portion 8b to hold the operating lever 8 in a closed state (that is, with the tip side 8a of the operating lever 8 aligned with the other end side 6d of the main body 6).

[0020] The deformation prevention body 4 is interposed between the main body 6 and the circular body 1 to support the main body 6 (and consequently the band fastener 3) in order to prevent the main body 6 from deforming until the operating lever 8 can no longer be closed relative to the main body 6 due to the winding of the band body 2 by the band fastener 3 (in the illustrated embodiment, until engagement between the engaged portion 6e and the engaging portion 8b of the band fastener 3 becomes impossible). The deformation prevention body 4 has a main body side contact portion 4a that can abut against the side of the main body 6 facing the circular body 1. The deformation prevention body 4 also has a circular body side contact portion 4b on the side facing the circular body 1 (that is, on the opposite side from the main body side contact portion 4a) that can abut against the circular body 1 (more specifically, at least two circumferentially offset locations on the circular body 1 (for example, the second diameter circular body 102 described later)).

[0021] In detail, the main body 6 of the band fastener 3, between one end and the other end in the extending direction 6b, is capable of contacting at least two circumferentially offset locations on the first diameter circular body 101, which constitutes the circular body 1. However, it is not capable of contacting two or more circumferentially offset locations on the second diameter circular body 102, which constitutes the circular body 1 and has a smaller diameter than the first diameter (see Figure 11). In other words, if the main body 6 of the band fastener 3 is applied directly to the second diameter circular body 102 without the interposition of the deformation prevention body 4, the main body 6 will only contact the second diameter circular body 102 at one circumferential location, and not at two or more locations. As a result, the main body 6 may deform due to the tightening of the band body 2 to the point where engagement between the engaged portion 6e and the engaging portion 8b becomes impossible.

[0022] Furthermore, the deformation prevention body 4 has an overhang portion 4c that extends beyond the other end 6d of the main body 6, and this overhang portion 4c guides one end 2a of the band body 2 from the holding portion 6a side of the main body 6 to the circular body 1 side.

[0023] Specifically, the circular body 1 is a solid or hollow body with a circular cross-section and a circular outer surface, such as a cylinder or a cylindrical body. Advertisements, signs, cables, pipes, and various other devices are attached to this circular body 1 (for example, a utility pole or a pole) using the band body 2.

[0024] In the band fastening device 3, the main body 6 has a bottom surface 6f, which is the side facing the circular body 1, formed in an arc shape with a concave shape. More specifically, the main body 6 comprises a pair of arc-extending side plates 6g, 6g and a bottom plate 6h, and the entire body is curved in an arc shape with a concave shape on the side facing the circular body 1, and the bottom surface 6f of the main body 6 is formed by the lower end surfaces of the side plates 6g and the lower surface of the bottom plate 6h. The bottom plate 6h has first and second connecting pieces 6i, 6j that connect the pair of side plates 6g, 6g at an intermediate position in the extending direction 6b (i.e., the arc-extending direction of the main body 6 (especially the bottom surface 6f)), and a rib piece 6k that extends inward from each side plate 6g at the other end side 6d of the extending direction 6b. Here, the first connecting piece 6i is located at one end side 6c of the extending direction 6b, further than the second connecting piece 6j, and becomes the aforementioned holding portion 6a. Therefore, one end 2a of the band body 2 passes over the bottom plate 6h from the other end 6d in the extending direction 6b of the main body 6, and after passing the first connecting piece 6i (holding part 6a), it is folded back, passes under the first connecting piece 6i, is passed between the first connecting piece 6i and the second connecting piece 6j, and passes over the second connecting piece 6j, thus returning to its original path. In addition, the side plate 6g is provided with the aforementioned engaging portion 6e, and this engaging portion 6e consists of a projection.

[0025] The operating lever 8, like the main body 6, is formed in an arc shape, with a pair of arc-shaped side plates 8c, 8c and a top plate 8d connecting the side plates 8c, 8c. Here, each side plate 8c of the operating lever 8 is located outside the respective side plates 6g of the main body 6, and the side plates 8c, 8c of the operating lever 8 are positioned to sandwich the side plates 6g, 6g of the main body 6. The side plates 8c are provided with the aforementioned engaging portion 8b, which consists of a hole into which a projection that becomes the engaged portion 6e engages.

[0026] The band winding shaft 7 has a vertically elongated through hole 7a that penetrates in a direction perpendicular to its axis, and the other end 2b of the band body 2 is inserted into the through hole 7a and wound up. This band winding shaft 7 is provided so as to penetrate the side plate 6g portion of one end 6c of the main body 6 and the side plate 8c portion of the base end 8e of the operating lever 8. Thus, a ratchet mechanism is provided between the band winding shaft 7, the main body 6 and the operating lever 8, so that when the operating lever 8 is rotated to open relative to the main body 6, the operating lever 8 rotates together with the band winding shaft 7, and when the operating lever 8 is rotated to close relative to the main body 6, the band winding shaft 7 is held by the main body 6 and only the operating lever 8 rotates. In this way, by repeatedly opening and closing the operating lever 8, the band winding shaft 7 rotates intermittently in one direction, and the band body 2 is wound onto the band winding shaft 7.

[0027] As described above, the deformation prevention body 4 has an overhang 4c, and this overhang 4c makes it longer than the main body 6 of the band fastener 3. Similar to the main body 6, the bottom surface of the deformation prevention body 4, which is the side facing the circular body 1 (i.e., the aforementioned circular body side contact portion 4b), is formed in a concave arc shape. In detail, the deformation prevention body 4 as a whole is curved in an arc shape that is convex toward the main body 6, and the aforementioned main body side contact portion 4a is also formed in a convex arc shape. Furthermore, on its upper side (i.e., the side facing the main body 6), in addition to the main body side contact portion 4a, the deformation prevention body 4 has an assembly portion 4d that engages with and is assembled to the main body 6. This assembly portion 4d consists of a top wall, and the rib piece 6k of the main body 6 is inserted into the space below (inside) this assembly portion 4d.

[0028] Furthermore, the main body side contact portion 4a of the deformation prevention body 4 is capable of contacting at least two locations on the side of the main body 6 of the band fastener 3 facing the circular body 1 (i.e., the bottom surface 6f) that are offset in the extending direction 6b. In the illustrated embodiment, before the band body 2 is tightened, the main body 6 and the deformation prevention body 4 are in contact at only one location on the main body 6 (in the illustrated embodiment, the other end side 6d of the main body 6) (see Figures 1, 4, and 6). When the band body 2 is tightened, the main body 6 deforms slightly, causing it to contact the deformation prevention body 4 continuously in the extending direction 6b (i.e., at multiple locations) (see Figure 2). However, this deformation of the main body 6 is slight and does not affect the engagement between the engaged portion 6e and the engaging portion 8b.

[0029] Furthermore, the deformation prevention body 4 is provided with an anti-slip member 9 on the side facing the circular body 1. This anti-slip member 9 is made of a plate-shaped rubber material. The lower surface of this anti-slip member 9 becomes the bottom surface of the deformation prevention body 4 (i.e., the contact portion 4b on the circular body side). The diameter of this bottom surface (contact portion 4b on the circular body side) of the deformation prevention body 4 is smaller than the diameter of the contact portion 4a on the upper side of the main body of the deformation prevention body 4, and is also smaller than the diameter of the bottom surface 6f of the main body 6 of the band fastener 3 (i.e., the surface facing the circular body 1). Figures 1 and 2 show the case where a circular body 102 with a second diameter smaller than the first diameter (for example, a diameter equal to the diameter of the bottom surface 6f of the main body 6) is used, and the diameter of the circular body matches the diameter of the bottom surface (circular body side contact portion 4b) of the deformation prevention body 4. In this case, the deformation prevention body 4's bottom surface (circular body side contact portion 4b) contacts the circular body 102 continuously in the circumferential direction (i.e., at multiple locations). For a circular body with a diameter larger than the diameter of the circular body 102, the deformation prevention body 4's bottom surface (circular body side contact portion 4b) contacts the circular body at two locations offset in the circumferential direction.

[0030] Next, the effects of the fixing device 5, which comprises the band fastener 3 and deformation prevention body 4 configured as described above, will be explained. According to this fixing device 5, the band fastener 3 comprises a main body 6, a band winding shaft 7 positioned at one end 6c of the main body 6, and an operating lever 8 that rotates the band winding shaft 7. By winding the band body 2 with the band winding shaft 7, the band body 2 surrounding the circular body 1 in the circumferential direction is pulled, and as a result, the band body 2 fastens to the circular body 1 and fixes it to the circular body 1. The deformation prevention body 4 is interposed between the main body 6 of the band fastener 3 and the circular body 1 to support the main body 6, thereby suppressing deformation of the main body 6 due to the winding of the band body 2 and making it possible to close the operating lever 8 relative to the main body 6. In the illustrated embodiment, the main body 6 has an engaged portion 6e on its other end 6d, and the operating lever 8 has an engaged portion 8b on its tip end 8a. When the band body 2 is fixed to the circular body 1, the engaged portion 6e and the engaged portion 8b engage with each other, holding the operating lever 8 in a closed state. The deformation prevention body 4 is interposed between the main body 6 of the band fastener 3 and the circular body 1 to support the main body 6, thereby suppressing deformation of the main body 6 due to the winding of the band body 2, and enabling engagement between the engaged portion 6e and the engaged portion 8b of the band fastener 3. In other words, the deformation prevention body 4 suppresses deformation of the main body 6 of the band fastener 3, allowing the operating lever 8 to be kept in a closed state (more specifically, it enables engagement between the engaged portion 6e of the main body 6 and the engaged portion 8b of the operating lever 8, and holds the operating lever 8 in a closed state).

[0031] Furthermore, the deformation prevention body 4 has circular body side contact portions 4b that can contact at least two circumferentially offset locations on the circular body 1, thereby preventing deformation of the deformation prevention body 4 itself.

[0032] Furthermore, the deformation prevention body 4 has an overhang portion 4c, which guides one end 2a of the band body 2, thereby preventing bending of that end 2a, and further enhancing the effect of preventing deformation of the main body 6 of the band fastener 3.

[0033] Furthermore, the deformation prevention body 4 has an assembly portion 4d that engages with the main body 6 of the band fastener 3 for assembly. This makes it easier to handle the band fastener 3 and the deformation prevention body 4. Also, once the main body 6 (and thus the band fastener 3) and the deformation prevention body 4 are assembled, there is no need to align the main body 6 (band fastener 3) and the deformation prevention body 4 thereafter. Moreover, if one end 2a of the band body 2 is attached to the main body 6 before assembling the deformation prevention body 4, the band body 2 is less likely to fall off the main body 6.

[0034] Furthermore, the deformation prevention body 4 is provided with an anti-slip member 9 on the side facing the circular body 1. This anti-slip member 9 prevents the deformation prevention body 4 from slipping against the circular body 1, and if the anti-slip member 9 is made of a soft rubber material, it can also soften the contact with the circular body 1.

[0035] It should be noted that the present invention is not limited to the embodiments described above, and various other modifications are possible. For example, the deformation prevention body 4 has an overhang portion 4c, but this overhang portion 4c may be omitted.

[0036] Furthermore, although the deformation prevention body 4 has an assembly portion 4d that engages with the main body 6 of the band fastener 3 and is assembled to it, it is also possible to simply have the deformation prevention body 4 interposed between the main body 6 of the band fastener 3 and the circular body 1 without providing this assembly portion 4d.

[0037] Furthermore, the deformation prevention body 4 is provided with an anti-slip member 9, but this anti-slip member 9 is optional.

[0038] Furthermore, the deformation prevention body 4 is not limited to a circular body 102 with a second diameter, but may be used for a circular body with a smaller diameter (i.e., a circular body with a smaller diameter than the diameter of the bottom surface of the deformation prevention body 4) as long as the deformation prevention body 4 has sufficient rigidity and strength (i.e., rigidity and strength to resist the pressure caused by the reduction in diameter of the band body 2).

[0039] Furthermore, the deformation-preventing body 4 does not have to be formed in a concave arc shape at its bottom; it may be formed in other shapes, such as a concave corner shape.

[0040] Furthermore, the deformation prevention body 4 does not necessarily have to be interposed in such a way that it lifts the entire main body 6 (band fastener 3) away from the circular body 1. It may also be configured such that a part of the main body 6 abuts against the circular body 1 (more specifically, the circular body 102 of the second diameter), as shown in Figures 18 and 19. In the illustrations, the other end 6d of the main body 6 abuts against the circular body 1, but it may also be configured so that one end 6c of the main body 6 abuts against the circular body 1.

[0041] Furthermore, the deformation prevention body 4 can prevent the main body 6 from deforming to the point where the operating lever 8 can no longer be closed relative to the main body 6, even for band fasteners 3 that do not have an engaged portion 6e and an engaged portion 8b. [Explanation of Symbols]

[0042] 1. Circular body 101 Circular body of the first diameter 102 Circular body of the second diameter 2-band body 2a One end side 2b Other end side 3. Band fasteners 4. Deformation prevention body 4b Circular body side contact part 4c Overhang 4d Assembly section 5. Fixing device for the band body 6 Main unit 6a Holding part 6b Extending direction 6c One end side 6d Other end side 6e Engaged part 7-band reel 8. Operating lever 8a Tip side 8b Engagement part 9 Anti-slip material

Claims

1. A band fixing device comprising a band fastener that pulls a band surrounding a circular body in the circumferential direction to reduce its diameter and fix it to the circular body, and a deformation prevention body, The band fastening device comprises a main body having a holding portion that holds one end of the band body and is positioned so that its extending direction aligns with the circumferential direction of the circular body, a band winding shaft positioned on one end of the main body in the extending direction and rotating to wind up the other end of the band body, and an operating lever that rotates the band winding shaft. The deformation prevention body is a fixing device for the band body, which is interposed between the main body and the circular body to support the main body in order to prevent the main body from deforming to the point where the operating lever can no longer be closed relative to the main body due to the winding of the band body.

2. The fixing device for a band body according to claim 1, wherein the deformation-preventing body has an overhang that extends beyond the other end of the main body, and the overhang guides one end of the band body from the holding part side to the circular body side.

3. The band fixing device according to claim 2, wherein the deformation-preventing body has an assembly portion that engages with and is assembled to the main body.

4. The band body fixing device according to claim 3, wherein the deformation-preventing member is provided with an anti-slip member on the side facing the circular body.

5. The main body, between one end and the other in the extending direction, has a side facing the circular body that can abut at least two circumferentially offset locations on the circular body having a first diameter, but cannot abut at two or more circumferentially offset locations on the circular body having a second diameter smaller than the first diameter. The band fixing device according to any one of claims 1 to 4, wherein the deformation-preventing body has circular body-side contact portions that can contact at least two circumferentially offset locations of the circular body of the second diameter.

6. A deformation-preventing body interposed between the main body of a band fastener that secures a band surrounding a circular body in the circumferential direction to the circular body by pulling the band to reduce its diameter, The band fastening device comprises a main body having a holding portion for holding one end of the band body and positioned so as to align its own extending direction with the circumferential direction of the circular body, a band winding shaft positioned on one end of the main body in the extending direction and rotating to wind up the other end of the band body, and an operating lever for rotating the band winding shaft. The deformation prevention body has circular body-side contact portions on the side facing the circular body that can contact at least two circumferentially offset locations on the circular body, and is interposed between the main body and the circular body to support the main body in order to prevent the main body from deforming to the point where the operating lever can no longer be closed relative to the main body due to the winding of the band body.

7. The deformation prevention body according to claim 6, having an assembly portion on the side facing the main body that engages with and is assembled to the main body.

Images