JP7123375B2 - Chain holding mechanism and chain tensioning device provided with the same - Google Patents

Description

The present invention relates to a chain holding mechanism and a chain tensioning device including the same.

As shown in Patent Document 1, for example, as a device for dividing an area outdoors for the purpose of security, there is a chain tensioning device configured to stretch a chain between poles.

In the chain tensioning device shown in the same document, a chain stored inside a pole is pulled out from a side opening of a hollow cap provided at the upper end of the pole, and the tip of the chain is hooked to an appropriate part of another pole, so that both ends of the chain can be pulled out. It is configured so that the chain can be stretched between the poles.

In order to hold the chain at a length that matches the distance between the two pawls, the side opening is provided with a concave portion in which the vertical chain link is fitted. When the vertical chain link is fitted in the recess, the horizontal chain links located on both sides of the vertical chain link in the longitudinal direction cannot pass through the recess. Longitudinal movement is blocked, thereby setting the withdrawal length of the chain.

However, in the chain tensioning device shown in the same document, although the length of the chain pulled out from the pole can be easily set as described above, the chain may vibrate due to the contact of a person, and the concave portion of the side opening may be damaged. In some cases, the chain links that have been fitted in the grooves are easily separated from the recesses, and the chain is excessively pulled out from the side openings, resulting in slackening of the stretched chain.

Japanese Patent No. 5974023

The present invention has been devised under the circumstances described above, and is capable of adjusting the pull-out length of the chain with a simple operation, and the state after adjustment of the pull-out length can be reliably adjusted with a simple operation. A main object of the present invention is to provide a chain holding mechanism capable of holding a chain and a chain tensioning device having the same.

In order to solve the above problems, the present invention employs the following technical means.

That is, the chain holding mechanism provided by the first aspect of the present invention has a hollow cap member, and the cap member has a cylindrical body formed at the bottom and a part of the cylindrical body on the side surface. and an opening for pulling out the chain, which is formed so as to hang over the body, and is held by the cylindrical body by fitting around the cylindrical body. and a partially notched ring that can slide in the circumferential direction of the cylindrical body in the fitted state.

In a preferred embodiment, the partially notched ring has a thickness that allows at least the circumferential end to pass through the links of the chain, and slides in the circumferential direction of the cylindrical body to move the circumferential end. It is possible to select between a state in which the part crosses the opening and a state in which the opening is open.

In a preferred embodiment, the partially cutout ring has a C-shaped ring shape when viewed from above.

In a preferred embodiment, the partially cut-out ring is formed with a finger hooking bulge for a worker to put a finger on and slide the partially cut-out ring.

In a preferred embodiment, the cylindrical body portion is formed with a groove extending in the circumferential direction, and the partially cutout ring is slidably fitted into the groove.

In a preferred embodiment, above the cylindrical barrel portion of the cap member, a cylindrical outer surface portion having the same axial center and the same outer diameter as the cylindrical barrel portion and a recessed outer surface portion are arranged in the circumferential direction. The opening is formed from the cylindrical outer surface portion to the cylindrical body portion, and the recessed outer surface portion protrudes upward to hook the end of the chain. A latching portion is provided that can be

A chain tensioning device provided by a second aspect of the present invention comprises a vertically installable pole member and the chain connecting to the pole member by connecting the cap member to the upper end of the pole member. A chain holding mechanism according to the first side surface and a chain housed in the hollow portion of the pole member, one end of the chain being pulled out from the opening of the cap member. characterized by

In a preferred embodiment, the chain tensioning device draws out a desired length of the chain from the opening and extends the notched ring so that its tip traverses the opening and passes through the links of the chain. , and the end of the chain is hooked to another chain tensioning device.

According to the chain holding mechanism constructed as described above, the chain can be displaced in the longitudinal direction by a simple operation of sliding the partially notched ring and passing the end of the ring through the link of the chain that has been pulled out to a desired length. Therefore, it is possible to prevent the stretched chain from being unintentionally loosened.

Since the partially cutout ring is held by the cylindrical body of the cap member by being fitted around the cylindrical body, the partly cutout ring is slidably held on the cap member. No special member is required, so the chain holding mechanism can be simplified with a reduced number of parts, and does not increase costs.

Other features and advantages of the invention will become more apparent from the detailed description that follows with reference to the drawings.

1 is a side view of a chain tensioning device according to an embodiment of the present invention; FIG. FIG. 2 is a front view of the chain tensioning device shown in FIG. 1; FIG. 4 is a front view of the cap member with the partially cutout ring removed; FIG. 3 is a sectional view taken along line IV-IV of FIG. 2; FIG. 3 is a view corresponding to a cross section taken along line IV-IV of FIG. 2 in the chain stored state; FIG. 5 is a view corresponding to the section taken along the line VI-VI of FIG. 4 and for explaining the action, showing a state in which the opening of the cap member is open; FIG. 5 is a view corresponding to the section taken along the line VI-VI of FIG. 4 and for explaining the action, showing a state in which the partially cutout ring crosses the opening of the cap member;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

1 to 7 show a chain holding mechanism B and a chain tensioning device A having the same according to one embodiment of the present invention.

The chain tensioning device A includes a pedestal 10, a pole member 20, and a chain holding mechanism B. As shown in FIG.

The pedestal 10 is for holding the pole member 20 vertically, has a truncated cone shape whose height is lower than the diameter of the bottom surface, and is made of rubber, for example. The pedestal 10 is provided with a holding hole 11 penetrating in the vertical direction, and the pole member 20 is combined with the pedestal 10 by inserting the lower portion thereof into the holding hole 11 of the pedestal 10 .

The pole member 20 is composed of, for example, a hollow cylindrical pipe made of stainless steel and having a desired length.

The chain holding mechanism B includes a cap member 200. The cap member 200 is attached to the pole member by inserting a cylindrical connecting portion 201 integrally connected to the lower portion thereof into the upper end portion of the pole member. (Fig. 4). The cap member and the cylindrical connecting portion are formed by resin molding such as PP, for example.

The cap member 200 is generally hollow with an open bottom and a dome-shaped ceiling 212 at the top. The recessed outer surface portion 220 is formed on the side surface, and the region other than the recessed outer surface portion 220 on the side surface above the cylindrical body portion 210 has the same axial center and the same outer diameter as the cylindrical body portion 210. It has a cylindrical outer surface portion 230 .

The cap member 200 is further formed with an opening 231 extending from one cylindrical outer surface portion 230 to the cylindrical body portion 210 for pulling out the chain 30 described later. The opening 231 is long in the vertical direction and has an oval shape that widens toward the bottom.

The cap member 200 is further provided with a hooking portion 221 located within the recessed outer surface portion 220 and capable of hooking the tip of the chain 30 or the chain link 31 . More specifically, the latching portion 221 integrally extends upward from the lower shelf portion 222 of the recessed outer surface portion 220, and has a bar shape whose upper end portion is inclined inward in the radial direction of the cap member 200. there is

The cylindrical body portion 210 of the cap member 200 is held by the cylindrical body portion 210 by being fitted around the cylindrical body portion 210, and in the fitted state, the cylindrical body portion 210 is held in the circumferential direction of the cylindrical body portion 210. A partially cutout ring 300 that can be slidably moved is attached to the . In the present embodiment, the partially cutout ring 300 has a C-shaped ring shape when viewed from the top, as if a part of the ring is cut out and removed. It is slidably fitted in the recessed groove 211 . The partially cutout ring 300 is attached to the cylindrical body portion 210 of the cap member 200 while being constrained by the groove 211 in this way. No separate member is required.

This recessed groove 211 is formed at a vertical position overlapping the lower part of the opening 231. Therefore, by sliding the partially notched ring 300 along the recessed groove 211 in the circumferential direction of the cylindrical body 210, A state in which the circumferential end portion 320 of the partially cutout ring 300 crosses the opening 231 (FIGS. 4 and 7) and a state in which the opening 231 is open (FIGS. 2 and 6) can be selected. can. The part of the partially cut-out ring 300 that crosses the opening 231 (the circumferential end 320 of the partially cut-out ring 300) has a thickness that allows the link 31 of the chain 30 to pass through. .

In the present embodiment, the partially cutout ring 300 is formed with a finger hooking bulge 310 for the operator to put a finger on and slide the partially cutout ring 300 .

It should be noted that the partially notched ring 300 can be molded by resin molding and has a certain degree of springiness. It can be attached to the cap member 200 by fitting it into the concave groove 211 with its springiness.

A chain 30 is housed in the hollow portion of the pole member 20 . The chain 30 may be of a known type in which a plurality of oblong links 31 are connected, and may be made of plastic or metal. The overall length of this chain 30 is determined according to how much stretched length is required. In this embodiment, the base end of the chain 30 is connected to the fixing portion 21 provided at the bottom of the hollow portion of the pole member 20, and the tip end is pulled out from the opening 231 of the cap member 200. As shown in FIG. The tip of the chain 30 has a carabiner 32 with a width that cannot pass through the opening 231 .

When the chain tensioning device A is not in use, most of the chain 30 is stored inside the pole member 20 or the cap member 200, but the carabiner 32 at the tip is caught in the opening 231 and the opening 231 is closed. It faces the outside (Fig. 5). The chain 30 is structurally foldable so that it can be stored inside the pole member 20 or the cap member 200 even though it has a considerable overall length.

Next, a method of using the chain tensioning device having the above configuration will be described.

The partially notched ring 300 is selected to open the opening 231 of the cap member 200 (FIG. 6), the chain 30 is pulled out from the opening 231 to a desired length, and the partially notched ring 300 is attached to the opening 231. Slide tip 320 past link 31 of chain 30 and across opening 231 (FIG. 7). Then, the tip (carabiner 32) of the chain 30 is hooked on the latching portion 221 of the cap portion 200 of another chain tensioning device A, for example. In this manner, the chain 30 can be stretched between the two chain tensioning devices A. In this state, the partially notched ring 300 passes through the link 31 of the chain 30, thereby reliably preventing the chain from slipping in the longitudinal direction. Even if the chain 30 shakes, it is possible to prevent the chain 30 from being unintentionally drawn excessively from the opening 231 and becoming slack.

The partially cutout ring 300 can be slid without any resistance, and in the embodiment, especially the finger hooking bulge 310 is formed, so that the chain 30 can be easily held.

The scope of the present invention is not limited to the above-described embodiments, and all modifications within the scope of matters described in each claim are included in the scope of the present invention.

For example, the partially notched ring 300 may be attached to the circumference of the cylindrical body portion 210 of the cap member 200 so as to be slidable in the circumferential direction. In addition to allowing the sliding in the circumferential direction while restricting the displacement, by providing projections at positions sandwiching the partially cutout ring 300 vertically, it is possible to restrict the displacement of the partially cutout ring 300 in the vertical direction. You can also

In the above description, it is assumed that the chain 30 is stretched by hooking the tip of the pulled-out chain 30 on the hook portion 221 of the other chain tensioning device A, but the end of the chain 30 is hooked. The mating member is irrelevant. For example, a carabiner at the tip of the chain may be connected to a ring portion provided on the wall.

In this embodiment, the carabiner 32 is provided at the tip of the chain 30, but a ring-shaped member that cannot pass through the opening 231 of the cap member 200 may be provided.

A Chain tensioning device B Chain holding mechanism 10 Base 11 Holding hole 20 Pole member 21 Fastening part 30 Chain 31 Link 32 Carabiner 200 Cap member 201 Cylindrical connecting part 210 Cylindrical body part 211 Groove 212 Ceiling 220 Recessed outer surface part 221 hooking portion 222 shelf portion 230 cylindrical outer surface portion 231 opening portion 300 partially notched ring 310 finger hooking swelling portion 320 circumferential end portion

Claims (6)

having a hollow cap member,
The cap member has a cylindrical body formed at the bottom, and an opening formed on a side surface so that a part of the cap member overlaps the cylindrical body and is used to pull out the chain,
The cylindrical body is held by the cylindrical body by being fitted around the cylindrical body, and is slidable in the circumferential direction of the cylindrical body in the fitted state. A notched ring is provided ,
The partially notched ring is in the shape of a C-shaped ring obtained by removing a part of a circular ring, and has a thickness such that the circumferential end, which is the end of the C-shaped ring, can pass through the links of the chain. and a state in which the end portion in the circumferential direction traverses the opening by sliding in the circumferential direction of the cylindrical body and a state in which the opening is opened can be selected . , chain retention mechanism. 2. The chain holding mechanism according to claim 1 , wherein the partially cut-out ring is formed with a bulging portion for a finger hook for an operator to put a finger on to slide the partially cut-out ring. 3. The chain retainer according to claim 1, wherein the cylindrical body has a groove extending in the circumferential direction, and the partially notched ring is slidably fitted in the groove. mechanism. Above the cylindrical body portion of the cap member, a cylindrical outer surface portion having the same axial center and the same outer diameter as the cylindrical body portion, and a recessed outer surface portion are arranged side by side in the circumferential direction. The opening is formed from the cylindrical outer surface portion to the cylindrical trunk portion, and the recessed outer surface portion has a hooking portion that protrudes upward and can be hooked with the end of the chain. 4. A chain retaining mechanism according to any one of claims 1 to 3 , wherein a is provided. 5. The chain holding mechanism according to claim 1 , which is connected to the pole member by means of a pole member which can be installed vertically, the cap member connected to the upper end of the pole member, and the pole. and a chain housed in a hollow portion of a member, wherein one end of the chain is pulled out from the opening of the cap member. A desired length of the chain is pulled out from the opening, and the partially cut ring is slid so that its tip crosses the opening and passes through the links of the chain, and the tip of the chain is attached to the other chain. 6. The chain tensioning device according to claim 5 , which is used by being hooked to the tensioning device.

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