JP7576993B2 - sleeve - Google Patents

Description

The present invention relates to a sleeve that is attached to a through hole formed through a body and has an insertion hole on the inside for passing an insertion member through.

A sleeve pipe made of a fire-resistant thermal expansion material is known, which is attached to a through hole formed to penetrate the framework of a building, such as a wall or floor, and which has an insertion hole on the inside for passing an insertion member such as a water supply pipe, a refrigerant pipe, or an electrical conduit therethrough (see Patent Document 1).
In Patent Document 1, a threaded portion formed on the inner surface of a first sleeve tube (first sleeve) and a threaded portion formed on the outer surface of a second sleeve tube (second sleeve) are screwed together to combine the first sleeve tube and the second sleeve tube within a through hole to form a sleeve tube (sleeve) installed in the through hole.
In the sleeve pipe of Patent Document 1, a threaded portion formed on the inner surface of the first sleeve pipe and a threaded portion formed on the outer surface of the second sleeve pipe are screwed together to connect them, making it possible to accommodate bodies of different thicknesses.
However, in the sleeve pipe of Patent Document 1, when the first sleeve pipe and the second sleeve pipe are joined in the through hole, the boundary between the inner peripheral surface of the first sleeve pipe and the inner peripheral surface of the second sleeve pipe becomes a step. That is, the diameter of the inner peripheral surface of the first sleeve pipe is larger than the diameter of the inner peripheral surface of the second sleeve pipe, and the inner peripheral surfaces of the first sleeve pipe and the second sleeve pipe do not have the same diameter centered on the central axis of the through hole. Therefore, the distance between the outer peripheral surface of the insertion member passed through the insertion hole of the sleeve pipe and the inner peripheral surface of the first sleeve pipe and the distance between the outer peripheral surface of the insertion member and the inner peripheral surface of the second sleeve pipe are not constant.
In addition, in the sleeve pipe of Patent Document 1, when the first sleeve pipe and the second sleeve pipe are joined in the through hole, the boundary between the outer circumferential surface of the first sleeve pipe and the outer circumferential surface of the second sleeve pipe becomes a step. That is, the diameter of the outer circumferential surface of the first sleeve pipe is larger than the diameter of the outer circumferential surface of the second sleeve pipe, and the outer circumferential surfaces of the first sleeve pipe and the second sleeve pipe do not have the same diameter about the central axis of the through hole, so that the distance between the circumferential surface of the through hole and the outer circumferential surface of the first sleeve pipe and the distance between the circumferential surface of the through hole and the outer circumferential surface of the second sleeve pipe are not constant.

JP 2012-57320 A

As described above, the sleeve pipe of Patent Document 1 has a configuration in which the interval between the peripheral surface of the through hole and the outer peripheral surface of the first sleeve pipe and the interval between the peripheral surface of the through hole and the outer peripheral surface of the second sleeve pipe are not constant, and the interval between the outer peripheral surface of the insertion member passed through the insertion hole of the sleeve pipe and the inner peripheral surface of the first sleeve pipe and the interval between the outer peripheral surface of the insertion member and the inner peripheral surface of the second sleeve pipe are not constant. Therefore, it is difficult to reliably and easily perform a process of filling a filler between the peripheral surface of the through hole and the outer peripheral surface of the sleeve pipe in order to close the interval between the peripheral surface of the through hole and the outer peripheral surface of the sleeve pipe, which makes the construction complicated. Furthermore, it is difficult to reliably and easily perform a process of filling a filler between the inner peripheral surface of the sleeve pipe and the insertion member in order to close the interval between the inner peripheral surface of the sleeve pipe and the insertion member, which makes the construction complicated.
For example, when the sleeve tube of Patent Document 1 is not made of a fire-resistant thermal expansion material, it is possible to wind a fire-resistant material such as rock wool or glass wool around the outer circumferential surface of the sleeve tube for the purpose of fire resistance, and then install the sleeve tube with the fire-resistant material wound around the outer circumferential surface in a through hole formed in a body. In this case, the interval between the circumferential surface of the through hole and the outer circumferential surface of the second sleeve tube becomes larger than the interval between the circumferential surface of the through hole and the outer circumferential surface of the first sleeve tube, so that it is necessary to set the thickness of the fire-resistant material provided on the outer circumferential surface of each sleeve tube to a different thickness according to each interval, and the fire-proofing work of providing the fire-resistant material on the outer circumferential surface of each sleeve tube becomes complicated and difficult. Furthermore, in this case, if a fire-resistant material such as rock wool or glass wool is provided on the threaded portion formed on the outer circumferential surface of the second sleeve tube, it may not be possible to screw the tube together, or the fire-resistant material may be damaged during the screwing. Therefore, the process of filling the fire-resistant material to close the interval between the circumferential surface of the through hole and the outer circumferential surface of the sleeve tube for the purpose of fire resistance cannot be performed reliably and easily, and the construction becomes complicated.
Furthermore, when the sleeve tube of Patent Document 1 is not made of a fire-resistant thermal expansion material, it is possible to wind a fire-resistant material such as rock wool or glass wool around the outer peripheral surface of the insertion member for the purpose of fire resistance, and install the insertion member with the fire-resistant material wound around the outer peripheral surface so as to penetrate the insertion hole of the sleeve tube. In this case, since it is necessary to make the insertion member penetrate the inside of the second sleeve tube with a small inner diameter, it is necessary to make the outer diameter dimension of the insertion member with the fire-resistant material wound around the outer peripheral surface smaller than the inner diameter of the second sleeve tube. Therefore, there is a possibility that the gap between the inner peripheral surface of the first sleeve tube, which has an inner diameter larger than the inner diameter of the second sleeve tube, and the fire-resistant material wound around the outer peripheral surface of the insertion member becomes large. Therefore, the process of filling the gap between the inner peripheral surface of the sleeve tube and the insertion member for the purpose of fire resistance cannot be performed reliably and easily, and the construction becomes complicated.
Therefore, in the sleeve pipe of Patent Document 1, in which the gap between the peripheral surface of the through hole and the outer peripheral surface of the sleeve pipe is not constant, and the gap between the outer peripheral surface of the insertion member and the inner peripheral surface of the sleeve pipe is not constant, in order to reliably and easily perform fireproofing between the peripheral surface of the through hole and the outer peripheral surface of the sleeve pipe, and between the inner peripheral surface of the sleeve pipe and the insertion member, one or more of the first sleeve pipe and the second sleeve pipe must be made of a fireproof thermal expansion material. However, there is a problem in that the sleeve pipe made of a fireproof thermal expansion material is expensive, and therefore the construction cost rises.
Furthermore, in the configuration of the sleeve pipe in Patent Document 1, the gap between the circumferential surface of the through hole and the outer peripheral surface of the sleeve pipe, and the gap between the outer peripheral surface of the insertion member and the inner peripheral surface of the sleeve pipe are not constant. Therefore, even if fireproofing treatment is not performed, in order to ensure stability after installation of the sleeve pipe and the insertion member, it is considered that processing for making the gap between the circumferential surface of the through hole and the outer peripheral surface of the sleeve pipe constant, or processing for making the gap between the outer peripheral surface of the insertion member and the inner peripheral surface of the sleeve pipe constant may be required, which may make construction complicated.
In other words, in the sleeve pipe of Patent Document 1, the gap between the circumferential surface of the through hole and the outer peripheral surface of the sleeve pipe, and the gap between the outer peripheral surface of the insertion member and the inner peripheral surface of the sleeve pipe are not constant, so that the process of filling these gaps with filler material, etc., is complicated, posing problems in terms of workability.
In view of the above-mentioned problems, the present invention aims to provide a sleeve that is inexpensive, can be used with bodies of different thicknesses, and has excellent workability by making it possible to maintain a constant distance between the outer surface of the sleeve and the outer surface of the through hole, as well as between the outer surface of the sleeve's insertion hole and the outer surface of the insertion member.

The sleeve according to the present invention is a sleeve that is attached to pass through a through hole formed to pass through a body, and has an insertion hole on the inside for passing an insertion member therethrough, and includes a first sleeve that is inserted into the through hole from one opening of the through hole, and a second sleeve that is inserted into the through hole from the other opening of the through hole, and in a state in which the first sleeve inserted into the through hole from one opening of the through hole and the second sleeve inserted into the through hole from the other opening of the through hole are joined to form the sleeve, the insertion hole of the sleeve is configured as an insertion hole having a circumferential surface of a constant diameter dimension continuously along the extension direction of the through hole, and the outer peripheral surface of the sleeve is configured as an outer peripheral surface of a constant diameter dimension continuously along the extension direction of the through hole , and the first sleeve is configured as an insertion hole having a circumferential surface of a constant diameter dimension continuously along the extension direction of the through hole. the second sleeve comprises an inner tubular portion having an outer circumferential surface and an inner circumferential surface which form the outer circumferential surface of the sleeve formed to a constant diameter dimension, and an inner tubular portion having an outer circumferential surface and an inner circumferential surface which have a constant diameter dimension smaller than the diameter dimension of the inner circumferential surface of the outer tubular portion; the second sleeve comprises an inner tubular portion having an inner circumferential surface and an outer circumferential surface which form the circumferential surface of the insertion hole formed to a constant diameter dimension continuously over the extension direction of the through hole, and an outer tubular portion having an inner circumferential surface and an outer circumferential surface which have a constant diameter dimension larger than the diameter dimension of the outer circumferential surface of the inner tubular portion; and the inner circumferential surface of the outer tubular portion of the first sleeve and the outer circumferential surface of the outer tubular portion of the second sleeve are joined together, and the inner circumferential surface of the inner tubular portion of the first sleeve and the outer circumferential surface of the inner tubular portion of the second sleeve are joined together, thereby forming a space surrounded by the first sleeve and the second sleeve on the outer circumferential side of the insertion hole .
According to the sleeve, it is possible to provide a sleeve that is inexpensive, can be used for bodies of different thicknesses, and has excellent workability by making the distance between the peripheral surface of the insertion hole of the sleeve and the peripheral surface of the insertion member, and the distance between the peripheral surface of the sleeve and the peripheral surface of the through hole, constant . In addition , by providing a fire-resistant material in the space surrounded by the first sleeve 2 and the second sleeve 3, it is possible to further improve the fire resistance .
Furthermore , the first sleeve is characterized in that it has a flange portion at its rear end which contacts a body surface located on the outer circumferential side of one opening of the through hole, and the second sleeve has a flange portion at its rear end which contacts a body surface located on the outer circumferential side of the other opening of the through hole.
With this sleeve, the sleeve can be easily and reliably installed in the through hole with the body sandwiched between the flange portion of the first sleeve and the flange portion of the second sleeve, and in the event of a fire, it is difficult for flames to penetrate between the sleeve and the through hole, thereby further improving fire resistance.

FIG. 4 is a cross-sectional view showing a sleeve attached to a through hole (first embodiment). FIG. 4 is a cross-sectional view showing a first sleeve and a second sleeve (first embodiment). FIG. 4 is an explanatory diagram showing an example of a method for installing a sleeve (first embodiment). FIG. 11 is a cross-sectional view showing a sleeve attached to a through hole (second embodiment).

EMBODIMENT 1
As shown in FIG. 1 , the sleeve 1 according to the first embodiment is attached to a through hole 11, e.g., having a circular cross section, formed to penetrate a framework 10 such as a wall, floor, beam, etc. of a structure such as a building, and is a tubular member, e.g., having a circular cross section, and provided with an insertion hole 13 on the inside for passing a tubular insertion member 12 therethrough.
The structure 10 is a fire-resistant wall having a fire-resistant coating layer 10b provided on the surface of a wooden wall 10a. The fire-resistant coating layer 10b is formed by laminating fire-resistant boards such as gypsum boards.
The insertion member 12 is, for example, a tubular member having a circular cross section, such as a water supply pipe, a refrigerant pipe, or an electrical conduit.

The sleeve 1 comprises a first sleeve 2 that is inserted into a through hole 11 formed in the body 10 from one opening 15 of the through hole 11, and a second sleeve 3 that is inserted into the through hole 11 from the other opening 16 of the through hole 11, and is configured by combining the first sleeve 2 and the second sleeve 3.

As shown in FIG. 1, when the first sleeve 2 inserted into the through hole 11 from one opening 15 of the through hole 11 and the second sleeve 3 inserted into the through hole 11 from the other opening 16 of the through hole 11 are joined to form the sleeve 1, the insertion hole 13 of the sleeve 1 facing the outer circumferential surface of the insertion member 12 is configured to have a continuous constant diameter dimension along the extension direction of the through hole 11, and the outer circumferential surface 14 of the sleeve 1 facing the outer circumferential surface of the through hole 11 is configured to have a continuous constant diameter dimension along the extension direction of the through hole 11.

As shown in Figs. 1 and 2, the first sleeve 2 is configured to include an outer tubular portion 20A, an inner tubular portion 20B, and a flange portion 20C.
FIG. 2 is a cross-sectional view showing the first sleeve 2 and the second sleeve 3 in a state before they are joined together.
In this specification, the radial dimension of each peripheral surface described later refers to the radial dimension from the central axis 11C of the first sleeve 2 to the peripheral surface, or the radial dimension from the central axis 11C of the second sleeve 3 to the peripheral surface.

The outer tubular portion 20A has an inner circumferential surface 21 and an outer circumferential surface 22 .
The inner surface 21 of the outer tubular portion 20A is composed of a tip side inner surface 21b, which is the side that is inserted first into the through hole 11 from one opening 15 of the through hole 11, and an inner surface 21a other than the tip side, and the diameter dimension of the tip side inner surface 21b is formed to be larger than the diameter dimension of the inner surface 21a other than the tip side.
When the first sleeve 2 and the second sleeve 3 are combined to form the sleeve 1, the outer peripheral surface 22 of the outer tubular portion 20A becomes the outer peripheral surface 14 of the sleeve 1 which is formed with a continuous, constant diameter dimension along the extension direction of the through hole 11.
The inner tubular portion 20B has an outer peripheral surface 23 and an inner peripheral surface 24 having a constant diameter dimension that is smaller than the diameter dimension of the inner peripheral surface 21 by, for example, several mm to several cm.

The flange 20C has an inner peripheral portion that serves as a blocking portion that blocks the gap between the rear end side of the outer tubular portion 20A and the rear end side of the inner tubular portion 20B, and an outer peripheral portion that functions as a flange having a plate surface 25 that contacts the body surface 17 located on the outer peripheral side of one opening 15 of the through hole 11. Note that the rear end of the outer tubular portion 20A and the rear end of the inner tubular portion 20B refer to the ends opposite the tip that is inserted first into the through hole 11.

In other words, the first sleeve 2 is configured by forming the outer tubular portion 20A, the inner tubular portion 20B, and the flange portion 20C integrally so that the outer tubular portion 20A and the inner tubular portion 20B are positioned coaxially and the space between the rear end side of the outer tubular portion 20A and the rear end side of the inner tubular portion 20B is blocked by the inner peripheral portion of the flange portion 20C. This results in a first sleeve 2 having a circular annular space portion at the rear end side surrounded by the inner plate surface of the flange portion 20C, the inner peripheral surface 21a of the outer tubular portion 20A, and the outer peripheral surface 23 of the inner tubular portion 20B, as shown in the cross-sectional shape of FIG. 2, and having a flange having a plate surface 25 that contacts the body surface 17.

As shown in Figs. 1 and 2, the second sleeve 3 is configured to include an outer tubular portion 30A, an inner tubular portion 30B, and a flange portion 30C.
The inner tubular portion 30B has an outer circumferential surface 31 and an inner circumferential surface 32 .
The outer peripheral surface 31 of the inner tubular portion 30B is composed of a tip side outer peripheral surface 31b, which is the side that is inserted first into the through hole 11 from the other opening 16 of the through hole 11, and an outer peripheral surface 31a other than the tip side, and the diameter dimension of the tip side outer peripheral surface 31b is formed to be smaller than the diameter dimension of the outer peripheral surface 31a other than the tip side.
When the first sleeve 2 and the second sleeve 3 are combined to form the sleeve 1, the inner surface 32 of the inner tubular portion 30B becomes the insertion hole 13 of the sleeve 1, which is formed with a continuous and constant diameter dimension along the extension direction of the through hole 11.
The outer tubular portion 30A has an inner circumferential surface 34 and an outer circumferential surface 33 having a constant diameter dimension that is larger than the diameter dimension of the outer circumferential surface 31 by, for example, several mm to several cm.

The flange 30C has an inner peripheral portion that serves as a blocking portion that blocks the gap between the rear end side of the inner tubular portion 30B and the rear end side of the outer tubular portion 30A, and an outer peripheral portion that functions as a flange having a plate surface 35 that contacts the body surface 17 located on the outer periphery side of the other opening 16 of the through hole 11. Note that the rear end of the inner tubular portion 30B and the rear end of the outer tubular portion 30A refer to the ends opposite the tip that is inserted first into the through hole 11.

In other words, the second sleeve 3 is configured by forming the outer tubular portion 30A, the inner tubular portion 30B, and the flange portion 30C integrally so that the outer tubular portion 30A and the inner tubular portion 30B are positioned coaxially and the space between the rear end side of the outer tubular portion 30A and the rear end side of the inner tubular portion 30B is blocked by the inner peripheral portion of the flange portion 30C. This results in the second sleeve 3 having a circular annular space portion at the rear end side surrounded by the inner plate surface of the flange portion 30C, the inner peripheral surface 34 of the outer tubular portion 30A, and the outer peripheral surface 31a of the inner tubular portion 30B, as shown in the cross-sectional shape of FIG. 2, and having a flange having a plate surface 35 that contacts the body surface 17.

Furthermore, the second sleeve 3 is installed in the through hole 11 so that the tip surface of the inner surface 32 of the inner tubular portion 30B of the second sleeve 3 and the outer plate surface of the flange portion 20C of the first sleeve 2 are positioned on the same plane, and one end opening of the insertion hole 13 is formed by the tip opening edge of the inner surface 32 of the inner tubular portion 30B.
The other end opening of the insertion hole 13 is formed by the rear edge of the inner circumferential surface 32 of the inner tubular portion 30B.

The tip side inner surface 21b of the outer tubular portion 20A of the first sleeve 2 and the outer surface 33 of the outer tubular portion 30A of the second sleeve 3 are configured to have threads 40 formed on circumferential surfaces of the same diameter, and the tip side outer surface 31b of the inner tubular portion 30B of the second sleeve 3 and the inner surface 24 of the inner tubular portion 20B of the first sleeve 2 are configured to have threads 40 formed on circumferential surfaces of the same diameter.
That is, the inner peripheral surface 21b at the tip end of the outer tubular portion 20A of the first sleeve 2 and the outer peripheral surface 33 of the outer tubular portion 30A of the second sleeve 3, which are joined to each other, are formed with threads 40, 40 that screw into each other.
The distal outer peripheral surface 31b of the inner tubular portion 30B of the second sleeve 3 and the inner peripheral surface 24 of the inner tubular portion 20B of the first sleeve 2, which are joined to each other, are formed with threads 40, 40 that screw together.

Then, the first sleeve 2 is installed in the through hole 11 from one opening 15 of the through hole 11, and the second sleeve 3 is installed in the through hole 11 from the other opening 16 of the through hole 11. At this time, the tip side inner circumferential surface 21b of the inner circumferential surface 21 of the outer tubular portion 20A of the first sleeve 2 and the outer circumferential surface 33 of the outer tubular portion 30A of the second sleeve 3 are screwed together, and the inner circumferential surface 24 of the inner tubular portion 20B of the first sleeve 2 and the tip side outer circumferential surface 31b of the inner tubular portion 30B of the second sleeve 3 are screwed together.
As a result of the above, as shown in Figure 1, a sleeve 1 is formed that penetrates through hole 11, with the outer peripheral surface 22 of the outer tubular portion 20A becoming the outer peripheral surface 14 and the inner peripheral surface 32 of the inner tubular portion 30B becoming the insertion hole 13.

When the sleeve 1 is constructed to pass through the through hole 11 as described above, the inner surface 21a other than the tip side of the outer tubular portion 20A of the first sleeve 2 and the inner surface 34 of the outer tubular portion 30A of the second sleeve 3 are formed into circumferential surfaces of the same diameter dimension.
Furthermore, the outer circumferential surface 31a of the inner tubular portion 30B of the second sleeve 3 other than the tip side and the outer circumferential surface 23 of the inner tubular portion 20B of the first sleeve 2 are formed into circumferential surfaces of the same diameter.
In addition, on the outer circumferential side of the insertion hole 13, a space is formed that is surrounded by the inner circumferential surface 21, the inner circumferential surface 34, the outer circumferential surface 31, the outer circumferential surface 23, the inner plate surface of the flange portion 20C, and the inner plate surface of the flange portion 30C, and this cylindrical space has a circular cross-section that is continuous in the extension direction of the through hole 11.

The first sleeve 2 and the second sleeve 3 are made of, for example, a cuttable metallic material.

Next, an example of a method for installing the sleeve 1 will be described with reference to FIGS.
The thickness of the frame 10 varies depending on, for example, the thickness of the fire-resistant coating layer 10b. Therefore, first, the first sleeve 2 is installed in the through hole 11, and at this time, the length dimension of the first sleeve 2 in the direction along the central axis 11C must be adjusted to the thickness dimension of the frame 10. That is, the first sleeve 2 is inserted into the through hole 11 from the tip side through one opening 15 of the through hole 11, and the plate surface 25 of the flange 20C is brought into contact with the frame surface 17 located on the outer circumferential side of one opening 15 of the through hole 11. In this state, a cutting mark line is made at the boundary position between the tip side portion of the outer tubular portion 20A protruding from the other opening 16 of the through hole 11 and the portion of the outer tubular portion 20A located within the through hole 11, as a mark for cutting the tip side portion of the outer tubular portion 20A. Next, the first sleeve 2 is temporarily removed from the through hole 11, and then the tip end portion of the outer tubular portion 20A, which will be the portion protruding from the other opening 16, is cut along the cutting marker line.
3(a), the first sleeve 2 with the tip end portion of the outer tubular portion 20A cut off is placed in the through hole 11, and then the second sleeve 3 is inserted into the through hole 11 from the tip end side via the other opening 16 of the through hole 11 as shown in FIG. 3(b). Then, the threads 40 formed on the tip end outer peripheral surface 31b of the inner tubular portion 30B of the second sleeve 3 are screwed together with the threads 40 formed on the inner peripheral surface 24 of the inner tubular portion 20B of the first sleeve 2, and the threads 40 formed on the outer peripheral surface 33 of the outer tubular portion 30A of the second sleeve 3 are screwed together with the threads 40 formed on the tip end inner peripheral surface 21b of the outer tubular portion 20A of the first sleeve 2, so that the plate surface 35 of the flange portion 30C is in contact with the body surface 17 located on the outer circumferential side of the other opening 16 of the through hole 11. In this state, a cutting mark line serving as a guide for cutting the tip side portion 30T of the inner tubular portion 30A is made at the boundary position between the tip side portion 30T of the inner tubular portion 30A protruding from one opening 15 of the through hole 11 and the portion of the inner tubular portion 30A located within the through hole 11. Next, the second sleeve 3 is temporarily removed from inside the through hole 11, and then the tip side portion 30T of the inner tubular portion 30A, which will be the portion protruding from one opening 15, is cut along the cutting mark line.
Next, with a predetermined amount of fire-resistant material 9 such as rock wool or glass wool provided on the outer periphery of the inner tubular portion 30A of the second sleeve 3 having the tip portion 30T of the inner tubular portion 30A cut off, the second sleeve 3 is inserted into the through hole 11 from the tip side through the other opening 16 of the through hole 11.
Then, as shown in FIG. 1 , a thread 40 formed on the tip side outer peripheral surface 31 b of the inner tubular portion 30B of the second sleeve 3 is screwed into a thread 40 formed on the inner peripheral surface 24 of the inner tubular portion 20A of the first sleeve 2, and a thread 40 formed on the outer peripheral surface 33 of the outer tubular portion 30A of the second sleeve 3 is screwed into a thread 40 formed on the tip side inner peripheral surface 21 b of the outer tubular portion 20A of the first sleeve 2, thereby joining the second sleeve 3 and the first sleeve 2, and the sleeve 1 is installed in the through hole 11.
Thereafter, the insertion member 12 is placed so as to pass through the insertion hole 13 of the sleeve 1 placed in the through hole 11 .

The sleeve 1 according to the first embodiment is inexpensive, can be used with bodies 10 of different thicknesses, and can maintain constant the gap between the peripheral surface of the insertion hole 13 of the sleeve 1 and the peripheral surface of the insertion member 12, and the gap between the peripheral surface 14 of the sleeve 1 and the peripheral surface of the through hole 11. This allows a sleeve 1 to be provided that can reliably and easily be filled with a fire-resistant material or the like as a filler to close the gap between the sleeve 1 and the insertion member 12, and the gap between the sleeve 1 and the through hole 11. In other words, a sleeve 1 with excellent workability can be provided.

That is, in the sleeve 1 of embodiment 1, the insertion hole 13 facing the outer peripheral surface of the inserting member 12 is configured as a through hole having a peripheral surface (inner peripheral surface 32) of a continuous and constant diameter dimension along the extension direction of the through hole 11.
Therefore, the distance between the insertion hole 13 of the sleeve 1 and the insertion member 12 can be set to a constant and even gap along the extension direction of the through hole, so that by wrapping a fire-resistant material such as rock wool or glass wool around the outer surface of the insertion member 12 to a constant thickness, the process of filling the gap between the insertion hole 13 of the sleeve 1 and the insertion member 12 with a fire-resistant material or the like as a filler can be performed reliably and easily.
In addition, in the sleeve 1 of embodiment 1, the outer peripheral surface 14 of the sleeve 1 that faces the peripheral surface of the through hole 11 is configured as an outer peripheral surface (outer peripheral surface 22) of a continuous, constant diameter dimension along the extension direction of the through hole 11.
Therefore, the distance between the outer peripheral surface 14 of the sleeve 1 and the through hole 11 can be set to a constant and even gap along the extension direction of the through hole 11. Therefore, by wrapping a fire-resistant material such as rock wool or glass wool around the outer peripheral surface 14 of the sleeve 1 to a constant thickness, the process of filling the gap between the outer peripheral surface 14 of the sleeve 1 and the through hole 11 with a fire-resistant material or the like as a filler can be performed reliably and easily.

In other words, with the sleeve 1 according to embodiment 1, the distance between the sleeve 1 and the insertion member 12, and the distance between the sleeve 1 and the through hole 11 can be made constant, making it possible to provide a sleeve 1 with excellent workability.

Furthermore, in the sleeve 1 according to the first embodiment, the first sleeve 2 and the second sleeve 3 are joined together to form a cylindrical space with a circular cross section surrounded by the first sleeve 2 and the second sleeve 3. Therefore, for example, by providing a fire-resistant material 9 such as rock wool or glass wool (see FIG. 1) in the cylindrical space, it is possible to improve the fire resistance.

In addition, in the sleeve 1 of embodiment 1, the first sleeve 2 is provided at its rear end with a flange portion 20C that functions as a flange having a plate surface 25 that contacts the body surface 17 located on the outer periphery of one opening 15 of the through hole 11, and the second sleeve 3 is provided at its rear end with a flange portion 30C that functions as a flange having a plate surface 35 that contacts the body surface 17 located on the outer periphery of the other opening 16 of the through hole 11.
As a result, the sleeve 1 can be reliably and easily installed in the through hole 11 with the main body 10 sandwiched between the flange portions 20C and 30C, and in the event of a fire, flames are less likely to penetrate between the sleeve 1 and the through hole 11, thereby improving fire resistance.

EMBODIMENT 2
As shown in Figure 4, the sleeve 1A of embodiment 2 comprises a first sleeve 2A that is inserted into a through hole 11 formed in a body 10 from one opening 15 of the through hole 11, and a second sleeve 3A that is inserted into the through hole 11 from the other opening 16 of the through hole 11, and is formed by combining the first sleeve 2A and the second sleeve 3A.
In FIG. 4 showing the configuration of the second embodiment, the same or corresponding parts as those in FIGS. 1 to 3 showing the configuration of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The first sleeve 2A has an inner circumferential surface 22A on the tip side, which is the side that is inserted first into the through hole 11 from one opening 15 of the through hole 11, formed to have a larger diameter dimension than the inner circumferential surface 21A other than the tip side, and has an outer circumferential surface 23A with a constant diameter dimension.
That is, the inner circumferential surface of the first sleeve 2A is composed of a tip side inner circumferential surface 22A and an inner circumferential surface 21A other than the tip side.
The first sleeve 2A has at its rear end a flange portion 2C having a plate surface 25 that contacts the body surface 17 located on the outer circumferential side of one of the openings 15 .

The second sleeve 3A has an inner circumferential surface 31A having a constant diameter dimension, and the diameter dimension of the outer circumferential surface 32A on the tip side, which is the side that is inserted first into the through hole 11 from the other opening 16 of the through hole 11, is formed to be smaller than the diameter dimension of the outer circumferential surface 33A other than the tip side.
That is, the outer circumferential surface of the second sleeve 3A is composed of a tip side outer circumferential surface 32A and an outer circumferential surface 33A other than the tip side.
The rear end of the second sleeve 3A is provided with a flange portion 3C having a plate surface 35 that contacts the body surface 17 located on the outer circumferential side of the other opening 16.

Threads 40, 40 that screw together are formed on the inner peripheral surface 22A at the tip end of the first sleeve 2A and the outer peripheral surface 32A at the tip end of the second sleeve 3.

Then, the tip side inner circumferential surface 22A of the first sleeve 2A inserted from one opening 15 of the through hole 11 and the tip side outer circumferential surface 32A of the second sleeve 3A inserted from the other opening 16 of the through hole 11 are screwed together within the through hole 11 to form the sleeve 1A.

That is, a thread 40 formed on the tip side inner surface 22A of the first sleeve 2A inserted from one opening 15 of the through hole 11 and a thread 40 formed on the tip side outer surface 32A of the second sleeve 3A inserted from the other opening 16 are screwed together, so that a tip surface 24x of the outer surface 23A of the first sleeve 2A and a tip surface 34x of the outer surface 33A other than the tip side of the second sleeve 3A are brought into close proximity, and a tip surface 25x of the inner surface 21A other than the tip side of the first sleeve 2A and a tip surface 35x of the inner surface 31A of the second sleeve 3 are brought into close proximity, thereby screwing together the first sleeve 2A and the second sleeve 3A. In other words, the outer peripheral surface 14A of the sleeve 1A facing the peripheral surface of the through hole 11 is formed by the outer peripheral surface 23A of the first sleeve 2A and the outer peripheral surface 33A other than the tip side of the second sleeve 3A, and the insertion hole 13A of the sleeve 1A is formed by the inner peripheral surface 21A of the first sleeve 2A other than the tip side and the inner peripheral surface 31A of the second sleeve 3A.
That is, by screwing the tip side inner surface 22A of the first sleeve 2A and the tip side outer surface 32A of the second sleeve 3A within the through hole 11, the outer surface 23A of the first sleeve 2A and the outer surface 33A other than the tip side of the second sleeve 3A form the outer surface 14A of the sleeve 1A having a continuous and constant diameter dimension along the extension direction of the through hole 11, and the inner surface 21A of the first sleeve 2A other than the tip side and the inner surface 31A of the second sleeve 3A form the insertion hole 13A of the sleeve 1A having a continuous and constant diameter dimension along the extension direction of the through hole 11.

In other words, the peripheral surface of the insertion hole 13A of the sleeve 1A is configured to be positioned on a peripheral surface of the same diameter centered on the central axis 11C of the sleeve 1A continuously along the extension direction of the through hole 11, and the outer peripheral surface 14A of the sleeve 1A is configured to be positioned on a peripheral surface of the same diameter centered on the central axis 11C of the sleeve 1A continuously along the extension direction of the through hole 11.

Note that in the second embodiment, the meaning of the term "close" mentioned above includes cases where the objects are in contact.

The first sleeve 2A and the second sleeve 3A are also made of, for example, a cuttable metallic material.

According to the sleeve 1A of embodiment 2, if it is found at the site that the length of the sleeve 1A is longer than the thickness dimension of the structure 10, it is possible to shorten the length of the sleeve 1A to match the thickness dimension of the structure 10 by cutting both the tip side of the first sleeve 2A and the tip side of the second sleeve 3A to the same length.
Also, the first sleeve 2A may be shortened and the second sleeve 3A may be lengthened, and only the tip side of the second sleeve 3A may be cut off.

According to the sleeve 1A of embodiment 2, the distance between the peripheral surface of the insertion hole 13A of the sleeve 1A and the outer peripheral surface of the inserting member 12 can be set to an even gap along the extension direction of the through hole 11. Therefore, by wrapping a fire-resistant material such as rock wool or glass wool to a certain thickness around the outer peripheral surface of the inserting member 12, a sleeve 1A with excellent workability can be provided in which a process of filling the gap between the insertion hole 13 of the sleeve 1 and the inserting member 12 with a fire-resistant material or the like can be performed reliably and easily.
Furthermore, by setting the diameter of the outer circumferential surface 14A of the sleeve 1A to a dimension corresponding to the diameter of the circumferential surface of the through hole 11, it is possible to eliminate the space between the outer circumferential surface 14A and the through hole 11 for filling with a fire-resistant material or the like as a filler. In this case, it is possible to provide a sleeve 1A that can be used even when fire resistance between the outer circumferential surface 14A and the through hole 11 is not required.
In other words, according to the sleeve 1A of embodiment 2, the distance between the sleeve 1A and the insertion member 12, and the distance between the sleeve 1A and the through hole 11 can be made constant, making it possible to provide a sleeve 1A with excellent workability.

In addition, the sleeve 1A can be securely and easily installed in the through hole 11 with the body 10 sandwiched between the flanges 2C and 3C, and in the event of a fire, it is difficult for flames to penetrate between the sleeve 1A and the through hole 11, improving fire resistance.

In addition, in the sleeve 1A according to embodiment 2, if the gap between the insertion hole 13A of the sleeve 1A and the insertion member 12 or the gap between the outer circumferential surface 14A of the sleeve 1A and the through hole 11 becomes large, or if it is desired to further improve the fire resistance, a fire-resistant material such as glass wool, rock wool, fire-resistant tape, or fire-resistant sheet can be wound to a certain thickness around the outer circumferential surface 14A of the sleeve 1A or the outer circumferential surface of the insertion member 12, so that the process of filling the gap between the sleeve 1A and the insertion member 12 and the gap between the sleeve 1A and the through hole 11 with a fire-resistant material as a filler can be performed reliably and easily.

In addition, in the sleeve 1 of embodiment 1, a configuration has been exemplified in which the second sleeve 3 and the first sleeve 2 are joined by screwing the threads 40 formed on the tip side outer peripheral surface 31b of the inner tubular portion 30B of the second sleeve 3 to the inner peripheral surface 24 of the inner tubular portion 20A of the first sleeve 2, and by screwing the threads 40 formed on the outer peripheral surface 33 of the outer tubular portion 30A of the second sleeve 3 to the tip side inner peripheral surface 21b of the outer tubular portion 20A of the first sleeve 2. However, a configuration may also be used in which the tip side outer peripheral surface 31b of the inner tubular portion 30B of the second sleeve 3 is joined to the inner peripheral surface 24 of the inner tubular portion 20A of the first sleeve 2 in an engaged state, and the outer peripheral surface 33 of the outer tubular portion 30A of the second sleeve 3 is joined to the tip side inner peripheral surface 21b of the outer tubular portion 20A of the first sleeve 2 in an engaged state.
In addition, in the sleeve 1A of embodiment 2, a sleeve 1 has been exemplified in which the tip side inner circumferential surface 22A of the first sleeve 2A and the tip side outer circumferential surface 32A of the second sleeve 3A are screwed together, but the tip side inner circumferential surface 22A of the first sleeve 2A and the tip side outer circumferential surface 32A of the second sleeve 3A may be joined in an interlocking state.
In addition, in the configuration in which these components are joined in a fitted state, a fitting joint structure may be used in which the mating surfaces are provided with projections and recesses to prevent rotation.

In addition, in the sleeve 1A of the second embodiment, if fireproofing is required between the tip surface 24x of the outer peripheral surface 23A of the first sleeve 2A and the tip surface 34x of the outer peripheral surface 33A other than the tip side of the second sleeve 3A, or between the tip surface 25x of the inner peripheral surface 21A other than the tip side of the first sleeve 2A and the tip surface 35x of the inner peripheral surface 31A of the second sleeve 3A, for example, a fireproof material such as glass wool, rock wool, fireproof tape, or fireproof sheet may be attached to at least one of the opposing tip surfaces, and the tip side inner peripheral surface 22A of the first sleeve 2A and the tip side outer peripheral surface 32A of the second sleeve 3A may be joined so that the opposing tip surfaces are butted against each other via the fireproof material.

In addition, in the first and second embodiments, the first sleeve 2 in FIG. 1 and 2A in FIG. 4 are first installed in the through hole 11, and then the second sleeve 3 in FIG. 1 and 3A in FIG. 4 are installed in the through hole 11, and the two are joined to form the sleeve 1 in FIG. 1 and 1A in FIG. 4. However, the second sleeve 3 and 3A may be first installed in the through hole 11, and then the first sleeve 2 and 2A may be installed in the through hole 11, and the two may be joined to form the sleeve 1 and 1A.

In addition, in embodiments 1 and 2, when a first sleeve 2, 2A inserted into the through hole 11 from one opening 15 of the through hole 11 and a second sleeve 3, 3A inserted into the through hole 11 from the other opening 16 of the through hole 11 are combined to form the sleeve 1, 1A, the insertion hole 13, 13A of the sleeve 1 that faces the outer peripheral surface of the inserting member 12 is configured as an insertion hole 13 having a circumferential surface of a constant diameter dimension along the extension direction of the through hole 11, and the outer peripheral surface 14, 14A of the sleeve 1, 1A that faces the circumferential surface of the through hole 11 is configured as an outer circumferential surface of a constant diameter dimension along the extension direction of the through hole 11.
However, the sleeve of the present invention may be a sleeve that satisfies the condition that the insertion hole facing the outer peripheral surface of the insertion member is configured as an insertion hole having a peripheral surface with a continuous constant diameter dimension along the extension direction of the through hole, but does not satisfy the condition that the outer peripheral surface facing the peripheral surface of the through hole is configured as an outer peripheral surface with a continuous constant diameter dimension along the extension direction of the through hole.
Even with a sleeve of this configuration, the distance between the peripheral surface of the sleeve's insertion hole and the outer peripheral surface of the insertion member can be made constant, making it possible to obtain a sleeve that is inexpensive, can be used with bodies of different thicknesses, and is easy to install.
Conversely, the sleeve may satisfy the condition that the outer peripheral surface facing the peripheral surface of the through hole is configured as an outer peripheral surface with a continuous constant diameter dimension along the extension direction of the through hole, but does not satisfy the condition that the insertion hole facing the outer peripheral surface of the inserting member is configured as an insertion hole having a peripheral surface with a continuous constant diameter dimension along the extension direction of the through hole.
Even with a sleeve of this configuration, the distance between the outer peripheral surface of the sleeve and the outer peripheral surface of the through hole can be made constant, making it possible to obtain a sleeve that is inexpensive, can be used with structures of different thicknesses, and has excellent workability.

In addition, in the first and second embodiments, sleeves 1 and 1A having a circular cross section are illustrated, but the sleeve of the present invention is not limited to a circular cross section, and may be, for example, an angular cross section, as long as it is a sleeve formed by fitting and joining a first sleeve and a second sleeve.

In the above, a fire-resistant structural wall is exemplified as the skeleton 10, but the skeleton may be a fire-resistant structural floor, a fire-resistant structural beam, or the like.
Furthermore, the structure 10 may be a structure such as a wall, a floor, or a beam in a wooden or steel frame structure, the surface of which is not provided with a fire-resistant coating layer.
Furthermore, the structure 10 may be a structure such as a wall, a floor, or a beam of a reinforced concrete structure.

Furthermore, when the sleeve of the present invention is used to pass through a through hole formed to pass through a wall, floor, beam, or other structural member not provided with a fire-resistant coating layer on its surface, the sleeve may be made of a cuttable material, such as plastic or wood.
In this sleeve, the insertion hole facing the outer circumferential surface of the insertion member is configured as an insertion hole having a circumferential surface with a continuous constant diameter dimension along the extension direction of the through hole, or the outer circumferential surface facing the circumferential surface of the through hole is configured as an outer circumferential surface with a continuous constant diameter dimension along the extension direction of the through hole, so that the distance between the insertion hole of the sleeve and the insertion member and the distance between the outer circumferential surface of the sleeve and the through hole can be made constant. Therefore, for example, a process of filling a filler material to close the gap between the sleeve and the insertion member or the gap between the sleeve and the through hole can be reliably and easily performed or such a process can be eliminated, i.e., a sleeve with excellent workability can be provided.

In addition, the sleeve according to the present invention can maintain a constant distance between the periphery of the through hole and the outer peripheral surface of the sleeve, and between the outer peripheral surface of the insertion member and the inner peripheral surface of the sleeve. This makes it easy to process even when such processing is required to ensure stability after installation of the sleeve or insertion member, resulting in a sleeve with excellent workability.

1, 1A sleeve, 2, 2A first sleeve, 3, 3A second sleeve,
10 body, 11 through hole, 12 insertion member, 13, 13A insertion hole,
15 one opening, 16 other opening, 20A, 30A outer tubular portion,
20B, 30B inner tubular part, 20C, 30C, 2C, 3C collar part,
22A inner circumferential surface on the tip side, 32A outer circumferential surface on the tip side.

Claims (2)

A sleeve is attached to a through hole formed to penetrate a body and has an insertion hole for passing an insertion member therethrough,
a first sleeve inserted into the through hole from one opening of the through hole, and a second sleeve inserted into the through hole from the other opening of the through hole,
When a first sleeve is inserted into a through hole from one opening of the through hole and a second sleeve is inserted into the through hole from the other opening of the through hole and combined to form a sleeve, the insertion hole of the sleeve is configured as an insertion hole having a peripheral surface with a constant diameter dimension continuously along the extension direction of the through hole, and the outer peripheral surface of the sleeve is configured as an outer peripheral surface with a constant diameter dimension continuously along the extension direction of the through hole ,
the first sleeve comprises an outer tubular portion having an outer circumferential surface and an inner circumferential surface that form an outer circumferential surface of the sleeve that is formed to have a constant diameter dimension continuously along an extension direction of the through hole, and an inner tubular portion having an outer circumferential surface and an inner circumferential surface that have a constant diameter dimension smaller than the diameter dimension of the inner circumferential surface of the outer tubular portion;
the second sleeve includes an inner tubular portion having an inner peripheral surface and an outer peripheral surface that form a peripheral surface of an insertion hole that is formed with a constant diameter dimension continuously along an extension direction of the through hole, and an outer tubular portion having an inner peripheral surface and an outer peripheral surface that have a constant diameter dimension larger than the diameter dimension of the outer peripheral surface of the inner tubular portion,
A sleeve characterized in that the inner surface of the outer tubular portion of the first sleeve is joined to the outer surface of the outer tubular portion of the second sleeve, and the inner surface of the inner tubular portion of the first sleeve is joined to the outer surface of the inner tubular portion of the second sleeve, thereby forming a space surrounded by the first sleeve and the second sleeve on the outer periphery of the insertion hole . the first sleeve has a flange at a rear end thereof which is in contact with a body surface located on an outer circumferential side of one opening of the through hole;
2. The sleeve according to claim 1 , wherein the second sleeve is provided at a rear end with a flange portion that contacts a body surface located on an outer circumferential side of the other opening of the through hole.

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