JP5371654B2 - Fixing tool for fireproof sleeve and fixing method for fireproof sleeve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing technology for surely and firmly fixing a fireproof sleeve with high work efficiency into a through hole that the fireproof sleeve penetrates. <P>SOLUTION: This fixture 10 for the fireproof sleeve includes a mounting part 20 for mounting the fixture to the outer peripheral surface of the fireproof sleeve 70, and a holding part 30 turnably provided at the mounting part 20 and holding the outer edge of the through hole so as to clamp it from both sides. The holding part 30 is formed in substantially U-shape, and includes a handle part 32. Abutting surfaces at the tip of the holding part 30 are provided with protrusions 33 protruded inward. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a fixing technique for fixing a fireproof sleeve to a through-hole through which the fireproof sleeve passes.

The “fireproof sleeve” is a metal tube that is inserted into a through-hole of a steel structure and is coated with a refractory material. Conventionally, there are the following Patent Documents 1 and 2 as prior arts related to a fixing technique for fixing a sleeve material (duct) that is inserted into a through hole of a steel structure.
Patent Document 1 discloses a fire-resistant sleeve 1 having a sleeve tube 3 that forms an insertion space, an annular refractory material 5 that is attached to the outer periphery of the sleeve tube 3 and closes the gap between the outer periphery of the sleeve tube 3 and the beam opening 11. An annular protective cover 9 provided on the outer periphery of the refractory material 5 to be in contact with the beam opening 11 to protect the refractory material 5 and a plurality of the protective cover 9 provided in the circumferential direction on the outer peripheral surface of the protective cover 9 By having the free claw part 19, the support metal fitting 13 which clamps the edge part of the beam opening 11 from both sides by the claw part 19 is provided (a code | symbol is a thing of patent document 1).

  Patent Document 2 discloses a duct insertion sleeve (fireproof sleeve) 20 that is fixed between a sleeve main body through which a duct is inserted and a circumferential direction of the outer periphery of the sleeve main body at a predetermined interval. And a plurality of spacers 26 for holding the sleeve body in the through hole by engagement, and a pair of claws 32a and 32b sandwiching both side surfaces near the through hole are provided at the tip of the support plate portion 30 of the spacer. It is formed (the symbol is that of Patent Document 2).

JP-A-9-1111913 JP-A-9-242214

  In the case of the support metal fitting 13 described in Patent Document 1, the fireproof sleeve 1 is attached to the beam 21 by raising only the claw portion 19a that abuts on one surface of the beam 21 in advance, and the fireproof sleeve 1 in this state. By inserting from one side of the beam opening 11 and bringing the claw portion 19a into contact with one surface of the beam 21, the other claw portion 19b is raised and the edge of the beam opening 11 is clamped from both sides. (Same specification [0009]).

  However, in the attachment method using the support metal fitting 13 of Patent Document 1, the side where the fireproof sleeve 1 is inserted is different from the side where the claw portion 19b is raised. For this reason, when there is one worker, it is necessary to move the place after inserting the fireproof sleeve 1 and perform the standing work of the claw portion 19b. Further, in order to eliminate the movement of the worker's place, one worker is required on each of the insertion work side of the fireproof sleeve 1 and the standing work side of the claw portion 19b. Therefore, a work burden or work cost is required.

  On the other hand, in the case of the spacer 26 described in Patent Document 2, the spacer 26 can be sandwiched between both sides near the through hole 12 from the side where the duct insertion sleeve (fireproof sleeve) 20 is inserted. However, after the insertion of the duct insertion sleeve (fireproof sleeve) 20 into the through hole 12, the spacer 26 needs to bend the pair of support plate portions 30 into an inverted C shape and sandwich both side surfaces near the through hole.

  However, in this bending method, it cannot be said that the duct insertion sleeve (fireproof sleeve) 20 is “fixed” to the through-hole 12 but is “supported”. This point is the same as in Patent Document 1 (the claw portion 19a is brought into contact with one surface of the beam 21 and then the other claw portion 19b is erected), and the fire-resistant sleeve 1 is opened to the beam (through hole) 11. It cannot be said to be “fixed”, but is “supported”.

  Therefore, the inventor of the present application has completed the present invention in order to provide a fixing technique for securely and firmly fixing the fireproof sleeve to the through-hole through which the fireproof sleeve passes.

In order to achieve the above object, a first invention is a fixture for fixing a fireproof sleeve to a through-hole through which the fireproof sleeve passes, and an attachment portion for attaching the fixture to the outer peripheral surface of the fireproof sleeve. And a holding part for holding the outer edge of the through-hole so as to hold the outer edge of the through-hole from both sides.
According to a second aspect of the present invention, there is provided the fireproof sleeve fixture according to the second aspect, wherein the sandwiching portion is formed in a substantially U shape.
According to a third aspect of the present invention, there is provided the fireproof sleeve fixing tool according to the present invention, wherein the gripping portion is provided with a handle portion that can hold the finger.
According to a fourth aspect of the present invention, there is provided the fire sleeve fixing device according to claim 1, wherein a protrusion is provided on the contact surface of the holding portion that contacts the outer edge of the through hole.
According to a fifth aspect of the present invention, there is provided the refractory sleeve fixture according to the fifth aspect, wherein the holding portion includes an extending member extending toward the anti-refractory sleeve.
6th invention is the fixing method for fixing a fireproof sleeve to the through-hole which a fireproof sleeve penetrates, Comprising: The attachment for attaching the fixing tool for fireproof sleeves for fixing a fireproof sleeve to the outer peripheral surface of a fireproof sleeve A process and a penetration that penetrates the fire-resistant sleeve into the through-hole in a state in which a substantially U-shaped sandwiching portion that is rotatably provided on the fixture for the fire-resistant sleeve and sandwiches the outer edge of the through-hole from both sides And a fixing step of holding the outer edge of the through hole so as to sandwich the outer edge of the through hole from both sides. It is.

The present invention has the following effects.
(1) When penetrating the fire-resistant sleeve into the through-hole, it can be smoothly penetrated by tilting the clamping part, and the clamping part stands up from both sides by raising the clamping part after penetrating the through-hole. The fireproof sleeve can be easily and reliably fixed to the through hole.
(2) By operating (turning) one of the pair of holding pieces constituting the substantially U-shaped holding portion, the other holding piece operates (turns) in the same manner in conjunction with this. The fireproof sleeve can be securely fixed by the operation (rotation) of only one of the sandwiching pieces.
(3) By providing the grip portion with a handle portion, the grip portion can be easily and reliably rotated.
(4) Providing the projecting portion in the sandwiching portion makes the projecting portion act as a return, and the retaining portion sufficiently locks with the outer edge of the through hole, so that the fireproof sleeve can be securely fixed to the through hole. .
(5) Since the extending member is provided in the holding portion, the height adjustment for the holding portion to hold the outer edge of the through hole becomes possible.
(6) The workability (constructability) of the fireproof sleeve is remarkably improved because the sandwiched portion that lies down from the insertion side of the fireproof sleeve into the through hole can be raised.

Explanatory drawing (fixture) which shows 1st Embodiment of this invention. Explanatory drawing (fixture) which shows 1st Embodiment of this invention. Explanatory drawing which shows 1st Embodiment of this invention (fixing method). Explanatory drawing which shows 1st Embodiment of this invention (use condition). Explanatory drawing (fixture) which shows 1st Embodiment of this invention. Explanatory drawing (fixture) which shows 2nd Embodiment of this invention. Explanatory drawing (fixture) which shows 2nd Embodiment of this invention. Explanatory drawing which shows 2nd Embodiment of this invention (use condition). Explanatory drawing which shows 3rd Embodiment of this invention (use condition).

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing a first embodiment of the present invention, and is a perspective view showing a fireproof sleeve fixing tool (hereinafter referred to as “fixing tool”). The fixture 10 shown in FIG. 1 is provided with an attachment portion 20 for attaching the fixture 10 to the outer peripheral surface of the fireproof sleeve, and is rotatably provided to the attachment portion 20 so as to sandwich the outer edge of the through hole from both sides. A clamping unit 30 for clamping is provided. The attachment portion 20 includes attachment portion main bodies 21 and 21 having attachment holes 22 for attachment to the outer peripheral surface of the fireproof sleeve, and the clamping portion 30 is rotatable so as to connect the pair of left and right attachment portion main bodies 21 and 21. Is provided.

  The clamping part 30 is formed in a substantially U shape, and the bottom part thereof is rotatably connected to the attachment part main bodies 21 and 21. The substantially U-order shape of the clamping part 30 is a taper shape which becomes narrow toward the front end side. In addition, the contact surface at the tip that comes into contact with the outer edge of the through hole is provided with a protrusion 33 that protrudes inward. The projecting portion 33 plays a role of “returning”, and the holding portion 30 is sufficiently locked with the outer edge of the through hole, so that the fireproof sleeve can be securely fixed to the through hole.

  In addition, the clamping part 30 includes a pair of handle parts 32, 32 on the left and right clamping pieces 31, 31. The handle portion 32 can be hooked with a finger, and the rotation of the holding portion 30 is easy and reliable. At this time, since the clamping part 30 is substantially U-shaped, if it operates with one handle part 32, the clamping part 30 can be rotated (it is not necessary to operate both the handle parts 32 and 32). Further, the pinching piece 31 has a perforation 34 so that it can be used for fixing to the outer edge of the through hole.

  FIG. 2 is a perspective view showing the fixture 10 as in FIG. If the fixture 10 is not attached to the fireproof sleeve, it can be rotated 360 degrees. Even when attached to the fireproof sleeve, it can move 180 degrees. FIG. 2 shows a state in which the fixture 10 is rotated 90 degrees backward from the state of FIG. Although not shown, the fixture 10 can be rotated 90 degrees forward from the state of FIG. By laying down the fixture 10 as shown in FIG. 2, the fireproof sleeve can be inserted into the through hole.

FIG. 3 shows a fixing method of the fireproof sleeve using the fixing tool of FIGS. 1 and 2.
(A) In order to fix the fireproof sleeve 70 (e.g., a galvanized steel sheet spiral duct having a length of 20 to 80 cm around which a fireproof coating material is wound and fixed with a fixing pin) to the through hole 81 of the steel beam 80 or the like, First, the fixing tool 10 is attached to the outer peripheral surface of the fireproof sleeve 70, and the fixing tool 10 is brought into a sideways state (FIG. 2 and the like).
(B) The fireproof sleeve 70 is passed through the through hole 81 while the fixture 10 is in the sideways state. At this time, even if the fixture 10 protrudes somewhat from the outer peripheral surface of the fireproof sleeve 70, the fireproof covering material constituting the fireproof sleeve 70 is flexible, so the fixture 10 sinks to the fireproof sleeve 70 side and fireproof. The penetration of the sleeve 70 is not hindered.
(C) The holding portion 30 that has been laid down from the insertion side of the fireproof sleeve 70 into the through hole 81 is raised to hold the outer edge of the through hole 81 from both sides. Since the operation of rotating (standing) the holding portion 30 can be performed from the insertion side of the fireproof sleeve 70, the inserter of the fireproof sleeve 70 can perform the rotating (standing) operation of the holding portion 30 as it is, which is extremely efficient.

  FIG. 4 is a cross-sectional view showing a use state of the fixture of FIGS. 1 and 2, that is, the state of FIG. In FIG. 4, the fixture 10 is attached to the outer peripheral surface of a fireproof sleeve 70 in which a fireproof coating material 72 is wound around a sleeve material 71 such as a spiral duct, and the sandwiching portion 30 sandwiches the outer edge of the through hole 81 from both sides. It is pinched. In addition, the contact surface at the tip of the holding piece 31 is provided with a protrusion 33 that protrudes inward. The protrusion 33 plays a role of “returning”, and the refractory sleeve 70 can be reliably fixed to the through hole 81 by sufficiently locking the holding part 30 and the outer edge of the through hole.

FIG. 5 is an explanatory view (front view) showing another fixture according to the first embodiment.
The fixing device 11 shown in FIG. 5 includes an extending member 35 that is inside the holding portion 30 and slides on the holding pieces 31 and 31 and moves upward (on the side of the anti-fireproof sleeve). The extending member 35 is a so-called height adjusting member. By providing this, the height (length) necessary for the holding portion 30 to hold the outer edge of the through hole 81 can be freely adjusted. In addition, since the fixture 11 is the same as the fixture 10 shown in FIG.1 and FIG.2 about another point, the description is abbreviate | omitted.

FIG. 6 is an explanatory view showing a second embodiment of the present invention, and is a perspective view showing a fixture.
Unlike the fixture of the first embodiment, the fixture 40 shown in FIG. 6 is a fixture for fixing a fireproof sleeve inserted through a through-hole formed in a thick steel plate or the like, and therefore sandwiches the thick steel plate or the like. It has a structure that can be. That is, the structure of the attachment portion 50 is the same as that of the fixture 10 of the first embodiment, but the structure of the clamping portion 60 is different from that of the fixture 10 of the first embodiment.

  The clamping part 60 of the fixture 40 shown in FIG. 6 is formed wide to sandwich a thick steel plate and the like, and the left and right clamping pieces 61, 61 are formed straight and parallel. The reason why the left and right holding pieces 61 and 61 are not formed in a tapered shape like the fixing tool 10 of the first embodiment is that the left and right holding pieces 61 and 61 can be fixed by using a fastener such as a screw. Because. Moreover, when fixing the clamping part 60 and a thick steel plate with a screw etc., since a fastener can be used as a handle, it is not necessary to provide a handle part like 1st Embodiment.

  FIG. 7 is a perspective view showing the fixture 40 as in FIG. If the fixture 40 is not attached to the fireproof sleeve, it can be rotated 360 degrees. Even when attached to the fireproof sleeve, it can move 180 degrees. FIG. 6 shows a state in which the fixture 40 is rotated 90 degrees backward from the state of FIG. Although not shown, the fixture 40 can also be rotated 90 degrees forward from the state of FIG. By laying down the fixture 40 as shown in FIG. 7, the fireproof sleeve can be inserted into the through hole.

  FIG. 8 is a cross-sectional view showing a use state of the fixture of FIGS. 6 and 7. In FIG. 8, the fixture 40 is attached to the outer peripheral surface of a fireproof sleeve 70 in which a fireproof coating material 72 is wound around a sleeve material 71 such as a spiral duct, and the sandwiching pieces 61, 61 of the sandwiching portion 60 are the outer edges of the through hole 81. And is sandwiched so as to be sandwiched from both sides.

FIG. 9 is an explanatory view showing a third embodiment of the present invention.
9 shows the end face of the fireproof sleeve 70, and an L-shaped fixture 90 is provided at the end of the fireproof sleeve 70. FIG.
The right figure of FIG. 9 has shown the state which attaches the fireproof coating material 92 to the edge part of the fireproof sleeve 70. FIG. Since an L-shaped fixture 90 is provided at the end of the fireproof sleeve 70, if the fixing pin 91 is driven to be welded to the fixture 90, the fireproof covering material 92 is securely and securely attached to the fireproof sleeve 70. Easy to install.

  The present invention can be widely used as a fixing technique for fixing a fireproof sleeve to a through-hole through which the fireproof sleeve passes.

10, 11 Fixing device (first embodiment)
20 mounting part 21 mounting part main body 22 mounting hole 30 clamping part 31 clamping piece 32 handle part 33 projection part 34 perforation 35 stretching member 40 fixing tool (second embodiment)
50 Mounting part 60 Clamping part 61 Clamping piece 70 Fireproof sleeve 71 Sleeve material 80 Steel beam 81 Through hole 90 Fixing tool 91 Fixing pin 92 Fireproof coating material

Claims (5)

A fixing tool for fixing the fireproof sleeve to a through-hole penetrating the fireproof sleeve,
An attachment portion for attaching the fixture to the outer peripheral surface of the fireproof sleeve;
And a clamping part that is rotatably provided to the attachment part, and clamps the outer edge of the through-hole from both sides ,
The holding part is formed in a substantially U shape, and its bottom part is rotatably connected to the mounting part, and rotates one of a pair of holding pieces constituting the substantially U-shaped holding part. Thus, the other holding piece rotates in the same manner in conjunction with the holding piece .   The fireproof sleeve fixture according to claim 1, further comprising a handle portion that can hold a finger on the holding portion. The fixing tool for a fireproof sleeve according to claim 1 or 2 , wherein a protrusion is provided on the contact surface of the holding portion that contacts the outer edge of the through hole. The fire-resistant sleeve fixing device according to any one of claims 1 to 3 , wherein the holding portion includes an extending member that extends toward the anti-fire-resistant sleeve. A fixing method for fixing a fireproof sleeve to a through-hole through which the fireproof sleeve passes,
A mounting process for mounting a fireproof sleeve fixture for fixing the fireproof sleeve to the outer peripheral surface of the fireproof sleeve;
A penetration step of allowing the fireproof sleeve to pass through the through-hole in a state where the substantially U-shaped sandwiching portion that is rotatably provided on the fireproof sleeve fixing tool and sandwiches the outer edge of the through-hole from both sides;
A fixing step of raising the holding portion that has laid down from the insertion side to the through-hole of the fireproof sleeve and holding the outer edge of the through-hole from both sides, and
In the fixing step, the bottom portion of the holding portion formed in a substantially U-shape is rotatably connected to the mounting portion, and one of a pair of holding pieces constituting the substantially U-shaped holding portion is turned. The fixing method of the fireproof sleeve is characterized in that the other holding piece also rotates in the same manner in conjunction with this .

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