JPH0116862Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a window frame removal device for removing an old window frame when renovating a window.

(Prior Art) There are two methods for renovating old window frames in existing buildings.

One is to remove the existing window frame and install a new window frame, and the other is to leave the existing window frame and install a new window frame.

Conventionally, in order to remove an old window frame, the area around the opening in the wall of the building had to be destroyed by chiseling or other means, so the former method required extensive work and a long period of time. .

The latter construction method was developed to eliminate these drawbacks. However, this method of attaching a new window frame to an old window frame involves attaching and fixing the old window frame, which is already old and corroded, and does not retain the entire outer periphery of the window frame in the wall opening. Since it is fixed to the old window frame in several places using small pieces of mounting members, it cannot necessarily be said that the strength is sufficient. Furthermore, since the new window frame will be placed inside the old window frame, the window will naturally be a little smaller than the old window frame.

Therefore, if the old window frame can be easily removed, it is desirable to remove it and install a new window frame in the wall opening.

(Problem to be solved by the invention) To provide a window frame removal device that can easily and safely remove an old window frame from a wall opening of a building without unnecessary damage to the wall opening. This is the problem of this invention.

[Structure of the invention] (Means for solving the problem) The present invention includes a fixture that can be fixed to both ends of one side of an old window frame to be removed, a wire or chain connected between the two fixtures, and A length adjustment device that is attached to either of the two fixtures to adjust the length of the wire or chain connected between the fixtures, and a holder that is attached to a side other than one side of the window frame to which the fixture is attached. The invention is characterized in that it has a tensioning device attached between the member, the wire or chain, and the holding member, and attachment means for attaching the tensioning device to the wire or chain so that its length can be adjusted.

The wire or chain may be any string-like material having sufficient strength, and is not limited to a wire or chain. It is preferable to use a hydraulic cylinder or the like as the tensioning device, but any device that can pull the chain and the holding member closer to each other may be used.

(Operation) Attach a wire or chain between the fixtures at both ends of one side of the window frame. Its length can be adjusted by means of a length adjustment device. A holding member is attached to the frame on the side to be removed other than the frame on one side, and a tensioning device is attached between the holding member and the wire or chain. At this time, the length of the wire or chain is adjusted using the length adjustment device to prevent loosening. Since the tensioning device is attached to the wire or chain by a slidable attachment means, even if the length of the wire or chain is adjusted with the tensioning device installed, the intermediate portion of the wire or chain will not be affected. A tensioning device can be installed in the

When the tensioning device is operated in this state, the frame body to which the holding member is attached is strongly pulled by the tensioning device, supported by wires or chains spread out and fixed on both sides, and pulled out from the wall opening. It will be done.

In this case, as described above, the length of the wire or chain is adjusted by means of a length adjustment device to prevent loosening of the tensioning device. The tensioning device is therefore under tension from the beginning and no unnecessary shocks are applied to the wall opening when it starts operating.

(Example) The illustrated example includes an upper frame 1, a lower frame 2, a vertical frame 3,
3 from a wall opening in a building.

The figure shows the state in which the upper frame 1 is removed. Therefore, in this embodiment, the fixture 4 is fixed to one end of the lower frame 2, and the fixture and length adjustment device are attached to the other end. A fixing member 5 that is integrated with the above is fixed.

The fixture 4 is a rising part 2a of the lower frame 2 or a horizontal part 2b formed at the tip thereof as shown in FIG.
It may be of any type as long as it can be fixedly attached to the. The simplest configuration is to provide arm portions 4a and 4b that sandwich the horizontal portion 2b as shown in the figure, and to drive a wedge 4c between the horizontal portion 2b and one arm 4a. It is sufficient to simply make a hole in the L-shaped plate, make a hole in the lower frame 2, and secure the two together with bolts and nuts as shown in FIG. Note that this fixture 4 is formed so that an end portion of a chain 6, which will be described later, is attached thereto.

The fixing member 5 is the above-described fixture 4 with a ratchet gear 5a attached thereto. The other end of the chain 6 is attached to the ratchet gear 5a. Naturally, a pawl is attached to the ratchet gear 5a, so that it rotates only in a certain direction (the direction in which it rotates when the end 6a of the chain 6 is pulled in the illustrated state). The length of the chain 6 is adjusted by this ratchet gear 5a. That is, the length adjusting device in this embodiment is constituted by the ratchet gear 5a and a pawl (not shown).

An auxiliary member 8 is attached to the chain 6 as a mounting means for attaching one end of a hydraulic cylinder 7 as a tensioning device. As shown in the figure, two ratchet gears 8a and 8b are attached to the auxiliary member 8, and the chain 6 is guided from one gear 8a to the other gear 8b to the fixed member 5. ing. Instead of this auxiliary member 8, there is no problem in using a hook or ring-shaped member that can be hung on or passed through the chain 6 and can be slid along the chain like the auxiliary member 8.

On the other hand, a holding member 9 is attached to the upper frame 1. One end of a chain 10 is fixed to this holding member 9. This chain 10 is for connecting the hydraulic cylinder 7 to a holding member, and its end 10a is passed through ratchet gears 11a, 11b of an auxiliary member 11 attached to the tip of the hydraulic cylinder 7.
is hanging. Ratchet gears 11a, 11
b is similar to that of the auxiliary member 8, and rotates only when the tip 10a of the chain 10 is pulled down, and does not rotate in the opposite direction.

This auxiliary member 11 is not necessarily necessary. One end of the hydraulic cylinder 7 may be directly attached to the holding member 9.

The holding member 9 may be of any type as long as it is attached to the upper frame 1 and does not come off when it is pulled by the hydraulic cylinder 7.

The case where the upper frame 1 is removed using this device will be described below.

First, fixing tools 4 and fixing members 5 are attached to both sides of the lower frame 2.
to be fixed. One end of the chain 6 is fixed to the fixed part 4, and the other end is guided to the fixed member 5 through the auxiliary member 8. As mentioned above, one end of the hydraulic cylinder 7 is attached to this auxiliary member 8. for now,
The hydraulic cylinder 7 is connected to the chain 6 via the auxiliary member 8.
Leave it with one end attached. Since the fixed member 5 is provided with a ratchet gear 5a, the chain 6 is hung on it to leave its tip 6a free. By pulling the tip 6a, the length of the chain 6 can be adjusted by the ratchet gear 5a. On the other hand, a holding member 9 is fixed to the upper frame 1,
The end of the chain 10 is fixed thereto.

Next, the chain 10 is attached to the ratchet gears 11a and 11b of the auxiliary member 11 at the tip of the hydraulic cylinder 7.
Pass through. When the tip 10a is pulled, the hydraulic cylinder 7 is raised to the state shown in FIG.

At this time, the lengths of chains 6 and 10 are further adjusted by pulling the ends of each so that they do not loosen, and the chains are tightened. At this time, the hydraulic cylinder 7 is held at the center position. The ratchet gear 5a rotates in that direction, but does not rotate in the opposite direction, so
The chain 6 is pulled by a hydraulic cylinder 7 and stretched into a triangular shape as shown. That is, the hydraulic cylinder 7 is placed in a tensioned state.

In this state, the hydraulic cylinder 7 is operated.
The lower side of the hydraulic cylinder 7 is supported from two directions by the chain 6, and the upper side is fixed in one place at the center of the upper frame 1, so the force is concentrated in the center of the upper frame 1, and the upper frame 1 It is pulled out from the wall opening 12 with a strong pull. Naturally, it bends, and the tip of the vertical frame 3 also bends away from the wall opening 12. Thereafter, by attaching the holding part 9 to the end of the vertical frame 3 that is detached from the wall and operating the hydraulic cylinder 7 in the same manner, the entire vertical frame 3 can be removed from the wall opening.

In this way, the old upper frame 1 and vertical frames 3, 3 can be removed from the wall opening.

Unlike the upper frame 1 and vertical frame 3, the lower frame 2 has almost no parts that dig into the wall, so it can be easily removed with a simple tool without using such a device. can.

In this embodiment, a hydraulic cylinder 7 is used as the tensioning device, but it is not necessarily necessary to use a hydraulic cylinder, but an air cylinder or a manual winding device that combines a worm gear and a ratchet that winds the chain 10 directly can be used. There is no problem even if it is.

Further, in this embodiment, the chain 6 is fixed to the lower frame 2, but it is also possible to fix it to another frame body and attach the holding member 9 to another frame body facing the lower frame body. Needless to say.

[Effects of the invention] As described above, the present invention fixes both ends of a chain or wire to one frame, and fixes one end of the chain or wire to a single frame through a length adjustment means that can adjust the length of one end. Since it is fixed, when a tensioning device is installed between this chain or wire and a holding member fixed to another frame, it is possible to install the tensioning device without loosening even if the size of the window is different. This eliminates unnecessary impact on the wall opening when the tensioning device starts operating. Therefore,
The old window frame can be easily removed without damaging the wall opening.

[Brief explanation of the drawing]

Figure 1 is a front view of the first embodiment of the present invention attached to an old window frame, Figure 2 is a side view of the fixture, and Figure 3 is a side view of the fixture.
The figure is a sectional view of the fixing member, and FIG. 4 is a side view of another fixing device. 1: Upper frame, 2: Lower frame, 3: Vertical frame, 4: Fixture,
5: Fixed member, 6, 10: Chain, 7: Hydraulic cylinder, 8, 11: Auxiliary member, 9: Holding member.

Claims (1)

[Scope of utility model registration request] A fixture that can be fixed to both ends of one side of the old window frame to be removed, a wire or chain connected between both fixtures, and a wire or chain for adjusting the length of the wire or chain connected between the fixtures. a length adjusting device attached to either of the fixing devices, a holding member fixed to a side other than one side of the window frame to which the fixing device is attached, and a wire or chain and the holding member. 1. A window frame removal device, comprising: a tensioning device attached between the wires or the chain; and attachment means for attaching the tensioning device to a wire or chain so that its length can be adjusted.