JPH082387Y2 - Overhead door - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an overhead door (hereinafter referred to as an OH door) that is opened and closed by lifting and hanging a weight chain connected to a door body.

[Conventional technology]

Generally, when durability is required for the connecting material for lifting and hanging the door body of the OH door, a roller chain is adopted instead of the wire rope. Explaining a conventional OH door, guide rails attached to both sides of the front opening, a door body with rollers fitted in both guide rails, and one side connected to the lower ends of both sides of the door body and the other side It is composed of a weight chain on both sides, which serves as a counterweight part via a sprocket provided at the top of the opening. In addition, there is also one in which a counterweight portion is not provided on the other end portion of the weight chain, but is simply a free end.

Therefore, since the weight chain moves in weight as the door body rises, the door body is lifted and lifted to open the opening. When the door body is lowered, the weight chain suspends the door body, so that the door body is lowered in a well-balanced manner to close the opening.

[Problems to be solved by the device]

By the way, the conventional OH door that is opened and closed by the weight chain has the following problems.

If the other end of the weight chain is made free, the free end side chain is wound in the direction of rotation of the sprocket when the door body starts to rise, that is, when one side of the weight chain is lifted and the other side moves downward. Especially in winter, the grease hardens and freezes, causing the problem that the free end side does not move downward and winds around the sprocket and bites on the sprocket.

Also, in the case where the counterweight part is provided at the other end of the weight chain, the entire chain is lengthened by the length of the weight, so when the door body is fully opened, the weight chain including the weight loosens on the floor, There were drawbacks such as hitting something and making sound or being caught. In addition, if the length of the chain is made short so that the weight does not touch the floor, the chain connection part on the door body side will be changed to a higher position, and as a result, the door body will not be fully opened and the opening will not be effective. There was also a problem that the height could not be obtained.

The present invention has been made in view of the above problems, in which the other side of the weight chain is smoothly lowered, various adverse effects caused by the weight and the chain on the floor are avoided, and the effective height of the opening is regulated. The purpose is to provide an OH door that can be obtained as is.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides a door main body that is provided so as to be openable and closable along a guide rail, one side of which is connected to the door main body and the other side via a sprocket attached to the upper side of the body side. An overhead type consisting of a weight chain that is a suspended free end or a counterweight portion, one side of the weight chain is raised to open the door body, and one side is lowered to close the door body. In the door, the other side of the weight chain is attached to the body side and the other side of the weight chain moves up and down inside, and the other side of the weight chain is slidably provided vertically along the chain guide section and the other side of the weight chain is inserted. The lower limit position is regulated by abutting the engaging part provided on the upper part of the chain guide part. A guide member and a fastener attached to the other end of the weight chain and engaged with the chain start guide member by the upward movement of the other side to raise the chain start guide member along the chain guide portion. And the engaging member engages with the chain start guide member so that the chain start guide member is fitted and inserted in the chain start guide member so that the chain start guide member does not come out of the chain guide part. A chain guide mechanism including a fitting insertion portion formed so that the length of the fitting insertion portion is longer than the stroke of the locking tool that rises after the door body is closed. And

[Action]

According to this invention, when the door body is lifted and is in the fully opened state, the other side of the weight chain is inserted through the chain start guide member, and the end thereof is located below the chain guide portion. When the door body is lowered and closed from this state, one side of the weight chain is suspended and the other side moves upward, and the locking tool provided at the other end engages with the chain start guide member and the chain start guide member is engaged. Lift along the chain guide and hang it. Further, when the door body is released from the closed state, one side of the weight chain is lifted and the other side is moved downward, and the chain start guide member suspended by the locking tool is guided by its own weight. Descend along the section,
The lower limit position is regulated by contacting the engaging portion and stopping. The other side of the weight chain is guided toward the chain guide portion until the chain start guide member stops, and then moves downward in the chain guide portion.

Therefore, when the door body rises, the chain start guide member suspended from the other side of the weight chain descends along the chain guide portion as the weight chain other side moves downward, and is provided above the chain guide portion. Since it abuts against the engaged portion and stops, the end portion on the other side of the weight chain is reliably introduced into the chain guide portion. The chain start guide member is in a stopped state due to its own weight drop being restricted at the upper part of the chain guide portion, and the chain is shortened by the absence of the chain start guide member that acts as a weight, so that the weight chain other side does not get on the floor.

〔Example〕

An embodiment according to the present invention will be described with reference to the drawings. Fig. 1 of the drawings is an inside view of an OH door equipped with a chain guide mechanism, Fig. 2 is a side view with a part of the chain guide mechanism in a closed state of the door body, with parts omitted, and Fig. 3 is an open state of the door body. A partially omitted side view showing the chain guide mechanism, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is FIG.
-V line sectional drawing, FIG. 6 is sectional drawing which shows the operating state of a chain starting guide member.

First, a general OH door A shown in FIG. 1 will be described. The guide rail C is composed of a vertical rail portion and a horizontal rail portion, which are attached to the frame B on both sides of the front opening, and the rollers 2 formed of a plurality of panels 1 and projecting at both ends are fitted into both guide rails C. The door body D, the winding shaft E that rotates in the forward and reverse directions by the operation of the electric motor 3, the sprockets 4 axially fitted to both ends of the winding shaft E, and the door body D.
Each one side is connected to the suspension bases 5 provided at the lower end portions on both sides of the
(See FIG. 6) The weight chains 7 on both sides are connected to each other, and the torsion coil spring 8 wound around the winding shaft E and always biases the weight chains 7 in the lifting direction by the restoring force.

As shown in FIGS. 2 to 6, the chain guide mechanism F includes a pipe-shaped chain guide portion 10 mounted below both sprockets 4 and a weight chain which is slidably mounted on the chain guide portion 10 in the vertical direction. 7, the other side 7b is inserted and the lower limit position is regulated by contacting the upper edge 10b as an engaging portion provided on the upper part of the chain guide portion 10, and the other side of the weight chain. It is composed of the locking tool 6 attached to the end of 7b.

The chain guide portion 10 is a long pipe, and the weight chain other side 7b passing through the sprocket 4 is attached by a mounting member 9 (see FIGS. 4 and 5) at a position where it can move up and down along the axis of the pipe. It is standing. The upper portion of the sprocket 4 is separated from the sprocket 4 by an appropriate distance.

As shown in FIG. 6, the chain starting guide member 11 is a pipe with a collar, and has a disk-shaped collar portion 11a larger than the diameter of the chain guide portion 10 and an insertion portion having an outer diameter smaller than the inner diameter of the chain guide portion 10. And a through hole 11c through which the weight chain 7 is loosely inserted is formed at the center of the flange 11a. The chain starting guide member 11 has a double pipe structure in which the pipe portion 11b is inserted from above the chain guide portion 10 with the flange portion 11a facing upward, and the through hole 11 is formed.
The other side 7b of the weight chain is previously inserted into c. Then, a plate-like locking tool 6 larger than the diameter of the through hole 11c of the chain starting guide member 11 is attached to the end of the other side 7b of the weight chain. Therefore, the lower limit position of the chain starting guide member 11 is regulated by the flange portion 11a contacting the upper end edge 10b of the chain guide portion 10 which is the engaging portion. Further, due to the upward movement of the locking tool 6 which is interlocked with the upward movement of the other side 7b of the weight chain, the locking tool 6 engages with the chain starting guide member 11 to move the chain starting guide member 11 along the chain guide portion 10. To raise. In addition, the pipe portion 11b is fitted into the chain guide portion 10 more than the stroke in which the locking tool 6 rises after the locking tool 6 is engaged with the chain starting guide member 11 until the door body D is completely closed. Since the length of the inserted fitting portion is long, the chain starting guide member 11 does not come off from the chain guide portion 10.

On the other hand, a longitudinal elongated hole 10a is formed on the upper side surface of the chain guide portion 10, and one engaging pin 11d protruding from the lower side surface of the pipe portion 11b of the chain starting guide member 11 is formed.
Is inserted into the long hole 11a so that the tip end thereof projects outward from the side surface of the chain guide portion 10. And the long hole 10
A micro switch 12 that enables transmission of a stop signal to the electric motor 3 is attached to the position on the body side facing a.
This micro switch 12 is a safety switch, so that the engagement pin 11d of the chain starting guide member 11 abuts at its upper limit position and is turned on so that it operates in synchronization with the closing of the door body D. The position has been adjusted. Therefore, the lower limit switch can be provided at a high position without being provided near the floor where water may enter.

The chain starting guide member 11 functions as a weight, and the weight of the counterweight can be balanced by the length of the pipe portion 11b.

In addition to the above embodiments, the following may be performed. FIG. 7 is an abbreviated sectional view showing a second embodiment of the chain guide mechanism, and FIG. 8 is an abbreviated sectional view showing a third embodiment of the chain guide mechanism.

The chain guide mechanism F'of the second embodiment has a projection portion as an engaging portion on the inner peripheral surface of the chain guide portion 10 as shown in the figure.
15 to form a bottomed cylindrical chain starting guide member 11 'having an outer diameter smaller than the inner diameter of the chain guide portion 10
It is fitted in the chain guide portion 10 so that it can move up and down with 1'a facing upward. The bottom 1 of this chain start guide member 11 '
A through hole 11c similar to that of the above-described embodiment is formed in 1'a so that the lower opening edge portion abuts on the protrusion 15 so that the lower limit position is restricted. Then, the locking tool 6, the long hole 10a of the chain guide portion 10 and the chain start guide member 1
The engaging pin 11d of 1'and the pipe portion 11b 'as a fitting insertion portion are provided as in the above embodiment.

In the chain guide mechanism F ″ of the third embodiment, as shown in the drawing, a protrusion 16 as an engaging portion is formed on the outer periphery of the chain guide portion 10, and the inner diameter is larger than the outer diameter of the chain guide portion 10. A bottom cylinder-shaped chain starting guide member 11 ″ is externally fitted onto the chain guide portion 10 with its bottom portion 11 ″ a facing upward so as to be vertically movable, and the lower opening edge portion abuts the protrusion portion 16 to regulate the lower limit position. The first embodiment is also used in this embodiment.
As in the case of the second embodiment, the length of the fitting portion of the pipe 11b ″ serving as the fitting portion of the chain starting guide member 11 ″ is such that the length of the fitting portion fitted in the chain guide portion 10 is the locking member 6 Is formed longer than the stroke by which the locking tool 6 rises from the time when it engages the chain starting guide member 11 ″ to the time when the door body D is completely closed. 11 ″ never comes off. Also,
An engaging pin 11d or a plate-like locking plate similar to that of the above embodiment is provided on the side surface of the chain start guide member 11 ″ so that the micro switch 12 is activated by the upward movement of the chain start guide member 11 ″. There is.

Since the chain guide mechanism F is configured as described above, when the door body D is in the closed state as shown in FIG. 2, the chain start guide member 11 rises along the chain guide portion 10 and other parts of the weight chain 7 are removed. It is kept suspended on the side 7b. When the electric motor 3 is actuated from this state to open the door body D, the sprocket 4 rotates counterclockwise as shown in FIG.
Is lifted and the door body D is lifted. On the other hand, the other side 7b of the weight chain moves downward as the sprocket 4 rotates, so that the chain start guide member 11 is
It descends by its own weight along with and contacts the upper end edge 10b of the chain guide portion 10 and stops. After that, the engagement between the locking tool 6 and the chain starting guide member 11 is released, so that the other side 7b of the weight chain moves downward in the chain guide portion 10. Therefore, the end portion of the other side 7b of the weight chain is reliably guided by the chain guide portion 10 and introduced inside.
The chain starting guide member 11 that functions as a weight is stopped at the upper part of the chain guide portion 10, and the weight chain other side 7b is shortened by the absence of the chain starting guide member 11, so that it does not touch the floor.

On the contrary, if the door body D is closed while it is open,
The state shown in FIG. 3 shifts to the state shown in FIG. That is,
The clockwise rotation of the sprocket 4 causes the other side 7b of the weight chain to move upward in the chain guide portion 10, and the locking tool 6 at the end engages with the chain start guide member 11 to follow the chain guide portion 10. The chain start guide member 11 is lifted to bring it into a suspended state. Chain start guide member shown in FIG.
At the upper limit position of 11, the engagement pin 11d turns the micro switch 12
N operation is performed and the operation of the electric motor 3 is stopped.

In this embodiment, an example in which the electric motor is used for an OH door is shown, but the present invention is not limited to this, and various manual means such as a chain block may be used. In that case, the engagement pin of the chain starting guide member, the long hole of the chain guide portion, etc. are not required, including the micro switch.

[Effect of device]

Since the present invention is configured as described above, the chain start guide member, which is in a state of being suspended from the other side 7b of the weight chain 7 when the door body is lifted, moves to the chain guide portion as the other side of the weight chain moves downward. It will drop along its own weight and come into contact with the locking part of the chain guide part to stop, so the other end of the weight chain can be reliably introduced into the chain guide part, and problems such as being caught in the sprocket can be eliminated. .

Also, after the downward movement of the chain start guide member has stopped,
Only the weight chain continues to move downward, and since the chain start guide member that functions as a weight is not provided, the chain becomes shorter, and the other side of the weight chain does not get on the floor.
Therefore, it is possible to avoid an adverse effect that the weight or the chain hits an object to generate a sound or get caught.

[Brief description of drawings]

The drawings relate to an embodiment of the present invention, FIG. 1 is an inside view of an OH door having a chain guide mechanism, FIG. 2 is a side view of the chain guide mechanism in a closed state of the door body, with parts omitted, and FIG. FIG. 4 is a side view of the chain guide mechanism in the opened state of the door body with part omitted, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG. FIG. 7 is a sectional view showing an operating state of the chain start guide member, FIG. 7 is an abbreviated sectional view showing a second embodiment of the chain guide mechanism, and FIG. 8 is an abbreviated sectional view showing a third embodiment of the chain guide mechanism. is there. A: OH door (overhead door) B: skeleton, C: guide rail D: door body, E: winding shaft F, F ', F "... chain guide mechanism 3 ... electric motor, 4 …… Sprocket 6 …… Locking device, 7 …… Weight chain 7a …… Weight chain one side 7b …… Weight chain other side 8 …… Torsion coil spring (biasing means) 9 …… Mounting member, 10 …… Chain guide part 10a …… Long hole 11,11 ′, 11 ″ …… Chain starter guide member 11a …… Flange part 11′a, 11 ″ a …… Bottom 11b …… Pipe part 11c …… Through hole, 11d …… Engagement pin 12 …… Micro switch 15,16 …… Projection

Claims (1)

[Scope of utility model registration request] 1. A door main body (D) provided to be openable and closable along a guide rail (C), one side (7a) thereof is connected to the door main body (D), and the other side (7b) is a frame. It consists of a weight chain (7) which is a free end or a counterweight part suspended via a sprocket (4) attached to the upper part of the side, and raises one side (7a) of the weight chain (7). In the overhead door in which the door body (D) is opened and the one side (7a) is lowered to close the door body (D), the weight chain (7) attached to the body (B) side
The other side (7b) moves up and down inside the chain guide part (1
0) and the other side (7b) of the weight chain (7) which is provided slidably up and down along the chain guide part (10) and is provided above the chain guide part (10). Chain starting guide member (11, 11 ', whose lower limit position is regulated by abutting the engaged portion (10b, 15, 16)
11 ″) and the other end of the weight chain (7), and by the upward movement of the other side (7b), the chain start guide member (11, 1).
1 ', 11 ") to engage the chain start guide member (11, 1"
1 ', 11 ") is provided along the chain guide part (10) and a locking tool (6), and the chain start guide member (11, 11', 11") is provided with the chain guide part (11). 10) and the locking tool (6) is attached to the chain starting guide member so that the chain starting guide member (11, 11 ′, 11 ″) does not come out of the chain guide portion (10). Fitting insertion parts (11b, 11b) formed such that the length of the fitting insertion part is longer than the stroke of the locking tool (6) that rises after the engagement and before the door body (D) is closed. ′, 11b ″) and a chain guide mechanism (F, F ′, F ″) consisting of an overhead door.