JP3230964B2 - Tube cover for automatic telescoping gates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic telescopic system which is capable of bending and opening and closing a plurality of frames using a push-pull chain which can be bent in only one direction and supports a tensile force or a compressive force in a state of being straightened. The present invention relates to a tube cover for protecting a push-pull chain by penetrating a push-pull chain in a gate, and particularly relates to a tube cover in an automatic telescoping gate capable of preventing a central portion of the tube cover from hanging down. .

[0002]

2. Description of the Related Art Hereinafter, an automatic telescopic gate will be described with reference to FIGS.
This will be described with reference to FIG. The automatic telescopic gate of this example will be described as a one-side open / close type. In FIG. 9, reference numeral 1 denotes an automatic telescoping gate made of, for example, aluminum. The automatic telescoping gate 1 is provided with a column 2 vertically erected from the installation surface M, and separated from the installation column M by a distance from the installation surface M. A vertically extending door stop support 3, a traveling guide 4 laid horizontally on the installation surface M so as to be located between the support 2 and the door stop support 3,
A fixed frame 5 fixed to the column 2, a free end frame (door frame) 6 approaching and moving away from the door stop column 3, the fixed frame 5 and the free end frame 6
A plurality of intermediate frames 7 disposed therebetween, a plurality of pantograph-type links 8 connecting the respective frames 5, 6, 7 so as to extend and contract in a substantially parallel state; A traveling roller 9 rotatably mounted on each lower end of the intermediate frame 7 and rotatably moving on the traveling guide 4, and a base end side is housed so as to be able to be taken in and out of a housing portion provided inside the support column 2, and a tip end is The push-pull chain 10 is connected to the free end frame 6, and has a bellows-shaped tube cover 11 that is stretchable between the frames 5, 6 and 7 and that can be extended and retracted through the push-pull chain 10. Note that the above-described support 2 and the fixed frame 5 constitute a fixed member. The above-mentioned tube cover 11 is formed of a material having elasticity such as rubber.

As shown in FIG. 10, a guide 2a for guiding the push-pull chain 10 in or out is provided in a storage portion provided inside the column 2. As shown in FIG. Further, a sprocket 12 for taking the push-pull chain 10 in and out is provided in the storage portion of the column 2. Further, the column 2 is provided with a driving unit 13 for rotating the sprocket 12 in a predetermined direction.

[0004] The fixed frame 5 is provided with a frame 14 having a guide hole 14 a for the push-pull chain 10. As shown in FIG. 11, a tube holding member 15 for fixing a spherical edge 11a formed at an end of the tube cover 11 is held by the frame body 14 via a connection bracket 16. In addition, the connection bracket 16 is a
1a also serves as a pressing member.

The free end frame 6 is provided with a frame 17 having a guide hole 17a for the push-pull chain 10. A tube holding member 1 for fixing a spherical edge 11 a formed at an end of the tube cover 11 to the frame 17.
8 is held via a connecting bracket 19. Further, the frame 17 is provided with a fixing portion 17b for fixing the tip of the push-pull chain 10. The connection bracket 19 also serves as a pressing member for the ball edge 11a. Further, the free end frame 6 has a handle 6a (only one is shown in FIG. 9) for canceling automatic opening and closing and performing manual opening and closing, and a guide projection 6b for facing guide engaging with the door stop support 3 and 6b.

As shown in FIG. 12, the intermediate frame 7 has a substantially arch shape which opens downward, and a lower frame 20 is fixed between the lower ends thereof. This lower frame 20
As shown in FIGS. 11 and 13, a tube holding member 21 that holds the spherical edge 11 a of the tube cover 11 is fixed via a pressing member 22. This holding member 22
Are fixed to the lower frame 20 by screws 23 as shown in FIG. As shown in FIG. 12, the intermediate frame 7 has an installation frame 23 that rotatably supports the link frame 8, and is connected to both ends of the link frame 8 so that the installation frame 23 of the link frame 8 is centered. A guide frame 24 for guiding rotation is provided.

Next, the operation of the automatic telescopic gate having the above-described structure will be described. First, when an opening operation is performed by a switch (not shown) or a remote control switch, the driving unit 13 is driven to rotate the sprocket 12, and the rotation of the sprocket 12 causes the push-pull chain 10 to be pulled into the fixed support column 2 to be in an extended state. The automatic telescopic gate 1 contracts to open the space between the columns 2 and 3. At this time, similarly to the extended state of the automatic telescoping gate 1, the tube cover 11 in the extended state as shown in FIG.
After the state shown in (B) is reached, the state becomes the contracted state shown in FIG. 14 (C).

On the other hand, when a closing operation is performed by a switch (not shown) or a remote control switch, the driving unit 13
Drives to rotate the sprocket 12, and the rotation of the sprocket 12 pushes out the push-pull chain 10 from the fixed support column 2 and causes the automatic telescopic gate 1 to contract.
Is extended to close the space between the columns 2 and 3. At this time, similarly to the contracted state of the automatic telescopic gate 1, the tube cover 11 which has been in the contracted state as shown in FIG. Then, the state becomes the expanded state shown in FIG.

The push-pull chain 10 is protected by penetrating the above-mentioned automatic telescopic gate, ie, the push-pull chain 10 into a telescopic bellows-like tube cover 11 laid between the frames 5, 6, 7. As an automatic telescopic gate configured to perform
JP-A-280523 (JP-A-7-109870). In addition, as the automatic telescoping gate, there is also a double-sided open / close type in addition to the above-described one-side open / close type.

[0010]

The bellows-shaped tube cover 11 used in the above-mentioned automatic telescoping gate 1 has a length of "1" in the telescoping direction at the time of molding as shown in FIG. In this case, the length of the longest extended state (not shown) is about "1.5", and the length of the shortest contracted state shown in FIG. 14C is about "0.2". The tube cover 11 does not hang down in the vicinity of the center by its own weight because it is pulled in both directions during expansion and contraction movement from the molding state to the longest extension state, and in the shortest contraction state. The right and left sides are in close contact with each other, so that the vicinity of the center does not hang down due to its own weight.
In the stretching movement from the molding state to the shortest contraction state shown in (B), no pulling force is applied in both the left and right directions, and the right and left parts do not adhere to each other. When the vicinity of the center of the tube cover 11 hangs downward, the tube cover 11
The push-pull chain 10 displaced in a penetrating state may rub the inner peripheral surface of the upper part near the center of the tube cover 11.

An object of the present invention is to provide a tube cover for an automatic telescoping gate which can prevent the vicinity of the center of the tube cover from hanging down when the automatic telescoping gate is opened and closed.

[0012]

According to the present invention, in order to solve the above-mentioned problems, the distance between both ends of the tube cover is set such that the upper side when attaching to the fixing member and the frame is the lower side. It is configured to be smaller than the above.

As a result, the tube cover 11A of the present invention
As shown in FIG. 1 (A), the upper distance between both ends of the tube cover 11A of the present invention is smaller at the lower side. Both ends of the tube cover 11A of the present invention are attached to the fixing member and the frame such that the upper distance and the lower distance between both ends of the tube cover 11A of the present invention are equal. Then, at the time of the expansion and contraction movement from the molding state to the shortest contraction state, as shown in FIG. 1B, a force L is applied to the lower side of the tube cover 11A of the present invention from both ends to the center. An upward force M acts near the lower central portion of the tube cover 11A,
This upward force M and the own weight N acting near the center of the tube cover 11A of the present invention cancel each other, and the vicinity of the center of the tube cover 11A of the present invention keeps a substantially horizontal state without sagging. Can be.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Four embodiments of a tube cover in an automatic telescopic gate according to the present invention will be described below with reference to FIGS. 1 and 2 show a first embodiment of a tube cover in an automatic telescopic gate according to the present invention. In the drawing, the same reference numerals as those in FIGS. 9 to 14 denote the same components.

As shown in FIG. 2, the tube cover 11A of the present invention in this embodiment is provided with frames 5, 6, 7 (fixed frames 5 , A free-end frame 6, a plurality of intermediate frames 7), a spherical-shaped mounting portion 110 for mounting to the plurality of intermediate frames 7), and a hollow bellows portion 111 which expands and contracts between the mounting portions 110 at both ends. The distance between the mounting portions 110 at both ends is smaller at the upper side A when mounting to the frames 5, 6, 7 than at the lower side B.

The mounting portions 110 at both ends of the tube cover 11A are equally inclined outward from the upper side to the lower side. That is, in the bellows portion 111 of the tube cover 11A, the half pitch of the unevenness on the mounting portion 110 side at both ends is smaller on the upper side C than on the lower side D, and the half pitch of the unevenness on the other portion is the upper and lower sides Are equivalent.

Furthermore, the bellows portion 1 of the tube cover 11A
The inner diameter of the recessed portion 11 is larger at both ends E than at the center F.

Since the tube cover 11A of the present invention in this embodiment has the above-described configuration, the state at the time of molding is such that the upper distance A between both ends is lower as shown in FIG. 1 (A) and FIG. The mounting portions 110 at both ends of the tube cover 11A of the present invention, in which the distance B is small, are attached to the frames 5, 6, 7.
Attach so that the upper distance and the lower distance between both ends are equal. Then, during the expansion and contraction movement from the molding state to the shortest contraction state, as shown in FIG.
Since a pressing force L is applied to the lower side of the tube cover 11A of the present invention from both ends to the center, the tube cover 11A of the present invention is applied.
An upward force M acts near the lower central portion of the tube cover 11, and the upward force M and the dead weight N acting near the central portion of the tube cover 11A of the present invention cancel each other, and the tube of the present invention The vicinity of the center of the cover 11A can be kept substantially horizontal without sagging. By preventing the center of the tube cover 11A from hanging down, the push-pull chain 10 displaced in a state penetrating through the tube cover 11A rubs the inner peripheral surface of the upper portion near the center of the tube cover 11A. There is no danger.

In particular, in this embodiment, the inner diameter E of the concave portion at both ends of the bellows portion 111 of the tube cover 11A is larger than the internal diameter F of the concave portion at the center side, that is, the central portion of the bellows portion 111 of the tube cover 11A. Since the height H of the unevenness is larger than the height G of the unevenness on both ends, the tube cover 1
The slope length between the unevenness on the center side of the bellows portion 111 of 1A becomes larger than the slope length between the unevenness on both end sides. As a result, during the expansion and contraction movement from the molding state to the shortest contraction state, the upward force M acts efficiently near the lower central portion of the bellows 111 of the tube cover 11A. The drooping prevention effect in the vicinity of the central part, particularly in the vicinity of the upper central part, is further enhanced.

FIG. 3 is a longitudinal sectional view showing a second embodiment of the tube cover in the automatic telescopic gate according to the present invention. In the drawing, the same reference numerals as those in FIGS. 1, 2 and 9 to 14 denote the same components. In the tube cover 11B of the present invention in this embodiment, the inner diameter of the concave portion of the bellows portion 111 is made equal at both ends and the center.

FIG. 4 is a longitudinal sectional view showing a third embodiment of the tube cover in the automatic telescopic gate according to the present invention. In the drawing, the same reference numerals as those in FIGS. 1 to 3 and 9 to 14 denote the same components. The tube cover 11C of the present invention in this embodiment is one end (left end) of the tube cover 11C.
Is inclined outward from the upper side to the lower side, and the mounting section 110 at the other end (right end) is vertical. That is, the bellows portion 1 of the tube cover 11C
11, the half pitch of the irregularities on the left end mounting portion 110 side is smaller on the upper side than on the lower side, and the half pitches of the irregularities on the other portions are the same on both upper and lower sides.

FIGS. 5 to 8 are longitudinal sectional views showing a fourth embodiment of the tube cover in the automatic telescopic gate according to the present invention. In the drawings, the same reference numerals as those in FIGS. 1 to 4 and 9 to 14 denote the same components. In this embodiment, the thickness (strength) of the bellows portion 111 of the tube cover 11D of the present invention is larger at the upper portion near the center portion I and J than at the lower portion, and is larger at the upper portion K near both end portions. It is smaller than the lower side. That is, the thickness (strength) in the vicinity I of the upper portion of the bellows portion 111 changes (gradually changes) so as to gradually increase from both sides to the center. Thickness (strength) at (on both sides of I near the center)
Is gradually increased (gradually changed) from the end side to the center side, and the thickness (strength) near the lower ends K of the bellows portion 111 gradually increases from the end side to the center side. It changes (gradual changes) so that it becomes larger and gradually becomes smaller. The thickness (strength) in the vicinity I of the upper central portion of the bellows 111 is greater than the thickness (strength) in the vicinity J of the upper center of the bellows 111. Further, the thickness (strength) in the vicinity K of both ends on the upper side of the bellows portion 111 and the thickness (strength) in the vicinity I and J near the lower center portion of the bellows portion 111 are equal. Further, the width of the upper strength and the width of the lower strength near I and J near the center of the bellows 111 are set to be substantially the same.

In this embodiment, the tube cover 11
When D shrinks, it shrinks from small portions of the wall thickness (strength) (upper end portions and lower center portion of the bellows 111),
Thickness (strength) when the tube cover 11D is extended
Of the tube cover 11D, it is possible to prevent the vicinity of the central portion of the tube cover 11D from hanging down. Further, in this embodiment, since the thickness (strength) near the lower end portions K of the bellows portion 111 is large, the weight of the bellows portion 111 can withstand the weight near the center portion and the drooping can be synergistically performed. Can be prevented. The thickness (strength) of the bellows 111
In this embodiment (FIGS. 5 to 8), the inner diameter of the concave portion of the bellows portion 111 is made equal between the both ends and the center, and one end (for example, the left end) of the tube cover 11D is formed. The mounting portion 110 may be inclined outward from the upper side to the lower side, and the mounting portion 110 at the other end (for example, the right end) may be vertical.

The above-described second embodiment, third embodiment, and fourth embodiment can achieve the same operation and effects as those of the above-described first embodiment. In addition, the above-mentioned tube covers 11A, 11B, 11C, 1
1D is, for example, ethylene-propylene rubber (EPD)
M).

[0025]

As is clear from the above description, in the tube cover of the automatic telescopic gate according to the present invention, the distance between both ends of the tube cover is set such that the upper side when attaching to the fixing member and the frame is lower than the lower side. Since it is configured so that it is smaller than the side, the both ends of the tube cover are attached to the fixing member and the frame so that the upper distance and the lower distance between both ends are equal. During the expansion and contraction movement up to the shortest contraction state, a force is applied to the lower part of the tube cover from both ends to the center, so that an upward force acts near the lower central part of the tube cover, and this upward force is applied. And the weight acting near the center of the tube cover cancel each other, so that the vicinity of the center of the tube cover can be kept substantially horizontal without sagging.

[Brief description of the drawings]

FIG. 1A is a schematic cross-sectional view showing a state when a tube cover is formed in an automatic telescoping gate according to the present invention, and FIG.
FIG. 4 is an operation explanatory view showing that the vicinity of the central portion of the tube cover remains substantially horizontal without sagging during the expansion and contraction movement from the molded state to the shortest contraction state of the tube cover of the present invention.

FIG. 2 is a sectional view showing a first embodiment of a tube cover in the automatic telescopic gate according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of the tube cover in the automatic telescopic gate of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the tube cover in the automatic telescopic gate according to the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the tube cover in the automatic telescopic gate of the present invention.

FIG. 6 is a view taken in the direction of arrow VI in FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 5;

FIG. 9 is a front view showing a closed state of the automatic telescopic gate.

FIG. 10 is an explanatory diagram showing the operation of the push-pull chain.

FIG. 11 is a cross-sectional view showing a connected state of the tube cover.

FIG. 12 is a side view of the intermediate frame.

FIG. 13 is a partial sectional view of a lower frame.

FIGS. 14A and 14B are explanatory diagrams showing a telescopic state of a tube cover interlocked with opening and closing of an automatic telescopic gate, wherein FIG. 14A is an explanatory diagram when the length of the tube cover is the length of a molded state;
(B) is an explanatory view when the length of the tube cover is between the molded state and the shortest contraction state, and (C) is an explanatory view when the length of the tube cover is in the shortest contraction state.

[Explanation of symbols]

1 ... automatic telescopic gate, 2 ... fixed support (fixed member), 5 ...
Fixed frame (fixing member), 6: Free end frame (door frame), 7: Intermediate frame, 8: Link, 10: Push-pull chain, 11A, 11B, 11C, 11D
... tube cover, 110 ... mounting part, 111 ... bellows part.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-109870 (JP, A) JP-A-7-293112 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E06B 11/02

Claims (10)

(57) [Claims] A plurality of intermediate frames and a free end frame are connected to a fixed member so as to be extendable and contractible by a link, and a bellows-type tube cover is provided between the fixed member and the frame. A push-pull chain is pierced through this tube cover, and the base end side of the push-pull chain can enter and exit a storage section provided on the fixing member. The push-pull chain is housed, and the tip of the push-pull chain is connected to the free-end frame.In the automatic telescoping gate in which the frame expands and contracts by taking the push-pull chain in and out, the tube cover is opened. Attachment portions attached to the fixing member and the frame at both ends, and expansion and contraction between the attachment portions at both ends. A hollow bellows portion, wherein the distance between the mounting portions at both ends is smaller on the upper side when mounting to the fixing member and the frame than on the lower side. Tube cover for automatic telescoping gates. 2. The tube cover according to claim 1, wherein the mounting portions at both ends of the tube cover are equally inclined outward from the upper side to the lower side. 3. The mounting portion at one end of the tube cover is inclined outward from the upper side to the lower side, and the mounting portion at the other end of the tube cover is vertical. A tube cover for the automatic telescoping gate according to claim 1. 4. The half pitch of the irregularities on both sides of the bellows portion of the tube cover on the mounting portion side is smaller on the upper side than on the lower side, and the half pitch of the irregularities on the other portions is the same. The tube cover in the automatic telescoping gate according to claim 1 or 2, characterized in that: 5. The half pitch of the irregularities on the mounting portion side of one end of the bellows portion of the tube cover is smaller on the upper side than on the lower side, and the half pitch of the irregularities on the other portions is the same. The tube cover in the automatic telescopic gate according to claim 1 or 3, wherein the tube cover is provided. 6. The automatic telescopic type according to claim 1, wherein the inner diameter of the concave portion of the bellows portion of the tube cover is larger at both ends than at the center. Tube cover at the gate. 7. The wall thickness of the bellows portion of the tube cover is larger at the upper portion near the center portion than at the lower portion, and smaller at the upper portion near both end portions than at the lower portion. A tube cover for an automatic telescoping gate according to any one of claims 1 to 6. 8. The bellows portion of the tube cover has a partially different upper and lower strength so as to have a certain degree of regularity in the expansion and contraction process, and at least a lower strength near a central portion. The tube cover in the automatic telescopic gate according to any one of claims 1 to 7, wherein is set to be weak. 9. The tube cover for an automatic telescoping gate according to claim 8, wherein the bellows portion of the tube cover has a strong lower strength near both ends. 10. The width of the upper strength and the lower strength near the center of the bellows portion of the tube cover are set substantially equal to each other. Tube cover for automatic telescoping gates.