JP2000170472A - Ladder device for ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and properly adjust an arranging height of a ladder main body by moving an upper end pivot position of a suspending link. SOLUTION: This ladder device for the ceiling has a ladder main body 4 constituted so as to be housed by being folded up above the ceiling 1, a suspending link 9 having an upper end part for supporting the ladder main body 4 by being pivoted on the upper edge frame 2 and being telescopically constituted in an intermediate part and a stopper 23 for checking the rotational displacement by abutting to the suspending link 9 when using the ladder main body 4, a supending bracket 13 for pivoting an upper end part of the suspending link 9 is arranged in the upper edge frame 2, plural peripheral grooves on which an upper end pivot part (a pivot pin 24) of the suspending link 9 is locked and a vertical groove for guding the pivot part by connecting the respective peripheral grooves are formed in this suspending bracket 13, and the upper end pivot part of the suspending link 9 is selectively locked on one of the peripheral grooves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder device for a ceiling used for ascending and descending to a space above a ceiling.

[0002]

2. Description of the Related Art Conventionally, as shown in, for example, Japanese Utility Model Application Laid-Open No. 61-59725, one end of a lid having a ladder body which is foldable on the upper surface is pivotally connected to the lower part of one end of an opening frame. One end of the suspension link connecting the pair of links is rotatably pivotally attached to the side surface of the opening frame, and the other end of the suspension link is pivotally pivotally supported on the lid, and Attach the stopper block to the side with screws such as bolts or screws so that it can be freely attached to the top and bottom, and change the positioning angle of the suspension link by changing the contact part of the stopper block, so that the ladder according to the ceiling height 2. Description of the Related Art It has been practiced that a suspension link for adjusting the installation height of a main body can be reliably supported by a link receiving portion.

[0003]

As described above, the stopper block is turned upside down or turned upside down to change the contact portion that contacts the suspension link, and the suspension link contacts the contact portion of the stopper block. When the angle of the ladder unit is adjusted by adjusting the angle at which the suspension link can be positioned by adjusting the link receiving part, the contact part of the stopper block with respect to this suspension link When changing the position, it is necessary to screw the stopper block with the contact portion exactly along the suspension link, and there is a problem that this operation is complicated.

That is, the stopper block includes:
Since a mounting hole formed of a fool hole through which the screw is inserted is formed, if a mounting error corresponding to a difference between the hole diameter of the mounting hole and the shaft diameter of the screw occurs between the left and right suspension links. However, it is inevitable that a one-sided contact state occurs in which only one of the suspension links hits the contact portion of the stopper block. In order to prevent the occurrence of this one-sided contact state, the left and right stopper blocks are simultaneously screwed with the ladder main body expanded and the left and right suspension links in contact with the contact portions, respectively, or Operations such as changing the mounting state of the other stopper block in accordance with the mounting state of one stopper block must be repeatedly performed, and there is a problem that this operation is complicated.

[0005] In view of such circumstances, the present invention provides a ceiling ladder device capable of easily and properly adjusting the installation height of a ladder main body by moving the upper end pivot position of a suspension link. Is what you do.

[0006]

The invention according to claim 1 is
An edge frame attached to the opening of the ceiling, a ladder body configured to be unfolded and bridged between the edge frame and the floor, and folded and stored above the ceiling, The upper end portion is pivotally supported by the edge frame to support the ladder main body, and the suspension link is configured to be able to bend and extend at the middle portion. A ceiling ladder device having a stopper for preventing displacement, wherein a suspension bracket for pivotally supporting an upper end of a suspension link is provided on the edge frame, and the suspension bracket is provided with an upper end pivot of the suspension link. A plurality of lateral grooves in which the supports are locked, and a vertical groove connecting the lateral grooves to guide the pivot portion are formed, and the upper end pivot portion of the suspension link is selectively engaged with one of the lateral grooves. It is configured to stop.

According to the above structure, when moving the upper end pivotal support position of the suspension link, the upper end pivotal support portion of the suspension link is slid along the vertical groove formed in the suspension bracket to move the plurality of suspension links. By selecting one of the lateral grooves and introducing the pivot portion, the upper pivot position of the suspension link is moved, and the installation height of the ladder main body supported by the suspension link is adjusted. You. Also, the work of changing the upper end pivotal support positions of the pair of suspension links provided on the left and right sides of the ladder main body is performed at the same time, and the installation height of the ladder main body is easily and accurately adjusted.

According to a second aspect of the present invention, in the ladder device for a ceiling according to the first aspect of the present invention, a regulating member for locking the upper end pivotal support of the suspension link in the lateral groove is provided.
It is configured to be displaceable between a regulation position for regulating the upper end pivot portion of the suspension link to be drawn out of the groove and a regulation release position in which the regulation state of the pivot portion is released.

According to the above configuration, with the regulating member set at the regulation releasing position, the upper end pivotal support portion of the suspension link is slid along the vertical groove, whereby one of the plurality of lateral grooves is moved. The upper end pivoting portion of the suspension bracket can be selected to be introduced, and the upper end pivoting portion of the suspension link can be stably locked in one of the lateral grooves by setting the regulating member to the regulating position. be able to.

According to a third aspect of the present invention, in the ceiling ladder device according to the second aspect, the restricting member is moved to a restricting position for covering the vertical groove of the suspension bracket and a restriction releasing position for opening the vertical groove. In addition to being configured to be displaceable, a temporary fixing portion for temporarily fixing the restricting member to the restriction releasing position is provided.

According to the above construction, one of the plurality of lateral grooves is selected by sliding the upper end pivotal support of the suspension link along the vertical groove while the restricting member is temporarily fixed at the restriction release position. Then, the operation of introducing the upper end pivot of the suspension link can be easily performed.

[0012] The invention according to claim 4 is an edge frame attached to the opening of the ceiling, and is developed and bridged between the edge frame and the floor surface, and is folded and stored above the ceiling. A ladder body, an upper end portion of which is pivotally supported by the edge frame to support the ladder body, and a suspension link configured to bendable and extendable at an intermediate portion, and the ladder body is attached upward. A ceiling ladder device provided with a tension spring for biasing, wherein a plurality of upper and lower locking portions for locking the end of the tension spring to a supporting portion for supporting the end of the tension spring; And a guide groove for guiding the end of the spring by connecting the stop portions.

According to the above construction, the end of the tension spring is slid along the guide groove provided in the support portion formed of a support bracket or the like for supporting the end of the tension spring. The position of the locking portion at which is locked can be easily changed, whereby the biasing force of the tension spring is adjusted.

[0014]

1 and 2 show an embodiment of a ceiling ladder device according to the present invention. The ceiling ladder device includes an edge frame 2 attached to an opening formed in a ceiling 1, a canopy 3 whose front end is hingedly connected to the edge frame 2, and which is openably and closably supported. 3
And a lock mechanism (not shown) for locking the rear end of the ladder body 4 to the edge frame 2 when the canopy 3 is closed.

The ladder body 4 has three ladder sections 4 which are foldably connected by hinge fittings 5 and 6.
a, 4b, 4c, and the uppermost ladder portion 4a is fixed to the upper surface of the canopy 3 by mounting brackets 7, 7. When the ladder body 4 is used, as shown in FIG. 1, the ladder parts 4a to 4c are unfolded and bridged between the edge frame 2 and the floor 8 as shown in FIG. As shown in FIG. 1, the storage device is configured to be stored above the ceiling 1 in a state of being folded on the canopy 3.

A pair of left and right suspension links 9 for supporting the canopy 3 and the ladder main body 4 are provided between the edge frame 2 and the canopy 3. The suspension link 9 is provided with a pin 10
The upper link 11 and the lower link 12 are pivotally supported by, and are configured to bend and stretch at an intermediate portion. That is, the upper end of the upper link 11 is
, The lower end of the lower link 12 is pivotally supported by a mounting bracket 14 fixed to the upper surface of the canopy 3, and the ladder main body 4 shifts from the expanded state to the folded state. In response to this, the suspension link 9 shifts from the extended state as shown in FIG. 1 to the bent state at the intermediate portion as shown in FIG.

A support bracket 35 for supporting the upper end of the tension spring 15 is attached to a front end of the edge frame 2. The support bracket 35 and the suspension link 9
The tension spring 15 is stretched between the lower link 12 and the extension spring 15. The tension spring 15 urges the canopy 3 and the ladder main body 4 upward, thereby forming the ladder main body 4.
When the canopy 3 is stored, the lifting force is reduced, and when the canopy 3 is opened, the sudden displacement is prevented.

The hanging bracket 13 is shown in FIGS.
As shown in the figure, a mounting plate 16 screwed to the edge frame 2,
It is formed in a hat-shaped cross section having a wall surface of the edge frame 2 and a substrate 17 extending in parallel. A plurality of upper and lower horizontal grooves 18 to 21 and a single vertical groove 22 extending to connect these horizontal grooves 18 to 21 are formed in the substrate 17 of the suspension bracket 13.
Are formed, and a stopper 23 that protrudes from the upper link 11 to prevent the rotation of the upper link 11 is provided.
The uppermost horizontal groove 18 is disposed on the frontmost side of the suspension bracket 13, and the lower horizontal grooves 19 to 21 are sequentially disposed on the rear side.

Then, by sliding the upper end pivoting portion consisting of a pivoting pin 24 projecting from the upper end of the upper link 11 along the vertical groove 22, one of the lateral grooves 18 to 21 can be arbitrarily set. Selected for the pivot pin 24
Is being introduced. The lateral groove 18 is provided between the edge frame 2 and the substrate 17 of the suspension bracket 13.
A restricting member 25 for rotatably locking the pivot pin 24 of the upper link 11 introduced to the upper link 11 is inserted, and the restricting member 25 is fixed to the wall surface of the edge frame 2 by screws 26. .

The regulating member 25 includes a suspension bracket 13.
The vertical grooves 22 cover the disk-shaped flange portions 27 provided on the pivot pins 24 while allowing the disk-shaped flange portions 27 to rotate in the horizontal grooves 18 to 21.
It is configured to regulate being led out. The vertical groove 22 is opened by removing the screw 26 and displacing the restriction member 25 to the upper restriction release position as shown by the imaginary line in FIG. Sliding displacement of the pin 24 is allowed.

A longitudinal groove 22 is formed at the lower end of the regulating member 25.
A protruding piece 28 that slides along the protruding portion is provided, and the protruding piece 28 contacts the lower side of the vertical groove 22 to position the regulating member 25 at the restricting position. The restricting member 25 is configured to be prevented from being pulled out of the installation portion of the suspension bracket 13 by being in contact with the upper side portion of the suspension bracket 13.

In addition, the lower part of the regulating member 25 is shown in FIG.
As shown in FIG. 7, V-shaped notches 29 are formed on both left and right sides. By engaging the notch 29 with the upper side of the substrate 17 in a state where the regulating member 25 is moved to the upper regulation releasing position, the upper end of the regulating member 25 tilts inward according to its own weight. Thus, the regulating member 25 is temporarily stopped at the regulation releasing position.

As shown in FIG. 6, the support bracket 35 has a cross section U having a mounting plate 30 mounted on the wall surface of the edge frame 2 and a substrate 31 extending in parallel with the mounting plate 30.
It is formed in a character shape. A horizontal groove 32 extending in the horizontal direction is formed on the substrate 31 of the support bracket 35.
And a vertical groove 33 extending downward from the front end of the vertical axis.

The upper end of the tension spring 15 is selectively hooked by a hook member 34 to the upper locking portion formed by the rear end portion 32a of the horizontal groove 32 or the lower locking portion formed by the lower end portion 33a of the vertical groove 33. The engagement is configured such that the urging force of the tension spring 15 is adjusted. For example, the hook member 34 locked by the lower locking portion formed by the lower end portion 32 a of the vertical groove 33 is slid along the guide groove formed by the horizontal groove 32 and the vertical groove 33 to displace the rear end of the horizontal groove 32. Engaging the upper-stage engaging portion composed of the portion 32a can increase the urging force of the tension spring 15.

In the above configuration, the distance between the edge frame 2 attached to the opening of the ceiling 1 and the floor 8 is
When adjusting the installation height of the ladder main body 4, as shown in the phantom line of FIG. 3 and FIG. 5, the regulating member 25 is temporarily fixed to the upper regulation releasing position and protrudes from the upper link 11. The upper end pivot portion of the suspension link 9 including the pivot pin 24 is slid along the vertical groove 22, and the position of the pivot pin 24 locked in the lateral grooves 18 to 21 is changed to suspend. The upper pivot position of the link 9 is moved. As a result,
The installation angle of the ladder main body 4 supported in the deployed state by the suspension link 9 changes, and the installation height of the ladder main body 4 is adjusted.

That is, as shown by the solid line in FIG. 7, the state where the pivot pin 24 is locked in the uppermost lateral groove 18 is changed from the state shown in FIG.
As shown by the imaginary line, the pivot pin 2 is inserted into the lowermost lateral groove 21.
When the locking position of the suspension link 4 is changed,
Since the installation angle α of the ladder main body 4 supported in the deployed state becomes steep, the installation height of the ladder main body 4 is correspondingly increased.

The positions, the number, and the installation directions of the lateral grooves 18 to 21 are not limited to the above embodiment, and various changes can be made. As shown in the above embodiment, the uppermost lateral groove 18 In contrast, when the lower horizontal grooves 19 to 21 are arranged so as to be sequentially located on the rear side, when the pivotal position of the suspension link 9 is changed downward, the stopper 23 comes into contact with the stopper 23. The extension angle β of the suspension link 9 constrained by the above can be increased. When the pivotal position of the suspension link 9 is changed downward, the installation angle α of the ladder main body 4 and the suspension link 9
, The connection angle γ between the upper link 11 and the lower link 12 at the time of extension of the suspension link 9 becomes substantially constant regardless of the pivotal position. Will be maintained.

As described above, the suspension bracket 13 for pivotally supporting the upper end of the suspension link 9 is provided on the edge frame 2 attached to the opening of the ceiling 1, and the suspension bracket 13 has a plurality of lateral grooves 18. 21 and a vertical groove 22 connecting the horizontal grooves 18 to 21, and the upper end pivot portion (pivot pin 24) of the suspension link 9 is slid along the vertical groove 22. After one of the lateral grooves 18 to 21 is selected to introduce the upper end pivot of the suspension link 9, the pivot is locked in one of the lateral grooves 18 to 21 to thereby suspend the suspension link 9. 9 can be moved.

Therefore, by moving the upper end pivotal support position of the suspension link 9 in accordance with the distance between the edge frame 2 and the floor 8, the edge frame 2 and the floor 8 are used when the ladder body 4 is used. The work of adjusting the installation height of the ladder main body 4 can be easily executed so that the ladder main body 4 is bridged in a proper state between the ladder main body 4 and the ladder main body 4. Moreover, the above-mentioned ladder body 4
Since the work for changing the upper end pivotal support position of the pair of suspension links 9 provided on the left and right sides can be performed simultaneously on the left and right sides, the installation height of the ladder main body 4 can be easily and accurately adjusted. .

Further, in the above embodiment, the upper end pivotal support of the suspension link 9 introduced into the lateral grooves 18 to 21 of the suspension bracket 13 is restricted from being led out of the lateral grooves 18 to 21, thereby controlling the upper end. A restricting member 25 for rotatably locking the pivot portion is provided, and the restricting member 25 is detachably fixed to the wall surface of the edge frame 2 by a screw 26 or the like. The upper end pivotal support of the suspension link 9 is slid along the vertical groove 22 in a state where the restricting member 25 is set at the restriction release position, so that the plurality of lateral grooves 18 to 21 can be moved. One can be selected to introduce the upper end pivot. Thereafter, by setting and fixing the regulating member 25 at the regulating position, the upper end pivotal support of the suspension link 9 can be locked in one of the lateral grooves 18 to 21. It can be stably supported by the lower link 9.

In particular, in the above embodiment, the restricting position for covering the lateral grooves 18 to 21 of the suspension bracket 13 and the lateral grooves 18 to 2
The restricting member 25 is configured to be displaceable to a restricting release position for opening the control member 1, and the restricting member 25 is moved upward by a temporary fixing portion including a V-shaped notch 29 formed in the restricting member 25. In this state, the upper end pivotal support portion of the suspension link 9 is slid along the vertical groove 22 in a state where the restricting member 25 is temporarily fixed at the restriction releasing position at the restriction releasing position. There is an advantage that the operation of selecting one of the plurality of lateral grooves 18 to 21 and introducing the upper end pivotal support of the suspension link can be easily performed.

8 and 9 in place of the above embodiment.
As shown in FIG.
And the restricting member 25 is set up and down between
A mounting bolt 26 screwed to the substrate 17 is screwed, and a tip end of the mounting bolt 26 is pressed against a wall surface of the regulating member 25 so that the regulating member 25 is temporarily fixed to an upper regulation release position. You may comprise. In the case of such a configuration, the regulating member 25 can be stably locked at the temporary fixing position by the temporary fixing portion including the mounting bolt 26.

In place of the regulating member 25, the lateral groove 18
Step 21 is provided for restricting the pivot pin 24 introduced into the horizontal grooves 18 to 21 from being drawn out of the lateral grooves 18 to 21. By this step, the upper end pivot of the suspension link 9 is turned to the lateral grooves 18 to 21. The pivot pin 24 may be configured to be slidable along the vertical groove 22 by being movably locked and moving over the step.

Further, as described above, a horizontal groove 32 extending in the horizontal direction and a front end of the horizontal groove 32 are provided on the support portion including the support bracket 35 for supporting the upper end portion of the tension spring 15 for urging the ladder main body 4 upward. By forming the vertical groove 33 extending downward from the portion, the rear end 3 of the horizontal groove 32 is formed.
2a or the lower end 3 of the vertical groove 33
In the case where the upper end of the tension spring 15 is selectively locked to the lower locking portion made of 3a, the urging force applied to the canopy 3 and the ladder main body 4 from the tension spring 15 can be easily increased. Can be adjusted.

That is, the hook member 34 that locks the upper end of the tension spring 15 can be connected to the lateral groove 32 provided in the support bracket 35 without requiring complicated operations such as removing the support bracket 35 from the edge frame 2. And flute 33
The sliding position along the guide groove made of the above makes it possible to easily change the locking position of the upper end of the tension spring 15, thereby easily adjusting the urging force of the tension spring 15. it can.

The support bracket 35 is provided with a locking portion composed of a plurality of upper and lower horizontal grooves and a guide groove composed of a vertical groove connecting the locking portions, which are constructed in substantially the same manner as the hanging bracket 13. By sliding the upper end of the tension spring 15 along the vertical groove, the upper end of the tension spring 15 may be selectively locked in one of the vertical grooves. The lower ring 12 of the suspension link 9 that supports the lower end of the tension spring 15 may have a structure in which a plurality of upper and lower locking portions and a guide groove that connects the locking portions are formed.

[0037]

As described above, according to the present invention, the edge frame attached to the opening of the ceiling, the frame is developed and bridged between the edge frame and the floor surface, and is folded over the ceiling. A ladder main body configured to be folded and stored, a suspension link configured to support the ladder main body with an upper end pivotally supported by the edge frame, and configured to bendable and extendable at an intermediate portion; and the ladder main body. In use, in a ceiling ladder device having a stopper that abuts the suspension link to prevent its rotational displacement, a suspension bracket that pivotally supports the upper end of the suspension link is provided on the edge frame, In this suspension bracket, a plurality of lateral grooves in which the upper end pivot portions of the suspension links are locked, and vertical grooves that connect the lateral grooves and guide the pivot portions are formed, and one of the lateral grooves is formed. Selectively lock the upper pivot of the suspension link Due to the configuration, by sliding and displacing the pivot portion along the vertical groove and locking it to one of the lateral grooves, the position of the upper end pivot portion of the suspension link is set corresponding to the distance between the edge frame and the floor surface. It is possible to easily and easily adjust the height of the ladder body so that the ladder body is properly bridged between the edge frame and the floor when the ladder body is used. It has the advantage that it can be performed accurately.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a ceiling ladder device according to the present invention.

FIG. 2 is an explanatory view showing a stored state of a ladder main body.

FIG. 3 is a front view showing a specific configuration of a suspension bracket.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a side cross-sectional view showing a state where the regulating member is temporarily fixed to a regulation releasing position.

FIG. 6 is a perspective view showing a specific configuration of a support bracket.

FIG. 7 is an explanatory diagram showing an expanded state of the ladder main body.

FIG. 8 is a front view showing a modification of the suspension bracket.

FIG. 9 is a longitudinal sectional view of the suspension bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling 2 Edge frame 4 Ladder main body 8 Floor surface 9 Suspension link 13 Suspension bracket 18-21 Side groove 22 Vertical groove 23 Stopper 24 Pivot pin (upper end pivot part) 25 Control member 29 Notch (temporary fixing part) 32 Side groove (temporary fixing part) Guide groove) 33 Inclined groove (guide groove) 32a Rear end of lateral groove (locking portion) 33a Lower end of inclined groove (locking portion) 35 Support bracket

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokuo Yamamoto 1-6-20 Dojima, Kita-ku, Osaka-shi Daiken Kogyo Co., Ltd. (72) Inventor Ryuichi Ueda 2-18-18 Mukono, Habikino-shi, Osaka Handa Corporation 403 F term (reference) 2E044 AA01 BA14 BB02 BC19 BC20 BC22 CA07 CB03 DA04 ED05 ED08 EE00

Claims (4)

[Claims] 1. An edge frame attached to an opening in a ceiling;
A ladder body configured to be unfolded and bridged between the edge frame and the floor surface and folded and stored above the ceiling, and a ladder whose upper end is pivotally supported by the edge frame. A ceiling ladder that supports the main body and has a suspension link that is configured to be able to bend and extend freely at an intermediate portion, and a stopper that abuts on the suspension link to prevent its rotational displacement when the ladder main body is used. An apparatus, wherein a suspension bracket for pivotally supporting an upper end of a suspension link is provided on the edge frame, and a plurality of lateral grooves on which the upper end pivot of the suspension link is locked, in the suspension bracket, A ceiling, wherein each of the lateral grooves is connected to form a vertical groove for guiding the pivot portion, and the upper end pivot portion of the suspension link is selectively locked in one of the lateral grooves. Ladder equipment. 2. The ladder device for a ceiling according to claim 1, further comprising a regulating member for locking an upper end pivot of the suspension link in the lateral groove. A ladder device for a ceiling, wherein the ladder device is configured to be displaceable between a restriction position for restricting the pivoting portion from being led out and a restriction release position where the restriction state of the pivot portion is released. 3. The ceiling ladder device according to claim 2, wherein the regulating member is configured to be displaceable between a regulating position for covering the vertical groove of the suspension bracket and a restriction releasing position for opening the vertical groove. A ceiling ladder device provided with a temporary fixing portion for temporarily fixing the restriction member at the restriction release position. 4. An edge frame attached to an opening in the ceiling;
A ladder body configured to be unfolded and bridged between the edge frame and the floor surface and folded and stored above the ceiling, and a ladder whose upper end is pivotally supported by the edge frame. A ceiling ladder device comprising a suspension link configured to bendable and extendable in an intermediate portion and a tension spring for urging the ladder body upward, the end supporting the tension spring. And a plurality of upper and lower locking portions for locking the ends of the tension spring, and guide grooves for connecting the locking portions and guiding the ends of the spring. And ceiling ladder equipment.