JPH0732880Y2 - Ceiling ladder equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a ceiling ladder device used when moving up and down above the ceiling.

[Conventional technology]

Conventionally, as a ceiling ladder device used when going up and down to the ceiling, an opening frame is provided in an opening formed in the ceiling, a rotatable lid plate is provided on one side of the opening frame, and a back side of the lid plate is provided. It is proposed that the upper ladder member is fixed to the upper ladder member and the lower ladder member is slidably provided on the upper ladder member (Japanese Patent Application No. 63-025421 (Actual Kaihei 1-129500).
No.) Bulletin). In this structure, a stopper is provided at the lower end of the side plate of the upper ladder member, and an engaging tool is provided at the upper end of the side plate of the lower ladder member so that the lower ladder member does not come off from the upper ladder member. I was doing. Further, the upper ladder member and the lower ladder member are connected by a wire.

[Problems to be solved by the device]

However, in this structure, the stopper provided on the upper ladder member and the engagement tool provided on the lower ladder member have a large protrusion to the outer surface of the side plate, and the appearance is unsightly. Further, the wire for connecting the upper and lower ladder members was exposed on the side surface of the upper ladder member, which impaired the appearance. In addition, when the lower ladder member is slid and lowered from the upper ladder member, the stopper must be removed and slid while the lower ladder member is supported by hand, which makes handling difficult. for that reason,
If you slide your hand during handling, the lower ladder member will slide down suddenly, which is extremely dangerous.

Therefore, an object of the present invention is to provide a ceiling ladder device which has an excellent appearance, is easy to handle, and is safe.

[Means for Solving the Problems]

The ceiling ladder device of this invention is provided with an opening frame in the opening formed in the ceiling, a rotatable lid plate is provided on one side of the opening frame, and an upper ladder member is provided on the back surface side of the lid plate. In the ceiling ladder device in which the lower ladder member is slidably provided on the upper ladder member, the upper end of the side plate of the upper ladder member and the opening frame are rotatably connected to both ends of the bracket, respectively, and the upper and lower ladder members are connected. A slide groove is formed on the outer surface of each side plate in the member longitudinal direction, and one of the pair of engaging members engaged over these slide grooves is fixed to the lower end of the upper ladder member, The other engaging member is fixed to the upper end of the lower ladder member and above the one engaging member, and a mainspring balancer is provided on the back side near the upper end of the side plate of the upper ladder member. A roller is provided around an axis connecting the bracket and the upper ladder member, and the extended end portion of the wire connected to the mainspring balancer is hooked on the roller to be housed in the slide groove, and the other engaging member. It is characterized by being fixed to a fitting.

[Action]

According to the configuration of the present invention, the slide groove is formed in the member longitudinal direction on the outer surface of each side plate of the upper and lower ladder members, and one of the pair of engaging members engaged over the slide groove is engaged with the engaging member. Since the other engaging member is fixed to the lower end of the upper ladder member and the other engaging member is fixed to the upper end of the lower ladder member, the pair of engaging members do not largely project to the outer surface of the side plate, and the appearance can be improved. Further, since the lower ladder member is connected to the mainspring balancer provided above via the wire, the lower ladder member does not suddenly slide down when the lid plate is opened, and the handling can be performed safely. Also, since it is connected to the mainspring type balancer, it can be operated with a small force and is easy to handle. Moreover, since the wire is housed in the slide groove of the upper ladder member, the wire is not exposed on the outer surface of the side plate, and the finger is not caught between the wire and the side plate. Therefore, it is possible to improve not only the appearance but also the safety during handling. Further, since the mainspring balancer is provided on the back side near the upper end of the side girder of the upper ladder member, the mainspring balancer does not become a hindrance when moving up and down. In addition, when the mainspring balancer is attached to the opening frame side, there is a problem that the wire is exposed and caught between the opening frame and the side girder, but since the mainspring balancer is provided on the upper ladder member as described above. Such problems are solved. In addition, since the mainspring balancer having the wires connected thereto is provided on the upper ladder member, the wire can be stored at a predetermined position without being displaced with respect to the slide groove regardless of the rotation angle of the upper ladder member. Therefore, the wire smoothly expands and contracts, and the lower ladder member is smoothly moved up and down. Further, since the roller is provided around the shaft connecting the bracket and the upper ladder member, it is not necessary to separately provide the shaft of the roller, and the roller can be mounted at the mounting position of the bracket.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view of the ceiling ladder device fixed to an opening frame, and FIG. 2 is a partial detailed view thereof.

The opening frame 1 is made of wood and is fixed along the inner circumference of the opening formed in the ceiling. A lid plate 2 is provided on one side of the opening frame 1.
One end of which is rotatably provided downward. Also, the opening frame 1
A bracket 3 is rotatably fixed to an upper part of the same one side of the above, and an upper end of an upper ladder member 4 is rotatably fixed to the bracket 3 via a bracket 6. A handrail 13 is fixed to the outer surface of the opening frame 1.

The lid plate 2 is provided with a latch 2a at its tip, and engages with a latch receiver (not shown) provided in the opening frame 1 in a closed state.
On the rear surface side of the cover plate 2, one end is rotatably provided, and the other end of the link member 9 is fixed to the side plate 4a of the upper ladder member 4. A plurality of adjustment holes 9a are formed in the link member 9,
The spring 11 having one end connected to the bracket 6 has the other end engaged with the adjustment hole 9a. The spring 11 is provided to prevent the lid plate 2 from opening suddenly, and is covered with a spring cover 12.

The upper ladder member 4 is formed by fixing a plurality of treads (not shown) between a pair of side plates 4a. A handrail 14 is provided on the outer surface of the side plate 4a. A slide groove 4b is formed on the outer surface of the side plate 4a in the member direction so as not to intersect with the handrail 14. A lower flange of an engaging member 7 having a groove-shaped cross section is engaged with the slide groove 4b. The wire 10 is housed in the slide groove 4b. As shown in FIG. 2, one end of the wire 10 is locked to the lower flange of the engaging member 8 and the other end is attached to the mainspring balancer 15 fixed to the lower surface of the side plate 4a of the upper ladder member 4. It is connected via a roller 16. The mainspring balancer 15 is provided on the back side near the upper end of the side plate 4a of the upper ladder member 4. Engagement tool 7
Has a lower flange engaged with the slide groove 4a and an upper flange engaged with the slide groove 5b of the lower ladder member 5. The engagement tool 7 has a lower flange side fixed to the upper ladder member 4.
It is fixed at 7a. The upper end of the upper ladder member 4 is the second
As shown in the drawing, a lower part is cut off from the slide groove 4b, and a roller 16 for engaging the wire 10 is provided around this shaft connecting the bracket 6 and the upper ladder member 4 to this part. .

The lower ladder member 5 is formed by fixing a plurality of treads (not shown) between a pair of side plates 5a. A slide groove 5b is formed on the outer surface of the side plate 5a in the member direction. An engaging member 8 is provided across the slide groove 5b and the slide groove 4b of the upper ladder member 4. The engagement tool 8 has its upper flange side fixed to the lower ladder member 5 with a fixing tool 8a (FIG. 2).

The operation according to this embodiment will be described. Upper and lower ladder members
When the latches 2a of the lid plate 2 are removed while the components 4 and 5 are stored under the ceiling, the lid plate 2 is gradually lowered and stopped at a predetermined opening angle. Pull out the lower ladder member 5 toward you. The lower ladder member 5 gradually slides and descends. Lower ladder member 5
The engaging tool 8 of the lower ladder member 5 is engaged with the engaging tool 7 of the upper ladder member 4 in a state where the lower end of the upper ladder is grounded to the floor. When accommodating the upper and lower ladder members 4 and 5, the lower ladder member 5 is slid upward with a small force by pulling the lower ladder member 5 slightly toward the front and pushing it upward, and overlaps with the upper ladder member 4. The lid plate 2 is closed by pushing up the lid plate 2 in this state, and the latch 2a engages with the latch receiver.

According to the configuration of this embodiment, the upper and lower ladder members
Slide grooves 4 in the member longitudinal direction on the outer surface of each side plate 4a, 5a of 4,5
b, 5b is formed, and of the pair of engaging members 7, 8 engaged over the slide grooves 4b, 5b, the engaging member 7 is fixed to the lower end of the upper ladder member 4, and the engaging member 8 is lowered. Since it is fixed to the upper end of the ladder member 5, the engaging members 7 and 8 do not significantly project to the outer surfaces of the side plates 4a and 5a, and are not conspicuous. Therefore, the appearance can be improved. Further, since the lower ladder member 5 is connected to the mainspring balancer 15 fixed to the upper ladder member 4 via the wire 10, the lower ladder member 5 does not slide down suddenly even when the cover plate 2 is opened.
Can be handled safely. Also, since the mainspring type balancer 15 is connected, it can be operated with a small force and the handling becomes easy. Moreover, since the wire 10 is housed in the slide groove 4a of the upper ladder member 4, the wire 10 is not exposed on the outer surface of the side plate 4a, and a finger is not caught between the wire 10 and the side plate 4a. Therefore, it is possible to improve not only the appearance but also the safety during handling.

In addition, the mainspring balancer 15 is attached to the side girder of the upper ladder member 4.
Since it is provided on the back side near the upper end of 4a, the mainspring balancer 15 does not get in the way when moving up and down. When the mainspring balancer 15 is attached to the opening frame 1 side, the opening frame 1
There is a problem that the wire 10 is exposed and caught between the side girder 4a and the side girder 4a. However, since the mainspring balancer 15 is provided on the upper ladder member 4 as described above, such a problem is solved. Further, since the mainspring balancer 15 to which the wire 10 is connected is provided on the upper ladder member 4 as described above, the wire 10 slides in the slide groove regardless of the rotation angle of the upper ladder member 4.
It can be put in place without displacement with respect to 4b. Therefore, the wire 10 is smoothly expanded and contracted, and the lower ladder member 5 is smoothly moved up and down. Further, since the roller 16 is provided around the shaft connecting the bracket 6 and the upper ladder member 4, it is not necessary to separately provide the shaft of the roller 16, and the roller 16 can be mounted at the mounting position of the bracket 6.

[Effect of device]

According to the ceiling ladder device of the present invention, the slide groove is formed in the outer surface of each side plate of the upper and lower ladder members in the longitudinal direction of the member, and one of a pair of engaging members engaged over the slide groove is engaged. Since the tool is fixed to the lower end of the upper ladder member and the other engaging tool is fixed to the upper end of the lower ladder member, the pair of engaging tools do not significantly project to the outer surface of the side plate, and the appearance can be improved. it can. Further, since the lower ladder member is connected to the mainspring balancer provided above via the wire, the lower ladder member does not suddenly slide down when the lid plate is opened, and the handling can be performed safely. Also, since it is connected to the mainspring type balancer, it can be operated with a small force and is easy to handle. Moreover, since the wire is housed in the slide groove of the upper ladder member, the wire is not exposed on the outer surface of the side plate, and the finger is not caught between the wire and the side plate. Therefore, it is possible to improve not only the appearance but also the safety during handling. Further, since the mainspring balancer is provided on the back side near the upper end of the side girder of the upper ladder member, the mainspring balancer does not become a hindrance when moving up and down. In addition, when the mainspring balancer is attached to the opening frame side, there is a problem that the wire is exposed and caught between the opening frame and the side girder, but since the mainspring balancer is provided on the upper ladder member as described above. Such problems are solved. In addition, since the mainspring balancer having the wires connected thereto is provided on the upper ladder member, the wire can be stored at a predetermined position without being displaced with respect to the slide groove regardless of the rotation angle of the upper ladder member. Therefore, the wire smoothly expands and contracts, and the lower ladder member is smoothly moved up and down. Further, since the roller is provided around the shaft connecting the bracket and the upper ladder member, it is not necessary to separately provide the shaft of the roller, and the roller can be mounted at the mounting position of the bracket.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a partial detailed view thereof. 1 ... Opening frame, 2 ... Lid plate, 4 ... Upper ladder member, 5
...... Lower ladder member, 4b, 5b …… Slide groove, 7,8 …… Engagement tool, 10 …… Wire, 15 …… Mainspring balancer

Claims (1)

[Scope of utility model registration request] 1. An opening frame is provided in an opening formed in a ceiling, a lid plate is provided on one side of the opening frame so as to be rotatable downward, an upper ladder member is provided on a rear surface side of the lid plate, and the upper ladder is provided. In a ceiling ladder device in which a lower ladder member is slidably provided on a member, upper ends of the side plates of the upper ladder member and the opening frame are rotatably connected to both ends of a bracket, respectively, and side plates of the upper and lower ladder members are provided. Slide grooves are formed on the outer surface of each of the members in the longitudinal direction of the member, and one of a pair of engaging members engaged in the slide grooves is fixed to the lower end of the upper ladder member, and the other engaging member is fixed. The fitting is fixed to the upper end of the lower ladder member and above the one engaging member, and the mainspring balancer is provided on the back side near the upper end of the side plate of the upper ladder member, and the bracket and the front part are provided. A roller is provided around the shaft connecting the upper ladder members, and the extended end portion of the wire connected to the mainspring balancer is hung on the roller and stored in the slide groove,
A ceiling ladder device characterized by being fixed to the other engagement tool.