JPH064000Y2 - Storage ladder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a so-called stowage-type ladder in which the step portion can be made compact when not in use and can be easily extended when in use. The present invention provides a storage ladder that is particularly suitable for being fixedly installed on a pillar or a wall and always installed.

(Prior art) If there is a place where workers regularly inspect, such as power distribution equipment and switches in steel towers, elevated roads, bridges, etc., at a high place, a ladder for raising and lowering is always installed. , It is desirable that this kind of ladder is designed so that no one other than workers and related persons can easily climb up in order to prevent intrusion of a third party.

In this respect, the conventional ladders used for this kind of application have no particular improvement in these points, and are merely general ladders in which step members are simply provided at equal intervals on both sides of the frame.

(Problems to be solved by the invention) Therefore, in order to prevent a third person from going up and down, the lowest step of the ladder, which is always installed, should be set higher than the ground in advance so that a worker can climb it. There was no choice but to take the procedure of separately preparing an appropriate auxiliary ladder and climbing up to the installed ladder using this auxiliary ladder.

However, as long as such a procedure is adopted, it is necessary to carry an auxiliary ladder one by one, and it is troublesome to hang or remove the auxiliary ladder.

(Means for Solving the Problems) The present invention has been made in view of the above point, and each step is stored above when not in use, but when used, it can be easily pulled down and used. It aims to solve the problem by providing a storage ladder that can be used.

Thus, regarding the specific configuration thereof, a plurality of movable step members that are slidable in the longitudinal direction in the opening are passed between guide frames facing each other with the longitudinal opening facing each other. Both sides of the material are connected via a link material, and the projecting length of each guide pin that bears the mutual link material on the outside of the guide frame, that is, the front side or the back side of the guide frame is determined by It is set so that it touches the edge of the guide frame when viewed from the back), the uppermost movable step material is connected to the fixed step material provided on the upper part of the guide frame, and when each link material is contracted, the lowermost movable step material is moved. The storage ladder is characterized in that a stopper capable of projecting on the lower surface of the step material is provided on the guide frame.

(Operation) Since each movable step member is slidable in the longitudinal direction of the guide frame, and each movable step member is connected by the link member, each movable step member is in a normal state, that is, when not in use. The material can be pushed up, and the stopper provided on the guide frame can freely project to the lower surface of the movable step material at the lowest stage when each link material contracts. If it is projected, the lowermost movable step member is supported by the stopper, and the contracted state is maintained as it is.

In use, when the lowermost movable step material of the stopper is released from the protruding state to the lower surface, each link material expands, and each movable step material falls along the longitudinal direction of the guide frame due to its own weight. To do. In this state, the structure as a ladder is completed.

At this time, since the link members are axially attached to each other by the guide pins outside the guide frame, and the projecting length of the link members is the length of the edge of the guide frame, the link members do not completely extend and It stops when the pin comes into contact with the edge of the guide frame.

Thus, when accommodating each movable step material, each movable step material may be pushed up and the stopper may be projected again on the lower surface of the lowermost movable step material. In this case, as described above, since each link member is not completely extended and has a corrugated shape when viewed from the side, so-called reverse bending occurs when each movable step member is pushed up and stored. There is no such thing.

If the stopper is a so-called lift-up type and is configured to be constantly projected by being urged by a spring or the like, it will not become an obstacle when pushing up and it will no longer fall when the movable step passes the stopper. The effect of not doing can be easily realized.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. First
The figure shows from the front a state in which the storage ladder 1 according to this embodiment is fixed to an appropriate wall 2. Reference numerals 3 and 4 denote guide frames on both sides, and in the present embodiment, each has a configuration in which the open end portions of a steel material having a U-shaped cross section are respectively bent inward, and a kind of hollow portions 5 and 6 are provided inside. Is formed. The guide frames 3 and 4 are fixed to the wall 2 by mounting fittings 7 with their longitudinal openings facing each other. Reference numeral 8 is a fixed step member which is fixed between the guide frames 3 and 4 and serves as the uppermost step.

The link members 9 and 10 located at the uppermost part are rotatably pivoted about the fixed step member 8 at the positions where one ends of the link members 9 and 10 are close to the insides of the guide frames 3 and 4, respectively. On the other hand, the other ends of the link members 9 and 10 are located outside the front side of the guide frames 3 and 4 (on the right side in FIG. 2) by the one ends of the other link members 11 and 12 and the guide pins 13 and 14. It is pivotally mounted and rotatable.

The other ends of the link members 11 and 12 are passed between the hollow portions of the guide frames 3 and 4 and are pivotally mounted around a movable step member 15 which is slidable in the hollow portions in the longitudinal direction as an axis. Is.
As shown in FIG. 3, the sliding condition of the end portions of the movable step member 15 is such that the movable step member 15 is slidable in the longitudinal openings of the guide frames 3 and 4 near the both ends thereof. , And the roller 16 is screwed to both ends of the movable step member 15 in each of the hollow portions 5 and 6, and then the split pin 17 is mounted.

In addition, one end of the other link members 18 and 19 is pivotally mounted around the movable step member 15 as an axis, and the other ends thereof are located outside the front side of the other link members 20 and 21 and the guide frames 3 and 4 ( At the right side in FIG. 2), they are pivotally mounted by guide pins 22 and 23, respectively. In the same manner, a plurality of other link members 24, 25, 26, 27, etc. are rotatably pivoted at their both ends by respective movable step members 28 and guide pins 29, 30 alternately. It is attached to the guide frames 3 and 4. This is shown in FIGS. 4 and 5. Further, the movable step member 31 is arranged at the lowest stage of the movable step group configured as described above. Below the movable step material 31, a fixed step material 32 is further provided.
Is passed between the guide frames 3 and 4 and fixed.

The outwardly projecting end portions of the guide pins 13, 14, 22, 23, etc. are set so as to hang on the inner end portions of the guide frames 3, 4 when viewed from the front, respectively.

6 and 7 show details of the locking device 41 equipped with a stopper. In this embodiment, the guide frames 3 and 4 are equipped respectively, and these are interlocked by the connecting rod 42 to be the maximum. The lower movable step material 31 is locked.
This is specifically a locking device 41 provided on the guide frame 4 side.
The window 43 is formed on one side of the guide frame 4, and a mounting bracket 45 having covers 44, 44 facing each other is fixed to the periphery of the window 43 by an appropriate fixing member 46. In between, a stopper 48 having one end protruding into the guide frame 4 and having a notch 47 at the other end is rotatably provided, and this is constantly urged by a spring 49 in the direction of the arrow X in the drawing to form a notch. The end portion on the 47 side is brought into contact with an appropriate locking body 50.

The rotatability of the stopper 48 is the cover of the connecting rod 43 described above.
The portion inside 44, 44 is made square, and the stopper 48 and the connecting rod 42 are fixed at this portion, and the connecting rod 42 itself is covered.
It is configured to be rotatable with respect to 4.
The locking device 41 having the same configuration is provided on the guide frame 3 side, and the connecting rod 43 is shared.

Further, as shown in FIGS. 7 and 8, the setting position of the locking device 41 is such that when the link members 9, 26, etc. are all folded and contracted upward, the movable step member 31 at the lowermost stage is set. It is a place where the upper surface of one end of the stopper 48 enters below and can support it.

This embodiment is configured as described above. In the normal state, that is, when not in use, as shown in FIG. 8, if all the link members 9, 26, etc. are bent and contracted upward, The contracted state is maintained by the stopper 48 of the stopper 41. When used as a ladder, the notch 47 side of each stopper 48 is pulled down by an appropriate member against the biasing force of the spring 49, and the stopper 48 releases the support of the movable step member 31, After that, each movable step material 31, 28, 15 by its own weight
Drops along the longitudinal direction of the guide frames 3 and 4 together with the link members 9 and 26 and creates a structure as a ladder.

In this embodiment, the connecting rods 42 can simultaneously release the locked and supported states of the guide frames 3 and 4 by the stoppers, so that the movable step members 15, 28 and 31 can be smoothly pulled down.

As is clear from FIG. 2 in the pulled-down state, the projecting end portions of the guide pins 13, 14 and the like are in contact with the edges of the guide frames 3 and 4, respectively. As a result, each link material 9, 10, 11, 12, 18, 19, 20, 21, 24, 25, 26, 27 will be bent at the shaft attachment portion, but each movable step material 15, 28, 31 will be a guide. Since they are arranged at equal intervals in the vertical direction along the longitudinal openings of the frames 3 and 4, the steps themselves are no different from ordinary ladders, and there is no discomfort when going up and down. Moreover, both ends of the movable step members 15, 28, 31 are sufficiently supported by the guide frames 3, 4, respectively, and the ends of the guide pins 13, 14 etc. are in contact with the edges of the guide frames 3 or 4, respectively. There is almost no rattling when moving up and down.

When storing each movable step material 15, 28, 31 by pushing the lowermost movable step material 31 upward with an appropriate long tool, each movable step material 15, 28 etc. is locked in order. Device 4
Although it comes in contact with the stopper 48 of 1, the stopper 48 is still pushed up against the urging force of the spring 49 to pass the lowermost movable step material 31, and the stopper 48 is guided by the guide frame 3,
Since it protrudes into the hollow portions 5 and 6 of 4 and is located on the lower surface of the movable step material 31, it eventually supports all the movable step materials. Storage is completed at this stage. In this case, as described above, since the link members 9, 10 and the like are bent at the shaft-attaching portions in the state in which the movable step members are pulled down, the direction of contraction is constant even when pushing up, so-called reverse bending is prevented, The contraction operation can be performed smoothly.

Further preferably, the intermediate movable step material 28 is first pushed up, the movable step material 28 is temporarily locked by the stopper 48, and then the lowermost movable step material 31 is pushed up to store all the movable step materials. The storage work can be done smoothly by following the procedure.

As a long tool for smoothly performing such work, for example, an operating rod 61 as shown in FIG. 9 can be proposed. The operating rod 61 is configured so that it can be separated at the center, and an upper hook 62 and a lower hook 63 are fixed to the upper part in opposite directions, while a grip 64 is fixed to the lower part. Is.

The hook 62 facing upward is for pushing up, just put the lowermost movable step material 31 in the hook 62 and lift the operating rod 61 as it is, and the hook 63 is for pulling down, the notch of the stopper 48 It is designed so that it can be hooked on the part 47 and pulled down as it is.

Incidentally, in the above embodiment, if the guide frame is appropriately lengthened and the number of each link material and movable step material is increased, it is possible to provide a ladder suitable for this kind of application alone,
In that case, if a stopper is provided in the middle as appropriate,
The stopper itself of the locking device is not overloaded, and the work of pulling down and pushing up can be done smoothly.

Further, when the above-mentioned embodiment is used as an auxiliary ladder, a normal installation type ladder may be provided above the uppermost fixed step member 8. By doing so, the length of the ladder according to the above embodiment can be minimized.

(Effect of Device) According to this device, each movable step member can be pushed up and stored when not in use. Third parties cannot easily go up and down.

When used, a structure as a ladder is automatically created only by releasing the support of the lowermost movable step member by the stopper.

When the movable step members are pushed up and stored again after use, the link members are not folded back and the storing operation can be performed smoothly.

[Brief description of drawings]

1 to 8 are all related to an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is the same line BB. Sectional view, FIG. 4 is an enlarged vertical cross-sectional side view of the storage ladder, and FIG.
6 is a partial sectional plan view of the locking device, FIG. 7 is a sectional side view of the same portion, FIG. 8 is a sectional side view of a storage ladder showing a state in which each movable step material is stored, and FIG. It is a front view of a stick. In the figure, 1 is a storage ladder, 3 and 4 are guide frames, 5, and
6 is a hollow part, 8 is a fixed step material, 9, 10, 11, 12, 18, 1
9, 20, 21, 24, 25, 26, 27 are link materials, 13, 14, 22, 23, 28, respectively.
29 is a guide pin, 15, 28 and 31 are movable step members,
16 is a roller, 17 is a split pin, 41 is a locking device, 42 is a connecting rod,
47 is a notch, 48 is a stopper, 49 is a spring, and 61 is an operating rod.

Claims (1)

[Scope of utility model registration request] 1. A plurality of movable step members, which are slidable in the longitudinal direction through the openings, are passed between guide frames facing each other with the longitudinal openings facing each other, and linking members are provided on both sides of each movable step member. The guide pins that bear the mutual link material on the outside of the guide frame so that they project from the front of the guide frame to the edges of the guide frame. The material is connected to a fixed step material provided on the upper part of the guide frame, and further, a stopper is provided on the guide frame on the lower surface of the lowermost movable step material when each link material is contracted. , Storage ladder.