JPS6214174Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an elevating device for a transverse tide door that watertightly closes the opening of a sea wall, etc. installed on the coastline.

A conventional elevating device for a tide door will be explained as shown in FIG. That is, reference numeral 1 denotes a door body, and a handle 2 is disposed at approximately the center position, and a bevel gear provided on the handle shaft of the handle 2 allows
A bevel gear 3 meshed with the bevel gear is provided, and a transmission shaft 4 extending horizontally from side to side is rotated, and the torsional rotation of this transmission shaft 4 is applied to a bevel gear 5 provided at an end thereof in a vertical direction. This is converted into vertical movement via the connected lifting mechanism 6, and the wheel portions 7 connected to the lifting mechanism 6 are interlocked so as to appear and retract from the lower surface of the door body 1, thereby improving workability during lateral movement of the door body 1 and improving opening. This improves watertightness when the area is blocked. The lifting mechanism 6 is provided with a bevel gear 8 at its upper end that meshes with a bevel gear 5 provided at the end of the transmission shaft 4, and a thrust bearing 9 fixed at the lower end to prevent rotation, which is fixed to the door body 1. vertical axis 10 with
and a support shaft 12 whose upper end is inserted and screwed into this vertical shaft 10 and whose lower end is fixed to the upper part on the center line of a wheel holder box 11, which will be described later. It is composed of a box 11, a wheel 13 rotatably attached to the box 11, and a sliding surface 14 formed on the door body 1 and sliding when the box 11 moves up and down. The vertical movement dimension δ is ensured by rotation.

In such a conventional configuration, the wheel portion 7 is connected in series with the horizontal transmission shaft 4 via the lifting mechanism 6, so the lifting mechanism 6 and the wheel portion 7 are housed within the door body 1. However, a certain level of height is required, making it difficult to manufacture a short door body 1, resulting in a door body 1 having an unnecessary height. In addition, in the case of this type of door body 1 in which the wheels 13 are generally located on both sides, the transmission shaft 4 is long, so high durability is required, leading to increased cost or shortened lifespan. There was a drawback.

This idea was made in view of the above-mentioned drawbacks of the conventional technology, and it allows the wheel lifting device to be accommodated even if the height of the door body is low, and it also reduces the stress on the transmission shaft and the rotation of the handle to move the wheels up and down. The purpose of the present invention is to provide a device for lifting and lowering a tide door that can reduce force.

This invention will be explained in detail below based on the drawings. Note that the same reference numerals are given to the same or equivalent parts as in the conventional example.

FIG. 2 is a front view showing an embodiment of this invention, and two wheels 13 are disposed at the lower part near both ends of the door body 1 with a distance L between them. This wheel 13 is rotatably mounted on a shaft approximately in the middle of an arm rod 15 which is disposed approximately parallel to the position located downward by the height of the lifting mechanism 6 from the disposed end position of the transmission shaft 4. The armrest 1
One end of 5 is rotatably supported on a fulcrum 16 fixed to the end of the door body 1, and the other end is attached to the lower end of a support shaft 12 attached to a thrust bearing 9 that prevents the lifting mechanism 6 from rotating in the axial direction. The wheel 13 is rotatably supported on a shaft.
is supported so as to face from the lower part of the door body 1 by an elevation dimension δ.

To explain the effect of such a configuration, rotation of the handle 2 imparts torsional rotation to the transmission shaft 4, and via the bevel gear 5 and the bevel gear 8, the vertical shaft 10 integral with the bevel gear 8 is rotated. At this time, the vertical axis 10
Due to the action of the thrust bearing 9, the rotation of the vertical shaft 10 is not transmitted to the support shaft 12 which penetrates and is screwed into the support shaft 12, and only the upward movement is transmitted (see Fig. 3). The arm rod 15 is lifted up using the fulcrum 16 as a pivot point, and as a result, the wheels 13 are moved by the lifting distance δ and are housed in the lower part of the door body 1. Further, by reverse rotation of the handle 2, the wheels 13 are subjected to an action opposite to the above-mentioned action, and the wheels 13 are rotated on the door body 1.
The elevation dimension δ will be visible outside the lower part.

As mentioned above, this invention is compatible with the conventional system in which wheels are connected in series to a lifting mechanism by having the wheels pivoted on an arm rod with one end pivoted to the door body and the other end pivoted to the lifting mechanism. In contrast, since they are connected in parallel, these lifting devices can be housed in a low door body.Also, since the wheels can be made as large in diameter as possible, the lateral movement of the door body can be maintained stably, and the lateral movement of the door body can be maintained stably. It can be operated easily. In addition, due to the configuration in which the wheel is pivoted to the middle part of the arm rod, the distance between the fulcrum and the wheel's pivot point and the distance between the fulcrum and the arm's pivot fulcrum are l ₁ , respectively.
and l ₂ , the lifting force F is F=M×l ₂ /l ₁ (where M is the weight of the wheel), so if the distance l ₁ is made larger than the distance l ₂ , that is, the axis of the wheel If the landing point is moved away from the fulcrum, the value of the lifting force F can be reduced, which has the advantage of reducing the operating force of the handle.

Furthermore, by providing the arm rod, the transmission shaft can be shortened by the distance l ₃ from the wheel shaft attachment point of the arm rod to the other end, reducing design stress on the transmission shaft and reducing costs. Moreover, it has the effect of improving durability.

4A and 4B are a front view and a plan view of the main parts showing another embodiment of this invention, in which a horizontal support shaft 17 facing perpendicularly to the end of the transmission shaft 4 is pivoted to the door body 1. A bevel gear 18 that meshes with the bevel gear 5 provided at the end of the transmission shaft 4 is provided at the intermediate portion of the horizontal support shaft 17, and a bias cam that pivotally supports the other end of the arm rod 15 is provided at both ends. 19 are provided. That is, the biasing cam 1
9 is a semicircular recess 2 cut out in the upper part of the other end of the arm rod 15
0, is joined and pivoted so as not to come off, and
Its shape is approximately oval.

Even with such a configuration, the biasing cam 19 rotates due to the torsional rotation of the transmission shaft 4, and this rotation causes the biasing cam 19 to float or push down the arm rod 15 with the fulcrum 16 as a pivot point. This allows the wheels 13 to move in and out. Furthermore, in this case, compared to the embodiment described above, the lifting mechanism 6 does not have elements that serve as the vertical shaft 10 and the support shaft 12, so the storage height of the lifting device can be further reduced, and the structure is extremely simple. This effect is added.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the inside of a door body housing a lift device of a conventional tide door, Fig. 2 is a front view of the same as the above showing an embodiment of this invention, Fig. 3 is a partially enlarged view of Fig. 2, FIGS. 4A and 4B are a front view and a plan view of the main parts inside the door body showing another embodiment of this invention. 1... Door body, 2... Handle, 4... Transmission shaft,
5...Bevel gear, 6...Elevating mechanism, 8...Bevel gear,
9... Thrust bearing, 10... Vertical shaft, 1
2... Support shaft, 13... Wheel, 15... Arm rod, 16
...Fully point, 17...Horizontal support shaft, 18...Bevel gear,
19... Biased cam.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A transmission shaft extending from left to right inside the door body is rotated by a handle disposed approximately in the center of the door body, and the rotation of the transmission shaft is controlled from the end of the transmission shaft. In the transverse tide door, one end is pivoted to the door body and the other end is connected to the lifting mechanism. A lifting device for a tide door, characterized in that the wheel is pivotally attached to an intermediate portion of a pivotally supported arm rod. (2) The lifting mechanism has a vertical shaft having a bevel gear meshing with the bevel gear at the upper end and a thrust bearing fixed to the door body at the lower end, and the upper end thereof is inserted and screwed into the vertical shaft. The elevating device for a tide door according to claim 1, further comprising a support shaft whose lower end is pivotally supported by the other end of the arm rod. (3) The elevating mechanism is a horizontal support shaft provided with a bevel gear meshing with the bevel gear and a biasing cam, and the other end of the arm rod is pivotally supported via the biasing cam. A lifting/lowering device for a tide door according to claim 1 of the registered utility model, characterized in that: