JP2010209575A - Method and device for controlling friction of opening/closing door which falls object to be fallen by slidable contact therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problem of a conventional friction control device of an opening/closing door for falling an object to be fallen by slidable contact therewith wherein the object to be fallen is difficult to lower at any timing. <P>SOLUTION: This friction control device 2 of an opening/closing door includes fixed friction plates 4 and movable friction plates 3 which are disposed on the slidable contact surface of the opening/closing door 1 for falling the object to be fallen by slidable contact therewith in the direction of slidable contact and which are alternately arranged side by side in the direction orthogonal to the direction of slidable contact in which the object to be fallen is fallen, a moving means 7 for relatively moving the movable friction plates 3, and a control unit for driving and controlling the moving means. The friction control device 1 falls the object to be fallen by slidable contact therewith. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention lowers the bagging earth and sand at a desired sliding speed in the shutter for lowering the bagging earth and sand when the bagging earth and sand is lowered into the sea or underwater to construct a bank on the bottom of the sea (water). The present invention relates to a friction control method and apparatus for an open / close door that slides and lowers an object to be lowered.

  Conventionally, in order to construct a submerged dike etc. on the bottom of the water such as a dam or a lake and the sea bottom, as shown in FIG. 6, a bag body 48 filled with earth and sand, that is, bagging earth and sand 49 is put into the bottom 50 and stacked. It was. The bagging earth and sand 49 was introduced into the bottom 50 from near the water surface 51. In addition, as another method for setting bag-filled earth and sand, the invention of Japanese Patent Publication No. 6-43688 is known (see Patent Document 1).

  When the bagging earth and sand 49 is lowered by opening the shutter 52, it is necessary not to apply excessive tension to the cloth of the bag body 48 so as to avoid the risk of breakage of the bag.

Japanese Patent Publication No. 6-43688

  However, in the conventional lowering method, if the bag body 48 is to be lowered while the shutter 52 is sufficiently opened, it is necessary to increase the friction coefficient of the surface of the shutter 52. However, since the friction coefficient increases, the cloth at the bottom of the bag is pulled, and excessive tension is generated, which may increase the risk of breakage of the bag. Also, if the friction is large, the bagging soil may not slide down even if the shutter is opened to the required opening, and the timing of the falling of the bagging soil cannot be grasped. There is a problem that the padding earth and sand does not always slide down, and the influence of the falling position of the bagging earth and sand increases due to the influence. The open / close door friction control method and apparatus for sliding and lowering a descending object according to the present invention have been proposed in order to solve such problems.

SUMMARY OF THE INVENTION The gist for achieving the object by solving the above-mentioned problems of the door opening / closing door friction control method and apparatus for sliding down the object to be lowered according to the present invention is to slide the object to be dropped on the door. When lowering, prepare two types of sliding contact surfaces, a fixed friction plate and a moving friction plate, and further change the surface into a portion with a large friction coefficient and a portion with a small friction coefficient, which are the objects to be lowered. In addition to laying them alternately in a direction perpendicular to the direction in which the object is lowered, the friction coefficient of the entire open / close door is changed by moving the moving friction plate relative to the fixed friction plate.
The opening / closing door is not a sliding door but a single-opening door in which a single plate is opened or double-opening the double-opening door. The relative movement of the moving friction plate is performed while the door is inclined obliquely in order to shift the open / close door from the closed state to the open state. , It is performed by a moving mechanism by a driving means that slides, protrudes, or retracts one of them.

  According to the friction control method and apparatus for an open / close door that slides down and descends an object to be lowered according to the present invention, after opening the door, the moving device is driven in accordance with the timing of the fall, and the object to be lowered is safely In addition, the friction coefficient of the entire opening / closing door can be changed so as to be accurately lowered to a predetermined position.

It is a top view which shows the friction control structure of the opening / closing door 1 which slides the descent | fall object which concerns on this invention, and the upper part is the state before the sliding friction plate 3 with a large friction coefficient, and a lower part is the said moving friction It is a figure which shows the state after the slide of the board. In the same opening-and-closing door 1, it is the partial perspective view (A) and the partial perspective view (B) which shows the change before and behind the sliding of the moving friction board 3. FIG. It is sectional drawing of the door 1 and is sectional drawing (A), (B) of a moving friction board with a large friction coefficient, and a small fixed friction board. It is explanatory drawing (A), (B) which shows before and after the sliding friction board with a large friction coefficient slides in the state which the bagging earth-and-sand contacts the opening-and-closing door 1. It is sectional drawing (A) along the aa line in FIG. 3, intermediate sectional drawing (B), and sectional drawing (C) along cc line. Cross-sectional view of earth and sand loading vessel and loading frame, cross-sectional view (A) with shutter closed, explanatory cross-sectional view (B) showing lowering by friction control method of the present invention, and explanation showing lowering by conventional method It is sectional drawing (C). It is explanatory drawing which shows the descent method of the bagging earth and sand which concerns on a prior art example.

  As shown in FIG. 1, the friction control method and apparatus for an open / close door that slides an object to be lowered and slides down according to the present invention, as shown in FIG. In order to control the friction coefficient of the bag, so that the bagging earth does not slide down immediately with the opening of the shutter, when the opening angle reaches a certain degree, the bagging earth slides down after the shutter opens. It is what you want to do.

  As shown in FIGS. 1A and 1B, the friction control device 2 in the open / close door 1 for lowering the bagged earth and sand, which is an object to be lowered, according to the present invention, The metal shutter 1a and the sliding surface of the shutter 1a are divided into a portion with a large friction coefficient (hereinafter referred to as a moving friction plate, a friction coefficient of about 0.5 to 0.8) 3 and a portion with a small friction coefficient (hereinafter referred to as The fixed friction plate, the friction coefficient of about 0.1 to 0.3)) 4 are laid alternately in a direction orthogonal to the direction in which the descending object 5 is lowered.

  As shown in FIG. 2, the moving friction plate 3 and the fixed friction plate 4 are arranged like a comb blade like a keyboard of a piano, and one moving friction plate 3 is located outside along the sliding direction (see FIG. 2). 2 (A)). The fixed friction plate 4 is fixed to the shutter 1a and does not move. The friction coefficient of both friction plate surfaces is realized by sticking a flat thin plate material having a required friction coefficient to the sliding contact surface.

  The moving friction plates 3 are connected to every other adjacent moving friction plate 3 by a rigid connecting bar 6 horizontally mounted in the orthogonal direction. For example, the connecting bar 6 is slid toward the outside in the sliding contact direction by the hydraulic cylinder 7.

  When the moving friction plate 3 is slid, the hydraulic cylinder 7 is driven by a control device (not shown), the rod 7a is extended, the engaging portion 6a is pushed outward, and the connecting bar 6 is moved. It is moved outside in the sliding direction, and each moving friction plate 3 is slid.

  In this way, the door 1 is fixed to the shutters 1a, 1a provided at the bottom of the earth and sand loading ship and the loading frame with a long and narrow moving friction plate 3 having a required width having an inclined sliding contact surface and a triangular cross section. The friction plate 4, a connecting bar 6 as a moving means for sliding, a hydraulic cylinder 7, and a control device (not shown) for driving and controlling expansion and contraction of the hydraulic cylinder 7 are generally configured.

  With reference to FIG. 5 (A) and (B), the friction coefficient control method of the door 1 which concerns on this invention is demonstrated. FIG. 4A shows a state where the shutters 1a and 1a of the earth and sand loading ship and the loading frame 9 are closed. The shutter 1a is closed by an opening / closing bar 10. The shutter 1a rotates about a rotation shaft 9a provided at both ends of the bottom.

  From the closed state of the shutters 1a, 1a, as shown in FIG. 5B, the opening / closing bar 10 moves downward, and the shutters 1a, 1a expand about the rotation shaft 9a. Since the opening angle is still small, the packed soil 8 is stopped by the frictional force of the inclined surface of the shutter 1a.

  Further, the opening / closing bar 10 is lowered to open the shutters 1a and 1a. Then, the hydraulic cylinder 7 is driven by the control device to extend the 7a rod, and the connecting bar 6 is slid outward in the sliding contact direction.

  Thereby, as shown in FIG. 1-B (B), each moving friction plate 3 slides in the same direction. As a result, the sheet 8a of the bagging earth and sand 8 changes to a state as shown in FIG. 4 (A) to FIG. 4 (C), and the portion of the sheet 8a that contacts the moving friction plate 3 is reduced. Since the contact is mainly made, the friction coefficient of the shutter 1a as a whole becomes small, and the packed soil 8 becomes slippery.

  In this way, a part of the bagging earth and sand 8 descends downward from the opening portions of the shutters 1a and 1a that are sufficiently expanded, and the spire portion reaches the seabed 11. Furthermore, when the opening / closing bar 10 moves downward, the opening of the shutter 1a becomes large, and the whole of the bagging earth and sand 8 falls while the central portion is deformed.

  In this way, the opening / closing door 1 is moved by relatively moving the moving friction plate 3 out of the moving friction plate 3 having a large friction coefficient and the fixed friction plate 4 having a small friction coefficient. By changing the friction coefficient, after the shutters 1a and 1a are sufficiently expanded, the bagged earth and sand 8 can be controlled to fall smoothly downward. Thereby, it is prevented that the sheet 8a of the packed earth and sand 8 is pulled and broken. Moreover, the dropping position of the packed earth and sand 8 can also be controlled accurately.

  The open / close door 1 is not a sliding door, but has been described with a case of double doors. However, depending on the case, a single door with a single plate can be used. Further, at the timing of relatively moving one of the moving friction plate 3 having a large friction coefficient and the fixed friction plate 4 having a small friction coefficient, in order to shift the open / close door from the closed state to the open state, This is performed in the middle of the slanting.

  The relative movement of the moving friction plate is not limited to sliding one of the above-mentioned ones. For example, the fixed friction plate 4 having a smaller friction coefficient is pushed up with a jack to protrude, or the moving friction plate 3 This can be achieved by increasing the inclination angle and adjusting so as to sink.

  Further, as a method of changing the friction coefficient of the open / close door 1, in addition to the above, the fixed friction plate and the moving friction plate having different friction coefficients are alternately arranged, and the movable moving friction plate is moved from the inclined sliding contact surface. There are also ways to move backward and forward. In addition, when the moving friction plate 3 is formed in an arc shape of a part of a relatively large circle when viewed from the side, and when the door 1 is viewed from the side, the moving friction plate 3 moves upward from the surface of the fixed friction plate. The number of friction fluids in the open / close door 1 may be changed by retracting the arc-shaped portion of the moving friction plate 3 from between the fixed friction plates 4.

  Furthermore, although the friction plates 3 and 4 have been described as triangular inclined plates whose cross-sectional shape is tapered along the sliding contact direction, they may be rectangular flat plates without being particular about them.

  The friction control method and apparatus for an open / close door that slides and descends an object to be lowered according to the present invention is applied to the descent of bagged earth and sand by an earth and sand introduction ship and an introduction frame, but is not limited thereto, and is a general slip in logistics. It can also be used when handling objects.

1 door, 1a shutter,
2 friction control device,
3 A part with a large friction coefficient (moving friction plate),
4 Parts with a small coefficient of friction (fixed friction plate),
5 orthogonal direction,
6 connecting bar,
7 Hydraulic cylinder, 7a Rod,
8 Packed earth and sand,
9 Sediment input vessel and input frame,
10 Open / close bar,
11 The sea floor.

Claims (4)

Fixed friction that is provided along the sliding contact surface along the sliding contact surface of the open / close door that causes the object to slide and fall, and that is alternately laid in a direction perpendicular to the sliding contact direction that lowers the object. A plate and a moving friction plate;
A moving means for relatively moving the moving friction plate and a control device for driving and controlling the moving means;
A friction control device for an open / close door that slides down and descends an object to be lowered. The friction coefficient of the sliding contact surface of the moving friction plate is larger than the friction coefficient of the sliding contact surface of the fixed friction plate;
The friction control device for an open / close door that slides and descends the descending object according to claim 1. The cross-sectional shape of the fixed friction plate and the moving friction plate is a triangular inclined plate that tapers along the sliding direction.
The friction control device for an open / close door that slides and descends the descending object according to any one of claims 1 to 2. A friction control device for an open / close door that slides and lowers an object to be lowered according to any one of claims 1 to 3 is formed, and the moving means is driven and controlled by the control device during the transition from the closed state to the open state. Moving the friction plate to change the friction coefficient of the entire door,
A friction control method for an open / close door that slides down and descends an object to be lowered.

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