JP6184564B1 - Sluice equipment - Google Patents

Abstract

An upper limit of an opening / closing load is improved by a sluice device that opens / closes using a chain. A sluice device (10) has a door body (14) that moves up and down via a chain (70) along an arcuate door stop (30). A roller 20 is attached, and a dynamic sprocket 24 is attached at a position on the ascending direction side of the roller 20. The dynamic sprocket 24 rotates around a shaft fixed to the door body 14 inside the door stop 30 and has a chain 70 wound around the opening / closing device 40 wound thereon. For this reason, the door body 14 is lifted and lowered via the chain 70 which is substantially formed by being wound around the dynamic sprocket 24. As a result, the load applied to the chain 70 can be reduced by about 1/2 compared with the case where the door body 14 is moved up and down via a single chain, so the upper limit of the opening / closing load of the door body 14 is approximately doubled. Can be improved. [Selection] Figure 2

Description

  The present invention relates to a sluice device having a door body that moves up and down along an arcuate door stop.

  When the door cannot be lifted high due to landscape reasons or because there is an obstacle such as a power transmission line at the top, the door is fully opened by raising and lowering the door along the arc-shaped door. A sluice facility is used in which the door position is kept lower than when the body is tilted and moved up and down vertically. As such a sluice facility, for example, the invention of Patent Document 1 has been proposed. The present invention solves the problems such as the landscape of the hydraulic cylinder system employed as an opening / closing device in a sluice apparatus having an arc-shaped door stop by adopting a chain system. On the other hand, Patent Document 2 discloses a detection device that detects looseness and overload of a chain in a sluice facility using the chain.

JP, 2014-101739, A Japanese Patent Laying-Open No. 2015-129390

  Here, the invention of Patent Document 1 has a configuration in which only one chain can be provided in the door stop. For this reason, the application range is limited due to the limit of the burden load per one chain, and there is a problem that it cannot cope with a large load as compared with the hydraulic cylinder method. Further, as disclosed in Patent Document 2 The detection device could not be installed. Further, in the invention of Patent Document 1, the chain is guided by a rail disposed in the door stop, but a roller is provided mainly as a sluice chain suitable for heavy loads. Since there is no bushed chain, there is a risk of wear on the inner surface of the chain or door when the chain slides. On the other hand, when a roller chain provided with a roller is used instead of the bushed chain, an increase in size or cost becomes a problem.

  This invention is made | formed in view of the said subject, The place made into the objective is to improve the upper limit of the opening-and-closing load in the sluice device opened and closed using a chain.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

  (1) A door body having rollers on both left and right sides is arranged in such a manner that the roller rolls inside the door block along a pair of left and right arc-shaped door blocks, via a chain wound up by an opening / closing device. A sluice device that moves up and down, wherein the door body is disposed on the left and right sides, on the ascending direction side of the roller, with a shaft fixed to the door body as a rotation axis, and disposed inside the door stop. A sluice device (Claim 1) including a dynamic sprocket to which the chain is wound.

  The sluice device described in this section is a sluice device having a door body that moves up and down via a chain along a pair of left and right doors provided in an arc shape. A roller that rolls inside is attached. Furthermore, dynamic sprockets are attached to the left and right sides of the door body at positions on the ascending direction side relative to the positions where the rollers are attached. This dynamic sprocket rotates around a shaft fixed to the door body inside the door stop, and a chain wound around by an opening / closing device is wound around the dynamic sprocket. For this reason, the door body is moved up and down via a chain that is substantially double-stranded by being wound around the dynamic sprocket on each of the left and right sides. As a result, the load applied to the chain is reduced by about 1/2 compared to the case where the door body is moved up and down via a single chain, so that the upper limit of the opening / closing load of the door body is improved about twice. Will be. In addition, since the dynamic sprocket around which the chain is wound is provided at a position on the ascending direction of the door body relative to the roller, the roller does not interfere with the chain.

  (2) In the above item (1), the chain includes a fixed-side end portion fixed to an end portion on the door body upward direction side of the door, and a winding-side end portion wound by the opening / closing device. And a sluice device in which at least a part of a portion from the fixed side end portion to the dynamic sprocket is in contact with an inner surface of the door at the arc center side (Claim 2).

  In the sluice device described in this section, the chain used for raising and lowering the door body has a fixed-side end and a winding-side end, and the fixed-side end is raised by the door body. The winding side end is fixed by an opening / closing device. Further, at least a part of the part from the fixed side end portion to the moving sprocket is in contact with the inner surface on the arc center side of the arc-shaped door. For this reason, the part from the fixed side end of the chain to the dynamic sprocket is gradually wound up via the dynamic sprocket from the state of contact with the inner surface of the center of the arc of the door as the door body rises. become. On the other hand, as the door body is lowered, the same part of the chain is gradually expanded on the inner surface of the door at the center of the arc through the moving sprocket, and is compactly accommodated inside the door. That is, in any case where the door body is raised or lowered, the chain does not slide greatly with respect to the inner surface on the arc center side of the door. For this reason, wear and damage to the inner surface of the chain and the door due to such sliding of the chain are suppressed.

(3) In the above item (2), the winding side end portion of the chain is a sluice device wound by the opening / closing device via a turning sprocket fixedly installed rotatably (Claim 3).
In the sluice device described in this section, the winding side end of the chain is, for example, via a turning sprocket that is fixedly installed so as to be freely rotatable, for example, above the end of the door on the side where the door rises. It is wound up by an opening / closing device. At this time, the position of the turning sprocket is either the part from the moving sprocket to the turning sprocket of the chain, the inner surface opposite to the arc center side of the door, or the part from the fixed side end of the chain to the moving sprocket. The position should not touch. That is, in the state where the door body is lowered most (fully closed state), the chain extends over a relatively long distance inside the door stop. In addition, a turning sprocket is installed at a position where the chain can be prevented from contacting the inner surface of the door. At this time, the design value may be reviewed while considering the arc radius of the arc-shaped door, the width between the inner surface on the arc center side of the door and the inner surface facing the arc, and the like. As a result, interference between the chains and contact with the inner surfaces of the doors of the chains are prevented.

(4) In the above items (2) and (3), an excess of the chain is determined on the basis of a flange member connected to the force point side of the fixed end of the chain and a force acting on the point of action of the rod member. A sluice device comprising a loose overload detection device for detecting a load and a looseness (claim 4).
The sluice device described in this section includes a gutter member and a loose overload detection device that detects overload and loosening of the chain. In this sluice device, as described in the above section (1), since the chain is wound around the dynamic sprocket provided on the door body, for example, a spring-type loose overload at the fixed side end of the chain A detection device is available. However, when a spring-type detection device is directly connected to the fixed side end of the chain, an open / close load that varies as the door body moves up and down acts directly on the spring from the fixed side end of the chain. For this reason, when the spring expands and contracts, the chain moves about several centimeters, that is, the chain slides with respect to the inner surface of the door, which may damage the chain and the inner surface of the door.

  Therefore, the sluice device described in this section does not directly connect the loose overload detection device to the fixed side end of the chain, but connects the fixed side end of the chain to the power point side of the heel member, and Connect the loose overload detector to the point of action. In other words, the eaves member is installed at the end of the door on the side of the door body ascending direction, and the length from the fulcrum to the action point is larger than the length from the fulcrum to the force point. As a result, the chain tension change due to overload or loosening is transmitted to the loose overload detection device as a larger displacement amount.On the contrary, the amount of expansion and contraction of the spring of the loose overload detection device is more It becomes smaller and is transmitted to the fixed side end of the chain. Therefore, wear and damage due to the sliding of the chain are suppressed to a small extent, and the chain life is extended. Furthermore, since the load transmitted to the loose overload detection device is reduced compared to the case where the chain is directly connected to the loose overload detection device, a small type of loose overload detection device corresponding to the load can be used. Well, it will save space. In particular, from the viewpoint of reliability, a loose overload detection device is provided on each of the left and right sides so as to detect the looseness and overload of the left and right chains.

(5) In the above item (3), based on the mounting base to which the turning sprocket is mounted, a support base for at least partially supporting the mounting base, and the load of the mounting base applied to the support base, A sluice device comprising a loose overload detection device for detecting overload and loosening of the chain (Claim 5).
The sluice device described in this section includes a loose overload detection device that detects overload and loosening of the chain, similar to the sluice device in (4) above, but the sluice device in (4) above In contrast, it does not detect the looseness or overload of the chain at the fixed end of the chain, but detects the looseness or overload of the chain using a turning sprocket through which the chain wound by the switchgear passes. is there.

  Specifically, a mounting base on which the turning sprocket is mounted and a support base for at least partially supporting the mounting base, and based on the load of the mounting base applied to the support base, the loose overload detection device Detects chain looseness and overload. That is, if the chain tension changes due to loosening or overload, the load on the mounting base on which the turning sprocket is mounted changes, and the load on the mounting base applied to the support base also changes. Based on this, it detects chain looseness and overload. The load on the mounting base applied to the support base is easily detected by, for example, supporting the mounting base at least partially by a spring connected to a loose overload detection device fixed to the support base. In addition, since the chain looseness or overload is not detected at the fixed end of the chain, the part from the fixed end of the chain to the dynamic sprocket is locked by the influence of the spring of the loose overload detection device. There is no sliding against the inner surface. Accordingly, it is possible to suppress the paint peeling and wear of the chain and to prolong the service life of the chain.

  Since this invention is the above structures, in the sluice device which opens and closes using a chain, it becomes possible to improve the upper limit of the opening and closing load.

BRIEF DESCRIPTION OF THE DRAWINGS The sluice device which concerns on embodiment of this invention is shown from the front direction, (a) is a schematic front view, (b) is an image figure in the position along the interlocking shaft which connects the right and left switchgear. . It is a schematic side view of the sluice device concerning an embodiment of the invention. It is the image sectional view which showed the door stop of the sluice device of FIG. 2 by the cross section orthogonal to the extending direction, (a) is a state where the roller is arranged inside the door stop, (b) is inside the door stop. The state where the dynamic sprocket is arranged is shown. It is a side image figure which shows the vicinity of the loose overload detection apparatus installed in the sluice device which concerns on embodiment of this invention. It is a side image figure which shows the vicinity of the loose overload detection apparatus installed in the position different from FIG. 4 of the sluice device which concerns on embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same parts or corresponding parts are denoted by the same reference numerals, and detailed description of the same parts as those of the prior art will be omitted.
1 and 2 schematically show a sluice device 10 according to an embodiment of the present invention. As shown in the drawing, the sluice device 10 includes a door stop 30 provided on the side walls 12 on both the left and right sides of the water channel, a door body 14 that opens and closes the water channel by moving up and down along the door stop 30, and a door body 14. And a chain-type opening / closing device 40 for moving up and down. As shown in FIG. 1B, the opening / closing device 40 is installed on a pedestal provided on the side walls 12 on both the left and right banks, one side being a driving side opening / closing device 40A and the other being a driven side. And is connected by an interlocking shaft 42. The driven opening / closing device 40B is rotationally driven via the interlock shaft 42 by a motor with a speed reducer (not shown) included in the driving opening / closing device 40A, thereby winding the pair of left and right chains 70, 70. The take-out or feeding operation is synchronized. In FIG. 1A and FIG. 2, the fully closed door body 14 is indicated by a solid line, and the fully open door body 14 ′ is indicated by a two-dot chain line.

  Each of the door stops 30 has an arc shape when viewed from the direction in which the side wall 12 is viewed from the front (see FIG. 2), and the rollers 30 are provided on the left and right sides of the door body 14. 20 (in this embodiment, a pair of upper and lower rollers 20, 20) rolls up and down the door body 14 along the door stop 30. That is, as can be confirmed in FIG. 3A, the roller 20 that rotates the interior of the door stop 30 provided on the side wall 12 around the shaft 20 a fixed to the door body 14 as the rotation axis moves the door body 14 up and down. As a result, it rolls upward or downward. Here, since the hydraulic load acting on the door body 14 is transmitted to the door stop 30 via the roller 20, an H-digit steel structure 36 is disposed in order to ensure sufficient strength, and is placed around the door 30. Support the load together with the concrete. Furthermore, in order to maintain the positional accuracy of the door body 14 in the left and right bank directions, a pair of side rollers 22 is provided on each of the left and right sides of the door body 14, and the door body 14 is provided with 30 waterway surfaces per door. It is structured to guide on the side.

  Further, on both the left and right sides of the door body 14, dynamic sprockets 24 are provided above the pair of upper and lower rollers 20, 20, that is, on the ascending direction side. Similar to the roller 20, the dynamic sprocket 24 is disposed inside the door stop 30, and a chain 70 extending from the chain-type opening / closing device 40 is wound around the dynamic sprocket 24. An end portion 72 of the chain 70 opposite to the opening / closing device 40 is fixed to the vicinity of the end portion 30a of the door stop 30 on the ascending direction side of the door body 14. For this reason, at least part of a portion (hereinafter also referred to as “fixed-side portion”) 70 a from the fixed-side end portion 72 of the chain 70 to the dynamic sprocket 24 is an inner surface on the arc center side of the arc-shaped door stop 30. 32 is brought into abutment.

  Further, as shown in FIGS. 1A and 2, a turning sprocket 50 is installed above the door body upward direction end 30 a of the door stop 30. The turning sprocket 50 is rotatably fixed on the upper part of the turning sprocket base 52, and a portion of the chain 70 extending from the dynamic sprocket 24 and wound up by the opening / closing device 40 (hereinafter referred to as “winding side”). 70b is wound around the turning sprocket 50. In addition, the installation position of the turning sprocket 50 is adjusted, for example, by the height of the turning sprocket base 52 so that the moving sprocket 24 disposed in the door stop 30 can be always seen linearly. Furthermore, the width of the door stop 30 (distance between the inner surface 32 and the inner surface 34) is sufficiently secured, and in the example of FIG. 2, the arc radius of the inner surface 32 of the arc-shaped door stop 30 on the arc center side. R is set to about 1.5 times the head H of the door body 14.

  Here, FIG. 3B shows the dynamic sprocket 24 arranged inside the door stop 30. The dynamic sprocket 24 rotates about a shaft 24a fixed to the door body 14 as a rotation shaft, and the chain 70 is wound around as described above. For this reason, FIG. 3B shows both the fixed side portion 70a and the winding side portion 70b of the chain 70, and the fixed side portion 70a is wound around the dynamic sprocket 24 for convenience. The part which contact | abutted to the inner surface 32 by the side of the circular arc of the door stop 30 and the circular arc center side is shown in figure. The inner surface 32 of the door stop 30 functions as a roller rail with which the roller 20 comes into contact as shown in FIG. 3A when the chain 70 is wound, but there is no problem in storing the chain 70. Thus, it is formed on a flat surface. Further, since both the roller 20 and the moving sprocket 24 shown in FIGS. 3 (a) and 3 (b) need to transmit a large load, the shaft 20a and the shaft 20a inserted sufficiently deep inside the door body 14 and It is attached to the door body 14 via 24a.

  Next, the configuration and operation of the chain 70 will be described in more detail. As described above, the chain 70 is wound around the dynamic sprocket 24 of the door body 14 inside the door stop 30, and the fixed side end 72 is the door body upward direction end 30 a of the door stop 30. The winding side end 74 opposite to the fixed side end 72 is wound by the opening / closing device 40. Since chain tension acts on the fixed side end 72, in order to support the tension with certainty, it is firmly fixed to the switchgear base, the turning sprocket base 52, etc., and has a sufficient strength. . The fixed side portion 70 a of the chain 70 from the fixed side end 72 to the dynamic sprocket 24 is in contact with the inner surface 32 on the arc center side of the door stop 30, and the winding side from the dynamic sprocket 24 to the opening / closing device 40. The portion 70b is wound around the turning sprocket 50.

  With the above-described configuration, when the chain 70 is wound by the opening / closing device 40 for the ascending operation of the door body 14, the chain 70 is gradually moved from the winding side end portion 74 via the moving sprocket 24 and the turning sprocket 50. It will be rolled up. Since it is a two-strip system using a dynamic sprocket, the winding amount of the chain wound by the opening / closing device 40 is about twice that of the single-strip system. Therefore, in this embodiment, the chain 70 is provided with a hook pin for each predetermined length and the hanger 46 is provided in the chain storage portion 44 so that the wound chain 70 can be stored compactly. The chain 70 is folded and stored in the portion 44. When the door body 14 is fully opened (the state of the door body 14 'indicated by a two-dot chain line), the rotation shaft of the motor with a speed reducer of the switchgear 40 is locked. On the other hand, when the door body 14 is closed, the door body 14 is lowered by its own weight by unlocking the rotation shaft of the motor with a speed reducer of the opening / closing device 40. At this time, the opening / closing device 40 performs the operation of drawing out the chain 70, and the chain 70 is spread on the inner surface 32 on the arc center side of the door stop 30 via the turning sprocket 50 and the moving sprocket 24.

  Next, with reference to FIG. 4 and FIG. 5, the loose overload detection devices 60 and 60 ′ installed in the sluice device 10 according to the embodiment of the present invention will be described. A safety mechanism is an indispensable element in the sluice device, and in the sluice device 10 that opens and closes by the chain 70, it is essential to detect looseness and overload of the chain 70. Further, as in the sluice device 10 according to the embodiment of the present invention, when the door body 14 is lifted and lowered by using separate chains 70 on both the left and right banks, the chain 70 is loosened and It is necessary to detect overload. Therefore, in this sluice device 10, loose overload detection devices 60 and 60 ', which are mechanical detection devices using springs 62, are used as a highly reliable safety mechanism considering the characteristics of the sluice. . In a sluice device that requires high reliability over a long period of time and has a relatively low use frequency, a mechanical detection method using a spring 62 rather than an electrical detection method using an electronic element. It is said that the reliability is higher.

  More specifically, FIG. 4 shows a loose overload detection device 60 that detects the looseness and overload of the chain 70 using the fixed side end 72 of the chain 70. In the loose overload detection device 60, the rod 66 is connected to the flange member 58 via the spring 62, and the fixed side end 72 of the chain 70 is also connected to the flange member 58. Specifically, the flange member 58 is installed on an opening / closing device mount, a turning sprocket table 52, and the like so as to be swingable about its fulcrum portion 58c, and one end 58a of the flange member 58 is connected to the fixed side end of the chain 70. The part 72 is connected, and the loose overload detection device 60 is connected to the other end 58b via a spring 62 and a rod 66. In the example of FIG. 4, the flange member 58 has a ratio of the distance from the fulcrum part 58c to the one end 58a and the distance from the fulcrum part 58c to the other end 58b of about 1: 5, and the one end 58a. Acts as the force point side of the scissors and the other end 58b acts as the side of the scissors action. That is, when the tension of the chain 70 is applied from the fixed side end 72 to the force point side 58a of the flange member 58, it is transmitted to the action point side 58b of the flange member 58, and further via the spring 62, the loose overload detection device. 60.

  On the other hand, FIG. 5 shows a slack overload detection device 60 ′ that detects the slack and overload of the chain 70 using the turning sprocket 50. That is, in the example of FIG. 5, the turning sprocket 50 is attached to the mounting base 54 that swings around the support pin 54 a, and the arm 54 b of this mounting base 54 is loosened over the spring 62 and the rod 66. A load detection device 60 'is connected. More specifically, the mounting base 54 is pivotally supported at one end side by a support pin 54a installed on the turning sprocket base 52, and an arm 54b extending from the other end side receives a spring 62 from the loose overload detection device 60 '. It is suspended and supported by a rod 66 that is suspended therethrough. The loose overload detection device 60 'is installed on a support base 64 provided on the switchgear base. As a result, when the chain 70 is loosened or overloaded, the mounting base 54 swings around the support pin 54a according to the change in the tension of the chain 70, and is installed on the rod 66 that supports the arm 54b of the mounting base 54. The formed spring 62 expands and contracts. In this way, the looseness and overload of the chain 70 are detected from the change in the load on the mounting base 54 transmitted to the loose overload detection device 60 ′ via the spring 62.

In the example shown in FIG. 5, the support pin 54a is a fulcrum, the portion of the mounting base 54 to which the turning sprocket 50 is attached is a force point, and the tip of the arm 54 acts as an action point. . Further, the mounting base 54 is divided and supported by the shaft support by the support pin 54a and the suspension support by the rod 66, and the load applied to the spring 62 is detected. However, the present invention is not limited to this. For example, a structure that detects the total load acting on the mounting base 54 may be used.
The above-described slack overload detection devices 60 and 60 'are both installed for each chain 70 installed on both the left and right banks, and the slack and overload of the chain 70 are independently detected on both the left and right banks. It comes to detect.

  Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. That is, the sluice device 10 according to the embodiment of the present invention includes a door body that moves up and down via a chain 70 along a pair of left and right doors 30 provided in an arc shape as shown in FIGS. 1 and 2. 14 (14 '), and rollers 20 that roll inside the door stop 30 are attached to the left and right sides of the door body 14. Further, on both the left and right sides of the door body 14, the dynamic sprocket 24 is attached at a position on the ascending direction side from the position where the roller 20 is attached. The dynamic sprocket 24 rotates around a shaft 24a (see FIG. 3B) fixed to the door body 14 inside the door stop 30, and a chain 70 wound up by the opening / closing device 40 is provided. It is wrapped around. For this reason, the door body 14 is lifted and lowered via the chain 70 which is substantially double-stranded by being wound around the dynamic sprocket 24 on each of the left and right sides. As a result, the load applied to the chain 70 can be reduced by about 1/2 compared with the case where the door body 14 is moved up and down via a single chain, so the upper limit of the opening / closing load of the door body 14 is approximately doubled. Can be improved. Moreover, since the dynamic sprocket 24 around which the chain 70 is wound is provided at a position on the ascending direction side of the door body 14 with respect to the roller 20, the roller 20 can be prevented from interfering with the chain 70.

  In the sluice device 10 according to the embodiment of the present invention, the chain 70 used for raising and lowering the door body 14 includes a fixed side end 72 and a winding side end 74, and the fixed side end 72 is fixed to the end 30 a of the door stop 30 on the side where the door body 14 is raised, and the winding side end 74 is wound by the opening / closing device 40. Further, in the chain 70, at least a part of a portion (fixed side portion) 70 a from the fixed side end 72 to the moving sprocket 24 is in contact with the inner surface 32 on the arc center side of the arc-shaped door stop 30. For this reason, the fixed side portion 70a of the chain 70 is gradually wound up via the moving sprocket 24 from the state in contact with the inner surface 32 on the arc center side of the door stop 30 as the door body 14 rises. Become. On the other hand, the fixed side portion 70a of the chain 70 is gradually expanded on the inner surface 32 on the arc center side of the door stop 30 via the dynamic sprocket 24 as the door body 14 is lowered, so that the interior of the door stop 30 is compact. Be contained. That is, in any case where the door body 14 is raised or lowered, the chain 70 does not slide greatly with respect to the inner surface 32 on the arc center side of the door stop 30. For this reason, wear and damage to the chain 70 and the door-contacting inner surface 32 due to such sliding of the chain 70 can be suppressed.

  Furthermore, in the sluice device 10 according to the embodiment of the present invention, the winding side end 74 of the chain 70 is fixedly installed rotatably above the end 30a of the door stop 30 in the example of FIG. It is wound up by the opening / closing device 40 via the turning sprocket 50. At this time, the position of the turning sprocket 50 is such that the portion from the moving sprocket 24 to the turning sprocket 50 of the chain 70 moves from the inner surface 34 opposite to the arc center side of the door stop 30 and the fixed side end 72 of the chain 70. The position up to the sprocket 24 is not touched. That is, particularly in the state where the door body 14 is lowered most (fully closed state), the chain 70 extends over a relatively long distance inside the door stop 30. The turning sprocket 50 is installed at a position where contact between the 70 and the chain 70 against the inner surface 34 of the door stop 30 can be avoided. At this time, the arc radius R of the arcuate door stop 30 and the width between the inner surface 32 on the arc center side of the door stop 30 and the inner surface 34 opposed thereto are reviewed, and the design values are reviewed. Also good. Thereby, it becomes possible to prevent interference between the chains 70 and contact with the inner surface 34 of the door 70 of the chain 70.

  Moreover, the sluice device 10 according to the embodiment of the present invention includes a gutter member 58 and a loose overload detection device 60 that detects overload and loosening of the chain 70, as shown in FIG. Here, the sluice device 10 according to the embodiment of the present invention, as described above, wraps the chain 70 around the dynamic sprocket 24 provided on the door body 14, and therefore, at the fixed side end 72 of the chain 70, For example, a spring-type loose overload detection device can be used. However, when a spring-type detection device is directly connected to the fixed side end portion 72 of the chain 70, an open / close load that varies as the door body 14 moves up and down acts directly on the spring from the fixed side end portion 72 of the chain 70. It will be. For this reason, when the spring expands and contracts, the chain 70 moves about several centimeters, that is, the chain 70 slides with respect to the inner surface 32 of the door stop 30, which may damage the chain 70 and the inner surface 32 of the door stop 30. .

  Therefore, the sluice device 10 according to the embodiment of the present invention shown in FIG. 4 does not directly connect the loose overload detection device 60 to the fixed-side end portion 72 of the chain 70, but to the power point side 58a of the eaves member 58. While connecting the fixed side end 72 of the chain 70, the loose overload detection device 60 is connected to the acting point side 58 b of the flange member 58 via the spring 62. That is, the eaves member 58 is installed at the end 30a of the door stop 30 on the door body ascending direction side, and the length from the fulcrum part 58c to the force point side 58a is the point of action from the fulcrum part 58c. The length up to the side 58b is 1/5 in the example of FIG. Thereby, the tension change of the chain 70 due to overload or loosening is transmitted to the loose overload detection device 60 as a larger displacement amount, and conversely, the expansion and contraction of the spring 62 of the loose overload detection device 60. The amount is smaller (1/5 in the example of FIG. 4) and is transmitted to the fixed side end 72 of the chain 70. Accordingly, wear and damage due to sliding of the chain 70 can be suppressed to a small extent, and the life of the chain 70 can be extended. Furthermore, compared with the case where the chain 70 is directly connected to the loose overload detection device 60, the load transmitted to the loose overload detection device 60 is reduced (1/5 in the example of FIG. 4). A small type of loose overload detection device 60 can be used, which saves space.

  On the other hand, the sluice device 10 according to the embodiment of the present invention shown in FIG. 5 includes a loose overload detection device 60 ′ that detects overload and loosening of the chain 70, similar to the sluice device 10 shown in FIG. 4. However, instead of detecting looseness or overload of the chain 70 at the fixed side end 72 of the chain 70, the turning sprocket 50 through which the chain 70 taken up by the opening / closing device 40 passes is used. It detects looseness and overload. Specifically, a mounting base 54 to which the turning sprocket 50 is attached and a support base 64 for at least partially supporting the mounting base 54, and based on the load of the mounting base 54 applied to the support base 64, Looseness and overload of the chain 70 are detected by the loose overload detection device 60 '. In the example of FIG. 5, the turning sprocket 50 is composed of a shaft support by a support pin 54 a installed on the turning sprocket base 52 and a suspension support via a spring 62 by a loose overload detection device 60 ′ installed on the support base 64. The mounting base 54 to which is attached is supported.

  With the configuration described above, when the tension of the chain 70 changes due to loosening or overload, the load on the mounting base 54 to which the turning sprocket 50 is attached changes, and the load on the mounting base 54 applied to the support base 64 is changed. That is, the load on the mounting base 54 applied to the spring 62 installed on the rod 66 that suspends the mounting base 54 from the support base 64 also changes. For this reason, the slack overload detecting device 60 ′ connected to the spring 62 can easily detect the slack or overload of the chain 70 based on the changing load applied to the spring 62. Further, since it does not detect the looseness or overload of the chain 70 at the fixed side end 72 of the chain 70, the chain 70 is moved from the fixed side end 72 of the chain 70 by the influence of the spring 62 of the loose overload detection device 60 '. The part up to the moving sprocket 24 does not slide with respect to the inner surface 32 of the door stop 30. Accordingly, it is possible to suppress the paint peeling and wear of the chain 70 and to expect a longer life of the chain. Further, the example of FIG. 5 utilizes the principle of scissors in which the support pin 54a acts as a fulcrum, the attachment part of the turning sprocket 50 of the mounting base 54 acts as a force point, and the tip of the arm 54b to which the rod 66 is connected acts as an action point. It has a structure. For this reason, the load applied to the loose overload detection device 60 ′ can be reduced, and the capacity standard of the loose overload detection device 60 ′ can be reduced as in the example of FIG.

  The sluice device 10 shown in FIGS. 1 to 5 is an example of the sluice device 10 according to the embodiment of the present invention, and does not limit the sluice device 10 according to the embodiment of the present invention. For example, the arc radius R of the inner surface 32 on the arc center side of the door stop 30, the width between the inner surface 32 and the inner surface 34 of the door stop 30, and the installation position of the turning sprocket 50 are limited to the example shown in FIG. 2. Even when the door body 14 is in the fully closed state, the winding side portion 70b of the chain 70 contacts both the inner surface 34 of the door stop 30 and the fixed side portion 70a of the chain 70. It is only necessary that the arrangement is not made. Further, when detecting the looseness or overload of the chain 70 using the fixed side end 72 of the chain 70, a flange member 58 that suppresses the displacement of the fixed side end 72 of the chain 70 is used. If it is, it will not be limited to the structure shown in FIG. Similarly, when the turning sprocket 50 is used to detect the looseness or overload of the chain 70, the tension change of the chain 70 transmitted to the turning sprocket 50 is applied to the loosening overload detection device 60 ′ via the mounting base 54. The configuration is not limited to the configuration illustrated in FIG. 5 as long as the configuration is transmitted.

10: Sluice device, 14, 14 ': Door body, 20: Roller, 24: Dynamic sprocket, 24a: Shaft, 30: Door stop, 30a: End part on the door body ascending direction, 32: Inner surface on the arc center side, 40 (40A, 40B): switching device, 50: turning sprocket, 54: mounting base, 58: saddle member, 58a: force point side, 58b: action point side, 60, 60 ': loose overload detection device, 64: support 70: Chain, 72: Fixed end, 74: Winding end

Claims (5)

A sluice in which a door body having rollers on both right and left sides moves up and down via a chain wound by an opening / closing device in such a manner that the roller rolls along the pair of left and right arc-shaped doors. A device,
The door body is provided with a moving sprocket disposed on the inside of the door stop, rotating on a shaft fixed to the door body at a position on the left side and on the ascending direction side with respect to the roller. A sluice device, wherein the chain is wound around a dynamic sprocket.   The chain includes a fixed side end fixed to an end of the door body in the ascending direction of the door, and a winding side end wound up by the opening and closing device, from the fixed side end. The sluice apparatus according to claim 1, wherein at least a part of a portion up to the moving sprocket is in contact with an inner surface of the door-side arc center side.   The sluice device according to claim 2, wherein the winding side end portion of the chain is wound by the opening / closing device via a turning sprocket fixedly installed rotatably.   A hook member connected to the force point side of the fixed side end of the chain, and a loose overload detection device that detects overload and loosening of the chain based on the force acting on the action point side of the hook member; The sluice apparatus according to claim 2 or 3, characterized by comprising: Based on a mounting base on which the turning sprocket is mounted, a support base for at least partially supporting the mounting base, and a load on the mounting base applied to the support base, overload and loosening of the chain are detected. The sluice device according to claim 3, further comprising a loose overload detection device.

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