JP2011196413A - Hydraulic cylinder resting device and door body opening-closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely hold and release a resting state of a piston in a hydraulic cylinder, in a simple constitution.SOLUTION: This hydraulic cylinder resting device includes a hook part 2 extending in the moving direction of a piston 103b from the tip of the piston 103b of the hydraulic cylinder 103 and having an outward projected projection 2a crossing with the moving direction, a hook receiving part 3 movable to a resting position for abutting on the projection 2a of the hook part 2 moving in response to the movement of the piston 103b or a release position for allowing the movement of the projection 2a of the hook part 2 in response to the movement of the piston 103b, and an operation part 4 for moving the hook receiving part 3 by manual operation from an external part of the hydraulic cylinder 103. In the form wherein the piston 103b is moved to a position for contractively operating a piston rod 103c, the piston 103b is held in a resting state by moving the hook receiving part 3 to the resting position through the manual operation of the operation part 4. While, the resting state is released by moving the hook receiving part 3 to the release position by through manual operation of the operation part 4.

Description

  The present invention relates to a hydraulic cylinder pause device that mechanically pauses and releases a piston in a hydraulic cylinder, and a door body opening and closing device that opens and closes a door body by a hydraulic cylinder including the hydraulic cylinder pause device.

  Conventionally, for example, Non-Patent Document 1 discloses a manual detachable type and a hydraulic detachable type attached to the top of a hydraulic cylinder as a hydraulic cylinder resting device (hydraulic cylinder built-in resting device). In the manual detachable type, by manually turning the handle in a state where the piston rod in the hydraulic cylinder is contracted, the idle screw rod is screwed into the internal thread portion of the piston and the piston is held at the idle position. On the other hand, in the hydraulic detachable type, the piston rod in the hydraulic cylinder is contracted, and the piston is held at a rest position by a mechanism operated by hydraulic pressure. There are a ball method, a press rod method, and a slide hook method.

Gate opening and closing device (hydraulic) design guidelines (draft), Japan Dam and Weir Facility Technology Association, June 2000, p289-290

  However, the manual detachable hydraulic cylinder resting device cannot be screwed into the female threaded part unless the piston is correctly retracted to the resting position. Conversely, when the resting is released, the screw may not be loosened. There is. On the other hand, the hydraulic detachable hydraulic cylinder deactivation device has a problem that the mechanism operated by hydraulic pressure becomes complicated and the manufacturing cost increases.

  The present invention solves the above-described problems, and provides a hydraulic cylinder pausing device and a door body opening / closing device that can easily and reliably hold and release a piston pausing state in a hydraulic cylinder with a simple configuration. With the goal.

  In order to achieve the above-described object, in the hydraulic cylinder deactivation device according to the present invention, the protrusion extending from the piston tip of the hydraulic cylinder along the moving direction of the piston and protruding outwardly intersecting the moving direction is provided. A hook portion having a hook position and a rest position that contacts the protrusion of the hook portion that moves with movement of the piston, or a release position that allows movement of the protrusion of the hook portion with movement of the piston. A hook receiving portion and an operation portion for moving the hook receiving portion by manual operation from the outside of the hydraulic cylinder, wherein the piston is moved to a rest position of a piston rod of the hydraulic cylinder. By moving the hook receiving portion to a rest position by manual operation, the piston is held in a rest state, while by manually operating the operation portion. Serial and cancels the dormant state of the piston by moving the hook receiving portion to the release position.

  According to this hydraulic cylinder resting device, the hook receiving part is moved by manual operation of the operating part between a resting position that restricts the movement of the protrusion of the hook part and a release position that allows the movement of the protrusion of the hook part. . For this reason, there is no inconvenience such as breakage due to biting between the resting screw rod and the female threaded portion unlike the conventional manual detachable hydraulic cylinder resting device. In addition, unlike the conventional hydraulic detachable hydraulic cylinder deactivation device, a manual operation is performed without a mechanism that is operated by hydraulic pressure, so that the configuration is simplified and the manufacturing cost can be reduced. As a result, it is possible to easily and surely hold and release the piston in the resting state in the hydraulic cylinder with a simple configuration.

  Moreover, according to the hydraulic cylinder resting device, the piston is held in a resting state by the hook receiving portion coming into contact with the protrusion of the hook portion. For this reason, in the unlikely event that a malfunction occurs in which the hook receiving portion and the protrusion are caught and the piston cannot be released, the piston can be released immediately by breaking the hook portion with hydraulic pressure. By attaching a new hook portion, the configuration for bringing the piston into a resting state can be immediately restored. In the conventional manual detachable hydraulic cylinder resting device, when the resting screw rod and the female threaded portion are engaged, both are replaced, so that the restoration work is troublesome and the restoration cost increases.

  Further, in the hydraulic cylinder deactivation device according to the present invention, the hook portion is provided with a protrusion protruding partly outwardly intersecting the moving direction of the piston, and the hook receiving portion rotates around the hook portion. It is fixed to a rotating member and is provided so as to be able to move to the rest position or the release position as the rotating member rotates, and the operation unit rotates the rotating member within an operation range of one rotation, so that the rest position or the release The hook receiving portion is movably provided at a position.

  According to this hydraulic cylinder resting device, the hook receiving part can be moved to the resting position or the releasing position by rotating the operation part to one side or the other within the range of one rotation. For this reason, a rest position and a release position can be confirmed by the rotation direction and rotation position of the operation unit. In the conventional manual detachable hydraulic cylinder pause device, the handle is rotated several times to screw the pause screw rod and the female screw portion, and the screw engagement between the pause screw rod and the female screw portion cannot be visually observed. In addition, it is not possible to easily confirm whether the piston is stopped or released in the hydraulic cylinder.

  In the hydraulic cylinder pausing device of the present invention, a rotating member that rotates around the hook portion, and a moving mechanism that moves the hook receiving portion to the pausing position or the releasing position as the rotating member rotates. The operation portion is provided so that the hook receiving portion can be moved to the rest position or the release position via the moving mechanism by rotating the rotating member within an operation range of one rotation. .

  According to this hydraulic cylinder resting device, the hook receiving part can be moved to the resting position or the releasing position by rotating the operation part to one side or the other within the range of one rotation. For this reason, a rest position and a release position can be confirmed by the rotation direction and rotation position of the operation unit. In the conventional manual detachable hydraulic cylinder pause device, the handle is rotated several times to screw the pause screw rod and the female screw portion, and the screw engagement between the pause screw rod and the female screw portion cannot be visually observed. In addition, it is not possible to easily confirm whether the piston is stopped or released in the hydraulic cylinder.

  Further, the hydraulic cylinder pausing device of the present invention is characterized by including a detecting unit that detects the pausing position and the releasing position of the hook receiving unit in response to the operation of the operating unit.

  According to this hydraulic cylinder deactivation device, it is possible to easily confirm whether the piston is deactivated or released in the hydraulic cylinder.

  Further, in the hydraulic cylinder resting device of the present invention, the piston is moved to the position where the piston rod of the hydraulic cylinder is most contracted and moved between the hook receiving part moved to the resting position and the protrusion of the hook part. Further, a gap in the moving direction of the piston is provided.

  According to this hydraulic cylinder pausing device, even when there is residual pressure in the cylinder head portion and the piston does not reach the position where the piston rod can be most contracted, the hook receiving portion is placed in the pausing position without interfering with the protrusion in the gap. It is possible to move to. As a result, it is possible to reliably hold and release the piston in the resting state in the hydraulic cylinder. In the conventional manual detachable hydraulic cylinder resting device, when there is residual pressure in the cylinder head portion and the positions of the resting screw rod and the female screw portion are not aligned, there is a possibility that they cannot be engaged with each other. In addition, since a gap is provided between the hook portion and the hook receiving portion, accurate position (opening) management is not required.

  In order to achieve the above-described object, in the door opening / closing device of the present invention, the door is fixed to the piston rod of the hydraulic cylinder, and the door is opened or closed as the piston rod extends or contracts. In the opening / closing device, the hydraulic cylinder deactivation device according to any one of the above is applied in a mode in which the deactivation state of the piston of the hydraulic cylinder is maintained or released.

  According to this door body opening and closing device, it is possible to easily and surely hold and release the resting state of the piston in the hydraulic cylinder with a simple configuration.

  According to the present invention, it is possible to easily and surely hold and release the resting state of the piston in the hydraulic cylinder with a simple configuration.

FIG. 1 is a side sectional view of a door opening and closing device according to the present invention. FIG. 2 is a plan view of the hydraulic cylinder deactivation device according to Embodiment 1 of the present invention. 3 is a cross-sectional view taken along the line II in FIG. 4 is a cross-sectional view taken along the line II-II in FIG. 5 is a cross-sectional view taken along line III-III in FIG. FIG. 6 is a plan view showing the operation of the hydraulic cylinder resting apparatus according to the first embodiment. 7 is a cross-sectional view taken along the line IV-IV in FIG. 8 is a cross-sectional view taken along the line VV in FIG. FIG. 9 is a plan view of a hydraulic cylinder deactivation device according to Embodiment 2 of the present invention. 10 is a cross-sectional view taken along line VI-VI in FIG. 11 is a sectional view taken along line VII-VII in FIG. FIG. 12 is a plan view showing the operation of the hydraulic cylinder resting apparatus according to the second embodiment. 13 is a cross-sectional view taken along the line VIII-VIII in FIG. 14 is a cross-sectional view taken along the line IX-IX in FIG. FIG. 15 is a side sectional view of a hydraulic cylinder deactivation device according to Embodiment 3 of the present invention. FIG. 16 is a side cross-sectional view showing the operation of the hydraulic cylinder resting apparatus according to the third embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  As shown in FIG. 1, the door body opening / closing device 100 is for opening and closing a door body 102 of a sluice 101 provided in the middle of a water channel W. The sluice 101 has casings 101 a and 101 b that are arranged on the upstream side and the downstream side of the water channel W and allow water to pass therethrough. The door body 102 is configured to block the water gate 101 by restricting the passage of water from the upstream casing 101a to the downstream casing 101b, and the closed position lowered between the casings 101a and 101b, and the upstream side In a mode in which water is passed from the casing 101a to the downstream casing 101b to open the sluice 101, the hydraulic cylinder 103 is provided so as to be movable to an open position that is lifted away from between the casings 101a and 101b. . The hydraulic cylinder 103 is driven by a hydraulic device (not shown) so that hydraulic oil is sent into the cylinder 103a, so that the piston 103b moves up and down in the cylinder 103a, and the piston rod 103c is contracted or extended, and is moved to the lower end of the piston rod 103c. The attached door 102 is moved to the open position or the closed position. Above the sluice 101, a bonnet (accommodating portion) that accommodates the piston rod 103c of the hydraulic cylinder 103 that is extended to move the door 102 to the closed position while accommodating the door 102 that has been moved to the open position. 104 is arranged. A hydraulic cylinder 103 is disposed above the bonnet (accommodating portion) 104. The door opening / closing device 100 shown in FIG. 1 is an example, and is not limited to the door opening / closing device 100 as long as the door 102 is moved by the hydraulic cylinder 103 to open / close the sluice 101. .

  In such a door body opening / closing device 100, the piston 103b is moved to a position where the piston rod 103c of the hydraulic cylinder 103 is contracted in order to maintain and inspect the door body opening / closing device 100 and keep water flowing in the water channel W. The sluice 101 may be left open. In this case, the piston 103b may be gradually lowered due to an internal leak of the hydraulic cylinder 103. Therefore, the door opening / closing device 100 is provided with hydraulic cylinder pausing devices 1, 1 ′, 1 ″ according to the following first to third embodiments at the upper end of the hydraulic cylinder 103. Hydraulic cylinder pausing device 1, 1 ′, 1 ″ indicate that the piston 103 b is moved to a position where the piston rod 103 c of the hydraulic cylinder 103 is contracted (rest position) in order to keep the sluice 101 open. While holding in the stopped resting state, the resting state is released to allow the movement of the piston 103b.

[Embodiment 1]
The hydraulic cylinder resting apparatus 1 of Embodiment 1 is shown in FIGS. The hydraulic cylinder resting apparatus 1 includes a hook part 2, a hook receiving part 3, and an operation part 4.

  As shown in FIGS. 3 and 4, the hook portion 2 has a piston rod 103 c that is in the moving direction X of the piston 103 b on the center line C of the hydraulic cylinder 103 from the tip (upper end) of the piston 103 b in the hydraulic cylinder 103. It is a rod having a circular cross section that extends upward along the longitudinal direction. The hook portion 2 is provided with a protrusion 2a projecting outward that intersects (orthogonally) the moving direction X of the piston 103b at the extended end portion (upper end portion). The hook portion 2 in the present embodiment is provided with a protrusion 2a protruding in a part of the outer side that intersects the moving direction X of the piston 103b and in the opposite direction. That is, the hook portion 2 has a protrusion 2a projecting to the left and right and a substantially T-shaped outer shape from the lateral viewpoint shown in FIG. 4, and is 90 degrees around the center line C with respect to FIG. In the rotated side view shown in FIG. 3, the tip portion is formed in the outer shape from which the protrusion 2a does not protrude. The hook portion 2 is provided at the upper end of the cylinder 103a in a form in which the piston 103b of the hydraulic cylinder 103 is moved upwards and the piston rod 103c is contracted (that is, the door body 102 is moved to the open position). It goes out of the cylinder 103a through the formed opening hole 103d.

  As shown in FIGS. 3 and 4, the hook receiving portion 3 is disposed inside a cylindrical housing 5 fixed to the upper end portion of the hydraulic cylinder 103. The housing 5 is provided so as to cover the opening hole 103d in the upper part of the cylinder 103a and to communicate the inside with the opening hole 103d. A rotating body 6 is disposed in the housing 5. The rotating body 6 includes a rotating shaft 6a and a rotating member 6b. The rotation shaft 6 a is provided so as to penetrate inside and outside at the upper end portion of the housing 5. The shaft center is disposed on the center line C of the hydraulic cylinder 103, and the shaft 5 is around the shaft center with respect to the housing 5. It is provided so as to be rotatable. The rotating body 6 is fixed to the lower end of the rotating shaft 6 a disposed in the housing 5. The rotating member 6 b is formed in a cylindrical shape with an open lower end, and the center thereof is disposed on the center line C of the hydraulic cylinder 103. Therefore, the rotating member 6b rotates around the axis (center line C) of the rotating shaft 6a as the rotating shaft 6a rotates. In addition, the rotating member 6b is configured such that the piston 103b of the hydraulic cylinder 103 moves upwards and the piston rod 103c is contracted (that is, the door body 102 is moved to the open position), and the cylinder is passed through the opening hole 103d. It is provided so as to surround the protrusion 2a of the hook portion 2 that protrudes to the outside of 103a (that is, inside the housing 5). The hook receiver 3 is fixed to the lower end of the rotating member 6b in the housing 5, and is provided so as to be able to rotate around the axis (center line C) of the rotating shaft 6a together with the rotating member 6b. Yes.

  As shown in FIGS. 3 to 5, the hook receiving portion 3 has a disk shape formed so as to close the lower end of the rotating member 6 b, and a through hole 3 a is formed in the center thereof. The through-hole 3 a is a hole that is formed in a substantially rectangular shape in plan view and penetrates the inner shape larger than the outer shape of the hook portion 2 along the outer shape of the hook portion 2. That is, in the form shown in FIGS. 3 to 5, the hook portion 2 is provided so as to be movable up and down through the through hole 3 a of the hook receiving portion 3. Therefore, the piston 103b to which the hook portion 2 is fixed is in a form in which the piston rod 103c can move so as to extend and contract. In this way, the position of the hook receiving portion 3 that allows the protrusion 2a of the hook portion 2 to move with the movement of the piston 103b is referred to as a release position.

  The operation unit 4 moves the hook receiving unit 3 by manual operation from the outside of the hydraulic cylinder 103. As shown in FIGS. 2 to 4, the operation unit 4 is fixed to a rotating shaft 6 a penetrating outside the upper end of the housing 5 above the housing 5. That is, the rotary shaft 6a is rotated by operating the operating portion 4, and the hook receiving portion 3 is rotated around the axis (center line C) of the rotary shaft 6a together with the rotary member 6b as the rotary shaft 6a rotates. Moving. The operation unit 4 according to the present embodiment has rod-like handles 4a provided so as to protrude in opposite directions opposite to each other perpendicular to the center line C. The handle 4a is grasped with a hand and the rotary shaft 6a is held. Is to rotate. In addition, although not explicitly shown in the drawing, the operation unit 4 may be any unit having a handle for rotating the rotating shaft 6a.

  The operation of the hydraulic cylinder deactivation device 1 described above will be described with reference to FIGS. First, as shown in FIGS. 2 to 5, when the hook receiving portion 3 is in the release position, the movement of the protrusion 2a of the hook portion 2 accompanying the movement of the piston 103b is allowed, and the piston rod 103c is extended and contracted. Thus, the piston 103b can move. From the release position, the piston 103b is moved to a position where the piston rod 103c of the hydraulic cylinder 103 is contracted, and the operation unit 4 is manually rotated clockwise around the center line C in the plan view of FIG. Operate 1/4 turn (90 degrees) within the operation range of one turn clockwise. Then, as shown in FIG. 7 and FIG. 8, along with the rotation of the rotating shaft 6a, the hook receiving portion 3 together with the rotating member 6b rotates about 1/4 (90 degrees) around the axis (center line C) of the rotating shaft 6a. ) Rotate and move.

  As a result, as shown in FIGS. 7 and 8, the hook receiving portion 3 is arranged such that the edge of the through hole 3a is located immediately below the protrusion 2a. For this reason, the hook receiving part 3 can contact | abut to protrusion 2a of the hook part 2 which moves with the downward movement of piston 103b. The position of the hook receiving part 3 is called a rest position. As a result, movement of the piston 103b downward (in the direction in which the piston rod 103c is extended) is restricted by the hook receiving portion 3 in the rest position, so that the hydraulic cylinder 103 is moved to a position where the piston rod 103c is contracted. In the form in which the piston 103b is moved, the piston 103b is held in a resting state in which the movement of the piston 103b is stopped. Therefore, the door body opening / closing device 100 is maintained in a state in which the door body 102 is raised and the sluice 101 is opened, and maintenance and inspection can be performed or water can be allowed to flow through the water channel W.

  Further, since the hook receiving portion 3 is in the rest position, the operation portion 4 is manually moved within the operation range of one rotation counterclockwise around the center line C in the plan view of FIG. Operate a quarter turn (90 degrees). Then, as shown in FIGS. 3 to 5, along with the rotation of the rotating shaft 6a, the hook receiving portion 3 together with the rotating member 6b rotates about 1/4 (90 degrees) around the axis (center line C) of the rotating shaft 6a. ) Rotating and moving, the hook receiving part 3 returns to the release position. As a result, the hook receiving part 3 in the release position allows the piston 103b to move downward (in the direction in which the piston rod 103c extends), so that the hydraulic cylinder 103 is in a resting state in which the movement of the piston 103b is stopped. Will be canceled. Therefore, the door body opening / closing device 100 can lower the door body 102 and close the sluice 101.

  By the way, the hydraulic cylinder resting apparatus 1 according to the present embodiment includes the detection unit 7 that detects the rest position and the release position of the hook receiving unit 3 in response to the operation of the operation unit 4. As shown in FIGS. 2 to 4, 6, and 7, the detection unit 7 is disposed on the upper outer side of the housing 5 and includes a pair of detection pieces 71 a and 71 b and a pair of detection switches 72 a and 72 b. Yes. The detection pieces 71a and 71b are fixed to a rotating shaft 6a that passes through the outside of the upper end of the housing 5, and as shown in FIGS. 2 and 6, the outer side of the rotating shaft 6a that is orthogonal to the center line C. The center line C is extended in a form shifted by an angle of 90 degrees. The detection switches 72a and 72b are fixed to the upper end portion of the housing 5. As shown in FIGS. 2 and 6, the rotation shaft 6a is rotated by manual operation of the operation unit 4, and the hook receiving unit 3 is in the rest position. And detection levers 72aa and 72ba that are turned on or off by the detection pieces 71a and 71b in a form arranged at the release position. Specifically, as shown in FIG. 2, the detection switch 72a is configured such that the rotation shaft 6a rotates counterclockwise (counterclockwise) and the hook receiving portion 3 is disposed at the release position, and the detection piece 71a is The detection lever 72aa is pushed to turn on. At this time, the detection switch 72b is turned off when the detection piece 71b is separated from the detection lever 72ba. On the other hand, as shown in FIG. 6, the detection switch 72b is configured such that the rotation shaft 6a rotates clockwise (clockwise) and the hook receiving portion 3 is disposed at the rest position, and the detection piece 71b moves the detection lever 72ba. Press to activate. At this time, the detection switch 72a is turned off when the detection piece 71a is separated from the detection lever 72aa. Signals for turning on and off the detection switches 72a and 72b are transmitted to, for example, the hydraulic cylinder deactivation device 1 itself, an operation panel of a hydraulic device (not shown), and the like. 1 pause position and release position can be confirmed.

  Further, the hydraulic cylinder resting apparatus 1 according to the present embodiment includes the lock portion 8 that holds the position of the operation portion 4 that has operated the hook receiving portion 3 to the rest position or the release position. As shown in FIGS. 2, 4, and 6, the lock portion 8 includes a bolt 8 a and screw holes 8 b and 8 c into which the bolt 8 a is screwed. The bolt 8 a is the only one inserted from above with respect to a predetermined position of the operation unit 4. The screw hole 8b is provided in a bearing portion that rotatably supports the rotary shaft 6a in the upper portion of the housing 5, and the bolt 8a is screwed only at the position of the operation portion 4 that has operated the hook receiving portion 3 to the release position. Are arranged to match. The screw hole 8c is provided in the bearing portion, and is arranged so that the bolt 8a is screwed only at the position of the operation portion 4 where the hook receiving portion 3 is operated to the rest position.

  In the hydraulic cylinder deactivation device 1 according to the first embodiment configured as described above, the piston extends from the tip of the piston 103b of the hydraulic cylinder 103 along the moving direction X of the piston 103b and protrudes outward crossing the moving direction X. The hook portion 2 having the projected protrusion 2a and the resting position in contact with the protrusion 2a of the hook portion 2 that moves with the movement of the piston 103b, or the release that allows the movement of the protrusion 2a of the hook portion 2 with the movement of the piston 103b. A hook receiving portion 3 provided so as to be movable to a position and an operation portion 4 for moving the hook receiving portion 3 by manual operation from the outside of the hydraulic cylinder 103 are provided. The piston 103b is stopped by moving the hook receiving portion 3 to the rest position by manual operation of the operation portion 4 in a form in which the piston 103b is moved to a position (pause position) where the piston rod 103c of the hydraulic cylinder 103 is contracted. Hold in state. On the other hand, the suspension state of the piston 103b is released by moving the hook receiving portion 3 to the release position by manual operation of the operation portion 4.

  According to this hydraulic cylinder pausing device 1, the hook receiving portion is manually operated by the operating portion 4 between the resting position that restricts the movement of the protrusion 2 a of the hook portion 2 and the release position that allows the movement of the protrusion 2 a of the hook portion 2. 3 is moved. For this reason, there is no inconvenience such as biting between the resting screw rod and the female threaded portion unlike the conventional manual detachable hydraulic cylinder resting device. In addition, unlike the conventional hydraulic detachable hydraulic cylinder deactivation device, a manual operation is performed without a mechanism that is operated by hydraulic pressure, so that the configuration is simplified and the manufacturing cost can be reduced. As a result, it is possible to easily and reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103 with a simple configuration.

  Moreover, according to the hydraulic cylinder resting device 1, the hook receiving portion 3 is in contact with the protrusion 2a of the hook portion 2 to hold the piston 103b in the resting state. For this reason, if a failure occurs in which the hook receiving portion 3 and the protrusion 2a are caught and the piston 103b cannot be released, the piston 103b is immediately stopped by breaking the hook portion 2 with hydraulic pressure. Can be released, and a configuration for placing the piston 103b in a resting state can be immediately restored by attaching a new hook portion 2 later. In the conventional manual detachable hydraulic cylinder resting device, when the resting screw rod and the female threaded portion are engaged, both are replaced, so that the restoration work is troublesome and the restoration cost increases.

  Further, in the hydraulic cylinder deactivation device 1 according to the first embodiment, the hook portion 2 is provided with a protrusion 2a protruding partly outward intersecting the moving direction X of the piston 103b, and the hook receiving portion 3 of the hook portion 2 is provided. It is fixed to the rotating member 6b that rotates around and is provided so as to be movable to the rest position or the release position as the rotating member 6b rotates, and the operation unit 4 rotates the rotating member 6b within the operation range of one rotation. The hook receiving portion 3 is movably provided at the release position. In particular, in the hydraulic cylinder resting apparatus 1 according to the first embodiment, the hook receiving unit 3 is provided so as to be movable to the resting position or the releasing position within the operation range of ¼ rotation of the operating unit 4.

  According to the hydraulic cylinder resting apparatus 1, the hook receiving part 3 can be moved to the resting position or the releasing position by rotating the operating part 4 to one side or the other within the range of one rotation. For this reason, it is possible to confirm the rest position and the release position based on the rotation direction and rotation position of the operation unit 4. In the conventional manual detachable hydraulic cylinder pause device, the handle is rotated several times to screw the pause screw rod and the female screw portion, and the screw engagement between the pause screw rod and the female screw portion cannot be visually observed. In addition, it is not possible to easily confirm whether the piston is stopped or released in the hydraulic cylinder.

  In addition, the hydraulic cylinder pausing device 1 according to the first embodiment includes the detection unit 7 that detects the pausing position and the release position of the hook receiving unit 3 in response to the operation of the operation unit 4. According to this hydraulic cylinder resting device 1, it is possible to easily confirm whether the piston 103b is in a resting state or released from the hydraulic cylinder 103.

  In addition, the hydraulic cylinder pausing device 1 according to the first embodiment includes the lock unit 8 that holds the position of the operation unit 4 that operates the hook receiving unit 3 to the pausing position or the release position. According to the hydraulic cylinder pausing device 1, it is possible to suppress erroneous operation of the operation unit 4 and to reliably hold the pausing position or the release position of the hook receiving unit 3.

  Further, in the hydraulic cylinder resting apparatus 1 according to the first embodiment, the piston 103b is moved to the position where the piston rod 103c of the hydraulic cylinder 103 is most contracted, and the hook receiving part 3 and the hook part 2 moved to the resting position are moved. A gap H in the moving direction of the piston 103b is provided between the protrusion 2a (see FIG. 7). According to this hydraulic cylinder deactivation device 1, even when there is residual pressure in the cylinder head portion and the piston 103b does not reach the position where the piston rod 103c is most contracted, the hook H does not interfere with the protrusion 2a in the gap H. It is possible to move the receiving part 3 to a rest position. As a result, it is possible to reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103. In the conventional manual detachable hydraulic cylinder resting device, when there is residual pressure in the cylinder head portion and the positions of the resting screw rod and the female screw portion are not aligned, there is a possibility that they cannot be engaged with each other. And since the clearance gap H is provided in the hook part 2 and the hook receiving part 3, exact position (opening) management is not required.

  Further, in the door body opening / closing device 100 of the first embodiment, the door body 102 is fixed to the piston rod 103c of the hydraulic cylinder 103, and the door body 102 is opened and closed in accordance with the extending or contracting operation of the piston rod 103c. The above-described hydraulic cylinder deactivation device 1 is applied in a mode in which the deactivation state of the piston 103b of the hydraulic cylinder 103 is maintained or released.

  With this door body opening / closing device 100, it is possible to easily and reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103 with a simple configuration.

[Embodiment 2]
A hydraulic cylinder resting apparatus 1 'according to Embodiment 2 is shown in FIGS. In the second embodiment described below, the same reference numerals are given to the same components as those in the first embodiment described above.

  The hydraulic cylinder resting device 1 ′ includes a hook portion 2, a hook receiving portion 31, and an operation portion 4.

  As shown in FIG. 10, the hook portion 2 extends from the tip (upper end) of the piston 103b in the hydraulic cylinder 103 to the longitudinal direction of the piston rod 103c, which is the moving direction X of the piston 103b, on the center line C of the hydraulic cylinder 103. It is a rod-shaped thing with a circular cross section extended upwards along. The hook portion 2 is provided with a protrusion 2a projecting outward that intersects (orthogonally) the moving direction X of the piston 103b at the extended end portion (upper end portion). In the hook portion 2 in the present embodiment, the protrusions 2a are provided so as to protrude outward in all directions intersecting the moving direction X of the piston 103b. That is, the hook portion 2 has a substantially T-shaped outer shape at the side view shown in FIG. The hook portion 2 is provided at the upper end of the cylinder 103a in a form in which the piston 103b of the hydraulic cylinder 103 is moved upwards and the piston rod 103c is contracted (that is, the door body 102 is moved to the open position). It goes out of the cylinder 103a through the formed opening hole 103d.

  As shown in FIGS. 10 and 11, the hook receiving portion 31 is disposed inside a cylindrical housing 5 fixed to the upper end portion of the hydraulic cylinder 103. The housing 5 is provided so as to cover the opening hole 103d in the upper part of the cylinder 103a and to communicate the inside with the opening hole 103d. A rotating body 6 is disposed in the housing 5. The rotating body 6 includes a rotating shaft 6a and a rotating member 6b. The rotation shaft 6 a is provided so as to penetrate inside and outside at the upper end portion of the housing 5. The shaft center is disposed on the center line C of the hydraulic cylinder 103, and the shaft 5 is around the shaft center with respect to the housing 5. It is provided so as to be rotatable. The rotating body 6 is fixed to the lower end of the rotating shaft 6 a disposed in the housing 5. The rotating member 6 b is formed in a cylindrical shape with an open lower end, and the center thereof is disposed on the center line C of the hydraulic cylinder 103. Therefore, the rotating member 6b rotates around the axis (center line C) of the rotating shaft 6a as the rotating shaft 6a rotates. In addition, the rotating member 6b is configured such that the piston 103b of the hydraulic cylinder 103 moves upwards and the piston rod 103c is contracted (that is, the door body 102 is moved to the open position), and the cylinder is passed through the opening hole 103d. It is provided so as to surround the protrusion 2a of the hook portion 2 that protrudes to the outside of 103a (that is, inside the housing 5). The hook receiver 31 is provided in the casing 5 on the lower end side of the rotating member 6b, and is slidable by the moving mechanism 9 as the rotating member 6b rotates.

  As shown in FIGS. 10 and 11, the hook receiving portion 31 is formed in a plate shape and is provided on the left and right sides with a pair of hook portions 2 therebetween. Each hook receiving portion 31 is attached to the slide rail 9 a of the moving mechanism 9. The slide rail 9 a is fixed to the upper end side of the cylinder 103 a of the hydraulic cylinder 103 inside the housing 5. The slide rail 9a supports the hook receiving portion 31 so as to be slidable in the left-right direction in FIGS. 10 and 11 so as to approach or separate from the hook portion 2.

  Further, each hook receiving portion 31 is engaged with the guide portion 9 b of the moving mechanism 9. The guide portion 9b is fixed to the lower end of the rotating member 6b, and is formed in a disk shape so as to close the lower end of the rotating member 6b. The guide portion 9b has a through hole 9ba formed at the center thereof. The through-hole 9ba is a hole that is formed in a circular shape and penetrates the hook portion 2 along the outer shape of the protrusion 2a of the hook portion 2 and penetrates the inner shape larger than the outer shape of the protrusion 2a. Further, the guide portion 9b has a guide hole 9bb formed around the through hole 9ba. The guide hole 9bb is a long hole provided corresponding to each hook receiving portion 31, and has one end farthest from the center line C and the other end closest to the center line C. The end is continuous with a smooth arc. A guide pin 31a fixed to the hook receiving portion 31 is inserted through the guide hole 9bb. 10 and 11, the guide pin 31a of each hook receiving portion 31 is disposed at one end of the guide hole 9bb, and each hook receiving portion 31 is the most from the center line C, that is, the hook portion 2. It is a position that is spaced apart from the position directly below the protrusion 2a. In the arrangement of the hook receiving portion 31, the hook portion 2 is provided so as to be movable up and down through between the hook receiving portions 31. Therefore, the piston 103b to which the hook portion 2 is fixed is in a form in which the piston rod 103c can move so as to extend and contract. In this way, the position of the hook receiving portion 31 that allows the protrusion 2a of the hook portion 2 to move with the movement of the piston 103b is referred to as a release position.

  The operation unit 4 is for moving the hook receiving unit 31 by manual operation from the outside of the hydraulic cylinder 103. As shown in FIGS. 9 and 10, the operation unit 4 is fixed to a rotating shaft 6 a penetrating outside the upper end of the housing 5 above the housing 5. That is, by operating the operation unit 4, the rotation shaft 6a rotates, and along with the rotation of the rotation shaft 6a, the guide member 9b rotates together with the rotation member 6b around the axis (center line C) of the rotation shaft 6a. To do. Further, as the guide portion 9b rotates, the hook receiving portion 31 slides along the shape of the guide hole 9bb and the slide rail 9a. The operation unit 4 according to the present embodiment has rod-like handles 4a provided so as to protrude in opposite directions opposite to each other perpendicular to the center line C. The handle 4a is grasped with a hand and the rotary shaft 6a is held. Is to rotate. In addition, although not explicitly shown in the drawing, the operation unit 4 may be any unit having a handle for rotating the rotating shaft 6a.

  The operation of the hydraulic cylinder deactivation device 1 ′ described above will be described with reference to FIGS. 12 to 14. First, as shown in FIGS. 10 and 11, when the hook receiving portion 31 is in the release position, the movement of the protrusion 2a of the hook portion 2 accompanying the movement of the piston 103b is allowed, and the piston rod 103c is extended and contracted. Thus, the piston 103b can move. From the released position, the piston 103b is moved to a position where the piston rod 103c of the hydraulic cylinder 103 is contracted, and the operation unit 4 is manually rotated clockwise around the center line C in the plan view of FIG. Operate 1/4 turn (90 degrees) within the operation range of one turn clockwise. Then, as shown in FIGS. 13 and 14, as the rotary shaft 6a rotates, the guide portion 9b together with the rotary member 6b rotates by a quarter (90 degrees) around the axis (center line C) of the rotary shaft 6a. Rotate. Further, along with the rotation of the guide portion 9b, the hook receiving portion 31 slides in the direction approaching the hook portion 2 along the shape of the guide hole 9bb and the slide rail 9a.

  Accordingly, as shown in FIGS. 13 and 14, each of the hook receiving portions 31 is arranged at a position where the facing edges are directly below the protrusion 2 a. For this reason, the hook receiving part 31 can contact | abut to the protrusion 2a of the hook part 2 which moves with the downward movement of the piston 103b. The position of this hook receiving part 31 is called a rest position. As a result, the movement of the piston 103b downward (in the direction in which the piston rod 103c is extended) is restricted by the hook receiving portion 31 in the rest position. In the form in which the piston 103b is moved, the piston 103b is held in a resting state in which the movement of the piston 103b is stopped. Therefore, the door body opening / closing device 100 is maintained in a state in which the door body 102 is raised and the sluice 101 is opened, and maintenance and inspection can be performed or water can be allowed to flow through the water channel W.

  Further, from the configuration in which the hook receiving portion 31 is at the rest position, the operation portion 4 is manually moved within the operation range of one rotation counterclockwise around the center line C in the plan view of FIG. Operate a quarter turn (90 degrees). Then, as shown in FIG. 10 and FIG. 11, along with the rotation of the rotating shaft 6a, the guide member 9b together with the rotating member 6b rotates by a quarter (90 degrees) around the axis (center line C) of the rotating shaft 6a. Rotate. Further, with the rotation of the guide portion 9b, the hook receiving portion 31 slides in the direction away from the hook portion 2 along the shape of the guide hole 9bb and the slide rail 9a, and the hook receiving portion 31 returns to the release position. As a result, the hook receiving portion 31 in the release position allows the piston 103b to move downward (in the direction in which the piston rod 103c extends), so that the hydraulic cylinder 103 is in a resting state in which the movement of the piston 103b is stopped. Will be canceled. Therefore, the door body opening / closing device 100 can lower the door body 102 and close the sluice 101.

  By the way, the hydraulic cylinder resting apparatus 1 ′ according to the present embodiment includes the detection unit 7 that detects the rest position and the release position of the hook receiving unit 31 in response to the operation of the operation unit 4. As shown in FIGS. 9, 10, 12, and 13, the detection unit 7 is disposed on the upper outer side of the housing 5 and includes a pair of detection pieces 71 a and 71 b and a pair of detection switches 72 a and 72 b. Yes. The detection pieces 71a and 71b are fixed to a rotary shaft 6a that passes through the outside of the upper end of the housing 5, and as shown in FIGS. 9 and 12, the outer side of the rotary shaft 6a that is orthogonal to the center line C. The center line C is extended in a form shifted by an angle of 90 degrees. The detection switches 72a and 72b are fixed to the upper end portion of the housing 5. As shown in FIGS. 9 and 12, the rotating shaft 6a is rotated by manual operation of the operation unit 4, and the hook receiving unit 31 is in the rest position. And detection levers 72aa and 72ba that are turned on or off by the detection pieces 71a and 71b in a form arranged at the release position. Specifically, as shown in FIG. 9, the detection switch 72 a is configured such that the rotation shaft 6 a rotates counterclockwise (counterclockwise) and the hook receiving portion 31 is disposed at the release position, and the detection piece 71 a The detection lever 72aa is pushed to turn on. At this time, the detection switch 72b is turned off when the detection piece 71b is separated from the detection lever 72ba. On the other hand, as shown in FIG. 12, the detection switch 72b is configured such that the rotation shaft 6a rotates clockwise (clockwise) and the hook receiving portion 31 is disposed at the rest position, and the detection piece 71b moves the detection lever 72ba. Press to activate. At this time, the detection switch 72a is turned off when the detection piece 71a is separated from the detection lever 72aa. Signals for turning on and off the detection switches 72a and 72b are transmitted to, for example, the hydraulic cylinder deactivation device 1 ′ itself or a control panel of a hydraulic device (not shown). The rest position and release position of the device 1 'can be easily confirmed.

  Further, the hydraulic cylinder pausing device 1 ′ of the present embodiment includes a lock unit 8 that holds the position of the operation unit 4 that operates the hook receiving unit 31 to the pausing position or the releasing position. As shown in FIGS. 9, 10, and 12, the lock portion 8 includes a bolt 8 a and screw holes 8 b and 8 c into which the bolt 8 a is screwed. The bolt 8 a is the only one inserted from above with respect to a predetermined position of the operation unit 4. The screw hole 8b is provided in a bearing portion that rotatably supports the rotary shaft 6a in the upper portion of the housing 5, and the bolt 8a is screwed only at the position of the operation portion 4 in which the hook receiving portion 31 is operated to the release position. Are arranged to match. Moreover, the screw hole 8c is provided in the said bearing part, and is arrange | positioned so that the volt | bolt 8a may screw together only in the position of the operation part 4 which operated the hook receiving part 31 to the rest position.

  In the hydraulic cylinder deactivation device 1 ′ of the second embodiment configured as described above, it extends along the movement direction X of the piston 103 b from the tip of the piston 103 b of the hydraulic cylinder 103 and outwards intersecting the movement direction X. Permits movement of the protrusion 2a of the hook part 2 accompanying movement of the hook part 2 which has the protrusion 2a which protruded, and the protrusion 2a of the hook part 2 which moves with the movement of piston 103b, or the movement of piston 103b. A hook receiving portion 31 provided to be movable to the release position and an operation portion 4 for moving the hook receiving portion 31 by manual operation from the outside of the hydraulic cylinder 103 are provided. The piston 103b is stopped by moving the hook receiving portion 31 to the rest position by manual operation of the operation portion 4 in a form in which the piston 103b is moved to a position (pause position) where the piston rod 103c of the hydraulic cylinder 103 is contracted. Hold in state. On the other hand, the suspension state of the piston 103b is released by moving the hook receiving portion 31 to the release position by manual operation of the operation portion 4.

  According to the hydraulic cylinder pausing device 1 ′, the hook receiving portion is manually operated by the operating portion 4 between the resting position for restricting the movement of the protrusion 2a of the hook portion 2 and the releasing position for allowing the movement of the protrusion 2a of the hook portion 2. In this configuration, the unit 31 is moved. For this reason, unlike the conventional manual detachable hydraulic cylinder resting device, there is no inconvenience due to the biting between the resting screw rod and the female threaded portion. In addition, unlike the conventional hydraulic detachable hydraulic cylinder deactivation device, a manual operation is performed without a mechanism that is operated by hydraulic pressure, so that the configuration is simplified and the manufacturing cost can be reduced. As a result, it is possible to easily and reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103 with a simple configuration.

  Moreover, the hydraulic cylinder resting device 1 ′ is configured to hold the piston 103 b in a resting state by the hook receiving portion 31 coming into contact with the protrusion 2 a of the hook portion 2. For this reason, if a failure occurs in which the hook receiving portion 31 and the protrusion 2a are engaged and the piston 103b cannot be released, the piston 103b is immediately stopped by breaking the hook portion 2 with hydraulic pressure. Can be released, and a configuration for placing the piston 103b in a resting state can be immediately restored by attaching a new hook portion 2 later. In the conventional manual detachable hydraulic cylinder resting device, when the resting screw rod and the female threaded portion are engaged, both are replaced, so that the restoration work is troublesome and the restoration cost increases.

  Further, in the hydraulic cylinder pausing device 1 ′ of the second embodiment, the rotating member 6b that rotates around the hook portion 2 and the movement that moves the hook receiving portion 31 to the resting position or the releasing position as the rotating member 6b rotates. The mechanism 9 is provided, and the operation unit 4 rotates the rotating member 6b within an operation range of one rotation, and the hook receiving unit 31 can be moved to the rest position or the release position via the moving mechanism 9. In particular, in the hydraulic cylinder resting apparatus 1 ′ according to the second embodiment, the hook receiving portion 31 is provided so as to be movable to the resting position or the releasing position within the operation range of ¼ rotation of the operating portion 4.

  According to this hydraulic cylinder resting device 1 ′, the hook receiving portion 31 can be moved to the resting position or the releasing position by rotating the operating portion 4 to one side or the other within the range of one rotation. For this reason, it is possible to confirm the rest position and the release position based on the rotation direction and rotation position of the operation unit 4. In the conventional manual detachable hydraulic cylinder pause device, the handle is rotated several times to screw the pause screw rod and the female screw portion, and the screw engagement between the pause screw rod and the female screw portion cannot be visually observed. In addition, it is not possible to easily confirm whether the piston is stopped or released in the hydraulic cylinder.

  Further, the hydraulic cylinder pausing device 1 ′ according to the second embodiment includes the detection unit 7 that detects the pausing position and the release position of the hook receiving unit 31 corresponding to the operation of the operation unit 4. According to this hydraulic cylinder deactivation device 1 ′, it is possible to easily confirm whether the piston 103 b is deactivated or released in the hydraulic cylinder 103.

  Further, the hydraulic cylinder pausing device 1 ′ according to the second embodiment includes a lock unit 8 that holds the position of the operation unit 4 that operates the hook receiving unit 31 to the pausing position or the release position. According to this hydraulic cylinder pausing device 1 ′, it is possible to suppress erroneous operation of the operating portion 4 and to reliably hold the pausing position or the releasing position of the hook receiving portion 31.

  Further, in the hydraulic cylinder resting apparatus 1 ′ according to the second embodiment, the hook receiving portion 31 and the hook portion 2 that have moved to the resting position in the form in which the piston 103b has moved to the position where the piston rod 103c of the hydraulic cylinder 103 is most contracted. A gap H in the moving direction of the piston 103b is provided between the projection 2a (see FIG. 13). According to this hydraulic cylinder deactivation device 1 ', even when there is residual pressure in the cylinder head portion and the piston 103b does not reach the position where the piston rod 103c is most contracted, the clearance H does not interfere with the protrusion 2a. The hook receiving part 31 can be moved to the rest position. As a result, it is possible to reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103. In the conventional manual detachable hydraulic cylinder resting device, when there is residual pressure in the cylinder head portion and the positions of the resting screw rod and the female screw portion are not aligned, there is a possibility that they cannot be engaged with each other. And since the clearance gap H is provided in the hook part 2 and the hook receiving part 31, exact position (opening) management is not required.

  Further, in the door body opening / closing device 100 of the second embodiment, the door body 102 is fixed to the piston rod 103c of the hydraulic cylinder 103, and the door body 102 is opened / closed in accordance with the extending or contracting operation of the piston rod 103c. The above-described hydraulic cylinder deactivation device 1 ′ is applied in a mode in which the deactivation state of the piston 103b of the hydraulic cylinder 103 is maintained or released.

  With this door body opening / closing device 100, it is possible to easily and reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103 with a simple configuration.

[Embodiment 3]
15 and 16 show a hydraulic cylinder deactivation device 1 ″ according to the third embodiment. In the third embodiment described below, the same reference numerals are given to the same components as those in the first embodiment described above. To explain.

  The hydraulic cylinder resting device 1 ″ includes a hook part 2, a hook receiving part 32, and an operation part 42.

  As shown in FIG. 15, the hook portion 2 extends from the tip (upper end) of the piston 103b in the hydraulic cylinder 103 to the longitudinal direction of the piston rod 103c, which is the moving direction X of the piston 103b, on the center line C of the hydraulic cylinder 103. It is a rod-shaped thing with a circular cross section extended upwards along. The hook portion 2 is provided with a protrusion 2a projecting outward that intersects (orthogonally) the moving direction X of the piston 103b at the extended end portion (upper end portion). The hook portion 2 in the present embodiment is provided with a protrusion 2a protruding in a part of the outer side that intersects the moving direction X of the piston 103b and in the opposite direction. Further, the hook portion 2 is formed with a constricted portion 2b which is smoothly curved and has a small diameter below the protrusion 2a. That is, the hook portion 2 has a substantially T-shaped outer shape at the side view shown in FIG. The hook portion 2 is provided at the upper end of the cylinder 103a in a form in which the piston 103b of the hydraulic cylinder 103 is moved upwards and the piston rod 103c is contracted (that is, the door body 102 is moved to the open position). It goes out of the cylinder 103a through the formed opening hole 103d.

  As shown in FIG. 15, the hook receiving portion 32 has a roller shape and is disposed inside the cylindrical housing 5 fixed to the upper end portion of the hydraulic cylinder 103. The housing 5 is provided so as to cover the opening hole 103d in the upper part of the cylinder 103a and to communicate the inside with the opening hole 103d. The hook receiving portion 32 is supported by the moving mechanism 10 in the housing 5, and the piston 103 b of the hydraulic cylinder 103 is moved upwards to contract the piston rod 103 c (that is, the door body 102 is moved). In the form of being moved to the open position), the hook portion 2 is paired at the position of the constricted portion 2b of the hook portion 2 that protrudes to the outside of the cylinder 103a (that is, inside the housing 5) through the opening hole 103d. Are provided on the left and right respectively.

  The hook receiving portion 32 is attached to the swinging portion 10 a of the moving mechanism 10. The swinging portion 10a is provided on the left and right sides with a pair of hook portions 2 therebetween. The swinging portion 10a includes a swinging shaft 10aa provided in the upper part of the housing 5 and an arm 10ab whose base end is supported by the swinging shaft 10aa so as to be swingable in the left-right direction in FIG. ing. Each hook receiving portion 32 is attached to the tip of the arm 10ab of each swinging portion 10a. Thereby, each hook receiving part 32 is provided so that it can move to the left-right direction of FIG.

  Each hook receiving portion 32 is guided to move by the guide portion 10 b of the moving mechanism 10. The guide portion 10b is provided on the left and right in pairs with the hook receiving portion 32 disposed between the guide portion 10b and the hook portion 2. The guide portion 10b includes a female screw member 10ba in which a female screw is formed in a cylinder that extends to and is fixed to the outside of the housing 5 while communicating with the inside of the housing 5 at the left and right side portions of the housing 5. A rod-like male screw member 10bb that is screwed into and inserted into the female screw in the female screw member 10ba, and an end of the arm 10ab of the swinging portion 10a provided at the end of the male screw member 10bb in the housing 5. It is comprised with the connection member 10bc connected with. The connecting member 10bc does not transmit the rotation at the time of screwing the male screw member 10bb to the female screw member 10ba to the arm 10ab side, and the joining angle between the male screw member 10bb and the arm 10ab can be freely changed. For example, a ball joint can be applied.

  In the moving mechanism 10, the male screw member 10bb of the guide portion 10b is rotated with respect to the female screw member 10ba. Then, the male screw member 10bb moves in the left-right direction in FIG. 15, and the arm 10ab of the swinging portion 10a swings about the swinging shaft 10aa via the connecting member 10bc along with this movement. For this reason, the hook receiving part 32 moves so as to approach or separate from the constricted part 2b of the hook part 2. In the form shown in FIG. 15, the hook receiving portion 32 moves away from the hook portion 2, and the hook receiving portion 32 does not contact the protrusion 2 a. Thereby, the hook part 2 is provided so that it can move up and down through between the hook receiving parts 32. Therefore, the piston 103b to which the hook portion 2 is fixed is in a form in which the piston rod 103c can move so as to extend and contract. In this way, the position of the hook receiving portion 32 that allows the protrusion 2a of the hook portion 2 to move with the movement of the piston 103b is referred to as a release position.

  The operation unit 42 moves the hook receiving unit 32 by manual operation from the outside of the hydraulic cylinder 103. As shown in FIG. 15, the operation part 42 is fixed to the end part of each male screw member 10bb extending outside the housing 5. That is, by operating the operating portion 42, the male screw member 10bb moves while rotating, and the hook receiving portion 32 moves as the male screw member 10bb moves. The operation unit 42 can be configured as a circular handle centered on the axis of rotation of the male screw member 10bb, for example. In addition, although not explicitly shown in the drawing, the operation unit 42 may be any as long as it has a handle for rotating the male screw member 10bb.

  The operation of the hydraulic cylinder deactivation device 1 ″ described above will be described with reference to FIG. 16. First, as shown in FIG. 15, when the hook receiving portion 32 is in the release position, the hook portion 2 accompanying the movement of the piston 103b. The protrusion 103a is allowed to move, and the piston 103b can move so as to extend and retract the piston rod 103c, and the piston 103b moves from the released position to the position where the piston rod 103c of the hydraulic cylinder 103 contracts. In a form in which each of the male screw members 10bb is manually rotated, each male screw member 10bb is moved so as to approach the hook portion 2. Then, as shown in FIG. Along with the movement, each hook receiving portion 32 moves together with the arm 10ab in a direction approaching the hook portion 2. The rotation operation of each operation portion 42 is performed by each hook receiving portion. 32 may be performed until it abuts against the constricted portion 2b of the hook portion 2.

  Accordingly, as shown in FIG. 16, each hook receiving portion 32 is disposed at a position directly below the protrusion 2a while being in contact with the constricted portion 2b. For this reason, each hook receiving part 32 can contact | abut to protrusion 2a of the hook part 2 which moves with the downward movement of piston 103b. The position of this hook receiving part 32 is called a rest position. As a result, the hook receiving portion 32 in the rest position restricts the downward movement of the piston 103b (the direction in which the piston rod 103c extends), so that the hydraulic cylinder 103 is moved to a position where the piston rod 103c is contracted. In the form in which the piston 103b is moved, the piston 103b is held in a resting state in which the movement of the piston 103b is stopped. Therefore, the door body opening / closing device 100 is maintained in a state in which the door body 102 is raised and the sluice 101 is opened, and maintenance and inspection can be performed or water can be allowed to flow through the water channel W.

  Further, from the form in which the hook receiving portion 32 is at the rest position, the operation portion 42 is manually rotated, and the male screw members 10bb are moved away from the hook portion 2. Then, as shown in FIG. 15, with the movement of each male screw member 10bb, each hook receiving portion 32 moves in a direction away from the hook portion 2 together with the arm 10ab, and returns to the release position. As a result, the hook receiving portion 32 in the release position allows the piston 103b to move downward (in the direction in which the piston rod 103c extends), so that the hydraulic cylinder 103 is in a resting state in which the movement of the piston 103b is stopped. Will be canceled. Therefore, the door body opening / closing device 100 can lower the door body 102 and close the sluice 101.

  By the way, the hydraulic cylinder resting apparatus 1 ″ according to the present embodiment includes the detecting unit 7 that detects the resting position and the releasing position of the hook receiving unit 32 in response to the operation of the operating unit 42. The detecting unit 7 includes: 15 and 16, it is arranged on the lateral outer side of the housing 5 and has a pair of detection pieces 71a and 71b and a pair of detection switches 72a and 72b. It is being fixed to the operation part 42. The detection piece 71a is provided in the cylindrical opening end formed so that the extension end of the internal thread member 10ba extended outside the housing | casing 5 might be covered. The detection piece 71b is the cylindrical inner wall facing the extension end of the female screw member 10ba, and the detection switches 72a and 72b are fixed to the extension end portion of the female screw member 10ba and are operated manually. Causes the male screw member 10bb to move and In the form in which the hook receiving portion 32 is disposed at the rest position or the release position, the lever 32 has detection levers 72aa and 72ba that are turned on or off by the detection pieces 71a and 71b that move together with the male screw member 10bb. 15, the detection switch 72a is turned on when the detection piece 71a pushes the detection lever 72aa in a form in which the hook receiving portion 32 is disposed at the release position. The piece 71b is turned off by separating from the detection lever 72ba, while the detection switch 72b has a configuration in which the hook receiving portion 32 is disposed at the rest position as shown in Fig. 16, and the detection piece 71b moves the detection lever 72ba. At this time, the detection switch 72a is turned off when the detection piece 71a is separated from the detection lever 72aa. Signals for turning on and off 2a and 72b are transmitted to, for example, the hydraulic cylinder deactivation device 1 "itself or an operation panel of a hydraulic device (not shown). Here, the hydraulic cylinder deactivation device 1" is displayed by a lamp or a display unit. The rest position and release position can be confirmed.

  In the hydraulic cylinder resting apparatus 1 ″ of the third embodiment configured as described above, the hydraulic cylinder 103 extends from the tip of the piston 103b along the moving direction X of the piston 103b and outwards intersecting the moving direction X. Permits movement of the protrusion 2a of the hook part 2 accompanying movement of the hook part 2 which has the protrusion 2a which protruded, and the protrusion 2a of the hook part 2 which moves with the movement of piston 103b, or the movement of piston 103b. A hook receiving portion 32 movably provided at the release position is provided, and an operation portion 42 for moving the hook receiving portion 32 by a manual operation from the outside of the hydraulic cylinder 103. The piston rod 103c of the hydraulic cylinder 103 is provided. The hook 103 is moved by the manual operation of the operation unit 42 in the form in which the piston 103b is moved to the position (rest position) where the operation is contracted. Holding the piston 103b in a dormant state by moving the 2 to the rest position. On the other hand, to release the dormant state of the piston 103b by moving the hook receiving portion 32 in the release position by a manual operation of the operation unit 42.

  According to the hydraulic cylinder pausing device 1 ″, the hook receiving is performed by manual operation of the operating portion 42 between a pausing position that restricts the movement of the protrusion 2a of the hook portion 2 and a release position that permits the movement of the protrusion 2a of the hook portion 2. Therefore, there is no inconvenience due to the engagement between the resting screw rod and the female threaded portion as in the conventional manual detachable hydraulic cylinder resting device. Unlike the hydraulic cylinder deactivation device, since it is a manual operation without a mechanism that operates by hydraulic pressure, the configuration is simplified and the manufacturing cost can be reduced. It is possible to easily and surely hold and release the rest state of the piston 103b.

  Moreover, according to the hydraulic cylinder resting device 1 ″, the hook receiving portion 32 is in contact with the protrusion 2a of the hook portion 2 so as to hold the piston 103b in the resting state. When a failure occurs in which the piston 32 b cannot be released due to the engagement between the portion 32 and the protrusion 2 a, the piston 103 b can be released immediately after the hook portion 2 is broken by the hydraulic pressure. It is possible to immediately recover the configuration in which the piston 103b is in a resting state by attaching the hook portion 2. In the conventional manual detachable hydraulic cylinder resting device, the resting screw rod and the female threaded portion are engaged. In this case, both of them are exchanged, so that the restoration work takes time and the restoration cost increases.

  Further, the hydraulic cylinder deactivation device 1 ″ of the third embodiment includes the detection unit 7 that detects the deactivation position and the release position of the hook receiving unit 32 corresponding to the operation of the operation unit 42. According to the apparatus 1 ″, it is possible to confirm whether the piston 103b in the hydraulic cylinder 103 is held or released.

  Further, in the hydraulic cylinder resting apparatus 1 ″ of the third embodiment, the hook receiving part 32 and the hook part 2 moved to the resting position in the form in which the piston 103b is moved to the position where the piston rod 103c of the hydraulic cylinder 103 is most contracted. A clearance H in the moving direction of the piston 103b is provided between the protrusion 2a (see FIG. 16). According to the hydraulic cylinder deactivation device 1 ", there is residual pressure in the cylinder head portion, and the piston 103b Even when the rod 103c does not reach the position at which it is most contracted, the hook receiving portion 32 can be moved to the rest position without interfering with the projection 2a by the gap H. As a result, it is possible to reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103. In the conventional manual detachable hydraulic cylinder resting device, when there is residual pressure in the cylinder head portion and the positions of the resting screw rod and the female screw portion are not aligned, there is a possibility that they cannot be engaged with each other. And since the clearance gap H is provided in the hook part 2 and the hook receiving part 32, exact position (opening) management is not required.

  Further, in the door body opening / closing device 100 of the third embodiment, the door body 102 is fixed to the piston rod 103c of the hydraulic cylinder 103, and the door body 102 is opened and closed in accordance with the extending or contracting operation of the piston rod 103c. The above-described hydraulic cylinder deactivation device 1 ″ is applied in a mode in which the deactivation state of the piston 103b of the hydraulic cylinder 103 is maintained or released.

  With this door body opening / closing device 100, it is possible to easily and reliably hold and release the rest state of the piston 103b in the hydraulic cylinder 103 with a simple configuration.

  As described above, the hydraulic cylinder pausing device and the door opening / closing device according to the present invention are suitable for easily and reliably holding and releasing the piston pausing state in the hydraulic cylinder with a simple configuration.

1, 1 ', 1 "Hydraulic cylinder deactivation device 2 Hook part 2a Protrusion 2b Constricted part 3 Hook receiving part 3a Through hole 31 Hook receiving part 31a Guide pin 32 Hook receiving part 4 Operation part 4a Handle 42 Operation part 5 Housing 6 Rotation Body 6a Rotating shaft 6b Rotating member 7 Detection part 71a, 71b Detection piece 72a, 72b Detection switch 72aa, 72ba Detection lever 8 Lock part 8a Bolt 8b, 8c Screw hole 9 Moving mechanism 9a Slide rail 9b Guide part 9ba Through hole 9bb Guide hole DESCRIPTION OF SYMBOLS 10 Moving mechanism 10a Oscillating part 10aa Oscillating shaft 10ab Arm 10b Guide part 10ba Female screw member 10bb Male screw member 10bc Connecting member 100 Door body opening / closing device 101 Water gate 101a, 101b Casing 102 Door body 103 Hydraulic cylinder 103a Cylinder 103b 103c piston rod 103d opening hole 104 bonnet (accommodating portion)
W Waterway C Center line H Clearance X Movement direction

Claims (6)

A hook portion extending from the piston tip of the hydraulic cylinder along the moving direction of the piston and having a protrusion protruding outward that intersects the moving direction;
A hook receiving portion movably provided at a resting position where it abuts against the protrusion of the hook portion that moves with the movement of the piston, or a release position that allows movement of the protrusion of the hook portion with the movement of the piston; ,
An operation part for moving the hook receiving part by manual operation from the outside of the hydraulic cylinder;
And holding the piston in a resting state by moving the hook receiving part to a resting position by manual operation of the operating part. On the other hand, a hydraulic cylinder pausing device that releases the pausing state of the piston by moving the hook receiving portion to a release position by manual operation of the operation portion.   The hook portion is provided to protrude outward from a portion of the piston that intersects the moving direction of the piston, and the hook receiving portion is fixed to a rotating member that rotates around the hook portion to rotate the rotating member. Along with this, it is provided movably to the rest position or the release position, and the operation part rotates the rotating member within an operation range of one rotation, and the hook receiving part is provided to be movable to the rest position or the release position. The hydraulic cylinder deactivation device according to claim 1, wherein the hydraulic cylinder deactivation device is provided.   A rotating member that rotates around the hook portion; and a moving mechanism that moves the hook receiving portion to the rest position or the release position as the rotating member rotates. 2. The hydraulic cylinder pausing device according to claim 1, wherein the hook receiving portion is provided so as to be able to move to the pausing position or the releasing position via the moving mechanism by rotating the rotating member.   The hydraulic cylinder according to any one of claims 1 to 3, further comprising a detection unit that detects the rest position and the release position of the hook receiving unit in response to an operation of the operation unit. Pause device.   In the form in which the piston is moved to the position where the piston rod of the hydraulic cylinder is most contracted, a clearance in the moving direction of the piston is provided between the hook receiving portion moved to the rest position and the protrusion of the hook portion. The hydraulic cylinder deactivation device according to any one of claims 1 to 4, wherein In a door body opening and closing device in which a door body is fixed to a piston rod of a hydraulic cylinder, and the door body is opened and closed in accordance with an extending operation or a contracting operation of the piston rod.
A door body opening and closing device to which the hydraulic cylinder pause device according to any one of claims 1 to 5 is applied in a mode of maintaining or releasing a pause state of a piston of the hydraulic cylinder.

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