JP5268950B2 - Bar breaker with bar weight offset system - Google Patents

Abstract

A motorized bar barrier device, including a shaft (14) supporting the bar, a motor unit (12) for the rotation of the shaft and a unit (13) for offsetting the moment produced on the shaft by the weight of the bar. The offsetting unit (13) comprises a torsion spring (24) wrapped coaxially at the shaft and which has a first end (27) that is pushed by the rotation of the shaft to wind the spring when the shaft (14) is turned in a first direction starting from a neutral position and a second end (28) that is pushed by the rotation of the shaft to wind the spring when the shaft (14) is turned in a second opposite direction starting from the neutral position. This way, the system can provide offsetting of the moment produced by the weight of the bar in both the directions of rotation starting from the neutral position.

Description

  The present invention relates to an electric bar shut-off device that makes it possible to adapt the bar to a right or left opening without having to adjust the balancing system. In the case of bar blocking devices, there is a known need to at least partially offset the moment caused by the weight of the bar. This moment varies greatly during the movement of the bar from the vertical position to the horizontal position or from the horizontal position to the vertical position.

  Various mechanisms have been proposed to perform this cancellation. For example, a spiral balancing wheel has been proposed that is connected between the frame of the device and a suitable arm protruding from the bar rotating shaft. During rotation of the bar toward the horizontal position, the spring extension tends to offset the moment of bar weight. When it is necessary to open right instead of left, either the spring must be moved to the target, or the entire device must be moved 180 ° about its vertical axis. Yes, so the exit shaft always completes the same rotation. The first solution requires manual intervention that is not always easy, especially due to the strong spring tension. The second solution is that when two contrasting pairs of breakers are used on both sides of the same passage, the appearance of the right breaker (turned in the opposite direction) is asymmetric with respect to the left breaker cause. In addition, you may find that the manual release mechanism of the bar is directed towards the wall that restricts access, resulting in operational difficulty or impossibility in the event of a power drive failure or power failure. there were.

  In order to obtain a better balance without taking up space, it was also proposed to use a torsion spring placed on the axis of rotation of the bar. However, with this solution, the spring on the shaft has to be removed and reversed (it must be removed anyway), which makes the change in the direction of action of the spring rather complicated. For this reason, in the case of a torsion spring, priority is given to rotating the whole blocking device by 180 ° with respect to the above-mentioned asymmetry problem.

  It is a general object of the present invention to provide a blocking device with a balance system that can counteract regardless of the right or left opening bar to solve the above-mentioned drawbacks.

  In light of this object, the present invention includes a shaft for supporting a bar, a motor unit for rotating the shaft, and a unit for canceling the moment generated in the shaft by the weight of the bar, A torsion spring wound coaxially around the shaft, the torsion spring having a first end pushed by rotation of the shaft so that the spring is wound when the shaft is rotated in a first direction starting from a neutral position; Caused by the weight of the bar in both directions of rotation starting from the neutral position, having a second end pushed by the rotation of the shaft so as to wind the spring when it is rotated in the second opposite direction starting from the neutral position An electric bar breaker device designed to at least partially offset It was. In order to make the innovative features of the present invention and the advantages of the present invention over the state of the art more clear, with the aid of the attached drawings, a description of possible exemplary embodiments applying such principles will be given. This will be described below.

1 is a partial schematic perspective view of a blocking device according to the present invention. FIG. FIG. 2 is a schematic plan view of the device of FIG. 1. FIG. 2 is a partial schematic perspective view of a rear portion of the device of FIG. 1. FIG. 2 is a partial schematic perspective view of a release element of the device of FIG. 1. FIG. 2 is a rear perspective view of the blocking device of FIG. 1 with wall fasteners.

  Referring to the drawings, FIG. 1 shows a bar blocking device generally indicated at 10 (with the closure cover broken and removed).

  The apparatus 10 includes a body 11 that houses a motor unit 12 and a balance unit 13 connected to a rotating shaft 14, and a plate 15 for attaching a bar 16 is fixed to the rotating shaft 14.

  As can be seen better in FIG. 2 with some covers partially removed, the rotating shaft 14 (supported by a pair of bearings 17 and 18) supports a gear 19 to which the pinion 20 of the gear motor 21 is supported. Are engaged. Advantageously, as will become apparent later, the gear 19 engages the shaft in a releasable manner by a release system 22 driven by an operating lever 23 (protected if necessary by a key cover not shown). Combined.

  The shaft 14 projects rearwardly across the torsion spring 24 of the counterbalance unit 13 and integrally supports the arm 25. The arm 25 is positioned parallel to the shaft 14 and radially at a distance from the shaft 14. The thrust pin 26 is supported.

  The spring has a first end 27 which is pushed to wind the spring when the shaft is rotated in a first direction starting from the neutral position (corresponding to a bar in the vertical position) and a second opposite where the shaft starts from the neutral position. Having a second end 28 that is pushed to wind the spring when rotated in the direction.

  Specifically, as can be clearly seen again in FIG. 2, in the bar vertical position, the torsion spring 24 has two ends 27 extending in the radial direction so as to strike the ends of the pin 26 in a targeted manner in the direction of spring tension. And 28. The torsion spring is advantageously preloaded to assist in the stable support of the vertical position of the bar with the desired force.

  In order to wind the spring starting from the neutral position, there is a one-way stop means on the end of the spring to stop the movement of each end of the spring in the direction opposite to the thrust direction of the pin. These means are advantageously made at the bottom or end of the tear 29, 30 formed in the cover shell of the spring and through which the end of the spring passes.

  In order to complete its closing movement, the bar must advantageously be rotated by 90 ° (counterclockwise in the case shown) between the two mechanical stops. If one of the two mechanical stops is provided with another fixed stop, the lever will start from the same vertical position, but will rotate in the opposite direction when causing reverse rotation of the rod. It must be movable.

  As better shown in FIG. 3, during movement, the rear lever 25 rotates by 90 degrees from a vertical position (shown by a solid line) to a horizontal position (shown by a broken line). The mechanical stop means is expected to limit the rotational movement of the shaft between the vertical and horizontal positions of the bar. Such means can be adjusted to selectively have a horizontal position in either the clockwise or counterclockwise direction relative to the vertical position of the bar.

  Movement between the two positions is advantageously limited by a vertical position stop 31 and a horizontal position stop 32, respectively. Prevent further counterclockwise movement (as shown in FIG. 2) or clockwise movement (by turning the plate over to the right of the lever, as shown by the dashed line in FIG. 2), thereby disengaging the movable stop Can be mounted to achieve. In this latter case, the horizontal position of the lever is turned over to the left, and the horizontal stop becomes the stop 33 (reflected with respect to the stop 32).

  When the device is mounted as shown, the pin 26 moves the spring end 27 when the lever passes from the vertical position to the horizontal position (with counterclockwise movement in FIG. 1) and the end 28 is the stop seat. The end 28 remains restrained by 30. When the circuit breaker is required to operate in the opposite direction, the vertical stop 31 is simply switched, so when the gear motor is properly operated, the bar moves clockwise from the vertical position to the horizontal position. The pin 26 moves the end 28 of the spring and the end 27 remains restrained by the stop seat 29. In any case, the torsion spring (appropriately sized according to the weight of the bar) produces the required balancing effect in a completely symmetrical manner.

  The position of the plate 15 and the bar on this plate so that if it is misaligned with respect to the axis of rotation (as shown in the figure), a movement is obtained that is perfectly symmetric in both the right and left openings. There is also the possibility of reversing.

  FIG. 4 shows in more detail the bar release system to be activated when the bar has to be manually operated while maintaining the spring balancing action. As explained above, the purpose of the release is to free the bar from a gear motor that cannot be rotated in reverse.

  For this purpose, the release system includes a releasable means of engagement between the gear 19 and the shaft 14. Advantageously, the engagement means comprises an elongate element 35 which is orthogonal to the shaft 14 with a slot or groove 36 provided in the shaft so that it can slide axially against the action of the thrust spring 37. And cross. The spring 37 pushes the element 35 into the radial seat 38 of the bush 39 which is integral with the gear 19 and rotates freely on the shaft 14.

  An actuation pin 40 (shown in phantom in FIG. 2) can slide axially within the shaft 14 to push the element 35 by actuating the lever 23 and disengage the element 35 from the bushing.

  Advantageously, the bushing 39 has radial seats separated by an angle (for example every 30 °) so that the rod can be re-restrained in an intermediate position.

  At this point it is clear how to achieve this object, providing a device that allows the bar to be balanced in both directions without having to intervene in the balancing device. Rod balancing is done by rotating the attachment of a torsion spring that is wound during the movement of the bar: to balance the rod in the opposite application, the rod is 180 ° (if required by the support). Simply rotate and rotate the movable stop, in this way, the outlet shaft moves the other appendages by rotating in the opposite direction (the first appendage still remains) and the balance of the bar Enable.

  A further advantage of the described device is that it has a release on the same side when there are two contrasting circuit breakers at the inlet.

  It should be noted that unlike ordinary circuit breakers, rod balancing is advantageously performed by a moment that is directly proportional to the torsion of the spring. In this way, the spring can be selected as appropriate according to the weight of the bar, so the moment generated by the spring is very different from the opposite moment generated by the weight of the bar, The motor can operate with minimal load and can therefore rotate at almost the highest idling speed.

  The rod advantageously has the same static moment with respect to the center of rotation at the maximum length of the rod, and to offset the lost static moment when the rod is shortened (within certain limits). Appropriate weight can be added and dimensioned to ensure best circuit breaker operation. This method eliminates the need to have several springs for different rod lengths.

  The device according to the invention has a novel feature that, thanks to the innovative structure of the cancellation system, can be fixed directly to the wall without the traditional base of the prior art, so that the device is oriented vertically In a compact shape and limited depth, with reversibility of the bar opening and closing direction without prior release and rotation of the actuator body. FIG. 5 shows the device of FIG. 1 with a support 41 which can advantageously be fixed to the body 11 and has a fixing means 42 (for example a hole with a screw anchor) for wall mounting on the back.

  Naturally, the above description of embodiments applying the innovative principles of the present invention is illustrative of such innovative principles and should not be construed as limiting the scope of the patent claims claimed herein. . For example, the position of the bar relative to the axis of rotation, and the bar mounting system can be varied according to specific requirements including aesthetic properties. If necessary, the arm interfering with the mechanical stops at the two extreme bar rotation positions can be separated from the support arm of the thrust pin 26 if necessary. There may be no bar release means, or it may be different from that described advantageously.

Claims (16)

An electric bar blocking device,
A shaft (14) for supporting the bar, a motor unit (12) for rotating the shaft, and a unit (13) for canceling the moment generated in the shaft by the weight of the bar, the canceling unit (13) includes: The shaft has a torsion spring (13) wound coaxially and the torsion spring is pushed by the rotation of the shaft to wind the spring when the shaft (14) is rotated in a first direction starting from the neutral position. Having a first end (27) and a second end (28) that is pushed by rotation of the shaft to wind a spring when the shaft (14) is rotated in a second opposite direction starting from a neutral position; At least partially offset the moment caused by the weight of the bar in both directions of rotation starting from the neutral position It has become the jar,
Bar electrical disconnect device.   The shaft (14) supports the thrust pin (26) by an alternative thrust at the two ends (27, 28) of the spring, the thrust pin being radial to push the pin (26) from opposite directions. Each end of the spring in a direction opposite to the winding direction during thrust movement of the pin (26) at the other end, parallel to the shaft and at a radial distance so as to be between the two ends of the spring Device according to claim 1, wherein one-way stop means (30) are provided for preventing movement of (27, 28).   A device according to claim 1, wherein the torsion spring (24) is selected to have a moment generated by the spring in a pattern substantially the same and directly proportional to the moment generated by the weight of the bar.   3. Device according to claim 2, wherein the one-way stop means consist of the ends of two tears (29, 30) formed in the cover shell of the spring through which the spring ends (27, 28) pass.   2. Device according to claim 1, wherein the mechanical stop means (31, 32, 33) are adapted to limit the rotational movement of the shaft between the vertical position of the bar and the horizontal position of the bar.   6. A device according to claim 5, wherein the mechanical stop means is adjustable to alternatively have a position with the horizontal bar in a clockwise or counterclockwise direction relative to a vertical position.   The stop means includes a first vertical position stop (31) and at least one second horizontal position stop (32) with which a radially projecting arm from the shaft (14) interferes. The device described.   The vertical position stop (31) is a reversible plate which can be mounted to prevent further rotation of the arm (25) protruding from the shaft (14), alternatively clockwise or counterclockwise. 8. A device according to claim 7, made in shape.   The shaft (14) is parallel to the shaft by alternative pushing by the two ends (27, 28) of the spring and protrudes radially so as to push the pin (26) from the opposite direction. A thrust pin (26) at a radial distance is supported so as to be between the two ends, and the one-way stop means (29, 30) during the thrust movement of the pin (26) acting on the other end of the spring It is provided to prevent the movement of each end (27, 28) in the direction opposite to the winding direction, and the arm (25) is provided on the shaft (14) and acts as a support for the thrust pin (26). The device of claim 7.   The device according to claim 1, wherein the motor unit is dynamically connected to the shaft (14) in a releasable manner by a release system (22, 23).   The release system is a releasable engagement between the gear (19), which can rotate on the shaft (14) and is connected to the pinion (20) of the gear motor (21) of the motor unit (12), and the shaft and the gear. 11. A device according to claim 10, comprising a combination of mating means (35, 39) and a lever (23) for manually manipulating the releasable means between engaged and disengaged positions.   12. Device according to claim 11, wherein the lever (23) is positioned on a plate (15) which supports the bar with a shaft (14).   The releasable means is between an engaged position within the radial seat (38) of the bush (39) integral with the gear (19) and a disengaged position from the seat (38). An elongate element (35) transversely intersecting the shaft (14) at the location of an elongate slot (36) that is axially slidable on the shaft, the lever is elongate element against movement of the spring (37) 12. A device according to claim 11, wherein the device is dynamically coupled to the elongate element (35) to cause movement of the device from an engaged position to a disengaged position.   14. Device according to claim 13, wherein the lever (23) is dynamically connected to the elongate element (35) by an operating pin (40) that slides axially within the shaft (14).   14. A device according to claim 13, wherein the bushing (39) comprises a plurality of angularly spaced apart radial seats (38).   2. Device according to claim 1, comprising wall fixing support means (41, 42).

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