JPH0752084Y2 - Lifting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a lifting mechanism that enables lifting and lowering of a heavy object and positioning and holding at a rising end.

For example, in a large dust collector, it is often necessary to remove the heavy top lid to replace the filter and perform separate cleaning. Since it is necessary to work in this state, there is a problem that this type of work requires two workers.

(Problems to be solved by the invention) The present invention has been made in view of such a problem, and an object thereof is to easily lift and lower a heavy object and to lift a heavy object at that position. It is to provide a new lifting mechanism that can be held.

(Means for Solving the Problem) That is, the present invention provides, as an elevating mechanism for achieving the above problem, two shafts below the pivotal support end of a swingable support arm that supports a heavy object at its tip. A first shaft is attached to the lower end of the supporting arm on the side of the pivotal support end to press the arm upward, and an operating lever is attached to the second shaft connected to the first shaft via a gear. By mounting and operating this operation lever, the arm is rotated between a lower rotation position and the other rotation position slightly above the vertical line.

(Example) Then, the Example illustrated below is described.

FIGS. 1 and 2 show an embodiment of the present invention configured as an elevating mechanism of a lid. One end of a supporting arm 3 is swingably held by a pin 4 on a supporting bracket 2 fixed to a machine frame 1. The upper cover 16 of the dust collector 15 is pivotally supported and is suspended and supported by a free end of the support arm 3 via a bracket 17. Reference numeral 7 denotes a first shaft supported by another support bracket 6 on the machine frame 1 immediately below the base end side of the arm 3.
A short arm 9 having a roller 8 that abuts on the lower edge of the support arm 3 is fixed to the tip of the arm.

11 is a second shaft which is supported below the first shaft 7 in parallel,
A gear 12 meshing with a gear 10 on the first shaft 7 is fixed to one end of the shaft 11, and an operating lever 13 is integrally attached to the gear 12 by a pin. By rotating 13 from the horizontal position (lower position) shown in FIG. 1 to the vertical position (upper position) shown in FIG. 2, the arm 9 on the first shaft 7 is moved from the substantially horizontal position. It is configured to rotate to a position slightly beyond the perpendicular line Y and to the opposite side. Reference numeral 14 in the figure indicates a stopper.

In the embodiment constructed in this manner, the tip of the lever 13 which is currently in a horizontal position is gripped and the stopper 14 is held.
When it is rotated counterclockwise in the figure until it contacts the lever,
The gear 12 rotated together with 13 moves the arm 9 which is integral with the first shaft 7 via the gear 10 meshing with the gear 12 from the lateral position shown in FIG. 1 to the position perpendicular to the vertical line Y shown in FIG. Up to the clockwise direction in the figure, and the base 8 of the support arm 3 is pushed up from below by the roller 8 at the tip thereof, and the lid 16 suspended and supported at the tip of the arm 3 is lifted.

Therefore, the heavy lid 16 is pulled by a slight force which is inversely proportional to the ratio of the lengths of the operation lever 13 and the arm 9 and the ratio of the total length of the support arm 3 to the distance from the pivot end to the contact point of the roller 8. As a matter of course, the operating lever 13 can be raised from the horizontal position to the vertical position by gradually shortening the distance between the contact point of the roller 8 and the pivot point of the support lever 3 in the course of the rotation of the arm 9. The required force can be reduced according to the force that can be applied when rotating. The arm 9 that has reached the end of the rotation line at a point beyond the perpendicular 7 by this rotation is added with the lid via the support lever 16.
The weight of 16 can be supported, and this can be positioned and held at the pulling-up rising end, and the subsequent replacement of the filter, disassembly and cleaning, etc. can be performed without any hindrance.

In the embodiment shown in FIG. 3, the first and second gears 20 and 22 are toothless gears having teeth 20a22a only in the rotation range of the arm 9. According to this embodiment, Since the rotation of the arms 9 can be restricted at both ends of the row, when the lever 13 is rotated counterclockwise as shown in FIG. While the rotation of the arm 9 can be stopped with and the support arm 3 can be held in its upward posture, when the lever 13 is rotated clockwise, even if it is released in the middle, As shown in FIG. 3 (a), the further rotation of the arm 9 can be suppressed by the abutment of the other end of the dentition, and the downward rotation amount of the support arm 3 is restricted so that the support arm 3 is supported at the tip. It is possible to prevent an accident in which the object collides hard with the other end at the descending end.

(Effect) As described above, according to the present invention, an arm that comes into contact with the lower side of the pivotal support end of the support lever is provided below the pivotal support end of the swingable support lever that supports a heavy object at the tip. Since the arm is rotated by the operating lever between the lower rotation end and the other rotation end slightly above the vertical line, it is possible to lift and lower heavy objects with a slight force, and also to support. By changing the distance from the pivot point of the lever to the contact point of the arm tip with the rotation angle of the arm, it is possible to more easily lift and lower the heavy object according to the magnitude of the force applied to the operation lever.

Moreover, since the end of the arm's rotation is slightly beyond the vertical line, it is possible to securely hold the heavy object at the hoisting position via the support lever, and the lifting of the heavy object and subsequent work can be performed by one person. Can be easily performed by the operator.

[Brief description of drawings]

1 and 2 are side views of the apparatus showing one embodiment of the present invention shown in the ascending / descending state. FIGS. 3 (a) and 3 (b) show other embodiments of the present invention shown in the respective operating states. It is a side view of a main part. 3 ... Support lever, 9 ... Arm 10, 12 ... Gear, 13 ... Operating lever 16 ... Lid, 20, 22 ... Partial gear

Claims (2)

[Scope of utility model registration request] Claims: 1. Two shafts are provided below the pivotal support side of a swingable support arm which supports a heavy object at its tip, and a first shaft is provided with a lower side of the support arm on the pivotal support side. An arm that abuts and pushes upward is attached, and an operation lever is attached to a second shaft that is connected to the first shaft through a gear, and the arm is operated by operating the operation lever to a lower rotation position and a perpendicular line. An elevating mechanism characterized in that it is adapted to be rotated between the other rotational position which is slightly above. 2. A toothless gear that meshes with each other is attached to the first and second shaft ends, and the arm is moved between the lower rotational position and the other rotational position slightly beyond the vertical line by the toothless gear. The elevating mechanism according to claim 1, wherein rotation is restricted.