JP5905338B2 - lift device - Google Patents

Description

  The disclosed embodiment relates to a lifting device.

  2. Description of the Related Art Conventionally, luggage lifting and lowering devices used for cargo handling work and the like are known. Such a lifting device includes, for example, a wire winding system that lifts and lowers a carriage that is slidable along a pair of guide rails arranged in parallel along the vertical direction by winding and feeding the wire. is there.

  In the wire winding method, if the wire is loosened or cut, the carriage held by the wire tension may fall. Therefore, a lifting device provided with a fall prevention mechanism in such a case has also been proposed (see, for example, Patent Document 1).

  Such a fall prevention mechanism is, for example, arranged in a V shape between the pair of guide rails described above, and a pair of links connected to the carriage so as to close the V shape when the wire is loosened or cut. Consists of members.

  Here, an engagement member that is pivotally supported by the carriage and rotates in a direction to contact the guide rail in conjunction with the closing movement of the link member is connected to the distal end portion of each link member. The carriage is prevented from dropping by abutting against the guide rail.

JP 2007-131388 A

  However, the conventional lifting device has room for further improvement in order to increase safety during work. For example, since the above-described fall prevention mechanism opens and closes the link member arranged in a V shape, the movable region of the movable member including the link member tends to be large. That is, since the movable region is easily exposed, it is difficult to ensure sufficient safety during work.

  One aspect of the embodiment has been made in view of the above, and an object thereof is to provide an elevating device that can sufficiently ensure safety during work.

The lifting device according to one aspect of the embodiment includes a pair of guide rails, a carriage, a horizontal bar, a pulley, a traction member, a biasing member, and a contact member. The pair of guide rails are arranged in parallel along the vertical direction. The carriage is slidable along the pair of guide rails. The horizontal bar is formed in a straight line, and is horizontally attached to the carriage with play in the vertical direction. The pulley is provided with a rotating shaft passing through the central portion of the horizontal bar. The pulling member pulls the horizontal bar vertically upward via the pulley . The urging member is connected to the horizontal bar and urges the horizontal bar vertically downward. The abutting member is pivotally supported by the carriage, and abuts on the guide rail by rotating in conjunction with the downward movement of the horizontal bar along the play. Further, the horizontal bar and the pulley are arranged along the skeleton so that the movable region is hidden behind the skeleton of the carriage.

  According to one aspect of the embodiment, sufficient safety during work can be ensured.

FIG. 1 is a front perspective view showing the configuration of the lifting device according to the embodiment. FIG. 2 is a rear perspective view illustrating the configuration of the lifting device according to the embodiment. FIG. 3 is a rear perspective view showing the configuration of the carriage base. FIG. 4A is a rear perspective view showing the configuration of the cover portion. FIG. 4B is a front perspective view (No. 1) illustrating the configuration of the cover portion. FIG. 4C is a front perspective view (No. 2) illustrating the configuration of the cover portion. FIG. 5A is a rear perspective view showing an engagement configuration between the guide rail and the carriage base. FIG. 5B is a rear perspective view showing the configuration of the contact member and the vicinity thereof. FIG. 6 is a schematic diagram illustrating a modified example of the connecting method of the contact member to the horizontal bar. FIG. 7A is a schematic diagram (No. 1) showing a modification of the engagement configuration between the cover portion and the horizontal bar. FIG. 7B is a schematic diagram (No. 2) illustrating a modification of the engagement configuration between the cover portion and the horizontal bar.

  Hereinafter, embodiments of a lifting device disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by embodiment shown below.

  In addition, for easy understanding, each figure used in the following description may show a three-dimensional orthogonal coordinate system including a Z-axis having a vertically upward direction as a positive direction and a vertically downward direction as a negative direction. In the present embodiment, the positive direction of the X axis in the orthogonal coordinate system is defined as the front of the lifting device.

  In addition, in the following, with regard to a plurality of constituent elements, only one of the plurality of constituent elements may be assigned a reference numeral, and the other reference numerals may be omitted. In such a case, it is assumed that one with the reference numeral and the other have the same configuration.

  FIG. 1 is a front perspective view showing a configuration of a lifting device 10 according to the embodiment. As shown in FIG. 1, the lifting device 10 includes a frame 11, a carriage 12, a winch part 13, and a base part 14.

  The frame 11 is a frame formed in a substantially rectangular shape including a pair of guide rails 11 a arranged in parallel along the vertical direction and an upper bar 11 b, and is supported by the base portion 14.

  The carriage 12 further includes a bucket 12a and a carriage base 12b. The bucket 12a is a loading platform that is supported by the carriage base 12b and has a main surface disposed in a direction substantially parallel to the XY plane.

  The bucket 12a further includes a plurality of rollers 12aa having a rotation axis parallel to the Y-axis direction and arranged in parallel along the X-axis direction. By using such a roller 12aa, even if the load is heavy, the load can be easily placed on the bucket 12a.

  The carriage base 12b is a support for the bucket 12a, and is slidable along a pair of guide rails 11a. That is, the entire carriage 12 including the bucket 12a supported by the carriage base 12b moves up and down along the pair of guide rails 11a.

  In addition, the carriage base 12b is connected with the winch part 13 via the wire W (traction member). The winch portion 13 is a winch mechanism including a winding shaft (not shown) to which one end of the wire W is fastened. The carriage 12 moves up and down along the pair of guide rails 11a by winding and feeding the wire W in the winch portion 13.

  Next, the configuration of the lifting device 10 will be described in more detail with reference to FIG. FIG. 2 is a rear perspective view illustrating the configuration of the lifting device 10 according to the embodiment. In FIG. 2, the illustration of the upper crosspiece 11b shown in FIG. 1 is omitted.

  As shown in FIG. 2, the bucket 12a and the carriage base 12b can be detached (see the broken arrow in the figure). As shown in FIG. 2, the carriage base 12b has a substantially rectangular frame (hereinafter referred to as “base frame 12ba”) whose longitudinal direction is the distance between the pair of guide rails 11a.

  Here, a connection configuration between the carriage base 12b and the winch portion 13 via the wire W will be described. As shown in FIG. 2, one end of the wire W is fastened to a locking portion 11c provided on the upper bar 11b (see FIG. 1).

  As shown in FIG. 2, the wire W fastened to the locking portion 11c is stretched vertically downward and wound around a first pulley (not shown) inside the cover portion 12bb provided on the carriage base 12b. It is hung. The first pulley is a pulley that is pivotally supported by the cover portion 12bb so as to be rotatable about a rotation axis substantially parallel to the X axis.

  The cover portion 12bb is a cover member that covers the movable member such as the first pulley. Details of the configuration of the cover portion 12bb will be described later with reference to FIGS. 4A to 4C, including the configuration of the first pulley and other movable members.

  Subsequently, the wire W wound around the first pulley is stretched vertically upward and is wound around the second pulley (not shown) inside the connecting portion 11d provided on the upper bar 11b (see FIG. 1). . The second pulley is a pulley that is pivotally supported by the connecting portion 11d so as to be rotatable about a rotation axis substantially parallel to the Y axis.

  Then, as shown in FIG. 2, the wire W wound around the second pulley is stretched vertically downward and fastened to the winding shaft of the winch portion 13 described above.

  Here, as shown in FIG. 2, the winch part 13 has a handle 13a. The handle 13a is connected to a winding shaft of the winch portion 13, and the wire W is wound up and sent out by rotating the handle 13a.

  Next, the configuration of the carriage base 12b will be described with reference to FIG. FIG. 3 is a rear perspective view showing the configuration of the carriage base 12b.

  As shown in FIG. 3, the carriage base 12b includes a base frame 12ba, a cover portion 12bb, a horizontal bar 12bc, a connecting member 12bd, a coil spring 12be (biasing member), an abutting member 12bf, and a guide roller. 12bg and a guide roller 12bh.

  Although overlapping with the description in FIG. 2, the base frame 12ba is a substantially rectangular frame whose longitudinal direction is the distance direction between the pair of guide rails 11a (see FIG. 2). The cover portion 12bb is a cover member that covers the first pulley p1 and the horizontal bar 12bc and is attached to the base frame 12ba. Note that the wire W is wound around the first pulley p1 as described above.

  The horizontal bar 12bc is formed in a straight line, and is horizontally attached to the base frame 12ba (that is, the carriage 12) with play in the vertical direction via the cover portion 12bb.

  Here, the configuration of the cover portion 12bb will be described in more detail with reference to FIGS. 4A to 4C. FIG. 4A is a rear perspective view showing the configuration of the cover portion 12bb. 4B and 4C are front perspective views showing the configuration of the cover portion 12bb.

  As shown in FIG. 4A, the cover portion 12bb has an end surface on which a long hole 121 is formed. The long hole 121 is a through hole formed so that the long axis direction is parallel to the vertical direction (that is, the Z-axis direction). The cover portion 12bb supports the horizontal bar 12bc with play in the vertical direction by passing the horizontal bar 12bc through the long hole 121.

  As shown in FIG. 4A, a first pulley p1 is attached to the center of the horizontal bar 12bc so as to be rotatable about a rotation axis parallel to the X axis. Specifically, as shown in FIG. 4B, the first pulley p <b> 1 is provided with a rotation shaft passing through the central portion of the horizontal bar 12 bc.

  Further, as shown in FIG. 4C, the cover portion 12bb has an end surface in which a long hole 122 is formed. Like the long hole 121, the long hole 122 is a through hole formed so that the long axis direction is parallel to the vertical direction. The cover portion 12bb supports the first pulley p1 with play in the vertical direction together with the horizontal bar 12bc by passing the rotation shaft of the first pulley p1 through the long hole 122.

  In addition, as already demonstrated using FIG. 2, the wire W fastened with the securing part 11c (refer FIG. 2) is wound around the 1st pulley p1. Therefore, according to the configuration shown in FIGS. 4A to 4C, the first pulley p <b> 1 is pulled vertically upward by pulling the wire W, and the horizontal bar 12 bc is also lifted. That is, the horizontal bar 12bc is also a movable member.

  And, as shown in FIGS. 4A to 4C, in the present embodiment, the horizontal bar 12bc and the first pulley p1 which are such movable members are arranged along the skeleton of the base frame 12ba. The movable region of the movable member can be hidden behind the skeleton. Therefore, exposure of the movable region can be suppressed, and thus it is possible to sufficiently ensure safety during work.

  Further, by attaching the first pulley p1 to the central portion of the horizontal bar 12bc, the movable region based on the tension of the wire W is concentrated in the vicinity of the central portion, so that the cover portion 12bb covering this can be reduced in size. . Therefore, the weight of the carriage 12 can be reduced.

  Returning to the description of FIG. 3, the connecting member 12bd will be described. The connecting member 12bd is a member that is suspended and attached vertically downward from both ends of the horizontal bar 12bc. In addition, one end of the coil spring 12be is connected to the lower end of the connecting member 12bd.

  The other end of the coil spring 12be is locked to the base frame 12ba. The coil spring 12be is a tension spring and urges the horizontal bar 12bc vertically downward.

  Therefore, while the horizontal bar 12bc is pulled by the wire W with tension through the first pulley p1, the horizontal bar 12bc is held at a height corresponding to the uppermost position of the long hole 122. Is lost by the coil spring 12be, it moves vertically downward along the above-mentioned play.

  The connecting member 12bd and the coil spring 12be are also movable members. However, as shown in FIG. 3, the connecting member 12bd and the coil spring 12be are arranged along the skeleton of the base frame 12ba, so that the movable region of the movable member can be hidden behind the skeleton. . Therefore, exposure of the movable region can be suppressed, and safety during work can be sufficiently ensured.

  The contact member 12bf is a member that is pivotally supported by the base frame 12ba and contacts the guide rail 11a by rotating in conjunction with the downward movement of the horizontal bar 12bc along the above-described play. Details of the configuration of the contact member 12bf will be described later with reference to FIG. 5B.

  The guide roller 12bg and the guide roller 12bh are rotating members disposed on the side of the base frame 12ba facing the guide rail 11a.

  Here, the engagement configuration of the guide rail 11a and the carriage base 12b including the configuration of the guide roller 12bg and the guide roller 12bh will be described with reference to FIGS. 5A and 5B.

  FIG. 5A is a rear perspective view showing an engagement configuration between the guide rail 11a and the carriage base 12b. FIG. 5B is a rear perspective view showing the configuration of the contact member 12bf and the vicinity thereof. In FIG. 5A, only one of the guide rails 11a is provided with a reference numeral, and the other of the guide rails 11a is illustrated with a part of the shape omitted.

  As shown in FIG. 5A, the guide rail 11a is formed by a pair of opposing side walls 11aa and a back wall 11ab so that a cross-sectional shape cut along the XY plane forms a substantially U-shape. A plurality of notches 111 are formed in the back wall 11ab along the Z-axis direction.

  As shown in FIG. 5B, the guide roller 12bg is disposed at an upper and lower position with respect to the base frame 12ba so as to be able to rotate around a rotation axis parallel to the Y axis. Is done. The guide roller 12bg is slidably engaged with the guide rail 11a so that its outer peripheral surface rotates in contact with the inside of the side wall 11aa.

  Similarly, the guide roller 12bh is disposed so as to be able to rotate about a rotation axis parallel to the X axis with respect to the base frame 12ba, and the outer peripheral surface of the guide roller 11bh is a rear wall. 11ab is slidably engaged so as to rotate in contact with the inside.

  Therefore, the carriage base 12b is provided so as to be slidable along the guide rail 11a while being regulated from the two directions of the X-axis direction and the Y-axis direction. Thereby, the carriage base 12b can be slid along the guide rail 11a without shaking.

  Further, as shown in FIG. 5B, the contact member 12bf is disposed with its tip end directed toward the guide rail 11a. Note that the base end portion is pivotally supported by the connecting member 12bd so as to be rotatable around the axis a1. Further, at a portion slightly closer to the distal end portion from the pivot point of the shaft a1 at the base end portion, the base frame 12ba is pivotally supported so as to be able to rotate around the axis a2.

  Thereby, the contact member 12bf rotates around the axis a1 and the axis a2 in conjunction with the vertically downward movement of the connecting member 12bd (that is, the horizontal bar 12bc connected thereto) (see the arrow 501 in the drawing) The tip is lifted in the direction of the arrow 502 in the drawing and brought into contact with the guide rail 11a.

  As shown in FIG. 5B, the abutting member 12bf has a sawtooth engagement claw c1 at a portion that abuts on the guide rail 11a at the tip, and when abutting on the guide rail 11a, The engaging claw c1 is engaged with the notch 111 described above. And by this engagement, the carriage base 12b is regulated to slide along the guide rail 11a.

  Thereby, the downward movement of the horizontal bar 12bc along the above-described play, that is, the carriage 12 having lost the tension of the wire W can be prevented.

  In addition, in FIG. 5B, although the case where the engaging claw c1 was sawtooth-shaped was illustrated, it is not restricted to this, The unevenness | corrugation should just be formed. Therefore, the shape of the notch 111 is not limited as long as it is a shape that engages with the engaging claw c1.

  In addition, the case where the contact member 12bf is indirectly connected to the horizontal bar 12bc via the connecting member 12bd has been illustrated so far. However, the present invention is not limited to this and may be directly connected. Good.

  A modification in such a case will be described with reference to FIG. FIG. 6 is a schematic diagram showing a modification of the connection method of the contact member 12bf to the horizontal bar 12bc.

  That is, as shown in FIG. 6, the contact member 12bf may be directly connected to the horizontal bar 12bc. In such a case, the contact member 12bf may be pivotally supported by the end of the horizontal bar 12bc so that the base end of the contact member 12bf can be rotated about the axis a1.

  In addition, it is only necessary to pivotally support the base frame 12ba so that it can be rotated around the axis a2 in a portion slightly closer to the distal end portion of the base end portion.

  Then, as shown in FIG. 6, the coil spring 12be may urge the horizontal bar 12bc vertically downward from a position slightly inward near the end of the horizontal bar 12bc, for example. In FIG. 6, only one end side of the horizontal bar 12bc is illustrated, but the other end side may have a similar configuration that is different only in the left and right directions. At this time, the coil spring 12be is preferably arranged at a position where the horizontal bar 12bc can be urged vertically downward while keeping the horizontal bar 12bc horizontal.

  Also according to such a modification, the abutting member 12bf rotates around the axis a1 and the axis a2 in conjunction with the vertical downward movement of the horizontal bar 12bc (see the arrow 601 in the figure), and the tip portion is shown in the figure. It can be lifted in the direction of the arrow 602 and brought into contact with the guide rail 11a.

  By the way, so far, the case where the horizontal bar 12bc is kept horizontal even when it is moved vertically downward has been described by urging evenly by a pair of coil springs 12be. Here, it is good also as ensuring the point which keeps this horizontal bar 12bc horizontal, considering the engagement structure with cover part 12bb.

  A modification in such a case will be described with reference to FIGS. 7A and 7B. FIG. 7A and FIG. 7B are schematic views showing a modification of the engagement configuration between the cover portion 12bb and the horizontal bar 12bc.

  As shown in FIG. 7A, the rotational axis of the first pulley p1 is formed so as to have, for example, a substantially rectangular cross section (see the hatched portion in the drawing) in which only the end portion does not rotate, and then this end portion and the long hole 122 And the first pulley p1 may be attached to the horizontal bar 12bc.

  In such a case, the end of the rotation shaft of the first pulley p1 is in surface contact with the inner peripheral surface of the long hole 122 in the short axis direction of the long hole 122 (see the double-headed arrow 701 in the figure), so that the horizontal bar 12bc can be secured. It can be moved vertically downward along the long hole 122 (see arrow 702 in the figure).

  The rotational axis of the first pulley p1 is not limited to the shape illustrated in FIG. 7A, and includes a shape including an outer peripheral surface that is in surface contact with the inner peripheral surface of the long hole 122 in the short axis direction of the long hole 122. I just need it.

  Further, as shown in FIG. 7B, the guide hole 122G extending in the vertical direction is formed in the cover portion 12bb and the projection pr is provided in the horizontal bar 12bc, and the guide hole 122G and the projection pr are engaged with each other. It is good as well.

  Accordingly, the horizontal bar 12bc can be guided not only by the long hole 122 but also by the guide hole 122G, so that the horizontal bar 12bc can be reliably moved vertically downward.

  Further, by reliably moving the horizontal bar 12bc vertically downward, the contact member 12bf can be reliably contacted with the guide rail 11a at the same time. That is, the carriage 12 can be reliably prevented from falling.

  As described above, the lifting device according to the embodiment includes a pair of guide rails, a carriage, a horizontal bar, a wire (traction member), a coil spring (biasing member), and a contact member. .

  The pair of guide rails are arranged in parallel along the vertical direction. The carriage is slidable along a pair of guide rails. The horizontal bar is formed in a straight line and is horizontally attached to the carriage with play in the vertical direction.

  The wire is connected to the central portion of the horizontal bar and pulls the horizontal bar vertically upward. The coil spring is connected to the horizontal bar and biases the horizontal bar vertically downward. The abutting member is pivotally supported by the carriage, and abuts against the guide rail by rotating in conjunction with the downward movement of the horizontal bar along the play.

  Therefore, according to the lifting device according to the embodiment, it is possible to sufficiently ensure safety during work.

  In the above-described embodiment, the case where the horizontal bar is urged vertically downward by a pair of coil springs is taken as an example. However, if the horizontal bar can be held horizontally, the number of coil springs and the mounting position are determined. It is not limited.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

DESCRIPTION OF SYMBOLS 10 Lifting device 11 Frame 11a Guide rail 11aa Side wall 11ab Back wall 11b Upper crosspiece 11c Locking part 11d Connection part 12 Carriage 12a Bucket 12aa Roller 12b Carriage base 12ba Base frame 12bb Cover part 12bc Horizontal bar 12bf Coupling member 12be Coil Member 12bg guide roller 12bh guide roller 13 winch part 13a handle 14 base part 111 notch 121 long hole 122 long hole 122G guide hole W wire c1 engaging claw p1 first pulley pr protrusion

Claims (5)

A pair of guide rails arranged in parallel along the vertical direction;
A carriage slidably provided along the pair of guide rails;
A horizontal bar formed in a straight line and mounted horizontally on the carriage with play in the vertical direction;
A pulley provided with a rotation shaft passing through a central portion of the horizontal bar;
A pulling member that pulls the horizontal bar vertically upward through the pulley ;
A biasing member connected to the horizontal bar and biasing the horizontal bar vertically downward;
An abutting member pivotally supported by the carriage, and abutting against the guide rail by rotating in conjunction with the downward movement of the horizontal bar along the play ;
The horizontal bar and the pulley are
And Turkey are disposed the along a backbone such that the movable region hidden behind a skeleton of the carriage
Lifting device characterized by the above. The contact member is
It has an engaging claw with irregularities formed on the part that comes into contact with the guide rail,
In the guide rail,
The lifting device according to claim 1, wherein a notch having a shape that engages with the engaging claw is formed. The carriage is
Lifting apparatus according to claim 1 or 2, characterized in that a cover member which is Kutsugae設to a portion of the horizontal bar of the pulleys and該滑vehicles vicinity. The cover member is
An end surface that supports the horizontal bar through the end, and an end surface that supports the shaft through the shaft of the pulley;
The elevating device according to claim 3 , wherein the through-hole provided in each of the end surfaces is a long hole formed so that the major axis direction is parallel to the vertical direction. The rotation axis of the pulley is
The lifting device according to claim 4 , wherein the lifting device has a shape including an outer peripheral surface in surface contact with an inner peripheral surface of the long hole in a short axis direction of the long hole.

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