JP2006168968A - Crane equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide crane equipment capable of being used for general purposes of various vehicles and preventing looseness of a power cable. <P>SOLUTION: This crane equipment 1 hangs and supports articles and moves them in the vertical or horizontal direction. A post 13A and/or an arm 13B are extensively constituted, and a wire length adjusting mechanism 20 for adjusting the length of a wire 14 inside the post 13A and/or the arm 13B is provided. When the length of the post 13A and/or the arm 13B is changed, the wire length adjusting mechanism 20 makes the wire 14 longer or shorter in accordance with the degree of the change in the length of the post 13A and/or the arm 13B. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a crane device that suspends and supports articles and moves them vertically or horizontally. In particular, when changing the length of a telescopic post or arm, the occurrence of slack in the wire passing through the post is prevented. The present invention relates to a crane apparatus.

  Conventionally, in a vehicle such as an automobile that can be equipped with a wheelchair, a wheelchair user or an assistant has carried the wheelchair into the vehicle by himself. In recent years, a crane device has been installed in the vehicle. It is designed to reduce the burden of storage work for users.

  As a crane device, for example, a crane device 100 as shown in FIG. 6 is known. The crane device 100 includes a post 101, an arm 103 that is rotatably supported by the post 101 via a hinge mechanism 102, and a hanger device 104 attached to the tip of the arm 103.

The hanger device 104 is for raising and lowering a wheelchair by placing a wheelchair on a hook 105 attached to the tip of a wire, and includes a pulley around which a wire is wound and a motor that rotates the pulley. Note that the arm 103 of the illustrated crane device 100 includes a first arm 103A supported by the post 101, a second arm 103B having a hanger device 104 at the tip, and a second arm 103B in the vicinity of the tip of the first arm 103A. An intermediate hinge mechanism 103C that is rotatably supported is provided, and the intermediate hinge mechanism 103C can be folded in half. A power cable 106 is provided through the post 101 and the arm 103 in order to supply electricity to the motor in the hanger device 104 at the tip of the arm.
The crane apparatus 100 configured as described above is used after the lower portion of the post 101 is fixedly attached to a vehicle body or a floor deck.

  As a procedure for loading a wheelchair outside the vehicle on the deck floor of the vehicle using this type of crane device, the arm 103 is rotated to move the hanger device 104 at the tip of the arm to a position above the wheelchair outside the vehicle. Then, the lifting wire is pulled out from the hanger device 104, and the wheelchair is hung on the hook 105 at the tip of the wire.

  Next, the motor in the hanger device 104 is driven, the drawn wire is wound around a pulley, and the wheelchair is lifted. When the wheelchair is lifted to a desired height, rotation of the pulley by the motor is stopped, and the arm 103 is rotated while the height is maintained, and the wheelchair is put into the vehicle. Then, the pulley is reversely rotated by the motor to pull out the wire from the hanger device 104, the wheelchair is gradually lowered, and the wheelchair is landed on the deck floor.

  When the wheelchair lands on the deck floor, the rotation of the motor is stopped and the hook 105 is removed from the wheelchair. And a motor is rotated, a wire is wound around a pulley, and a wire is accommodated in a hanger apparatus. On the other hand, the loading operation of the wheelchair is completed by fixing the wheelchair to the deck floor using a fixing means such as a belt attached to the deck floor.

In the crane apparatus 100 shown in FIG. 6, the arm 103 is composed of a first arm 103A and a second arm 103B so that the second arm 103B can rotate with respect to the first arm 103A. Therefore, it is possible to flexibly select the landing position of the wheelchair in the vehicle by rotating the second arm 103B while the wheelchair is lifted.
Such a crane apparatus 100 is disclosed in Patent Document 1.
JP 2001-151468 A (FIG. 1)

  However, in order to install the crane apparatus 100 as shown in Patent Document 1 in a vehicle having various body shapes, the size of the post 101 and the arm 103 is set to each dimension because the width of the cabin space is different for each vehicle. The crane apparatus 100 had to be manufactured individually in accordance with the vehicle compartment space.

  In consideration of such circumstances, it is conceivable to configure the crane apparatus 100 so that the length of the post 101 and / or the arm 103 can be expanded and contracted so that it can be used for various vehicles. If the length of the arm 103 is made extendable, the power cable 106 disposed in the post 101 and the arm 103 has a fixed length. Therefore, if the length of the post 101 or the arm 103 is shortened, the power When the slack of the cable 106 occurs and the length of the post 101 or the arm is increased, the power cable 106 may be stretched and a strong force may act on the power cable. Such loosening of the power cable 106 may cause a device failure. It is also conceivable that the crane device is configured such that the hanger device 104 is disposed below the post 101 and the wire is inserted through the post 101 or the arm 103 and pulled out from the tip of the arm 103. Can prevent the power cable 106 from slackening. For example, if the length of the post 101 or the arm 103 is shortened, loosening of the wire occurs inside the post 101 or the arm 103. Looseness can also cause device malfunction.

  Therefore, the present invention was created in view of such circumstances, and provides a crane apparatus that can be used for various vehicles and that prevents the occurrence of loosening of wires in posts and arms. With the goal.

  To achieve the above object, the present invention provides a hollow post, a hollow arm supported by the post, a wire that passes through the post and the arm and is drawn from the tip of the arm, and a tip of the wire. Crane apparatus comprising a wire return stopper and a hook, a pulley for winding the wire, and a motor for moving the hook up and down by rotating the pulley, and supporting the article in a suspended or moving manner in the vertical or horizontal direction The post and / or the arm is configured to be stretchable and includes a wire length adjusting mechanism that adjusts the wire length in the post and / or the arm. When the length of the post and / or the arm is changed, the wire The length adjusting mechanism is characterized in that the wire is lengthened or shortened according to the degree of change in the length of the post and / or the arm.

  In the crane device of the present invention, preferably, the wire length adjusting mechanism includes an elastic member or an elastic member that urges a pulley to rotate so as to wind the wire, and the post and / or the arm is shortened. When the pulley is rotated by the elastic member or elastic member, the excess wire is wound up, and when the post and / or the arm is lengthened, the pulley rotates reversely against the biasing force of the elastic member or elastic member. Then, a desired length of wire is pulled out of the pulley.

  In the crane apparatus of the present invention, preferably, a first plate is provided at the tip of the rotating shaft of the motor, a ball screw is provided so as to extend from the first plate to an extension line of the rotating shaft, and the tip of the ball screw. The second plate is provided, and the first plate, the ball screw, and the second plate are configured to rotate together with the rotation shaft, and the pulley is attached to the ball screw via the ball bush, When the elastic member is disposed between the pulley and the second plate and the motor is driven, the pulley rotates together with the first plate, the ball screw, and the second plate, and the length of the post and / or arm When the pulley is changed, the pulley rotates independently around the ball screw, so that excess wire is wound around the pulley or the pulley of the desired length is wound. Yer is pulled out from the pulley.

  Furthermore, in the crane apparatus of the present invention, it is desirable that the pulley is connected to an elastic machine member or an elastic member via a bearing member. For example, a compression spring can be used as the bullet member.

  Thus, according to the crane device of the present invention, when the length of the post and / or the arm is changed, the wire corresponding to the degree of expansion / contraction of the post or the arm accompanying the change is wound around the pulley or pulled out from the pulley. It is. In that case, since the crane apparatus is provided with the wire length adjusting mechanism, the pulley can always pull the wire with an appropriate force, and the wire tension in the post and the arm can be always kept constant.

  Therefore, it is possible to prevent the wire from slacking in the post and the arm and the extremely strong force from acting on the wire. Thereby, the failure of the crane apparatus caused by the slack of the wire or the like does not occur in the present invention.

  Further, even if the lengths of the post and the arm are changed, there is no cause of failure due to loosening of the wire, etc., so the crane device of the present invention can be used by being attached to various vehicles having different cabin space. Therefore, compared with the crane apparatus 100 which conventionally had to be manufactured individually by adjusting the length of the post or arm for each vehicle, the present invention has much higher degree of freedom and versatility. is there.

  In addition, when the crane apparatus of the present invention is installed in a different vehicle, it can prevent loosening of the wire accompanying the change in the length of the post or arm. Also, when the arm or post is retracted from the use state where the post is extended or the post is extended, the slack of the wire can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing a crane apparatus 1 according to an embodiment of the present invention. The crane apparatus 1 includes a wire winding device 11, a case 12 that houses the wire winding device 11, an expansion / contraction post 13A that is erected on the case 12, and an expansion / contraction arm 13B that is supported by the expansion / contraction post 13A. Yes.

  The telescopic post 13A and the telescopic arm 13B are configured by connecting three cylindrical members. Specifically, the first cylindrical member 131 fixed to the case 12, the inner surface of the first cylindrical member 131, An L-shaped second cylindrical member 132 slidably attached to the first cylindrical member 131 and a second cylindrical member 132 slidable on the inner surface of the second cylindrical member 132 on the distal end side of the second cylindrical member 132. The third cylinder member 133 is attached.

  And the crane apparatus 1 can change the height of a post | mailbox by moving the 2nd cylinder member 132 to the arrow A direction with respect to the 1st cylinder member 131, and the 3rd cylinder member 133 is the 2nd cylinder. The length of the arm can be changed by moving in the arrow B direction with respect to the member 132. Although the first cylinder member 131 and the second cylinder member 132 are not shown, and the second cylinder member 132 and the third cylinder member 133 are not shown, the length is adjusted by a length adjusting stopper such as a screw. It can be locked to a certain level. Further, the second cylinder member 132 can rotate about the vertical axis with respect to the first cylinder member 131.

  The wire 14 extends through the first cylindrical member 131, the second cylindrical member 132, and the third cylindrical member 133 that are connected in this way, from the inside of the case 12 toward the opening 13B1 at the tip of the arm. The tip of the third cylindrical member 133 is bent and the opening 13B1 is opened downward. Pulleys 15 </ b> A and 15 </ b> B are provided at bent portions of the telescopic post 13 </ b> A and the telescopic arm 13 </ b> B so that the wire 14 can smoothly move through the cylindrical members 131 to 133.

  A stopper 16 for restricting the return of the wire 14 is attached to the wire 14 drawn out from the opening 13B1 of the third cylinder member 133, and a hook 17 for hanging a wheelchair on the tip of the wire 14 extending from the stopper 16 is attached. Is provided.

  The crane device 1 having the telescopic post 13A and the telescopic arm 13B configured as described above is used by being fixedly attached to a vehicle deck floor 50 or the like, similarly to the conventional crane device 100 (see FIG. 6). When the wheelchair is loaded in the vehicle, the hook 17 can be raised and lowered, the wheelchair hung on the hook 17 can be lifted or lowered, and the telescopic arm 13B is rotated. Thus, the lifted wheelchair can be moved horizontally. In addition, by driving the motor 18 provided in the case 12, the pulley 19 which winds and accommodates the wire 14 is rotated in the forward direction or the reverse direction, and the hook 17 is raised and lowered.

  Furthermore, the crane apparatus 1 configured as described above is installed in the vehicle after adjusting the telescopic posts 13A and the telescopic arms 13B to a predetermined height and length when installed in the vehicle. For example, when the vehicle interior space of the installation destination vehicle is narrow, it is necessary to shorten the telescopic posts 13A and the telescopic arms 13B extended as shown in FIG. 1 as shown in FIG. 2 so as to fit the vehicle interior space of the installation destination. is there. At this time, if the telescopic post 13A and the telescopic arm 13B are shortened, the wire 14 is loosened in the telescopic post 13A and the telescopic arm 13B.

In order to prevent such slack, etc., the crane apparatus 1 according to the embodiment of the present invention includes a wire length adjustment mechanism 20.
As shown in FIG. 1, the wire length adjusting mechanism 20 extends on the first plate 21 attached to the rotating shaft 18 </ b> A of the motor 18 and an extension line of the rotating shaft 18 </ b> A of the motor 18, and extends from the first plate 21. A ball screw 22 provided; the pulley 19 movable along the length of the ball screw 22 via a ball bush 23 (see FIG. 3); and a second plate 24 attached to the tip of the ball screw 22. A rotating shaft 25 extending on an extension line of the rotating shaft 18A of the motor 18 and projecting from the second plate 24 and rotating together with the rotating shaft 18A, the first plate 21, the ball bush 23 and the second plate 24, and a case A bracket 26 that is fixed in the frame 12 and pivotally supports the rotary shaft 25; and a compression spring 27 that biases the pulley 19 toward the first plate 21. , And a. Furthermore, stoppers 21 </ b> A and 24 </ b> A are attached to the first plate 21 and the second plate 24.

  Here, the pulley 19 can be rotated integrally with the ball screw 22 by the rotation of the motor 18, and further, by the urging force of the compression spring 27 as described below, the pulley 19 is rotated separately from the rotation by the motor 18. It can rotate around and move from the first plate 21 side toward the second plate 24 side or from the second plate 24 side toward the first plate 21 side.

  For this reason, a groove 22 </ b> A is spirally formed on the surface of the ball screw 22, and a convex portion 23 </ b> A (see FIG. 3) corresponding to the groove 22 </ b> A is spirally formed on the surface of the ball bush 23. . Then, when the convex portion 23A of the ball bush 23 is fitted into the spiral groove 22A of the ball screw 22 and the pulley 19 rotates in this state, for example, the pulley 19 positioned closest to the second plate 24 as shown in FIG. Rotates, the pulley 19 moves toward the first plate 21.

  In order to give such rotation to the pulley 19, a compression spring 27 is disposed between the pulley 19 and the second plate 24. The compression spring 27 is formed in a coil shape, and one end is fixed to the pulley 19 and the other end is fixed to the second plate 24. In addition, the pulley 19 and the compression spring 27 are connected by, for example, a connection structure 30 as shown in FIG. 3 so that the compression spring 27 does not hinder the rotation of the pulley 19.

  Here, FIG. 3 is a view showing a connection structure 30 between the pulley 19 and the compression spring 27, and the upper side of the alternate long and short dash line in the drawing shows a cross-sectional view. As shown in FIG. 3, the coupling structure 30 has a ring-shaped pressing plate 31 fixed to the side surface of the pulley 19 with screws 32, and a ball bearing 33 slidably disposed on the inner peripheral surface of the pressing plate 31. Is disposed. According to such a configuration, since the ball bearing 33 slides in the holding plate 31, the pulley 19 can rotate regardless of the expansion and contraction of the compression spring 27.

Since the pulley 19 is configured to be independently rotatable around the ball screw 22 as described above, the pulley 19 can move between the first plate 21 and the second plate 24.
Here, FIG. 1 shows a state in which the telescopic post 13A and the telescopic arm 13B are most extended, and the pulley 19 contacts the stopper 24A of the second plate 24 with the telescopic post 13A and the telescopic arm 13B extending most. On the other hand, FIG. 2 shows a state in which the telescopic post 13A and the telescopic arm 13B are most contracted, and the pulley 19 is attached to the stopper 21A of the first plate 21 in a state in which the telescopic post 13A and the telescopic arm 13B are contracted most. I'm in contact. When the telescopic post 13A and the telescopic arm 13B are extended so as to change from the state shown in FIG. 2 to the state shown in FIG. 1, the pulley 19 moves from the first plate 21 side to the second plate 24 side.

  The wire 14 having a length obtained by adding the expansion / contraction amount of the expansion / contraction post 13A and the expansion / contraction amount of the expansion / contraction arm 13B is wound around the pulley 19 by rotating the pulley 19 around the ball screw 22, or the pulley 19 Can be pulled out from. In addition, the wire length wound up by the pulley 19 may be set larger than the length obtained by adding the expansion / contraction amount of the expansion / contraction post 13A and the expansion / contraction amount of the expansion / contraction arm 13B.

  Furthermore, in the crane apparatus 1 according to the embodiment of the present invention, the first proximity sensor 28A is disposed on the case bottom of the first plate 21 near the stopper 21A. The first proximity sensor 28 </ b> A detects a state in which the pulley 19 is close to the first plate 21. Further, a lamp for displaying the detection result by the proximity sensor 28A is provided on the surface of the case, although not shown.

  Moreover, the crane apparatus 1 arrange | positions the 2nd proximity sensor 28B by the case bottom near the stopper 24A of the 2nd plate 24. FIG. The second proximity sensor 28 </ b> B detects a state in which the pulley 19 is close to the second plate 24. The detection result of the second proximity sensor 28B is also displayed to the user by lighting of another lamp (not shown) provided on the case surface.

The effect | action of the crane apparatus 1 which concerns on the said embodiment is demonstrated. First, the case where the telescopic post 13A and the telescopic arm 13B are changed from the most expanded state to the most contracted state will be described.
When the telescopic post 13A and the telescopic arm 13B are contracted from the state shown in FIG. 1 to the state shown in FIG. 2, the wire 14 can be loosened in the telescopic post 13A and the telescopic arm 13B. As the telescopic arm 13B contracts, the telescopic post 13A and the wire 14 in the telescopic arm 13B are wound up by the pulley 19.

  That is, a biasing force that is rotated by the compression spring 27 always acts on the pulley 19, and the tension in the direction in which the wire 14 in the telescopic post 13 </ b> A and the telescopic arm 13 </ b> B is always wound around the pulley 19 by this force. is working. Therefore, as the telescopic post 13A and the telescopic arm 13B contract, the pulley 19 rotates while moving from the second plate 24 side to the first plate 21 side, and the wire 14 is sequentially wound.

  When the telescopic post 13 </ b> A and the telescopic arm 13 </ b> B reach the most contracted state, the pulley 19 comes into contact with the stopper 21 </ b> A of the first plate 21. At this time, the first proximity sensor 28A detects the pulley 19 and the lamp attached to the case surface is turned on.

Next, the case where the telescopic post 13A and the telescopic arm 13B are changed from the most contracted state to the most expanded state will be described.
When the telescopic post 13A and the telescopic arm 13B as shown in FIG. 2 are stretched as shown in FIG. 1, the wire 14 pulls the pulley 19, and the pulley 19 resists the urging force of the compression spring 27. It moves from the first plate 21 side to the second plate 24 side while rotating. With this rotation, the wire 14 is pulled out from the pulley 19. When the pulley 19 approaches a position where it comes into contact with the stopper 24A of the second plate 24, the second proximity sensor 28B detects the pulley 19 and the corresponding lamp is turned on.

  In addition, the case where the length is changed from the state where the telescopic post 13A and the telescopic arm 13B are most extended to the state where the telescopic post 13A is most contracted, and vice versa, are illustrated, but from the most extended state to an arbitrary length. Also in the case of contraction, the pulley 19 is rotated by the urging force of the compression spring 27 and winds up the excess of the wire 14. Also, when the telescopic post 13A and the telescopic arm 13B are extended to an arbitrary length from the most contracted state, the pulley 19 rotates while moving toward the second plate 24 against the biasing force of the compression spring 27. Then, the wire 14 having a desired length is pulled out from the pulley 19.

Next, the case where a wheelchair is suspended using the crane apparatus 1 which concerns on embodiment of this invention is demonstrated.
As shown in FIG. 1, when the wheelchair is suspended in a state where the telescopic post 13 </ b> A and the telescopic arm 13 </ b> B are extended, it is necessary to pull out a necessary amount of the wire 14 and lower the hook 17. Therefore, the motor 18 is rotated so as to lower the hook 17.

  Here, the wire 17 is not pulled out from the pulley 19 and the hook 17 is maintained at a constant height from the start of the rotation of the motor 18 until a predetermined time. That is, when the motor 18 starts to rotate, the pulley 19 moves along the ball screw 22 toward the stopper 21 </ b> A by the urging force of the compression spring 27. At this time, the ball screw 22 is rotated by the motor 18 in the pulley 19, but the pulley 19 itself does not rotate but only moves along the ball screw 22 until it comes into contact with the stopper 21 </ b> A on the first plate 21 side.

  Then, as shown in FIG. 4A, when the pulley 19 hits the stopper 21A on the first plate side, the first proximity sensor 28A is turned on and the sliding movement of the pulley 19 along the ball screw 22 is restricted. Thus, the pulley 19 rotates together with the ball screw 22 according to the rotation of the motor 18, and this rotation causes the wire 14 to be drawn from the pulley 19 and the hook 17 starts to descend. However, when the motor 18 is rotated in the direction in which the hook 17 descends while pulling the hook 17 and the wire 14 by hand or with the load hung on the hook 17 from the beginning, the load is applied to the wire 14. The pulley 19 rotates together with the ball screw 22 by the rotation of the motor 18 without leaving the stopper 24A on the second plate 24 side, the wire 14 is pulled out from the pulley 19, and the hook 17 starts to descend.

  Even if the rotation of the motor 18 is stopped while the hook 17 is being lowered, the wire 14 can be easily pulled out by pulling the hook 17 by hand. At this time, since the load is applied to the wire 14, the pulley 19 rotates around the ball screw 22 while pushing the compression spring 27 and moves toward the second plate 24 side, as shown in FIG. It contacts the stopper 24A on the second plate side.

  As shown in FIGS. 5A and 5B, when the wheelchair 60 is actually suspended, that is, when the wire 14 is loaded, the pulley 19 is always pressed against the stopper 24A on the second plate side. As it is, it rotates with the motor 18 and the ball screw 22 and the hook 17 moves up and down.

  Further, after the wheelchair 60 is moved to the desired height position, when the hook 17 is removed from the wheelchair 60, the pulley 19 rotates around the ball screw 22 while winding the unloaded wire 14 by the repulsive force of the compression spring 27. , Moving toward the first plate 21. Here, when the height at the end of use is higher than at the beginning of suspension, for example, when moving from the ground to the deck floor 50, the pulley 19 at the end of use as shown in FIG. Before reaching the first plate 21, the stopper 16 attached to the wire 14 hits the opening 13B1 of the telescopic arm 13B, and the pulley 19 stops moving at that position. From this state, when the wheelchair placed on the deck floor 50 is lifted and taken out of the vehicle when it is used next time, if the wire 14 is pulled by hand, it is pulled out when the wheelchair is placed on the deck floor 50 last time. The wire 14 can be easily pulled out by the length of the wire 14.

  Thus, according to the crane apparatus 1 which concerns on embodiment of this invention, if the length of the expansion-contraction post 13A and / or expansion-contraction arm 13B is changed, the wire according to the expansion | extension degree of the post | mailbox and arm accompanying the change, It is wound around the pulley 19 or pulled out from the pulley 19. At that time, since the crane apparatus 1 includes the wire length adjusting mechanism 20, the pulley 19 always pulls the wire 14 with an appropriate force, and the wire tension in the telescopic post 13A and the telescopic arm 13B is always kept constant. Can do.

  Therefore, it is possible to prevent slack of the wire 14 in the telescopic post 13A and the telescopic arm 13B and an extremely strong force acting on the wire 14. Thereby, the slack etc. of the wire 14 which causes a name do not occur.

Moreover, even if the length of the telescopic post 13A and the telescopic arm 13B is changed, the crane device 1 according to the embodiment of the present invention has a structure in which failure due to loosening of the wire 14 does not occur. It can be used by attaching to various vehicles with different spaces.
Therefore, compared with the crane apparatus 100 which conventionally had to be manufactured individually by adjusting the length of the post or arm for each vehicle, the present invention has much higher degree of freedom and versatility. is there.

  Moreover, when the crane apparatus 1 which concerns on embodiment of this invention is installed in a different vehicle, in addition to being able to aim at prevention of the slack of the wire 14 accompanying the length change of the expansion-contraction post 13A or the expansion-contraction arm 13B, to a vehicle Even after installation, the wire 14 is prevented from loosening even when the telescopic arm 13A and the telescopic post 13B of the crane device 1 are extended to the retracted state when the telescopic arm 13A and the telescopic post 13B are contracted. can do.

  Furthermore, in the crane apparatus 1 according to the embodiment of the present invention, when the wheelchair is raised and lowered once, the unloaded wire 14 is quickly and automatically wound up by the pulley 19. Then, the next time it is used, it can be easily pulled out by the same amount as before. On the other hand, in the conventional crane device, the wire after use has been wound up by a motor, and when used, the hook has to be lowered to a position where the wheelchair can be lifted by operating the motor. However, the crane device according to the embodiment of the present invention 1, the required amount of wire 14 can be easily pulled out of the pulley 19 simply by pulling the wire 14 by hand and rotating the pulley 19 against the urging force of the compression spring 27. The time can be greatly shortened.

  And in the crane apparatus 1 which concerns on embodiment of this invention, the 1st proximity sensor 28A is wound up without the wire 14 loosening in the expansion-contraction post 13A and the expansion-contraction post 13B in the retracted state of the crane apparatus 1. Can be detected and displayed with a corresponding lamp to inform the user of the condition, so that the user can safely move the telescopic post 13A and the telescopic arm 13B from the stored state by using the lamp as a guide. Can stretch.

  Further, when the crane device 1 is changed from the storage state to the use state, when the telescopic post 13A and the telescopic arm 13B extend the longest, the corresponding lamp is turned on by the second proximity sensor 28B, so that the user can The lamp can be turned on to confirm that the telescopic post 13A and the telescopic arm 13B should not be extended any further.

  As described above, the present invention can be implemented in various forms without departing from the spirit of the invention. For example, in the above description, the case where the post and the arm can be expanded and contracted is illustrated, but only the post may be configured to expand and contract, or only the arm may be configured to expand and contract.

  Further, in the above description, the post and arm of the crane apparatus are constituted by three cylindrical members as the telescopic post 13A and the telescopic arm 13B, that is, the first cylindrical member, the second cylindrical member, and the third cylindrical member. Although the case was illustrated, it does not limit to this structure, What is necessary is just to form the cavity for inserting a wire inside.

  1 and 2 show the shape in which the extendable arm 13B extends in the horizontal direction, the extendable arm 13B may be inclined at a desired angle.

  In the above description, the arm can be rotated in the horizontal direction. However, for example, by providing a hinge mechanism 102 between the post and the arm as in the conventional crane device 100, the arm can be moved vertically in the vertical direction. You may comprise so that it can be made.

  In the above description, the coil-shaped compression spring 27 is illustrated, but the shape of the compression spring 27 is not limited to the coil shape, and it is needless to say that an elastic member such as a spring having another shape can be used. In addition, although the configuration in which the compression spring 27 pushes the pulley 19 toward the first plate 21 is illustrated, an extended spring is disposed between the first plate 21 and the pulley 19, and by the compression action of the extended spring, The pulley 19 can be configured to be pulled toward the first plate 21 side.

  In the above description, an elastic member such as a coiled spring is illustrated, but an elastic member such as a compressed rubber and an extended rubber can be used instead of the elastic member.

  In the above description, the position detection of the pulley 19 is detected by the proximity sensors 28A and 28B. However, regardless of non-contact, the device that detects the contact with the pulley 19 can be detected by the proximity sensors 28A and 28B. Of course, it may be used instead.

  Moreover, although the case where the crane apparatus 1 is used for wheelchair storage work and the like has been described above, the present invention is not limited to wheelchair storage work and is also used for storing other articles. Of course, it can be used.

It is a figure which shows a crane apparatus in embodiment of this invention. It is a figure which shows a crane apparatus in embodiment of this invention. In the crane apparatus which concerns on embodiment of this invention, it is a fragmentary sectional view which shows the connection structure of a pulley and a compression spring. (A)-(C) are the figures for demonstrating the use condition of the crane apparatus which concerns on embodiment of this invention, respectively. (A) And (B) is a figure for demonstrating the use condition of the crane apparatus which concerns on embodiment of this invention, respectively. It is a perspective view which shows the conventional crane apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crane apparatus 11 Wire winding device 12 Case 13A Telescopic post 13B Telescopic arm 13B1 Opening 14 Wire 15A, 15B, 19 Pulley 16, 21A, 24A Stopper 17 Hook 18 Motor 18A, 25 Rotating shaft 20 Wire length adjustment mechanism 21 1st plate 22 Ball screw 22A Groove 23 Ball bushing 23A Protruding part 24 Second plate 26 Bracket 27 Compression spring 28A First proximity sensor 28B Second proximity sensor 30 Connection structure 31 Holding plate 32 Screw 33 Ball bearing 50 Deck floor 131 First cylinder member 132 Second cylinder member 133 Third cylinder member

Claims (5)

A hollow post, a hollow arm supported by the post, a wire drawn from the tip of the arm through the post and the arm, a wire return stopper and a hook provided at the tip of the wire, A crane device that includes a pulley that winds the wire, and a motor that moves the hook up and down by rotating the pulley, and supports the article by hanging and moving it vertically or horizontally. ,
The post and / or the arm is configured to be telescopic,
A wire length adjusting mechanism for adjusting the wire length in the post and / or the arm;
When the length of the post and / or the arm is changed, the wire length adjusting mechanism lengthens or shortens the wire according to a change degree of the length of the post and / or the arm. , Crane equipment. The wire length adjusting mechanism includes an elastic member or an elastic member that urges the pulley to rotate so as to wind up the wire;
When shortening the post and / or the arm, the pulley is rotated by the elastic member or the elastic member, and the excess wire is wound up,
When the post and / or the arm is lengthened, the pulley rotates backward against the urging force of the elastic member or the elastic member, and a wire having a desired length is pulled out from the pulley. The crane apparatus according to claim 1. A first plate is provided at the tip of the rotating shaft of the motor, a ball screw is provided so as to extend from the first plate onto an extension line of the rotating shaft, and a second plate is provided at the tip of the ball screw. The first plate, the ball screw, and the second plate are configured to rotate together with the rotating shaft,
The pulley is attached to the ball screw via a ball bush, and the elastic member or the elastic member is disposed between the pulley and the second plate,
When the motor is driven, the pulley rotates together with the first plate, the ball screw, and the second plate,
When the length of the post and / or the arm is changed, the pulley rotates independently around the ball screw, and an excess wire is wound around the pulley, or a wire having a desired length is wound on the pulley. The crane device according to claim 2, wherein the crane device is pulled out from the crane.   The crane apparatus according to claim 3, wherein the pulley is connected to the elastic member or the elastic member via a bearing member. The crane apparatus according to any one of claims 1 to 4, wherein the bullet member is a compression spring.

Images