JP5046041B2 - Pallet support device - Google Patents

Description

  The present invention relates to a pallet support device that is provided in a multilevel parking device and prevents a pallet on which a vehicle is placed from dropping.

2. Description of the Related Art As a conventional pallet support device for a multilevel parking device, there is a pallet support device that includes an arm portion that is swingably supported between a contact position at which a pallet can be contacted and a retracted position at which the pallet cannot be contacted. (For example, refer to Patent Document 1). In such a pallet support device, in a normal operation, the arm portion swings to the upper retracted position as the pallet rises, and when the pallet rises to a predetermined position beyond the position of the arm portion, the arm portion is hit. Return to contact position. Further, as the pallet descends, the arm part swings to the lower retreat position, and when the pallet descends to a predetermined position beyond the position of the arm part, the arm returns to the contact position.
JP-A-8-120959

  By the way, in the three-dimensional parking apparatus as described above, the pallet is lifted from a predetermined position due to, for example, a detection position shift of a sensor that detects the pallet lift position or an emergency stop during the pallet lift by operating the emergency stop button. May also be low. If the pallet rises lower than the predetermined position and stops at a position that does not exceed the position of the arm, the tip of the arm is caught on the pallet and the arm stops without returning to the contact position. It can be considered. If the descent of the pallet is started in this state, the arm portion does not swing downward, and there is a possibility that the pallet that is caught on the tip of the arm portion is tilted.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pallet support device that can prevent the pallet from tilting when the pallet is lowered even when the raised position of the pallet is lower than a predetermined position. And

  In order to solve the above-mentioned problems, a pallet support device according to the present invention is provided in a multi-story parking device provided with a pallet that is lifted and lowered between a plurality of parking units arranged in the vertical direction. A pallet support device that prevents a pallet from falling, and an arm part that abuts on the pallet and swings up and down as the pallet moves up and down, and when the pallet stops contacting the arm part, the arm part is moved to the pallet. Arm position return means for returning to a contact position where the arm portion can come into contact with, and swing regulation means for restricting the arm portion returned to the contact position from swinging downward. A friction reducing means for reducing friction when the pallet comes into contact is provided.

  In normal operation, this pallet support device is capable of abutting the arm portion against the pallet when the arm portion swings as the pallet of the multilevel parking device moves up and down and the pallet stops contacting the arm portion. Return to contact position. Then, by restricting the downward swing of the arm part returned to the contact position, the pallet is supported by the arm part even if the pallet is dropped. In this pallet support device, friction reducing means for reducing friction when the pallet comes into contact is provided at the tip of the arm portion. Therefore, even if the ascent of the pallet is lower than the predetermined position and the arm is stopped with the tip of the arm caught on the pallet, the pallet slips from the tip of the arm when the pallet starts to descend. Thus, the pallet can be prevented from tilting.

  Further, the friction reducing means is preferably a roller that is pivotally supported at the tip of the arm portion. By using the roller, the pallet can be slid more reliably from the tip of the arm. Further, sufficient weather resistance and durability can be ensured as compared with the case of using a friction reducing tape or the like.

  Moreover, it is preferable that the tip of the arm portion is rounded, and the curvature of the roller is substantially the same as the curvature of the tip. With such a roller configuration, the pallet can be more reliably slid from the tip of the arm.

  The roller is preferably made of polyacetal. In this case, the weather resistance and durability of the roller can be further ensured.

  In addition, the arm position return means includes a first spring member that biases the arm portion so that the arm portion returns to the contact position from the position where the arm portion swings downward, and the arm portion returns from the position where the arm portion swings upward. And a second spring member that biases the arm portion so as to return to the contact position. In this case, a solenoid or the like for swinging the arm portion is not necessary, so that the cost and size of the apparatus can be reduced.

  Preferably, the first spring member abuts on the arm portion and biases the arm portion, and the contact state with the arm portion is released when the arm portion swings upward from the contact position. . In this case, when the arm portion swings upward from the contact position, it is possible to prevent a force from acting on the first spring member in the extending direction, and the reliability of the first spring member can be improved. Further, it is not necessary to fix the first spring member to the arm portion, and the first spring member can be easily assembled.

  The first spring member and the second spring member are preferably torsion coil springs. If it carries out like this, the structure which returns an arm part to a contact position is realizable easily and at low cost.

  The swing restricting means includes a lever member having an abutting portion that abuts the arm portion and restricts the downward swinging of the arm portion, and a lower portion of the arm portion by the abutting portion when the pallet is lowered. And an actuator that swings the lever member so that the swing restriction is released. If it carries out like this, the structure which controls the rocking | fluctuation to the downward direction of an arm part is realizable easily and at low cost.

  The swing restricting means further includes a load receiving member that comes into contact with the lever member and receives a load from the pallet when the pallet hits the arm portion that is controlled to swing downward in the contact position. It is preferable to provide. In this case, since the load receiving member receives the load from the pallet, the pallet can be supported more reliably.

  According to the present invention, it is possible to prevent the pallet from being tilted when the pallet is lowered even when the pallet ascending position is lower than the predetermined position.

  Hereinafter, preferred embodiments of a pallet support device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an outline of a multi-story parking device to which a pallet support device according to an embodiment of the present invention is applied. As shown in the figure, the multi-story parking device 1 is provided in a pit P formed at a predetermined depth from a road surface G on which a vehicle enters and exits. The three-dimensional parking apparatus 1 includes a frame body 3, a pallet elevating body 11, an elevating drive mechanism (not shown), a pallet support device 21, and the like.

  The frame 3 is constituted by a front column 5 and a rear column 7 erected on the left and right sides of the pallet elevating body 11, and front and rear beams 9 laid between the top of the front column 5 and the top of the rear column 7. It is configured. A rectangular parallelepiped space surrounded by the front column 5 and the rear column 7 forms a space for the unit parking device, and the pallet lifting body 11 is arranged in the space.

  The pallet lifting / lowering body 11 includes an upper pallet 13, a middle pallet 15, and a lower pallet 17, and parking portions for storing vehicles are arranged in three stages in the vertical direction of the frame body 3. That is, in a state where the entire pallet lifting / lowering body 11 is stored in the pit P, the upper space of the upper pallet 13 becomes the upper parking portion, the upper space of the middle pallet 15 becomes the middle parking portion, and the upper pallet 17 The space is the lower parking area. These upper pallet 13, middle pallet 15, and lower pallet 17 are integrally connected by a pallet column 19. The pallet elevating body 11 can be displaced up and down by an elevating drive mechanism, and is moved up and down between a plurality of parking portions.

  The raising / lowering drive mechanism of the pallet raising / lowering body 11 is a well-known thing, and although detailed description is abbreviate | omitted, it is as follows, for example. The pallet lifting / lowering body 11 is supported by two front and rear roller chains spanned in the width direction on the lower surface of the lower pallet 17 so as to be movable up and down, and is disposed near the upper part of the rear support column 7 on one side with respect to the pallet lifting / lowering body 11. The chain sprocket mechanism is actuated by raising and lowering drive of the drive motor unit, and the inside of the pit P is raised and lowered.

  The pallet support device 21 is a device that prevents the pallets 15 and 17 from dropping from the stop position in each stage. As shown in FIG. 1, a total of four locations are provided on the front column 5 and the rear column 7 respectively. The pallet lifting body 11 is located on the front, rear, left and right as viewed from above. The pallet support device 21 supports the pallet when the pallet raised to the road surface G of the middle pallet 15 and the lower pallet 17 falls, and is stored in the pallet lifting body 11 and the pallet lifting body 11. Protect the vehicle.

  Next, the configuration of the pallet support device 21 will be described in more detail. FIG. 2 is a side view of the pallet support device 21, and FIG. 3 is a front view thereof. In FIG. 2, for convenience of explanation, a part of the base portion 23 (described later) is cut out to show the pallet support device 21.

  As shown in FIGS. 2 and 3, the pallet support device 21 has a base portion 23 fixed to the front column 5 or the rear column 7 with bolts and the like, and abuts against the pallet as the pallet moves up and down. A movable arm portion 31, a first spring member 41 and a second spring member 43 that urge the arm portion 31, a lever member 51 that can contact the arm portion 31, and a lever member 51 are swung. A solenoid (actuator) 61 and a load receiving member 71 are provided.

  The base part 23 has a base frame 25 and a fixing plate 27. The base frame 25 includes a base portion 25a and side portions 25b extending from the left and right ends of the base portion 25a, and has a substantially U-shaped cross section. The fixing plate 27 is a member for fixing the base portion 23 to the front column 5 or the rear column 7 and is integrally joined by welding or the like in a state of being laid between the end portions of the side portions 25b. The base 25a may be fixed to the front column 5 or the rear column 7.

  The arm portion 31 is pivotally supported by an arm shaft 33 provided between the side portions 25 b of the base frame 25, and can swing with respect to the frame body 3. The shape of the arm portion 31 is bowl-shaped so that it can swing smoothly as the pallet lifting body 11 is raised and lowered. Further, the tip of the arm part 31 has a rounded shape with a predetermined curvature.

  Further, a roller (friction reducing means) 32 is provided at the tip of the arm portion 31. The roller 32 is made of, for example, polyacetal, and the curvature of the roller 32 substantially matches the curvature of the tip of the arm portion 31. The roller 32 is pivotally supported on the tip of the arm 31 so that a part of the roller 32 protrudes slightly from the tip of the arm 31, and reduces friction when the pallet contacts the tip.

  As shown in FIG. 4, the first spring member 41 is a torsion coil spring. Both ends of the first spring member 41 are hooked on spring hook portions (not shown) provided on the side portions 25 b of the base frame 25. The first spring member 41 has an intermediate portion 41a that contacts the bottom surface of the arm portion 31, and a coil portion 41b formed between both ends and the intermediate portion 41a. The shaft 33 is inserted.

  The first spring member 41 applies an urging force that causes the arm portion 31 to swing upward when the intermediate portion 41 a contacts the bottom surface of the arm portion 31. The urging force of the first spring member 41 causes the arm portion 31 to return to a contact position where the arm section 31 can contact the pallet from a position that swings downward in a state where the arm section 31 does not contact the pallet. . In the present embodiment, the contact position is set at a position where the swing position of the arm portion 31 is substantially horizontal.

  Similar to the first spring member 41, the second spring member 43 is a torsion coil spring. Both ends of the second spring member 43 are hooked on spring hook portions (not shown) provided on the side portions 25b of the base frame 25. Further, the second spring member 43 has an intermediate portion 43a in which the tube 45 is extrapolated to contact the upper surface of the arm portion 31, and a coil portion 43b formed between both ends and the intermediate portion 43a. Thus, the shaft 47 is inserted into the coil portion 43b.

  The second spring member 43 applies an urging force that causes the arm portion 31 to swing downward when the intermediate portion 43 b contacts the upper surface of the arm portion 31. The urging force of the second spring member 43 causes the arm portion 31 to return to a contact position where the arm section 31 can contact the pallet from a position that swings upward in a state where the arm section 31 is not in contact with the pallet. .

  The first spring member 41 and the second spring member 43 cooperate with each other so that the position of the arm portion 31 is maintained at the contact position when the pallet is not in contact with the arm portion 31. Thus, an urging force is applied to the arm portion 31.

  Further, as shown in FIG. 3, inward pins 49 are respectively provided on the side portions 25 b of the base frame 25. When the first spring member 41 swings the arm portion 31 to the contact position, the pin 49 comes into contact with a portion of the first spring member 41 between the intermediate portion 41a and the coil portion 41b. The displacement of the first spring member 41 in the extending direction is restricted. Accordingly, when the arm portion 31 swings upward from the contact position, the arm portion 31 is separated from the intermediate portion 41a of the first spring member 41, and the contact state between the arm portion 31 and the first spring member 41 is changed. Canceled.

  The lever member 51 is pivotally supported by a shaft 55 installed between the side portions 25 b of the base frame 25, and is swingable with respect to the frame body 3 by an axis different from the arm portion 31. At the lower end of the lever member 51, a contact portion 53 capable of contacting the base end of the arm portion 31 is provided, and the upper end of the lever member 51 is connected to the plunger 62 of the solenoid 61.

  The lever member 51 swings in conjunction with the advancement / retraction of the plunger 62 of the solenoid 61, and the contact portion 53 contacts the arm portion 31 with the swing of the lever member 51, and the arm It swings between the retracted position where it does not contact the part 31. The contact portion 53 at the contact position contacts the upper surface of the base end of the arm portion 31 and restricts the arm portion 31 from swinging downward from the contact position. The contact portion 53 in the retracted position does not contact the upper surface of the base end of the arm portion 31 and allows the arm portion 31 to swing downward from the contact position.

  The solenoid 61 is a small electromagnetic solenoid having a drive power supply voltage of about DC24V. The solenoid 61 is screwed to the side portion 25b of the base frame 25 and controls the advance / retreat of the plunger 62 based on an output signal from a control unit (not shown).

  A limit switch 65 is provided on the side portion 25b of the base frame 25 via a bracket. The limit switch 65 is a switch that detects that the contact portion 53 is in the retracted position, that is, the restriction of the downward swing of the arm portion 31 is released. When the plunger 62 of the solenoid 61 is retracted, the limit switch 65 is turned on when the upper end of the lever member 51 comes into contact, and outputs a signal representing the state to the control unit.

  The load receiving member 71 is constructed between the side portions 25 b of the base frame 25. The load receiving member 71 is disposed so as to come into contact with the contact portion 53 when the contact portion 53 advances to a contact position where the contact portion 53 comes into contact with the arm portion 31. As a result, when the pallet hits the arm portion 31 in a state where swinging downward from the contact position is restricted by the contact portion 53, the load receiving member 71 moves from the pallet via the contact portion 53. It is designed to receive a load.

  Subsequently, the operation of the pallet support device 21 having the above-described configuration will be described.

  When the pallet lifting / lowering body 11 of the multi-story parking device 1 is raised, in the pallet support device 21, as shown in FIG. 5, the plunger 62 of the solenoid 61 is advanced to swing the lever member 51, and the contact portion 53 is the arm. It will be in the state located in the contact position which contacts the part 31. FIG. When the pallet rises in this state, the arm portion 31 abuts on the rising pallet and swings upward to pass the pallet.

  At this time, the second spring member 43 is displaced in the compression direction as the arm portion 31 swings. Further, the first spring member 41 abuts on the pin 49 and displacement in the extending direction is restricted, and the intermediate portion 41 a of the first spring member 41 is separated from the bottom surface of the arm portion 31. Thereby, the contact state between the first spring member 41 and the arm portion 31 is released.

  At the position where the arm portion 31 swings upward, a biasing force is applied to the arm portion 31 in a direction swinging downward by the second spring member 43. For this reason, when the pallet passes upward and does not come into contact with the arm portion 31, the arm portion 31 swings downward by the urging force from the second spring member 43 and can be brought into contact with the pallet. Return to.

  The arm portion 31 that has returned to the contact position again contacts the intermediate portion 41 a of the first spring member 41, and swings due to the balance between the biasing force of the first spring member 41 and the biasing force of the second spring member 43. The position is kept at the contact position. Further, when the upper surface of the base end of the arm portion 31 comes into contact with the contact portion 53, swinging downward from the contact position is restricted. Thereby, even if a pallet should fall, the arm part 31 supports the said pallet. The load when the dropped pallet hits is received by the load receiving member 71 via the arm portion 31 and the contact portion 53.

  On the other hand, when the pallet lifting / lowering body 11 of the three-dimensional parking apparatus 1 is lowered, the pallet support device 21 retracts the plunger 62 of the solenoid 61 to swing the lever member 51 as shown in FIG. Is in a retracted position where it does not contact the arm portion 31. Further, when the upper end of the lever member 51 comes into contact with the limit switch 65, it is detected on the control unit side that the restriction of the downward swing of the arm portion 31 is released, and the pallet lifting body 11 starts to descend. Is done. When the pallet is lowered in this state, the arm portion 31 comes into contact with the descending pallet and swings downward to pass the pallet.

  At this time, the first spring member 41 is displaced in the compression direction as the arm portion 31 swings. The second spring member 43 always abuts on the upper surface of the arm portion 31 and is displaced in the extension direction as the arm portion 31 swings. At the position where the arm portion 31 swings downward, a biasing force is applied to the arm portion 31 in a direction swinging upward by the first spring member 41. For this reason, when the pallet passes downward and does not contact the arm portion 31, the arm portion 31 swings upward by the urging force from the first spring member 41 and can contact the pallet. Return to.

  By the way, in the three-dimensional parking apparatus as described above, the pallet is lifted from a predetermined position due to, for example, a detection position shift of a sensor that detects the pallet lift position or an emergency stop during the pallet lift by operating the emergency stop button. May also be low. In the conventional pallet support device 101 in which the friction reducing means is not provided at the tip of the arm portion 102 when the pallet rises lower than a predetermined position and stops at a position not exceeding the position of the arm portion, FIG. As shown in FIG. 3, it is conceivable that the tip of the arm portion 102 is caught on the pallet, and the arm portion 102 stops without returning to the contact position. If the descent of the pallet is started in this state, the arm unit 102 does not swing downward, and the pallet that is still caught on the tip of the arm unit 102 may be tilted.

  On the other hand, in the pallet support device 21 according to the present embodiment, the roller 32 that substantially matches the curvature of the tip of the arm portion 31 is used as a friction reducing means for reducing the friction when the pallet is caught. It is provided at the tip. Therefore, even when the pallet rises lower than a predetermined position and stops with the tip of the arm portion 31 hooked on the pallet, as shown in FIG. Since the pallet and the tip of the arm part 31 are released by sliding against the roller 32, the pallet can be prevented from tilting.

  Further, in the pallet support device 21, by matching the curvature of the roller 32 with the curvature of the tip of the arm portion 31, the pallet is prevented from being caught on the roller 32 itself, and the pallet can smoothly slide from the tip of the arm portion 31. ing. Further, by selecting polyacetal as the material of the roller 32, the weather resistance and durability of the roller 32 are ensured.

  In the pallet support device 21, the arm portion 31 swings as the pallet moves up and down, and the first spring member 41 and the second spring member 43 using torsion coil springs swing the arm portion 31. Is returned to the contact position where it can contact the pallet. Therefore, a solenoid or the like for swinging the arm portion 31 is not required, and the size can be easily reduced at low cost. The solenoid 61 in the pallet support device 21 only needs to have a driving force that can swing the lever member 51, and can be a small and low power supply voltage, which is advantageous in terms of safety measures against electric shock. It becomes.

  Further, in the pallet support device 21, the first spring member 41 abuts against the arm portion 31 to apply a biasing force, and when the arm portion 31 swings upward from the abutment position, the first spring member 41 The contact state between the spring member 41 and the arm portion 31 is released. As a result, when the arm portion 31 swings upward from the contact position, a force is prevented from acting on the first spring member 41 in the extending direction, and the reliability of the first spring member 41 is improved. it can. Further, it is not necessary to fix the first spring member 41 to the arm portion 31, and the first spring member 41 can be easily assembled.

  In the pallet support device 21, the lever member 51 having the contact portion 53 that contacts the arm portion 31 and restricts the downward swing of the arm portion 31, and the contact portion 53 when the pallet is lowered. The pallet hits the solenoid 61 that swings the lever member 51 so that the restriction of the downward swing of the arm part 31 is released, and the arm part 31 that is controlled to swing downward at the contact position. And a load receiving member 71 that contacts the lever member 51 and receives a load from the pallet to constitute a swing restricting means. With such a configuration, a configuration for restricting the downward swing of the arm portion 31 can be realized easily and at low cost. Further, since the load receiving member 71 receives a load from the pallet, the dropped pallet can be firmly supported.

  The present invention is not limited to the above embodiment. For example, the three-dimensional parking device to which the pallet support device 21 is applied is not limited to the pit type three-dimensional parking device, and may be a type of three-dimensional parking device in which the pallet traverses and moves up and down. In addition, as the first spring member 41 and the second spring member, a tension spring may be used instead of the torsion coil spring. With respect to the second spring member 43, when the second spring member 43 abuts against the arm portion 31 to apply a biasing force and the arm portion 31 swings upward from the abutment position, the second spring member 43 43 and the arm portion 31 may be released from the contact state.

It is a figure which shows the outline | summary of the multi-story parking apparatus to which the pallet support apparatus which concerns on one Embodiment of this invention is applied. It is a side view of the pallet support apparatus shown in FIG. It is a front view of the pallet support apparatus shown in FIG. It is a disassembled perspective view which shows the relationship between an arm part, a 1st spring member, and a 2nd spring member. It is a figure which shows operation | movement of the pallet support apparatus at the time of a pallet raising. It is a figure which shows operation | movement of the pallet support apparatus at the time of pallet lowering. It is a figure which shows operation | movement when the raise position of a pallet becomes lower than the normal stop position in the conventional pallet support apparatus. It is a figure which shows operation | movement when the raise position of a pallet becomes lower than a normal stop position in the pallet support apparatus which concerns on this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Three-dimensional parking apparatus, 11 ... Pallet raising / lowering body, 13 ... Upper pallet, 15 ... Middle pallet, 17 ... Lower pallet, 21 ... Pallet support apparatus, 31 ... Arm part, 32 ... Roller (friction reduction means), 41 ... 1st DESCRIPTION OF SYMBOLS 1 spring member, 43 ... 2nd spring member, 51 ... Lever member, 53 ... Contact part, 61 ... Solenoid (actuator), 71 ... Load receiving member.

Claims (9)

A pallet support device that is provided in a three-dimensional parking device provided with a pallet that is raised and lowered between a plurality of parking portions arranged in a vertical direction, and prevents the pallet from dropping from a stop position in each step,
As the pallet moves up and down, an arm portion that comes into contact with the pallet and can swing up and down,
Arm position return means for returning the arm portion to a contact position capable of contacting the pallet when the pallet stops contacting the arm portion;
Rocking restricting means for restricting the arm portion returned to the contact position from swinging downward, and
The pallet support device is characterized in that a friction reducing means for reducing friction when the pallet comes into contact is provided at the tip of the arm portion.   The pallet support device according to claim 1, wherein the friction reducing means is a roller that is pivotally supported at the tip of the arm portion.   The pallet support device according to claim 2, wherein a tip of the arm portion is rounded, and a curvature of the roller substantially matches a curvature of the tip.   4. The pallet support device according to claim 2, wherein the roller is made of polyacetal. The arm position return means is
A first spring member that biases the arm portion so that the arm portion returns to the contact position from a position where the arm portion swings downward;
5. A second spring member that biases the arm portion so that the arm portion returns to the contact position from a position where the arm portion swings upward. 5. A pallet support device according to claim 1.   The first spring member is in contact with the arm portion and biases the arm portion, and when the arm portion swings upward from the contact position, the contact state with the arm portion is 6. The pallet support device according to claim 5, wherein the pallet support device is released.   The pallet support device according to claim 5 or 6, wherein the first spring member and the second spring member are torsion coil springs. The swing restricting means is
A lever member having an abutting portion that abuts on the arm portion and restricts downward swinging of the arm portion;
And an actuator that swings the lever member so that the restriction of the downward swing of the arm portion by the contact portion is released when the pallet is lowered. Item 8. The pallet support device according to any one of Items 1 to 7.   The swing restricting means further includes a load receiving member that receives a load from the pallet when the pallet hits the arm portion in a state where swinging downward is restricted at the contact position. The pallet support device according to any one of claims 1 to 8.

Images