JP3101752B2 - Pallet holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet holding device, and more particularly to a pallet holding device for holding a pallet on a hanging member such as a chain or a rope for vertically transferring a pallet on which a vehicle is mounted.

[0002]

2. Description of the Related Art Conventionally, for example, in a multi-story parking facility,
An elevating device is provided for transferring a pallet on which a vehicle is mounted between a parking room having different heights and a parking room. The elevating device includes a pair of endless chains that are wound around a pair of sprockets provided at a predetermined interval apart from each other in a vertical direction and circulate and move on a vertical surface, and the pair of endless chains are connected to the pair of endless chains. There is a known pallet provided between endless chains to lift and lower the pallet.

[0003] The lifting device is usually provided with a pallet holding device for holding a pallet on each of a pair of endless chains. As shown in FIG.
The pallet holding device 101 includes an attachment 105 provided on the endless chain 103 so as to protrude outward, and a pallet is provided on an upper surface of the attachment 105 protruding horizontally in a vertically moving portion of the endless chain 103. The pallet 107 is transported while being placed and supported, and the pallet 107 is delivered to a loading / unloading room or a parking section after the transport is completed.

The pallet 10 is attached to the attachment 105.
7, a guide pin 111 is provided to be inserted into an engagement hole 109 provided on the lower surface of the pallet 7, and the pallet 107 is positioned by the engagement hole 109 and the guide pin 111.
Thus, the accuracy of holding the predetermined pallet 107 is ensured. The endless chain 103 includes a pair of left and right brim members 11.
A pair of upper and lower rollers 117 provided on the attachment 105 run along the guide rail 115.

[0005]

As shown in FIG. 8, in the pallet holding device 101, a pallet 107 is provided.
Are simply placed and supported by the attachments 105 on both sides of the pallet 107, so that the pallet 107 and the attachment 105 are separated from each other.
Subject to bending action due to the load of the vehicle above. Attachment 105 has one end supported by endless chain 103, and receives the load of the vehicle via pallet 107 at the other end. A bending moment acts on one end of the attachment 105, and the bending moment causes the pair of rollers 117 to rotate clockwise to press the brim members 113 on the left and right sides of the guide rail 115, respectively. The guide rail 115 generates reaction forces r and r with respect to the pressing force due to the bending moment. For this reason, the guide rail 115 needs to support not only the vertical movement of the attachment 105 but also the attachment 105 from both the left and right sides, and the guide rail 115 must have a strong structure that can withstand the force received from the pair of rollers 117. There was a problem.

In addition, positioning by the engagement hole 109 and the guide pin 111 has a problem that positioning cannot be performed accurately because the holding precision of the pallet 107 is low.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is intended to prevent a bending moment by a vehicle mounted on a pallet from acting on a hanging member (endless chain) and to hold the pallet per one place. The aim is to increase the accuracy.

[0008]

In order to achieve the above object, the present invention provides a concave portion on one of a lower surface of a pallet and an upper surface of an attachment, and a convex portion on the other. The pallet and the attachment are detachably fitted so as to be integrated like a beam.

More specifically, a solution taken by the invention according to claim 1 is a pair of vertically-moving hanging members provided to extend in a vertical direction at a predetermined interval, and a pair of vertically-moving hanging members. A pair of attachments protruded inward so as to face each other, and provided rotatably with respect to the pair of hanging members, and a concave or convex portion provided on the upper surface of the pair of attachments, The concave portion or the convex portion is detachably fitted without any gap at least two positions opposite to the convex portion or the concave portion of the lower surface of the pallet arranged and held between the pair of hanging members,
The pallet and the attachment are integrated like a beam.

According to a second aspect of the present invention, there is provided a pallet holding device according to the first aspect, wherein the recess is formed so that the recess expands from the bottom surface toward the opening. The projections are formed so that the projections become thinner from the base to the tip in accordance with the shape of the recesses.

[0011]

According to the first aspect of the present invention,
A concave portion is provided on one of the lower surface of the pallet and the upper surface of the attachment, and a convex portion is provided on the other, and the concave portion and the convex portion are detachably fitted with a pallet at least at two locations opposite to each other with no gap therebetween. The attachment is integrated like a beam. In addition, since each of the attachments is rotatably supported by the hanging member, the pallet and each of the attachments function as a double-supporting beam in which both ends can freely rotate. Therefore, the bending moment due to the load of the vehicle does not act on the support points of the attachments corresponding to both ends of the beam.

In addition, since the positioning by the concave and convex fitting is higher in accuracy than the positioning by the conventional engaging hole and the guide pin, the pallet holding accuracy per one place is improved.

Further, in the invention according to claim 2, the concave portion is formed so that the concave portion expands from the bottom surface to the opening, while the convex portion has a base portion corresponding to the shape of the concave portion. Since it is formed so as to become thinner from the tip to the tip, it is easy to attach and detach the convex portion to the concave portion.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a lifting and lowering device to which a pallet holding device according to one embodiment of the present invention is applied, and FIG. 2 is an enlarged view of a main portion near the pallet holding device in the lifting and lowering device.
FIG. 3 shows a plan view of FIG. As shown in FIGS. 1 to 3, the elevating device 1 includes endless chains 3, 3 as hanging members in a pair of right and left pairs at right and left sides at predetermined intervals. Each of the pair of endless chains 3 in the front and rear two rows is wound around a pair of sprockets 5, 5,... Provided vertically separated from each other and circulates in a vertical plane. A pallet 9 for mounting the vehicle 7 is provided between the pair of endless chains 3 in the front and rear two rows.

The pallet 9 is placed in front and rear 2
A pallet holding device 11 for holding the pair of endless chains 3 in a row is provided. The pallet holding device 11
Each of the endless chains 3 is provided with a plurality of attachments 15, 15,... Protruding inward so as to face each other and provided rotatably with respect to the endless chains 3 by connecting pins 13a, 13b. Each of the pair of attachments 15 protrudes toward the pallet 9 in a vertically moving portion of the endless chain 3 that extends in the up-down direction. In this protruding state, four attachments 15 are provided at the front, rear, left, and right of the lower surface of the pallet 9. Are placed on each other. And the lifting device 1
The vertical movement portion of the endless chain 3 is configured to move up and down while holding the pallet 9 horizontally and moving up and down.

As shown in FIGS. 4 and 5, at the base of each attachment 15, two pairs of upper and lower rollers 19, 19, which are pivotally supported by connecting pins 13a, 13b, are provided. The pair of rollers 19 run while being guided by guide rails 21 extending vertically along the endless chain 3. Attachment 1
A concave portion 23 is provided on the upper surface of the front end of the front end 5 between the front and rear ends.

The pallet holding device 11 has a projection 25 provided on the leg 17 of the pallet 9 so as to face the recess 23 in the vertical direction. The projection 25
The pallet 9 and the attachment 15 are configured so as to be detachably fitted to the concave portion 23 without any gap so as to be integrated with each other like a beam at two places opposite to each other.

The concave portion 23 of the attachment 15 has a concave side vertical surface 27 formed on the left side surface of FIG.
The recessed side inclined surface 2 formed on the right side surface of FIG. 4 and inclined so that the recessed portion 23 expands from the bottom surface toward the opening.
9 are provided.

On the other hand, the projection 25 has a projection-side vertical surface 3 formed on the left side surface of FIG.
1 and the concave side inclined surface 29 formed on the right side surface of FIG.
And a convex-side inclined surface 33 that is formed at the same inclination angle θ as the concave-side inclined surface 29 and is provided. As a whole, the convex portion 25 is formed so as to become thinner from the base to the tip. ing.

Next, the function of holding the pallet 9 on which the vehicle 7 is mounted in the pallet holding device 11 will be described.

When the pair of attachments 15 of the pallet holding device 11 and the pallet 9 are brought close to each other, the concave portions 23 of the pair of attachments 15 in the front and rear two rows are fitted with the four projections 25 of the pallet 9, respectively. 9 and the attachment 15 are integrated like a beam. Further, each of the attachments 15 suspended on the endless chain 3 is rotatable around the upper connecting pin 13a, and a portion of the endless chain 3 below the attachment 15 is in a relaxed state, and the attachment 15 The attachment 15 can freely rotate with respect to the endless chain 3 because the rotation of the endless chain 3 is not hindered. Therefore, the pallet 9 and each of the attachments 15 are like two supporting beams that are pin-joined so that both ends can freely rotate. The bending moment due to the load of the vehicle 7 does not act on the support points S, S (see FIG. 6) of the attachments 15 corresponding to both ends of the beam by the endless chain 3.

A specific description will be given with reference to FIG. FIG.
In the above, the bending moment is positive when the beam is bent upward and negative when it is opposite. As shown in FIG. 6A, the load 2W of the vehicle 7 acts intensively at the center of the beam in order to simplify the action of the bending moment. In the case of a double-supported beam that is pin-joined so that both ends can freely rotate, the supporting reaction forces P, P at the support points S at both ends of the beam are half of the load 2W of the vehicle 7, while the bending moment is 0. Becomes Further, a bending moment M having a magnitude of -Wg acts on the concave / convex fitting position located at a distance g from the left support point S. The bending moment acting on the pallet 9 and the attachments 15 on both sides thereof is as shown in FIG.

The bending moment M having a magnitude of -Wg acting on the concave / convex fitting position acts so that the concave portion 23 and the convex portion 25 are firmly fitted. As shown in FIG. 7, the bending moment M is obtained by dividing the concave portion 23 and the convex portion 25 with the vertical height h.
Are contacted at two different contact points a, a. Due to the bending moment M, forces of opposite directions and equal magnitudes R act on the pallet 9 at two contact points a, while the attachment 15 is applied to the pallet 9 at the two contact points a, although not shown. A reaction force -R having the same magnitude as that of the acting force R in the opposite direction acts thereon. In FIG. 7,
The directions of the two forces acting on the pallet 9 at the two contact points a are respectively distributed in the horizontal direction, but one of countless possible directions of the force is illustrated.

Then, the pallet 9 is subjected to R × by a bending moment M having a magnitude of −Wg (see FIG. 6B).
The moment of h (see FIG. 7) acts. Therefore,
The legs 17 of the pallet 9 and the distal ends of the attachments 15 have sufficient strength to withstand a bending moment M of -Wg.

Also, the concave side vertical surface 2 of the concave side inclined surface 29
7, the larger the angle, the more the concave portion 23
And the protrusion 25 is easily attached and detached, while the distance h between the two contact points a is reduced and the force R acting on the pallet 9 is increased. The predetermined value is set in proportion to the increase in the force R.

According to this embodiment, the pair of attachments 15 are provided rotatably with respect to the endless chain 3 and the recesses 2 provided in the pair of attachments 15.
3 and the projection 25 provided on the pallet 9 are fitted to each other, so that the pallet 9 and each of the attachments 15 are like two support beams that are pin-joined so that both ends can freely rotate. The bending moment can be prevented from acting on the support point S of the attachment 15. Accordingly, a large bending moment M from the vehicle 7 does not act on the guide rail 21 via the attachment 15, and the guide rail 21 can have a relatively small strength enough to guide the attachment 15.

Further, since the pallet 9 and the pair of attachments 15 are integrated by fitting the concave portions 23 and the convex portions 25, the positioning accuracy is significantly improved as compared with the conventional positioning using the engaging holes and the guide pins. However, a predetermined positioning accuracy can be obtained only by fitting the concave and convex portions.

Since the concave portion 23 is formed so as to expand from the bottom surface toward the opening by the concave side inclined surface 29 and the convex portion 25 is formed to be tapered by the convex inclined surface 33, the concave portion is formed. Convex part 2 for 23
5 can be easily attached and detached.

Incidentally, the concave portions and the convex portions according to the present invention may be provided on the pallet 9 and the attachment 15, respectively, contrary to the above embodiment.

[0031]

As described above, according to the first aspect of the present invention, the pallet and the attachment are integrated as a beam by fitting the recess and the projection, and each attachment is suspended. Pallet and each attachment can function as a double-supported beam with both ends freely rotating, and a bending moment acts on the attachment support point. Can not be. Accordingly, when a guide rail for guiding the attachment is provided, a large bending moment from the vehicle can be prevented from acting on the guide rail via the attachment, and the guide rail is relatively large enough to guide the attachment. It can be stopped at low strength.

Further, since the pallet and the attachment are integrated by fitting the concave portion and the convex portion, the positioning accuracy is remarkably improved as compared with the conventional positioning using the engaging hole and the guide pin.

According to the second aspect of the present invention, the concave portion is formed so that the concave portion expands from the bottom surface to the opening, while the convex portion corresponds to the shape of the concave portion. The projection is formed so as to be narrower from the base to the tip, so that the projection can be easily attached to and detached from the recess.

[Brief description of the drawings]

FIG. 1 is a front view of a lifting device to which a pallet holding device according to one embodiment of the present invention is applied.

FIG. 2 is an enlarged front view of a main part near the pallet holding device in the elevating device.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a front view of the pallet holding device.

FIG. 5 is a plan view of FIG. 4;

6A is a diagram showing a load applied to the pallet holding device, and FIG. 6B is a diagram showing a bending moment.

FIG. 7 is a diagram showing a concave portion of the attachment and a convex portion of the pallet, in which a bending moment acts.

FIG. 8 is a front view of a conventional pallet holding device.

[Explanation of symbols]

 Reference Signs List 3 endless chain (hanging member) 7 vehicle 9 pallet 11 pallet holding device 15 attachment 23 concave portion 25 convex portion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 50-104364 (JP, U) Japanese Utility Model Sho 61-173430 (JP, U) Japanese Utility Model Sho 62-29324 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) E04H 6/18 B65G 1/04 B65G 1/06 B65G 17/26

Claims (2)

(57) [Claims] 1. A pair of hanging members up and down movement is provided so as to extend vertically at predetermined intervals, so as to face each other in each of the upper Symbol pair of hanging members
To protrude inwardly, and a pair of attachment provided so as to be rotatable with respect to the pair of hanging members, the recess provided in the upper surface of the upper Symbol pair of attachment or
And a convex portion, the concave or convex portion is disposed between the pair of hanging members
At least a convex or concave part on the lower surface of the pallet
Can be detachably fitted without gaps at two opposite sides
And, and the pallet and the attachment pallet holding apparatus characterized by being integral as beams. Wherein one said recess is formed so as to extend in accordance recess goes from the bottom to the opening, to the convex portion convex portion goes to the tip from the base to correspond to the shape of the recess The pallet holding device according to claim 1, wherein the pallet holding device is formed so as to be thin.