JPH0620309U - Heavy goods carrier - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the lifting table 4 is large and extremely heavy, its height is so large that the heavy object W can be accurately and safely delivered to a machine tool or the like. The positioning accuracy in the direction should be improved. [Structure] A contact member 10 facing downward with respect to the lifting table 4
With respect to the trolley 2, the stoppers 21 and 30 are provided at the upper side set height and the lower side set height at which the lift 4 should be stopped. Contact member 10
And stopper 21 or hitting member 27 and stopper 30
If and touch, the lowering of the lift 4 is physically blocked,
Make sure to stop.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heavy goods transport vehicle.

[0002]

[Background of Prior Art]

 Conventionally, the following techniques are known. In other words, this is a technology that allows the workpiece to be transported by an automated guided vehicle or the like between the installation location of the machine tool and the stock area of the workpiece as appropriate. Generally, in stock areas, workpieces are distributed and stored in a rack device that has a plurality of upper, lower, left and right article storage shelves.Therefore, as an automated guided vehicle, an elevator with an article transfer device is used. A stacker crane that was able to move up and down along the mast was used. The work piece is usually handled while being fixed to a pallet that also serves as a jig that serves as a pressing tool during processing. By the way, the above-mentioned transfer technology and lifting technology can be applied to large-scale products (together referred to as heavy products below) whose total weight of the work piece and pallet reaches several tons to several tens of tons. As a matter of course, it is impossible to use a normal-sized stacker crane, and the carrier and the lifting platform will be relatively large and extremely heavy.

[0003]

[The purpose of the device]

 As described above, with a large and extremely heavy lift (additionally heavy objects), the inertia associated with its ascent and descent increases, making it difficult to increase the stop positioning accuracy in the height direction. This invention can improve the positioning accuracy so that heavy objects can be delivered accurately and safely to a machine tool or a stock field of work pieces or a delivery device for them. The purpose is to provide a heavy goods transportation vehicle.

[0004]

[Means for achieving the above object]

 This invention adopts the following means in order to achieve the above object. That is, it has a trolley that can travel along rails, a lift that can be raised and lowered along a mast that is erected on the trolley, and a heavy object delivery device that is provided on the lift. The hitting member is provided downward, the carriage is provided with a stopper that comes into contact with the hitting member at a predetermined stop height of the lifting platform, and a height adjusting mechanism is provided on at least one of the hitting member and the stopper. It is a thing.

[0005]

[Function of the device]

 This device has the following actions. In the process of lowering the elevator, if the downward contact member provided on the elevator comes into contact with the stopper provided on the carriage, the elevator is physically prevented from descending and further descends. Never. Therefore, the stop position in the height direction of the lifting table becomes reliable depending on the position where the stopper is provided with respect to the carriage.

[0006]

【Example】

 The present invention will be described below based on an embodiment shown in the drawings. As shown in FIG. 1, the heavy goods transport vehicle 1 is provided with a carriage 2 that can travel along a rail 20 and a lift provided between the two masts 3 and 3 standing on the carriage 2. The platform 4 and a delivery device 5 for the heavy object W provided on the lifting platform 4 are provided. Then, the lifting table 4 is suspended by the steel rope members 8, 8 at both ends thereof, and is driven up and down by the drive from the winding drum 18.

The elevating table 4 in FIG. 1 shows a state in which it is stopped at a height set on the upper side of its elevating stroke. Such a state corresponds to, for example, a case where the heavy load W on the lift 4 is stored in the upper shelf (not shown) in the stock area. At this time, the hitting members 10, 10 provided on the lower surfaces of both ends of the lift 4 and the stoppers 21, 21 provided near the masts 3, 3 of the carriage 2 come into contact with each other.

As shown in FIG. 2, the contact member 10 includes a mounting body 11 mounted on the lifting table 4, an up-and-down moving piece 13 having a contact surface 13a that abuts against the stopper 21 (see FIG. 1), and both of them. And a wedge member 12 provided therebetween. The wedge member 12 is screw-fitted to a height adjusting bolt 14 rotatably held by the hanging piece 11 a of the mounting body 11. Further, as shown in FIG. 3, the mounting body 11 and the vertically movable piece 13 are held together by neck length bolts 15 and 15, and to a certain extent by a plurality of disc springs 16 inserted into the neck portions of the bolts 15 and 15. Energized and held so that it can be separated. Therefore, when the height adjusting bolt 14 is rotated, the wedge member 12 comes to slide between the mounting main body 11 and the vertical moving piece 13 while being in contact with both of them, and as a result, the vertical movement with respect to the mounting main body 11 is increased. The height of the moving piece 13 can be adjusted. This structure serves as a height adjusting mechanism for stopping the lifting table 4 at the upper set height. As shown in FIG. 5, the hitting members 10 formed in this manner are also arranged on both sides of the lifting table 4, and there are four hitting members in total.

As shown in FIG. 4, the stopper 21 is in the shape of a square bar, and can be slid forward and backward by a motor 22, a ball screw 23, and a nut 24. Therefore, only when necessary, the elevator table 4 (abutting member 10) slides forwards and backwards to the vertical region, and otherwise slides back and forth. As is apparent from FIGS. 1 and 5, the stoppers 21 are arranged in the same number and in the same position, corresponding to the contact members 10 of the lift 4.

As shown by the chain double-dashed line in FIG. 5, when the lifting table 4 is stopped at the lower side set height in the lifting stroke, it is provided so as to project to both sides of the lifting table 4. The contact members 27, 27 and the stoppers 30, 30 provided on the upper surface of the carriage 2 are in contact with each other. In addition, such a state corresponds to, for example, a case where the heavy object W on the lifting table 4 is delivered to a lower shelf portion of the stock place or a machine tool or the like (neither is shown).

The hitting member 27 is extended to both sides of the lifting table 4 at a lower set height of the lifting table 4 so that the lifting table 4 fits into the carriage 2. To make it happen. As shown in FIGS. 1 and 5, a total of four contact members 27 are arranged at both ends and both sides of the lifting table 4, and the stoppers 30 are also arranged in the same position with respect to the carriage 2. ing.

As shown in FIG. 6, the stopper 30 includes a mounting main body 31 mounted on the carriage 2, a vertical movement piece 33 having a contact surface 33 a that contacts the contact member 27 (see FIG. 5), and both of them. And a wedge member 32 provided therebetween. The wedge member 32 is screwed onto a height adjusting bolt 34 rotatably held by the upright piece portion 31 a of the mounting body 31. Further, the mounting body 31 and the vertically movable piece 33 are tied together by neck length bolts 35, 35 so as not to separate from each other by a predetermined distance or more (see FIG. 7). Therefore, when the height adjusting bolt 34 is rotated, the wedge member 32 comes to slide between the mounting body 31 and the upper and lower moving pieces 33 while being in contact with both, and as a result, the mounting body 31 is moved. The height of the vertical moving piece 33 can be adjusted with respect to. This structure serves as a height adjusting mechanism for stopping the lift 4 at the lower set height.

By the way, the delivery device 5 provided on the lifting table 4 includes three heavy load bearing rails 6, 6, 6 provided in a direction perpendicular to the paper surface of FIG. 1, and a lower part of the heavy load W. And a slide fork 7 arranged so that The slide fork 7 is provided with an intermediate fork and an upper fork slidably on a base fork, and can be vertically moved by an elevating mechanism (not shown) as appropriate. Further, a projection (not shown) is provided on the upper surface of the upper fork, and when the slide fork 7 is raised, this projection is just fitted into a recess (not shown) provided on the bottom surface of the pallet P 1 of the heavy object W. It is designed to fit in. Therefore, the heavy load W is appropriately delivered to and from a machine tool (not shown) by reciprocating sliding by the slide fork 7 in this state.

[0014]

[Operation of the Embodiment] In order to stop the lifting table 4 at the upper setting height as shown in FIG. 1, first, the stopper 21 is left in the retracted state, and the lifting table 4 is once moved up and down. Raise to the highest position. Then, after the stopper 21 is slid forward, the lifting table 4 is slowly lowered. The drive of the winding drum 18 is stopped when the contact member 10 of the lifting table 4 contacts the stopper 21. On the other hand, in order to stop the elevating table 4 in this state at the lower set height, the elevating table 4 is slightly raised to separate the contact member 10 from the stopper 21 and the stopper 21 is retracted. After sliding, the elevating table 4 is lowered until the hitting member 27 contacts the stopper 30. It should be noted that it is advisable to detect the approaching of both by appropriate means and slow down the descending speed in advance. The drive of the winding drum 18 is stopped at the time when the two come into contact with each other.

[0015]

[Effect of device]

 The present invention has the following effects due to the above-described configuration. Even if the lifting platform becomes large and extremely heavy, the positioning accuracy in the height direction can be increased to such an extent that the heavy object can be delivered to the machine tool or the like accurately and safely.

[Brief description of drawings]

FIG. 1 is a side view showing a heavy goods carrier according to the present invention.

FIG. 2 is an enlarged side cross-sectional view showing a hitting member for stopping at a height set on the upper side of the lift table.

FIG. 3 is a front sectional view taken along line II-II of FIG.

FIG. 4 is an enlarged side view showing a part of a stopper for stopping at a height set on an upper side of a dolly by cutting out the stopper.

5 is an enlarged front view taken along the line III-III in FIG.

FIG. 6 is an enlarged side cross-sectional view showing a stopper for stopping at a lower set height of the carriage.

7 is a cross-sectional view taken along the line IV-IV of FIG.

[Explanation of symbols]

 1 Heavy goods transport vehicle 2 Truck 3 Mast 4 Lifting platform 5 Delivery device 10 Abutment member (for stopping at the upper set height) 21 Stopper (for stopping at the upper set height) 27 Abutting member (lower side) Stopper at the set height) 30 Stopper (Stopper at the lower set height)

Claims (2)

[Scope of utility model registration request] 1. A hoist having a carriage that can travel along a rail, a lift that can lift up and down along a mast that is erected on the carriage, and a heavy object delivery device provided on the lift. The table is provided with a hitting member facing downward, the carriage is provided with a stopper that comes into contact with the hitting member at a predetermined stop height of the lifting platform, and at least one of the hitting member or the stopper is provided with a height adjusting mechanism. A heavy goods carrier. 2. The height adjusting mechanism, a mounting main body portion for a lift, a mast, etc., a vertical moving piece having a contact surface,
2. The heavy goods transport vehicle according to claim 1, further comprising: a wedge member which is slidably adjustable between the mounting body and the vertically movable piece while being in contact with both of them.