CN213621716U - Lifting, unloading, storing and transporting integrated transporting device - Google Patents

Abstract

The utility model discloses a lifting, unloading, storing and transporting integrated transporting device, which comprises a frame body, a transporting unit and a lifting and unloading unit; the frame body comprises a frame and at least one plane frame layer, and the plane frame layer is horizontally arranged in the frame and is fixedly connected with the frame; a group of transportation units are arranged on each layer of the plane frame, and a group of hoisting and unloading units are arranged on the frame corresponding to the group of transportation units; the transport unit comprises a first motor and a synchronous belt assembly; the lifting and unloading unit comprises a rotating assembly, a lifting assembly and a lifting hook assembly. The transportation device can accurately grab, transport and store and unload a plurality of containers of goods at the same time, and can independently complete all actions such as grabbing, transporting and unloading in a narrow working environment without manual assistance, and the transportation device is flexible in action and high in working efficiency.

Description

Lifting, unloading, storing and transporting integrated transporting device

Technical Field

The utility model belongs to the technical field of the freight relates to industry haulage vehicle, concretely relates to hang and unload warehousing and transportation integration conveyer.

Background

The crane refers to a multi-action crane for vertically lifting and horizontally carrying heavy objects within a certain range. With the high-speed development of economy in China, the crane occupies an increasingly important position in the development of social economy, and particularly, the function of a small crane is increasingly important in various factories and even family life. The selection of a proper small crane can greatly liberate productivity and improve production efficiency, so that the performance of the small crane is optimized, and the improvement of the flexibility and the reliability of the small crane has great practical significance for social production.

Small-size hoist equipment of market is generally fork truck, lift and small-size tower crane etc. at present, but these equipment have very big not enough and shortcoming: although the forklift is flexible and convenient, only one box of goods can be transported at a time, if a plurality of boxes of goods need to be transported, a lot of time needs to be consumed in a reciprocating mode, and the forklift can only grab and unload the goods through the forks at the front part of the forklift body, and if the forklift is in a narrow working site, the forklift is not easy to turn or turn around, so that unloading is impossible or other equipment or manual assistance is needed, and the workload and the working time are greatly increased; the elevator can simultaneously lift a plurality of boxes of goods with certain weight, and is convenient to transport, but the elevator is lack of a gripping device and an unloading device, needs manual work or other equipment to assist the gripping and unloading, is inconvenient to operate, and can increase the transport cost due to the increase of workload and working equipment; the tower crane is simple to operate and flexible in reaction, only one box of goods can be hoisted at a time, the lifting hook is easy to shake in the working process due to the height and the flexible connection, the requirement on the alignment accuracy of the lifting hook and the goods is high, the transportation accuracy is poor, much time is wasted when the goods are hoisted and unloaded, the tower crane is not easy to rotate or can rotate only by increasing the height of a tower body in a narrow working environment, the occupied space is large, the use is inconvenient, and the working efficiency is low.

In conclusion, although general small-sized hoisting equipment such as a forklift, a lifter, a small-sized tower crane and the like have advantages, the defects that the precision and the efficiency of goods handling are not high, the grabbing and unloading time is too long, all action processes cannot be independently completed in a narrow working environment and the like exist, and therefore the development of the small-sized transport vehicle which is suitable for the narrow working environment, accurate in grabbing and high in transport efficiency is significant to the goods transportation in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, a hang and unload warehousing and transportation integration conveyer is provided, this conveyer can accurately snatch simultaneously, transport and store up, unload many casees goods, and can independently accomplish all actions such as snatching, transporting, uninstallation in narrow operational environment, need not artifical supplementary, the action is nimble, and work efficiency is high.

In order to achieve the purpose, the utility model provides a lifting, unloading, storing and transporting integrated transporter, which comprises a frame body, a transporting unit and a lifting and unloading unit;

the frame body comprises a frame and at least one plane frame layer, the plane frame layer is horizontally arranged in the frame and is fixedly connected with the frame, and a plurality of wheels are arranged on the plane frame layer on the bottommost layer; a group of transportation units are arranged on each layer of the plane frame, and a group of hoisting units and a group of fork unloading units are arranged on the frame corresponding to the group of transportation units;

the transportation unit comprises a first motor and a synchronous belt component, the first motor and the synchronous belt component are both arranged on the plane frame layer, and an output shaft of the first motor is connected with the synchronous belt component;

the lifting and unloading unit comprises a rotating assembly, a lifting assembly and a lifting hook assembly, the rotating assembly is mounted on the frame and is positioned above the starting end of the synchronous belt assembly, the rotating output end of the rotating assembly is fixedly connected with the lifting assembly to drive the lifting assembly to rotate, and the lifting end of the lifting assembly is fixedly connected with the lifting hook assembly to drive the lifting hook assembly to lift;

the lifting assembly of the lifting and unloading unit controls the lifting hook assembly to lift and take the goods, the rotating assembly controls the lifting assembly to rotate and place the goods on the synchronous belt assembly of the corresponding transportation unit, the synchronous belt assembly stores and transports the goods, and the goods are transported to the designated position and unloaded.

The lifting, unloading, storing and transporting integrated transporting device has the advantages that the synchronous belt component is used for conveying and transporting goods, and multiple groups (boxes) of goods can be placed on the synchronous belt, so that multiple groups of goods can be transported simultaneously, and the transporting efficiency is improved. The synchronous belt component can be composed of a conventional synchronous belt, a rotating shaft, a belt wheel, a motor and the like. In the utility model, the synchronous belt component preferably comprises a synchronous belt, a driving belt wheel, a driven belt wheel, a driving shaft and a driven shaft, the driving belt wheel is sleeved on the driving shaft and is fixedly connected with the driving shaft, one end part of the driving shaft is rotatably connected with one side edge of the plane frame layer, and the other end part of the driving shaft is fixedly connected with an output shaft of the first motor; the driven shaft is sleeved on the driven shaft and fixedly connected with the driven shaft, and the end parts of the two ends of the driven shaft are rotatably connected with the other side edge of the plane frame layer; the end parts of the two ends of the synchronous belt are respectively sleeved on the driving belt wheel and the driven belt wheel. On the basis of satisfying the loading transportation goods, the quantity, the size and the driving pulley, the driven pulley, driving shaft and the driven shaft that match with the hold-in range of hold-in range can carry out conventional selection according to actual conditions. Furthermore, the number of the synchronous belts is preferably two, and the friction force between the goods (box) and the synchronous belts can be reduced by adopting two synchronous belts compared with the synchronous belts with one wide size, so that the goods (box) can be more conveniently transported and unloaded onto the fork.

In order to ensure the stability of goods in the transportation and conveying processes, the lifting, unloading, storing and conveying integrated transportation device is preferably provided with guide plates for stabilizing and guiding the goods on the outer edges of two sides of the synchronous belt on the planar frame layer; further, the interval is set for the distance and is provided with the division board in order to keep apart two adjacent casees goods on the hold-in range, and the division board can also play the effect of supplementary propelling movement goods at the in-process of hold-in range conveying.

According to the lifting, unloading, storing and transporting integrated transporting device, the rotating assembly is used for controlling the lifting hook assembly connected with the lifting assembly to rotate so as to place goods lifted by the lifting hook assembly on the synchronous belt assembly, and therefore on the basis that the lifting assembly rotates, the rotating assembly can adopt rotating parts commonly used in the field, such as a stepping motor, a turntable and other conventional assemblies. For guaranteeing transportation smoothness nature and work efficiency, the utility model discloses in, rotating assembly includes the steering wheel, steering wheel fixed mounting is on the frame. The steering wheel includes steering wheel body and the steering wheel of this body coupling of steering wheel, and the steering wheel passes through the connecting rod and rises to rise subassembly fixed connection.

Above-mentioned hang and unload warehousing and transportation integration conveyer, the hoisting component mainly is used for controlling the lifting hook subassembly and goes up and down to snatch or unload the goods, hoisting component can be for hydraulic pressure lifting equipment or rack and pinion transmission hoisting component, the utility model discloses in preferably be rack and pinion transmission component. Specifically, rise the subassembly and include L type mounting panel, second motor, gear and rack, L type mounting panel comprises integrated into one piece's diaphragm and riser, and the riser is cavity platelike structure, and second motor fixed mounting is in the diaphragm upper surface, and the gear is installed in the cavity of riser and is connected with the output shaft of second motor, and the rack wears to locate in the cavity of riser and meshes with the gear mutually, and the rack removes to contact with the inside wall of riser with other sides of gear engaged with, and the lower extreme tip of rack is connected with the hook subassembly. By adopting the gear rack transmission assembly, the efficiency is considered, and meanwhile, the components are simple conventionally, convenient to manufacture and install and easy to control.

According to the lifting, unloading, storing and transporting integrated transportation device, the lifting hook assembly is used for lifting goods, the main part is the lifting hook, and the lifting hook can be designed according to a conventional design method in the field on the basis of meeting the requirement of lifting goods. The utility model discloses preferred integrated into one piece's of well lifting hook subassembly lifting hook body and connecting block, connecting block and play to rise subassembly fixed connection, the lifting hook body is L type structure, vertical section and horizontal segment including integrated into one piece. In order to prevent goods from sliding off, the tail end of the horizontal section extends upwards to form a limiting bulge, and the height of the limiting bulge is greater than that of the highest point of the horizontal section to prevent the goods from falling off; in order to ensure the stability of the goods during transportation, the upper surface of the horizontal section (i.e. the direct contact surface between the hook and the goods hanging rope) is preferably of an outer convex arc structure, so that the contact area is increased, and the stability of the goods is increased.

The lifting, unloading, storing and transporting integrated transportation device preferably comprises a frame and two planar frame layers, wherein each planar frame layer is of a square structure and comprises four integrally formed cross rods; the frame comprises four stand columns and cross beams, the four stand columns are respectively fixedly connected with four vertexes of the plane frame layer, two stand columns located on the same side edge are connected through the cross beams, and the cross beams are used for installing the winding drum assembly and the fixed pulleys. A group of transportation units are arranged on each layer of plane frame, and a group of hanging and unloading units and a group of fork unloading units are arranged on the frame corresponding to the group of transportation units.

In the hoisting, unloading, storing and transporting integrated transporting device, the wheels are preferably universal wheels or Mecanum wheels, and the number of the wheels is four.

Compared with the prior art, the utility model provides a technical scheme has following beneficial effect:

(1) the utility model provides a hang and unload warehousing and transportation integration conveyer, unload the unit and fork and unload the unit including frame body, transportation unit, hang and unload the unit and hang and get the goods and transport to the transportation unit through hanging, store the goods by the transportation unit transportation again, in the transportation, hang and unload unit and transportation unit and can provide storage space simultaneously and store the goods to realize many goods and get with the fortune, greatly promoted cargo handling efficiency.

(2) The utility model provides a hang and unload warehousing and transportation integration conveyer, it is middle and upper in frame body inner space with the transportation unit integration, make the whole space occupancy of device little, the obstacle of keeping away that can be better in the transportation, in narrow operational environment, also can need not to turn round, turn round independently accomplish snatch, transport all action processes such as storage, uninstallation, the flexibility is good, the reliability is high.

(3) The utility model provides a hang and unload warehousing and transportation integration conveyer, it is by rotating assembly to hang and unload the unit, play to rise the subassembly and the hook subassembly is constituteed to play to rise the subassembly and regard as rotating assembly and hook subassembly's intermediate junction mechanism, realize snatching, transporting of goods, it is rack and pinion drive assembly to rise the subassembly, be rigid connection between its and the hook subassembly, avoided the shortcoming of rocking of tower crane formula flexonics, it is high to snatch the precision, need not artifical supplementary, transportation precision and efficiency have been improved, the human cost is reduced.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of the integrated transportation device for lifting, unloading, storing and transporting;

FIG. 2 is a schematic view of the three-dimensional structure of the integrated transportation device for lifting, unloading, storing and transporting;

FIG. 3 is a schematic structural view of the frame body of the present invention;

FIG. 4 is a schematic structural view of a transportation unit (without partition board) of the present invention;

FIG. 5 is a schematic view of the structure of the hanging and unloading unit of the present invention;

description of reference numerals: 1. a frame body; 11. a planar shelf layer; 12. a frame; 13. a wheel; 2. a transport unit; 21. a first motor; 22. a first synchronization belt; 23. a second synchronous belt; 24. a drive shaft; 25. a guide plate; 3. a hanging and unloading unit; 31. a steering engine body; 32. a rudder wheel; 33. an L-shaped mounting plate; 34. a second motor; 35. a gear; 36. a rack; 37. a hook; 38. a connecting rod.

Detailed Description

In order that the technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings, it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the present invention.

The lifting, unloading, storing and transporting integrated transporting device in the embodiment, as shown in fig. 1-2, comprises a frame body 1, a transporting unit 2, a lifting and unloading unit 3 and a fork and unloading unit 4.

As shown in fig. 3, the frame body 1 includes an integrally formed frame 12 and two planar frame layers 11. The planar frame layer 11 is in a square structure and comprises a first cross rod, a second cross rod, a third cross rod and a fourth cross rod which are arranged clockwise. The frame 12 includes a first upright, a second upright, a third upright, a fourth upright and a cross beam, and the bottom ends of the four uprights are connected with four vertexes of the lower planar frame layer 11 in sequence. Four vertexes of the upper plane frame layer 11 are respectively connected with the middle positions of the four stand columns. The vertex of the first cross bar and the vertex of the fourth cross bar are provided with a first upright post, the vertex of the first cross bar and the second cross bar are provided with a second upright post, the vertex of the second cross bar and the third cross bar are provided with a third upright post, and the vertex of the third cross bar and the fourth cross bar are provided with a fourth upright post. The top ends of the first upright post and the second upright post are connected by a cross beam. Four Mecanum wheels are mounted on the lower planar frame layer 11. A group of transportation units 2 are arranged on each layer of plane frame layer 11, and a group of hanging and unloading units 3 are arranged on the frame 12 corresponding to the group of transportation units 2. Namely two groups of transportation units 2 and two groups of hanging and unloading units 3.

As shown in fig. 1, 2 and 4, two sets of transport units 2 are disposed on the upper and lower flat rack layers 11 and 11, respectively. The transport unit 2 includes a first motor 21 and a timing belt assembly. The synchronous belt component comprises a synchronous belt, a driving belt wheel, a driven belt wheel, a driving shaft 24 and a driven shaft. The number of the timing belts in this embodiment is two. Specifically, the timing belt includes a first timing belt 22 and a second timing belt 23, the driving pulley includes a first driving pulley and a second driving pulley, the driven pulley includes a first driven pulley and a second driven pulley, and the driven shaft includes a first driven shaft and a second driven shaft. The first motor 21 is fixedly arranged on the outer side of the first cross rod through a motor mounting seat. One end of the driving shaft 24 is fixedly connected with the output shaft of the first motor 21, and the other end is rotatably connected with the outer side of the first cross rod through a rotating shaft mounting seat. The first driving pulley and the second driving pulley are sleeved on the driving shaft 24 at a certain distance and are fixedly connected with the driving shaft 24. The first driven shaft and the second driven shaft are respectively installed on the outer side of the third cross rod through the rotating shaft installation seats, and the two ends of the first driven shaft and the second driven shaft are rotatably connected with the rotating shaft installation seats. The first driven belt wheel and the second driven belt wheel are respectively sleeved on the first driven shaft and the second driven shaft, and the positions of the first driven belt wheel and the second driven belt wheel correspond to the first driving belt wheel and the second driving belt wheel respectively. The two end parts of the first synchronous belt 22 are respectively sleeved on the first driving pulley and the second driving pulley, and the two end parts of the second synchronous belt 23 are respectively sleeved on the second driving pulley and the second driven pulley. Guide plates 25 are installed at outer side edges of the first and second timing belts 22 and 23, respectively, between the first and third cross bars. The first timing belt 22 and the second timing belt 23 are also provided with a spacer, not shown, at a set distance.

As shown in fig. 1, 2 and 5, two sets of unloading units 3 are respectively arranged on the third upright post and the fourth upright post. The lifting and unloading unit 3 comprises a rotating assembly, a lifting assembly and a lifting hook assembly.

The rotating assembly comprises a steering engine. The steering engine is fixedly arranged on the third/fourth upright post through the steering engine mounting seat. The steering engine comprises a steering engine body 31 and a steering wheel 32 connected with the steering engine body 31, and the steering engine body 31 controls the steering wheel 32 to rotate.

The lifting assembly comprises an L-shaped mounting plate 33, a second motor 34, a gear 35 and a rack 36. The L-shaped mounting plate 33 is composed of a horizontal plate and a vertical plate which are integrally formed, the vertical plate is of a hollow plate-like structure, and the horizontal plate is of a flat plate-like structure. The rudder plate 32 is fixedly connected with the lower surface of the cross plate through a connecting rod 38. The second motor 34 is fixedly mounted on the upper surface of the transverse plate. The gear 35 is arranged in the cavity of the vertical plate and is connected with the output shaft of the second motor 34, the rack 36 is arranged in the cavity of the vertical plate in a penetrating mode and is meshed with the gear 35, and the other side faces of the rack 36 except the side faces meshed with the gear 35 are in contact with the inner side wall of the vertical plate.

The lifting hook component comprises an integrally formed connecting block and a lifting hook body, and the lifting hook body is of an L-shaped structure and comprises an integrally formed vertical section and a horizontally-formed horizontal section. The top of the vertical section is connected with the connecting block, and the top of the connecting block is fixedly connected with the lower end part of the rack 36. The tail end of the horizontal section extends upwards to form a limiting bulge, and the height of the limiting bulge is greater than that of the highest point of the horizontal section to prevent goods from falling; the upper surface of horizontal segment (being lifting hook 37 and goods hang rope direct contact face) is outer convex arc structure, thereby increase area of contact increases the stability of goods in order to guarantee the stability of goods in the transportation.

The lifting, unloading, storing and transporting integrated transporting device provided by the embodiment has various lifting and transporting structures, so that goods can be transported by combining different transporting structures according to actual conditions. The main hoisting, unloading, storing and transporting modes of the transport vehicle comprise the following two modes:

firstly, the lifting component controls the lifting hook 37 to descend to grab the goods, and then when the goods are lifted to a certain height, the steering engine body 31 is started to drive the rudder plate 32 and the lifting component connected with the rudder plate 32 to rotate, so that the goods are transferred to the synchronous belt, then the first motor 21 controls the synchronous belt to move, so that the goods are conveyed to the tail end from the starting end of the synchronous belt, but are not conveyed to the fork frame 41. When unloading the goods, the first motor 21 controls the timing belt to move in the reverse direction, so that the goods are returned to the starting end, picked up again by the hook 37 and placed at the designated position.

And secondly, only using the hoisting and unloading unit 3 to hoist and unload and transport the goods.

In summary, the lifting, unloading, storing and transporting integrated transporting device provided by the embodiment has multiple types and multiple transportation operations, can adopt different lifting and unloading modes for different cargoes, and the storage space inside the transporting vehicle is large, so that eight cargoes (two cargoes are stored on one synchronous belt, one cargo is stored on one hook, and one fork frame is stored on one fork frame) can be transported at most simultaneously in the embodiment, and the working efficiency is greatly improved. The transportation device has small space occupancy, can better avoid barriers in the transportation process, can finish the whole set of hoisting, unloading, storing and transporting work without turning and turning around even in a long and narrow space, and has good flexibility and reliability. Each component of the transportation device is simple, easy to manufacture and assemble, and suitable for industrial production and popularization.

It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.

Claims (8)

1. The utility model provides a hang integration conveyer of unloading warehousing and transportation which characterized in that: comprises a frame body (1), a transportation unit (2) and a hanging and unloading unit (3);

the frame body (1) comprises a frame (12) and at least one plane frame layer (11), the plane frame layer (11) is horizontally arranged in the frame (12) and is fixedly connected with the frame (12), and a plurality of wheels (13) are arranged on the plane frame layer (11) at the bottommost layer; a group of transportation units (2) are arranged on each plane frame layer (11), and a group of hanging and unloading units (3) are arranged on the frame (12) corresponding to the group of transportation units (2);

the conveying unit (2) comprises a first motor (21) and a synchronous belt assembly, the first motor (21) and the synchronous belt assembly are both arranged on the plane frame layer (11), and an output shaft of the first motor (21) is connected with the synchronous belt assembly;

the lifting and unloading unit (3) comprises a rotating assembly, a lifting assembly and a lifting hook assembly, the rotating assembly is mounted on the frame (12) and is positioned above the starting end of the synchronous belt assembly, the rotating output end of the rotating assembly is fixedly connected with the lifting assembly to drive the lifting assembly to rotate, and the lifting end of the lifting assembly is fixedly connected with the lifting hook assembly to drive the lifting hook assembly to lift;

the lifting assembly of the lifting and unloading unit (3) controls the lifting hook assembly to lift and take the goods, the rotating assembly controls the lifting assembly to rotate and place the goods on the synchronous belt assembly of the corresponding transportation unit (2), the synchronous belt assembly stores and transports the goods, and the goods are transported to the designated position and unloaded.

2. The integrated lifting, unloading, storing and transporting transportation device of claim 1, wherein: the synchronous belt assembly comprises a synchronous belt, a driving belt pulley, a driven belt pulley, a driving shaft (24) and a driven shaft, the driving belt pulley is sleeved on the driving shaft (24) and is fixedly connected with the driving shaft (24), one end part of the driving shaft (24) is rotatably connected with one side edge of the plane frame layer (11), and the other end part of the driving shaft is fixedly connected with an output shaft of the first motor (21); the driven shaft is sleeved on the driven shaft and is fixedly connected with the driven shaft, and the end parts of the two ends of the driven shaft are rotatably connected with the other side edge of the plane frame layer (11); the end parts of the two ends of the synchronous belt are respectively sleeved on the driving belt wheel and the driven belt wheel.

3. The integrated lifting, unloading, storing and transporting transportation device of claim 2, wherein: guide plates (25) are arranged on the plane frame layer (11) at the outer edges of two sides of the synchronous belt; and isolation plates are arranged on the synchronous belt at intervals of set distance.

4. The integrated lifting, unloading, storing and transporting transportation device of claim 1, wherein: the rotating assembly comprises a steering engine, the steering engine is fixedly installed on the frame (12), the steering engine comprises a steering engine body (31) and a steering wheel (32) connected with the steering engine body (31), and the steering wheel (32) is fixedly connected with the lifting assembly through a connecting rod (38).

5. The integrated lifting, unloading, storing and transporting transportation device of claim 1, wherein: rise the subassembly and include L type mounting panel (33), second motor (34), gear (35) and rack (36), L type mounting panel (33) comprise integrated into one piece's diaphragm and riser, and the riser is cavity platelike structure, second motor (34) fixed mounting in the diaphragm upper surface, gear (35) are installed in the cavity of riser and are connected with the output shaft of second motor (34), rack (36) wear to locate in the cavity of riser and mesh mutually with gear (35), rack (36) except that other sides with gear (35) mesh mutually contact with the inside wall of riser, the lower extreme tip of rack (36) is connected with the hook subassembly.

6. The integrated lifting, unloading, storing and transporting transportation device of claim 1, wherein: the lifting hook component comprises an integrally formed lifting hook body and a connecting block, the connecting block is fixedly connected with the lifting component, the lifting hook body is of an L-shaped structure and comprises an integrally formed vertical section and a horizontal section, the tail end of the horizontal section extends upwards to form a limiting bulge, the upper surface of the horizontal section is of an outward convex arc-shaped structure, and the height of the limiting bulge is greater than that of the highest point of the horizontal section.

7. The integrated lifting, unloading, storing and transporting transportation device of any one of claims 1-6, wherein: the frame body (1) comprises a frame (12) and two plane frame layers (11), wherein the plane frame layers (11) are of a square structure and comprise four integrally formed cross rods; the frame (12) comprises four upright posts and cross beams, the four upright posts are fixedly connected with four vertexes of the plane frame layer (11) respectively, two upright posts located on the same side are connected through the cross beams, and the cross beams are used for installing the winding drum assembly and the fixed pulleys (43).

8. The integrated lifting, unloading, storing and transporting transportation device of any one of claims 1-6, wherein: the wheels (13) are universal wheels or Mecanum wheels, and the number of the wheels (13) is four.

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