Box sealing device and packing machine

Abstract

The present application provides a box sealing device, including two oppositely arranged rotating rods, and bending pieces convexly provided at one ends of the rotating rods; the two bending pieces are bent towards each other, and the bending pieces are arranged at an acute angle to the rotating rods. By means of rotating rods and bending pieces at an acute angle to the rotating rods, bending pieces bend two side covers, and allow hooking tongues of the side covers to hook each other to a certain extent, resulting in a simple structure and high stability.

1 . A box sealing device, comprising two oppositely arranged rotating rods, and bending pieces convexly provided at one ends of the rotating rods; the two bending pieces are bent towards each other, and the bending pieces are arranged at an acute angle to the rotating rods. 
     
     
         2 . The box sealing device of  claim 1 , wherein the bending pieces comprise fixing parts attached to the rotating rods, and bending parts convexly arranged on the fixing parts. 
     
     
         3 . The box sealing device of  claim 2 , wherein the acute angle between the bending part and the fixing part is 60-85 degrees. 
     
     
         4 . The box sealing device of  claim 2 , wherein the bending pieces comprise bending piece bodies connected with the rotating rods, the bending parts are arranged at one ends of the bending piece bodies that away from the rotating rods; the two bending parts are arranged in a mutually staggered manner. 
     
     
         5 . The box sealing device of  claim 4 , wherein the rotating rods are further provided with first protrusion pieces, and the two first protrusion pieces are oppositely arranged to limit a minimum distance between the two rotating rods. 
     
     
         6 . The box sealing device of  claim 4 , further comprising a mounting bracket, the rotating rods are hinged to two sides of the mounting bracket; the rotating rods are connected with a first driving member to drive the two rotating rods to move towards each other. 
     
     
         7 . The box sealing device of  claim 4 , wherein the two rotating rods are respectively provided with a second protrusion piece, wherein one of the second protrusion pieces is provided on one of the rotating rods and protrudes towards the other rotating rod, and protruding heights of the second protrusion pieces are less than protruding heights of the bending pieces. 
     
     
         8 . The box sealing device of  claim 7 , wherein the rotating rods are provided with first guide rails; the bending pieces are capable of moving along the first guide rails to be close to or away from the second protrusion pieces. 
     
     
         9 . The box sealing device of  claim 6 , further comprising a hooking mechanism, the hooking mechanism comprises a second driving member and a rotating plate, the second driving member is detachably connected with the mounting bracket, the rotating plate is fixed to the second driving member to rotate with the second driving member, and the two rotating rods are located on two sides of the rotating plate. 
     
     
         10 . The box sealing device of  claim 9 , further comprising extension parts, one ends of the bending piece bodies are connected with the rotating rods, the other ends of the bending piece bodies are connected with the extension parts, and the extension parts of the two bending pieces are arranged in a staggered manner. 
     
     
         11 . The box sealing device of  claim 10 , wherein the extension parts are inclined relative to the bending piece bodies in a direction close to the rotating plate. 
     
     
         12 . The box sealing device of  claim 10 , wherein pressing pieces are arranged at one ends of the bending piece bodies, the pressing pieces are positioned on one sides of the extension parts, the extension part and the pressing piece on one of the rotating rod are staggered with the extension part and the pressing piece on the other rotating rod. 
     
     
         13 . A packing machine, comprising the box sealing device in  claim 9 . 
     
     
         14 . A packing machine, comprising the box sealing device in  claim 12 . 
     
     
         15 . A method for hooking side covers, adopting the packing machine in  claim 13 , comprising the following steps:
 driving, by a first driving member, two rotating rods to move towards each other to drive bending pieces fixed to the rotating rods to move towards each other;   allowing bending parts of the two bending pieces to be close to each other, to come into contact with a packing box and to bend side covers of the packing box;   inserting rotating plate of a hooking mechanism between the bent side covers;   driving, by a second driving member, the rotating plate to rotate once by 180° so that the side covers are completely hooked; and   driving, by a third driving member, the box sealing device to be away from the packing box.   
     
     
         16 . A method for hooking side covers, adopting the packing machine in  claim 14 , comprising the following steps:
 driving, by a third driving member, a box sealing device to a designated position;   driving, by a first driving member, two rotating rods to move towards each other to drive bending pieces fixed to the rotating rods to move towards each other;   allowing bending parts of the two bending pieces to be close to each other, to come into contact with a packing box and to bend side covers of the packing box;   allowing pressing pieces to press down the side cover on one side and to be inserted into the edge of the side cover on the other side, so that the side covers are preliminarily hooked;   inserting rotating plate of a hooking mechanism between the bent side covers;   driving, by a second driving member, the rotating plate to rotate once by 180° so that the side covers are completely hooked; and   driving, by the third driving member, the box sealing device to be disengaged from the packing box.