JP7069807B2 - Box transfer device - Google Patents

Description

The present invention relates to a box transport device used for boxing work of articles.

Patent Document 1, for example, describes a box transport device in which an empty box is carried in without using a power means and the actual box packed in a box is carried out without using a power means when packing an article. ..

This box transfer device includes a box mount and a weight. The box mount can be raised and lowered between the receiving position where the empty box carried in by the downhill carry-in conveyor is received and the delivery position where the actual box containing the goods in the empty box is sent out to the downhill carry-out conveyor. It is provided. The weight is connected to the box mount via a cable and a pulley so as to move upward as the box mount descends and move downward as the box mount rises.

According to the box transfer device, since the box mounting table is raised and lowered by a weight, a cable, and a pulley, it is possible to perform the boxing work by an inexpensive mechanism that does not use a power means.

Japanese Unexamined Patent Publication No. 9-136715

However, in the conventional box transport device described in Patent Document 1, when the article to be packed in an empty box is switched to an article heavier than before, the box mounting table descends quickly and the boxed article is subjected to. May affect quality.

The present invention has been made in view of such circumstances, and an object of the present invention is to slowly lower the box mounting table even when the article to be boxed is switched to a heavy article. The purpose is to provide a box transport device capable of performing.

The box transport device that solves the above problems has a receiving position for receiving an empty box carried in by a downward-grading carry-in conveyor and a sending position for sending an actual box in which an article is packed in the empty box to a downward-grading carry-out conveyor. The box mount is provided so as to be able to move up and down between the boxes, and the box mount is slidably arranged in the cylinder in which the liquid is stored, and slides upward when the box mount is lowered. It is provided with a weight connected to the box mounting table via a cable and a slide so as to slide downward when the box is raised.

According to the above configuration, the box mounting table receives the empty box carried in by the downhill carry-in conveyor at the receiving position. The worker packs the goods in an empty box on the box stand. The box-standing stand is in a state in which a real box in which articles are packed is placed.

An upward force acts on the box mount due to the weight of the weight connected via the cable and the pulley. Further, a downward force acts on the box mounting table due to the weight of the box mounting table itself and the weight of the actual box on the box mounting table. When the latter force overcomes the former force, the box mounting table on which the actual box is placed descends while sliding the weight upward. The liquid in the cylinder acts as a resistance when the weight slides upward and the box mounting table descends. Therefore, even when the article to be boxed is switched to a heavy article, the box mount is slower than the conventional box carrier in which the weight is simply connected to the box mount via cables and pulleys. It is possible to lower it.

When the box mounting stand descends to the delivery position, the actual box is sent out to the downhill unloading conveyor. The sent out actual box is carried out by a carry-out conveyor.
Due to the weight of the actual box, the downward force does not act on the box mounting table to which the actual box has been sent out. The weight slides downward in the cylinder to raise the box mount connected via cables and pulleys. When the box stand rises to the receiving position, it receives a new empty box carried in by the carry-in conveyor.

According to the box transfer device, even when the article to be boxed is switched to a heavy article, the box mounting table can be slowly lowered.

The schematic side view of the box transporting apparatus in one Embodiment. The schematic plan view which shows the relationship between the box mounting table in one Embodiment, and the member arranged around it. The schematic side view which shows the positional relationship of the 1st receiving part, the 2nd receiving part and a stopper in one Embodiment. (A) and (b) are schematic side views for explaining how the movement restricting member is swung in conjunction with the ascent of the box mounting table in one embodiment. (A) is a cross-sectional view showing the structure inside the cylinder in one embodiment, and (b) is a partial cross-sectional view showing a part of FIG. 5 (a) in an enlarged manner. The partial perspective view of the resistance variable mechanism in one Embodiment. In one embodiment, a partial side view showing a state in which the loading platform portion of the dolly is accommodated in the accommodating portion. (A) is a schematic plan view showing a state in which the loading platform portion of the trolley in one embodiment is housed in the accommodating portion, and (b) is a partial schematic side view of the trolley. In one embodiment, a schematic plan view showing the relationship between the carry-out conveyor and the trolley from which the loading platform portion is pulled out from the accommodating portion. In one embodiment, a partial schematic side view showing a state in which an actual box is placed on a box mounting table at a receiving position. In one embodiment, a partial schematic side view showing a state in which a box mounting table on which actual boxes and empty boxes are stacked is lowered to an upper box packing position. FIG. 2 is a schematic side view showing a state in which the box mounting table of FIG. 11 is lowered to the delivery position. FIG. 12 is a schematic side view of a part showing a state in which the mounting portion of the box mounting table of FIG. 12 is tilted to be in the actual box feeding posture. FIG. 13 is a partial schematic side view showing a state in which the actual boxes stacked in two stages are sent from the mounting portion to the carry-out conveyor. FIG. 14 is a partial schematic side view showing a state in which the box mounting table in which the actual box of FIG. 14 is sent out to the carry-out conveyor is in the process of rising. A partial schematic side view showing a state in which the box mounting table of FIG. 15 is raised to the receiving position. In one embodiment, a schematic side view showing a relationship between a carry-out conveyor in which an actual box is stored and a trolley before the loading platform portion is pushed into the accommodating portion. FIG. 17 is a partial schematic side view showing a state of a retractable member and a carry-out restricting member when the loading platform portion is pushed into the accommodating portion. FIG. 18 is a schematic side view of a part showing a state of a retractable member and a carry-out restricting member when the loading platform portion is further pushed into the accommodating portion. In one embodiment, a schematic side view showing how the actual box is transferred from the unloading conveyor to the trolley as the loading platform is pulled out from the accommodating portion.

Hereinafter, an embodiment of the box transfer device will be described with reference to the drawings.
In the following description, in order to specify the positional relationship of each part of the box transport device, the worker who performs the boxing work is used as a reference, and the direction in which the worker faces when packing the box is set as the front. In addition, the top, bottom, left, and right when viewed from the operator are the top, bottom, left, and right of the box transport device.

As shown in FIG. 1, the box transport device 10 is used when performing a boxing operation of packing various articles 11 such as parts, materials, and products into a box 12. The box 12 includes a box body 13 and a lid 14, and is formed in a stackable shape. In the present embodiment, the empty box before the article 11 is packed is referred to as an "empty box 15", and the box in which the article 11 is packed is referred to as a "real box 16".

The box transfer device 10 includes a frame 17 for arranging a conveyor or the like. A pair of down-gradient carry-in conveyors 18 and 21 and a down-gradient carry-out conveyor 22 are attached to the frame 17. Both the carry-in conveyors 18 and 21 are composed of roller conveyors, and are inclined so as to be lower toward the rear side (right side in FIG. 1).

When the empty box 15 is put into the upper carry-in conveyor 18, it moves backward due to its own weight. A locking piece 19 indicated by a two-dot chain line is provided at the rear end of the upper carry-in conveyor 18. The locking piece 19 has a function of receiving an empty box 15 moving backward. With this locking piece 19, it is possible to store a plurality of empty boxes 15 on the upper carry-in conveyor 18. Further, these empty boxes 15 can be grasped and taken out by the operator P1 (see FIG. 2) in order from the rear of the frame 17.

The lower carry-in conveyor 21 is arranged below the upper carry-in conveyor 18. The distance between the two carry-in conveyors 18 and 21 is set to be larger than the vertical dimension of the box 12. When the empty box 15 is put into the lower carry-in conveyor 21, it moves backward due to its own weight.

As shown in FIGS. 1 and 9, the carry-out conveyor 22 is arranged below the lower carry-in conveyor 21. The carry-out conveyor 22 includes a pair of roller conveyors 20 extending in the front-rear direction while being separated from each other in the left-right direction, and is inclined so as to be lower toward the front side. The distance between the lower carry-in conveyor 21 and the carry-out conveyor 22 is set to be larger than the vertical dimension of the actual boxes 16 stacked in two stages even in the narrowest place. When both the actual boxes 16 are put into the carry-out conveyor 22, they move forward due to their own weight.

Here, assuming that the dimension in the left-right direction is the width, the carry-out conveyor 22 has a width W1 narrower than the width W2 of the actual box 16 shown by the two-dot chain line in FIG. The width W1 of the carry-out conveyor 22 is a dimension between the left side surface of the roller conveyor 20 on the left side and the right side surface of the roller conveyor 20 on the right side. The carry-out conveyor 22 is arranged at a position that satisfies the following conditions in the width direction of the box transport device 10. The condition is a position where the actual box 16 can be received at the intermediate portion in the width direction of the actual box 16 sent out from the box mounting table 27 described later. Therefore, when the actual box 16 is sent out from the box mounting table 27 to the carry-out conveyor 22, the actual box 16 is placed on the carry-out conveyor 22 with both sides of the actual box 16 protruding from the carry-out conveyor 22 in the width direction. Will be moved.

A carry-out restricting member 23 extending in the front-rear direction is supported by a shaft 24 on the carry-out conveyor 22. In the carry-out restricting member 23, a pair of locking pins 25 project upward from a portion on the front side of the shaft 24, that is, a front end portion in the present embodiment.

The carry-out control member 23 swings between the carry-out control posture shown in FIG. 1 and the carry-out restriction release posture shown in FIG. 7. The carry-out restriction posture is a posture in which both locking pins 25 are located in the carry-out path of the actual box 16 by the carry-out conveyor 22 to restrict the carry-out of the actual box 16 from the carry-out conveyor 22. Further, the carry-out restriction release posture is a posture in which both locking pins 25 are retracted downward from the carry-out route to release the restriction. The shaft 24 supports the carry-out control member 23 at a position shifted forward from the center of gravity of the carry-out control member 23. The carry-out control member 23 is urged to the side that takes the carry-out control posture by the weight balance around the shaft 24.

As shown in FIG. 9, in the box transport device 10, both side portions of the carry-out conveyor 22 in the width direction are spaces, and these spaces accommodate the accommodating portions 26 for accommodating the loading platform portion 77 of the trolley 75, which will be described later. It is composed.

As shown in FIGS. 1 and 2, a box mounting table 27 that moves up and down between the receiving position and the sending position is arranged behind the frame 17. The receiving positions shown in FIGS. 1 and 10 are positions for receiving the empty boxes 15 carried in by the lower carry-in conveyor 21, and are set behind the carry-in conveyor 21. The height of the receiving position is set so that the empty box 15 on the box mounting table 27 is at the same height as the arm height of the worker P1. The delivery position shown in FIG. 13 is a position where the actual box 16 is sent to the carry-out conveyor 22, and is set behind the carry-out conveyor 22.

The upper boxing position shown in FIG. 11 is set between the receiving position and the sending position. The upper boxing position is set at a position lower than the receiving position by the height of the empty box 15.

The boxing operation is performed on the empty box 15 on the box mounting table 27 when the box mounting table 27 is in the receiving position. Further, the boxing operation is performed on the empty box 15 in the upper stage on the box mounting table 27 when the box mounting table 27 is in the upper box packing position.

As shown in FIGS. 1 and 2, the box mounting table 27 includes a frame 28 and a mounting portion 31 swingably supported by the frame 28 by a shaft 29. The mounting portion 31 includes a pair of roller conveyors 32 extending in the front-rear direction while being separated from each other in the left-right direction.

A posture switching mechanism 33 for tilting the mounting portion 31 to switch the posture of the mounting portion 31 is provided. The posture switching mechanism 33 puts the mounting unit 31 in the empty box receiving posture at the receiving position of the box mounting table 27 (see FIG. 1), and sets the mounting unit 31 in the actual box at the sending position of the box mounting table 27 (see FIG. 13). Put it in the sending position.

The empty box receiving posture shown in FIG. 1 is a posture in which the mounting portion 31 is tilted so as to be lower toward the rear side, and in other words, as it is moved away from the lower carry-in conveyor 21. The actual box delivery posture shown in FIG. 13 is a posture in which the mounting portion 31 is tilted so as to be lower toward the front side and, in other words, to be higher as the distance from the carry-out conveyor 22 increases.

As shown in FIG. 1, a part of the posture switching mechanism 33 is composed of a cable 34. One end of the cable 34 is connected to the rear lower end of the frame 17. The other end of the cable 34 is connected to a portion rearward of the shaft 29 of the above-mentioned mounting portion 31, for example, a rear end portion of the mounting portion 31. As the cable 34, a cable having a length that causes tension when the box mounting table 27 is in the empty box receiving posture at the receiving position (see FIG. 1) is used. Therefore, when the box mounting table 27 rises to the receiving position, the cable 34 becomes tense, and the tension of the cable 34 acts on the rear end portion of the mounting portion 31. The rear end portion of the mounting portion 31 is pulled diagonally forward and downward by the cable 34, and the mounting portion 31 is tilted so as to be lower toward the rear side, so that the empty box receiving posture is set. Further, the cable 34 in the tense state restricts the ascent of the mounting portion 31.

A part of the posture switching mechanism 33 is composed of a leg portion 35 hanging from the rear end portion of the mounting portion 31 and a roller 36 supported by the lower end portion of the leg portion 35. The legs 35 have a length in which the rollers 36 come into contact with the ground G1 on which the box transport device 10 is installed when the box mounting table 27 is in the delivery position of FIG. The leg portion 35 having the roller 36 at the lower end portion is not provided at the front end portion of the mounting portion 31. Therefore, when the box mounting table 27 descends to the delivery position, the roller 36 comes into contact with the ground G1 and a pushing force acts on the rear end portion of the mounting portion 31, so that the mounting portion 31 is lower toward the front side. It is tilted so that it becomes, and it is put into the actual box sending posture.

As shown in FIG. 1, the box transfer device 10 includes two types of weights 37 and 41 and a resistance variable mechanism 46 attached to one of the weights 41. One weight 37 is connected to the box mount 27 via a cable 38 and a pulley 39 so as to move upward when the box mount 27 descends and move downward when the box mount 27 rises. The weight 37 exerts an upward force on the box mount 27 via the cable 38 and the pulley 39.

A bottomed cylindrical cylinder 44 extending in the vertical direction and having an open upper end is installed on the ground G1. The other weight 41 is slidably arranged in the cylinder 44 in the vertical direction. The weight 41 has a columnar shape extending in the vertical direction, and slides upward when the box mounting table 27 descends, and slides downward when the box mounting table 27 rises. It is connected to the box mounting table 27 via the pulley 43. The liquid 45 is stored in the cylinder 44. Most of the liquid 45 is made up of water and the rest is made up of oil. Due to the weight 41, an upward force with respect to the box mounting table 27 acts via the first cable 42 and the first pulley 43.

The variable resistance mechanism 46 receives resistance from the liquid 45 when the weight 41 slides downward when the box mounting table 27 rises, as compared with when the weight 41 slides upward when the box mounting table 27 descends. It is a mechanism to make it smaller.

As shown in FIGS. 5 (a) and 5 (b) and FIG. 6, the variable resistance mechanism 46 includes a shaft 47, a valve seat member 48, and a valve body 49. The shaft 47 hangs down from the weight 41. The valve seat member 48 has a disk shape and is fixed to the lower end portion of the shaft 47 at its central portion. Communication holes 48a penetrating in the vertical direction are formed at each of the plurality of points of the valve seat member 48. The valve body 49 has a disk shape. A shaft 47 is inserted through the central portion of the valve body 49. The valve body 49 is arranged between the weight 41 and the valve seat member 48, and can move in the vertical direction along the shaft 47.

The weight 41, the valve seat member 48, and the valve body 49 are all formed to have a diameter slightly smaller than the inner diameter of the cylinder 44, and have a flow path of the liquid 45 between the weight 41 and the inner wall surface of the cylinder 44. There is.
As shown in FIGS. 1 and 2, the box transport device 10 includes a first receiving portion 51, a second receiving portion 52, a start lever 53, and a stopper 55. The first receiving portion 51 is provided on the frame 28 of the box mounting table 27, and moves up and down together with the box mounting table 27. The second receiving portion 52 is provided in the frame 28 at a position higher than the first receiving portion 51 by the height of the empty box 15, and moves up and down together with the box mounting table 27.

The start lever 53 has a rod shape and is supported by the frame 17 by the shaft 54. The start lever 53 can be tilted between the lock position shown by the solid line in FIG. 2 and the unlock position shown by the alternate long and short dash line in FIG.

As shown in FIGS. 1 to 3, the stopper 55 is supported by the support member 57 supported by the shaft 56 with respect to the frame 17, and is supported by the shaft 58 with respect to the support member 57, and a part thereof protrudes from the support member 57. It is provided with a claw portion 59.

The support member 57 is connected to the start lever 53 via the second cable 61 and the second pulley 62, and can tilt in the vertical direction with the shaft 56 as a fulcrum. A return spring (not shown) constantly applies an urging force to the support member 57 to tilt the support member 57 upward. Further, the stopper 55 includes a regulation mechanism (not shown) that regulates the support member 57 from tilting upward from the position shown by the solid line in FIG.

The claw portion 59 can be tilted in the vertical direction with respect to the support member 57 with the shaft 58 as a fulcrum. A return spring (not shown) constantly applies an urging force to the claw portion 59 to tilt the claw portion 59 downward. The stopper 55 includes a regulating mechanism (not shown) that regulates the claw portion 59 from tilting downward from the posture extending along the line connecting the shafts 56 and 58.

The stopper 55 takes three postures (holding posture, holding release posture and tilting posture). As shown by the solid line in FIG. 3, the holding posture is such that both shafts 56 and 58 and the claw portion 59 are arranged in the front-rear direction so that the claw portion 59 moves up and down the first receiving portion 51 and the second receiving portion 52. It is a posture located on the route. The stopper 55 takes the holding posture when the starting lever 53 is in the locked position shown by the solid line in FIG. By taking a holding posture, the stopper 55 receives the first receiving portion 51 from the lower side, holds the box mounting table 27 at the receiving position shown in FIG. 1, and receives the second receiving portion 52 from the lower side to receive the box. The mounting table 27 is held in the upper boxing position of FIG.

As shown by the alternate long and short dash line in FIG. 3, the holding release posture is such that the shaft 58 is positioned diagonally rearward and downward of the shaft 56, and the claw portions 59 are arranged diagonally rearward and downward of the shaft 58. The portion 59 is in a posture of retreating diagonally forward and downward from the elevating path to release the holding. The stopper 55 takes the holding / releasing posture when the starting lever 53 is in the unlocking position shown by the alternate long and short dash line in FIG.

The tilted posture is a posture in which the shaft 58 is located behind the shaft 56 and the claw portion 59 is tilted so as to be higher toward the rear side as shown by the thick two-dot chain line in FIG. The stopper 55 tilts when the starting lever 53 is in the locked position shown by the solid line in FIG. 2 and the first receiving portion 51 or the second receiving portion 52 hits the claw portion 59 from below in the ascending process. Take a posture.

As shown in FIGS. 1 and 4 (a) and 4 (b), the box transport device 10 includes a movement restricting member 63, a third cable 67, and a driven member 68. The movement restricting member 63 extends in the front-rear direction and is supported by the shaft 64 with respect to the rear portion of the lower carry-in conveyor 21 or to a portion of the frame 17 near the rear portion.

The movement restricting member 63 includes a front locking pin 65 and a rear locking pin 66. The front locking pin 65 projects upward from a position in front of the shaft 64 of the movement restricting member 63. The rear locking pin 66 projects upward from a portion rearward of the shaft 64 of the movement restricting member 63.

The movement restricting member 63 swings between the movement restricting posture shown in FIG. 4A and the movement restricting release posture shown in FIG. 4B. In the movement restriction posture, the rear locking pin 66 is located in the carry-in path of the empty box 15 by the lower carry-in conveyor 21, and among the empty boxes 15 on the carry-in conveyor 21, the one located at the rearmost position is on the box mounting table 27. It is an attitude that regulates movement. Therefore, when the movement restricting member 63 takes the movement restricting posture, the other empty boxes 15 on the carry-in conveyor 21 are also restricted from moving backward. In the movement restricted posture, the front locking pin 65 retracts downward from the carry-in route.

Further, the movement restriction release posture is a posture in which the rear locking pin 66 retracts downward from the carry-in route to release the restriction. In the movement restriction release posture, the front locking pin 65 is located in the carry-in path. Therefore, when the movement restricting member 63 takes the movement restriction release posture, among the empty boxes 15 on the carry-in conveyor 21, those located behind the front locking pin 65 move from the carry-in conveyor 21 to the box mounting table 27. Is allowed, and those located in front of the front locking pin 65 are restricted from moving backward by the front locking pin 65.

The shaft 64 supports the movement restricting member 63 at a position shifted rearward from the center of gravity of the movement restricting member 63. Due to such support, the movement restricting member 63 is urged to the side that takes the movement restricting posture by the weight balance around the shaft 64.

One end of the third cable 67 is connected to the frame 17 and is immovable. The other end of the third cable 67 is connected to a portion rearward of the shaft 64 in the movement restricting member 63, and to the rear end in the present embodiment.

The driven member 68 is composed of pulleys and is rotatably attached to the box mounting table 27. The driven member 68 moves up and down together with the box mounting table 27 to approach and separate from the third cable 67. Then, the driven member 68 presses the third cable 67 from the lower side as the box mounting table 27 rises, and the movement restricting member 63 is put into the movement restriction release posture at the receiving position of the box mounting table 27.

As shown in FIG. 1, in the frame 17, a restraint bar 69 is supported above the front end portion of the carry-out conveyor 22 by a shaft 71 so as to be tiltable in the vertical direction. By tilting downward, the restraint bar 69 is locked to the grip portion 76 of the carriage 75, which will be described later, and restrains the grip portion 76.

As shown in FIGS. 7 to 9, the box transfer device 10 further includes a trolley 75 for carrying out the actual box 16 on the carry-out conveyor 22. Note that in FIG. 7, illustrations of peripheral parts of the carry-out conveyor 22, for example, the carry-in conveyors 18, 21, the box mounting table 27, and the like are omitted. This point is the same for FIGS. 17 and 20 described later.

The dolly 75 includes a grip portion 76, a pair of loading platform portions 77, and a plurality of wheels 78. Both loading platforms 77 extend in the front-rear direction while being separated from each other in the width direction of the carry-out conveyor 22. Both loading platform portions 77 are located below both side portions of the actual box 16 on the carry-out conveyor 22 in the width direction by being accommodated in the corresponding accommodating portions 26 on both sides of the carry-out conveyor 22 in the width direction. The grip portion 76 is a portion to be gripped when the carriage 75 is moved, and is arranged at the front end portion of the carriage 75. The wheels 78 are arranged at the bottom of the carriage 75.

As shown in FIGS. 18 and 19, between the unloading conveyor 22 and the trolley 75, the movement of the loading platform 77 when both loading platforms 77 are pushed into the accommodating section 26 is transmitted to the unloading restricting member 23. Therefore, a transmission mechanism 81 is provided to put the carry-out restriction member 23 into the carry-out restriction release posture.

A part of the transmission mechanism 81 is configured by a roller 82 attached to the front end portion of the carry-out control member 23 in front of the shaft 24 in the carry-out control member 23, and in the present embodiment. Of the lower surface of each loading platform portion 77, a portion excluding the rear end portion is composed of a horizontal plane 83. The height of the horizontal plane 83 is set so as to be as high as the highest position of the roller 82 when the carry-out restriction member 23 is in the carry-out restriction release posture shown in FIG. The rear end portion on the lower surface of each loading platform portion 77 is composed of an inclined surface 84 that is inclined so as to be higher toward the rear. The front end of the inclined surface 84 is connected to the horizontal plane 83. The horizontal plane 83 and the inclined surface 84 together with the roller 82 form a transmission mechanism 81.

As shown in FIGS. 7 to 9, a rod-shaped foldable member 85 is supported by a shaft 86 so as to be tiltable at the rear end portion of each loading platform portion 77. The portion where each foldable member 85 is supported corresponds to the front end portion in the pushing direction when each loading platform portion 77 is accommodated in the accommodating portion 26. The shaft 86 for each foldable member 85 supports the foldable member 85 at a position shifted upward from the center of gravity of the foldable member 85. With such support, each foldable member 85 is urged to take an upright posture extending in the vertical direction by the weight balance around the shaft 86. At least the upper end of each foldable member 85 projects into the carry-out path of the actual box 16 by the carry-out conveyor 22 when the foldable member 85 takes an upright posture.

A regulation mechanism (not shown) is provided between each foldable member 85 and the corresponding loading platform portion 77 to prevent the upper portion of the foldable member 85 in an upright posture from tilting backward from the shaft 86. There is.

Next, the operation and effect of the box transport device 10 of the present embodiment configured as described above will be described.
FIG. 1 shows a state that serves as a reference for the box transport device 10 when the box packing operation is started. It is assumed that the carriage 75 is in a state in which both loading platforms 77 are pulled out from the accommodating portion 26.

The start lever 53 is in the lock position shown by the solid line in FIG. 2, and the stopper 55 is in the holding posture shown by the solid line in FIG. The claw portion 59 of the stopper 55 is located in the elevating path of the first receiving portion 51 and the second receiving portion 52, and receives the first receiving portion 51 from below. By this receiving, the box mounting table 27 is held in the receiving position. An empty box 15 carried in by the lower carry-in conveyor 21 is placed on the mounting portion 31 of the box mounting stand 27. The second receiving portion 52 in the box mounting table 27 is located at a position higher than the first receiving portion 51 by the height of the empty box 15.

At the receiving position, as shown in FIG. 4 (b), the movement restricting member 63 takes the movement restriction release posture by pressing the third cable 67 upward by the driven member 68. In this movement restriction release posture, the rear locking pin 66 retracts downward from the carry-in path, and the front locking pin 65 is located in the carry-in path. The empty box 15 located in front of the front locking pin 65 on the lower carry-in conveyor 21 is restricted from moving backward by the front locking pin 65.

As shown in FIG. 1, the rear end portion of the mounting portion 31 is pulled diagonally forward and downward by the cable 34 in a tense state, and the mounting portion 31 is placed in an inclined empty box receiving posture so as to be lower toward the rear side. ing.

The weights 37 and 41 are located at the lowest point in the movable range.
In the carry-out control member 23, which is urged to take the carry-out control posture by the weight balance around the shaft 24, the lock pin 25 takes the carry-out control posture in which the locking pin 25 is located in the carry-out path of the actual box 16 by the carry-out conveyor 22. There is.

At this time, an upward force acts on the box mounting table 27 due to the weight of the weight 37 connected via the cable 38 and the pulley 39. Further, an upward force acts on the box mounting table 27 due to the weight of the weight 41 connected via the first cable 42 and the first pulley 43 and the weight of the resistance variable mechanism 46. ..

Further, a downward force acts on the box mounting table 27 due to the weight of the box mounting table 27 itself and the weight of the empty box 15 on the box mounting table 27.
The power of the former overcomes the power of the latter. However, since the cable 34 is in a tense state, the box mounting table 27 continues to be held at the receiving position.

As shown in FIGS. 1 and 2, the lid 14 is removed from the empty box 15 by the worker P1, and the article 11 is packed in the box body 13. At this time, since the empty box 15 on the box mounting table 27 is located at the same height as the arm height of the worker P1, the worker P1 packs the article 11 in the empty box 15 in a comfortable posture. It is easy to pack in a box.

Further, at this time, the mounting unit 31 takes an empty box receiving posture that is inclined so as to be lowered as it approaches the worker P1, in other words, as it moves away from the carry-in conveyor 21. The empty box 15 on the mounting portion 31 is in a state of being tilted toward the worker P1. Therefore, the worker P1 can easily perform the boxing work in this respect as well.

As the article 11 is packed in the empty box 15, the weight of the article 11 added to the box mounting table 27 increases. However, since the first receiving portion 51 is received from the lower side by the stopper 55 in the holding posture shown by the solid line in FIG. 3, the box mounting table 27 is held at the receiving position.

When the empty box 15 is filled with the specified number of articles 11, the worker P1 covers the box body 13 with the lid 14. The box mounting table 27 is in a state in which one actual box 16 is placed.
Subsequently, the worker P1 takes out the empty box 15 on the upper carry-in conveyor 18 which is located at the rearmost position as shown by the arrow of the alternate long and short dash line in FIG. 10, and this is on the box mounting table 27. It is stacked on the actual box 16. Since the empty box 15 is located at a high place by the height of the actual box 16, it becomes difficult to pack the empty box 15.

Therefore, in order to lower the empty box 15 to a height suitable for boxing work, the start lever 53 is operated by the operator P1, and the start lever 53 is moved from the lock position shown by the solid line in FIG. 2 to the two-dot chain line in FIG. It is tilted toward the unlocked position indicated by. The tilt of the starting lever 53 is transmitted to the stopper 55 via the second cable 61 and the second pulley 62. The stopper 55 is switched from the holding posture shown by the solid line in FIG. 3 to the holding release posture shown by the alternate long and short dash line in FIG. 3, and the claw portion 59 retracts from the ascending / descending path.

The holding of the box mounting table 27 by the stopper 55 is released, and there is nothing to receive the first receiving portion 51 from the lower side. On the other hand, since the actual box 16 is placed on the box mounting table 27, the downward force among the forces acting on the box mounting table 27 is larger than the upward force. Therefore, as shown in FIG. 11, the box mounting table 27 in which the actual boxes 16 and the empty boxes 15 are stacked descends while pulling up the weights 37 and 41.

Further, at this time, the mounting portion 31 descends while maintaining the empty box receiving posture.
The upward sliding of the weight 41 is performed while the weight 41 receives resistance from the liquid 45 in the cylinder 44. Moreover, as shown in FIGS. 5A, 5B and 6A, in the variable resistance mechanism 46, the valve body 49 approaches the valve seat member 48, and the liquid 45 does not easily flow through the communication hole 48a. When the valve body 49 comes into contact with the valve seat member 48, the communication hole 48a is closed, and the liquid 45 is restricted from flowing through the communication hole 48a. The resistance that the weight 41 receives from the liquid 45 increases. Therefore, the box mounting table 27 can be slowly lowered.

As shown in FIG. 11, on the upper side of the carry-in conveyor 18, another empty box 15 located in front of the empty box 15 created by taking out the empty box 15 due to its own weight. It will move.

As the box mounting table 27 descends, the first receiving portion 51 and the second receiving portion 52 descend.
The cable 34 loosens as the box mounting table 27 descends. Further, as shown in FIG. 4A, the driven member 68 is lowered, the force with which the driven member 68 presses the third cable 67 upward is weakened, and the third cable 67 is loosened. The movement restricting member 63 urged by the weight balance around the shaft 64 switches to the movement restricting posture by tilting. The rear locking pin 66 enters the carry-in path of the empty box 15 by the carry-in conveyor 21, and among the empty boxes 15 on the carry-in conveyor 21, the one located at the rearmost position is restricted from moving from the carry-in conveyor 21 to the box mounting table 27. do. Along with this, the other empty boxes 15 on the carry-in conveyor 21 are also restricted from moving backward.

As shown in FIG. 11, the first receiving portion 51 is lower than the stopper 55 due to the lowering of the box mounting table 27, but the second receiving portion 52 is located higher than the stopper 55.
On the other hand, when the hand is released from the starting lever 53, the force for pulling the support member 57 via the second cable 61 and the second pulley 62 disappears. Due to the urging force of the return spring, the stopper 55 is returned from the holding release posture shown by the alternate long and short dash line in FIG. 3 to the holding posture shown by the solid line in FIG. As shown in FIG. 11, the claw portion 59 of the stopper 55 in the holding posture is located in the elevating path and receives the descending second receiving portion 52 from below. By this receiving, the box mounting table 27 is held in the upper box packing position which is lower than the receiving position by the height of the empty box 15. The empty box 15 on the actual box 16 is the actual box 16 on the box mounting table 27 when the first receiving portion 51 is received from below by the stopper 55 and the box mounting table 27 is held at the receiving position (FIG. FIG. 10), that is, the empty box 15 on the box mounting table 27 is located at the same height as the arm height of the worker P1. Therefore, the worker P1 can perform the work of removing the lid 14 from the empty box 15, packing the article 11 in the box body 13, and putting the lid 14 on the box body 13 in a comfortable posture.

Further, at this time, the mounting unit 31 is in an empty box receiving posture, and the empty box 15 on the mounting unit 31 is in a state of being tilted toward the worker P1. Therefore, the worker P1 can easily pack the article 11 in the empty box 15.

The movement of the stopper 55 from the holding release posture to the holding posture is transmitted to the starting lever 53 via the second cable 61 and the second pulley 62. The activation lever 53 is returned from the unlocked position shown by the alternate long and short dash line in FIG. 2 to the locked position shown by the solid line in FIG.

As the article 11 is packed in the empty box 15, the weight of the article 11 added to the box mounting table 27 increases. However, since the second receiving portion 52 is received from the lower side by the stopper 55 in the holding posture, the box mounting table 27 is continuously held in the upper box packing position.

When the start lever 53 is operated by the operator P1 and is tilted from the lock position shown by the solid line in FIG. 2 to the unlock position side shown by the alternate long and short dash line in FIG. 2, the posture of the stopper 55 is changed to the solid line in FIG. The holding posture shown in FIG. 3 is switched to the holding release posture shown by the alternate long and short dash line in FIG. 3, and the claw portion 59 of the stopper 55 retracts from the elevating path. The holding of the box mounting table 27 by the stopper 55 is released, and there is nothing to receive the second receiving portion 52 from the lower side. On the other hand, among the forces acting on the box mounting table 27, the downward force is increased by the weight of the increased actual box 16. The difference between the downward force and the upward force widens. Therefore, as shown in FIG. 12, the box mounting table 27 in which the actual boxes 16 are stacked in two stages descends while pulling up the weights 37 and 41.

At this time as well, the liquid 45 in the cylinder 44 is used when the weight 41 slides upward and the box mounting table 27 descends, as in the case where the box mounting table 27 descends from the receiving position to the upper boxing position. It becomes resistance. Further, in the variable resistance mechanism 46, the valve body 49 approaches or comes into contact with the valve seat member 48, the liquid 45 is restricted from flowing through the communication hole 48a, and the resistance that the weight 41 receives from the liquid 45 increases. Therefore, the box mounting table 27 can be slowly lowered.

When the roller 36 comes into contact with the ground G1 as the box mounting table 27 descends, a pushing force acts on the rear end portion of the mounting portion 31. As shown in FIG. 13, the mounting portion 31 is tilted so as to be lower toward the front side, and the mounting portion 31 is switched to the actual box feeding posture. In other words, the mounting unit 31 is tilted toward the carry-out conveyor 22. Therefore, the actual boxes 16 stacked in two stages on the mounting portion 31 can be smoothly sent out to the carry-out conveyor 22 as shown in FIG.

When both the actual boxes 16 are sent out from the box mounting table 27 to the carry-out conveyor 22, both real boxes 16 are in a state where both sides in the width direction are projected from the carry-out conveyor 22 as shown by the two-dot chain line in FIG. , Move forward on the carry-out conveyor 22. This direction is opposite to the loading direction of the empty box 15 by the lower loading conveyor 21.

At this time, as shown in FIG. 1, the carry-out control member 23 is in the carry-out control posture, and the upper ends of both locking pins 25 are located in the carry-out path of the actual box 16 by the carry-out conveyor 22. Therefore, it is restricted that the actual box 16 moves forward from the front end of the carry-out conveyor 22. The actual box 16 is stored on the carry-out conveyor 22.

A dolly 75 is used when carrying out the actual box 16 on the carry-out conveyor 22. At this time, the restraint bar 69 is tilted upward to be in the tilted state shown in FIG.
Here, as shown in FIG. 9, in the carriage 75, the pair of loading platform portions 77 extend in the front-rear direction while being separated from each other in the width direction of the carry-out conveyor 22. Further, as shown in FIG. 7, the foldable member 85, which is tiltably supported by the shaft 86 with respect to each loading platform portion 77, is urged by the weight balance around the shaft 86 and takes an upright posture. Each foldable member 85 is allowed to tilt the portion above the shaft 86 forward in the foldable member 85 in an upright posture, and is restricted from tilting backward. On the other hand, as shown in FIG. 9, accommodating portions 26 for accommodating the loading platform portion 77 are formed on both side portions of the carry-out conveyor 22 in the width direction. Therefore, by accommodating the loading platform portion 77 of the trolley 75 in the corresponding accommodating portion 26, each loading platform portion 77 is located below both side portions of the actual box 16 on the carry-out conveyor 22 in the width direction.

Further, during the above-mentioned accommodation, when the loading platform portion 77 of the trolley 75 is pushed into the corresponding accommodating portion 26, the movement of the loading platform portion 77 is transmitted to the carry-out control member 23, and the carry-out control member 23 is in the carry-out restriction release posture. Be made.

That is, as shown in FIGS. 17 and 18, as each loading platform portion 77 is pushed into the corresponding accommodating portion 26, the roller of the carry-out restricting member 23 is provided by the inclined surface 84 and the horizontal plane 83 on the lower surface of the loading platform portion 77. 82 is pressed downward. By this pressing, as shown in FIG. 19, the carry-out restriction member 23 is tilted to be in the carry-out restriction release posture. In the carry-out restriction release posture, the portion of both locking pins 25 that was located in the carry-out route of the actual box 16 retracts downward from the carry-out route. Therefore, the actual box 16 on the carry-out conveyor 22 can be moved to the trolley 75.

Further, as shown in FIG. 18, when each loading platform portion 77 is pushed into the corresponding accommodating portion 26, each folding member 85 in an upright posture protrudes into the carrying-out path of the actual box 16 by the carrying-out conveyor 22. The part (upper part) is the actual box 16. The foldable member 85 receives a force for tilting the foldable member 85 from the actual box 16 hit by the foldable member 85. As shown in FIG. 19, in each tilting member 85 in the standing posture, the portion above the shaft 86 tilts forward. Due to this tilt, each retractable member 85 retracts from the carry-out path of the actual box 16. Therefore, each foldable member 85 is less likely to be an obstacle to pushing each loading platform portion 77 into the accommodating portion 26, and each loading platform portion 77 can be accommodated in the corresponding accommodating portion 26.

As shown in FIG. 20, when each folding member 85 moves to the rear of the rearmost actual box 16 on the carry-out conveyor 22 by pushing each loading platform portion 77 into the accommodating portion 26, the folding member 85 is moved to the rear. The force that tries to tilt this is not received from the actual box 16. Each foldable member 85 is in an upright posture due to the weight balance around the shaft 86. As described above, each foldable member 85 is restricted from tilting backward with respect to the shaft 86 in the foldable member 85 in an upright posture. Further, in the standing posture, at least the upper end of each foldable member 85 projects into the carry-out path of the actual box 16.

Therefore, when the trolley 75 is moved forward and each loading platform portion 77 is pulled out from the corresponding accommodating portion 26, the actual box on the carry-out conveyor 22 is provided by the collapsible member 85 that moves together with the loading platform portion 77. 16 is pushed forward. The actual box 16 is transferred from the carry-out conveyor 22 to both loading platforms 77 of the trolley 75. When the entire loading platform portion 77 is pulled out from the accommodating portion 26, all the actual boxes 16 on the carry-out conveyor 22 are transferred to the trolley 75. In this way, by simply moving the loading platform 77 forward, it is possible to transfer the actual boxes 16 stacked in two stages on the carry-out conveyor 22 to the trolley 75, and the transfer work can be performed efficiently and easily. be able to.

Due to the weight of the actual box 16, the downward force does not act on the box mounting table 27 in which the actual box 16 is sent out to the carry-out conveyor 22. While the weight 41 receives resistance from the liquid 45, it slides downward in the cylinder 44 due to its own weight, and the weight 37 moves downward, so that the box mounting table 27 is raised as shown in FIG.

At this time, in the variable resistance mechanism 46, the valve body 49 moves upward from the valve seat member 48, and the liquid 45 easily flows through the communication hole 48a. The resistance that the weight 41 receives from the liquid 45 is reduced by that amount. In this way, the resistance that the weight 41 receives from the liquid 45 when the weight 41 slides downward when the box mounting table 27 rises is when the weight 41 slides upward when the box mounting table 27 descends. The weight 41 is smaller than the resistance received from the liquid 45.

Therefore, the weight 41 is more likely to slide downward in the cylinder 44 than when the resistance received from the liquid 45 is the same when the weight 41 slides upward and when it slides downward. Therefore, the box mounting table 27, which is connected to the weight 37 via the cable 38 and the pulley 39, is connected to the weight 41 via the first cable 42 and the first pulley 43, and the actual box 16 is sent out, is used. Can be raised faster.

When the box mounting table 27 rises, the driven member 68, the first receiving portion 51, and the second receiving portion 52 also rise together with the box mounting table 27. The rise of the second receiving portion 52 and the first receiving portion 51 means that when they pass behind the stopper 55, the stopper 55 is held at the two thick points shown in FIG. 3 from the holding posture shown by the solid line in FIG. It is performed by tilting to the tilted posture indicated by the chain line. When the second receiving portion 52 and the first receiving portion 51 pass behind the stopper 55, the stopper 55 is returned from the tilted posture to the holding posture.

The cable 34 is pulled as the box mounting table 27 rises. Then, as shown in FIG. 16, when the box mounting table 27 rises to the receiving position, the cable 34 becomes tense. The rear end portion of the mounting portion 31 is pulled diagonally forward and downward to be in the empty box receiving posture. The ascending of the box mounting table 27 is stopped, and the box mounting table 27 is held at the receiving position.

Further, the driven member 68 presses the third cable 67 as the box mounting table 27 rises, and switches the movement restricting member 63 to the movement restricting release posture shown in FIG. 4B at the receiving position. In the movement restriction release posture, the locking pin 66, which had been located in the carry-in route until then, retracts downward from the carry-in route. Of the empty boxes 15 on the carry-in conveyor 21, those whose movement has been restricted by the rear locking pin 66 move from the carry-in conveyor 21 to the box mounting table 27 by their own weight. When the empty box 15 is placed on the mounting portion 31, the box transport device 10 returns to the reference state shown in FIG. 1 described above. Therefore, the worker P1 does not have to hold the empty box 15 on the carry-in conveyor 21 and place it on the mounting portion 31.

Further, at this time, since the empty box receiving posture is adopted so that the mounting portion 31 is inclined so as to be lower toward the rear side, the empty box 15 can easily move from the carry-in conveyor 21 to the mounting portion 31.
Further, in the movement restriction release posture, the front locking pin 65 enters the carry-in route. Therefore, among the empty boxes 15 on the carry-in conveyor 21, those located in front of the front locking pin 65 are restricted from moving backward by the front locking pin 65.

Here, when the movement restricting member 63 swings, as shown in FIG. 4B, the driven member 68 presses the intermediate portion of the third cable 67 in the length direction. Therefore, at this time, both side portions in the length direction of the third cable 67 are pressed around the portion where the driven member 68 comes into contact with the third cable 67. Therefore, the movement restricting member 63 can be efficiently swung by pulling the third cable 67 by an amount larger than the movement amount of the driven member 68.

By the way, when the article 11 to be boxed is switched to the article 11 which is heavier than before, the weight of the article 11 added to the box mounting table 27 increases. Therefore, in the conventional box transport device in which the weight is simply connected to the box mount via a cable and a pulley, the box mount may be lowered quickly, which may affect the quality of the boxed article.

However, in the present embodiment in which the weight 41 is slidably housed in the cylinder 44 in which the liquid 45 is stored, the liquid 45 has resistance when the weight 41 slides upward and the mounting portion 31 descends. Will be. Moreover, at this time, by restricting the liquid 45 from flowing through the communication hole 48a of the valve seat member 48 by the valve body 49, the resistance that the weight 41 receives from the liquid 45 increases.

Therefore, when the box mounting table 27 descends from the receiving position to the upper boxing position and when descending from the upper boxing position to the sending position, the box mounting table 27 can be lowered more slowly than the conventional box transport device. can. It is possible to suppress the influence on the quality of the boxed article 11 due to the rapid descent of the box mounting table 27.

According to this embodiment, the following effects can be obtained in addition to the above items.
When the liquid 45 (water and oil) is stored in the cylinder 44 shown in FIG. 1, the oil having a specific density smaller than that of water floats on the water. This oil regulates the contact of air with water. Therefore, it is possible to regulate the evaporation of water in the cylinder 44 and suppress the phenomenon that the water decreases due to evaporation.

As shown in FIG. 7, the carriage 75 can be accommodated by arranging the loading platform 77 in the accommodating portions 26 formed on both sides of the carry-out conveyor 22 in the width direction. Therefore, it is not necessary to separately provide a storage space for the dolly 75.

When each loading platform portion 77 is accommodated in the corresponding accommodating portion 26, the grip portion 76 is located near the front of the carry-out conveyor 22. The restraint bar 69 is tilted downward as shown by the solid line in FIG. 7, and is locked to the grip portion 76. By this locking, the grip portion 76 can be restrained and the forward movement of the carriage 75 can be restricted.

A box mounting table 27 is provided between the carry-in conveyors 18 and 21 and the carry-out conveyor 22 shown in FIG. 1, and the upward force of the box mounting table 27 by the weights 37 and 41 and the weight of the box mounting table 27 itself. And it is moved up and down by the downward force due to the weight of the actual box 16 and the like. Therefore, the box transfer device 10 can be configured by an inexpensive mechanism that does not use power means.

Further, since the actual boxes 16 are stacked in two stages, the actual boxes 16 can be efficiently transported.
-The carry-out conveyor 22 is arranged below the carry-in conveyors 18 and 21. Then, the actual box 16 is carried out by the carry-out conveyor 22 in the direction opposite to the carry-in direction (front → rear) of the empty box 15 by the carry-in conveyors 18 and 21 (rear → front). Therefore, the dimensions of the box transport device 10 in the front-rear direction can be reduced, and the installation space of the entire box transport device 10 can be reduced.

-Since the roller conveyors are used as the mounting portions 31 of the carry-in conveyors 18, 21, the carry-out conveyor 22, and the box mounting table 27, the empty box 15 and the actual box 16 can be smoothly moved without delay.

Even when each loading platform portion 77 is not accommodated in the corresponding accommodating portion 26, the actual box 16 can be stored on the carry-out conveyor 22 by the locking pin 25 of the carry-out restricting member 23.

It should be noted that the above embodiment can also be implemented as a modified example in which this is modified as follows.
-If necessary for line organization, the carry-out conveyor 22 is installed in front of the moving direction of the empty box 15 by the carry-in conveyor 21 instead of the lower part of the carry-in conveyor 21, and the actual box 16 is the same as the carry-in direction of the empty box 15. It may be carried out in the direction.

The carry-out conveyor 22 may be installed so as to extend in a direction different from that of the carry-in conveyors 18 and 21, provided that it is below the carry-in conveyor 21.
A sliding plate may be used instead of the roller conveyor as at least one of the loading conveyors 18, 21, the loading conveyor 22, and the mounting portion 31 of the box mounting table 27.

-The weight 37, the cable 38, and the pulley 39 may be omitted as a means for applying an upward force to the box mounting table 27.
Further, as the above means, a spring balancer may be added. The spring balancer includes a case, a drum rotatably supported in the case around which the wire rope is wound, and a spring that urges the drum in the direction of rotation in which the wire rope is wound. In the spring balancer, when the tensile force on the wire rope exceeds a predetermined value, the wire rope is pulled out from the case against the urging force of the spring, and when the tensile force falls below the predetermined value, the wire rope is brought into the case by the urging force of the spring. It is rewound inside.

The spring balancer having the above configuration is arranged above the box mounting table 27, for example. Then, the wire rope in the spring balancer is connected to the box mounting table 27.
-The number of empty boxes 15 and actual boxes 16 loaded at one time on the mounting portion 31 of the box mounting table 27 may be changed to 1 or 3 or more.

When the above number is one, the second receiving portion 52 may be omitted.
When the number is three or more, a new receiving portion is provided between the first receiving portion 51 and the second receiving portion 52 in the box mounting table 27.

-Only water may be used as the liquid 45. Further, as the liquid 45, a liquid different from water and oil may be used.
The valve seat member 48 in the variable resistance mechanism 46 may be fixed to the shaft 47 above the lower end of the shaft 47.

-When the trolley 75 is not used, each loading platform portion 77 may be accommodated in the corresponding accommodating portion 26 even before the boxing work is performed.
When the foldable member 85 takes an upright posture, not only the upper end portion but also the portion including the upper end portion of the foldable member 85 may be projected to the carry-out path of the actual box 16 by the carry-out conveyor 22. ..

10 ... Box transport device, 11 ... Article, 15 ... Empty box, 16 ... Actual box, 18, 21 ... Carry-in conveyor, 22 ... Carry-out conveyor, 23 ... Carry-out control member, 24, 54, 86 ... Shaft, 26 ... Storage unit , 27 ... Box mounting table, 31 ... Mounting part, 33 ... Posture switching mechanism, 41 ... Weight, 42 ... First cable, 43 ... First pulley, 44 ... Cylinder, 45 ... Liquid, 46 ... Resistance variable mechanism, 47 ... shaft, 48 ... valve seat member, 48a ... communication hole, 49 ... valve body, 51 ... first receiving portion, 52 ... second receiving portion, 53 ... starting lever, 55 ... stopper, 61 ... second cable, 62 ... 2nd pulley, 63 ... movement control member, 67 ... 3rd cable, 68 ... driven member, 75 ... trolley, 77 ... loading platform, 81 ... transmission mechanism, 85 ... foldable member, W1, W2 ... width.

Claims (10)

A box provided so as to be able to move up and down between the receiving position for receiving the empty box carried in by the downhill carry-in conveyor and the sending position for sending the actual box in which the article is packed in the empty box to the downhill carry-in conveyor. The stand and
Cables and pulleys are slidably arranged vertically in the cylinder in which the liquid is stored, and slide upward when the box mount is lowered, and slide downward when the box mount is raised. With a weight connected to the box mount via
The carry-out conveyor has a width narrower than the width of the empty box and the actual box.
The actual box delivered from the box mounting table to the carry-out conveyor at the delivery position is conveyed in a state where both sides of the actual box in the width direction are projected from the carry-out conveyor.
A trolley for carrying out the actual box on the carry-out conveyor is further provided.
The trolley is provided with a pair of loading platforms extending along the transport direction of articles by the unloading conveyor in a state of being separated from each other in the width direction of the unloading conveyor.
By accommodating the loading platform portion in the accommodating portions formed on both side portions in the width direction of the unloading conveyor, the box transport located below both side portions of the actual box on the unloading conveyor in the width direction . Device. A resistance variable mechanism that reduces the resistance that the weight receives from the liquid when the weight slides downward when the box mounting table is raised as compared with the case where the weight slides upward when the box mounting table is lowered. The box transport device according to claim 1, further comprising. The variable resistance mechanism is
The shaft hanging from the weight and
A valve seat member fixed to the shaft and having a communication hole penetrating in the vertical direction,
The box transport device according to claim 2, further comprising a valve body movably arranged in the vertical direction between the weight and the valve seat member. The box transport device according to any one of claims 1 to 3, wherein water and oil are used as the liquid. When the cable is the first cable and the pulley is the first pulley,
A receiving portion provided on the box mounting table and raised and lowered together with the box mounting table, and a receiving portion.
A start lever that is supported by a shaft and tilts with the shaft as a fulcrum when operated.
The box mounting table is connected to the activation lever via a second cable and a second pulley, and a part of itself is located in the elevating path of the receiving portion to receive the receiving portion from below. It is provided with a stopper that at least tilts between a holding posture for holding the head in the receiving position and a holding / releasing posture for releasing the holding by retracting a part of the lifting path from the elevating path.
The stopper takes a holding posture when the starting lever is not operated, and when the starting lever is operated, the tilt of the starting lever is transmitted via the second cable and the second pulley, so that the holding posture is taken. The box transport device according to any one of claims 1 to 4, wherein the posture can be switched to the holding release posture. The empty box transported by the carry-in conveyor is configured to be stackable on the actual box mounted on the box mounting table.
An upper boxing position is set at a position lower than the receiving position by the height of the empty box.
When the receiving portion is used as the first receiving portion, the second receiving portion is provided at a position higher than the first receiving portion by the height of the empty box in the box mounting table.
By taking the holding posture, the stopper is in a state in which a part of the stopper is located in the elevating path to receive the second receiving portion from below, and the empty box is stacked on the actual box. The box transport device according to claim 5, wherein the box mounting table is held at the upper box packing position, and by taking the holding release posture, a part of the box is retracted from the elevating path to release the holding. When the cable is the first cable and the pulley is the first pulley,
A movement control posture that is supported by a shaft and a part of itself is located in the carry-in path of the empty box by the carry-in conveyor and regulates the movement of the empty box from the carry-in conveyor to the box mounting table, and the above-mentioned one. A movement restricting member that swings between the movement restricting release posture that releases the restriction by retracting from the carry-in route, and a movement restricting member.
A third cable having one end fixed immovably and the other end connected to the movement restricting member,
Further provided with a driven member that is attached to the box mount and moves up and down together with the box mount to approach and separate from the third cable.
The movement restricting member is urged to the side that takes the movement restricting posture by the weight balance around the shaft.
The driven member according to any one of claims 1 to 6, wherein the driven member presses the third cable as the box mounting table rises, and the movement restricting member is placed in the movement restricting release posture at the receiving position. Box transfer device. It is supported by the unloading conveyor by a shaft, and a part of itself is located in the unloading path of the actual box by the unloading conveyor to regulate unloading from the unloading conveyor, and a part of the unloading is performed. Further equipped with a carry-out control member that swings between the carry-out control release posture that lifts the restriction by retreating from the route.
The carry-out control member is urged to the side that takes the carry-out control posture by the weight balance around the shaft.
Between the unloading conveyor and the trolley, the movement of the loading platform portion when the loading platform portion is pushed into the accommodating portion is transmitted to the unloading restricting member, and the unloading restricting member is released from the unloading restriction posture. The box transport device according to any one of claims 1 to 7 , wherein a transmission mechanism is provided. A rod-shaped foldable member is supported by a shaft so as to be tiltable at the front end of each loading platform in the pushing direction with respect to the accommodating portion.
The foldable member is urged to the side that takes an upright posture extending in the vertical direction by the weight balance around the shaft.
When the foldable member takes the upright posture, at least the upper end portion of the foldable member protrudes into the carry-out path of the actual box by the carry-out conveyor.
Claim 1 to claim 1, wherein the foldable member is allowed to tilt backward in the pushing direction and is restricted from tilting forward in the foldable member in an upright posture. 8. The box transport device according to any one of 8 . In the box mounting table, the place where the empty box or the actual box is placed is composed of a mounting portion that is swingably supported by a shaft.
At the receiving position, the previously described placement portion is tilted so as to be lowered as it goes away from the carry-in conveyor, and at the delivery position, the previously described placement portion is tilted so as to be higher as it is away from the carry-out conveyor. The box transport device according to any one of claims 1 to 9 , further provided with a posture switching mechanism for setting the actual box delivery posture.

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