JPH0858937A - Vertical transporting conveyor - Google Patents

Abstract

PURPOSE: To carry out a soft and lightweight conveying article to be conveyed without damaging the article to be conveyed by reducing a loading load to be applied to the conveying article in a state where the conveying article is pinched by a main belt conveyor and a hold belt conveyor in relation to a vertical transporting conveyor. CONSTITUTION: A vertical conveying passage is constituted of a main belt conveyor 1 and a hold belt conveyor 2. Vertical conveying surfaces of both belt conveyors 1, 2 are faced to each other, and belts 11, 21 are connected to each other, and a belt 21 of the hold belt conveyor 2 is constituted of a belt member capable of extending and contracting in the longitudinal and lateral directions. Inextensible guide belts are provided along both end side edges, and a tension roller for energizing the guide belt outward from the inside of the belt 2 is provided along the guide belt 2, and a conveying article (d) is elastically pinched between both conveyors 1, 2 and vertically conveyed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical conveyor, and more particularly to a vertical conveyor that conveys small, soft and lightweight objects.

[0002]

2. Description of the Related Art Conventionally, there is, for example, Japanese Utility Model Publication No. 2-13366 as a vertical conveyor for vertically ascending or descending a horizontally conveyed object and then horizontally discharging it again. The above-described conveyor includes a main conveyor and a hold conveyor that are synchronously driven, and the transport surfaces of these two conveyors face each other to be close to each other, thereby forming a vertical transport surface. Also, the hold conveyor is
A number of reinforcing bands are attached in parallel along the back of the belt,
By providing a fold-like slack between these reinforcement bands,
The belt itself has an appropriate elasticity, and the conveyed product carried at the start of the conveyor is elastically sandwiched between the hold conveyor and the main conveyor, and the conveyed product is conveyed vertically in that state. I am doing it.

[0003]

However, since the above-mentioned conventional vertical conveyor is premised on vertically conveying a relatively large and heavy conveyed object, the hold conveyor itself is reinforced by the reinforcing belt. As a result, a strong elastic contraction force is generated, so that the load applied to the transport section is large. Therefore, when a small, soft and lightweight conveyed product, for example, a confectionery such as a snack or a packaged product is conveyed, the internal product or the pack may be crushed and damaged. Further, since the above-mentioned conveyor has a structure in which both sides of the main conveyor and the hold conveyor which are close to each other are opened, there is a possibility that a conveyed product may spill from both sides of the belt during vertical conveyance.

The object of the present invention is to reduce the load applied to the conveyed product in a state where the conveyed product is sandwiched between the main conveyor and the hold conveyor, and the sandwiching between both conveyors has a close adhesion to the vertical conveyor as described above. By providing a function that can be reliably performed, it is possible to reliably vertically convey a soft and lightweight object or a small and thin object to be conveyed without damage.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is a vertical method in which a conveyed product is carried in horizontally with respect to the starting end portion of a conveyor, then vertically moved up or down, and again carried out horizontally. In the transfer conveyor, the transfer path of the conveyor is configured by superimposing a main belt conveyor and a hold belt conveyor, and the vertical transfer surfaces of both belt conveyors are opposed to each other so that the belts are joined together and both belt conveyors are synchronized. A drive mechanism for rotationally driving in a state is provided, and the belt of the hold belt conveyor is configured by a belt material that can be expanded and contracted in the vertical and horizontal directions, and non-stretchable guide belts are attached along both side edges thereof, and, A guide pulley for supporting the belt from the inside is provided in the bent portion of the hold belt conveyor, and the guide groove is provided in the guide groove on the outer circumference of the guide pulley. Tighten the belt combined respectively engaged, it is a tension roller for biasing and toward the guide belt and hold the belt conveyor both side edge portions of each belt inside out be comprised provided at appropriate intervals along the guide belt.

In the above-described vertical conveyor, the main belt conveyor and the hold belt conveyor may be synchronously driven and rotated by a drive mechanism of one system. Further, the vertical conveyer, the main belt conveyor and the hold belt conveyor are held by independent body frames, respectively, by attaching the body frame of one conveyor to the body frame of the other conveyor detachably, It is preferable that the conveyor is configured so that it can be joined / separated.

[0007]

According to the above means, the main belt conveyer and the hold belt conveyer form the conveying path by making their vertical conveying surfaces face each other and joining the belts. The hold belt conveyor is composed of a belt material that can expand and contract in the vertical and horizontal directions, non-stretchable guide belts are attached along the both side edges, and this guide belt is a guide pulley provided in the bent portion of the hold belt conveyor. Have been suspended. Therefore, when the conveyed product is horizontally carried in to the start end portions of the main belt conveyor and the hold belt conveyor that are synchronously rotated by the drive mechanism, the conveyed product is sandwiched between the main belt conveyor and the hold belt conveyor. Ascend or descend along a vertical transport surface. In addition, if the conveyed product is sandwiched between both belt conveyors,
A belt that expands and contracts in the vertical and horizontal directions is closely contacted so as to wrap one side of the conveyed product, and due to this elastic contact, the conveyed product is sandwiched so as not to come off.

The guide belts attached to both side edges of the hold belt conveyor are constantly urged toward the outside of the belt by tension rollers provided at appropriate intervals along the belt. Therefore, as described above, when the conveyed product is clamped, the non-stretchable guide belt and the belt are not stretched even if both side edges of the hold belt conveyor are relaxed so as to be pulled inside the belt due to the sandwiched product. It is possible to maintain the tension in the belt width direction and prevent loosening by the tension rollers that urge the belts outward.

In the vertical conveyor according to the second aspect of the present invention, the main belt conveyor and the hold belt conveyor are driven and rotated in a synchronized state by a drive mechanism of one system. Further, in the vertical conveyor according to the third aspect, the main belt conveyor and the hold belt conveyor are held by independent main body frames. Then, by assembling the main body frame of one conveyor to the main body frame of the other conveyor, both belt conveyors are integrated to form a vertical transfer conveyor having a vertical transfer surface.
Further, by separating the integrated main body frames from each other, both conveyors are separated independently.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. The vertical conveyor shown in FIGS. 1 to 5 vertically elevates a conveyed object d that is horizontally carried in with respect to the lower end of the conveyor, and horizontally carries it out again at the upper end of the conveyor. 1 and the hold belt conveyor 2 are overlapped and joined in a state where the belts 11 and 21 face each other, so that the horizontal conveyance surface a1 that is the lower end of the conveyor, the vertical conveyance surface a2, and the horizontal conveyance that is the upper end of the conveyor. The surface a3 is configured to be rotationally driven by the drive mechanism 3 in a state in which the above belt conveyors 1 and 2 are synchronized with each other.

The main belt conveyor 1 and the hold belt conveyor 2 have independent frames 5 and 6, respectively. By assembling the frame 5 of the main belt conveyor 1 to the frame 6 of the hold belt conveyor 2, Both conveyors 1 and 2 are detachably integrated. The frame 6 of the hold belt conveyor 2 is configured by connecting a plate-shaped upper frame 63 and a lower frame 61 to both upper and lower ends of a vertical frame 62 formed in a vertically long shape. 21 and the rollers are attached and supported in a sandwiched manner. Further, the frame 62 of the hold belt conveyor 2 is vertically supported on the base 4, and stands on its own as shown in FIG. Belt 2
The configurations of 1 and the rollers will be described later. On the other hand, the frame 5 of the main belt conveyor 1 is configured by connecting a plate-shaped upper frame 53 and a plate-shaped lower frame 51 to the upper and lower ends of a pair of left and right vertically elongated frames 52, respectively.

The frame 5 of the main belt conveyor 1
The upper and lower frames 53, 51 are fitted inside the upper and lower frames 63, 61 of the hold belt conveyer 2 while the long side is joined to the vertical frame 62 of the hold belt conveyer 2. Next, between the pair of left and right frames 51 and the frame 53
The horizontal connecting members 51a and 53a installed between the two are connected to each other by the horizontal connecting members 61a and 6a installed between the frames 61 and 63.
The conveyors 1 and 2 are detachably integrated by fastening bolts 14a and 14b to 3a, respectively (FIGS. 1 and 8).

As described above, the main belt conveyor 1 and the hold belt conveyor 2 are independent frames 5 and 6, respectively.
The belt conveyors 1 and 2 are independent from each other by assembling and disassembling the frames 5 and 6 by holding and holding the frame 5 of the conveyor 1 to the frame 6 of the conveyor 2 in a detachable manner. It can be assembled / separated as it is. Thereby, for example, the belt 1
It is possible to greatly improve the workability when performing maintenance of the rollers 1, 21 and each roller portion. In the above embodiment, the frame 52 of the main belt conveyor 1 is assembled to the frame 62 of the hold belt conveyor 2 which is self-supporting. On the contrary, the frame 52 is self-supporting and Alternatively, the frame 62 may be assembled.

The main belt conveyer 1 is a belt conveyer which constitutes a substantially crank-shaped conveying path consisting of a horizontal conveying surface a1 at the lower end of the conveyor, a vertical conveying surface a2, and a horizontal conveying surface a3 at the upper end of the conveyor. Rollers 12a and 12b are arranged at the lower end of the conveyor, and a set of five rollers 12c forming an arc of a belt bending portion at the upper end of the conveyor.
And a roller 12d, and these rollers 12a-1
By winding the non-stretchable endless belt 11 along the outer periphery between the 2d, the above-mentioned substantially crank-shaped conveying surface is formed. As described above, the main belt conveyor 1 uses a non-stretchable one such as a non-stretchable synthetic resin belt. However, the non-stretchability means the hold belt conveyor 2 described later.
It means that the elastic belt 21 hardly extends as compared with the elastic belt 21. Therefore, although the belt that does not extend as much as possible is selected and used, in reality, it slightly extends. Non-slip is formed by continuously forming small irregularities on the surface of the endless belt 11. In addition, the endless belt 11
A guide convex portion 11a is provided around the center of the back surface of the end portion of the end plate, and the guide convex portion 11a is fitted into a guide groove 15a recessed along the center of the surface of a guide plate 15, which will be described later. The meandering of the belt 11 is prevented. Furthermore, by providing relatively low crosspieces protruding at an appropriate pitch along the surface of the endless belt 11, it is possible to further improve the slip prevention effect of the conveyed product. As shown in FIGS. 4 and 5, the rollers 12a to 12d are pivotally supported between the upper frames 53 of the frame 5 and between the lower frames 51. A driving roller 12 and rollers 12f and 12g are provided on the upper portion of the main belt conveyor 1, and the belt 11 is detoured in a meandering manner to each of these rollers (FIG. 3). Further, the belt 11 corresponding to the section of the vertical conveyor surface a2 of the main belt conveyor 1
A guide plate 15 is provided on the inner side, and the belt 11 is configured to be rotationally driven along the plane of the guide plate 15.

The hold belt conveyer 2 constitutes a vertical conveying surface a2 by being joined to the belt 11 of the main belt conveyer 1, and has rollers 22a, 22b and a pair of left and right guides at the bent portion at the lower end of the conveyer. By arranging the pulley 23a, arranging the roller 22c and the roller 22d at the bent portion at the upper end of the conveyor, and winding the telescopic belt 21 along the outer circumference between the rollers 22a to 22d and the guide pulley 23a. , Which constitutes a substantially crank-shaped conveying surface that is in close contact with the vertical conveying surface a2 of the main belt conveyor 1. That is, the vertical transport surface a2 of the vertical transport conveyor is configured by joining the belt 21 of the hold belt conveyor to the belt 11 of the main belt conveyor 1. In addition, the conveyance surface formed between the belts 11 and 21 can be opened and closed at both upper and lower ends of the vertical conveyance surface a2 in the carry-out direction and the carry-in direction, so that the carried object d can be caught and discharged without difficulty. It is configured as follows. Each of the rollers 22a to 22d and the guide pulley 23a described above
Is pivotally supported between the upper frame 63 and the lower frame 61 of the frame 6, as shown in FIGS. Further, a pair of guide pulleys 23b corresponding to the guide pulley 23a at the lower end of the conveyor is attached and fixed to both ends of the roller 22d at the upper end of the conveyor.
It is configured to rotate integrally with.

The elastic belt 21 of the hold belt conveyor 2 is composed of a bidirectional elastic belt made of a woven fabric which can be stretched in the longitudinal and transverse directions, and as shown in FIG.
When the conveyed article d is sandwiched between the vertical conveyor surfaces a2 formed between the conveyors 1 and 2, the elastic belt 21 is elastically adhered so as to wrap one side of the conveyed article d, and
It is configured such that the article d is sandwiched between the two. still,
The elastic belt 21 may have any structure as long as it can appropriately expand and contract in the vertical and horizontal directions.
For example, a rubber belt having appropriate elasticity may be used. As shown in FIGS. 4 and 5, non-stretchable guide belts 24 are provided along the inner surface sides of both side edges of the belt 21 of the hold belt conveyor 2.

The non-stretchable guide belt 24 is the belt 2.
The strip-shaped portion 24a fixed to both side edge portions of No. 1 and the guide grooves 23a ', 23b' of the above-described guide pulleys 23a, 23b.
And a belt portion 24b that engages with. The guide belt 24 has a belt portion 24b and a guide pulley 23.
engage with the guide grooves 23a ', 23b' of a, 23b,
Guide the side edges of the belt 21 at the bent portion of the belt. As shown in FIG. 1, FIG. 2, and FIG. 3, tension rollers 7 are provided at appropriate intervals in the vertical bending portion and the vertical portion of the hold belt conveyor 2. The tension roller 7 urges the guide belts 24 on both sides of the belt 21 of the hold belt conveyor 2 from the inner side to the outer side of the belt 21, thereby tensioning the belt 21 in the width direction.

As shown in FIG. 6, the tension roller 7
Are provided in pairs on both sides of the belt 21. The tension roller 7 has a roller 71 that comes into contact with the side surface of the guide belt 24 inside the belt 21. The roller 71 is rotatably supported by a support plate 72, the support plate 72 is fixedly attached to one end of a slide shaft 73, and the slide shaft 73 is inserted into a guide hole 74 a formed in a support member 74. Insert it freely. The support member 74 is mounted and supported on a mounting frame 65 that stands upright along the frame 6 of the hold belt conveyor 2. A coil spring 75 is elastically mounted at the rear end of the sliding shaft 73 fitted into the guide hole 74a of the support member 74 to urge the sliding shaft 73 and the roller 71 toward the outside of the belt 21. . Therefore, the belt 21 is applied with tension in the belt width direction by the pair of tension rollers 7 provided on both sides of the belt 21. Therefore, when the conveyed article d is sandwiched between the belts 11 and 21 as the belts 11 and 21 are driven to rotate, both sides of the belt 21 are slackened so as to be pulled inward by the sandwiching of the conveyed article d. However, the tension of the non-stretchable guide belt 24 and each tension roller 7 that urges the belt 24 outward can be prevented.

The main belt conveyor 1 and the hold belt conveyor 2 described above are synchronously rotated by a drive mechanism 3 of one system provided at the upper end of the conveyor. The drive mechanism 3 is
It has one drive motor 31. The drive motor 31 is attached and fixed to the upper frame 63 of the hold belt conveyor 2, and the drive sprocket 32 is attached to the output shaft 31a protruding outside the frame 63. Further, sprockets 33, 35 are attached to the support belt conveyor 2 upper roller 22d and the main roller conveyor 1 upper drive roller 12e, respectively, at the spindle end portions thereof.
An endless chain 36 is stretched over 33 and 35. still,
A tension sprocket 34 is provided at an intermediate portion of the chain 36 so that the chain 36 is given an appropriate tension. That is, the drive mechanism 3 transmits the drive of the drive motor 31 through the chain 36 to rotate the two conveyor belts 1 and 2 for driving the rollers 22d and 12e at a predetermined speed so that the two conveyor belts 1 and 2 are moved. Rotate and drive in a synchronized state. By the above drive, the main belt conveyor 1 rotates left in FIG. 1, and at the same time, the hold belt conveyor 2 rotates right. And both conveyors 1 and 2
Keeps the belts 11 and 21 joined to each other on the vertical conveyance surface a2, and rotates synchronously without any deviation from each other.

Next, the operation of the vertical conveyor constructed as above will be described. A carry-in conveyor b and a carry-out conveyor c are connected to the lower end and the upper end of the above-described vertical conveyor, respectively. The conveyed product d, which is placed on the carry-in conveyor b and conveyed horizontally, is carried in on the horizontal conveyance surface a1 at the lower end of the vertical conveyance conveyor, and immediately after that, the main belt conveyor 1 and the hold belt conveyor 2 which rotate in synchronization with each other. At the same time as it enters the space, it passes between a pair of guide pulleys 23 provided at intervals in the belt width direction and is sandwiched between the belts 11 and 21 of both conveyors 1 and 2 (FIG. 4). ). When the conveyed product d is sandwiched between the conveyors 1 and 2, the belt 21 of the hold belt conveyor 2 which expands and contracts in the vertical and horizontal directions closely adheres so as to wrap one side of the conveyed product d, and the adherence prevents the conveyed product d from shifting. Sandwiched between. The conveyed object d sandwiched between the two conveyors 11 and 21 that rotate synchronously in this manner rises vertically along the vertical conveying surface a2.

Further, when the article d is sandwiched between the two belts 11 and 21, non-stretchable guide belts 24 attached to both side edges of the hold belt conveyor 2 are provided at appropriate tension rollers. It is always urged by 7 toward the outside of the belt. Therefore, when sandwiching the conveyed object d,
When the belt 21 is stretched, it tries to relax so that both side edges of the belt 21 are pulled inward, but the tension of the non-stretchable guide belt 24 and the tension roller 7 pulls the belt 24 to the outside of the belt. By maintaining the reaction force, this slack can be prevented and the conveyed article d can be closely adhered so as to be wrapped by the elastic belt 21.

The conveyed object d that has risen to the upper end of the vertical conveying surface a2 passes through the bent portion of the upper end portion where the belts 11 and 21 of the two conveyors 1 and 2 separate from each other, and from the sandwiched state to the upper horizontal conveying surface a3. Is discharged. The transported object d moves from the horizontal transport surface a3 to the unloading conveyor c and is transported horizontally again. In the vertical conveyer configured as described above, since the conveyed product d can be flexibly clamped between the main belt conveyer 1 having a non-stretchable belt and the hold belt conveyer 2 capable of stretching in the vertical and horizontal directions, It is possible to effectively reduce the load applied to the conveyed product d during vertical conveyance, and damage the contents of the product even if it is a soft and lightweight substance such as snacks or pack packaging, or a small and thin conveyed substance. It can be reliably transported without causing it. Further, since both the conveyors 1 and 2 constituting the transport path are belt conveyors, noise is small, and the installation space of the apparatus can be reduced. In the above-described vertical conveyor, both conveyors 1 and 2 are synchronously rotated by the drive mechanism of one system. However, both conveyors 1 and 2 may be individually provided with a drive mechanism, and the conveyors 1 and 2 are rotated individually. The drive may be performed to synchronize the rotation.

In the vertical conveyor shown in FIG. 7, the main belt conveyor 1 and the hold belt conveyor 2 are rotationally driven by the drive mechanism 3 at the same time as the above-described one, and at the same time, the main belt conveyor 1 is driven by the auxiliary drive mechanism 30. Is provided. The auxiliary drive mechanism 30 is for preventing the belt 11 from slackening and causing meandering when the vertical conveying surface of the conveyor becomes long.
8 is provided with two rollers 39a and 39b, and the belt 11 is tensioned by detouring the belt 11 between the rollers 38, 39a and 39b in a meandering manner. The drive roller 38 and the drive motor 37 are connected to each other by a chain 37a. By driving the drive motor 37 to rotate the drive roller 38, tension is applied to the belt 11 and at the same time the drive force is supplemented. Given to
The belt 11 is rotationally driven by the cooperation of the upper driving roller 12e. In this case, the driving roller 12e
It goes without saying that the rotational drive speeds between the positions 38 and 38 are matched.

Further, in the above-mentioned embodiment, both the main belt conveyor 1 and the hold conveyor 2 are synchronously driven and rotated by the drive mechanism 3 of one system. However, only the main belt conveyor 1 is rotationally driven by the drive mechanism to drive the belt 21. Belt 1
It is also possible to transmit the driving rotation from the main belt conveyor 1 to the freely rotatable hold conveyor 2 and to rotate the main belt conveyor 1 and the hold conveyor 2 synchronously by utilizing the fact that they are in close contact with 1. is there. Further, as means for completely synchronizing the main belt conveyor 1 and the hold belt conveyor 2, the belts 11,
Along the both side edges of 21, a belt-shaped engaging body that is attached and detached by engaging the male body and the female body, for example, a velvet fastener or an engaging device by fitting a large number of concavo-convex bodies may be attached to the belt shape. . According to this, in the range in which the belts 11 and 21 of both conveyors 1 and 2 are joined on the vertical transport path a2, the male body and the female body described above are engaged and joined so that the belts 11 and 21 are not displaced from each other. However, the two belt conveyors 1 and 2 can be perfectly synchronized with each other, and the adhesion between both side edges of both belts 11 and 21 can be improved (not shown).

[0025]

As described above, according to the present invention, the main belt conveyor and the hold belt conveyor constituted by the belt material which expands and contracts in the vertical and horizontal directions face each other and are joined to each other to form a vertical conveying surface and convey the same. Since it is elastically adhered to the item so that it can be stretched vertically and horizontally, it can be flexibly clamped between the main belt conveyor and the hold belt conveyor. The load applied to can be effectively suppressed.
As a result, even if the conveyed product is a soft and lightweight product such as a snack or a packed package, or a small and thin product, it can be conveyed vertically without damaging the product.

Further, since non-stretchable guide belts are provided along both side edges of the hold belt conveyor and the guide belts are urged toward the outside of the belt by the tension rollers, the conveyed object is pinched. At this time, both side edges of the hold belt conveyor can be prevented from being pulled inward and loosening. As a result, it is possible to effectively maintain the gripping force obtained by tightly wrapping a stretchable belt around the conveyed item, and to prevent slippery conveyed items from passing through gaps on both sides of the belt during vertical conveyance. Problems such as spillage can be prevented.

In the case where the main belt conveyor and the hold belt conveyor are synchronously driven and rotated by the drive mechanism of one system, both belt conveyors can be synchronously driven and rotated by the minimum necessary driving mechanism, which simplifies the structure. It is possible to reduce the size of the device.

Further, in the case where the main belt conveyor and the hold belt conveyor are held by independent main body frames, and the main body frame of one conveyor is detachably assembled to the main body frame of the other conveyor, both conveyors are By assembling and disassembling the main body frames to be held, both belt conveyors can be joined / separated in an independent state, so that the conveyor can be easily assembled and disassembled, and the workability of maintenance is greatly improved. Can be improved.

The above-mentioned vertical conveyor may be configured so that the conveyed object carried in from the upper end is vertically lowered and is horizontally carried out from the lower end.

[Brief description of drawings]

FIG. 1 is a side view showing a vertical conveyor according to the present invention.

FIG. 2 is a vertical sectional side view showing a lower end portion of the conveyor.

FIG. 3 is a vertical sectional side view showing an upper end portion of the conveyor.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a side view showing a vertical conveyor having an auxiliary drive mechanism provided below the main belt conveyor.

FIG. 8 is a side view showing a state in which the main belt conveyor and the hold belt conveyor are separated.

[Explanation of symbols]

 1 ... Main belt conveyor 2 ... Hold belt conveyor 3 ... Drive mechanism 5 ... Frame (main belt conveyor) 6 ... Frame (hold belt conveyor) 7 ... Tension roller 23 ... Guide pulley 24 ... Guide belt

Claims (3)

[Claims] 1. A vertical conveyor that conveys a conveyed object horizontally to a conveyor start end portion, vertically elevates or lowers the conveyed object, and then conveys the conveyed object horizontally again, wherein a conveyor path of the conveyor is a main belt conveyor and a hold belt conveyor. And configured to overlap, and to join the belts by facing each other vertical transport surface of these belt conveyors,
A drive mechanism for rotating both belt conveyors in a synchronous state is provided, and the belt of the hold belt conveyor is composed of a belt material that can be stretched in the vertical and horizontal directions, and non-stretchable guide belts are provided along both side edges thereof. Guide pulleys that are additionally provided and support the belt from the inside are provided at the bent portions of the hold belt conveyor, and the guide belts are engaged with the guide grooves on the outer circumference of the guide pulley, and both sides of the hold belt conveyor are engaged. A vertical transport conveyor comprising tension rollers for urging the guide belts from the inside to the outside of the belts at appropriate intervals along the guide belts. 2. The vertical conveyor according to claim 1, wherein the main belt conveyor and the hold belt conveyor are synchronously driven and rotated by a drive mechanism of one system. 3. A main belt conveyor and a hold belt conveyor are held by independent main body frames, and the main body frame of one conveyor is detachably assembled to the main body frame of the other conveyor, thereby joining both belt conveyors. / The vertical conveyor according to claim 2 or 3, which is configured to be separable.