JP2008297038A - Carrying belt tensioning device for freezer with conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrying belt tensioning device having no concern of freezing even if applied and used for the inside of a freezer with a conveyer, simplifying a structure, not requiring work such as complicated maintenance, and capable of smoothly moving a tensioning roller in a vertical direction. <P>SOLUTION: The carrying belt tensioning device for the freezer with the conveyer is equipped with the tensioning roller leading out downward a part of the carrying belt through two sprockets disposed at an interval, and adjusting the extension of the carrying belt. The carrying belt tensioning device positioned both sides of the tensioning roller and used in the freezer with the conveyer is composed of two frames supporting both end portions of a top plate and a bottom plate, two pipes installed between the frames, and a guide rail installed to the pipe and having a generally C-shaped cross section. A main shaft is inserted between the pipes, and the tensioning roller is placed on a belt reciprocating portion. The guide rail is formed from super-high-molecular polyethylene, and the tensioning roller can slide in a vertical direction to the guide rail. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a conveying belt tensioning device for a conveying conveyor in a freezer with a conveyor capable of continuously putting products such as food into a freezer and taking out the products after completion of freezing.

  Conventionally, conveyor belt conveyors have been provided with a conveyor belt tensioning device for adjusting the extension of the conveyor belt to properly maintain tension. For example, a bearing member that rotatably supports the shaft portion of the driven pulley is guided by a slide frame fixed at a predetermined position so as to be slidable in the lateral direction as the conveying direction. It is attached to the end. The screw shaft is screwed into a fixing member provided at the end of the slide frame, and the driven pulley is moved in the lateral direction by rotating the screw shaft with a handle or the like attached to the other end of the screw shaft. Then, by moving the driven pulley, the loosened conveyor belt can be extended and held at an appropriate tension.

In addition, it is assumed that the driven pulley that supports the conveyor belt in the conveying direction is not moved, so that it does not require an installation area just enough to move, or the equipment and facilities following the belt conveyor are not moved,
A screw shaft disposed near the drive side of the transport belt along a direction substantially perpendicular to the transport direction of the transport belt, and a pair of snaps for bending the drive side portion of the transport belt in the orthogonal direction further away from the drive side A pulley, a bearing member that is slidably guided in the orthogonal direction by a guide member and engaged with an end portion of the screw shaft, and the shaft center portion is supported by the bearing member so that the screw shaft rotates. And an adjustment pulley that pulls the drive side portion of the conveyance belt bent by the snap pulley in the orthogonal direction by being moved in the orthogonal direction away from the drive side. Yes (see, for example, Patent Document 1).

Further, as shown in FIG. 6, a driving pulley and a driven pulley (not shown) provided at both ends, respectively, and an endless belt-like shape that can be placed on and transported from both pulleys. Some include a conveyor belt 3b and a tension roller 6 that guides the conveyor belt 3b downward via two holding pulleys (not shown) arranged with a gap. In this belt conveyor, a conveyor belt tensioning device 4 for pulling the conveyor belt 3b by weights 7 attached via locking portions 11 provided on both sides of the tension roller 6 to apply tension to the conveyor belt 3b. Is provided.
The conveyor belt tensioning device 4 is provided with two guide rails 9 installed upright and a take-up type bearing that is rotatably provided between the guide rails 9 and rotatably supports the rotary shaft 10a of the tension roller 6. 10 is a set, and these are provided on both sides of the tension roller 6 in the width direction. Note that fixed bases 12 are provided on both lower sides of the tension roller 6, and each guide rail 9 is fixed to the fixed base 12 (see, for example, Patent Document 2).
As a result, the bearings 10 on both sides of the rotary shaft 10a of the tension roller 6 move while being sandwiched between the guide rails 9 installed vertically, so that the movement of the tension roller 6 is given freedom only in the vertical direction. It has become.
JP-A-7-285636 Japanese Patent Laid-Open No. 2004-210447

  In the configuration as disclosed in Patent Document 1, even if the product such as food is continuously put into the freezer and the product is taken out after freezing and applied in a freezer with a conveyor, the screw shaft can be used. As a result, the belt is frozen and cannot be rotated, which causes a problem that tension cannot be properly maintained by adjusting the extension of the conveyor belt.

  Further, in the configuration as disclosed in Patent Document 2, when a product such as food is continuously put into a freezer and the product is taken out after freezing and used in a freezer with a conveyor, a bearing is used. The lubricating oil at 10 must be low temperature or non-lubricated. In this case, there is a concern about an increase in cost. In addition, there is a problem that the bearings 10 must be maintained and exchanged. Furthermore, each bearing 10 is sandwiched between two guide rails 9 due to deformation of the guide rails 9 and adhesion of dust. The tension roller 6 is likely to move up and down, which may cause meandering of the conveyor belt 3b.

  Therefore, the present invention solves such a problem, and a conveyor for a conveyor in a freezer with a conveyor, in which products such as food can be continuously put into a freezer and the products can be taken out after freezing is completed. Concerning a conveyor belt tensioning device, there is no risk of icing even if it is applied to a freezer with a conveyor. The structure is simplified and complicated maintenance is not required. It is an object of the present invention to provide a conveyor belt tensioning device for a conveyor for conveyance in a freezer with a conveyor.

  In order to solve the above problems, the conveyor belt tensioner for a freezer with a conveyor according to claim 1 of the present invention is configured such that a part of the conveyor belt is interposed between two sprockets arranged with a gap. In the conveyor belt tensioner for conveyor with a tensioner that is led downward and adjusts the extension of the conveyor belt, the conveyor freezer with a conveyor is located on both sides of the tension roller having the main shaft at both ends of the roller section. The conveyor belt tensioning device used inside has two frames that support both ends of the top plate and the bottom plate, two pipes installed between the frames, and a cross section that is mounted on the pipes. A guide rail having a substantially C-shape, the main shaft is fitted between the two pipes on which the guide rail is mounted, and the tension roller is moved backward on the conveyor belt. Placed above the guide rail is formed from ultra high molecular weight polyethylene, with respect to the vertical direction in the tensioning roller and the guide rail, it is characterized in that slidable.

  The conveyor belt tensioning device for a freezer with a conveyor according to a second aspect of the present invention is the conveyor belt tensioning device for a freezer with a conveyor according to the first aspect, wherein the outer arc portions of the two guide rails are abbreviated. It is characterized by being fitted into the pipe so as to confront the center position.

  A conveyor belt tensioner for a freezer with a conveyor according to a third aspect of the present invention is the conveyor belt tensioner for a freezer with a conveyor according to the first and second aspects, wherein the outer diameter of the main shaft and the conveyor belt tensioner The gap between the two pipes on which the guide rails are mounted is substantially the same.

A conveyor belt tensioning device for a freezer with a conveyor according to a fourth aspect of the present invention is the conveyor belt tensioning device for a freezer with a conveyor according to any one of the first, second and third aspects. A straight line portion is provided at a substantially central position of the outer circular arc portion.
(Function)

  In the invention relating to the conveyor belt tensioning device for a freezer with a conveyor according to the present invention, it has a substantially C-shape formed from ultra-high molecular polyethylene having impact resistance even at low temperatures, excellent wear resistance, and self-lubricating properties. Since the guide rail is mounted on the pipe, the main shaft of the tension roller is fitted and inserted at a predetermined interval in the guide rail, and the roller portion is installed on the belt returning portion, the inside of the freezer with conveyor However, the main shaft of the tension roller and the guide rail are not frozen, and can slide in the vertical direction of the guide rail, so that the tension roller can be smoothly moved up and down.

In the invention relating to the conveyor belt tensioning device for a freezer with a conveyor according to the present invention, it has a substantially C-shape formed from ultra-high molecular polyethylene having impact resistance even at low temperatures, excellent wear resistance, and self-lubricating properties. Since the guide rail is mounted on the pipe, the main shaft of the tension roller is fitted and inserted at a predetermined interval in the guide rail, and the roller portion is installed on the belt returning portion, the inside of the freezer with conveyor However, the main shaft of the tension roller and the guide rail are not frozen, and can slide in the vertical direction of the guide rail, so that the tension roller can be smoothly moved up and down. The belt return section can be bent downward by its own tension roller, and the extension of the conveyor belt is automatically adjusted. It is possible to hold the tension.
In addition, since only the ultra high molecular weight polyethylene is used for the guide rail, complicated work such as conventional maintenance when a bearing is used is not required, and the structure can be simplified.
Moreover, since the cross section of the guide rail is formed in a substantially C shape, it can be easily mounted on the pipe, and can be easily removed even when the guide rail is replaced.
Furthermore, since the structure has been simplified, it is possible to maintain the right and left balance of the main shaft in the tension roller only by the weight of the tension roller, so that the vertical movement of the left and right main shafts does not occur. Further, there is no possibility of causing the meandering of the conveyor belt.

  Furthermore, in the invention relating to the conveyor belt tensioning device for a freezer with a conveyor according to claim 3, the outer diameter of the main shaft and the gap between the two pipes on which the guide rails are mounted are substantially the same. The main shaft of the tension roller is sandwiched between the two pipes on which the guide rails are mounted, and the tension roller does not move, so there is no possibility of causing the tension roller to meander. This can also prevent the meandering of the conveyor belt.

  Furthermore, in the invention according to the conveyor belt tensioner for a freezer with a conveyor according to a fourth aspect, since the straight portion is provided at a substantially central position of the outer arc portion in the guide rail, the tension roller is more than the invention in the third aspect. The ground contact area of the two pipes on which the main shaft and the guide rail are mounted can be increased. Thereby, the tension roller can be pinched more stably.

  Hereinafter, a conveyor belt tensioning device for a conveyor for a freezer with a conveyor according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a partially simplified front view of a freezer 1 with a conveyor according to a first embodiment of the present invention cut in the longitudinal direction. FIG. 2 is a partially enlarged front view of the conveying belt tensioning device, the tensioning roller, and the belt backward movement portion in the freezer 1 with the conveyor according to the first embodiment of the present invention. 3A is an enlarged front view of a guide rail in the freezer 1 with a conveyor according to the first embodiment of the present invention, and FIG. 3B is a partially enlarged plan view of a conveying belt tensioning device, a tension roller, and a belt backward movement portion. FIG. 4 is a partially enlarged plan view of the conveyor belt tensioner, the tension roller, and the belt return portion after the tension roller slides in the freezer 1 with the conveyor according to the first embodiment of the present invention. FIG. 5 is a partially enlarged plan view of the conveyor belt tensioning device, the tension roller on which a weight is installed, and the belt return portion in the freezer 1 with the conveyor according to the first embodiment of the present invention. FIG. 6 is a partially enlarged front view of a conveyor belt tensioning device in a conventionally used conveyor.

An embodiment embodying the present invention will be described with reference to FIGS. In the figure, the same reference numerals as those in the conventional example denote the same members.
As shown in FIG. 1, a freezer 1 with a conveyor according to an embodiment of the present invention is the same as a conventional freezer with a conveyor. The conveyor belt tensioning device 4 is provided so that the belt moving part 3a of the conveyor belt 3 moving in the direction of the arrow is positioned between the sprocket 2a and the sprocket 2b in the belt returning part 3b via the driven pulley 2.

As shown in FIG. 2, the conveyor belt tensioning device 4 includes a top plate 4 a, a frame 4 b, a bottom plate 4 c, a pipe 4 d, a guide rail 5, and a tension roller 6. The tension of the portion 3b can be maintained.
The top plate 4a and the bottom plate 4c are made of a substantially rectangular thin plate made of stainless steel or the like having a rust prevention effect. The top plate 4a is at one end of the frame 4b, and the bottom plate 4c is the other end of the frame 4b. Installed in each. At this time, the top plate 4a and the bottom plate 4c are fixed to the frame 4b by welding, screwing or the like which is a well-known joining means.

  The frame 4b is a prismatic pipe made of stainless steel or the like having a rust prevention effect. Further, since the frame 4b only forms the outer shape of the conveyor belt tensioning device 4, the frame 4b is not limited to a prismatic pipe, and a prism, a cylinder, a cylindrical pipe, or the like can also be used.

  The pipe 4d is a cylinder made of stainless steel having a rust prevention effect. The pipe 4d has a predetermined interval on one end side in the width direction of the top plate 4a and the bottom plate 4c, and the two pipes 4d are connected to the frame by welding, screwing or the like as well-known joining means. Fixed to 4b. The pipe 4d can also have other shapes such as a cylindrical pipe, a prism, or a prismatic pipe. However, it is desirable that the pipe 4d has a cylindrical shape so that the guide rail 5 can be easily covered.

The guide rail 5 uses ultra high molecular weight polyethylene called Saxin New Light (registered trademark) of Sakushin Kogyo Co., Ltd. Saxin Newlite (registered trademark) is a special industrial resin with a very high molecular weight, mainly composed of ultra-high molecular weight polyethylene, with a molecular weight of 5.5 million, a density of 940 kg / m ³ , a melting point of 136 ° C., and a sand wear loss. It has characteristics such as 13 mg, friction coefficient 0.09, etc. In addition, it has impact resistance even at low temperatures and has self-lubricating properties, and its surface is paraffin-like and smooth, and is non-sticky. Therefore, there is little adhesion of dust or the like.
3A, the guide rail 5 has a substantially C-shaped cross section, and a linear portion 5b is provided at a substantially central position of the outer arc portion 5a of the guide rail 5. As shown in FIG. As shown in FIG. 3B, the straight portions 5b are attached to the pipes 4d so as to face each other. Thus, by providing the straight part 5b, the ground contact area with the tension roller 6 to be attached later can be increased. Further, since the cross section is formed in a substantially C shape, the pipe 4d can be easily mounted, and can be easily removed even when the guide rail 5 is replaced.

  The tension roller 6 has a cylindrical main shaft 6b made of the same material at both ends of a roller portion 6a of a cylindrical pipe made of stainless steel or the like having an antirust effect. It is constituted by being fixed. At this time, it is desirable that the outer diameter of the main shaft 6b is substantially the same as a predetermined interval in the pipe 4d on which the guide rail 5 is mounted.

The conveyor belt tensioning device 4 configured as described above is configured such that the top plate 4a is attached to the inner wall piece 1a of the freezer 1 with the conveyor by bolts (not shown) at both ends in the width direction of the belt backward moving portion 3b. Is fixed, and the tension roller 6 is installed at a predetermined interval in the pipe 4d on which the guide rail 5 is mounted from above the belt return portion 3b.
At this time, the tension roller 6 is merely installed by inserting the main shaft 6b of the tension roller 6 at a predetermined interval in the guide rail 5 and installing the roller portion 6a on the belt return portion 3b. In addition, since the guide rail 5 is made of ultra-high molecular polyethylene having impact resistance even at low temperatures, excellent wear resistance, and self-lubricating properties, The main shaft 6b and the guide rail 5 are not frozen, and can slide in the vertical direction of the guide rail 5 so that the tension roller 6 can be smoothly moved up and down. As a result, as shown by the arrow in FIG. 4, the bending of the belt returning portion 3 b can be pulled downward by the weight of the tension roller 6, and the tension of the conveyor belt 3 can be maintained.

  Further, in the case where the tension of the conveyor belt 3 cannot be maintained only by the own weight of the tension roller 6, as shown in FIG. 5, a screw hole is formed with respect to the length direction of the main shaft 6 b in the tension roller 6. 6c can also be provided. Accordingly, the weight 7 capable of holding the tension of the conveyor belt 3 can be fixed to the main shaft 6b having the screw hole 6c with the bolt 8. At this time, in order to maintain the right and left balance of the main shaft in the tension roller and prevent the meandering of the conveyor belt 3, it is desirable to provide the weight 7 on the main shaft 6b at both ends.

As described above, according to the conveyor belt tensioning device 4 of the freezer 1 with a conveyor according to the embodiment of the present invention described above, ultrahigh molecular weight polyethylene having impact resistance even at low temperatures, excellent wear resistance, and self-lubricating properties. The guide rail 5 having a substantially C-shape formed from is mounted on the pipe 4d, and the main shaft 6b of the tension roller 6 is fitted into a predetermined interval of the guide rail 5, and the roller portion 6a is The main shaft 6a and the guide rail 5 in the tension roller 6 are not frozen in the freezer 1 with the conveyor because the belt is installed on the belt returning portion 3b. Since the sliding is possible, the tension roller 6 can be smoothly moved up and down.
As a result, the bending of the belt returning portion 3b can be pulled downward by the weight of the tension roller 6, and the tension of the conveyor belt 3 can be automatically adjusted to maintain the tension. .
Further, since only the ultra high molecular weight polyethylene is used for the guide rail 5, complicated work such as conventional maintenance when using a bearing is not required, and the structure can be simplified.
Further, since the cross section of the guide rail 5 is formed in a substantially C shape, it can be easily mounted on the pipe 4d and can be easily removed even when the guide rail 5 is replaced. it can.
Further, since the structure is simplified, the balance between the left and right main shafts 6b of the tension roller 6 can be maintained only by the own weight of the tension roller 6, so that the vertical movement of the left and right main shafts 6b is offset. There is no possibility of causing the meandering of the conveyor belt 3.

It is the partial simplified front view which cut | disconnected the freezer 1 with a conveyor which concerns on Example 1 of this invention in the longitudinal direction. It is a partial expanded front view of the conveyance belt tension device, tension roller, and belt backward movement part in the freezer 1 with a conveyor which concerns on Example 1 of this invention. It is the (a) enlarged front view of a guide rail in the freezer 1 with a conveyor which concerns on Example 1 of this invention, (b) The partial enlarged plan view of a conveyance belt tension apparatus, a tension roller, and a belt backward movement part. FIG. 4 is a partially enlarged plan view of the conveyor belt freezer 1 according to the first embodiment of the present invention after sliding the tensioning roller, the tensioning roller, and the belt backward movement unit after the tensioning roller slides. FIG. 3 is a partially enlarged plan view of a conveying belt tensioning device, a tensioning roller provided with a weight, and a belt backward movement portion in the freezer with conveyor 1 according to the first embodiment of the present invention. It is the elements on larger scale of the conveyance belt tensioning apparatus in the conveyance conveyor used conventionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Freezer with conveyor 1a Inner wall piece 2 Driven pulley 2a, 2b Sprocket 3 Conveying belt 3a Belt moving part 3b Belt returning part 4 Conveying belt tensioning device 4a Top plate 4b Frame 4c Bottom plate 4d Pipe 5 Guide rail 5a Outer arc part 5b Straight line Part 6 Tension roller 6a Roller part 6b Main shaft 6c Screw hole 7 Weight 8 Bolt 9 Guide rail 10 Bearing 10a Rotating shaft 11 Locking part 12 Fixing base

Claims (4)

In the conveyor belt tensioning device for a freezer with a conveyor, a part of the conveyor belt is led downward via two sprockets arranged with a gap, and a tension roller for adjusting the extension of the conveyor belt is provided.
The conveyor belt tensioning device (4) used on the conveyor freezer (1), located on both sides of the tension roller (6) having the main shaft (6b) at both ends of the roller section (6a),
Two frames (4b) supporting both ends of the top plate (4a) and the bottom plate (4b);
Two pipes (4d) installed between the frames (4b);
The cross section covered with the pipe (4d) is composed of a substantially C-shaped guide rail (5),
The main shaft (6b) is fitted between the two pipes (4d) on which the guide rail (5) is mounted, and the tension roller (6) is moved to a belt return portion ( 3b) is placed on top,
The guide rail (5) is made of ultra high molecular weight polyethylene, and the tension roller (6) is slidable in the vertical direction of the guide rail (5). Conveyor belt tensioning device. In the conveyor belt tensioning device for a freezer with a conveyor, a part of the conveyor belt is led downward via two sprockets arranged with a gap, and a tension roller for adjusting the extension of the conveyor belt is provided.
The freezer with a conveyor according to claim 1, wherein the guide rails (5) are inserted into the pipe (4d) so as to face each other at a substantially central position of the outer arc portion (5a). Conveyor belt tensioning device. In the conveyor belt tensioning device for a freezer with a conveyor, a part of the conveyor belt is led downward via two sprockets arranged with a gap, and a tension roller for adjusting the extension of the conveyor belt is provided.
The outer diameter of the main shaft (6b) and the gap between the two pipes (4d) on which the guide rails (5) are mounted are made substantially the same. Conveyor belt tensioning device for freezer with conveyor. In the conveyor belt tensioning device for a freezer with a conveyor, a part of the conveyor belt is led downward via two sprockets arranged with a gap, and a tension roller for adjusting the extension of the conveyor belt is provided.
The conveyance for a freezer with a conveyor according to claim 1, 2 or 3, wherein a linear portion (5b) is provided at a substantially central position of the outer arc portion (5a) of the guide rail (5). Belt tensioning device.

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