JP3808059B2 - Belt curve conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a belt curve conveyor used for changing the conveyance direction of a conveyed product, and more particularly, to a belt curve conveyor in which a sector belt provided in the conveyor can be easily attached to and detached from a main body.
[0002]
[Prior art]
Usually, when changing a conveyance direction in the belt conveyor which conveys a conveyed product, the belt curve conveyor is used. In general belt curve conveyor, in order to prevent the belt from being pulled inward or biased by its tension, a large number of guide rollers that form an edge on the outer periphery of the sector belt and sandwich the peak are independent of each other It is installed on a guide bar on the outer periphery of the belt and holds tension on the outside of the sector belt. As a result, belt replacement was not easy. In this belt curve conveyor, the belt is exchanged as necessary. However, when conveying articles such as food and medicine, the belt is periodically removed and washed to keep the entire conveyor line clean. Yes. For this reason, it is known that two guide rollers are installed as one set and are mounted in two stages on the upper and lower sides to support the thick part (protrusion) at the belt end to prevent belt bias and facilitate belt replacement. Yes. That is, there is a cam on the upper part of the operating lever, and the operating lever is rotated to bring the upper cam into contact with the frame surface instead of the first cam surface to the second cam surface. One guide roller is fixed to each of the arms, and the arm that is urged to expand in an unlimited state is pushed out of the guide member, the arm protrudes forward and the arm expands, and the guide roller moves from the thick part (projection) at the end of the belt. The belt can be removed and replaced (Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-114343 (page 4, left column, line 33 to page 5, right column, line 31, lines 1 and 4)
[0004]
[Problems to be solved by the invention]
However, first, in a general belt curve conveyor, the guide rollers are fixed to the fixed holder by bolts that are fitted to the inner peripheral surface of the guide roller via bearings. When removing and attaching the belt, it was necessary to remove a part of the fixed holder and remove the guide roller together with the fitting bolt. For this reason, a tool is required to remove a part of the fixed holder and remove and attach the guide roller together with the fitting bolt. Since it is disassembled into a part of these holders, rollers, bolts and parts, the fan belt after disassembly and cleaning. It takes a lot of time and effort to re-install. Further, in the above-mentioned Japanese Patent Laid-Open Publication, the support of the thick portion at the belt end can be released by operating the guide roller with the operation lever, and basically the belt can be pulled out to the fan-shaped inner diameter side. However, the urging force in the expanding direction of the upper arm and the lower arm is weakened by staying in the guide member for a long time, and it does not expand much even if it protrudes forward with the operation lever, and the belt is pulled out to the fan-shaped inner diameter side. When the belt is bent downward, the thick portion (projection) at the end of the belt is caught by the lower guide roller, and the guide roller is eventually disassembled and removed. Therefore, a tool is required to remove and attach the guide roller together with the fitting bolt, and since it is disassembled into these parts, a lot of time and labor are required when the fan belt is mounted again after disassembly and cleaning. . It is an object of the present invention to provide a belt curve conveyor that facilitates belt removal by sequentially rotating a guide wheel inside the belt by 90 degrees by operating a lock handle.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 of the present invention is a belt curve conveyor in which a plurality of guide wheel units that sandwich belt ends are sandwiched between belt profiles (peripheral part, outer peripheral part) of a sector belt, Semicircular edges that contact the guide wheels are formed on the front and back of the outer peripheral portion of each of the first and fourth guide wheels that contact the outer surface edge portions of the forward side belt and the return side belt. The second and third guide wheels are in contact with the inner surfaces of the forward side belt (carrier side belt) and the return side belt (return side belt); the first and fourth guide wheels are fixed to the outer periphery of the base. The second and third guide wheels are respectively supported at the inner center of the holder. It is supported by a spring plate or a support piece with cushion rubber fixed on the top and bottom of a pivot shaft bracket that is pivotably mounted; and a lock portion is built in the pivot shaft at the center of the holder, and the pivot shaft A lock hole is formed on the outer end face to engage the distal end key portion of the detachable lock handle, and the lock handle is inserted and the rotation shaft is rotated 90 degrees, whereby the second and third guide wheels are moved to the belt. A belt curve conveyor characterized in that the belt can be removed away from the inner surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a pair of a first guide roller in contact with the upper surface of the belt on the carrier side and a fourth guide roller in contact with the lower surface of the belt on the return side, and is fixed to the bracket via a support piece with a leaf spring or cushion rubber, A pair of a second guide roller in contact with the lower surface of the carrier side belt and a third guide roller in contact with the upper surface of the return side belt are fixed to the bracket via a support piece with a leaf spring or cushion rubber, and further, the belt carrier and the return side It is arrange | positioned so that rotation is possible. When the belt is exchanged, the pair of guide rollers (second and third guide rollers) are rotated by 90 ° so that the belt can be exchanged away from the thick part at the end of the belt.
[0007]
Conventionally, the belt profile (peripheral part, outer peripheral part) is largely damaged and peeled as a cause of trouble in the belt curve conveyor. In the present invention, a guide wheel (spring-type guide holder) is used as a presser for the belt profile portion to support the belt profile portion with a certain holding force to prevent the belt from being damaged, and on the belt side near the belt profile portion. Protrusions are provided, skirts are provided from the frame side, and traps are provided in the gaps to prevent the tag (tag) from being caught and maintain reliability.
In general, all belts, chains, motors, and inner frames must be removed when changing belts. For example, it takes about 2 hours for 3 workers, and maintenance is poor. To adjust the contact between the guide wheel and the belt profile evenly, there is a large part that depends on experience. If the contact with the guide wheel is too strong, the belt profile may be damaged or peeled off, resulting in poor reliability and ease of assembly. Is also bad. In contrast, in the present invention, one detachable lock handle is sequentially inserted into a lock built in the shaft portion of the guide holder, and the holder is rotated 90 ° to release the belt restraint, thereby greatly reducing the belt replacement time. It becomes possible to do. That is, the release mechanism of the guide wheel can easily release a belt with a large clearance, and the belt loosening function in the take-up mechanism of the head-and-tail roller such as a drive roller is set to about 30 minutes, thereby Maintenance is improved. When the guide holder is turned 90 °, it is not just screwed in, but only the same position, so when the belt is restored after cleaning, the same contact as just before can be reproduced by rotating it in the opposite direction. Assembling can be improved. Note that low noise operation can be realized by employing a hollow shaft motor, which is a chainless type motor, in the drive section of the end pulley.
[0008]
According to the present invention, a pair of a first guide roller in contact with the upper surface of the belt on the carrier side and a fourth guide roller in contact with the lower surface of the belt on the return side are fixed to the bracket using a support piece with a leaf spring or cushion rubber. A pair of a second guide roller in contact with the lower surface of the side belt and a third guide roller in contact with the upper surface of the belt on the return side are fixed to the bracket using a support piece with a leaf spring or cushion rubber, and further, a belt carrier in the belt And an axis between the return side and the return side. When the belt is exchanged, the pair of guide rollers (second and third guide rollers) is rotated by 90 ° with respect to the central axis so that the belt can be exchanged away from the thick part at the end of the belt.
[0009]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of the belt curve conveyor of the present invention, FIG. 2 is a partially enlarged plan view of FIG. 1, FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG. 2, and FIG. It is the front view seen in the arrow direction.
The curved belt conveyor 1 hangs the sector belt 10 between the end pulleys 3 and 4 at both ends, and a large number of guide wheel units 50 provided on the outer peripheral edge of the belt, the thick edge 38 (FIG. 6) of the outer peripheral edge of the curved belt. The vehicle runs with the outer side tensioned so as to support and prevent the curve belt from moving in the sector inner diameter direction. The main part of the conveyor is supported by leg members 7 provided at cross members 5 and 5 near the end pulleys 3 and 4 and a cross angle 6 at the center of the plane of the fan-shaped part. A torque arm 18 is secured to the end of the cross member 5 on the large-diameter shaft end side of the drive-side end pulley 3 by using a bolt 19, and a drive unit 15 comprising a motor (hollow shaft motor) 16 and a speed reducer 17 is attached to the torque arm 18. Is assembled.
In the figure, reference numerals 8 and 9 are side plates, 11 is a base, 12 is a floor plate (FIG. 6), 12a is a support, 13 is an outer cover, 13a is a skirt, 14 is a guide rail, 21 is a pulley shaft, and 22 is thin. A radial pulley bracket, 22a is a large diameter pulley bracket, 23 and 24 are bearing members, 25 and 26 are spherical bearings, and 27 is an end cap. In FIG. 4, 22b is an adjustment screw, and 22c is an adjustment receiver.
[0010]
As shown in FIGS. 3 and 6, semi-circular thick edges 38 and 38 that contact the guide wheel of the guide wheel unit 50 are formed on the front and back of the outer peripheral portion (belt profile 20) of the belt 10. . The edges 38 are formed at the end of a continuous side 38a that wraps around the belt edge.
The belt protrusions are usually square or trapezoidal at a predetermined distance from the belt periphery, but if meandering, the raised corners of the square or trapezoidal protrusions sandwiched by the guide wheel will be cut. In the present invention, the edge portion is rounded to prevent bite from being completely prevented. In addition, there is a gap of 3 to 5 mm between the belt and the outer periphery cover (outer cover skirt 13a). Protrusions 39 (FIG. 6) are provided on the belt surface to serve as a tag (tag) entrainment preventing means for filling the gap.
[0011]
Each guide wheel unit 50 includes first and fourth guide wheels 52a and 52d that contact outer edge portions of the forward belt and the return belt, and second and second contacts that contact the inner surfaces of the forward belt and the return belt. 3 guide wheels 52b and 52c (FIG. 6). The first and fourth guide wheels 52a and 52d are respectively supported by spring plates 47 and 47 fixed to the upper and lower horizontal sides 42 and 43 of the holder 40 fixed to the outer periphery of the base, and the second and third guide wheels 52b. , 52c are supported by spring plates 47, 47 fixed to the upper and lower sides of a rotating shaft bracket 45 that is rotatably mounted at the inner center of the holder 40, and locked inside the rotating shaft 44 at the center of the holder. And a lock hole 61 for engaging the distal end key portion 63 of the detachable lock handle 62 is formed on the outer end surface of the rotation shaft 44, the lock handle is inserted, and the rotation shaft 44 is rotated 90 degrees. By doing so (FIG. 7), the second and third guide wheels 52b and 52c are separated from the inner surface of the belt as shown by the chain line in FIG. 8, and the belt can be removed.
[0012]
FIG. 5 is a front view as viewed in the direction of the arrow from the CC line in FIG. 3, and the pulley pulley 22 on the small diameter side of the end pulley is fixed to the side plate 9 with bolts, and the bearing member 24 is supported via the slide 28. To do. A square hole 29 is provided in one of the bearing members 24 to fit the head 33 of the screw bar 31 in the take-up unit 30. The square hole 29 has a notch 34 that opens forward. The screw bar 31 is inserted into a bracket 32 provided on the side plate 9, and a nut 35 on the side of the notch 34 and nuts 36, 37 that are in contact with both sides of the bracket 32 are screwed together. The bearing member 24 is set so as to obtain tension.
[0013]
The detachable lock handle device includes a case provided with a keyhole on the front surface, a passive protrusion on the front peripheral portion, and a locking shaft on the rear surface, as disclosed in Japanese Patent Application Laid-Open Nos. 9-67960 and 9-1000065. A locking portion comprising a rotor with a protruding portion, a cover plate disposed at the rear of the rotor, a rotor guide, a bearing ring provided in the case, and a spring that urges the cover plate forward, and a diameter of the handle tip It is composed of a lock handle provided with a key as an operation part in the direction, but the one used in the present invention is a cruciform keyhole having notches at four positions at 90 ° intervals around the lock hole 61 (FIG. 7). Correspondingly, there are four protrusions at the tip of the lock handle 62 to ensure the 90 ° rotation of the handle.
As shown in FIG. 8, after the second and third guide wheels 52b and 52c are turned 90 ° by the operation of the lock handle and separated from the inner surface of the belt, the mounting bolts on the pulley pulley 22 on the small diameter side of the end pulley are loosened. Thus, the belt can be removed by sliding the bearing member 24 outward.
[0014]
FIG. 9 is an enlarged cross-sectional view of the guide wheel 50. In this guide wheel 50, a shoulder bolt 51 is fitted to the inner peripheral surface of a wheel (bearing) 52, and is provided to face the spring plate 47 via a ring 56, and is extended to one side of the shoulder bolt 51. Is passed through a hole formed in the spring plate 47, and a nut 55 is screwed onto the spring plate 47.
[0015]
FIG. 10 is an enlarged side view showing another embodiment of the guide wheel unit. In this case, instead of the spring plate (spring), the guide wheels 52a to 52d are attached to the front end of the normal steel plate using a cushion rubber (buffer material) 58. That is, a support piece 57 in which a normal steel plate (for example, SS41) is bent at an obtuse angle is attached to the upper and lower horizontal sides 42 and 43 of the holder 40 and the bracket 45, and a guide is provided with cushion rubber 58 sandwiched between the tips of the support pieces 57. The shoulder bolts 51 of the wheels 52 a to 52 d are inserted and tightened with nuts 55. However, in FIG. 10, the illustration of the lower horizontal side 43 and the guide wheel 52d is omitted. In this way, the tension of the belt 10 is provided by bringing the guide wheel 52 into contact with the semicircular edge portions 38 and 38 of the belt by the elasticity of the cushion rubber 58.
[0016]
【The invention's effect】
As described above, the belt curve conveyor according to the present invention can support the belt profile portion by using a spring plate or a support piece with a cushion rubber as a presser of the belt profile portion, thereby supporting the belt curve portion and preventing the belt from being damaged. By adopting the type holder, it is possible to greatly shorten the replacement time. In addition, the spring-type guide wheel can prevent the tag from being caught, and the one-touch belt exchanging mechanism has an effect that maintenance and assembling can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a belt curve conveyor of the present invention.
FIG. 2 is a partially enlarged plan view of FIG. 1;
FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG.
4 is a front view seen in the direction of the arrow from the line BB in FIG. 3. FIG.
5 is a front view as seen in the direction of the arrow from the line CC in FIG. 3. FIG.
6 is a cross-sectional view further enlarged along the line DD in FIG. 2. FIG.
7 is a side view of FIG. 6. FIG.
8 is a front view as seen in the direction of the arrow from the line EE in FIG. 6. FIG.
FIG. 9 is an enlarged cross-sectional view of a guide wheel.
FIG. 10 is an enlarged side view showing another embodiment of the guide wheel unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Curve belt conveyor 2 Linear conveyor 3, 4 End pulley 5 Cross member 6 Cross angle 7 Leg unit 8, 9 Side plate 10 Belt 11 Base 12 Floor board 12a Support 13 Outer cover 13a Skirt 14 Guide rail 15 Drive unit 16 Motor (hollow shaft motor)
17 Reduction gear 18 Torque arm 19 Bolt 20 Belt profile 21 Pulley shaft 22 Small diameter pulley bracket 22a Large diameter pulley bracket 22b Adjustment screw 22c Adjustment receiver 23, 24 Bearing member 25, 26 Spherical bearing 27 End cap 28 Slide 29 Square hole 30 Take-up unit 31 Screw bar 32 Screw bar insertion bracket 33 Head 34 Notch 35, 36, 37 Nut 38 Semicircular edge 38a Continuous side 39 Projection 40 Holder 41 Vertical side 42, 43 Horizontal side 44 Shaft 45 Bracket 46, 48 Bolt 47 Spring plate 49 Nut 50 Guide wheel unit 51 Shoulder bolt 52a-52d Wheel 53 Screw part 54 Square hole 55 Nut 56 Ring 57 Support piece 58 Cushion rubber 60 Lock part 61 Key hole 62 Lock handle 63 Key 70 Belt running direction

Claims (1)

A belt curve conveyor in which a large number of guide wheel units that sandwich the belt end on the outer periphery of a sector belt are arranged,
A semicircular edge that contacts the guide wheel is formed on the front and back of the outer peripheral portion of the belt,
Each of the guide wheel units includes first and fourth guide wheels that contact outer edge portions of the forward belt and the return belt, and second and third guides that contact the inner surfaces of the forward belt and the return belt. Consisting of wheels,
The first and fourth guide wheels are respectively supported by spring plates fixed to the upper and lower sides of the holder fixed to the outer peripheral portion of the base or support pieces with cushion rubber, and the second and third guide wheels are the inner center of the holder. It is supported by a support plate with a spring plate or cushion rubber fixed to the top and bottom of a pivot shaft bracket that is rotatably mounted on
In addition, a lock portion is built in the rotation shaft in the center of the holder, and a lock hole is formed on the outer end surface of the rotation shaft to engage the tip key portion of the detachable lock handle. A belt curve conveyor characterized in that the belt can be removed by rotating the shaft 90 degrees to separate the second and third guide wheels from the inner surface of the belt.

Images