JPH05330620A - Structure for supporting roller - Google Patents

Abstract

PURPOSE:To perform mounting and dismounting of a bracket in a single operation, to maintain a mounting attitude steadily, and to prevent easy damage of a belt by forming a lower engaging groove so as to open upwards and an upper engaging groove so as to open downwards in the inner surface side of at least one of a pair of bracket supporting frames. CONSTITUTION:A bracket 20 is mounted on a supporting frame 2 by engaging the lower end of the bracket 20 with a lower engaging groove 5 by means of elastic repulsion of a part 21 to be engaged through inserting the lower part of the bracket 20 into a supporting frame 2 side after inserting the upper part of the bracket 20 into an upper engaging groove 6. A roller shaft 11 is fitted to a shaft fitting part 23 with a loose fitting distance between stopper parts 25. During a carrying period, upward movement of the rollers 10, on which a load of an object to be carried is applied, is constrained, and abutment of a belt 15 on roller bodies 12 is maintained steadily. In addition, because the rollers 10, to which the load is not applied, can move upwards within the range wherein a square shaft part 11A abuts on the stopper parts 25, abutment of the belt 15 on the roller bodies 12 can be performed without applying load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller support structure used in, for example, a roller conveyor.

[0002]

2. Description of the Related Art A roller conveyor is provided with a structure in which a roller bracket can be attached to and detached from a conveyor frame and an attachment position can be changed by changing a roller pitch.

That is, as a structure of this type, a roller conveyor disclosed in, for example, Japanese Utility Model Publication No. 2-40007 is conventionally provided. In this conventional structure, the bearing holder has a bearing having a through hole formed in the left-right direction, and has an insertion groove opened in the lower direction and the front-rear direction in the lower portion. The bearing holder is attachable to and detachable from the upper side of the support piece of the intermediate support through the insertion groove, and is also slidable in the length direction of the support piece. The required bearing holder is fixed to the support piece with a set screw.

[0004]

However, according to the above-mentioned conventional structure, the bearing holder which is not fixed by the stopper screw is apt to drop out or move in position. In addition, since the roller passing through the shaft in the through hole does not have a space in the vertical direction, when the roller conveyor is of a drive type in which the drive belt is brought into contact with the idler roller from below, the idler roller is always moved against the idler roller. Since the drive belt is strongly pressed against the drive belt, the drive belt is always loaded and is easily damaged.

An object of the present invention is to provide a roller support structure which can be attached and detached or moved with one touch, can firmly hold the wearing posture, and does not apply a load to the belt side when there is no load.

[0006]

In order to achieve the above object, the roller support structure of the present invention has a structure in which rollers are arranged between a pair of left and right support frames via brackets. At least one of the inner surface side is formed with a lower engaging groove that opens upward and an upper engaging groove that opens downward, and the lower part of the bracket disposed on one inner surface side is And formed so that it can be engaged from above,
An engaged portion is provided in the upper portion, which can be displaced downward against elasticity, and a roller shaft that can be fitted into a bracket disposed on one inner surface side of the roller shaft from above and inward and the roller shaft can be fitted from above. A fitting portion is provided, and a retaining portion that allows the roller shaft to be fitted against the elasticity is provided above the shaft fitting portion at a position that allows the fitted roller shaft to move vertically.

[0007]

According to the structure of the present invention, when the bracket is arranged on at least one of the support frames, the upper portion of the bracket is obliquely below the upper engaging groove from the elastic force of the engaged portion. By inserting with a large insertion force, the engaged portion is deformed against elasticity. Then, by pushing the lower part of the bracket toward the support frame, positioning the lower end of the bracket above the lower engaging groove, and releasing the insertion force,
The elastic repulsive force of the engaged portion lowers the bracket, and the lower end of the bracket is fitted into the lower engaging groove from above, so that the bracket can be attached to the support frame.

At this time, due to the frictional resistance due to the elastic repulsive force of the engaged portion, the bracket is maintained in its mounting position without rattling. Further, by applying a slight external force, the bracket can move in the length direction of the support frame while being engaged with both engagement grooves.

After arranging the bracket groups as described above, both ends of the roller shaft are fitted from above into the shaft fitting portions of the brackets facing each other on the left and right, and a pushing force is applied from above. As a result, the roller shaft moves downward beyond the retaining portion against elasticity, so that the roller shaft is fitted with a loose distance between the retaining shaft and the retaining portion so that the roller can be set between the brackets. ..

In the group of rollers thus set,
For example, when the belt is brought into contact with the bottom surface and moved,
The roller group can be forcibly rotated in the same direction, and thus the object to be transported placed on the roller group can be transported on a fixed path. At this time, the roller on which the load of the conveyed object is applied (when loaded) is prevented from moving upward, so that the contact of the belt with the roller body is strongly maintained. In addition, a roller with no load on the conveyed object (when there is no load) is allowed to move up within the range where the roller shaft hits the retaining part, so the belt does not contact the roller body without applying a load. Be seen.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a main body frame, which is composed of a pair of left and right support frames 2 and a base frame 3 for connecting the lower parts of the support frames 2 and the like. A lower engagement groove 5 that opens upward and an upper engagement groove 6 that opens downward are formed in the entire length in the lengthwise direction on the upper sides of the opposing inner surfaces of both support frames 2. 5,
A dovetail groove portion 7 that opens between 6 is formed. A nut body (a plate nut or the like) 8 can be set in the dovetail portion 7, and a bolt body 9 can be screwed into the nut body 8.

The roller 10 includes a roller shaft 11 and the roller shaft 11.
The roller shaft 12 is fitted onto the roller body 12 so as to be freely rotatable, and both ends of the roller shaft 11 are formed into an angular shaft portion (hexagonal shaft portion) 11A. A plurality of brackets 20 are arranged on the inner surface of the both-sides frame 2, and the rollers 10 are arranged between the brackets 20 facing each other via the angular shaft portion 11A. A driving wheel body 13 and a driven wheel body 14 are separately arranged at both ends in the conveying direction below the group of rollers 10, and a belt 15 stretched between these wheel bodies 13 and 14 is provided.
Is configured so as to be able to contact the group of rollers 10 from below. A drive device (motor) 17 is interlocked with the drive wheel 13 via a winding transmission body 16. 18 indicates a tension wheel.

The bracket 20 can be disposed on the inner surface of the support frame 2 by utilizing the engaging grooves 5 and 6, and is formed in a rectangular plate shape from synthetic resin. The lower portion of the bracket 20 is formed so as to be engageable with the lower engaging groove 5 from above, and the engaged portion 21 is integrally formed on the upper portion so that it can be displaced downward against the elasticity. ing. Here, the engaged portion 21
Is a notch that is open in the center of the upper surface and is recessed in the front-back direction.
The upper 22 pieces form a pair in the front and back. Further, both engaged parts 21 are formed in a higher V shape toward the center side when an external force is not applied, and are configured to be displaced downward by the external force from above against elasticity.

Further, on the inner surface sides of the bracket 20 which face each other, the square shaft portion of the roller shaft 11 is opened upward and inward.
A shaft fitting portion 23 into which 11A can be fitted from above is formed by a U-shaped rib member 24 protruding inward from the inner surface. A retaining portion that allows the angular shaft portion 11A to be fitted against the elasticity of the rib member 24 from the upper surface of the pair of vertical pieces of the rib member 24 forming the shaft fitting portion 23 and the surface sides facing each other. 25 is integrally molded. Further, the retaining portion 25 is the shaft fitting portion 23.
It is provided in a position that allows vertical movement of the square shaft portion 11A fitted in the. It should be noted that recesses 26 are formed on both sides of the bracket 20 at positions below the shaft fitting portion 23 so as to enter inside.

The operation of the above structure will be described below.
In order to dispose the bracket 20 on the support frame 2, first, referring to FIG.
As shown by the solid line in FIG.
Insert it diagonally from below. At that time, by applying an insertion force larger than the elastic force of the engaged portion 21, the engaged portion 21
Against the elasticity, it is deformed to the position shown by the phantom line B in FIG. 2, for example. As a result, the lower end of the bracket 20 is positioned higher than the lower engagement groove 5, and therefore, by pushing the lower portion of the bracket 20 toward the support frame 2 side, the lower end of the bracket 20 is moved to the lower engagement groove 5 as shown by the phantom line in FIG. Can be located above.

Next, by releasing the insertion force, the bracket 20 is lowered by the elastic repulsive force of the engaged portion 21, and the lower end of the bracket 20 can be fitted into the lower engaging groove 5 from above. As a result, the bracket 20 can be attached to the support frame 2. At this time, the engaged portion 21 resists elasticity and is deformed to a position shown by a virtual line B in FIG. Due to the frictional resistance due to this elastic repulsive force, the bracket 20 is maintained in its wearing position without rattling. Further, by applying a slight external force, the bracket 20 can move in the longitudinal direction of the support body 2 while being engaged with both the engagement grooves 5 and 6.

The brackets 20 are densely arranged in the lengthwise direction of the support 2, and, if necessary, the brackets 20 at both ends in the lengthwise direction and the intermediate brackets 20 are attached to the supporter 2 via a fixture. Fixed to. That is, the bracket 20 can be fixed at a predetermined position by setting the nut body 8 in the dovetail portion 7 and screwing the bolt body 9 passed through the recess 26 from the outside into the nut body 8.

After arranging the group of brackets 20 as described above, the rollers 10 are provided between the brackets 20 facing each other on the left and right.
Is set. That is, as shown in FIG.
The angular shaft portions 11A at both ends of 11 are fitted into the shaft fitting portion 21 from above, and a pushing force is applied from above. As a result, the rib member 24 bends against the elasticity, and the angular shaft portion 11A moves downward beyond the retaining portion 25, whereby the retaining portion 25
Are fitted with a floating distance L between them.

In the group of rollers 10 thus set, the lower surface of the roller body 12 is in contact with the belt 15. Therefore, by moving the belt 15 by the operation of the drive device 17, the group of rollers 10 can be forcibly rotated in the same direction, and thus the object to be conveyed placed on the group of rollers 10 can be conveyed on a fixed path. At that time, since the roller 10 on which the load of the conveyed object is applied (when loaded) is prevented from moving upward, the contact of the belt 15 with the roller body 12 is strongly maintained, and the load of the conveyed object is also increased. Is not applied (no load)
Since the roller 10 is allowed to move upward within a range where the square shaft portion 11A hits the retaining portion 25, the roller 10 is a belt for the roller body 12.
The contact of 15 is performed without applying a load.

FIG. 5 shows another embodiment of the present invention. That is, the bracket 20 is formed of a long material having a plurality of shaft fitting portions 23 and the like. Here, the shaft fitting portion 23 has a predetermined pitch P.
Therefore, the rollers 10 can be arranged at a predetermined pitch P by using all the shaft fitting portions 23, and by using every other shaft fitting portion 23, Double pitch P placement (2P), two more fitting shafts
By using 23, the arrangement pitch of the rollers 10 can be arbitrarily changed by an integral multiple, such that the rollers 10 can be arranged at a pitch P three times (3P).

A vertical slit 27 is formed between adjacent shaft fitting portions 23, and a lateral elongated hole 28 communicating with the lower end of the slit 27 is formed.
Notch 29 at one or both ends on the extension line of the
When formed, the amount of resin used can be reduced by the presence of these 27, 28 and 29, and the 27, 28 and 29 can be cut off as cutting lines. By this separation, the short bracket 20 as described in the previous embodiment is obtained, and the recess 26 is formed by the separated long hole 28.

In the above embodiment, the driving type roller conveyor in which the belt 15 is brought into contact with the roller 10 from below is shown, but this is a roller supporting structure of the roller conveyor for driving the roller 10 by another driving method. Alternatively, it may have a roller supporting structure of a non-drive type roller conveyor in which the group of rollers 10 can freely rotate.

In the above-mentioned embodiment, the brackets 20 having the same shape are arranged on both the support frames 2, but the bracket 20 having the engaged portion 21 and the like is arranged on only one of the support frames 2 and the other one. The support frame 2 may have a configuration in which an ordinary bracket or the like is arranged.

[0024]

According to the present invention having the above-described structure, the bracket can be attached / detached to / from at least one of the support frames with one touch, and the wearing posture is such that the engaged portion has an elastic force on the inner surface of the upper engaging portion. The bracket can be firmly held by being abutted via, and the bracket can be easily moved against the elastic force. Further, when the load is not applied, the roller shaft can be moved up to the position where it comes into contact with the retaining portion, so that the belt side can be in a state where no load is applied, and the belt is less likely to be damaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a roller conveyor showing an embodiment of the present invention.

FIG. 2 is a side view of the bracket portion.

FIG. 3 is a vertical sectional front view showing a state where the bracket is mounted.

FIG. 4 is a schematic side view of the roller conveyor.

FIG. 5 is a side view of the bracket portion showing another embodiment of the present invention.

[Explanation of symbols]

 1 Main Frame 2 Support Frame 3 Base Frame 5 Lower Engagement Groove 6 Upper Engagement Groove 7 Dovetail Groove 8 Nut Body 9 Bolt Body 10 Roller 11 Roller Shaft 11A Square Shaft 12 Roller Body 15 Belt 17 Drive Unit 20 Bracket 21 Engagement Mating part 22 Notch part 23 Shaft fitting part 24 Rib member 25 Lock-out part 26 Recessed part 27 Slit 28 Long hole L Floating distance P Predetermined pitch

Claims (1)

[Claims] 1. When disposing a roller between a pair of left and right supporting frames via a bracket, a lower engaging groove that opens upward and a lower engaging groove are formed on at least one inner surface side of opposing inner surfaces of both supporting frames. An upper engaging groove that opens to the inside is formed, and the lower portion of the bracket disposed on one inner surface side is formed so as to be engageable with the lower engaging groove from above, and the upper portion resists elasticity. And an engaged portion that is displaceable downwards are provided, and further, a bracket provided on one inner surface side is provided with a shaft fitting portion that is opened upward and inward and a roller shaft can be fitted from above. A roller support structure characterized in that an upper portion of the shaft fitting portion is provided with a retaining portion for allowing the roller shaft to be fitted therein against elasticity, at a position where vertical movement of the fitted roller shaft is allowed.