JP2007008683A - Roller unit for roller conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller unit for a roller conveyor capable of enhancing the durability of a bearing part of a roller to a roller frame. <P>SOLUTION: A first bottom plate 18 is integrally formed on an inner side surface of a first side plate of first and second divided frames 14, 15 to constitute a roller frame 13, and a second bottom plate 19 is integrally formed on an inner side surface of a second side plate 17. A connection pin 18b and an engagement hole 18c are alternately formed in a butted end face of the first bottom plate 18, and the connection pin 18b, a connection pin 19b to be engaged with the engagement hole 18c, and an engagement hole are alternately formed in a butted end face of the second bottom plate 19. A roller 12 is supported by the first and second side plates 16, 17 via first and second stays 24, 25. Auxiliary supporting projecting bars 18e, 19e are formed on upper surfaces of the first and second bottom plates 18, 19 so as to be located immediately below the roller 12, and the roller 12 is received by the auxiliary supporting projecting bars 18e, 19e when the roller 12 is displaced downward under an excessive load. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a roller unit for a roller conveyor used for conveying various articles.

  As a conventional roller unit for a roller conveyor, the one shown in FIG. 11 has been proposed. In this roller unit, insertion holes 52a and 53a are formed at a plurality of positions on the upper ends of the first and second side plates 52 and 53 located on the left and right sides of the roller frame 51 made of synthetic resin, and the insertion holes 52a and 53a are formed. On the other hand, a metal support shaft 55 penetrating into a central hole 54a of a synthetic resin roller 54 is inserted.

  Although not shown, a structure in which the support shaft 55 is cantilevered and supported separately from the first side plate 52 and the second side plate 53 and the rollers 54 are supported on both support shafts has been proposed. .

  Among the conventional roller units, the former roller unit has a merit that the support shaft 55 does not come off from the roller frame 51 because the support shaft 55 passes through the first and second side plates 52 and 53. However, when an excessive force is applied to the roller 54 due to the load of the article supported by the roller 54, the end of the support shaft 55 is bent with respect to the insertion holes 52 a and 53 a of the first and second side plates 52 and 53. Since the load acts, there is a problem that the insertion holes 52a and 53a are damaged early. Further, when the support shaft 55 is made of resin, the support shaft 55 is damaged.

  On the other hand, the latter roller unit is easily damaged by receiving an excessive bending load when the cantilevered support shaft 55 is made of resin, and the first and second roller units are easily damaged when the support shaft 55 is made of metal. There was a problem that the insertion holes 52a, 53a of the two side plates 52, 53 were damaged early and the durability was lowered.

  An object of the present invention is to provide a roller unit for a roller conveyor that can solve the problems in the prior art and improve the durability of a roller bearing portion with respect to a roller frame.

  In order to solve the above problem, the invention according to claim 1 is a roller unit comprising a roller frame and a roller rotatably supported by a support shaft between a pair of left and right side plates facing the roller frame. The present invention is summarized in that the roller frame is provided with roller auxiliary support means that is positioned directly below the roller and can support the lower portion of the roller.

  The invention according to claim 2 is summarized in that, in claim 1, the roller auxiliary support means is an auxiliary support protrusion or an auxiliary support protrusion formed on an upper surface of a bottom plate provided at a lower portion of the roller frame. And

  According to a third aspect of the present invention, in the first aspect, the roller auxiliary support means includes an auxiliary support roller that is bridged between the both side plates of the roller frame, an auxiliary support ball or an auxiliary support roller that is supported by the bottom plate of the roller frame. It is a summary.

  According to the first aspect of the present invention, the roller auxiliary support means capable of supporting the lower portion of the roller frame in an auxiliary manner so as to be positioned directly below the roller frame is provided. When the roller receives an excessive external force, it is possible to prevent an excessive external force from acting on the roller bearing portion, thereby improving the durability of the roller bearing portion.

  According to the second aspect of the present invention, since the roller auxiliary support means is the auxiliary support protrusion or the auxiliary support protrusion formed on the upper surface of the bottom plate provided at the lower part of the roller frame, the configuration of the roller auxiliary support means is simplified. To reduce the number of parts, facilitate manufacturing, and reduce costs.

  In the invention according to claim 3, since the roller auxiliary support means is constituted by an auxiliary support roller or an auxiliary support ball, when the roller receives an excessive external force, the auxiliary support roller or the auxiliary support ball also rotates, Transport can be performed smoothly.

Hereinafter, an embodiment of a roller unit for a roller conveyor embodying the present invention will be described with reference to FIGS.
As shown in FIG. 2, the roller unit 11 of this embodiment includes a plurality of rollers 12 and a roller frame 13 that supports and grips both left and right ends of the rollers 12 in a rotatable manner. The roller frame 13 is divided into a first divided frame 14 and a second divided frame 15 as shown in FIG. The first divided frame 14 and the second divided frame 15 are integrally molded with a synthetic resin material using an injection molding apparatus.

  A first bottom plate 18 is integrally formed over the entire area in the horizontal direction on the inner side surface of the first side plate 16 constituting the first divided frame 14. A second bottom plate 19 is formed across the entire area in the horizontal direction so as to correspond to the first bottom plate 18 on the inner side surface of the second side plate 17 constituting the second divided frame 15.

  End plates 20 and 21 are integrally formed at both front and rear (left and right in FIG. 1) ends of the first side plate 16 and the first bottom plate 18. Similarly, end plates 22 and 23 are integrally formed at both front and rear ends of the second side plate 17 and the second bottom plate 19.

  On the first bottom plate 18, connecting shaft portions 18 a are integrally formed to bulge in parallel with the axial direction of the roller 12 and at a predetermined pitch in the conveying direction of the article of the roller. Every other connecting pin 18b is formed on the distal end surface of the connecting shaft portion 18a. In this embodiment, three connecting pins 18b are formed. Every other engagement hole 18c is formed on the distal end surface of the connecting shaft portion 18a, and in this embodiment, it is formed at three locations. Reinforcing ribs 18d are integrally formed at both upper and lower ends of the outer peripheral surface of the connecting shaft portion 18a. On the upper surface of the first bottom plate 18, auxiliary support protrusions 18 e as auxiliary support means are formed in parallel with the central axis of the roller 12 and integrally with the first bottom plate 18 so as to be positioned immediately below the respective rollers 12. Has been.

  On the other hand, the second bottom plate 19 also has a connection shaft portion 19a, a connection pin 19b, an engagement hole 19c, a reinforcing rib 19d, and an auxiliary support protrusion similar to the connection shaft portion 18a to the auxiliary support protrusion 18e of the first bottom plate 18. Article 19e is formed. As shown in FIGS. 3 and 5, the connecting pin 19 b of the second bottom plate 19 is inserted into the engaging hole 18 c of the first bottom plate 18, and the connecting pin of the first bottom plate 18 is inserted into the engaging hole 19 c of the second bottom plate 19. The first divided frame 14 and the second divided frame 15 are connected to each other by inserting 18b.

  In this embodiment, the first divided frame 14 and the second divided frame 15 are connected by the connecting pin 18b and the engaging hole 18c of the first bottom plate 18 and the connecting pin 19b and the engaging hole 19c of the second bottom plate 19. The connecting means is configured.

  As shown in FIGS. 1, 4 and 6, a plurality of shaft support holes 16a are formed in the upper part of the first side plate 16 so as to be positioned above the adjacent auxiliary support protrusions 18e. The first support shaft 24 passes through the hole 16a in parallel with the connecting shaft portion 18a and is cantilevered. As shown in FIGS. 4 and 6, each first support shaft 24 is loosely fitted into a shaft support hole 12a provided at one end of the roller 12 so as to rotatably support one end of the roller 12. . A plurality of shaft support holes 17a are formed in the upper part of the second side plate 17 so as to correspond to the plurality of shaft support holes 16a, and each shaft support hole 17a corresponds to each first support shaft 24. The second support shaft 25 penetrates in parallel with the connecting shaft portion 19a and is cantilevered. Each second support shaft 25 is loosely fitted into a shaft support hole 12b provided at the other end portion of the roller 12 so as to rotatably support the other end portion of the roller 12.

Next, an assembling operation of the roller unit 11 configured as described above will be described.
In FIG. 1, the shaft support holes 12 a of the respective rollers 12 are engaged with the first support shafts 24 of the first divided frame 14 out of the first divided frame 14 and the second divided frame 15. In this state, the engagement pin 19b formed on the first bottom plate 18 is connected to the engagement hole 19c formed on the butt end surface of the second bottom plate 19 of the second divided frame 15, and the engagement pin 19b formed on the butt end surface of the first bottom plate 18 is engaged. The connecting pins 19b formed on the second bottom plate 19 are engaged with the joint holes 18c. In the course of this operation, the second support shaft 25 attached to the second side plate 17 is loosely fitted into the shaft support hole 12b of the roller 12.

By performing the above operation, the roller unit 11 is assembled integrally as shown in FIGS.
When the roller unit 11 shown in FIG. 2 is used as a roller conveyor, a roller unit accommodation case 31 is used as shown in FIG. The roller unit 11 is removably accommodated inside a grooved steel case main body 32 constituting the roller unit accommodation case 31. Mounting frames 33 and 34 having an L-shaped cross section are connected to the outer surface of the side plate of the case body 32 by spot welding. A mounting bracket unit 35 is detachably attached to the end of the roller unit housing case 31 using the mounting frames 33 and 34. Another mounting bracket unit 36 is also detachably attached to the other end portion of the roller unit housing case 31. And the roller conveyor apparatus provided with the roller unit 11 is mounted | worn in a predetermined place by hooking the said attachment metal fitting units 35 and 36 on the support member which is not shown in figure. Various articles are conveyed by the rollers 12 of the roller conveyor device.

According to the roller unit 11 of the said embodiment, the following characteristics can be acquired.
(1) In the above embodiment, as shown in FIGS. 1 and 7, the auxiliary support protrusions are positioned directly below the rollers 12 with respect to the upper surface of the first (second) bottom plate 18 (19). 18e (19e) was integrally formed. For this reason, an excessive load of the article conveyed on the upper surface of the roller 12 acts, so that the roller 12 has first and second support shafts 24 at both left and right end portions thereof as shown by two-dot chain lines in FIG. When elastically deformed downward about 25, the lower outer peripheral surface of the roller 12 is supported by the auxiliary support protrusions 18e (19e) as shown by a two-dot chain line in FIG. As a result, the roller 12 is deformed abnormally, an excessive bending moment is applied to the first and second support shafts 24, 25, or the shaft support holes 16a, 17a of the first and second side plates 16, 17 are excessively large. It is possible to prevent an excessive load from acting, and it is possible to improve the durability of the roller 12, both side plates 16, 17 and both support shafts 24, 25.

  (2) In the above embodiment, the first bottom plate 18 is integrally formed inside the first side plate 16 and the end plates 20, 21, and a plurality of connecting shaft portions 18 a are integrally formed on the first bottom plate 18. Then, the reinforcing ribs 18d are integrally formed at the upper and lower end portions of each connecting shaft portion 18a. Further, the auxiliary support protrusion 18 e is integrally formed on the upper surface of the first bottom plate 18. Further, the second bottom plate 19 side is configured in the same manner as the first bottom plate 18. For this reason, when the external force which goes down from the roller 12 acts on auxiliary | assistant support protrusion 18e, 19e, the load can be reliably supported by the 1st bottom plate 18 and the 2nd bottom plate 19. FIG.

  (3) In the above embodiment, the connecting pin 18 b and the engagement hole 18 c are provided on the end surface of the first bottom plate 18 formed on the first side plate 16, and the end surface of the second bottom plate 19 formed on the second side plate 17 is provided. Similarly, a connecting pin 19b and an engaging hole 19c are provided. For this reason, the structure of the connection means of the 1st division | segmentation frame 14 and the 2nd division | segmentation frame 15 can be simplified, and the manufacture and assembly | attachment operation | work by mold shaping can be performed easily.

(4) In the above embodiment, since the shaft support holes 12a and 12b are formed in the roller 12, the shaft support holes 12a and 12b of the roller 12 can be easily molded.
In addition, you may change the said embodiment as follows.

As shown in FIG. 9, an auxiliary support roller 41 as auxiliary support means may be rotatably supported so as to bridge the first side plate 16 and the second side plate 17 directly below the roller 12.
As shown in FIG. 10, auxiliary support protrusions 42 to 42 as auxiliary support means may be disposed at a plurality of locations on the upper surface of the bottom plate 13 a of the roller frame 13.

  Although not shown, the lower part of the roller 12 is positioned so as to be directly below the roller 12 and within the elastic deformation regions of the first and second side plates 16 and 17, the roller 12 and the support shafts 24 and 25. You may make it provide the roller auxiliary | assistant support means to support.

  Although not shown, as the roller auxiliary support means, the first bottom plate 18 and the second bottom plate 19 of the roller frame themselves, or auxiliary support balls or auxiliary support rollers supported by the bottom plate may be used.

Although not shown, as a support structure of the roller, a support shaft that is integrally or separately attached to the roller 12 is engaged with shaft support holes 16 a and 17 a provided in the first and second side plates 16 and 17. Also good.
(Technical thought)
The technical ideas other than the claims ascertained from the above embodiments will be described.

  (1) The roller frame according to any one of claims 1 to 3, wherein the roller frame is divided into a pair of left and right divided frames so as to include the side plates, and connected to an assembled state that supports the rollers with respect to both divided frames. A roller unit for a roller conveyor, provided with a connecting means for engaging the shaft, and a support shaft provided on the side plate or roller engaged with a shaft support hole provided on the roller or side plate.

The roller unit for roller conveyor (1) can easily perform the assembly work of the roller frame and the roller.
(2) In the above (1), the connecting means includes a connecting pin 18b that is cantilevered with respect to the butted end surfaces of the bottom plates of the first and second divided frames, and a connecting pin for the butted end surface. A roller unit for a roller conveyor configured by an engagement hole formed to be inserted.

  The roller unit for roller conveyor (2) can simplify the construction of the connecting means, and can be easily manufactured and assembled.

The disassembled perspective view of the roller unit which actualized this invention. The perspective view of the assembly | attachment state of a roller unit. The fragmentary plane sectional view which passes along the center axis line of the connecting pin of a roller unit. The fragmentary plane sectional view which passes along the central axis line of the roller of a roller unit. The transverse cross section which passes along the central axis of the connecting pin of a roller unit. The transverse cross section which passes along the central axis of the roller of a roller unit. The partial front view which shows the 1st division frame and roller of a roller unit. The perspective view of the roller conveyor apparatus using a roller unit. The fragmentary sectional view of the roller unit which shows another example of this invention. The side view of the roller unit which shows another example of this invention. The cross-sectional view which shows the conventional roller unit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Roller unit, 12 ... Roller, 13 ... Roller frame, 18e, 19e ... Auxiliary support protrusion as auxiliary support means, 24, 25 ... Support shaft, 41 ... Auxiliary support roller as auxiliary support means, 42 ... Auxiliary support Auxiliary support protrusion as a means.

Claims (3)

In a roller unit comprising a roller frame and a roller rotatably supported by a support shaft between a pair of left and right side plates opposed to the roller frame,
A roller unit for a roller conveyor provided with roller auxiliary support means which is positioned directly below the roller and can support the lower part of the roller in an auxiliary manner with respect to the roller frame. 2. The roller conveyor roller unit according to claim 1, wherein the roller auxiliary support means is an auxiliary support protrusion or auxiliary support protrusion formed on an upper surface of a bottom plate provided at a lower portion of the roller frame. 2. The roller conveyor roller unit according to claim 1, wherein the roller auxiliary support means is an auxiliary support roller bridged between the both side plates of the roller frame, an auxiliary support ball or an auxiliary support roller supported by a bottom plate of the roller frame.

Images