JP6518371B2 - Conveyor roller bearing damage detection device and bearing damage detection member used in the device - Google Patents

Description

  The present invention relates to a conveyor roller bearing damage detection device and a bearing damage detection member used for the same, which can easily detect damage to a bearing portion of a conveyor roller when the damage occurs. It is.

  Conveyor rollers are widely used for belt travel of a belt conveyor. And, as a general belt conveyor, there is one shown in FIG. 25. This belt conveyor is an endless conveyor belt 9 comprising a carrier side conveyor roller 1 located on the upper side and a return side conveyor roller 1 'located on the lower side. By winding one of the conveyor pulleys, so that the endlessly wound conveyor belt 9 can be circulated.

  Each of the conveyor rollers 1, 1 'in the belt conveyor uses a roller body 10 in which a roller cylinder 12 is rotatably mounted on the roller shaft 11 via a bearing 13 (a bearing is generally used). Both ends 11a and 11b of the roller shaft 11 of 10 are supported by the roller stand 2 in a non-rotating state. In this type of belt conveyor, a large number of conveyor rollers 1, 1 'are installed at a predetermined interval in the belt length direction, and endless conveyor belts 9 are attached to the conveyor rollers 1, 1' (roller body 10). It is structured by winding.

  As shown in FIGS. 25 and 26, in the conventional conveyor roller 1 (each roller body 10) for a belt conveyor, both axial ends 11a and 11b of the roller shaft 11 correspond to the roller shaft support 26 of the roller stand 2 (FIG. Is supported in a non-rotating state). That is, as shown in FIG. 26, the conveyor roller 1, 1 ′ of this type has a pair of chamfered portions (cut portions) 14 at positions facing the outer periphery of the shaft end 11a (and 11b) of the roller shaft 11 as shown in FIG. 14 are formed, and the chamfered portions 14, 14 of the shaft end 11a are dropped into the roller shaft support 26 (U-shaped groove) of the roller stand 2 (each chamfered portion 14, 14 of the shaft end 11a is The roller shaft 11 (which is guided by the side edges 26 a and 26 a of the roller shaft support 26) is supported non-rotatably with respect to the roller stand 2.

  Then, during operation, the traveling conveyor belt 9 is in contact with the roller cylinder 12 so that normally (when the bearing 13 is normal), the roller cylinder 12 rolls about no load on the roller shaft 11 It is supposed to move.

  By the way, a belt conveyor of this kind is often used to transport a conveyed product containing ore, earth and sand, or granular material such as coal, but the bearing 13 portion of each conveyor roller 1 (or 1 ') In addition to the severe load from the load, damage may occur (for example, the bearing ball may break) due to the intrusion of rain water or dust. Thus, when damage occurs to the bearing 13 portion of the conveyor roller 1 (or 1 '), the roller cylinder 12 becomes difficult to rotate with respect to the roller shaft 11 (in the worst state, the roller cylinder 12 may stop rotating) The frictional heat is generated between the roller cylinder 12 and the conveyor belt 9). Then, the frictional heat generated here is accumulated in the roller cylinder 12 and the roller cylinder 12 becomes abnormally high temperature, and the high temperature heat damages the conveyor belt 9 in contact with the roller cylinder 12 or extends the fire. Can lead to a major accident like the occurrence of

  In order to prevent such an accident due to the abnormally high temperature of the roller cylinder 12, conventionally, an inspector periodically patrols the large number of conveyor rollers 1 (or 1 ') to check the presence or absence of an abnormal portion . And this abnormal inspection method inspects the presence or absence of the stop roller by vision, the presence or absence of abnormal noise of the bearing 13 part by hearing, the presence or absence of the offensive odor from the conveyor belt 9 by the smell etc while the inspector walks along the belt conveyor The current situation is

  However, according to the inspection method of the conveyor roller by visual inspection, hearing, smelling, etc. by the inspector as described above, when the conveyance distance of the belt conveyor is long (for example, 500 m or more), the number of conveyor rollers used is very large. (For example, 500 to 1000) Careful inspection of the conveyor rollers one by one requires a great deal of labor and time, and it is difficult to discriminate an abnormality, so it is possible to overlook abnormalities (bearing damage) There was a risk that this could lead to a serious fire accident when overlooked.

  By the way, among the well-known patent documents, there exists an abnormality detection apparatus of the conveyor roller shown, for example by patent document 1 (patent 3798494). The conveyor roller abnormality detection device of Patent Document 1 detects damage to the bearings between the roller shaft and the roller cylinder, and for each conveyor roller of the belt conveyor, a generator serving as a power supply and the temperature in the vicinity of the bearings A temperature switch to be detected and a temperature abnormality alarm (a lamp, a buzzer, etc.) connected to the temperature switch are provided. The generator employs a generator that can generate electricity when the roller cylinder rotates with respect to the roller shaft, and the temperature switch is fixed to the roller shaft in the vicinity of the bearing. Each lead wire (installed through the inside of the roller shaft) from the generator and the temperature switch is connected to the conveyor roller).

  Then, with this known conveyor roller abnormality detection device, when the temperature in the vicinity of the bearing becomes abnormally high due to damage to the bearing, the abnormal high temperature is detected by the temperature switch, and then the temperature switch is used. The temperature abnormality alarm is electrically operated by the signal of 1 to notify the surrounding. Therefore, in the conveyor roller abnormality detection device of this known example, the inspector individually checks each conveyor roller. It is possible to easily identify (confirm) the conveyor roller in which the abnormality has occurred, without the need of the above.

Patent No. 3798494 gazette

  However, although the above-described known conveyor roller abnormality detection device (patent document 1) can easily identify (confirm) abnormality (bearing damage) of each conveyor roller in a series of belt conveyors, this abnormality detection device As it is an electrical detection device equipped with a generator, a temperature switch, and a temperature abnormal alarm like this, the installation and wiring of those accessories become very complicated (very difficult to assemble). There is a problem that the cost per set becomes very expensive. Incidentally, the conveyor roller abnormality detection device disclosed in the above-mentioned Patent Document 1 is not widely used at present because of the serious problems as described above.

  Therefore, according to the present invention, when an abnormality occurs in the conveyor roller due to damage to the bearing portion (at the time when the roller cylinder becomes difficult to rotate), the abnormal state (bearing damage state) can be easily confirmed and mechanical (mechanically It is an object of the present invention to provide a conveyor roller bearing damage detection device and a bearing damage detection member used for the same, which can be manufactured simply and inexpensively.

  The present invention has the following configuration as means for solving the above problems.

  The inventions of the following claims 1 to 5 are directed to a bearing damage detection device for a conveyor roller, and the inventions of claims 6 to 8 of the present application are a bearing damage detection member used for a bearing damage detection device for a conveyor roller The target is In the following description, the "conveyor roller bearing damage detection device" according to each of claims 1 to 5 of the present application is simply expressed as "a bearing damage detection device", and the "conveyor according to each of the inventions according to claims 6 to 8 of the present application The bearing damage detection member used for a roller bearing damage detection device is simply expressed as a "bearing damage detection member".

[Invention of Claim 1]
In the bearing damage detection device according to the invention of claim 1, the roller cylinder is rotatably mounted on the roller shaft via the bearing, and both shaft ends of the roller shaft are supported by the roller shaft supporting portion of the roller stand. In the conveyor roller, both shaft ends of the roller shaft are rotatably supported in a state having a bearing resistance larger than the normal bearing resistance of the bearing with respect to the roller shaft support portion of the roller stand. The roller shaft rotation can detect the roller shaft rotation operation when the bearing is damaged and the bearing resistance of the bearing becomes larger than the bearing resistance of the roller shaft support portion and the roller shaft rotates with the roller cylinder. It is characterized in that it comprises detection means.

  In the bearing damage detection device according to the first aspect of the present invention, a rolling bearing having a small bearing resistance is adopted as the bearing between the roller shaft and the roller cylinder, and the bearing resistance of the roller shaft supporting portion of the roller stand is considerably larger than that A bearing can be employed (adopted in claim 2 below).

  If the roller shaft of the conveyor roller is rotated in the roller cylinder rotation direction due to bearing damage, the roller shaft rotation detection means in the invention of the first aspect can detect it (that can be confirmed by the inspector). For example, the configuration is not particularly limited.

  The bearing damage detection device of the invention of claim 1 has the following functions.

  Both shaft ends of the roller shaft are rotatably supported with respect to the roller shaft support of the roller stand, but when the bearings between the roller shaft and the roller cylinder are normal, the bearing resistance of the bearing portion (rolling bearing) is Since the bearing resistance of the roller shaft support (sliding bearing) is larger, the roller shaft remains non-rotated even if the roller cylinder rotates. Therefore, in this state (roller shaft non-rotation state), it can be determined that the bearing is normal.

  On the other hand, the bearing portion (rolling bearing) between the roller shaft and the roller cylinder is damaged, and the rolling bearing resistance of the bearing portion is greater than the bearing resistance of the roller shaft support (slide bearing) supporting the shaft end of the roller shaft. When it becomes larger, when the roller cylinder rotates, the roller shaft rotates together with the roller cylinder in the roller cylinder rotation direction. When the roller shaft rotates in the roller cylinder rotation direction, the roller shaft rotation detection means of the conveyor roller detects and operates the roller shaft rotation operation, and the detection result can be confirmed. The angle at which the roller shaft rotates due to damage to the bearing (rolling bearing) may be, for example, in the range of about 30 ° to 90 °, but the roller shaft rotation detection means uses an appropriate transmission means for rotating the roller shaft. It is preferable to make it easy to view.

  In the present application, it is natural that only one long roller body can be adopted as a conveyor roller, but a plurality of short roller bodies divided into a plurality of lines are arranged coaxially in a straight line, or as shown in FIG. In order to bend and run the conveyor belt in the form of valley folds in the width direction, three short roller bodies may be continuous in an angled refracted state. In the case of a conveyor roller having a plurality of roller bodies as one set, each roller body is provided with a bearing damage detection function (roller shaft rotation detection means), but the detection result display unit shares three roller bodies. There may be only one location (see, for example, the embodiment of FIG. 2 described later).

[Invention of Claim 2 of the Present Application]
The invention of claim 2 of the present application is characterized in that in the bearing damage detection device of the above-mentioned claim 1, while the bearing between the roller shaft and the roller cylinder is a rolling bearing, the roller shaft supporting portion of the roller stand is a sliding bearing. There is.

  According to the second aspect of the present invention, the bearing between the roller shaft and the roller cylinder is a rolling bearing (small bearing resistance), while the roller shaft supporting portion is a sliding bearing (large bearing resistance). The bearing resistance of the roller shaft support (sliding bearing structure) can be set larger than the bearing resistance of the bearing (rolling bearing structure) between the roller shaft and the roller cylinder.

  By the way, it is effective that the difference between the bearing resistance of the roller shaft support (slide bearing structure) and the bearing resistance of the bearing (rolling bearing structure) can be properly adjusted.

  Therefore, in the invention of the second aspect, although the rolling bearing resistance of the bearing is substantially constant, the sliding bearing resistance of the roller shaft support portion is changed by changing the relative sliding resistance between the sliding surfaces thereof. It can be adjusted.

  And, in the invention of the second aspect, the difference between the bearing resistance of the rolling bearing portion and the bearing resistance of the sliding bearing portion is changed by changing the sliding bearing resistance (slidability of both sliding surfaces) at the roller shaft supporting portion. Can be adjusted.

[Invention of Claim 3 of the Present Application]
The invention according to claim 3 is the bearing damage detection device according to claim 1 or 2, wherein the roller shaft rotation detection means is a shaft interlocking member that rotates with the roller shaft when the roller shaft rotates at at least one shaft end of the roller shaft. It is characterized by having.

  The shaft interlocking member described in the present application is a member which is supported by being engaged with the roller shaft and rotates with the roller shaft when the roller shaft is rotated.

  In the bearing damage detection device according to the second aspect of the invention, when the bearing is damaged and the roller shaft rotates with the roller cylinder, the shaft interlocking member provided at the shaft end of the roller shaft rotates with the roller shaft. It is possible to mechanically detect (confirm) that the bearing has been damaged by the rotational movement of the interlocking member.

[Invention of Claim 4 of the Present Application]
The invention of claim 4 of the present application is the bearing damage detection device according to claim 3, wherein the roller shaft rotation detection means comprises notification means capable of electrically detecting and notifying the rotation operation of the shaft interlocking member. It is characterized.

  According to the fourth aspect of the present invention, since the roller shaft rotation detection means of the conveyor roller further comprises an electrical notification means (for example, a lamp or a buzzer), when the bearing portion of the conveyor roller is damaged The operation of the notification means can notify that the bearing has been damaged.

[Invention of Claim 5 of the Present Application]
The invention of claim 5 is applied to a belt conveyor in which a plurality of conveyor rollers are used to move the conveyor belt. The invention according to claim 5 of the present application is the bearing damage detection device according to claim 4, wherein each roller shaft rotation detection means provided on a plurality of conveyor rollers is treated as a group of management targets. Two notification means are installed in a shared state, and the notification means shared operates when any one of the roller shaft rotation detection means of the group to be managed detects the rotation operation of the shaft interlocking member It is characterized by having done so.

  If notification means are provided individually for each roller shaft rotation detection means of a large number of conveyor rollers, when any abnormality (bearing damage) occurs in any of the conveyor rollers, the notification means corresponding to the abnormal conveyor roller Since it operates, it is possible to immediately identify the conveyor roller in which the abnormality has occurred, but in this case, the facility cost becomes high as the number of notification means increases.

  Therefore, in the fifth aspect of the present invention, the roller shaft rotation detection means of a plurality of conveyor rollers is a group of management targets, and one notification means is shared with the group of management target portions (a plurality of roller shaft rotation detection means). By installing in the state, the number of used informing means can be significantly reduced.

  In the embodiment of FIG. 12, the total number of conveyor rollers to be managed is set to eight in total, but the number of conveyor rollers is also very large in a large-sized belt conveyor having a very long length (see FIG. 12). For example, since there are 1000 or more), the number of conveyor rollers to be managed in a group may be set to a considerable number of about 30 to 50.

  In the case of the invention according to claim 5, when the notification means of the roller shaft rotation detecting means is activated at the portion to be managed of the group (eight conveyor rollers in the embodiment of FIG. 12), It is necessary to individually check which conveyor roller has become abnormal, but since the number (for example, eight) to be inspected is limited, it is sufficient to inspect only the conveyor roller in the limited range .

[Invention of Claim 6 of the Present Application]
The invention according to claim 6 of the present application is directed to a bearing damage detection member used in the bearing damage detection device for a conveyor roller according to claim 3. The bearing damage detecting member according to the sixth aspect is constituted by the shaft interlocking member according to the third aspect, and the shaft interlocking member comprises the shaft end of the roller shaft and the roller shaft supporting portion of the roller stand. Between the roller shaft and the roller shaft support portion of the roller stand.

  The bearing damage detection member according to the sixth aspect is a shaft interlocking member constituted by a separate member from the roller shaft and the roller stand, and when forming the bearing damage detection device according to the third aspect, the shaft interlocking member is a roller By interposing the shaft end of the shaft and the roller shaft supporting portion of the roller stand, a bearing damage detection function can be achieved.

  And since this axis interlocking member is removable with respect to the roller axis and the roller stand, respectively, when replacing the abnormal conveyor roller, it can be reused as it is as a new conveyor roller.

[Invention of Claim 7 of the Present Application]
The invention according to claim 7 of the present application is the bearing damage detection member according to claim 6, wherein the shaft interlocking member engages with the shaft end of the roller shaft in a non-rotational state while supporting the roller shaft of the roller stand It is characterized in that it comprises an arc-shaped portion which can rotate with respect to the portion, and an arm having a predetermined length.

  In the bearing damage detection member according to the seventh aspect, the arc-shaped portion of the shaft interlocking member is the shaft end of the conveyor roller according to JIS standard product (as shown in FIG. While being able to be held in a non-rotating state, it is rotatably engaged with the roller shaft support of the roller stand.

  On the other hand, since the shaft interlocking member has an arm having a predetermined length, the arm can be used as a means (member) for detecting the roller shaft rotation.

[Invention of Claim 8 of the Present Application]
The invention according to claim 8 of the present application is characterized in that, in the bearing damage detection member according to the above-mentioned claim 7, the arc-shaped portion is provided with a cover member for covering the end face of the roller cylinder in a close state.

  By the way, although a dustproof seal (labyrinth seal or oil seal) is installed on the outer side of the bearing portion of the conveyor roller, foreign matter such as fine dust and the like may infiltrate into the bearing portion from the left and right ends of the roller cylinder There is a tendency to damage the bearings.

  Therefore, the bearing damage detection member according to claim 7 includes a cover member for covering the end surface of the roller cylinder on the shaft interlocking member having a bearing damage detection function, so that the bearing damage detection member (shaft interlocking member) By setting, the dustproof function (protector function) can be provided to the bearing portion of the conveyor roller.

[Effect of the Invention of Claim 1 of the Present Application]
In the bearing damage detection device according to the invention of Claim 1, the roller shaft supporting portion in which the bearing between the roller shaft and the roller cylinder is damaged and the bearing resistance (rolling bearing resistance) of the bearing portion supports the roller shaft end. When the roller cylinder rotates, the roller shaft rotates with the roller cylinder in the roller cylinder rotation direction. Then, when the roller shaft rotates in the roller cylinder rotation direction, the roller shaft rotation detection means of the conveyor roller detects the roller shaft rotation operation, and the detection result can be confirmed.

  Therefore, in the bearing damage detection device according to the invention of claim 1 of the present application, the abnormal state (bearing damage state) of the conveyor roller generated when the bearing is damaged can be confirmed by the roller shaft rotation detection means. Has the effect of being able to easily and reliably.

[Effect of the Invention of Claim 2 of the Present Application]
In the invention of claim 2 of the present application, in the bearing damage detection device of the above-mentioned claim 1, the bearing portion between the roller shaft and the roller cylinder is a rolling bearing (bearing resistance remains unchanged), while the roller shaft supporting portion of the roller stand is slipped Since the bearing (having a variable bearing resistance) is used, the sliding bearing resistance of the roller shaft supporting portion can be adjusted by changing the sliding resistance between the sliding surfaces of the roller shaft supporting portion.

  Therefore, in the bearing damage detection device of the second aspect, in addition to the effect of the first aspect, the rolling bearing portion is changed by changing the sliding bearing resistance (slidability of both sliding surfaces) at the roller shaft supporting portion. The difference between the bearing resistance of the sliding bearing and the bearing resistance of the sliding bearing portion can be adjusted arbitrarily.

[Effect of the Invention of Claim 3 of the Present Application]
In the invention of claim 3 of the present application, in the bearing damage detection device according to claim 1 or 2, the roller shaft rotation detection means detects that the shaft interlocking member provided at the shaft end of the roller shaft has rotated.

  As described above, in the invention of claim 3 of the present application, since the shaft interlocking member having a mechanical configuration is used as the bearing damage detection mechanism of the conveyor roller, in addition to the effects of the above claim 1 or 2, the bearing damage is There is an effect that the detection device can be manufactured simply and inexpensively.

[Effect of the Invention of Claim 4 of the Present Application]
According to the invention of claim 4 of the present application, in the bearing damage detection device according to claim 3, the roller shaft rotation detection means of the conveyor roller has an electrical notification means (for example, a lamp or a buzzer) and the conveyor roller is abnormal. When (the shaft interlocking member rotates with the roller shaft), the notification means of the roller shaft rotation detection means is activated.

  Therefore, according to the fourth aspect of the invention, in addition to the effect of the third aspect, even if it is possible to mechanically detect the bearing damage of the conveyor roller, when the bearing is damaged, the bearing damage state is Since notification can be made, there is an effect that abnormal conveyor rollers can be recognized early and surely (it is possible to cope with abnormalities early).

[Effect of the Invention of Claim 5 of the Present Application]
The invention according to claim 5 of the present application is a belt conveyor in which a plurality of conveyor rollers are used to move a conveyor belt, wherein each roller shaft rotation detecting means provided on a plurality of conveyor rollers is a group of management targets One notification means is installed in a shared state in a group of management target parts, and the common notification means is activated when any one of the roller axis rotation detection means in the group of management operates. I have to.

  Therefore, according to the fifth aspect of the present invention, the number of informing means used is significantly reduced as compared with the case where the informing means is individually installed for each roller shaft rotation detecting means of each conveyor roller. In addition to the effect of (4), there is an effect that the equipment cost of the entire conveyor roller bearing damage detection device can be significantly reduced.

[Effect of the Invention of Claim 6 of the Present Application]
The bearing damage detection member according to the invention of claim 6 of the present application is configured of the shaft interlocking member used in claim 3. The shaft interlocking member serving as the bearing damage detection member according to claim 6 is between the shaft end of the roller shaft and the roller shaft support portion of the roller stand and is opposed to the shaft end of the roller shaft and the roller shaft support portion of the roller stand. Each of the members is configured by separate members which are detachably engaged with each other.

  Therefore, when the shaft interlocking member serving as the bearing damage detection member according to the sixth aspect of the present invention constitutes the bearing damage detection device according to the third aspect, the shaft interlocking member is supported by the shaft end of the roller shaft and the roller shaft of the roller stand By merely interposing the parts, not only the bearing damage detection function of the conveyor roller can be achieved, but also the new conveyor roller can be reused as it is when replacing the abnormal conveyor roller.

[Effect of the Invention of Claim 7 of the Present Application]
According to the invention of claim 7, in the bearing damage detecting member according to claim 6, the shaft interlocking member engages with the shaft end of the roller shaft in a non-rotational state while the roller shaft supporting portion of the roller stand is engaged. And an arm having a predetermined length.

  In the bearing damage detection member according to the seventh aspect, the shaft end receiving portion of the shaft interlocking member can hold the shaft end of the conveyor roller according to the JIS standard in a non-rotating state, while the roller shaft supporting portion of the roller stand is Can be mounted rotatably.

  Therefore, in the bearing damage detecting member according to the seventh aspect, in addition to the effect of the sixth aspect, the shaft interlocking member is provided between the shaft end of the roller shaft and the roller shaft supporting portion of the roller stand without special processing. While being able to intervene, there is an effect that the above-mentioned arm can be used as a means (member) for roller axis rotation detection.

[Effects of the Invention of Claim 8 of the Present Application]
In the invention of claim 8 of the present application, in the bearing damage detection member of claim 7, the shaft interlocking member having a bearing damage detection function is provided with a cover member for covering the end face of the roller cylinder.

  Therefore, in the bearing damage detecting member according to the eighth aspect, in addition to the effect of the seventh aspect, the dustproof function (protector function) is provided to the bearing portion of the conveyor roller simply by setting the shaft interlocking member to the conveyor roller. There is an effect that it can be given.

It is a partial top view of the belt conveyor provided with the bearing damage detection apparatus of 1st Example corresponding to this-application claim 1-3, and this-application claim 6-7. It is an enlarged view of the II-II arrow part of FIG. It is a disassembled perspective view which shows the support structure of the bearing damage detection side (right side) in the center part roller body of the conveyor roller of FIG. It is a disassembled perspective view which shows the support structure of the bearing damage non-detection side (left side) in the center part roller body of the conveyor roller of FIG. It is a principal part expansion perspective view (assembly state figure of FIG. 3) of the bearing damage detection apparatus part used in FIG. It is the VI-VI sectional view of FIG. It is VII-VII sectional drawing of FIG. It is a graph which shows the relationship between the sliding bearing resistance of the roller-shaft support part, and the rolling bearing resistance of a bearing in the bearing damage detection apparatus of 1st Example. It is function explanatory drawing at the time of conveyor roller abnormality (at the time of bearing damage) in the bearing damage detection apparatus of this-application 1st Example. It is a partial top view of the belt conveyor provided with the bearing damage detection apparatus of 2nd Example corresponding to Claim 4 of this application. It is an enlarged view of XI part of FIG. 10, and is function explanatory drawing at the time of conveyor roller abnormality (at the time of bearing damage). It is a partial top view of the belt conveyor provided with the bearing damage detection apparatus of 3rd Example corresponding to Claim 5 of this application. FIG. 13 is an enlarged view of a portion XIII in FIG. 12, and is a function explanatory view at the time of conveyor roller abnormality (at the time of bearing damage); In the modification of FIG. 11 (third embodiment), a partial plan view of a belt conveyor provided with a bearing damage detection device of the fourth embodiment using an optical fiber sensor as a detection means and an optical fiber cable as a signal propagation means It is. It is the FIG. 2 equivalent view of the belt conveyor provided with the bearing damage detection apparatus of this application 5th Example. It is an expanded sectional view of the XVI part of FIG. It is an XVII-XVII arrow line view of FIG. It is a disassembled perspective view which shows the support structure of the bearing damage detection side (right side) in the center part roller body of the conveyor roller of FIG. It is a schematic plan view of the conveyor roller of FIG. It is an enlarged view of XX part of FIG. It is a partial top view of the bearing damage detection apparatus of 6th Example corresponding to Claim 4 of this application for electrically detecting the bearing damage in the conveyor roller of FIG. 15 (5th Example). It is the FIG. 16 equivalent view using the bearing damage detection member (with a cover material) of 7th Example corresponding to Claim 8 of this application. FIG. 23 is a partial exploded perspective view of FIG. 22. It is sectional drawing at the time of applying the bearing damage detection member with a cover material of FIG. 23 to the return side conveyor roller of a belt conveyor. It is the FIG. 2 equivalent view of the conventional belt conveyor. It is explanatory drawing of the axial end of the roller axis | shaft in the conveyor roller of FIG. 25 (conventional) being non-rotatably supported with respect to a roller stand.

  Hereinafter, some embodiments of the present application will be described with reference to the attached FIGS. 1 to 24. FIGS. 1 to 9 show a first embodiment corresponding to claims 1 and 2 of the present application, and FIGS. 11 shows a second embodiment corresponding to claim 3 of the present application, FIGS. 12 to 13 show a third embodiment corresponding to claim 4 of the present application, and FIG. 14 shows a modification of FIG. FIG. 15 shows a fourth embodiment in which a bearing damage detection member different from the bearing damage detection member used in the first embodiment is adopted in FIGS. 15 to 20, and FIG. A sixth embodiment which is a modification of the third embodiment) is shown, and FIGS. 22 to 24 show a seventh embodiment employing another bearing damage detection member.

  Also in the description of each of the following embodiments, "the bearing damage detection device for a conveyor roller" corresponding to each invention of claims 1 to 4 of the present application is simply expressed as "a bearing damage detection device". The "bearing damage detection member used for a conveyor roller" corresponding to each invention of 7 is expressed simply as a "bearing damage detection member".

  The conveyor roller targeted in the present application is mainly used for belt traveling of a belt conveyor as shown in, for example, FIGS. 1 and 2. The belt conveyor shown in FIGS. 1 and 2 is an endless conveyor belt 9 comprising conveyor rollers 1, 1... Located on the upper side and conveyor rollers 1 '(see FIG. 2) located on the lower side. , And endless belts of endlessly wound conveyor belt 9 can be circulated by driving one of the conveyor rollers.

  In each embodiment of the present application, as shown in FIG. 2, three short roller bodies 10 are used as the conveyor roller 1 on the carrier side in order to make the carrier side of the conveyor belt 9 bend in the valley direction in the width direction and travel. , 10, 10 are adopted in a continuous state in the state of refraction at an angle. The conveyor roller 1 'on the return side adopts one long roller body.

  In addition, as shown in FIG. 2, the conveyor roller 1 on the carrier side used in each embodiment of the present application is formed by connecting three short roller bodies 10, 10, 10 continuously. The body 10 has the roller cylinder 12 rotatably attached to the roller shaft 11 via two bearings 13 and 13, respectively. And as shown in FIG. 2, the conveyor roller 1 which makes these three short roller bodies 10, 10, 10 one set stands for both axial ends 11a and 11b of the roller shaft 11 of each short roller body 10 respectively. 2, 2 · · · Support. In the following description, the three short roller bodies 10, 10, 10 are also simply expressed as roller bodies.

[First Embodiment of FIGS. 1 to 9]
The bearing damage detection device according to the first embodiment shown in FIGS. 1 to 9 is provided on all the conveyor rollers 1, 1... On the carrier side shown in FIG. In this first embodiment, the bearing damage detection device is installed only on the carrier side conveyor roller 1, but as in the other embodiments (fifth embodiment of FIG. 15), the return side conveyor roller 1 'is used. The same kind of bearing damage detection device can be installed.

  The bearing damage detection device of the first embodiment has various configurations described below.

  First, as shown in FIGS. 2 to 7, both axial ends 11 a and 11 b of the roller shafts 11 of the roller bodies 10, 10 and 10 in the conveyor roller 1 rotate with respect to the two roller stands 2 and 2 respectively. It is supported as possible. In the carrier-side conveyor roller 1 of FIG. 2, the roller body 10 at the central portion is installed in a horizontal posture, but the two roller bodies 10 and 10 at both end portions are installed in an outward upward inclined state There is.

  One shaft end 11a of the roller shaft 11, as shown in FIG. 3 and FIG. 5 to FIG. 7, is held by the shaft interlocking member 3 (to be described in detail later) relatively nonrotatably, The shaft end 11 a is rotatably supported on the roller stand 2 by supporting the shaft end 11 a in a rotatable manner with respect to the bearing member 4 (described in detail later) attached to the roller stand 2. It can be rotated indirectly via

  The other shaft end 11b of the roller shaft 11 not using the above-mentioned shaft interlocking member 3 is, as shown in FIG. 4, a U-shaped bearing provided on the roller stand 2 via a bearing material 8 (described in detail later). It is rotatably held relative to the unit 24.

  In addition, as shown in FIGS. 3 to 6, each of the shaft ends 11a and 11b of the roller shaft 11 of the roller body 10 of an existing product (JIS standard) is a chamfered portion (notch portion) for anti-rotation 14, 14 are formed. And in the bearing damage detection apparatus of this embodiment, the chamfers 14 and 14 of one shaft end 11a (see FIG. 3) can be functioned as a rotation stopper for the arc-shaped portion 31 (described later) of the shaft interlocking member 3. On the other hand, the chamfered portions 14 and 14 of the other shaft end 11b (see FIG. 4) can be made to function as a rotation preventing member with respect to the arcuate portion 81 (described later) of the bearing material 8.

  As shown in FIG. 3 and FIG. 5 to FIG. 7, the shaft interlocking member 3 is compared with an arc-shaped portion 31 engaged with the shaft end 11 a of the roller shaft 11 and a part of the roller shaft rotation detecting means 5 described later. And a long arm 51.

  The inner surface of the arc-shaped portion 31 of the shaft interlocking member 3 is a U-shaped space 32 in which a part (upper side) is opened (see FIG. 3). The inner surface of the U-shaped space 32 is provided with projections 33 and 33 for fitting the chamfers (notches) 14 and 14 of the shaft end 11 a in a state where the shaft end 11 a of the roller shaft 11 is dropped. It is done. Then, the shaft end 11a is dropped into the U-shaped space 32, and the chamfers 14 and 14 on the side of the shaft end 11a are fitted to the respective projections 33 and 33 on the U-shaped space 32 side. Are held at a fixed position (lowermost portion) in the U-shaped space 32 of the arc-shaped portion 31 so as not to be relatively rotatable. In the state where the shaft end 11a is held by the arc-shaped portion 31 of the shaft interlocking member 3, when an abnormality (damage) occurs in the bearing 13 as described later, the shaft end 11a and the arc-shaped portion 31 (shaft interlocking member 3) will rotate in an integrated state.

  The outer surface 34 of the arc-shaped portion 31 of the shaft interlocking member 3 is an arc surface centered on the axial center of the shaft end 11 a held at a fixed position in the U-shaped space 32.

  In the first embodiment, a U-shaped bearing member 4 whose upper side is opened is interposed between the arc-shaped portion 31 of the shaft interlocking member 3 and the roller stand 2. The bearing member 4 is preferably made of a material having a small coefficient of friction (for example, a synthetic resin material).

  The bearing member 4 is provided with a U-shaped space 41 capable of dropping and supporting the arc-shaped portion 31 of the shaft interlocking member 3 inside. The bottom inner surface of the U-shaped space 41 is a circular arc surface having the same shape and size as the outer surface (circular arc surface) 34 of the circular arc-shaped portion 31 of the shaft interlocking member 3. When the portion 31 is dropped, the outer surface 34 of the arc-shaped portion 31 can be slidably brought into sliding contact with the inner surface of the bottom of the U-shaped space 41. The U-shaped space 41 corresponds to the roller shaft support portion 26 in the claims, and the shaft end 11 a of the roller shaft 11 can be freely rotated via the arc-shaped portion 31 of the shaft interlocking member 3. It can be supported.

  On the opposing outer surfaces of the upper portion of the bearing member 4 are provided projections 42 and 42 which respectively project inward. The respective projections 42, 42 are for assembling the bearing member 4 on the upper portion of the roller stand 2, and are assembled to the roller stand 2 as follows.

  As shown in FIG. 3, the roller stand 2 is provided with an arc-shaped cutout 24 in the upper portion of the front plate 21 and in the same shape and size as the outer surface of the bearing member 4. The fitting grooves 25 and 25 which can each fit each protrusion 42 and 42 of the bearing member 4 are provided in (the front plate 21 side). Then, the outer surface of the bearing member 4 is dropped into the notch portion 24 of the roller stand 2 and the projections 42 and 42 of the bearing member 4 are fitted into the fitting grooves 25 and 25 of the roller stand 2 respectively. It is assembled to the upper part of the stand 2 in a stable posture.

  In the bearing damage detection device according to the first embodiment, the shaft interlocking member 3 having the arm 51 serves as the bearing damage detection member according to claims 6 and 7 of the present application.

  As shown in FIG. 4, the bearing material 8 engaged with the other shaft end 11 b of the roller shaft 11 has a U-shaped arc-shaped portion 81 whose part (upper side) is open. The inner surface of the arc-shaped portion 81 is provided with a U-shaped space 82 whose bottom surface is the same as the outer peripheral surface of the shaft end 11b. The inner surface of the U-shaped space 82 is provided with protrusions 83, 83 for fitting the chamfers (notches) 14 and 14 of the shaft end 11b in a state where the shaft end 11b of the roller shaft 11 is dropped. It is done.

  As shown in FIG. 4, the outer surface of the arc-shaped portion 81 of the bearing material 8 is an arc surface having the same shape and size as the bottom surface of the U-shaped receiving portion 24 provided on the front plate 21 of the roller stand 2. When the arc-shaped portion 81 is dropped into the U-shaped space 24, the outer surface 84 of the arc-shaped portion 81 can be slidably brought into sliding contact with the inner surface of the bottom of the U-shaped space 24. The U-shaped receiving portion 24 of the roller stand 2 in FIG. 4 corresponds to the roller shaft support portion 26 in the claims, and rotates the shaft end 11 b of the roller shaft 11 via the bearing material 8. It can be freely supported.

  Further, flanges 85, 85 projecting outward from the outer surface 84 of the arc-shaped portion 81 are provided at both axial ends of the arc-shaped portion 81, and the outer surface 84 of the arc-shaped portion 81 is on the roller stand 2 side. When dropped onto the bottom of the U-shaped receiving portion 24, the two flanges 85 are positioned on the front and back sides of the U-shaped receiving portion 24 to prevent the bearing material 8 from falling off.

  Then, in FIG. 4, the shaft end 11 b of the roller shaft 11 is dropped into the U-shaped space 82 of the bearing material 8, and each chamfered portion 14, 14 on the side of the shaft end 11 b is each protrusion 83 on the U-shaped space 82 side. , 83, the shaft end 11b can be held at a fixed position (lowermost portion) in the U-shaped space 82 of the arc-shaped portion 81, while the bearing material 8 can be held against the roller stand 2 The shaft end 11 b and the bearing member 8 are rotatably supported on the U-shaped receiving portion 24 of the roller stand 2 by being dropped into the bottom portion of the U-shaped receiving portion 24.

  In the first embodiment, the conveyor roller 1 includes the roller body 10, the roller stand 2, the shaft interlocking member 3, the bearing member 4 and the bearing member 8. The conveyor roller 1 is assembled as follows. It is done.

  The roller body 10 installed in the horizontal posture at the central portion in FIG. 2 will be described by way of example. The roller body 10 includes the shaft interlocking member 3 and the bearing member 4 (FIG. 3) , And 7), while the other shaft end 11b of the roller shaft 11 is supported via the bearing member 8, while being supported by the upper portion (U-shaped receiving portion 24 in FIG. 3) of one roller stand 2 via FIGS. By rotatably supporting the upper portion of the roller stand 2 (the U-shaped receiving portion 24 in FIG. 4), as shown in FIG. In this embodiment, both the left and right roller bodies 10, 10 in FIG. 2 are also installed between the roller stands 2, 2 in an inclined state, and three roller bodies 10, 10, 10 and four roller stands are provided. The two conveyor rollers 1 constitute one. And, the conveyor roller 1 having the three roller bodies 10, 10, 10 is installed by fixing the four roller stands 2, 2... On the common installation table 20 (see FIG. 2) There is.

  A large number of the conveyor rollers 1 (and 1 ') are disposed on the carrier side and the return side at predetermined intervals (for example, 1 m intervals), and the endless conveyor belt 9 is wound around these conveyor rollers 1 and 1'. A series of belt conveyors are configured by turning.

  In the first embodiment, the U-shaped space 41 (see FIG. 3) of the bearing member 4 supports the one shaft end 11a of the roller shaft 11 via the shaft interlocking member 3. Roller shaft support in the claims in which the U-shaped receiving portion 24 (see FIG. 3) of another roller stand 2 supports the other shaft end 11 b of the roller shaft 11 via the bearing member 8. It becomes the part 26.

  The roller shaft support portions 26, 26 for supporting the shaft ends 11a, 11b of the roller shaft 11 are respectively slide bearing structures, while the bearings 13, 13 interposed between the roller shaft 11 and the roller cylinder 12 are It is a rolling bearing structure (content of claim 2 of the present application). And, in the conveyor roller 1 of the first embodiment, the total bearing resistance of the both roller shaft supporting portions 26, 26 (sliding bearing structure) supporting both shaft ends 11a, 11b of the roller shaft 11 is the roller shaft The total bearing resistance of both bearings 13 and 13 (rolling bearing structure) between 11 and the roller cylinder 12 is set larger.

  That is, as shown in the comparison graph of FIG. 8, the total sliding bearing resistance of both roller shaft supporting portions 26 and 26 is, for example, the magnitude of B, while both bearings 13 between the roller shaft 11 and the roller cylinder 12 , 13 (at normal times) as shown by A, the total rolling bearing resistance is considerably small (the difference of B> A is quite large).

  By the way, depending on the use condition of the conveyor roller, the difference between the bearing resistance of the roller shaft support 26 (26) (sliding bearing structure) and the bearing resistance of the bearing 13 (13) (rolling bearing structure) can be set (adjusted) It is effective to

  In this embodiment, although the rolling bearing resistance of the bearing 13 is substantially constant, the sliding bearing resistance of the roller shaft supporting portion 26 is the outer surface 34 of the circular arc portion 31 of the shaft interlocking member 3 and the inner surface of the bearing member 4 in FIG. 41 relative to the outer surface 84 of the bearing member 8 in FIG. 4 and the inner surface of the U-shaped receiving portion 24 of the roller stand 2 (to become the roller shaft support 26). By changing each sliding resistance, it can be changed arbitrarily. On the slide bearing side (roller shaft support 26 side), the outer surface 34 of the arc-shaped portion 31 of the shaft interlocking member 3 shown in FIG. 3 or the outer surface 84 of the arc-shaped portion 81 of the bearing member 8 shown in FIG. The sliding of each sliding portion is performed by interposing a slippery resin material on the inner surface 41 of the bearing member 4 shown in FIG. 3 or the inner surface of the U-shaped receiving portion 24 shown in FIG. The quality can be set (adjusted) in detail.

  As described above, the bearings 13, 13 interposed between the roller shaft 11 and the roller cylinder 12 have a rolling bearing structure, and the roller shaft support portions 26, 26 supporting the shaft ends 11a, 11b of the roller shaft 11 respectively. In the slide bearing structure, the bearing resistance of the slide bearing portion and the bearing resistance of the rolling bearing portion can be made to have a desired difference by changing the bearing resistance of the slide bearing portion (both bearing resistance The difference can be adjusted arbitrarily).

  FIG. 8 is not a graph (B> A) merely showing that there is a large difference in bearing resistance between the bearing 13, 13 which is a rolling bearing and the roller shaft support 26, 26 which is a sliding bearing. The bearing resistances of the bearing bearings 13 and 13 which were small at the beginning of use also gradually increase with the wear of the bearings after a predetermined use period a, and thereafter, the use period b further elapses Then, the bearing is damaged and the bearing resistance is further increased, and in the extreme case, the roller cylinder 12 and the roller shaft 11 do not rotate relative to each other (see point c in FIG. 8). It shows that a large friction is caused to occur with the cylinder 12.

  Therefore, in the configuration of this embodiment, as described above, the bearing resistance of the roller shaft support 26, 26, which is a slide bearing, is based on the bearing resistance value A at the beginning of use of the bearing 13, 13 which is a rolling bearing. Although (fixed value) is set to a bearing resistance value B considerably larger than that, this bearing resistance value B causes, for example, the bearings of the bearing bearings 13 and 13 to be completely damaged as described above, and the roller cylinder 12 And the roller shaft 11 is set to a bearing resistance value smaller by a predetermined value than the maximum bearing resistance value (the bearing resistance value at the point c) at which the roller shaft 11 does not rotate relatively.

  In such a configuration, the roller shaft 12 is rotated by the conveyor belt 9 at a stage slightly before the roller cylinder 12 and the roller shaft 11 stop relative rotation because the bearings of the bearing bearings 13 and 13 are completely damaged. 11 can be rotated, and the roller shaft rotation detection means 5 detects an abnormality of the bearing 13, 13 based on the rotation operation of the shaft interlocking member 3 which rotates in conjunction therewith.

  As a result, according to this embodiment, it is possible to promptly detect and determine that replacement is necessary before the bearing bearings 13 and 13 reach complete damage, and the roller cylinder 12 and the conveyor belt 9. It is possible to prevent the occurrence of heat generation, fire and the like due to the friction between the roller cylinder 12 and the roller shaft 11, and it is not necessary to apply an extra load to the conveyor belt drive motor and the like.

  As described above, the bearing damage detection device according to the first embodiment can notify the inspector via the roller shaft rotation detection means 5 of the rotational operation of the shaft interlocking member 3 that occurs when the bearing 13 is damaged. I have to.

  In the bearing damage detection device of the first embodiment shown in FIGS. 1 to 9, the roller shaft rotation detection means 5 has an arm 51 integrally attached to the shaft interlocking member 3 and one end side (52b) by the arm 51. Side) is composed of a string 52 to be moved forward and backward and an index 54 attached to one end side (free side end) 52 b of the string 52.

  In the conveyor roller 1 used in the first embodiment, the shaft interlocking member 3 with the arm 51 (see FIG. 4) is attached to the three roller bodies 10, 10, 10 (see FIG. 2), The bearing damage detection device operates when abnormality (damage) occurs in any one of the bearings 13 of the roller bodies 10, 10, 10, but in the first embodiment, the cord 52 and the above are used. Each index 54 is shared by one.

  The arm 51 is fixed to one end of the arc-shaped portion 31 in the axial direction, and has a predetermined length (25 in the first embodiment) opposite to the opening direction of the U-shaped space 32 (lower side). ~ 30 cm) extended. The tip end portion of the arm 51 is provided with a string through hole 51 a through which the string 52 is inserted. Then, when the bearing 13 is damaged and the shaft interlocking member 3 (the arc-shaped portion 31) rotates with the roller shaft 11, the arm 51 rotates the roller cylinder as shown by the broken line in FIG. 5 and FIG. It swings in the direction. The swing range of the arm 51 in the roller cylinder rotation direction may be, for example, in the range of about 30 ° to 60 ° from the lowermost position, and further swinging of the arm is performed by a stopper (not shown) at the swing position. You should prohibit it.

  The cord 52 is made of flexible and strong material (for example, nylon fiber). As shown in FIG. 2, one end 52a of the cord 52 is fixed to the roller stand 2 at one end (left end in FIG. 2) with a fixing tool 55, and the middle part is laid in a straight line without slack. The other end 52b is stretched so as to be movable forward and backward at a position beyond the roller stand 2 at the other end (right end in FIG. 2). Further, the middle portion of the cord 52 supports a plurality of places by guides 53, 53,... And passes through the window holes 23 of the roller stand 2, and further, each arm (three) 51, 51, 51 The string through holes 51a are also inserted respectively.

  And in this cord 52, any shaft interlocking member 3 of each roller body 10, 10, 10 rotates with the shaft end 11a, and any arm 51 is as shown by reference numeral 51 '(see FIGS. 5 and 7). When the arm 51 swings, the part held in the cord through hole 51a of the arm 51 is bent in the shape of "字形" as indicated by the reference numeral 52c, and the free end 52b of the cord 52 is inward. It is designed to be attracted.

  The index 54 is attached to the free end 52b of the string 52. The attachment position of the index 54 is set at a position outside the roller stand 2 located at the right end of FIG. ing.

  In this first embodiment, the same roller shaft rotation detecting means 5 is individually used for each of the conveyor rollers 1, 1... And each conveyor roller in which an abnormality (damage) occurs in the bearing 13 as described later It can be individually detected.

  The bearing damage detection device of the first embodiment shown in FIGS. 1 to 9 functions as follows.

  First, when the bearing 13 of the conveyor roller 1 (each roller body 10) is normal, the rolling bearing resistance B of the bearing 13 is considerably smaller than the sliding bearing resistance A of the roller shaft support 26 as shown in the graph of FIG. In the operating state, the roller cylinders 12 of the roller bodies 10 roll on the roller shaft 11 in a substantially no-load state by the contact of the conveyor belt 9. At this time, the shaft interlocking member 3 provided in each roller body 10 is immobile (the arm 51 does not swing), and the roller shaft rotation detection means 5 is in a non-detection state. Thus, the indicia 54 attached to the free end 52b of the cord 52 remains at the reference position 50 (see FIG. 1).

  On the other hand, when the bearings 13 of the conveyor roller 1 (each roller body 10) start to be damaged (the bearing damage start point a in FIG. 8), the rolling bearing resistance B gradually increases from the state of Ba in FIG. Go. Then, when the degree of damage advances and the rolling bearing resistance Bb of the bearing 13 reaches the magnitude of the sliding bearing resistance A of the roller shaft support portion 26 (reaching point b) As the resistance Bc increases, the roller shaft 11 rotates with the roller cylinder 12, whereby the shaft interlocking member 3 also rotates with the roller shaft 11.

  Then, the arm 51 of the shaft interlocking member 3 is swung by a predetermined angle (for example, in the range of 30 ° to 60 °) in the roller cylinder rotation direction as shown by the broken line in FIG. 5 and FIG. , And a part of the cord 52 is bent in the shape of "ku" (see reference numeral 52c), and the cord 52 is attached to the other end (free end) 52b of the cord 52 in a fixed relation. The index 54 is pulled inward from the original reference position 50 (see FIGS. 5 and 8) by a predetermined length L (L = e.g. 10 to 15 cm) (the index 54 is at the position 54 'in FIG. 5). Moving). The pull-in length L of the index 54 can be easily identified visually by the inspector.

  And, in the belt conveyor equipped with the bearing damage detection device of the first embodiment, the inspector periodically patrols and monitors for abnormality detection of the conveyor roller, but in this case, the monitoring target is each index 54, 54 · · · By visually observing whether or not the respective indexes 54, 54 ··· are drawn inward from the reference position 50, it is possible to confirm the presence or absence of the bearing damage of the respective conveyor rollers 1, 1 · · · . In the example of FIG. 9, each roller body 10, 10, 10 of the conveyor roller 1 on the right side is normal (the index 54 remains at the reference position 50), but the index 54 is pulled inward. It is known that an abnormality (bearing damage) has occurred in any of the roller bodies 10 of the conveyor roller 1, and the three roller bodies 10, 10, 10 of the conveyor roller 1 that have found the abnormality rotate normally. It is possible to identify the abnormal roller body 10 by visually observing whether or not it is present. When the abnormal roller body 10 is specified, the operation is temporarily stopped and the abnormal roller body 10 is replaced with a new one. At this time, the shaft interlocking member 3 and the bearing material 8 can be reused as they are for the new roller body. .

  As described above, in the bearing damage detection device according to the first embodiment shown in FIGS. 1 to 9, when the bearing 13 of the conveyor roller 1 (each roller body 10) is damaged, the roller shaft 11 rotates with the roller cylinder 12 Further, the shaft interlocking member 3 is also rotated together with the roller shaft 11 in conjunction with the rotation of the roller shaft 11, and the rotation operation of the shaft interlocking member 3 is performed by the roller shaft rotation detecting means 5 (arm 51, string 52, indicators 54 and the like are detected, and the inspector looks at the detection results (movement of the indicators 54) so that an abnormality (bearing damage) of the conveyor roller 1 can be confirmed.

  Therefore, in the bearing damage detection device of the first embodiment, the inspector can confirm the abnormal state of the conveyor roller 1 generated when the bearing 13 is damaged by the shaft interlocking member 3 and the roller shaft rotation detection means 5 There is a function that the detection of the conveyor roller can be carried out simply and reliably, and by constructing the abnormality detection mechanism of the conveyor roller mechanically, the bearing damage detection device can be manufactured simply and inexpensively.

  Also, the abnormal conveyor roller (roller body 10) is replaced with a new one, but at that time the shaft interlocking member 3 (which becomes the bearing damage detection member of claims 5 and 6) remains the same as the new conveyor roller (roller body 10). It can be reused.

[Second embodiment of FIGS. 10 to 11]
FIGS. 10 and 11 show a bearing damage detection apparatus according to a second embodiment of the present invention. In this second embodiment, the bearing damage detection apparatus according to the first embodiment is different from each other. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • It is made to be able to notify by 6.

  In the second embodiment shown in FIGS. 10 and 11, the conveyor rollers 1, 1... Are the same as those of the first embodiment, and further, as the roller shaft rotation detecting means 5, an arm 51 is mounted on the shaft interlocking member. In the same manner as in the first embodiment, the arm 52 is provided so that the cord 52 can be bent in the shape of "」 "so that the free end 52b of the cord 52 can be pulled inward. is there.

  In the second embodiment, the notification means 6 employed in the roller shaft rotation detection means 5 includes a movable piece 61 attached to the free end 52b of the string 52, and a detector operated by the movable piece 61 For example, it has a limit switch 62 and an alarm 63 for electrically notifying when the detector 62 is activated. A buzzer or a lamp is adopted for the alarm 63.

  Then, in the bearing damage detection device according to the second embodiment, as shown in FIG. 11, when damage occurs to any one of the bearings 13 (see the first embodiment) of the roller bodies 10, 10. The arm 51 swings so that a part of the cord 52 bends in a '-' shape (see reference numeral 52c), but at this time the movable piece 61 is drawn inward to a position shown by a broken line (reference numeral 61 '). . Then, the pulled-in movable piece 61 'operates the actuator 62a of the detector 62 as indicated by a reference numeral 62a' to turn on the detector 62, and the detection signal from the detector 62 causes the annunciator 63 to operate. It is made to operate | move and to alert | report circumference | surroundings that abnormality generate | occur | produced to the conveyor roller 1. FIG.

  Thus, in the bearing damage detection device according to the second embodiment shown in FIGS. 10 and 11, the indicator 63 (for example, a lamp, a buzzer, etc.) electrically connected to the roller shaft rotation detection means 5 of each of the conveyor rollers 1, 1. ) And when any one of the bearings 13 of the plurality of conveyor rollers 1 becomes abnormal (damaged), the alarm 63 that detects the abnormality operates and thus the conveyor roller 1 becomes abnormal. Can be identified reliably and at an early stage, and an electrical notification means 6 is added even if abnormality of the conveyor roller 1 can be detected by the rotation operation (mechanical method) of the shaft interlocking member 3. In the above, there is a function that the abnormal conveyor roller can be recognized easily and surely.

[Third Embodiment of FIGS. 12 to 13]
FIGS. 12 and 13 show a bearing damage detection apparatus according to a third embodiment of the present invention. In this third embodiment, in the bearing damage detection apparatus according to the second embodiment, .. With a plurality of conveyor rollers 1, 1... Provided as a group of management targets, and one notification means 6 is installed in a shared state in the group of management target parts, When any one of the shaft interlocking members 3 (see the first embodiment) of the group of managed objects is rotated, the notifying means 6 shared is activated.

  In the third embodiment shown in FIGS. 12 and 13, the conveyor rollers 1, 1... Are the same as those of the first embodiment, and an arm 51 is mounted on the shaft interlocking member as the roller shaft rotation detecting means 5. It is also the same as that of the first embodiment that the arm 52 is provided and the cord 52 is bent in the shape of "く" so that the free end 52b of the cord 52 can be retracted. Employing the notification means 6 for electrically notifying the operation of the roller shaft rotation detection means 5 is the same as that of the second embodiment.

  By the way, as in the second embodiment (FIG. 10, FIG. 11), the notification means 6 is provided individually for each roller shaft rotation detection means 5, 5... Of the plurality of conveyor rollers 1, 1. If an abnormality occurs in any of the conveyor rollers, the notification means 6 corresponding to the abnormal conveyor roller operates, so that the conveyor roller in which the abnormality has occurred can be identified immediately. In this case, the number of notification means 6 The equipment cost is increased by increasing the

  Therefore, in the third embodiment (FIG. 12, FIG. 13), a plurality of roller shaft rotation detecting means 5 provided on each of the conveyor rollers 1, 1. By installing one informing means 6 in a shared state in a part (a plurality of roller shaft rotation detecting means 5, 5,...), The number of using informing means 6 is significantly reduced. .

  The number of conveyor rollers 1 to be managed by a group of bearings in the bearing damage detection apparatus according to the third embodiment is eight in total in the range indicated by the symbol M in FIG. 12, but the number of managed objects in this group is particularly limited. It is not a thing. For example, in a large-sized belt conveyor with a very long length, the number of conveyor rollers is also very large (for example, there are 1000 or more), and the number of conveyor rollers to be managed is about 30 to 50 It can also be set to a large number.

  A configuration in which a plurality of (eight in the illustrated example) conveyor rollers 1, 1 ··· each roller shaft rotation detecting means 5, 5 ··· are managed as a group is shown in Fig. 12 in the third embodiment. Thus, a wire 64 of a predetermined length (for example, about 7 to 10 m) is movably installed on one side of the conveyor belt 9 in the longitudinal direction, and each of the conveyor rollers 1, 1. The free ends 52 b of the cords 52, which are a part of the shaft rotation detecting means 5, are fixed to the wire 64 by the connecting tool 66.

  The wire 64 has a property of maintaining a straight state that does not bend. And, the wire 64 is installed so that it can be moved in the longitudinal direction of the wire while being guided by the guides 65, 65,... On the side of the conveyor belt 9.

  Then, when the roller shaft rotation detection means 5 of any one of the conveyor rollers 1, 1 ... detects a bearing damage, a part of the cord 52 of the roller shaft rotation detection means 5 is bent in a "く" shape. (The code 52c in FIG. 13), the wire fixing portion (connector 66) at the free end 52b of the string 52 is displaced as in the code 66 '(see Only move to the left.

  In this third embodiment, one informing means 6 is made to correspond to each wire 64. The notifying means 6 has a detector (for example, limit switch) 62 operated by the movable piece 61 fixed to the wire 64, and a notifier 63 electrically notifying when the detector 62 operates. .

  Then, in the bearing damage detection device of the third embodiment, as shown in FIG. 13, when an abnormality occurs in the bearing 13 (see the first embodiment) of any of the roller bodies 10, 10,. The arm 51 swings so that a part of the cord 52 is bent in the shape of “(” (see reference numeral 52 c), but at this time, the connector 66 which connects the free end 52 b of the cord 52 to the wire 64 Is drawn to the position of the code 66 '. Then, the movable piece 61 fixed to the wire 64 moves to the position indicated by the reference numeral 61 ', whereby the movable piece 61' operates the actuating element 62a of the detector 62 as indicated by the reference numeral 62a '. That the conveyor 62 is turned on and the annunciator 63 is operated by the detection signal from the detector 62, and an abnormality occurs in any of the conveyor rollers 1 of a group of management targets in the range of the code M (see FIG. 12). Will be reported to the surroundings.

  In the case of the third embodiment, when the notification means 6 of the roller shaft rotation detection means 5 is activated in the portion to be managed of a group (eight conveyor rollers in the embodiment of FIG. 12) It is necessary to individually check which of the eight conveyor rollers 1 has become abnormal, but since the number (for example, eight) to be inspected is limited, the conveyor rollers in the limited range You only need to check

  In the third embodiment shown in FIGS. 12 and 13, each roller shaft rotation detecting means 5 provided on a plurality (eight in FIG. 12) of conveyor rollers 1 is a group of management target portions One informing means 5 is installed in a shared state in the range of the code M).

  Therefore, in the bearing damage detection device according to the third embodiment, the notification means 5 is provided in comparison with the case where the notification means is individually installed for each roller shaft rotation detection means of each conveyor roller as in the second embodiment. The number of bearings used can be significantly reduced, and the facility cost of the entire bearing damage detection device can be significantly reduced.

[Fourth embodiment of FIG. 14]
In the bearing damage detection apparatus according to the fourth embodiment of FIG. 14, it is possible to detect abnormalities (bearing damage) of the conveyor rollers 1, 1. Same as the case of the second embodiment or FIG. 12 (third embodiment), but in the fourth embodiment of FIG. The optical fiber sensors 71 detect the signals detected by the respective optical fiber sensors 71 via the common optical fiber cable 72 to the remote monitoring building 7 where they are transmitted via the controller 70. Centralized monitoring.

  In this fourth embodiment (FIG. 14), even when there is no electrical installation in the vicinity of the belt conveyor, it is possible to centrally monitor abnormalities (bearing damage) of the conveyor rollers 1, 1. An abnormality monitoring system using this kind of optical fiber sensors 71, 71 and so on and an optical fiber cable 72 has conventionally been adopted in various fields.

[Fifth Embodiment of FIGS. 15 to 20]
The bearing damage detection device according to the fifth embodiment of FIGS. 15 to 20 shows a modification of the bearing damage detection device according to the first embodiment (FIGS. 1 to 9).

  In the bearing damage detection device according to the fifth embodiment, the shaft end 11a of the roller shaft 11 and the U-shaped receiving portion 24 of the roller stand 2 (roller shaft support for detecting the bearing damage of the conveyor rollers 1, 1. The shaft interlocking member 3 is rotated as the roller shaft rotation detection means 5 that detects that the roller shaft 11 has rotated while interposing the shaft interlocking member 3 that rotates with the roller shaft 11 with the portion 26). , And an indicator 54.

  The shaft interlocking member 3 used in the bearing damage detection device of the fifth embodiment has substantially the same basic function as that of the first embodiment (see FIG. 4), but the fifth embodiment is used As shown in FIGS. 16 to 18, the shaft interlocking member to be mounted is provided at an end portion of the outer surface 34 of the arc-shaped portion 31 having an arc shape receiving the shaft end 11a of the roller shaft 11 And a short arm 51. In the shaft interlocking member 3, the inner surface of the arc-shaped portion 31 is a U-shaped space 32, and the chamfered portion (notched portion) of the shaft end 11 a of the roller shaft 11 on the inner surface of the U-shaped space 32. The provision of projections 33, 33 for fitting 14, 14 is the same as in the first embodiment.

  The protruding length of the arm 51 is relatively short, for example, about 3 to 4 cm from the axial center of the U-shaped space 32 of the arc-shaped portion 31, and as shown in FIG. 16 to FIG. , 22 can be rotated inside the flat U-shaped roller stand 2.

  At the end of the arc-shaped portion 31 on the opposite side to the arm 51 attachment side, a drop-off preventing flange 36 projecting outward from the outer surface 34 of the arc-shaped portion 31 is provided.

  The shaft interlocking member 3 used in the fifth embodiment is detachably mounted by being dropped directly to the U-shaped receiving portion 24 of the roller stand 2. Therefore, in the fifth embodiment, the bearing member 4 of the first embodiment is not used (the number of parts can be reduced). In this case, the inner surface of the bottom of the U-shaped receiving portion 24 of the roller stand 2 and the outer surface 34 of the arc-shaped portion 31 are arc surfaces of the same size, and the roller shaft 11 rotates during operation as described later. Then, the outer surface 34 of the arc-shaped portion 31 slides directly on the inner surface of the bottom of the U-shaped receiving portion 24. In the fifth embodiment, the U-shaped receiving portion 24 of the roller stand 2 corresponds to the roller shaft supporting portion 26 in the claims.

  In the bearing damage detection device of the fifth embodiment, the same shaft interlocking member 3 (see FIG. 18) with the arm 51 is used for both shaft ends 11a and 11b of one roller body 10. Also in the case of the fifth embodiment, although the bearing material 8 shown in FIG. 4 may be used for the shaft end 11b on the side where the bearing damage is not detected, the same shaft interlocking with the shaft ends 11a and 11b on both sides respectively If the members 3 and 3 are used, they can be shared left and right in one shape (the number of manufactured members can be reduced by half).

  And in this 5th Example, between the shaft end 11a, 11b of each side of the roller shaft 11, and the U-shaped receiving part 24 (it becomes the roller shaft support part 26) of each roller stand 2, 2. The conveyor roller 1 is configured by interposing the same shape shaft interlocking members 3 and 3 as shown in FIG. 18 respectively. The damage to the bearing may be detected by one shaft interlocking member 3.

  As the wire 56 for transmitting the rotational movement of the shaft interlocking member 3, in this embodiment, one having a structure in which the inner wire can slide in the outer tube is used. The outer tube of the wire 56 is held so as not to move in the longitudinal direction.

  In the bearing damage detection device of the fifth embodiment, one wire 56 is used for each shaft interlocking member 3, 3, 3 on the bearing damage detection side of each of the three roller bodies 10, 10, 10 (A total of three wires 56 are used for one conveyor roller 1).

  In the assembled state of the bearing damage detection device shown in FIGS. 15-17, the respective wires 56, 56, 56 lock the wire proximal end 56a to the distal end of the arm 51 of the shaft interlocking member 3 with the locking tool 51b. The wire middle portion (outer tube) is fixed by the stopper 57 in the lower surface side space portion 20a of the installation table 20, and the wire tip portion 56c is extended outward from the roller stand 2 at the right end of FIG. And, on the wire tip end portion 56c, an indicator 54 which is easy to visually recognize is attached outside the roller stand 2 at the right end. FIG. 19 is a plan view of the conveyor roller 1 of FIG. 15, in which three indicators 54, 54 and 54 are positioned at the reference position 50 respectively.

  In the bearing damage detection apparatus of the fifth embodiment, when the bearing 13 of any roller body 10 is damaged and the bearing resistance of the bearing 13 portion becomes larger than the bearing resistance at the roller shaft support 26 on the roller stand 2 side, The shaft interlocking member 3 is also rotated by the rotation of the roller shaft 11 with the roller cylinder 12 in substantially the same manner as in the first embodiment.

  Then, as shown in FIG. 17, the arm 51 rotates in the roller cylinder rotation direction within an angle range of, for example, about 90.degree. So that the arm 51 changes from a downward posture to a dashed line (reference numeral 51 '). The base end of the inner portion) is pulled up by a predetermined length L (in the case of this embodiment, L = 3 to 4 cm, for example). At this time, the index 54 provided at the wire tip portion 56c of the operated wire 56 is pulled inward from the reference position 50 by a predetermined length L as shown by a broken line in FIG. Then, when the inspector visually recognizes the pull-in movement of the index 54, it can be confirmed that the bearing 13 of the roller body 10 of the conveyor roller 1 is damaged. The remaining structure and functions of the fifth embodiment are similar to those of the first embodiment, and thus the description of the first embodiment is incorporated.

  In the bearing damage detection device of the fifth embodiment, bearing damage can be individually detected for the three roller bodies 10, 10, 10 of one conveyor roller 1, so any index 54 moves By visually observing the height, it is possible to identify which of the three roller bodies 10, 10, 10 has become abnormal.

  In the fifth embodiment, as shown in FIG. 15, the shaft end of the return side conveyor roller 1 'is also provided with the same kind of shaft interlocking member 3 functioning as a bearing damage detection device, a wire 56 and an index 54. Even if the bearing 13 of the return side conveyor roller 1 'is damaged, the damage can be detected.

[Sixth Embodiment of FIG. 21]
The sixth embodiment of FIG. 21 corresponds to claim 3 of the present invention, as in the second embodiment (FIGS. 10 and 11), as in the second embodiment (FIGS. 10 and 11). is there.

  In the sixth embodiment (FIG. 21), flexible flexible cords 59, 59, 59 are connected to the respective distal end portions 56c of the three wires 56, 56, 56 via connectors 58, respectively. The tips of the cords 59, 59, 59 are connected to the common movable piece 61, and the movement (reference numeral 61 ') of the movable piece 61 is notified means 6 (detection as in the second embodiment (FIG. 10, FIG. 11) Device 62 and an alarm device 63). That is, when the bearing of the roller body 10 is damaged, the connector 58 portion connecting the tip portion 56c of the wire 56 (the upper wire in FIG. 21) of the abnormal roller body 10 is moved inward to the position 58 '. At that time, the movable piece 61 moves to the position of the code 61 'through the flexible cord 59, and the movable piece 61' operates the actuating element 62a of the detector (limit switch) 62 (code 62a '). The detector 62 is turned on, and the alarm 63 is operated by a detection signal from the detector 62 to notify the surrounding area that the conveyor roller 1 has an abnormality (bearing damage). The electrical notification means 6 is provided for each conveyor roller 1 one by one.

  In another embodiment, the electrical notification means 6 of FIG. 21 is developed, and a plurality (for example, eight) of the third embodiment (FIGS. 12 to 13) corresponding to claim 4 of the present application are provided. Each of the roller shaft rotation detecting means provided on the conveyor roller in (1) may be a group of management targets, and one notification means 6 may be installed in a shared state in the management target portion of the group.

  Furthermore, in another embodiment, in place of the electrical notification means 6 of FIG. 21, a monitoring device 7 using an optical fiber sensor 71 and an optical fiber cable 72 shown in FIG. 14 may be employed.

[Seventh embodiment of FIGS. 22 to 24]
In the seventh embodiment shown in FIGS. 22 to 24, the shaft interlocking member 3 used in the fifth embodiment (FIG. 15 to FIG. 20) is used as the bearing damage detection member for detecting bearing damage. What attached the cover material 37 covered with a minute space | interval is employ | adopted. The shaft interlocking member 3 with the cover member 37 of the seventh embodiment corresponds to the bearing damage detection member of claim 7 of the present application.

  In the bearing damage detection apparatus of the seventh embodiment (FIGS. 22 to 24), the same as the fifth embodiment (FIGS. 15 to 18) except that the cover member 37 is provided on the shaft interlocking member 3 It is.

  By the way, although a dustproof seal (labyrinth seal or oil seal) 17 is installed on the outside of the bearing 13 portion of the conveyor roller 1, dust or the like is minutely transferred from the left and right end portions of the roller cylinder 12 to the bearing 13 portion. There is a possibility of intrusion (the bearing 13 is liable to be damaged).

  Therefore, as in the seventh embodiment (FIGS. 22 to 24), when the shaft interlocking member 3 with the cover member 37 is adopted as the bearing damage detection member, the shaft interlocking member 3 part is the third in the installed state shown in FIG. Since the end face of the roller cylinder 12 is covered with a minute interval by the cover member 37 while functioning similarly to the fifth embodiment, a dustproof function can be given to the bearing 13 of the conveyor roller (roller body 10) .

  In the belt conveyor, the dust scattered from the conveyor belt 9 is greater near the return side conveyor roller 1 '(the conveyor belt conveying surface with a large amount of dust adhesion is downward), so the bearing damage of the seventh embodiment When the shaft interlocking member 3 with the cover member 37 serving as a detection member is used for the return side conveyor roller 1 'as shown in FIG. 24, the protection function against dust intrusion is enhanced.

  1 is a conveyor roller, 2 is a roller stand, 3 is a shaft interlocking member, 4 is a bearing member, 5 is a roller shaft rotation detecting means, 6 is a notifying means, 7 is a monitoring device, 9 is a conveyor belt, 10 is a roller body, 11 11 is a roller shaft, 12 is a roller cylinder, 13 is a bearing, 31 is a circular arc, 37 is a cover member, 50 is a reference position, 51 is an arm, 52 is a cord, 54 is an index, 61 is an index The movable piece 62 is a detector, 63 is an alarm, and 64 is a wire.

Claims (8)

A conveyor roller comprising: a roller cylinder rotatably mounted on a roller shaft via a bearing, and both shaft ends of the roller shaft being supported by a roller shaft supporting portion of a roller stand;
Both shaft ends of the roller shaft are rotatably supported in a state of having a bearing resistance greater than the normal bearing resistance of the bearing with respect to the roller shaft support portion of the roller stand, respectively
In the conveyor roller, the roller bearing is damaged, the bearing resistance of the bearing becomes larger than the bearing resistance of the roller shaft support portion, and the roller shaft rotation operation can be detected when the roller shaft rotates with the roller cylinder. Equipped with roller shaft rotation detection means,
Conveyor roller bearing damage detection device characterized in that. While the bearing between the roller shaft and the roller cylinder is a rolling bearing, the roller shaft support of the roller stand is a sliding bearing.
An apparatus for detecting damage to a conveyor roller according to claim 1, characterized in that: The roller shaft rotation detection means includes a shaft interlocking member that rotates with the roller shaft when the roller shaft rotates.
The bearing damage detection device for a conveyor roller according to claim 1 or 2, characterized in that: The roller shaft rotation detection means includes notification means capable of electrically detecting and notifying rotation operation of the shaft interlocking member.
An apparatus for detecting damage to a conveyor roller according to claim 3, characterized in that: In a belt conveyor configured to move a conveyor belt using a large number of the conveyor rollers,
Setting each of the roller shaft rotation detection means provided on the plurality of conveyor rollers as a group of management targets, and installing one notification means in a shared state in the management target portion of the group;
When any one of the roller axis rotation detecting means of the group to be managed detects the rotation operation of the shaft interlocking member, the notifying means shared by the operation is operated.
An apparatus for detecting damage to a conveyor roller according to claim 4, characterized in that: A bearing damage detection member used in the conveyor roller bearing damage detection device according to claim 3, comprising:
The bearing damage detection member is constituted by the shaft interlocking member,
The shaft interlocking member is between the shaft end of the roller shaft and the roller shaft supporting portion of the roller stand, and is detachably engaged with the shaft end of the roller shaft and the roller shaft supporting portion of the roller stand. Composed of separate members,
Bearing damage detection member used for a conveyor roller characterized by the above. The shaft interlocking member engages with the shaft end of the roller shaft in a non-rotational state, while the arc-shaped portion rotatable with respect to the roller shaft supporting portion of the roller stand and an arm having a predetermined length And with
A bearing damage detection member used for a conveyor roller according to claim 6, characterized in that: The shaft interlocking member includes a cover member for covering the end face of the roller cylinder in the proximity state to the arc-shaped portion.
A bearing damage detection member used for a conveyor roller according to claim 7, characterized in that:

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