JPH071336Y2 - Hoist dropout prevention device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a hoist including a traveling roller rotatably arranged on a monorail and a hoist body connected to the traveling roller by a connecting member, and is provided so as to be movable integrally with the hoist body. The present invention relates to a fall prevention device having an auxiliary roller provided so as to be able to roll on an upper surface of a traveling roller. More specifically, the present invention relates to a structure in which this auxiliary roller can be easily attached to and removed from the hoist.

[Prior art]

Conventionally known hoists are, for example, those disclosed in JP-A-61-51483. As shown in FIG. 5, the hoist extends downward from a rail mounting portion 30 such as a support structure and has a lower end bent laterally to form a traveling surface portion 32, and a monorail 31 above the traveling surface portion 32 of the monorail 31. And a hoist body 35 connected to the running roller 33 via a connecting member 34. By the way, in such a hoist, there is a risk that the traveling roller 33 may come off the traveling surface portion 32 of the monorail 31 and the hoist main body 35 may drop, and may damage peripheral devices. In particular, when the hoist is obliquely suspended, that is, when the hoist is suspended at an angle with respect to the vertical direction, the risk of the traveling roller 33 coming off becomes even greater. Therefore, the hoist shown in FIG. 5 is provided with an auxiliary roller 36 in order to prevent the traveling roller 33 from falling off. The auxiliary roller 36 is held by the connecting member 34,
The lower surface of an upper flange 37 extending laterally from the upper end of 31 is provided so as to be rollable.

[Problems to be solved by the device]

However, the auxiliary roller 36 of the hoist shown in FIG. 5 is irremovably attached to and held by the connecting member 34. Therefore, the traveling roller 33 should be
The auxiliary roller 36 may collide with the lower surface of the upper flange portion 37 of the monorail 31 when it is placed on the running surface portion 32 of the monorail 31, and the workability is poor. Also, when removing the traveling roller 33 from the monorail 31 for repair or inspection, the auxiliary roller 36
Rubs against the upper flange 37, resulting in poor workability. Further, even if the auxiliary roller 36 is configured to be attachable / detachable independently in order to solve the problem of the hoist of FIG. 5, if it requires a tightening operation by a tool such as a bench, a nuclear facility, etc. It is not practical in an environment where it is necessary to attach and detach by remote control using a manipulator, etc. SUMMARY OF THE INVENTION An object of the present invention is to provide a hoist dropout prevention device that allows an auxiliary roller to be easily attached to and detached from a hoist on a monorail.

[Means for Solving the Problems]

In order to achieve this purpose, the hoist fall-out prevention device of the present invention is capable of rolling on a monorail having a running surface formed by extending downward from the rail mounting portion and laterally bending the lower end, and above the running surface of the monorail. Provided for the traveling roller, a hoist main body connected to the traveling roller by a connecting member, and an auxiliary roller traveling surface above the traveling roller that can move integrally with the hoist body. A hoist including an auxiliary roller, a horizontal shaft, an auxiliary roller rotatably provided at one end of the horizontal shaft, and one or more plate-shaped fitting portions provided at an intermediate portion of the horizontal shaft. And a lever formed at the other end of the abscissa extending in substantially the same plane direction as the fitting insertion portion, and a falling prevention tool, and a plate extending in the hoist running direction and arranged in parallel by the number of fitting insertion portions. Provided on the plate part and the plate part Insertion portion is provided with a support hole which is supported, and a slit of larger width than the thickness of the insertion portion fitting it is toward the end face of the plate portion to the support hole, and a set portion formed of.

[Action]

Therefore, when the auxiliary roller is attached to the hoist on the monorail, the flat-shaped fitting insertion portion of the fall prevention tool is laid sideways and inserted into the slit of the installation portion. When the insertion part completely enters the support hole, the lever rotates vertically due to its own weight, and as a result of the lever and the horizontal shaft rotating together, the insertion part is held in the vertical posture and the slit I will not get out. On the other hand, when removing the auxiliary roller from the hoist on the monorail, the lever is rotated upward so that the fitting insertion portion lies sideways and is pulled out through the slit.

【Example】

An embodiment of the hoist dropout prevention device of the present invention will be described below with reference to FIGS. FIG. 1 shows a hoist equipped with a hoist dropout prevention device of the present invention. The hoist includes a monorail 2 which is formed by extending downward from a rail mounting portion, for example, a ceiling 1, and a lower end extending laterally, a traveling roller 3 which is rollably arranged on the monorail 2, and the traveling. A hoist body 6 connected to the work roller 3 by a connecting member, for example, hanging devices 5a and 5b, and a fall prevention device 9 having an auxiliary roller 10 that can be attached / detached using the hanging devices 5a and 5b as an installation portion. Become. Here, as shown in FIG. 2, the falling prevention tool 9 has a horizontal axis 11
And an auxiliary roller 10 rotatably provided at one end of the horizontal shaft 11, and plate-like fitting insertion portions 12a and 12b provided at an intermediate portion of the horizontal shaft 11 at intervals of, for example, two. Fitting parts 12a, 12
It includes an axial movement prevention portion 11b provided between b and a lever 13 formed at the other end of the horizontal shaft 11 so as to extend in the same plane direction as the insertion portions 12a and 12b. On the other hand, the suspenders 5a and 5b extend in the traveling direction of the hoist body 6 and are fitted into the fitting portions 12a and 12b, as shown in FIGS.
(2 in this example) the number of plate parts installed in parallel,
It comprises a support hole 14 for supporting the fitting portions 12a, 12b, and a slit 15 formed from the end faces of the suspenders 5a, 5b toward the support hole 14. As described above, in the present embodiment, the suspenders 5a and 5b having the support holes 14 and the slits 15 correspond to the installation portions to which the fall prevention tool 9 is attached. The slit 15 is formed such that its width is slightly larger than the thickness of the fitting insertion portions 12a and 12b, and is formed so that it can easily pass through the lying fitting insertion portions 12a and 12b. In addition, the support hole 14 is a fitting insertion portion.
The width is formed to be larger than the width orthogonal to the axial direction of 12a, 12b, and the insertion portions 12a, 12b are easily formed to be vertically rotatable. The lever 13 of the fall prevention tool 9 has the support insertion holes 12a and 12b in the support hole 1
When it completely enters into 4, it is rotated 90 ° from the horizontal direction to the vertical direction by its own weight, and at the same time, it does not come out of the insertion portions 12a and 12b through the slit 15 (see FIG. 4). The lever 13 in this example has a large tip and a large weight,
It is formed to increase the moment. In this example, the horizontal axis 11 (fitting insertion portions 12a, 12b, axial movement prevention portion 11b,
The end 11a) and the lever 13 are made of metal. The material is not limited to metal, but if at least the lever 13 is made of metal, the weight becomes large and the moment becomes large, and the inertial force kept in the vertical direction increases. The axial movement prevention portion 11b of the captive prevention tool 9 has a diameter larger than that of the support hole 14 and is interposed between the hanging tools 5a and 5b to prevent the captive prevention tool 9 from moving in the axial direction. There is. In addition, the axial movement prevention portion 11b of this example includes the horizontal axis 11
The diameter is larger than the diameter of both ends 11a. The auxiliary roller 10 is provided so as to be able to roll on the auxiliary roller traveling surface (ceiling 1 in this example) while being attached to the hangings 5a and 5b. Here, the provision of the auxiliary roller traveling surface so as to be rollable means that the auxiliary roller traveling surface is always in contact with the auxiliary roller traveling surface or is arranged with a slight gap so that the auxiliary roller traveling surface comes into contact with the auxiliary roller traveling surface when the traveling roller 3 is lifted up. It means to do. Further, since the auxiliary roller 10 is rotatably provided with respect to the horizontal shaft 11, even if the auxiliary roller 10 rotates in the attached state, the horizontal shaft 11 and the lever 13 do not rotate. In this example, as shown in FIG. 3, two pieces of the falling prevention tools 9 (equal to the number of auxiliary rollers) are provided so that they can be attached to both ends of the hanging tools 5a and 5b in the hoist traveling direction. Of course, if a plurality of auxiliary rollers 10 are provided in the hoist traveling direction as described above, the wheel removal preventing effect is improved. Further, the traveling roller 3 has its shaft 4 supported by penetrating the suspenders 5a and 5b. The traveling roller 3 includes the suspenders 5a, 5
Through the gear group 8 arranged between the b, the hoist body 6
It is provided so that the rotation is transmitted from the motor 7 fixed to. Further, in this example, the lower portion of the monorail 2 is formed in a U-shaped cross section. That is, the monorail 2 has a traveling surface portion 2a on which the traveling rollers 3 roll, a connecting portion 2b extending upward from one end of the traveling surface portion 2a and connected to the ceiling 1, and slightly rising from the other end of the traveling surface portion 2a. A rising wall (2c) that prevents the traveling roller (10) from derailing. However, the rising wall 2c is not an essential component of the present invention. The hoist disengagement prevention device configured as described above is attached to and removed from the hoist on the monol as follows. When attaching the fall-prevention tool 9, the fall-prevention tool 9
Insert the insertion portions 12a, 12b of the above into the slits 15 of the suspenders 5a, 5b with their sides lying. When the fitting portions 12a, 12b are completely inserted into the support hole 14, the lever 13 moves from the horizontal state to the vertical state by its own weight.
° It rotates naturally and maintains this vertical state. As a result, the insertion portions 12a and 12b are held vertically in the support holes 14 and do not come out of the slits 15. Since the width of the slit 15 is formed to be slightly larger than the thickness of the fitting insertion portions 12a, 12b, the lying fitting insertion portions 12a, 12b can easily enter the slit 15. Further, since the diameter of the support hole 14 is formed to be larger than the width of the fitting insertion portions 12a and 12b orthogonal to the axial direction, the fitting insertion portion 12a12b easily rotates in the support hole 14 to be in the vertical posture. In addition, the axial movement prevention unit 1 interposed between the hangings 5a and 5b
Since the diameter of the end face of 1b is larger than the diameter of the support hole 14, the falling prevention tool 9 is prevented from moving in the axial direction. Since the auxiliary roller 10 is rotatably provided with respect to the horizontal shaft 11, even if the auxiliary roller 10 rotates in the mounted state, the horizontal shaft 11 (including the fitting insertion portions 12a and 12b) and the lever 13 rotate. Never. On the other hand, when removing the fall prevention tool 9, hold the lever 13 and rotate it from the vertical direction to the horizontal direction, and then
12a and 12b are laid out and pulled out from the slit 15. In this way, the auxiliary roller 10 can be attached and detached with one touch without requiring a tightening step or the like. In particular, it is suitable for an environment such as a nuclear reactor facility where a manipulator or the like must be remotely attached and detached. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be implemented. For example, the number of fitting portions formed in one dropout prevention tool is not limited to two, and may be one or more. The number of plates of the hanging device is not limited to two as long as it is the same as the number of fitting insertion parts. Further, as the auxiliary roller traveling surface, the ceiling portion is used in the above-mentioned embodiment, but the present invention is not limited to this, and the flange portion provided on the monorail or the flange portion provided on the support structure connecting the ceiling portion and the monorail. May be used. Further, in the above-described embodiment, the lever 13 is extended so as to be completely aligned with the extension plane direction of the fitting insertion portions 12a and 12b.
However, the present invention is not limited to this, as long as it extends in the same plane direction as the fitting and inserting portions 12a and 12b. Further, in the above-described embodiment, the suspenders 5a and 5b for suspending the hoist body 6 are illustrated as the connecting members for providing the installation portion, but the connecting members are not limited to this, and the traveling roller 3 and the hoist body 6 are not limited thereto. Any structure that connects them will do. Further, in the above-described embodiment, the installation portion is formed in a plate shape as a whole, but at least the portion to which the fall prevention tool 9 is attached may be formed in a plate shape. Further, in the above-described embodiment, the installation portion is integrated with the hanging members 5a, 5b (the upper end portions of the hanging members 5a, 5b are used as the installation portions), but the installation portion is separate from the connecting member, and the upper portion of the connecting member. It may be fixed to.

[Effect of device]

In the hoist fall-out prevention device of the present invention described above, when the auxiliary roller is attached, the plate-like fitting insertion portion of the fall-out prevention tool is laid sideways into the slit having a width larger than that of the fitting insertion portion. When the lever completely enters the support hole, the lever rotates in the vertical direction by its own weight, and the fitting insertion portion is held in the support hole in a state of being vertically rotated so that the lever does not come out of the slit. On the other hand, when removing the auxiliary roller from the hoist on the monorail, the lever is rotated upward so that the fitting portion is laid sideways and pulled out through the slit. Accordingly, the auxiliary roller can be easily attached / detached to / from the hoist with one touch without using a work tool such as pliers and a tightening force. In addition, it can be securely attached without coming off during use. Further, the structure is simple and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a front view of a hoist having an embodiment of a hoist dropout prevention device according to the present invention.

FIG. 2 is a perspective view of a fall prevention tool that constitutes the fall prevention device of FIG.

FIG. 3 is a partial side view of the fall prevention device of FIG. 1 viewed from the direction A.

FIG. 4 is an operation state diagram for explaining an attaching operation of the falling prevention tool.

FIG. 5 is a front view of a hoist equipped with a conventional fall prevention device.

[Explanation of symbols]

 1 …… Ceiling (rail mounting part) 2 …… Monorail 2a …… Running surface part 3 …… Running rollers 5a, 5b …… Lifting equipment (connecting member / installation part) 6 …… Hoist body 9 …… Drop prevention tool 10 …… Auxiliary roller 11 …… Horizontal axis 11b …… Axial movement prevention part 12a, 12b …… Fit insertion part 13 …… Lever

Claims (1)

[Scope of utility model registration request] 1. A monorail which extends downward from a rail mounting portion and whose lower end portion is laterally bent to form a traveling surface portion,
A traveling roller rotatably arranged on the traveling surface of the monorail, a hoist body connected to the traveling roller by a connecting member, and a traveling roller that is movable integrally with the hoist body. A hoist including an auxiliary roller that is rollably provided on the auxiliary roller running surface above the horizontal axis, the auxiliary roller that is rotatably provided at one end of the horizontal axis, and the horizontal axis. A fall prevention tool comprising one or more plate-shaped fitting and inserting portions provided in an intermediate portion, and a lever formed at the other end of the horizontal axis so as to extend in a direction substantially flush with the fitting and inserting portion. , A plate portion extending in the hoist traveling direction and installed in parallel by the number of the fitting insertion portions, a support hole provided in the plate portion for supporting the fitting insertion portion, and an end surface of the plate portion from the support hole to the support hole. Which has a width larger than the thickness of the fitting portion. And the door,
The hoist fallout prevention device is characterized in that it is provided with an installation part consisting of.