JP6635303B2 - Chain pin removal device - Google Patents

Description

  The present invention relates to a chain pin attaching / detaching device. More particularly, the present invention relates to a pin attaching / detaching device for attaching / detaching a pin when exchanging a chain on a chain conveyor.

  In various facilities, objects are transported by a conveyor device, and a chain conveyor is also generally used. For example, in a chain conveyor in which a pallet or the like is provided between a pair of chains, an object can be conveyed by placing the object to be conveyed on the pallet or the like and moving the pair of chains.

  In such a chain conveyor, the entire chain or a part of the chain is replaced due to damage or aging of the chain. When replacing the entire chain, the link pins are removed, the old chain is removed, and the ends of the new chain are connected by link pins, and the chain is attached. When replacing a damaged link, remove the link pin connecting the damaged part and the other part, remove the damaged part, and connect the new part and the original chain with the link pin. . That is, the work of attaching and detaching the link pin is performed regardless of whether the entire chain is replaced or a part of the chain is replaced.

  By the way, in the chain of the chain conveyor, the link pins are firmly fixed so that the link pins do not come off during driving. Therefore, when removing the link pin, a large force must be applied to the link pin.

  As a device for removing a link pin of a chain, there is a technique disclosed in Patent Document 1. Patent Literature 1 discloses a tool including a main body having teeth that mesh with a chain ring, and a screw element provided with a manually operable punch attached to the main body. In this tool, it is described that a link pin can be detached by engaging a chain ring with a tooth and moving a punch by a screw element.

  However, in the tool disclosed in Patent Literature 1, the chain is fixed to the main body while the tool is held by hand, and the link pin is attached and detached. For this reason, although it can be applied to a small chain such as a roller chain for a bicycle, it is difficult to use a medium or large chain like a chain such as a chain conveyor.

  When removing a link pin of a medium or large chain, a pin detaching device as shown in FIG. 3 is currently used.

  As shown in FIG. 3, the conventional pin attaching / detaching device 100 includes a hydraulic jack 101 having a punch P for pressing a link pin LP, and a jack cradle 102 for holding the hydraulic jack 101. In the pin attaching / detaching device 100, the attachment / detachment of the link pin LP is performed by the following method.

  When attaching and detaching the link pins LP, the jack pedestal 102 is installed on the rail R on which the chain C of the chain conveyor is installed. Thereafter, in the chain C, the position of the link pin LP to be detached and the position of the punch P of the hydraulic jack 101 are matched. In this state, the hydraulic jack 101 is operated, and the link pin LP is pressed by the punch P. Then, since a large pressing force can be applied to the link pin LP from the hydraulic jack 101, the link pin LP can be removed from the bush.

  Conversely, if the link pin LP is arranged at the position of the bush and the link pin LP is pushed in by the hydraulic jack 101, the link pin LP can be inserted into the bush of the link L.

JP 2003-175474 A

  However, in the conventional pin attaching / detaching apparatus 100, the jack cradle 102 is installed on the rail R, so that the chain C needs to be lifted in order to install the jack cradle 102. Since a medium-sized or large-sized chain is heavy and the hydraulic jack 101 and the jack cradle 102 are also heavy, there is a problem that even installing the jack cradle 102 requires a large number of workers.

  In addition, only for the preparation work for removing the link pin LP, 1) lift the chain C at the portion where the link pin LP is to be removed, 2) install the jack pedestal 102 on the rail R, 3) punch P and the link pin LP. The work of aligning the center becomes necessary. That is, since a large number of operations are required only for the preparation operation, there is a problem that the number of operations for attaching and detaching the link pins LP increases.

  The present invention has been made in view of the above circumstances, and has as its object to provide a chain pin attaching / detaching device capable of easily and quickly attaching / detaching a link pin.

A chain pin attaching / detaching device according to a first aspect of the present invention is a device for attaching / detaching a link pin of a chain. And a shaft member attached to the main body portion , wherein the main body portion is disposed between the pair of frame members and a pair of frame members arranged at intervals. And a notch forming the chain receiving groove is provided in the pair of frame members, and the shaft member is screwed into the screw forming portion. The screw hole is formed such that the axial direction of the shaft member screwed into the screw hole is parallel to the width direction of the notch, and the center of the shaft member screwed into the screw hole is formed. the inner bottom surface from the axis of the notch or Partial distance of the are in the height direction of the end edge of the chain provided to be the same length as the distance to the central axis of the link pin, which faces the screw hole of the screw forming portion in the notch Is provided with a discharge space for discharging the link pin .

According to the first aspect, if the chain is arranged in the chain receiving groove so as to contact the inner bottom surface thereof, the height of the center axis of the link pin and the height of the center axis of the shaft member can be matched. Then, the center axis of the link pin and the center axis of the shaft member can be aligned only by sliding the main body along the chain. That is, since the center axis of the link pin and the center axis of the shaft member can be easily adjusted, the pre-operation for attaching and detaching the link pin can be simplified. Therefore, the attaching and detaching work of the link pin can be performed with a small number of workers and a small number of work steps . Moreover, since the main body can be reduced in weight, the handling of the apparatus can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explanatory drawing of the pin attaching / detaching apparatus 10 of this embodiment, (A) is a front view, (B) is a side view. (A) is a schematic explanatory view of the work of removing the link pin L by the chain pin removing device 10 of the present embodiment, and (B) is the work of attaching the link pin L by the chain pin removing device 10 of the present embodiment. FIG. It is a schematic explanatory view of a conventional pin detaching device 100 for a chain.

  The chain pin attaching / detaching apparatus of the present invention is an apparatus for attaching / detaching a link pin of a chain, and is characterized by improved handling and workability.

  The chain for attaching and detaching link pins by the chain pin attaching and detaching device of the present invention is not particularly limited, and can be used for attaching and detaching link pins in various chains. However, it is suitable as a device for attaching and detaching link pins of a medium-sized or large-sized chain, such as a chain of a chain conveyor used for conveying objects. Particularly, the present invention is suitable for an apparatus for attaching and detaching a link pin of a chain arranged on a rail in a chain conveyor.

(Explanation of the Chain Pin Removal Device 10 of the Present Embodiment)
As shown in FIG. 1, the pin detaching device 10 for a chain according to the present embodiment (hereinafter, referred to as the pin detaching device 10) includes a main body 11 and a shaft member 15.

(Main body 11)
As shown in FIG. 1, the main body 11 includes a pair of frame members 12, 12 and a screw forming portion 13 provided between the pair of frame members 12, 12.

  As shown in FIG. 1, the pair of frame members 12, 12 are connected so as to maintain a certain interval and a predetermined interval. The method of maintaining the pair of frame members 12, 12 at an interval is not particularly limited. For example, if the pair of frame members 12, 12 are connected by bolts or the like in a state where the spacer is arranged between them, the two can be connected while maintaining a predetermined interval.

  The pair of frame members 12, 12 are plate-shaped members, and are formed in substantially the same shape, and each has a notch 12h on one side (the lower side in FIG. 1). The notch 12h has an inner bottom surface 12a formed as a flat surface, and has a size large enough to accommodate a chain C (hereinafter simply referred to as a chain C) to which a link pin LP is attached and detached. . Specifically, the notch 12h is formed so that its width is larger than the width of the chain C and its depth Dp is about the height CH of the chain C. In the notch 12h, a side surface 12b located on a side opposite to a screw forming portion 13 described later is formed so as to be substantially orthogonal to the inner bottom surface 12a.

  A screw forming portion 13 is provided between the pair of frame members 12 described above. The screw forming portion 13 is formed with a female screw hole 13h penetrating in the width direction (the horizontal direction in FIG. 1). Specifically, the female screw hole 13h of the screw forming portion 13 is provided so that its axial direction is substantially parallel to the inner bottom surface 12a of the notch 12h. Moreover, the female screw hole 13h of the screw forming portion 13 has a distance 13L from the plane SF including the inner bottom surface 12a of the notch 12h to the center axis thereof, the same length as the distance CL from the edge of the chain C to the link pin LP. It is provided so that it becomes.

(Shaft member 15)
A shaft member 15 is attached to the female screw hole 13h of the screw forming portion 13 of the main body 11.
Specifically, the shaft member 15 has a male screw formed on a side surface thereof, and is screwed into the female screw hole 13h of the screw forming portion 13. That is, the shaft member 15 is disposed such that the distance from the center axis thereof to the plane SF including the inner bottom surface 12a of the notch 12h is the same as the distance CL from the edge of the chain C to the link pin LP. ing.
Moreover, since the shaft member 15 is screwed into the female screw hole 13h of the screw forming portion 13, the shaft member 15 can be advanced and retracted by rotating the shaft member 15. That is, the shaft member 15 can move along the width direction of the notch 12h while maintaining its central axis parallel to the inner bottom surface 12a of the notch 12h.

(Link pin LP attachment / detachment work by the pin attachment / detachment device 10 of the present embodiment)
With the above structure, the link pin LP of the chain C can be attached and detached by the pin attaching and detaching device 10 by operating as follows. In the following description, a case will be described in which the link C is used for attaching and detaching a link pin in a chain C arranged on the rail R.

  First, the pin removing device 10 is installed on the chain C arranged on the rail R from above. Specifically, the chain C is arranged in the notch 12h of the main body 11 of the pin attaching / detaching device 10. At this time, the inner bottom surface 12a of the notch 12h is arranged so as to contact the upper end surface of the chain C. With this arrangement, the center axis of the shaft member 15 is arranged to be at the same height as the link pin LP of the chain C.

  In this state, the pin attaching / detaching device 10 is moved along the chain C so that the center axis of the shaft member 15 is aligned with the position of the link pin LP to be detached. That is, the pin attaching / detaching device 10 is arranged so that the central axis of the shaft member 15 and the central axis of the link pin LP are coaxial. At this time, it is desirable to dispose the pin removing device 10 so that the surface of the chain C also makes surface contact with the side surface 12b of the notch 12h. Then, the pin attaching / detaching device 10 can be firmly positioned with respect to the chain C.

  In this state, if the shaft member 15 is protruded from the female screw hole 13h of the screw forming portion 13, the link pin LP can be pressed by the tip of the shaft member 15. If the surface of the chain C is arranged so as to be in surface contact with the side surface 12b of the notch 12h, the force for pressing the link pin LP is concentrated on the link pin LP. Then, the link pin LP is pressed by the shaft member 15 and moves with respect to the chain C (see FIG. 2A).

  Eventually, the link pin LP is pushed out by the shaft member 15 and discharged to the space between the pair of frame members 12. Then, the operation of removing the link pin LP from the chain C is completed. The space between the pair of frame members 12 from which the link pins LP are discharged corresponds to a discharge space described in the claims.

  On the other hand, when attaching the link pin LP, the link pin LP is arranged on the bush in a state where the center axis of the bush and the center axis of the shaft member 15 are aligned, and the shaft member 15 is connected to the female screw of the screw forming portion 13. It protrudes from the hole 13h. Then, the link pin LP is pushed in while its center axis is aligned with the center axis of the bush (see FIG. 2B), and the operation of attaching the link pin LP to the chain C is completed.

  As described above, the pin removing device 10 can be easily installed on the chain C, and the center axis of the link pin LP and the center axis of the shaft member 5 can be easily adjusted. Before work can be simplified. Further, since the pin detaching device 10 is merely disposed so that the inner bottom surface 12a of the notch 12h is in contact with the upper end surface of the chain C, the chain C is lifted to install the pin detaching device 10. No need. Moreover, since the pin removing device 10 does not have a heavy device such as a jack, it has a lightweight and compact configuration.

  Therefore, according to the pin attaching / detaching apparatus 10 of the present embodiment, the attaching / detaching operation of the link pin LP can be easily and quickly performed with a small number of workers and a small number of working steps.

(About 12h notch)
The depth Dp of the notch 12h may be such that the center axis of the shaft member 15 and the link pin LP (or the center axis of the bush) are coaxial when the chain C is disposed in the notch 12h. It is not particularly limited. However, if the depth Dp of the notch 12h is set to about the height CH of the chain C, when the chain C is arranged in the notch 12h, the pin attaching / detaching device 10 can be arranged in a stable state.

(Screw forming part 13)
The screw forming portion 13 may have any shape as long as the screw hole 13h is formed, and the shape and the like are not particularly limited. For example, a screw member may be formed by forming a screw hole in a block material or a shaft material. In particular, if a commercially available nut is used, there is no need to machine the screw hole, so that the pin detaching device 10 can be manufactured inexpensively and easily.

(Shaft member 15)
The shaft member 15 may be any member as long as it can be screwed into the screw hole 13h of the screw forming portion 13. For example, if a commercially available bolt is used, the pin attaching / detaching device 10 can be manufactured cheaply and easily.

(About the main unit)
The main body is not limited to the one formed by combining the pair of frame members 12 and the screw forming portion 13 as described above. For example, a groove (chain accommodation groove) is formed on one surface of the block body, and a female screw hole is formed along the width direction of the groove to communicate the groove with the outer surface of the block body. In the groove, a discharge space where the link pin is discharged by a through hole, a notch, or the like is provided in a portion facing the female screw hole, and the groove may be used as a main body. Also in such a main body, the width and depth of the groove are set to the same length as the above-described notch 12h, and the relative positional relationship between the inner bottom surface of the groove and the female screw hole is determined by the above-mentioned screw forming portion 13 and the notch 12h. A state equivalent to the relative positional relationship of the inner bottom surface 12a is set. Then, it is possible to obtain a main body that can obtain the same operation and effect as the main body 11 including the pair of frame members 12 and 12 and the screw forming portion 13 described above.

  However, if the main body is configured as described above, the weight of the main body can be reduced, so that the handling of the device can be improved and the work of attaching and detaching the link pin LP can be performed efficiently.

  The pin desorption device for a chain according to the present invention can be used for linking a chain conveyor used for conveying heavy objects such as ore and gravel, and a chain conveyor chain used for equipment that transports a large amount of powdered materials. It is suitable for a device that performs pin attachment / detachment.

DESCRIPTION OF SYMBOLS 10 Pin detachment apparatus 11 Main body part 12 Frame member 12h Notch 12a Inner bottom surface of notch 13 Screw forming part 13h Female screw hole 15 Shaft member C chain L link LP link pin LB bush

Claims (1)

A device for attaching and detaching a link pin of a chain,
A main body having a chain receiving groove for arranging the chain,
A shaft member attached to the main body so as to be able to advance and retreat along the width direction of the chain accommodation groove,
Wherein the main body is
A pair of frame members arranged at intervals,
And a screw forming portion to which the shaft member is attached, which is disposed between the pair of frame members,
The pair of frame members are provided with a notch that forms the chain receiving groove,
In the screw forming part,
A screw hole into which the shaft member is screwed is formed,
The screw hole is
The axial direction of the shaft member screwed into the screw hole is parallel to the width direction of the notch,
As the distance to the inner bottom surface of the notch from the central axis of the shaft member screwed into the screw hole, made in the height direction of the end edge of the chain as long as the distance to the central axis of the link pin Is provided,
A pin detaching device for a chain, wherein a discharge space for discharging a link pin is provided in a portion of the notch facing the screw hole of the screw forming portion .

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