JP4917813B2 - Chain / hose protector - Google Patents

Description

  The present invention relates to a chain / hose protection device applied to a cargo handling vehicle such as a forklift in which, for example, an attachment hose or cable (hereinafter simply referred to as a hose) is provided along with a lift chain, and particularly protects the lift chain. The present invention relates to an improvement of an integrated chain protector that protects a hose and a hose protector that protects a hose.

Conventionally, a so-called lift chain that prevents a lift chain or hose from falling off a chain wheel or pulley, or prevents other objects (including an operator's hands and fingers, and so forth) from being caught between them. For example, the following are known as chain / hose protection devices for protecting a hand and a finger of a worker and protecting a hand and a finger of an operator.
(1) A chain protector that protects a lift chain and a hose protector that protects a hose are separated (see FIG. 3 of Patent Document 1).
(2) A chain protector that protects the lift chain and a hose protector that protects the hose are integrated, and this integrated one is attached to the chain wheel shaft by a dedicated bolt (Patent Document) 2 (see FIG. 1).

Japanese Patent No. 2720708 Japanese Utility Model Publication No. 61-168097

However, in the case of (1), the chain protector and the hose protector are separated from each other, so that the number of parts increases and assembly / disassembly cannot be easily performed. Further, since the chain wheel shaft and the pulley shaft are arranged apart from each other in the left-right direction, they are bulky in the left-right direction and the forward visibility is poor.
In the case of (2), the integrated chain / hose protector was attached to the chain wheel shaft with a dedicated bolt, so the number of parts increased accordingly, and assembly / disassembly could not be performed easily. . Moreover, since the chain wheel shaft and the pulley shaft are arranged apart from each other in the vertical direction in order to provide the bolts, the bulk is vertical and the forward visibility is poor.
In short, any of the conventional ones has a large number of parts and cannot be easily assembled and disassembled, and it cannot be made compact and has a poor front view.

  The present invention was devised in view of the above-mentioned problems, and was devised in order to solve this problem. The object of the present invention is to provide a chain / hose protection device capable of improving the forward visibility.

The chain / hose protection device of the present invention basically includes a chain wheel shaft, a chain wheel that is rotatably provided on the chain wheel shaft and over which a lift chain is stretched, and is arranged in series on the chain wheel shaft. A pulley shaft that is detachably attached, a pulley that is rotatably provided on the pulley shaft and over which a hose is passed, and a chain / hose protector that is held between the chain wheel shaft and the pulley shaft to protect the lift chain and the hose. The chain hose protector includes a vertical piece positioned between the chain wheel and the pulley and held between the chain wheel shaft and the pulley shaft, and a lower horizontal extending from the lower end of the vertical piece to the lower side of the chain wheel. A piece, an upper horizontal piece extending above the pulley from the upper end of the vertical piece, and rising from the free end of the lower horizontal piece. Characterized in that it includes a that upright.

The lift chain is guided by a chain wheel that is rotatable relative to the chain wheel axis. The hose is guided by a pulley that is rotatable with respect to the pulley shaft. The lift chain and hose are protected by a chain / hose protector. In addition, the chain / hose protector can prevent the operator's hands and fingers from getting caught between the lift chain and the chain wheel.
Since the pulley shaft is arranged in series with the chain wheel shaft and is detachably attached thereto, the chain wheel and the pulley that are rotatably supported by these can be arranged close to each other in parallel. As a result, it is not bulky in the left-right direction and the up-down direction, and the whole can be configured compactly, and the front view can be improved.
Since the chain / hose protector is clamped between the chain wheel shaft and the pulley shaft by attaching and detaching the pulley shaft, a dedicated bolt or the like is not required. As a result, the number of parts can be reduced accordingly, and assembly and disassembly can be easily performed.

  The pulley shaft preferably includes a screw hole formed at one end of the chain wheel shaft and a bolt screwed into the screw hole. In this way, since the pulley shaft can be configured using commercially available bolts, the cost can be reduced accordingly.

The chain / hose protector is positioned between the chain wheel and the pulley and is held between the chain wheel shaft and the pulley shaft, a lower horizontal piece extending from the lower end of the vertical piece to the lower side of the chain wheel, and a vertical piece. Since the upper horizontal piece extending from the upper end to the upper side of the pulley and the upright piece rising from the free end of the lower horizontal piece can be produced by bending a single plate, the configuration is simple, and it is easy and inexpensive to produce. I can do it.

According to the present invention, the following excellent effects can be achieved.
(1) Consists of a chain wheel shaft, chain wheel, pulley shaft, pulley, and chain / hose protector. The pulley shaft is arranged in series with the chain wheel shaft and is detachably mounted. Since the chain / hose protector is held between the shaft and the shaft, the number of parts can be reduced, assembly and disassembly can be easily performed, and the front view can be improved with a compact configuration.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a rear view in which a part of the chain / hose protection device of the present invention is vertically cut. FIG. 2 is a perspective view showing a chain / hose protector.

  The chain / hose protection device 1 is composed of a chain wheel shaft 2, a chain wheel 3, a pulley shaft 4, a pulley 5, and a chain / hose protector 6, and is applied to a cargo handling vehicle such as a forklift.

A cargo handling vehicle such as a forklift is provided with a mast device 50 on the front side of the vehicle body.
The mast device 50 includes an outer mast 51, an inner mast 52 that can be raised and lowered along the outer mast 51, a carriage (not shown) that can be raised and lowered along the outer mast 51, and a lift cylinder 53 that raises and lowers the inner mast 52 relative to the outer mast 51. And a lift chain 54 for raising and lowering the carriage with respect to the inner mast 52.
When an attachment (not shown) is mounted on the carriage, a hose (including not only a hydraulic hose but also a cable such as an electric wire, etc.) 55 is interposed between the attachment and the vehicle body.

  The chain wheel shaft 2 forms the basic part of the chain / hose protection device 1. In this example, the chain wheel shaft 2 is horizontal in the left-right direction and is implanted inside the chain bracket 7 attached to the back surface of the inner mast 52. . Specifically, the chain wheel shaft 2 is a flanged shaft provided with a flange portion 8 in the middle, and one small diameter portion 9 is fitted in a through hole 10 formed in the chain bracket 7 so that Part 8 is welded. An upper tie beam 11 is installed between the left and right chain brackets 7.

  The chain wheel 3 is rotatably provided on the chain wheel shaft 2 and a lift chain 54 is passed over. In this example, the other small diameter portion 9 of the chain wheel shaft 2 is provided to be rotatable around a horizontal axis. The chain wheel shaft 2 is secured to the other small diameter portion 9 of the chain wheel shaft 2 by a snap ring 12 and a flange portion 8 that are detachably attached.

  The pulley shaft 4 is arranged in series with the chain wheel shaft 2 and is detachably attached. In this example, the pulley shaft 4 is horizontal in the left-right direction and is arranged concentrically and in series with the chain wheel shaft 2. , A screw hole 13 formed at one end of the chain wheel shaft 2, a bolt 14 screwed into the screw hole 13, a washer 15 inserted through the screw hole 15, and a spring washer 16.

  The pulley 5 is rotatably provided on the pulley shaft 4 and is hung around a hose 55. In this example, the pulley 5 is composed of two pieces corresponding to the hose 55, and can be rotated on the bolt 14 of the pulley shaft 4, respectively. They are juxtaposed and are prevented from coming off by washers 15 and spring washers 16.

The chain / hose protector 6 is sandwiched between the chain wheel shaft 2 and the pulley shaft 4 to protect the lift chain 54 and the hose 55. In this example, the chain / hose protector 6 is positioned between the chain wheel 3 and the pulley 5. The vertical piece 17 held between the chain wheel shaft 2 and the pulley shaft 4, the lower horizontal piece 18 extending below the chain wheel 3 from the lower end of the vertical piece 17, and the upper portion extending above the pulley 5 from the upper end of the vertical piece 17 And a horizontal piece 19.
The vertical piece 17 is provided with an elongated hole 20 through which the bolt 14 of the pulley shaft 4 is inserted, and the lower horizontal piece 18 is provided with an upright piece 21 rising vertically from the free end.
Thus, the chain / hose protector 6 is manufactured by bending and punching a single plate, and the vertical piece 17, the lower horizontal piece 18, and the upright piece 21 are connected to the chain wheel 3, the lift chain 54, and the like. The vertical piece 17 and the upper horizontal piece 19 constitute a hose protector that prevents the hose 55 from falling off the pulley 5. .

Next, the operation will be described based on such a configuration.
When the lift cylinder 53 is expanded and contracted, the inner mast 52 is raised and lowered with respect to the outer mast 51 and the carriage is raised and lowered with respect to the inner mast 52.
At this time, the lift chain 54 is guided by the chain wheel 3 that can rotate with respect to the chain wheel shaft 2. The hose 55 is guided by a pulley 5 that can rotate with respect to the pulley shaft 4.

  The lift chain 54 and the hose 55 are protected by the chain / hose protector 6. In other words, the vertical piece 15, the lower horizontal piece 16, and the upright piece 19 of the chain / hose protector 6 prevent other objects from being caught between the lift chain 54 and the chain wheel 3 and the chain / hose protector 6. The vertical piece 15 and the upper horizontal piece 17 prevent the hose 55 from falling off the pulley 5.

Since the pulley shaft 4 is arranged concentrically and in series with the chain wheel shaft 2 and is detachably attached thereto, the chain wheel 3 and the pulley 5 that are rotatably supported by them can be arranged close to each other in parallel. it can. As a result, it is not bulky in the left-right direction and the up-down direction, and the whole can be configured compactly, and the front view can be improved.
Since the chain / hose protector 6 is sandwiched between the chain wheel shaft 2 and the pulley shaft 4 by attaching and detaching the pulley shaft 4 to / from the chain wheel hose protector 6, a dedicated bolt or the like is not necessary. As a result, the number of parts can be reduced accordingly, and assembly and disassembly can be easily performed.

The pulley shaft 4 is concentrically provided with respect to the chain wheel shaft 2, but is not limited thereto, and may be slightly decentered as long as it is in series, for example.
In the previous example, the chain / hose protector 6 was provided with the lower horizontal piece 18 extending below the chain wheel 3 and the upper horizontal piece 19 extending above the pulley 5. An upper horizontal piece extending upward or a lower horizontal piece extending below the pulley 5 may be provided.
In the previous example, the hose 55 has been described as being disposed on both the left and right sides. However, the hose 55 is not limited thereto, and may be disposed only on one side, for example. In this case, if the threaded hole 11 similar to the opposite side is formed in the chain wheel shaft 2, the chain / hose protector 6 can be attached by screwing a bolt different from the bolt 14 into the threaded hole 11. it can. The chain / hose protector 6 may omit the upper horizontal piece 19.

The rear view which cut through a part which shows the chain hose protection apparatus of this invention longitudinally. The perspective view which shows a chain hose protector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chain / hose protection device, 2 ... Chain wheel shaft, 3 ... Chain wheel, 4 ... Pulley shaft, 5 ... Pulley, 6 ... Chain / hose protector, 7 ... Chain bracket, 8 ... Gutter, 9 ... Small diameter part, DESCRIPTION OF SYMBOLS 10 ... Through-hole, 11 ... Upper tie beam, 12 ... Snap ring, 13 ... Screw hole, 14 ... Bolt, 15 ... Washer, 16 ... Spring washer, 17 ... Vertical piece, 18 ... Lower horizontal piece, 19 ... Upper horizontal piece , 20 ... long hole, 21 ... upright piece, 50 ... mast device, 51 ... outer mast, 52 ... inner mast, 53 ... lift cylinder, 54 ... lift chain, 55 ... hose.

Claims (2)

A chain wheel shaft, a chain wheel that is rotatably provided on the chain wheel shaft and over which a lift chain is stretched, a pulley shaft that is arranged in series on the chain wheel shaft and is detachably mounted, and is rotatable on the pulley shaft Provided with a pulley over which a hose is passed, and a chain / hose protector that is held between the chain wheel shaft and the pulley shaft to protect the lift chain and the hose ,
The chain hose protector includes a vertical piece positioned between the chain wheel and the pulley and held between the chain wheel shaft and the pulley shaft, a lower horizontal piece extending from the lower end of the vertical piece to the lower side of the chain wheel, and a vertical piece. A chain / hose protection device comprising: an upper horizontal piece extending from the upper end of the lower upper piece to the pulley, and an upright piece rising from the free end of the lower horizontal piece .   The chain / hose protection device according to claim 1, wherein the pulley shaft includes a screw hole formed at one end of the chain wheel shaft and a bolt screwed into the screw hole.

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