JP2000044190A - Forklift rotating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forklift rotating device, in which the field of view of an operator is extended and visibility is improved. SOLUTION: In this rotating device, right and left front end edges 12A, 12B of a visual confirming window 2 of a base plate 3, and right and left front end edges 13A, 13B of a visually confirming window 13 of a face plate 7 are provided outside field of view borderlines 17A, 17B for linking a visual point G of a driver to both right and left inner front end edges 2A, 2B of a roller support 2. Moreover, a cutout having the specified length is provided on the front end of the roller support 2 over a vertical range in which the roller support 2 can be observed from the front side of the forklift through the visual confirming windows 12, 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for rotating an attachment such as a fork of a forklift, and more particularly, to a rotating device in which a base plate, a face plate, a dust cover, and a rubber seal are improved so that a forward view of an operator is widened. About.

[0002]

2. Description of the Related Art Conventionally, a forklift provided with a rotating device for rotating a fork has been known, for example, as disclosed in Japanese Utility Model Registration No. 2546111. This forklift is used, for example, for mounting a box pallet containing a conveyed object such as a powder or a liquid on a fork and rotating the fork to put the conveyed object inside the box pallet into a hopper. Alternatively, various attachments may be attached instead of the fork. FIG. 8 is a configuration diagram of an attachment rotating device disclosed as a prior art in the same publication, and FIG. 9 is a detailed cross-sectional view near the dust cover. Hereinafter, the prior art will be described based on these drawings.

This attachment rotating device includes a base plate 3 mounted on a lift bracket (not shown) of a forklift, and an outer race 4 is fixed to the base plate 3 by bolting. Inside the outer race 4, an inner race 6 having inner teeth 6 </ b> A on its inner periphery is rotatably mounted via a ball bearing 5. External teeth (not shown) of a pinion 10 that is rotated by a motor (not shown) mesh with the internal teeth 6A of the inner race 6, and the rotation of the pinion 10 causes the inner race 6 to move inside the outer race 4. It is designed to rotate. A face plate 7 is fixed to the front surface of the inner race 6 by bolting, and an attachment (not shown) such as a fork or a clamp is attached to the face plate 7.

[0004] At substantially the center of the base plate 3 and the face plate 7, windows 12 and 13 for viewing are provided for improving the front view from the driver's seat. A cylindrical dust cover 14 is coaxially disposed inside the inner race 6 in order to prevent dust and rainwater from entering through the windows 12 and 13 for viewing. A cylindrical rubber seal 15 that is in close contact with the face plate 7 is attached to the tip of the dust cover 14 by being inserted, whereby the inner space of the inner race 6 is sealed.

[0005]

However, the prior art disclosed in Japanese Utility Model Registration No. 2546111 has the following problems.

That is, in the prior art, the rubber seal 15 is bent and inserted into the dust cover 14, and the bent outer portion 15 A is brought into close contact with the face plate 7. Therefore, as the face plate 7 rotates, the bent outer portion 15 </ b> A gradually wears, and a gap is generated between the face plate 7 and the rubber seal 15. Then, there is a problem that dust and rainwater enter through the gap, and rust the inner race 6 and the pinion 10.

In the rubber seal 15 disclosed as an embodiment in the publication, the rubber seal 15 is formed into a flat plate shape, and the flat plate portion is brought into close contact with the face plate 7 on the inner peripheral side of the dust cover 14. For this reason, the area where the face plate 7 contacts the rubber seal 15 is large, and the face plate 7 is in contact with the rubber seal 15 on the inner peripheral side of the dust cover 14. Cannot be extended to As a result, the field of view when the operator looks forward from the pickling window 13 is obstructed by the face plate 7, and the field of view of the operator is narrowed. That is, the visibility of the operator is poor, and it is difficult to monitor the front end of the forklift, the attachment mounted on the fork, and the like.

Further, in the prior art, as shown in the embodiment, the size of the window 13 for viewing the face plate 7 is substantially the same as the size of the window 12 for viewing the base plate 3. Therefore, when the operator shifts the viewpoint and looks forward, the face plate 7
As a result, the view is blocked, and it is difficult to secure a sufficient view.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has an enlarged front view window of a base plate and a face plate to widen a field of view of an operator.
It is an object of the present invention to provide a forklift rotating device with improved visibility.

[0010]

Means for Solving the Problems, Action and Effect In order to achieve the above object, the invention of the first configuration is fixed to a front portion of a roller support which is vertically movable with respect to a mast of a forklift, A base plate having a viewing window for viewing forward, an outer race fixed to the base plate, and rotatably supported inside the outer race,
An inner race having inner teeth meshing with outer teeth of a pinion connected to a driving motor on an inner periphery; a face plate fixed to the inner race and having a viewing window for forward viewing; and a front face of the face plate. A forklift equipped with a fork attached via a finger board fixed to the part, the left and right foremost edges of the viewing window of the base plate, and the left and right foremost edges of the viewing window of the face plate. , Are provided outside the visibility boundary line that connects the driver's viewpoint and the front end edges on the left and right inner sides of the roller support, respectively.

According to the invention described in the first configuration, when the operator looks at the foremost edges on both left and right inner sides of the roller support, the field of view is not obstructed by the base plate and the face plate. As described above, since the width of the viewing window of the base plate and the face plate in the left-right direction is widened, the visibility of the operator in the left-right direction is improved, and the operability of the forklift is improved.

According to a second aspect of the present invention, in the forklift rotating device according to the first aspect, a predetermined front and rear portion of the front end of the roller support extends over a vertical range in which the roller support can be observed from the front of the forklift through a viewing window. A notch of a length in the direction is provided.

According to the second aspect of the invention, the notch is provided at the front end of the roller support. As a result, a part of the roller support that has blocked the forward view of the operator is removed, the visibility in the left-right direction is further improved, and the operability of the forklift is improved.

According to a third aspect of the present invention, in the forklift rotating device according to the first or second aspect, the left-right direction is substantially the same as the left-right width of the face plate viewing window at the lower end of the upper plate of the finger board. A notch having a predetermined length in the vertical direction is provided over the range.

According to the invention described in the third configuration, a notch having a predetermined vertical length is provided at the lower end of the upper plate of the finger board. As a result, a part of the upper plate that has blocked the forward view of the operator is removed, the visibility in the vertical direction is further improved, and the operability of the forklift is improved.

Further, the invention described in the fourth configuration is characterized in that the first to third aspects
In the rotating device of a forklift according to any one of the configurations, a base plate or a face plate is provided so as to protrude to the other, and a rubber seal at a tip portion is brought into contact with the other, so that the vicinity of the inner teeth of the inner race is formed. A dust cover for sealing is provided.

According to the invention described in the fourth aspect, since the vicinity of the inner teeth of the inner race is sealed by the dust cover having the rubber seal at the tip, the viewing window of the face plate is extended to the vicinity of the inner race. Becomes possible.
Thereby, the forward visibility of the operator is further improved, and the operability of the forklift is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In each of the embodiments, the same reference numerals are given to the same elements as the drawings used in the description of the related art and the drawings used in the description of the embodiments earlier than the embodiment. Omitted.

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a plan view of a rotating device of a forklift according to the present embodiment, FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof as viewed from the front. In these figures, the rotating device of the forklift is fixed to the front of a pair of left and right roller supports 2, 2 which are movably supported by a pair of left and right masts 1, 1 (corresponding to a conventional lift bracket). A base plate 3 serving as a base of the rotating device; an outer race 4 fixed to a front portion of the base plate 3; an inner race 6 rotatably supported on the inner peripheral side of the outer race 4 via a ball bearing 5; A face plate 7 fixed to the front of the race 6, and a pair of upper and lower parallel plates 8A and 8B fixed to the front of the face plate 7;
And two forks 9, 9 slidably mounted on the finger board 8 and positioned by positioning means 20 such as bolts or pins.

The inner race 6 has internal teeth 6 on its inner periphery.
A, inside which a pinion 10 connected to a motor 11 is arranged. When the inner teeth 6A of the inner race 6 mesh with the outer teeth 10A of the pinion 10, and the pinion 10 is rotated by the motor, the inner race 6 rotates. Thereby, the face plate 7 fixed to the inner race 6 rotates, and the finger board 8 fixed to the face plate 7 is rotated.
The fork 9 is rotated via.

At this time, as shown in FIGS.
At the center of each of the base plate 3 and the face plate 7, semi-lunar viewing windows 12 and 13 for improving the visual field of the operator are provided. The operator monitors a work such as a box pallet mounted on the fork 9 in front of the forklift or through the windows 12 and 13 for visual recognition.

The rotating device includes a viewing window 12,
In order to prevent dust and rainwater from entering the inner race 6 from the inside 13, a cylindrical dust cover 14 is provided. FIG. 4 shows a detailed cross-sectional view of the vicinity of the dust cover 14. As shown in FIGS. 3 and 4, the dust cover 14
It is fixed to the front surface of the base plate 3 along the inner periphery of the inner race 6 by fixing means (not shown) such as bolts. In the vicinity of the pinion 10,
The dust cover 14 is arranged so as to surround the outer periphery of the pinion 10. A rubber seal 15 having a lip 15B is inserted into the tip of the dust cover 14. The lip 15B and the face plate 7 are brought into close contact with each other to seal the inner space of the inner race 6, thereby preventing dust and rainwater. To prevent intrusion.

At this time, as shown in FIG. 1, the base plate 3 and the roller support 2 are welded to each other at a welding portion W1 outside the roller support 2 outside the roller support 2, and inside the base plate 3 inside the roller support 2. Each is fixed by welding or the like at a welding location W2. As a result, the left and right foremost edges 12A and 12B of the viewing window 12 of the base plate 3 are the view boundary lines 17A and 17B connecting the operator's viewpoint G and the left and right innermost foremost edges 2A and 2B of the roller support 2, respectively. Outside. That is, from the operator's viewpoint G to the forefront edge 2
A, 2B, the frontmost edge 1 of the viewing window 12
2A and 12B are out of view. As a result, the base plate 3 does not obstruct the field of view of the operator, and the field of view of the operator extends to the inside of the roller support 2 in the left-right direction.

As shown in FIGS. 2 and 3, the lower end of the upper plate 8A fixed to the front of the face plate 7 has a lateral direction substantially equal to the lateral width of the viewing window 13 of the face plate 7. A notch J having a predetermined vertical length S is provided over the range of. As a result, FIG.
When the upper end of the viewing window 13 of the face plate 7 is viewed from the viewpoint G of the operator as shown in FIG.
Does not obstruct the operator's field of view, the operator's field of view expands upward, and it becomes possible to look further forward.

As shown in FIG. 4, the dust cover 14 and the rubber seal 15 according to this embodiment are installed near the inner peripheral side of the inner race 6. This allows
The viewing window 13 of the face plate 7 is the dust cover 1
4 can be extended to the vicinity of the lip 15B of the rubber seal 15 inserted. That is, as shown in FIG. 1, the forefront edges 13A, 13B of the face plate 7
Are spread further outward, so that the viewing window 13 of the face plate 7 is larger than the viewing window 12 of the base plate 3.

At this time, the forefront edges 13A, 13B of the viewing window 13 of the face plate 7 are aligned with the viewpoint G of the operator and the foremost edges 2A, 2 inside the roller support 2.
It is preferable to be outside the view boundary lines 17A and 17B connecting B and B, respectively. At this time, the foremost edges 2A and 2A inside the roller support 2 from the viewpoint G of the operator.
When B is viewed, the forefront edges 13A and 13B inside the viewing window 13 of the face plate 7 do not enter the field of view. As a result, the face plate 7 does not obstruct the field of view of the operator, and the field of view of the operator extends to the inside of the roller support 2 in the left-right direction.

Further, as shown in FIG. 1, when the operator shifts the viewpoint G and looks at the forefront edges 12A and 12B of the base plate 3 from the viewpoint G1, a very wide range can be seen without being blocked by the face plate 7. It is possible to put in. Moreover, this is true not only in the left-right direction but also in all directions in the lower half where the viewing window 13 has an arc shape.

As described above, according to the present embodiment, when the operator views the frontmost edges 2A, 2B inside the roller support 2 from the viewpoint G1, the field of view is blocked by the base plate 3 and the face plate 7. Never be. Further, when the operator views the upper end of the viewing window 13 of the face plate 7 from the viewpoint G1, the view is not obstructed by the upper plate 8A. In this way, the field of view of the operator can be further expanded in the left-right direction and the upward direction. Further, since the dust cover 14 is provided near the inner race 6, the viewing window 13 of the face plate 7 can be extended to the vicinity of the inner race 6. Since the viewing windows 12 and 13 can be widened in this way, the visibility of the operator in the forward direction is improved, and a rotating device with good visibility can be obtained.

A lip 15 is attached to the tip of the rubber seal 15.
B, and the lip 15B is brought into close contact with the face plate 7. Thus, even if the lip 15B is worn by contact with the face plate 7, the lip 15B is continuously pressed against the face plate 7 by its own elasticity. In other words, the time until a gap is formed between the rubber seal 15 and the face plate 7 becomes longer, and the life of the rubber seal 15 can be extended.

Next, a second embodiment will be described with reference to FIGS. FIG. 5 is a side view of a forklift rotating device according to the present embodiment, and FIG. 6 is a plan view thereof.

As shown in FIG. 5, on the front side of the face plate 7, a finger board 8 having a pair of upper and lower parallel upper and lower plates 8A and 8B separated by a distance D is fixed. Roller support 2 according to the present embodiment
Has a notch H having a predetermined length t in the front-rear direction at its front end.
have. The notch H is provided in the vertical direction at least over the entire range in which the roller support 2 can be observed from the front of the forklift through the viewing windows 12 and 13.

As shown in FIG. 6, when the operator looks forward from the viewpoint G of the operator, the frontmost edges 2A and 2B of the roller support 2 are more rearward than those in the first embodiment. , The operator's field of view is further expanded, and a rotating device with good visibility can be obtained.

Next, a third embodiment will be described with reference to FIG. This figure shows the field of view when the operator shifts the viewpoint G and looks forward from the viewpoint G2 through the viewing windows 12 and 13. That is, this embodiment is suitable for a case where the outer race 4 and the inner race 6 are arranged on the outer peripheral side as compared with the first and second embodiments. In this case, the forefront edges 13A and 13B of the viewing window 13 of the face plate 7 are connected to the forefront edges 2A and 2B of the roller support 2 and the forefront edges 12A and 12B of the viewing window 12 of the base plate 3, respectively. Border line 1
The rotation device is configured so as to be located above or outside 9A and 19B. Accordingly, when the forefront edges 2A and 2B are viewed from the viewpoint G2, the forefront edges 12A and 12B of the viewing window 12 do not enter the field of view, and the face plate 7 does not block the field of view.

As described above, according to the present embodiment, even when the operator shifts the viewpoint G to the viewpoint G2, the field of view is not obstructed by the face plate 7, and a wider field of view can be obtained. .

[Brief description of the drawings]

FIG. 1 is a plan view of a forklift rotating device according to a first embodiment of the present invention.

FIG. 2 is a side view of the rotating device.

FIG. 3 is a front view of the rotating device.

FIG. 4 is a detailed sectional view near the dust cover.

FIG. 5 is an explanatory view of a rotating device according to a second embodiment.

FIG. 6 is a plan view of a rotating device.

FIG. 7 is a plan view of a rotating device according to a third embodiment.

FIG. 8 is a structural view of an attachment rotating device according to the related art.

FIG. 9 is a detailed sectional view near the dust cover.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mast, 2 ... Roller support, 2A, 2B ... Front end edge, 3 ... Base plate, 4 ... Outer race, 5 ...
Ball bearing, 6… Inner race, 7… Face plate, 8
... finger board, 8A ... upper plate, 8B ... lower plate, 9 ... fork, 10 ... pinion, 11 ... motor, 1
2: Window for viewing, 12A, 12B: Edge, 13: Window for viewing, 13A, 13B: Edge, 14: Dust cover, 1
5: rubber seal, 15A: outer portion, 15B: lip, 19A, 19B: visibility boundary line, 20: positioning means.

Claims (4)

[Claims] 1. A base plate (3) fixed to a front portion of a roller support (2) movable vertically with respect to a mast (1) of a forklift, and having a viewing window (12) for viewing forward. , An outer race (4) fixed to the base plate (3), and outer teeth (10) of a pinion (10) rotatably supported inside the outer race (4) and connected to a driving motor (11) on the inner periphery. 1
0A), an inner race (6) having internal teeth (6A) meshing therewith, a face plate (7) fixed to the inner race (6), and having a viewing window (13) for forward viewing. A forklift equipped with a fork (9) mounted via a fingerboard (8) fixed to the front of the (7), the left and right sides of the viewing window (12) of the base plate (3). Front edge (12A, 12B) and face plate (7) window (1
3) The left and right front edge (13A, 13B) is
And the innermost front edge of the roller support (2) (2A,
2B), provided outside of the view boundary lines (17A, 17B) connecting the two. 2. The forklift rotating device according to claim 1, wherein the front end of the roller support (2) extends over a vertical range in which the roller support (2) can be observed from the front of the forklift through viewing windows (12, 13). A predetermined length t in the front-rear direction
A rotating device provided with a notch H. 3. The rotating device for a forklift according to claim 1, wherein the width of the fingerboard (8) is substantially equal to the lateral width of the viewing window (13) of the face plate (7) at the lower end of the upper plate (8A). A rotating device provided with a notch J having a predetermined vertical length S over the same horizontal range. 4. The rotating device for a forklift according to claim 1, wherein one of the base plate (3) or the face plate (7) is provided so as to protrude to the other, and a rubber seal (15) provided at a tip end portion. And a dust cover (14) for abutting the inner race (6A) of the inner race (6) by contacting the inner race (6) with the other.