JPH04215577A - Draw bar fitting structure of counterweight for industrial vehicle - Google Patents

Abstract

PURPOSE:To allow casting without using a core by longitudinally matching the opening directions of an exhaust hole, a towing member insertion port, and a draw bar fitting vertical groove formed on a weight main body. CONSTITUTION:A towing member insertion port 3 opened on the back face is horizontally formed on the back (outer) side of the lower section of a weight main body 1. A draw bar fitting groove 4 opened on the front face is provided on the front (inner) side of the lower section at the middle portion in the vertical direction with a depth so as to be communicated to the insertion port 3. A draw bar release stopping stopper 8 is assembled at the depth of the insertion port 3, and a draw bar 7 is inserted into the vertical groove 4 from an exhaust hole 2 provided at the upper section of the weight main body and fitted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawbar mounting structure for an industrial vehicle such as a forklift, which is mounted on a counterweight at the rear of the vehicle body for towing or being towed.

0002

2. Description of the Related Art FIGS. 5 and 6 show a conventional general counterweight and drawbar mounting structure. As shown in the figure, the upper part of the weight body 31 is provided with a scavenging hole 32 for discharging hot air in the engine room to the rear of the vehicle, and the lower part of the weight body 31 is provided with a drawbar insertion hole with an open rear surface. a rectangular outlet 33 for
A rectangular insertion opening 34 and two upper and lower insertion openings are provided for insertion of a traction member such as a wire rope. and,
A mounting hole 3 that concentrically penetrates the wall between the two insertion ports 33 and 34 and the wall between the traction member insertion port 34 and the lower surface of the weight body.
5 is provided, and a flanged drawbar 36 is inserted into this attachment hole 35 from the drawbar insertion port 33 to be attached. Note that 37 in the figure is a through hole for a set bolt that fixes the lower part of the weight to the frame.

0003

By the way, as is well known in the past, counterweights are generally manufactured by casting using a sand mold. Therefore, when creating a sand mold (mold), it is necessary to always consider mold removal. However, as described above, the mounting hole 35 of the drawbar 36 is not connected to the scavenging hole 32.
Since it is perpendicular to the insertion holes 33 and 34, that is, perpendicular to the direction of mold removal, it is necessary to cast using a core. However, when using a core, it is not only necessary to manufacture the core separately, but also because it is necessary to set the core in the mold when matching the upper and lower molds. The quality was very low. Also, in the demolding process, the mounting hole 3
There are problems in that the work of taking out the core from 5 is troublesome and requires a lot of man-hours for deburring.Furthermore, the counterweight itself as a product has two insertion ports, upper and lower, in addition to the scavenging hole 32. Since 33 and 34 are open, the external appearance is poor.

In view of the above-mentioned problems, the present invention provides a drawbar attachment for a counterweight for an industrial vehicle, which is improved so that it can be cast without using a core and has a clean appearance. Its purpose is to provide structure.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the present invention is constructed as follows. That is, the upper side of the weight body is provided with a scavenging hole that penetrates horizontally in the front-rear direction, and the lower side of the weight body is provided with an insertion hole for inserting a traction member that is recessed horizontally forward with the rear surface open. and,
A vertical groove for attaching a drawbar is provided with the front surface open and recessed rearward, and the vertical groove has a depth and height such that it communicates with the insertion port at an intermediate portion in the vertical direction and communicates with the scavenging hole at an upper portion. A stopper is installed on the back side of the insertion port to close the vertical groove and prevent the drawbar from slipping out, while a flange-equipped drawbar is inserted into the vertical groove and the flange is set at the upper end of the vertical groove. It is configured to be locked to the peripheral edge.

[0007]

[Operation] According to the drawbar mounting structure of the present invention configured as described above, the opening direction of each of the scavenging holes formed in the weight body, the insertion port for the traction member, and the vertical groove for mounting the drawbar is the front-rear direction. Therefore, when manufacturing the counterweight by casting, it is possible to make them correspond to the cutting direction of the model (wooden pattern) during mold manufacturing. In this way, the core can be abolished.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to FIGS. 1 to 4. In the figure, reference numeral 1 indicates a weight body of a counterweight installed at the rear of an industrial vehicle (not shown) such as a forklift. As is well known, the weight body 1 is formed to have a substantially inverted L-shape in side cross-sectional view, and although not shown, generally the horizontal portion thereof is placed on the upper surface of the vehicle body frame and locked. On the other hand, it is fixed to the rear of the vehicle body by tightening the set bolt 9 with the lower front surface of the vertical portion abutting against the rear surface of the vehicle body frame.

The weight body 1 is provided with an air scavenging hole 2 that penetrates in the front-rear direction along the horizontal part in the upper center part thereof, and has an open rear surface in the lower center part of the rear side (outer surface side) of the vertical part. Equipped with an insertion port 3 for inserting a traction member such as a wire rope or tow bar, which recesses forward, and a drawbar mount that opens the front and recesses rearward at the lower center of the front (inner side) of the vertical part. It is equipped with a vertical groove 4 for use.

The insertion port 3, which is open at the rear, is specifically formed in a rectangular shape, and extends slightly forward from the middle of the vertical portion of the weight body 1, as shown in FIG. It is set to have a depth of . On the other hand, the vertical groove 4 is narrower and longer than the insertion port 3, and is formed so that its planar cross section is approximately U-shaped, and has a depth that extends slightly to the rear of the middle of the vertical portion. It is set as follows. As a result, the vertical groove 4 has its back side facing the insertion opening 3.
It communicates with the back side at approximately the midpoint in the vertical direction.

[0011] Furthermore, a substantially rectangular depression 5 is formed on the upper end side of the vertical groove 4, opening the front side and the top side.
The upper end of the vertical groove 4 is communicated with the scavenging hole 2 via the depression 5. Further, on the lower side of the vertical part of the weight body 1, there is a set bolt for a set bolt whose axis is in the front-rear direction, one end of which opens toward the back of the insertion port 3, and the other end of which opens toward the front of the weight body 1. In this embodiment, one through hole 6 is formed, and this through hole 6 is horizontally parallel to the vertical groove 4.

The drawbar 7, which has a locking collar 7a on its head, is inserted into the vertical groove 4 from the rear opening of the scavenging hole 2 through the recess 5, as shown by the arrow in FIG. ing. The drawbar 7 inserted in this manner has its flange 7a locked onto the lower surface of the recess 5 which is the upper edge of the vertical groove 4. Further, a stopper 8 for preventing the drawbar from coming off is housed on the back side of the insertion port 3 so as to close the vertical groove 4. This stopper 8 has folded pieces 8a on the top and bottom, and a mounting piece 8b on one edge.
The weight body 1 is configured to be fixed using the set bolt 9 for fixing the weight body 1 to the vehicle body frame. Incidentally, the stopper 8 is assembled before the drawbar 7 is inserted into the vertical groove 4.

As mentioned above, the drawbar mounting structure of this embodiment basically replaces the conventional drawbar mounting hole with
A vertical groove 4 with an open front side is provided in the weight body 1, and a drawbar 7 inserted into the vertical groove 4 is prevented from coming off by a stopper 8 assembled on the back side of the insertion opening 3. Therefore, the scavenging hole 2, insertion port 3, vertical groove 4, depression 5, and through hole 6 formed in the weight body 1 are set parallel to each other in the front-rear direction. As a result, when the counterweight is cast using a sand mold, the direction of removal of the mold after sand molding can be made to match the opening direction of the scavenging hole 2, the insertion port 3, the vertical groove 4, the depression 5, and the mounting hole 6. . From this, it becomes possible to form them into an upper mold or a lower mold, and it becomes possible to eliminate the core that was conventionally required.

In this embodiment, the stopper 8 is fixed using a set bolt 9 for attaching the weight, but the stopper 8 may be assembled using a bolt other than the set bolt 9. Furthermore, the lower end of the vertical groove 4 may have a closed structure, and furthermore, the upper end may have a structure in which it communicates directly with the scavenging hole 2 without passing through the depression 5.

[0015]

[Effects of the Invention] As detailed above, according to the present invention,
When manufacturing a counterweight by casting,
It is now possible to eliminate the core that was previously necessary and manufacture it in a simple form with an upper mold and a lower mold.This eliminates the core manufacturing process and facilitates mold matching, making production easier. can improve sexual performance. In addition, eliminating the core makes it easier to remove sand during demolding, and significantly reduces the need for deburring after casting. In addition, the counterweight as a product only has the minimum necessary openings for the scavenging hole and the insertion port for the traction member on the rear surface,
The conventional drawbar insertion port has been abolished, resulting in a cleaner appearance and greater freedom in design to improve appearance.

[Brief explanation of the drawing]

FIG. 1 is a front view of a counterweight drawbar mounting structure according to an embodiment of the present invention, viewed from the rear.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view taken along line BB in FIG. 2;

[Figure 4] Figure 2 with drawbars and stoppers omitted
FIG.

FIG. 5 is a rear front view showing a conventional counterweight drawbar mounting structure.

FIG. 6 is a sectional view taken along line CC in FIG. 5;

[Explanation of symbols]

1 Weight body 2　Scavenging hole 3. Socket for inserting the traction member 4 Vertical groove for drawbar installation 7 Drawbar 8 Stopper

Claims (1)

[Claims] Claim 1: The upper side of the weight body is provided with a scavenging hole that penetrates horizontally in the front-rear direction, and the lower side of the weight body is provided with a scavenging hole for inserting a traction member that is recessed horizontally forward with the rear surface open. An insertion port and a vertical groove for attaching a drawbar recessed rearward with an open front surface are provided, and the vertical groove communicates with the insertion port at an intermediate portion in the vertical direction, and communicates with the scavenging hole at an upper portion. The depth and height are set so that
Further, a stopper is attached to the back side of the insertion port to close the vertical groove and prevent the drawbar from coming out, and a flanged drawbar is inserted into the vertical groove and its flanges are locked to the upper edge of the vertical groove. Drawbar mounting structure for counterweights for industrial vehicles.