JPH08282985A - Counter weight supporting device for industrial vehicle - Google Patents

Abstract

PURPOSE: To enhance correspondability from standard specification to separation specification and operability at separation by utilizing a mounting part of a weight stopper bolt in the standard specification to make a counter weight vertical part fixable, in a counter weight supporting device for an industrial vehicle. CONSTITUTION: In a supporting device for a counter weight mounted on a body rear part of an industrial vehicle, a stopper device 17 is provided in a vertical part 12 of the counter weight 10. This stopper device 17 is constituted by a bracket 19 mounted on a stopper mounting hole 15 formed in the vertical part 12, stopper pin 18 mounted slidably in the longitudinal direction in the stopper bracket 19 also to be made extractable/insertable in a stopper hole 4 formed in a rear frame 3, compression coil spring 20 of holding this stopper pin 18 in an inserting position and a stop pin 22 which can hold the stopper pin 18 in an extracting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight supporting device for industrial vehicles such as forklifts and shovel loaders, and more particularly to a supporting device suitable for attaching and detaching the counterweight.

[0002]

2. Description of the Related Art In a conventional industrial vehicle such as a forklift or shovel loader, as shown in FIG. 6, a counterweight 34 having a substantially inverted L-shaped vertical cross section is mounted on a rear end of a vehicle body frame 31. To the projections 32 formed on the upper left and right sides of the
5 is locked, while the front surface of the vertical portion is in contact with the rear surface of the rear frame 33 (usually the rear axle bracket) of the vehicle body frame 31, the weight stopper bolt 3
A standard specification is that the rear frame 33 is fastened to the rear frame 33 by means of No. 6.

By the way, in the case of an industrial vehicle, the counterweight may be separated from the vehicle body in order to reduce the crane hoisting load at the time of loading and to effectively utilize the loading space onboard the vessel. However, in the case of the supporting device of the standard specification described above, a special tool for removing and attaching the bolts is required to separate the counter weight, which is not convenient. Therefore, conventionally, for a vehicle used for inboard work or an export vehicle, a counterweight support device of a separated specification with improved usability as shown in FIG. 7 is applied.

In the counterweight support device of the separated specification shown in FIG. 7, the counterweight 3 having a substantially inverted L-shaped vertical cross section is formed on the projections 32 formed on the upper left and right sides of the rear end of the body frame 31.
4 engages with the recesses 35 formed on the left and right horizontal lower surfaces, while the vertical front surface of the counterweight 34 abuts the rear surface of the rear frame 33 of the vehicle body frame 31, and the counterweight 34 is attached by the hook device 37 attached to the rear frame 33. It is configured to regulate the rising of the.

That is, the hook device 37 includes the rear frame 33.
A bracket 38 which is welded to and extends rearward and upward, a hook member 40 whose rear end is horizontally rotatably attached to the bracket 38 via a pin 39 and extends horizontally, and a hook member 40 of the hook member 40. It is composed of a stopper 41 for restricting horizontal rotation. Then, the hook member 40 restricts the upward movement of the counterweight 34 by pressing the inner wall surface of the ventilation hole 34a for engine room ventilation formed in the vertical portion of the counterweight 34 from above by the tip portion thereof. It has become.

The stopper 41 has a bracket 3 at its upper end.
8 is rotatably attached in the front-rear direction via a pin 42, and is suspended so as to straddle the base side of the hook member 40 from above to restrict the horizontal rotation of the hook member 40. Therefore, by inserting the hand from the vent hole 34a, flipping up the stopper 41 as shown by an imaginary line in the drawing, and horizontally retracting the hook member 40 in the direction of the arrow in the drawing to retract the counterweight 34 from the vent hole 34a. Can be separated from the car body. It should be noted that as a counterweight support device of such a separate specification, the
There is a publication No. 31510.

[0007]

However, in the case of the above-described conventional counterweight support device of the separate specification, the stopper device 37 is attached to the rear frame 33 side, so that the rear portion of the vehicle body frame needs to be modified. age,
The compatibility from the standard specifications to the separation specifications is low, and the laborious work of welding the bracket 38 to the rear frame 33 is involved. Furthermore, since the stopper device 37 is located at the deep position of the ventilation hole 34a, there is a problem that it is difficult to perform an operation work by inserting a hand.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to fix a vertical portion of a counter weight by using a mounting portion of a weight stopper bolt of standard specifications. Accordingly, it is an object of the present invention to provide a counterweight support device for an industrial vehicle that has high compatibility from standard specifications to separation specifications and has high operability during separation.

[0009]

In order to solve the above problems, the present invention takes the following means. That is, according to the first aspect of the present invention, the horizontal portion of the counterweight is mounted and locked on the upper surface of the rear portion of the vehicle body, while the inner surface of the vertical portion that extends downward from the horizontal portion and covers the rear portion of the vehicle body contacts the rear surface of the rear frame of the vehicle body. In a counterweight supporting device for an industrial vehicle having a structure for contacting and supporting a counterweight, in a vertical portion of the counterweight, the counterweight is provided in a through hole in the front-rear direction, and in a stopper hole formed in the rear frame through the through hole. It is characterized in that a stopper device having a stopper pin that can be inserted and removed and a stopper pin insertion holding means that holds the stopper pin at the insertion position is provided.

According to a second aspect of the present invention, in the counterweight support device for an industrial vehicle according to the first aspect, the stopper device is provided with stopper pin pull-out holding means for holding the stopper pin at a position pulled out from the stopper hole. The holding means is a fixing member fixed to the counterweight,
It is characterized by comprising a locking member which is provided on the stopper pin and which can be engaged with and disengaged from the fixing member.

According to a third aspect of the invention, in the counterweight supporting device for an industrial vehicle according to the second aspect, the fixing member is a locking pin that can be mounted in the drawbar insertion hole of the counterweight, and the locking pin is a stopper device. Is also used as a mounting member for fixing to the counterweight.

[0012]

According to the invention of claim 1, which is configured as described above, the stopper is mounted in a state where the horizontal portion of the counterweight is mounted and locked on the rear upper surface of the vehicle body and the front surface of the vertical portion is in contact with the rear surface of the rear frame. When the pin is inserted into the stopper hole of the rear frame and is held in the inserting position by the holding means, the counterweight can be stably fixed at a predetermined mounting position, while the stopper pin is pulled out from the stopper hole to the front side. By lifting the counter weight, it can be separated from the vehicle body.

Since the stopper device according to the first aspect of the present invention has a structure in which the counter weight is fixed by inserting the stopper pin into the stopper hole of the rear frame, the stopper device is already installed in the standard rear frame. The weight stopper bolt hole of can be used. for that reason,
The standard specification can be easily changed to the separated specification, and the stopper pin can be easily inserted and removed because the stopper pin is inserted and removed.

According to the second aspect of the present invention, when the counterweight is separated from the vehicle body, the stopper pin can be held at the pulling-out position, and it is not necessary for the worker to continue to hold the stopper pin at the pulling-out position. It will be easier. Further, according to the invention of claim 3, the fixing member of the stopper pin pull-out holding means is attached to the counter weight by utilizing the existing vertical hole for inserting the drawbar, so that the counter is mounted for the attachment. The weight does not need to be specially processed.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a counterweight support device according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a partially cutaway side view of the rear part of the forklift vehicle body, FIG.
6A and 6B are enlarged cross-sectional views of the stopper device. FIG. 7A shows the counter weight fixed, and FIG. 7B shows the counter weight separated. 3 is a plan sectional view of the stopper device, and FIG. 4 is a rear view of the stopper device.

As shown in FIG. 1, the counterweight 10 mounted on the rear portion of the vehicle body includes a horizontal portion 11 and the horizontal portion 1.
1 and a vertical portion 12 that extends downward from the vehicle body 1 and covers the rear portion of the vehicle body. The horizontal portion 11 of the counterweight 10 is mounted on the rear upper surface of the vehicle body frame 1, and the projections 2 provided on the left and right of the frame upper surface.
It is locked via the recess 13. Also, the vertical portion 12
The front surface of the rear frame contacts the rear frame, more specifically, the rear surface of the rear axle bracket 3 extending in the vehicle width direction, and receives a moment around the locking portion that acts on the counterweight 10.

The counterweight 10 is provided with a ventilation hole 14 for laterally wide engine room ventilation that penetrates in the front-rear direction on the upper side of the vertical portion 12, and a through hole for mounting a stopper that penetrates in the front-rear direction on the lower side. Further, a drawbar insertion hole 16 that extends vertically through the through hole 15 is provided at the rear side of the lower portion of the vertical portion 12. Through hole 15
A stopper device 17 for fixing the counterweight 10
The through hole 15 serves as a work hole for attaching / detaching the weight stopper bolt 36 shown in FIG. 6 in a standard specification vehicle.

As shown in FIGS. 2 to 4, the through hole 15 is a substantially rectangular hole having a rear surface side as a laterally widening frontage, and a circular hole 15a having a smaller diameter than the rectangular hole is formed on the inner side thereof. Is
The circular hole 15a is a stopper hole 4 (that is, the stopper hole 4 formed in the rear axle bracket 3 whose axial direction is the front-back direction).
It is formed to be approximately concentric with the mounting hole for the weight stopper bolt of a standard specification car and to have a slightly larger diameter.

Next, the stopper device 17 mounted in the through hole 15 will be described. The stopper device 17 mainly includes a stopper pin 18 that can be inserted into and removed from the stopper hole 4 of the rear axle bracket 3 and a stopper bracket 19 that supports the stopper pin 18, and has a stopper pin 18 insertion and holding means and a stopper pin 18. A pull-out holding means is provided.

The horizontal portion 19a of the stopper bracket 19 formed of an L-shaped plate is fixed on the bottom surface of the through hole 15 by the use of the drawbar insertion hole 16 by the locking pin 22 as a fixing member. Upright 19b
A stopper pin 18 having a large-diameter head portion 18a is attached to this so as to be slidable in the front-rear direction. The stopper pin 18 has a small diameter portion at its tip (front end) which can be inserted into and removed from the stopper hole 4 through the circular hole 15a, and is always provided with a flange 18b formed on the outer periphery thereof and the upright portion 1 of the stopper bracket 19.
It is held at the insertion position by the compression coil spring 20 elastically mounted between the compression coil spring 9 and 9b. That is, the compression coil spring 20 constitutes stopper pin insertion holding means.

The head 18a of the stopper pin 18 serves as a locking member which can be engaged with and disengaged from the locking pin 22 by rotating the stopper pin 18 around the axis at a position where the stopper pin 18 is pulled out from the stopper hole 4. A hook-shaped hanging metal fitting 21 is attached. That is, the hanging metal fitting 21 as the locking member
The stopper pin pull-out holding means is constituted by the locking pin 22 as a fixing member.

The locking pin 22 has a flange 22a at one end and a small-diameter screw 22b at the other end. The locking pin 22 is located below the through hole 15 in the trobar insertion hole 16 and the horizontal portion 19a of the stopper bracket 19. It is fixed by inserting it into the mounting hole from below and tightening the nut 23 to the screw 22b, and also serves as a mounting member for the stopper device 17. Further, the extension line of the axis of the locking pin 22 and the extension line of the axis of the stopper pin 18 are orthogonal to each other. Therefore, in the present embodiment, as shown in FIG. 3, the metal fitting 21 is provided in an inclined shape so that its front end locking piece 21a is located off the axis of the stopper pin 18 to avoid mutual interference during extraction. ing.

In the separated specification counterweight support device of the present embodiment constructed as described above, the horizontal portion 11 of the counterweight 10 mounted on the rear portion of the vehicle body is mounted on the upper surface of the vehicle body frame 1. At the same time, it is locked to the projection 2 via the recess 13, and the front surface of the vertical portion 12 is abutted and supported by the rear surface of the rear axle bracket 3. Then, as shown by solid lines in FIGS. 2A and 3, the state is fixed by the stopper pin 18 inserted into the stopper hole 4 of the rear axle bracket 3, and the state is held by the compression coil spring 20. Therefore, the counter weight 1
Zero is stably supported at the mounting position of the vehicle body.

On the other hand, as shown by phantom lines in FIGS. 2B and 3, the counterweight 10 is separated from the vehicle body by lifting the counterweight 10 with a crane or the like when the stopper pin 18 is pulled out from the stopper hole 18. You can
At this time, the stopper pin 18 can be held at the pulling-out position by engaging the hanging metal fitting 21 with the locking pin 22, so that it is not necessary for the operator to hold it by hand, and the separation work of the counterweight 10 is facilitated.

Now, the stopper device 17 according to the present embodiment.
Is provided on the side of the counter weight 10, and is configured to fix the counter weight 10 by utilizing the stopper hole 4 that is an attachment hole of the existing weight stopper bolt in the rear frame on the vehicle body side, specifically, the rear axle bracket 3. You can easily change from standard specifications to separate specifications. Therefore, it is not necessary to modify the structure of the vehicle body.

Moreover, the stopper device 17 has the through hole 15 and the draw bar insertion hole 16 existing in the counterweight 10.
Since the counter weight 10 is mounted by using the above, it is not necessary to perform special processing for mounting the stopper device 17 on the counter weight 10. That is, the counterweight support device according to the present embodiment can be applied without performing any processing on both the vehicle body side and the counterweight 10. Furthermore,
Since the stopper pin 18 can be operated near the opening of the through hole 15, the operation can be performed easily.

Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is a modification of the pull-out holding means for the stopper pin 18, and is different from the first embodiment in that the hanging metal fitting 21 as a locking member is formed of a ring. The hook 21 made of a ring is a stopper pin 18
Is rotatably assembled to the head portion 18a of the head via a ring holder 24, and the stopper pin 18 is pulled out in a state of being rotated upward as shown by an imaginary line in the drawing and then locked by a locking pin 22 as shown by a solid line in the drawing. be able to. The hanging metal fitting 21 may be changed to a flexible member such as a string.

[0028]

As described above in detail, according to the first aspect of the invention, the vertical portion of the counterweight mounted on the rear portion of the vehicle body and the existing mounting hole for the weight stopper bolt are used in the rear frame of the vehicle body rear portion. Then, since it is fixed with a stopper pin, it is possible to easily deal with standard specifications and separation specifications.
In addition, since it can be operated in the vicinity of the opening of the through hole by the stopper pin insertion / removal method, the attaching / detaching work of the counterweight is simplified, and the fixed state by the stopper pin is held by the stopper pin insertion holding means, so that it is stable. A fixed state is secured.

According to the second aspect of the present invention, the stopper pin can be pulled out from the through hole of the rear frame to separate the counterweight from the vehicle body and be held at that position.
The worker does not have to continue to hold the stopper pin, which makes the work easier. According to the invention of claim 3, since the stopper device is configured to be attached to the counterweight by utilizing the existing drawbar insertion hole, it is not necessary to perform special processing for attaching the stopper device.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a rear portion of a vehicle body showing a counterweight support device according to a first embodiment of the present invention.

2A and 2B are enlarged cross-sectional views of a stopper device, where FIG. 2A shows the counter weight fixed and FIG. 2B shows the counter weight separated.

FIG. 3 is a plan sectional view of a stopper device.

FIG. 4 is a rear view of the stopper device.

FIG. 5 is an explanatory diagram showing stopper pin pull-out holding means according to the second embodiment.

FIG. 6 is a side sectional view showing an example of a conventional counterweight support device.

FIG. 7 is a side sectional view showing another example of a conventional counterweight support device.

[Explanation of symbols]

 1 ... Body frame 3 ... Rear frame 4 ... Stopper hole (mounting hole for weight stopper bolt) 10 ... Counterweight 11 ... Horizontal part 12 ... Vertical part 15 ... Stopper mounting through hole 17 ... Stopper device 18 ... Stopper pin 19 ... Stopper bracket 20 ... Compression coil spring 21 ... Hanging metal fitting 22 ... Locking pin

Claims (3)

[Claims] 1. A counterweight in which a horizontal portion of a counterweight is mounted and locked on an upper surface of a rear portion of a vehicle body, and an inner surface of a vertical portion extending downward from the horizontal portion and covering the rear portion of the vehicle body is brought into contact with a rear surface of a rear frame of the vehicle body. In a counterweight supporting device for an industrial vehicle configured to support the above, the counterweight can be inserted into and removed from a stopper hole formed in the rear frame through a through hole formed in a vertical portion of the counterweight in the front-rear direction. A counterweight support device for an industrial vehicle provided with a stopper device having a stopper pin and a stopper pin insertion holding means for holding the stopper pin at the insertion position. 2. The stopper device is provided with stopper pin pull-out holding means for holding the stopper pin at a position pulled out from the stopper hole, and this holding means is provided on the fixing member fixed to the counter weight and the stopper pin. The counterweight support device for an industrial vehicle according to claim 1, further comprising: a locking member that is engaged with and disengageable from the fixing member. 3. The fixing member comprises a locking pin that can be mounted in a drawbar insertion hole formed in a vertical portion of the counterweight, and the locking pin also serves as a mounting member for fixing the stopper device to the counterweight. And claim 2
A counterweight support device for an industrial vehicle as described above.