JPS6127920Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for stabilizing a load loaded onto a forklift in a forklift by pressing a presser frame from above to stabilize the load during transportation.

When several wheels are stacked one on top of the other and transported by a forklift, the upper wheels are particularly likely to collapse. Therefore, if there is a device that prevents the cargo from collapsing, it would be convenient to transport the cargo without worrying about speed or vibration.

Therefore, the present invention was proposed, in which the upper part of the load is held down by a holding frame, and the holding frame is turned upward when not in use.

The present invention will be explained below with reference to the drawings.
A main body frame 2 and a pair of left and right L-shaped forks 3 are provided on the front surface of the machine. The fork 3 can be moved toward and away from the main body frame 2 in the left and right directions, and a wheel 4, for example, is mounted on the fork 3 at an appropriate interval.
It is designed to be transported in a stacked state.
A cylinder post 5 is provided upright at the upper end of the fork, that is, at the upper end of the main body frame 2. Also, the main body frame 2
Bearings 6, 6 are provided at the upper end of the shaft, and a hollow rotation support shaft 7 is supported by these bearings 6, 6.
A cam plate 8 is fixed to the periphery of the central portion of the rotation support shaft 7. The lower portion of the cam plate 8 is formed with an inclined portion 8a and a thick portion 8b, which gradually increase in thickness. An elevating cylinder 9 is disposed between the circumference of the cam plate 8 and the cylinder post 5. Further, rotary arms 10, 10 are integrally fixed to both left and right ends of the rotary support shaft 7. Bearings 11, 11 are provided at the tips of the rotating arms 10, 10, and a pivot 12 is provided in these bearings 11, 11. Reference numeral 13 denotes a presser frame or a presser plate, which is pivotally attached to the pivot shaft 12.

Therefore, when the elevating cylinder 9 now extends, the cam plate 8 rotates in the direction of arrow A in FIG.
The rotation support shaft 7 also rotates in the same direction A, and the rotation arms 10, 10 come to be lifted up and down together with the presser frame 13.

On the other hand, the upper sprocket 14, 1 is attached to the pivot 12.
4 is fixed. Further, lower sprockets 16, 16 are connected to the rotation support shaft 7 via bearings 15.
is rotatably provided, and this lower sprocket 1
Clutch plates 17, 17 are integrally provided at 6, 16. This clutch plate 17 has a fixing notch 17a into which a clutch pawl, which will be described later, can fit;
A partially annular release notch 17b is formed. Between the upper sprockets 14, 14 and the lower sprockets 16, 16 are chains 18, 1.
8 is wrapped around it. 19 is the clutch claw,
A groove 19a through which the clutch plate 17 passes is formed and extends from near the cam plate 8 to the bearing 6. A contact roller 20 is attached to one end of the clutch pawl 19, and the cam plate 8 comes into contact with this contact roller 20. A slot 19b into which a spring 21 is inserted is formed at the other end of the clutch pawl 19, and the other end of the spring 21 is surrounded by a spring case 22 fixed to the bearing 6.
Further, a dog 23 is fixed to the bearing 6 so as to contact the end face of the release notch 17b of the cam plate 8 located at the position shown in FIG.

Furthermore, a sliding contact piece 24 is provided on the front surface of the cylinder post 5.
An arm-side contact piece 25 is attached to the upper part of the rotating arm 10.

Next, the operation of the device configured in this way will be explained. First, in the case of elevation, when the elevation cylinder 9 is extended as described above, the rotating arms 10, 10
As the presser frame 13 descends, the presser frame 13 gradually descends. At this time, the clutch claw 19 is pushed outward to the left and right by the thick portion 8b of the cam plate 8, and the clutch plate 17 is in a state where it can freely rotate within the groove 19a. Therefore, the lower sprocket 16 and the upper sprocket 14 are free to rotate, and as a result, the presser frame 13 is also free to rotate around the pivot shaft 12. Thus, as the presser frame 13 tilts forward, the upper edge of the back side of the presser frame 13 contacts the sliding contact piece 24.
Approach the horizontal plane while hitting the .

When the presser frame 13 falls further downward and becomes almost horizontal, the back surface of the presser frame 13 hits the arm side contact piece 25 and stops there. During this period, when the contact roller 20 of the clutch pawl 19 moves relatively from the thick portion 8b of the cam plate 8 to the inclined portion 8a and further toward the main body, the clutch pawl 19 is pressed inward by the spring 21. At this time, the clutch plate 17 rotates with the rotation of the presser frame 13 until its fixing notch 17a coincides with the center of the clutch pawl 17, so that the clutch pawl 17 enters into the fixing notch 17a. As a result, rotation of the presser frame 13 around the pivot shaft 12 is fixed. The range of the angle of return θ ₁ until it is fixed is approximately 60°. After that, when the elevating cylinder 9 is further extended, the presser frame 13 remains fixed horizontally and rotates downward as the rotary arms 10, 10 are tilted forward, and the pressing force of the elevating cylinder 9 is then applied to the upper surface of the stacked wheels 4. This prevents the wheels 4 from collapsing. This horizontal angle range _θ2 is, for example, 60°.

When not in use, the elevating cylinder 9 is contracted and the cam plate 8 is rotated in the direction B, which is a reverse operation to the above-mentioned operation, so a description thereof will be omitted. However, when the rotating arms 10, 10 stand up almost vertically, the clutch plate 17 rotates as the presser frame 13 rotates.
The end face of the release notch 17b hits the dog 23, where the chains 18, 18 and the presser frame 13
rotation stops. As a result, the rotating arm 10,1
The rotation of 0 also stops.

As described above, according to the present invention, since the presser frame maintains a horizontal state within an angle θ ₂ near the horizontal line, it is possible to reliably press a load such as a wheel whose surface has a complicated shape from above and prevent the load from collapsing. Can be done. In addition, within the return angle θ ₁ range, the presser frame becomes free and can be stored above the fork when the rotary arm is erected, so the presser frame does not get in the way when not in use, making loading and unloading operations smooth. becomes. Furthermore, these operations can be performed only by operating the elevation cylinder, which is mechanically rational.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view of the main part, Fig. 4 is a sectional view thereof, and Figs. 5 a and b show the elevation angle and the clutch plate. FIG. 1...Dolly, 2...Main frame, 3...Fork,
4...Wheel, 5...Cylinder post, 6...Bearing, 7...Rotation support shaft, 8...Cam plate, 8a...
Inclined portion, 8b... Thick walled part, 9... Elevation cylinder,
10...Rotating arm, 11...Bearing, 12...Pivot, 13...Press frame, 14...Upper sprocket, 15...Bearing, 16...Lower sprocket, 17...Clutch plate, 17a...For fixing Notch, 17b...Release notch, 18...Chain, 19...Clutch pawl, 19a...Groove, 19b
...Slot hole, 20...Abutting roller, 21...Spring, 22...Spring case, 23...Dog, 24...Sliding contact piece, 25...Arm side abutting piece.

Claims (1)

[Claims for Utility Model Registration] (1) A cylinder post is erected at the upper end of the fork, a rotational support shaft is supported at the upper end of the fork, and a cam plate and a rotational arm are each integrated around this rotational support shaft. The lower sprocket is rotatably attached to the rotation support shaft,
An elevating cylinder is provided between the cylinder post and the periphery of the cam plate, a presser frame is pivotally connected to the tip of the rotary arm at its center, an upper sprocket is fixed around this pivot, and the lower sprocket is fixed to the lower sprocket. A clutch plate is provided integrally with the sprocket, and the clutch plate is fixed or released by a clutch pawl as the elevating cylinder advances and retreats and the cam plate rotates, and a chain is disposed between the upper sprocket and the lower sprocket. When the rotating arm is lifted up and down together with the presser frame by the operation of the lifting cylinder, and the lifting angle is within a predetermined horizontal angle range, the clutch pawl fixes the clutch plate and prevents the chain from rotating and moving. A load stabilizing device for a forklift, characterized in that the rotation of the presser frame is stopped at a position where the presser frame is in a horizontal state. (2) A fixing notch is formed on the periphery of the clutch plate to allow the clutch pawl to fit into the fixing notch, and the clutch pawl enters into the fixing notch, so that when the clutch pawl enters the fixing notch, A load stabilizing device for a forklift according to claim 1, wherein the clutch plate is fixed and is configured to be released when removed from the fixing notch. (3) The clutch pawl releases the clutch plate in the return angle range from approximately vertical to horizontal, and a contact piece whose front surface is a vertical plane is provided on the front surface of the cylinder post. established,
2. The load stabilizing device for a forklift as claimed in claim 1, wherein when the rotary arm rotates within the return angle range, the upper edge of the back side of the presser frame comes into sliding contact with the abutment piece.