JPH0735498U - Sheath fork device - Google Patents

Abstract

(57) [Summary] [Purpose] In a sheath fork device applied to a cargo handling vehicle such as a forklift, even if the tip of the sheath fork collides with another object, the luggage will not be damaged or the operator will not be injured. To do. [Structure] A fork 2, a sheath fork 3, a shock absorber 4, and an adjusting means 5 are provided, and in particular, a shock absorber 4 for cushioning the backward movement of the sheath fork 3 is provided for the fork 2 and a sheath for the fork 2. An adjusting means 5 is provided for allowing the rearward movement of the fork 3 to adjust the protrusion amount.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a sheath fork device applied to a cargo handling vehicle such as a forklift truck.

[0002]

[Prior art]

 Conventionally, as is well known, this type of sheath fork device includes a fork, a sheath fork externally fitted to the fork, and a retaining means for retaining the sheath fork from the fork. However, since such a product has a longer fork length than a normal fork, the tip of the sheath fork easily collides with other objects such as luggage, and the impact at that time may damage the luggage or injure the operator. I was afraid to do it.

[0003]

[Problems to be solved by the device]

 The present invention was devised to solve this problem in view of the above problems, and the purpose of the present invention is to break the load or operate the luggage even if the tip of the sheath fork collides with another object. The purpose of the present invention is to provide a sheath fork device which prevents the data from being injured.

[0004]

[Means for Solving the Problems]

 The sheath fork device of the present invention basically comprises a fork, a sheath fork externally fitted to the fork, a cushioning body for cushioning the rearward movement of the sheath fork with respect to the fork, and a fork. It is characterized in that it is composed of adjusting means that allows the rearward movement of the sheath fork and adjusts the protrusion amount.

[0005]

[Action]

 When the tip of the sheath fork collides with other objects such as luggage, the sheath fork moves backward with respect to the fork, and the shock at that time is not absorbed by the shock absorber and is not transmitted to the fork. At this time, since the adjusting means allows the fork to move backward from the sheath fork, there is no problem. The fork length can be changed by adjusting the forward projection amount of the sheath fork with respect to the fork by the adjusting means.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a sheath fork device according to a first embodiment of the present invention. The sheath fork device 1 is mainly composed of a fork 2, a sheath fork 3, a buffer body 4, and an adjusting means 5. The fork 2 forms a basic part of the sheath fork device 1, and in this example, a horizontal piece 6, a vertical piece 7 extending upward from a rear portion thereof, and a finger bar such as a forklift attached to a back surface of the horizontal piece 6. It is composed of a pair of upper and lower claw pieces (not shown) engaged with (not shown), and the first half has a wedge shape. The sheath fork 3 is fitted onto the fork 2 so as to be movable back and forth, and in this example, a frame member 8 having an inverted U-shaped cross section, a bottom plate 9 attached to close the lower part of the frame member 8, and an inner part. It has a fork pocket 10 formed on the right side to accommodate the horizontal piece 6 of the fork 2 from the rear side in a loosely fitted state, and a space 11 formed on the inner left side to accommodate the shock absorber 4, the first half of which has a wedge shape. Presents. The cushioning body 4 cushions the rearward movement of the sheath fork 3 with respect to the fork 2. In this example, the bracket 12 attached to the left side of the horizontal piece 6 of the fork 2 and the inner surface of the left side wall of the sheath fork 3. And a compression type gas damper 14 which is interposed between the brackets 13 and is housed in the space 11 of the sheath fork 3. The adjusting means 5 adjusts the amount of protrusion by allowing the rearward movement of the sheath fork 3 with respect to the fork 2. In this example, the horizontal U-shaped protrusion protruding rearward from the left end of the rear end of the sheath fork 3. A projecting piece 15, a long hole 16 formed by the projecting piece in the front-rear direction, and a plurality of screw holes 17 formed on the left side of the horizontal piece 6 of the fork 2 at predetermined intervals in the front-rear direction, The bolt 18 is loosely fitted in the elongated hole 16 and screwed into one of the screw holes 17 to allow the backward movement of the sheath fork 2 with respect to the fork 2 and prevent the forward movement thereof. Next, the operation will be described based on such a configuration. When the tip of the sheath fork 3 collides with another object such as luggage, the sheath fork 3 moves backward with respect to the fork 2 as shown by the arrow in FIG. The shock is absorbed and is not transmitted to the fork 2. At this time, the backward movement of the sheath fork 3 with respect to the fork 2 is allowed due to the relationship between the elongated hole 16 of the adjusting means 5 and the bolt 18. When the bolt 18 of the adjusting means 5 is inserted into the elongated hole 16 and replaced with another screw hole 17 and screwed, the protrusion amount of the sheath fork 3 with respect to the fork 2 is adjusted, and the fork length is adjusted. It can be changed.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the adjusting means 5 is screwed to the projecting piece 15, the elongated hole 16, the screw hole 17 and the bolt 18, as well as the screw hole 19 screwed on the rear portion of the projecting piece 15. It differs from the first embodiment in that an adjusting bolt 20 is fitted at its tip to the bolt 18. With such a structure, multi-step adjustment by replacing the bolt 18 and stepless adjustment by screwing the adjusting bolt 20 can be performed.

Although the gas damper 14 is used as the buffer body 4 in the previous embodiment, the buffer body 4 is not limited to this, and a spring or the like may be used. In the above embodiment, the adjusting means 5 is provided with the long hole 16 in the sheath fork 3 and the screw hole 17 in the fork 2, but the adjusting means 5 is not limited to this, and may be reversed, for example. Although the adjusting means 5 is provided between the fork 2 and the sheath fork 3 in the above embodiment, the adjusting means 5 is not limited to this, and is not limited to this, for example, between the fork 2 and the shock absorber 4, or between the sheath fork 3 and the shock absorber 4. You may provide in between. In the first embodiment, the adjusting means 5 is composed of the elongated hole 16, the screw hole 17, and the bolt 18, but not limited to this, for example, in addition to this, the bolt 18 and the rear portion of the elongated hole 16 and Spacers having different thicknesses may be provided between the two to finely adjust the distance.

[0009]

Effects of the Invention As described above, according to the present invention, the following excellent effects can be obtained. (1) It is composed of a fork, a sheath fork, a shock absorber, and an adjusting means. In particular, a shock absorber for absorbing the backward movement of the sheath fork is provided for the fork, and the backward movement of the sheath fork is allowed for the fork. Since the adjustment means for adjusting the protruding amount is provided, even if the tip of the sheath fork collides with another object, the luggage is not damaged or the operator is not injured. (2) Since the fork is provided with a cushioning member for buffering the backward movement of the sheath fork, and the fork is provided with an adjusting means for allowing the backward movement of the sheath fork to adjust the protrusion amount, the fork length can be reduced. It can be changed to accommodate different pallet sizes. (3) Since the fork is provided with a cushioning body for buffering the rear movement of the sheath fork, and the fork is provided with an adjusting means for allowing the rear movement of the sheath fork to adjust the protrusion amount, the tip of the sheath fork is adjusted. The fork length can be temporarily shortened by hitting the part to the extent that it does not damage the wall, and it is possible to turn with a smaller turning radius.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sheath fork device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing a second embodiment of the present invention.

[Explanation of symbols]

1 ... Sheath fork device, 2 ... Fork, 3 ... Sheath fork,
4 ... Buffer, 5 ... Adjusting means, 6 ... Horizontal piece, 7 ... Vertical piece,
8 ... Frame material, 9 ... Bottom plate, 10 ... Fork pocket, 11 ...
Space, 12, 13 ... Bracket, 14 ... Gas damper, 1
5 ... Projection piece, 16 ... Oblong hole, 17 ... Screw hole, 18 ... Bolt, 1
9 ... Screw holes, 20 ... Adjustment bolts.

Claims (1)

[Scope of utility model registration request] 1. A fork, a sheath fork externally fitted to the fork so as to be movable back and forth, a shock absorber for buffering the rear movement of the sheath fork with respect to the fork, and allowing the rear movement of the sheath fork with respect to the fork. A sheath fork device characterized by being configured with an adjusting means for adjusting the amount of protrusion.