JP2012091901A - Attachment type forklift in tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment type forklift in a tractor which is stable as the front of the tractor is not lifted, increases a movable range of the lift in a compact structure, and moreover can also move stably even in a loaded state.SOLUTION: The attachment type forklift is configured to include: a frame body 1 detachable from a connection part J of the rear of a tractor T, and composed of a frame body erected in a vertical direction; a detent-shaped fork member 2; a caster 3 equipped with rotatable wheels 31; a hose member 4 which can transfer a fluid pressure from a fluid power source; a fluid pressure cylinder 5 which is arranged in a substantially vertical erected state on a front face of the frame body 1, can be expanded and contracted by a fluid fed in via this hose member 4, and includes a hinge part 51 at the leading edge; and a rod-shaped lifting arm 6 which has one end hinge-connected to the connection part of the frame body 1 and the tractor T, while having the other end connected to the fork member 2.

Description

  The present invention is an improvement of an attachment-type forklift that is additionally used in agricultural tractors. More specifically, the front of the tractor is stable without being lifted, and the movable range of the lift is increased with a compact structure. In addition, the present invention relates to an attachment forklift in a tractor that can move stably even in a loaded state.

  As is well known, a tractor is used as a farm vehicle, and it is possible to plow soil by pulling a rotary, halo, plow or the like to the rear, or to transport an article by pulling a carrier.

  Also, in agricultural work, there are many cases in which agricultural products are loaded and transported on light trucks, etc., so there is a forklift that can lift and lower articles by using the power of the agricultural tractor as described above. It has been developed (see Patent Document 1).

  However, in the forklift described in <Patent Document 1>, since the support portion of the frame is lifted to the ground when the lift is lifted, when a heavy object is loaded on the forklift, the balance is lost and the lighter tractor There was a problem that the front wheel was lifted and it was very dangerous.

  In such a structure, since the lifting cylinder is directly fixed coaxially inside the frame, the movable range of the cylinder becomes the lifting movable range of the lift as it is, and it is inevitable to increase the movable range. In addition, it is necessary to increase the length of the piston of the cylinder, and there is a problem that the frame protrudes upward and the usability in work is deteriorated.

  Further, as a fulcrum for grounding the frame, there has been disclosed one that prevents the front wheel of the tractor from being lifted (see Patent Documents 2 and 3). There is a problem that the frame is rubbed because the member is not movable.

JP 59-48398 Japanese Utility Model Publication No. 6-35293 Japanese Utility Model Publication No. 55-63396

  The present invention has been made in view of the above-described problems in the conventional attachment-type forklift, and the object of the present invention is to prevent the front portion of the tractor from being lifted and to be stable. Another object of the present invention is to provide an attachment-type forklift in a tractor that has a compact structure, increases the movable range of the lift, and can move stably even when loaded.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention includes a frame main body 1 that is detachably attached to a connecting portion J at the rear portion of the tractor T, and includes a frame body standing in a vertical direction;
A claw-like fork member 2 supported on the rear side of the frame body 1 so as to be movable up and down;
A caster 3 that is disposed in contact with the lower end of the frame body 1 and includes a rotatable wheel 31;
A hose member 4 capable of transmitting fluid pressure from a fluid power source;
The frame body 1 is disposed in a substantially vertical standing state on the front surface of the frame body 1 and can be expanded and contracted by a fluid fed through the hose member 4, and a hinge 51 is provided at the tip. Fluid pressure cylinder 5;
The fluid pressure cylinder 5 is a rod-like member having an intermediate part hinged to the hinge part 51, one end hinged to the connecting part between the frame body 1 and the tractor T, and the other end being a fork member 2. The attachment-type forklift in the tractor was completed by adopting the technical means of comprising a bar-shaped lifting arm 6 connected to the

  Further, in order to solve the above-mentioned problems, the present invention employs technical means of providing a tilt mechanism 7 that can adjust the tilt angle of the front and rear of the fork member 2 in addition to the above means as necessary. .

  Furthermore, in order to solve the above-mentioned problems, the present invention is capable of adjusting the amount of fluid flowing into the hydraulic cylinder 5 through the hose member 4 in a small step in addition to the above means as necessary. The technical means of providing the mechanism 41 was adopted.

  Furthermore, in order to solve the above-described problems, the present invention employs technical means in which the hose member 4 can transmit the fluid pressure from the tractor T in addition to the above-described means as necessary.

  In the present invention, a frame main body comprising a frame body that is detachably attached to the rear connecting portion of the tractor and is vertically erected; A member that is disposed in contact with the lower end of the frame body and has a rotatable wheel; a hose member that can transmit fluid pressure from a fluid power source; and a front surface of the frame body. A fluid pressure cylinder which is arranged in a substantially vertical standing state, can be expanded and contracted by a fluid fed through the hose member, and is provided with a hinge at the tip; and the fluid pressure cylinder A rod-like member whose middle part is hinge-connected to the hinge part of the frame, one end of which is hinge-connected to the connecting part between the frame body and the tractor, and the other end is connected to a fork member. The tractor front part is stable without being lifted, and the movable range of the lift is increased with a compact structure, and it can move stably even when loaded. Therefore, it can be said that there is a very high practical utility value.

It is a perspective view showing the forklift of the embodiment of the present invention. It is a schematic side view showing the use condition of the forklift of an embodiment of the present invention. It is a schematic side view showing the use condition of the forklift of an embodiment of the present invention.

  The mode for carrying out the present invention will be described in more detail with reference to the drawings specifically illustrated as follows.

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, what is indicated by reference numeral 1 is a frame main body, and this frame main body 1 is composed of a frame body assembled from a rigid member such as metal and erected in the vertical direction.

  Also, what is indicated by reference numeral 2 is a fork member, and this fork member 2 is a member provided with a pair of claw portions 21 and 21 that can be inserted into a pallet or the like on which an article such as a crop is placed.

  Furthermore, what is indicated by reference numeral 3 is a caster, and this caster 3 includes a rotatable wheel 31. In this embodiment, a high strength material having a maximum load capacity of 500 kg or more is employed.

  Furthermore, what is indicated by reference numeral 4 is a hose member, and this hose member 4 is a member capable of transmitting fluid pressure from a fluid power source. In addition, while making the fluid of this embodiment into oil (oil), the fluid pressure from the fluid power source arrange | positioned at the tractor T can be transmitted. As the fluid power source, a supply hydraulic pump or the like (automatic or manual) can be separately installed.

  Furthermore, what is indicated by reference numeral 5 is a fluid pressure cylinder, and this fluid pressure cylinder 5 is arranged in a substantially vertical standing state on the front surface of the frame body 1 (between the tractor T). It can be expanded and contracted by a fluid fed through the hose member 4, and a hinge portion 51 is provided at the tip. In the present embodiment, a cylinder having a cylinder capacity of at least 10 tons is employed.

  Further, what is indicated by reference numeral 6 is a lifting arm, which is a rod-like member having an intermediate part hinged to the hinge part 51 of the fluid pressure cylinder 5, one end of which is the frame body 1. The other end is connected to the fork member 2. In this embodiment, each end of the chain 61 is fixed to the lower part of the frame body 1 and the fork member 2 and meshed with a sprocket 61 a provided on the lifting arm 6.

  Therefore, the configuration and usage method of this embodiment will be described below. First, the frame body 1 is detachably attached to the connecting portion J at the rear of the tractor T. A connecting portion J such as a rod for pulling a rotary or the like is usually provided at the rear portion of the tractor T, and the connecting portion J can be firmly connected and fixed by a jig such as a shackle.

  Then, the frame main body 1 is placed in a vertically standing state, and the caster 3 is always grounded at the lower end of the frame main body 1. In this embodiment, one is provided on each of the left and right sides.

  Next, the fork member 2 is supported on the rear surface side of the frame body 1 so as to be movable up and down. In the present embodiment, a pair of claw portions 21 and 21 are provided on the free end side, and the base end side bent in an L shape is engaged with a guide rail provided on the inner surface of the frame body 1. Can be moved up and down. Since the loading work by the forklift of this embodiment is mainly intended for loading and unloading light trucks on the loading platform, the highest point of the movable range of the claw portion 21 may be about 100 cm above the ground.

  In the present embodiment, a tilt mechanism 7 that can adjust the tilt angle (tilt angle) of the fork member 2 in the front-rear direction can be provided. Specifically, a telescopic cylinder member can be used, and it can be hung between the upper part of the frame main body 1 and the connection part J (refer FIG. 2 and FIG. 3). This cylinder member may be automatic or manual.

  Next, the fluid pressure cylinder 5 is disposed on the front surface of the frame body 1 in a substantially vertical standing state. In this embodiment, a hydraulic type is adopted. The fluid pressure cylinder 5 can be expanded and contracted by a fluid (oil) fed through the hose member 4.

  This fluid can use a fluid pressure system for moving the connecting rod at the rear of the tractor T. These fluids can be used in the same fluid pressure tank as a valve switching type or as an independent type. can do.

  A hinge portion 51 is provided at the tip of the fluid pressure cylinder 5, and an intermediate portion of the lifting arm 6 is hinged to the hinge portion 51.

  That is, the lift arm 6 has one end hinged to the connecting portion between the frame main body 1 and the tractor T, and the other end connected to the fork member 2, so that the fluid pressure cylinder 5 can be expanded and contracted. Then, the fork member 2 can be moved at a distance larger than the movable range (piston length).

  In the present embodiment, even if the fluid pressure cylinder 5 is slightly expanded and contracted, the moving distance of the fork member 2 becomes large, and it is necessary to adjust the minute distance, so that the fluid pressure cylinder 5 is connected via the hose member 4. It is possible to provide a flow rate adjusting mechanism 41 that can adjust the amount of fluid flowing in in small steps (stepwise or steplessly).

  According to the forklift in the present embodiment configured as described above, the frame body 1 is set up in the vertical direction, and the caster 3 is always grounded at the lower end portion. Therefore, even if the tractor is loaded on the lift, the front part of the tractor is not lifted and is stable, and it can move stably even when loaded.

  Further, if necessary, by supplying a fluid power source from the tractor T, the fork member 2 can be moved up and down with a compact mechanism while also serving as a fluid power source, thereby realizing the efficiency of farm work. be able to.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. The cylinder 5 is not limited to a hydraulic type, and may be a liquid type such as a hydraulic pressure or a pneumatic type.

  Further, the number of casters 3 can be increased. Furthermore, in the elevating arm 6, the fork member 2 can be increased by increasing the distance between the hinge portion 51 of the fluid pressure cylinder 5 and the front end portion on the fork member 2 side. It is also possible to increase the range of raising and lowering, and any of these is within the technical scope of the present invention.

1 Frame body 2 Fork member
21 Claw 3 Casters
31 Wheel 4 Hose member
41 Flow control mechanism 5 Fluid pressure cylinder
51 Hinge 6 Lifting arm
61 chain
61a Sprocket 7 Tilt mechanism T Tractor

Claims (4)

A frame main body (1) which is detachably attached to a connecting portion (J) at the rear of the tractor (T) and is a vertically extending frame;
A claw-like fork member (2) supported on the rear side of the frame body (1) so as to be movable up and down;
A caster (3) provided with a rotatable wheel (31) disposed in contact with the lower end of the frame main body (1);
A hose member (4) capable of transmitting fluid pressure from a fluid power source;
The frame body (1) is disposed in a substantially vertical standing state on the front surface of the frame body (1), can be expanded and contracted by a fluid fed through the hose member (4), and has a hinge ( A fluid pressure cylinder (5) provided with 51);
The fluid pressure cylinder (5) is a rod-shaped member having an intermediate part hinged to the hinge part (51), and one end is hingedly connected to the connecting part between the frame body (1) and the tractor (T). On the other hand, an attachment-type forklift in a tractor comprising: a rod-like lifting arm (6) whose other end is connected to a fork member (2).   The attachment-type forklift in a tractor according to claim 1, further comprising a tilting mechanism (7) capable of adjusting a tilting angle of the front and rear of the fork member (2).   The tractor according to claim 1 or 2, further comprising a flow rate adjusting mechanism (41) capable of adjusting the amount of fluid flowing into the fluid pressure cylinder (5) through the hose member (4) in a small step. Attachment-type forklift.   The attachment type forklift in a tractor according to any one of claims 1 to 3, wherein the hose member (4) is capable of transmitting fluid pressure from a fluid power source of the tractor (T).

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