JP2019108208A - Curtain guard for forklift - Google Patents

Abstract

To provide an inexpensive curtain guard for a forklift which can exert sufficient effect as a curtain guard even for a type of a forklift whose gap between a back rest and a mast is narrow.SOLUTION: There is provided a curtain guard 12 installed on a forklift which includes: a mast 3 having an outer mast 3a and an inner mast 3b; a lift bracket 5 disposed on the mast 3; and a fork 4 disposed on the lift bracket 5, wherein the curtain guard 12 for the forklift includes a guard part 12b, a stationary part 12a, a holding part 12d and an elastic part 12c for the guard part 12b to vertically move about the stationary part 12a as an axis, and includes a ring part 12e in which a plurality of cylindrical rings are arranged so as to cover the guard part 12b. There is also provided a curtain guard 121 for a forklift including an elastic part 121c.SELECTED DRAWING: Figure 4

Description

The present invention provides a curtain guard for a forklift provided to prevent contact between a band-like Noren type insect control curtain attached to the entrance and the chain gear, a chain, an upper roller, etc. of the forklift when the forklift enters and leaves a warehouse or the like. It is about

  In the warehouse where products are stored, Noren's insect repellent in which several strips of strip-like sheets made of PVC and other materials are suspended at the entrance to prevent entry of insects such as flying insects coming from the outside I have installed a curtain. The insect curtain can go in and out of the sheet like "Noren" when people pass through it, and when it is not in or out, it shuts down flying insects etc. that are invaded from the outside by the insect curtain. it can.

  When goods are delivered and received, the fork lift is used to move in and out of the warehouse for transportation, but when the fork lift passes through the entrance where the insect repellent curtain is installed, the insect repellent curtain is provided by the mast provided in front of the forklift car body You can push through and pass. The mast is composed of an inner mast and an outer mast. The chain gear, chain, upper roller, etc. are installed in the mast in a state of being partially protruded, and have the role of an elevation mechanism for raising and lowering the fork. doing.

  Grease is sufficiently applied to elevating mechanisms such as chain gears, chains, and upper rollers installed in the mast to facilitate lifting and lowering. When entering and exiting with a forklift, insect repellent with strip-like sheet in strip form There is a problem that the curtain may be contaminated or damaged by contact with a chain gear, a chain, an upper roller, etc. inside the mast.

Therefore, as a device for preventing the insect curtain from coming into contact with the inside of the mast or the lifting mechanism by the entry and exit of the forklift, the mast having the outer mast forming the outside and the inner mast forming the inside and the lift bracket disposed on the mast And, in the curtain guard installed on a forklift having a fork disposed on the lift bracket, the curtain guard is the upper end face of the inner mast side so that the front of the curtain guard passes through the rear of the mast and the backrest when the fork is lifted. A curtain guard for a forklift described in Patent Document 1 in which a curtain guard is installed has been proposed.

Utility model registration No. 3071702 JP 2005-15130 A JP, 2015-221695, A

  Although the strip curtain pollution prevention tool described in Patent Document 1 is a type attached to the inner mast side, since the guard for pushing out the curtain forms a substantially T-shape, the curtain has a hook-like depression When pushed away from the body, there is a problem that it gets around from both ends of the body and gets inside the body. Therefore, there is still a problem that a part of the curtain that has entered the mast side contacts with a greased chain or the like and becomes dirty. In addition, although the short curtain stain protection tool is attached to the inner mast side, when trying to raise the fork to the height of the top, the short curtain stain protection tool protrudes in the direction in which the fork is installed I will. Therefore, when trying to raise the fork up to the top of the forklift while the strip curtain stain prevention tool is attached, the strip curtain stain prevention tool collides with the upper end face of the backrest, and the strip curtain stain In addition to the deformation or destruction of the preventing tool itself, there is a problem that the upper surface of the backrest is also damaged by collision.

  Then, in order to solve the problem of patent document 1, the curtain guard for forklifts of patent document 2 is devised. However, since the curtain guard for forklifts of patent document 2 is attached to the outer mast side, when the lift bracket and the fork rise, the guard of the curtain guard strikes the fork, so that the guard is bounced upward. There is. Therefore, in the curtain guard of Patent Document 2, a mounting plate for extending the guard mounting unit forward is fixed to the outside of the guard mounting unit, one end of the biasing unit is connected, and the other end of the biasing unit is the guard The curtain guard structure is complicated because the mounting plate and the long side are pressed so that the card is held in a transverse state, so that the cost of the member is increased. There is a problem that

In addition, when the height of the fork is raised to the height of the uppermost part by raising the inner mast installed inside the outer mast with the curtain guard attached to the outer mast, mounting on the outer mast side The curtain guard that has been in contact with the fork must continue to be pushed away by the fork while keeping it more nearly in vertical parallel than the letter C or letter C until the fork rises and passes. Then, after the fork passes to the top, the curtain guard returns to the normal position, and the curtain guard contacts the fork even when the fork raised to the top height is lowered again to return to the original position. While keeping the state close to the vertical parallel than the reverse C character or reverse C character, you have to keep being pushed away by the fork. Therefore, it is necessary to devise a structure that allows strong connection between the mounting plate to which the biasing means is connected and each long-side connection, and extreme stress is added to the biasing means each time the fork is repeatedly raised and lowered. It is a structure in which deterioration of members used for biasing means is likely to proceed and problems with durability arise.

  In addition, since forklifts are required to have a periodic self-assessment inspection once a year, if there is no person who holds a mechanic license in the company, they will request the manufacturer to perform an inspection. Therefore, when attaching the curtain guard of Patent Document 2 to the outer mast, it is necessary to make a hole in the outer mast and fix it with a bolt, a nut, etc. There is a possibility of not passing.

Therefore, in order to solve the problem of Patent Document 2, we have invented the invention of the curtain guard for forklift of Patent Document 3. The curtain guard for forklift in Patent Document 3 forms a cylindrical pipe in a substantially O-shape, and when the fork is raised, an inner mast for a part of the curtain guard to pass between the mast 3 and the backrest. It is a curtain guard for forklift installed at the upper end of the side. Therefore, it has the effect | action which prevents that a curtain penetrates into mast inside. Also, when the fork rises to the top level, a part of the curtain guard gets between the backrest and the mast, so that it has the advantage of being able to raise the fork to a position near the top level. doing. However, due to differences in forklift manufacturers and models, there is a type of forklift whose gap between the backrest and the mast is narrow, and if a curtain guard with a thin tubular pipe is attached to match the structure, the guard range As a result, the effect of the curtain guard is diminished, and there is a problem that a part of the curtain that has got inside the mast comes in contact with a greased chain etc. and becomes dirty.

An object of the present invention is to solve the above-mentioned problems and to provide an inexpensive forklift curtain guard that exhibits the effect as a curtain guard even in a forklift having a narrow gap between the backrest and the mast. .

  The invention according to claim 1 is a curtain installed on a forklift having a mast having an outer mast forming an outer side and an inner mast forming an inner side, a lift bracket disposed on the mast, and a fork disposed on the lift bracket In the guard, the curtain guard includes a guard portion that pushes the curtain away, a fixing portion installed on the upper end surface on the inner mast side, a holding portion for holding the fixing portion on the upper end surface on the inner mast side, and the guard portion It is a curtain guard for forklifts which has an elastic part for moving up and down centering on the fixed part as an axis, and a ring part which can be inserted so that a plurality of cylindrical rings cover the guard part.

The invention according to claim 2 is a curtain guard for a forklift, further including a ring portion having an inner diameter larger than the outer diameter of the guard portion.

  The invention according to claim 3 further includes a curtain guard installed on the upper end surface on the inner mast side so that the front part of the curtain guard passes the rear of the mast and the backrest when the fork is lifted. It is a curtain guard for.

  The invention according to claim 4 is a curtain guard for a forklift, further including a curtain guard installed via the elastic portion.

The invention according to claim 5 is a curtain guard for a forklift, further including a curtain guard in which a rod is formed in a substantially O-shape.

The invention according to claim 6 is a curtain guard for a forklift, further including a curtain guard installed on a top plate of an inner frame connected to a position close to the upper end of the inner mast.

The invention according to claim 7 is a curtain guard for a forklift, further including elastic parts incorporated at two positions close to both ends of the fixed part.

The invention according to claim 8 is a curtain guard for a forklift, further including an elastic portion incorporated between the holding portion and the fixing portion.

An object of the present invention is to provide an inexpensive forklift curtain guard that exerts an effect as a curtain guard even in a forklift having a narrow gap between the backrest and the mast.

It is a perspective view which shows the state which attached the curtain guard of this invention to the forklift. It is the side view which showed the state of FIG. It is a top view which shows the state which looked at FIG. 1 from right above. It is the top view which showed the curtain guard of this invention. It is sectional drawing which shows the state which cut a-a 'of FIG. It is the enlarged view to which b part of FIG. 4 was expanded. It is the side view which expanded the curtain guard area | region shown in FIG. It is the side view which raised the fork from the state shown in FIG. 7, and showed the state which a curtain guard hits a lift bracket. It is the side view which raised the fork from the state shown in FIG. 8 further, and the curtain guard lifted by the lift bracket. It is the side view which showed operation | movement of the curtain guard of this invention. It is the top view which showed different Embodiment 2 of the curtain guard of this invention. It is the side view which showed the state which passes the Noren type insect repellent curtain, without mounting the curtain guard of this invention to a forklift.

  As shown in FIGS. 1 to 3, a forklift generally available on the market is configured of a vehicle body 1 and a cargo receiving device 2 installed in front of the vehicle body 1. The receiving device 2 includes a pair of left and right masts 3, a fork 4 and a fork 4, and a lift bracket 5 that moves up and down along the mast 3. The mast 3 has a pair of left and right outer masts 3a and a pair of left and right inner masts 3b. The lower ends of the outer masts 3a are fixed to the vehicle body 1. The upper end of the inner mast 3b is partially connected by the inner frame 3c, and is supported by the lift cylinder 6 attached to the outer mast 3a via the inner frame 3c.

Further, in the inner mast 3b, the rollers 7 are installed at the upper and lower positions of the outer mast 3a in order to enhance the stability of the elevation of the inner mast 3b, and the lift cylinder 6 extends and contracts along the outer mast 3a. The inner mast 3b is raised and lowered. Therefore, as shown in FIG. 6, a portion of the upper roller 7 is installed in a state of protruding above the upper surface of the inner mast 3b.

Furthermore, as shown in FIG. 1 to FIG. 3 and FIG. 6, the chain gear 8 fixed to a position close to the upper end of the inner mast 3b is rotatably supported and provided to be able to move up and down while guiding the inner mast 3b. A chain 9 connected to the lift bracket 5 is wound. The lift bracket 5 is provided with a finger bar 10 extending in the vehicle width direction and a backrest 11 for preventing the load from collapsing rearward when the load is placed on the fork 4. Further, on the finger bar 10, a pair of left and right forks 4 separated from each other in parallel in the vehicle width direction are attached. Lubricating oil such as grease is applied to the roller 7, the chain gear 8, the chain 9, and the like in order to facilitate the vertical movement.

The curtain guard 12 according to the present invention, as shown in FIGS. 3 and 4, includes a guard portion 12b formed by bending a cylindrical rod-like metal rod such as aluminum or stainless steel into a U-shape and a rod-shaped fixing portion 12a. By joining, the shape which formed the D-shape of D is comprised. However, the shape is not limited to the D-shape, and the junction between the guard portion 12b and the fixing portion 12a is curved to form a substantially O-shape, or the front guard portion 12b is not curved, and the opening is formed. You may form a letter shape. 5 is a cross-sectional view showing a state of cutting from a to a 'shown in FIG. 4, and FIG. 6 is an enlarged view of a portion b of FIG. As shown in FIGS. 5 and 6, a plurality of ring-shaped ring portions 12e having an inner diameter larger than the outer diameter of the card portion 12b is fitted in the guard portion 12b.

In addition, a space is provided between the guard portion 12b and the ring portion 12e as shown in FIG. 5, and the air in the space can be a plurality of adjacent ring portions 12e and ring portions as shown in FIG. Since it can come in and out from the gap 14 between 12e, it is effective in suppressing the generation of static electricity due to the contact between the guard portion 12b and the ring portion 12e. That is, in the forklift equipped with the curtain guard 12 of the present invention, when trying to push the insect-proof curtain z away and pass it, the plurality of ring portions 12e in contact with the insect-proof curtain z Since it rotates, it has the effect of preventing entrapment and adhesion of the insect control curtain z due to static electricity or the like.

Thus, even in the case of a forklift having a narrow gap between the backrest 11 and the mast 3, the ring guard 12e and the insect control curtain are mounted by attaching the curtain guard 12 of the present invention in which the diameter of the guard 12b is reduced. When z contacts, the insect control curtain z can be pushed away while passing while the ring 12e rotates about the guard 12b made of a cylindrical metal rod. The rotation action of the plurality of installed ring portions 12e can prevent entrapment and adhesion of the insect control curtain z, and a part of the insect control curtain z does not enter inside the mast 3 and the lower end of the insect control curtain z always on the forward direction side As a result, the curtain guard 12 for a forklift can be provided which is free from the problem of contamination by contact with a greased chain or the like. Further, by forming the inner diameter of the ring portion 12e to be larger than the outer diameter of the card portion 12b, when the insect control curtain z passes, it is pushed by the weight of the insect control curtain z, and the ring portion 12e takes the guard portion 12b as an axis. Since it moves while being pushed up and down and back and forth, it is possible to use a card with a thin diameter. Furthermore, using a sliding bearing made of a resin having a self-lubricating effect, in which a reinforcement and a solid lubricant are optimally added to a tribopolymer excellent in abrasion resistance, is more effective as a material of the ring portion 12e. it can. Specifically, a product called iglidur® slide bearing sold by Igus Co., Ltd. can be used as the ring portion 12e.

Moreover, as shown in FIG.2 and FIG.3, the curtain guard 12 of this invention can exhibit a function by mounting to the top plate of the inner frame 3c connected with the inner mast 3b. That is, even if the height of the fork 4 is raised to the height of the uppermost portion by raising the inner mast 3b installed inside the outer mast 3a, the guard portion 12b is the backrest 11 and the mast 3 The fork 4 can be raised to a position near the height of the topmost part. Furthermore, when the fork 4 tries to rise to the height of the uppermost portion from the state where the guard portion 12b gets in between the backrest 11 and the mast 3 and the fork 4 is raised to a position close to the uppermost height. Even if the elastic portion 12c shown in FIG. 10 has a rubber material, the guard portion 12b is pushed up by the upper end of the lift bracket 5, and the elastic force of the elastic portion 12c of the guard portion 12b functions as a hinge. Because it can be lifted together, there is no concern of scratching the curtain guard 12 or forklift. In addition, even if the cardboard box containing the goods on the fork is dislocated, it rides on the upper end face of the backrest 11 and is caught between the fork 4 and the curtain guard 12. The cardboard box which has been sandwiched between the curtain guards 12 does not have to be damaged by the elasticity of the elastic part 12 c of the curtain guard 12 and the goods and goods entered cardboard boxes.

Thus, as shown in FIG. 10, the curtain guard 12 of the present invention sandwiches the elastic portion 12c of the rubber material between the fixing portion 12a and the holding portion 12d. When the fork 4 is raised from the state shown in FIG. 7, the guard portion 12 b contacts the upper end of the lift bracket 5 as shown in FIG. 8. FIG. 9 shows a state in which the fork 4 is further raised to the height of the top from the state of FIG. 8, but when contacting with the upper end of the lift bracket 5, the curtain guard 12 for forklift of the present invention The guard 12b is lifted by the elastic force of the rubber material. Therefore, in order to absorb the force applied when the guard portion 12b is lifted up against the upper end of the lift bracket 5, the elastic portion 12c is incorporated so as to be sandwiched in the holding portions 12d installed at two places on the left and right. The force is dispersed by the elastic portion 12c, the applied stress is halved, the load applied to the elastic portion 12c is reduced, the product is unlikely to deteriorate, and a durable product can be provided.

Even when the curtain guard 12 of the present invention is attached to the upper end of the inner mast 3b, the same effect is exhibited. The upper end surface on the inner mast 3b side means the upper end of the inner mast 3b and the top plate of the inner frame 3c. The guard portion 12b connects the fixing portion 12a to the upper end surface of the inner frame 3c with the holding portion 12d so as to pass through the rear of the backrest 11 as shown in FIGS. 3 and 7 when the fork 4 is lifted. It is good for the holding part 12d to use a metal fitting for connection which can be attached without making a hole in the inner frame 3c or the like. In addition, the holding portion 12d including the elastic portion 12c may use a vibration isolation unit used for a buffer / vibration isolation / rocking device or the like. Further, the ring portion 12e may use a slide bearing made of resin.

  The state where the curtain guard 12 of the present invention is installed on the top plate of the inner frame 3c is shown in FIG. 7 or FIG. 8, but installed with the U-shaped curved tip of the guard portion 12b inclined obliquely downward. As shown in the upper drawing of FIG. 10, the inclination angle x is held at a position of about minus 15 degrees. Next, FIG. 9 shows the case where the fork 4 has risen to the height of the top, but the U-shaped tip of the guard portion 12b is the upper end of the lift bracket 5 as shown in the lower view of FIG. Even when the fork 4 is raised to the height of the uppermost part, the inclination angle y is stopped at a position of about plus 15 degrees even when the fork 4 is raised to the height of the top. Therefore, the motion of the guard portion 12b of the curtain guard 12 of the present invention can be pushed up by only about angle x 15 degrees + angle y 15 degrees = angle 30 degrees at the maximum, so it has a structure with less stress on the elastic part 12c. Can provide durable products.

  FIG. 7 is a schematic view showing the curtain guard 12 of the present invention mounted on a forklift and passing the Noren type insect repellent curtain z, but as shown in FIG. 6, lubricating oil such as grease is sufficiently applied. Since the forklift can be passed without contacting the roller 7, the chain gear 8 and the chain 9, the contamination of the insect control curtain z can be effectively prevented. On the other hand, FIG. 12 shows a state in which the Noren type insect repellent curtain z is to be passed in a state where the curtain card of the present invention is not attached, but the insect repellent curtain z directly contacts the roller 7 Of course, there is a possibility that the chain 9 may be touched.

As curtain guard 121 of further another embodiment 2, as shown in Drawing 11, elastic parts 121c, such as anti-vibration rubber, are joined to two places of a position near both ends in fixed part 12a. The anti-vibration rubber used as the elastic portion 121c is a rubber product assembled to prevent transmission of vibration or impact to the device or structure, or to suppress noise, and is used for bonding to the anti-vibration rubber. The bolt and the nut of the above are embedded, so that they can be easily incorporated into the fixed portion 12a.

Reference Signs List 1 vehicle body 2 receiving device 3 mast 3a outer mast 3b inner mast 3c inner frame 4 fork 5 lift bracket 6 lift cylinder 7 roller 8 chain gear
9 chain 10 finger bar 11 backrest 12 curtain guard 121 curtain guard 12a fixed part 12b guard part 12c elastic part 121c elastic part 12d holding part 12e ring part 13 space 14 gap x inclination angle y inclination angle z insect control curtain

Claims (8)

  A curtain guard mounted on a forklift having an outer mast forming an outer and an inner mast forming an inner, a lift bracket disposed on the mast, and a forklift having a fork disposed on the lift bracket, the curtain guard including a curtain The guard part which pushes away, the fixed part installed in the upper end face by the inner mast side, the holding part for holding the fixed part to the upper end face by the inner mast side, and the guard part moves up and down around the fixed part as an axis A curtain guard for a forklift, comprising: an elastic portion for carrying out, and a ring portion installed so that a plurality of cylindrical rings cover the guard portion. The curtain guard for a forklift according to claim 1, further comprising a ring having an inner diameter larger than the outer diameter of the guard.   The curtain guard according to claim 1 or 2, further comprising: a curtain guard installed on the upper end surface on the inner mast side so that the front of the curtain guard passes through the rear of the mast and the backrest when the fork is lifted. Curtain guard for forklift.   The curtain guard for forklifts according to any one of claims 1 to 3, further comprising a curtain guard installed through the elastic portion. The curtain guard for forklifts according to any one of claims 1 to 4, further comprising a curtain guard having a rod-like shape formed in a substantially O-shape. The curtain guard for forklifts according to any one of claims 1 to 5, further comprising a curtain guard installed on a top plate of the inner frame connected to a position close to the upper end of the inner mast. The curtain guard for forklifts of Claim 1 thru | or 6 which further contains the elastic part integrated between the said holding | maintenance part and the said fixing | fixed part. The curtain guard for forklifts of Claim 1 thru | or 6 which further contains the elastic part integrated in two places of the position near the both ends of the said fixing | fixed part.