WO2016016935A1

WO2016016935A1 - Head guard for forklift

Info

Publication number: WO2016016935A1
Application number: PCT/JP2014/069881
Authority: WO
Inventors: 明浩石神; 朋之早川
Original assignee: ニチユ三菱フォークリフト株式会社
Priority date: 2014-07-29
Filing date: 2014-07-29
Publication date: 2016-02-04

Abstract

The purpose of the present invention is to provide a head guard for a forklift, the head guard being capable of being manufactured at reduced cost. The head guard is provided with a roof having: a top plate section (51) having a rectangular shape in a plan view, the top plate section (51) being provided at the center of a plate-like body (50) which is flat and has a uniform thickness; a left and right pair of side plate sections (52) provided at both side edges of the plate-like body (50) and bent at right angle to the upper surface of the top plate section (51); a front plate section (53) provided at the front edge of the plate-like body (50), the front plate section (53) being bent in the same direction as the side plate sections (52) relative to the top plate section (51) and being joined to the side plate sections (52); and a rear plate section (54) provided at the rear edge of the plate-like body (50), the rear plate section (54) being bent in the same direction as the side plate sections (52) relative to the top plate section (51) and being joined to the left and right pair of side plate sections (52).

Description

Forklift head guard

The present disclosure relates to a forklift head guard.

For forklifts used to transport and unload various types of luggage, when loading and unloading the load to a high place, if the load falls due to a load collapse, etc., the head as a protective device to protect the operator from the load A guard is attached.
The head guards are a pair of left and right front supports disposed at intervals in the vehicle width direction at the front of the forklift and a pair of left and right pairs disposed at intervals in the vehicle width direction at the rear of the vehicle. It has a side post and a roof installed between the front side post and the rear side post, and has a rigid structure to protect the operator from falling luggage.
Patent Document 1 describes a roof formed of a substantially rectangular frame-shaped outer frame integrally extended from a supporting column and an inner frame formed by combining reinforcing materials in a lattice shape on the inner side of the outer frame. It is done.

JP 2001-213596 A

However, in order to obtain sufficient strength, the above-mentioned roof is made of various materials such as hollow material and solid material, and since reinforcing materials are combined and welded in a grid form, material cost, welding The cost required for joining work such as work was high, and the manufacturing cost of the head guard could not be reduced.
At least one embodiment of the present invention is made in view of the above-mentioned subject, and it aims at providing a headguard which can reduce manufacturing cost.

(1) In at least one embodiment of the present invention, a top plate portion having a rectangular shape in a plan view and provided at the center of a plate-like body, and provided on both side edges of the plate-like body adjacent to the top plate portion A pair of left and right side plates bent at a right angle to the upper surface of the top plate, and the front edge of the plate-like body provided adjacent to the top plate and facing the upper surface of the top plate And a front plate portion which is bent and joined to the side plate portion, and is provided adjacent to the top plate portion at a rear edge portion of the plate-like body, and is bent at a right angle to the upper surface of the top plate portion And a rear plate portion joined to the side plate portion.
According to at least one embodiment of the present invention, the roof is formed of a plate-like body, so the number of bonding points can be reduced. As a result, the number of joining operations such as welding can be reduced, and the manufacturing cost of the head guard can be reduced while maintaining sufficient strength.

(2) In some embodiments, in the head guard of the forklift described in the above (1), the roof is provided on a front upper surface of the top plate portion, and the left and right side plate portions are connected to each other It is preferable to have a 1st reinforcement part and a 2nd reinforcement part provided in the rear upper surface of the said top plate part, and mutually connecting the said left and right side plate parts.
In this way, the roof is robust.

(3) In some embodiments, in the head guard of the forklift described in the above (2), the first reinforcing portion is formed by bending a long rectangular steel plate into a groove shape, and both of the groove shape are formed. It is preferable that the opening edge portion be in the shape of a pipe by being joined to the upper surface of the top plate portion.
In this way, the pipe-shaped reinforced portion can be formed by a simple method of processing a long rectangular steel plate into a groove and joining it to the top plate portion.

(4) In some embodiments, in the head guard of the forklift described in the above (2) or (3), the second reinforcing portion may be L obtained by bending a long rectangular steel plate at a right angle along the longitudinal direction. The L-shaped end is joined at a right angle to the upper surface of the top plate, and the other end of the L is joined at a right angle to the rear plate. It is preferable that it has a pipe shape.
In this way, it is possible to form the pipe-shaped reinforcing portion by a simple method of L-processing a long rectangular steel plate and joining it to the top plate portion and the rear plate portion.

(5) In some embodiments, in the head guard of a forklift described in any one of the above (2) to (4), the roof includes the first reinforcing portion and the second reinforcing portion. It is preferable to have a crosspiece installed between them.
This makes the roof more robust.

(6) In some embodiments, in the head guard of the forklift described in the above (5), it is preferable that the crosspieces be formed in an arc shape that is convex upward.
In this way, the strength of the crosspieces is improved.

(7) In some embodiments, in the head guard of the forklift described in any one of the above (1) to (6), the roof has a support for fixing the roof to the body of the forklift, the roof Is joined to the lower surface of the top plate portion, a reinforcing plate provided with a rectangular positioning hole to be fitted with the column, and a side surface portion of the column fitted along the positioning hole and joined to the positioning hole is joined And a guide plate.
In this way, the positioning of the support is easy, and the joint strength is high.

(8) In some embodiments, in the head guard of the forklift described in (7), it is preferable that a space be provided between the lower surface of the top plate portion and the upper end surface of the support to fix the support. .
In this way, even if the roof is distorted by the joining operation such as the welding operation, the mounting length of the support can be adjusted.

As described above, according to at least one embodiment of the present invention, since the roof is formed of a plate-like body, the number of bonding points can be reduced. As a result, the number of joining operations such as welding can be reduced, and the manufacturing cost of the head guard can be reduced.

It is a perspective view showing a forklift with a head guard concerning one embodiment of the present invention. It is a perspective view showing a head guard concerning one embodiment of the present invention. It is a top view of the head guard shown in FIG. It is a bottom view of the head guard shown in FIG. FIG. 5 is a cross-sectional view taken along line VV shown in FIG. It is a figure for demonstrating the structure of the roof shown in FIG. It is a figure which shows the support column joined to the roof and a roof. It is an enlarged view of the A section shown in FIG. It is a figure explaining adjustment of the attachment length of a support | pillar. It is a perspective view showing a head guard concerning one embodiment of the present invention. It is a top view of the head guard shown in FIG. It is a bottom view of the head guard shown in FIG. FIG. 11 is a cross-sectional view taken along line XIII-XIII shown in FIG. It is a figure for demonstrating the structure of the roof shown in FIG. It is a figure which shows the support column joined to the roof and a roof. It is an enlarged view of B section shown in FIG. It is a figure explaining adjustment of the attachment length of a support | pillar.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as the embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely illustrative. Absent.
For example, a representation representing a relative or absolute arrangement such as “in a direction”, “along a direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” is strictly Not only does it represent such an arrangement, but also represents a state of relative displacement with an angle or distance that allows the same function to be obtained.
For example, expressions that indicate that things such as "identical", "equal" and "homogeneous" are equal states not only represent strictly equal states, but also have tolerances or differences with which the same function can be obtained. It also represents the existing state.
For example, expressions representing shapes such as quadrilateral shapes and cylindrical shapes not only represent shapes such as rectangular shapes and cylindrical shapes in a geometrically strict sense, but also uneven portions and chamfers within the range where the same effect can be obtained. The shape including a part etc. shall also be expressed.

On the other hand, the expressions "comprising", "having", "having", "including" or "having" one component are not exclusive expressions excluding the presence of other components.

FIG. 1 is a perspective view showing a forklift equipped with a head guard according to an embodiment of the present invention.
The forklift 1 includes a vehicle body 2, a luggage lifting device 3 mounted on the front of the vehicle body 2, and a head guard 4 for protecting a driver's seat provided on the vehicle body 2. The vehicle body 2 includes a front wheel 21 which is a driving wheel, a rear wheel 22 which is a steering wheel, and a counterweight 23 which brings the rear wheel 22 into close contact with a road surface. And a traveling and working device such as a rear wheel steering device. In addition, the driver's seat is provided with a steering wheel (not shown) and a seat on which an operator sits.

The vehicle body 2 has a rectangular basic cross section in the vehicle width direction, extends in the longitudinal direction of the vehicle, and a pair of left and right side frames having an interval in the vehicle width direction, and the pair of left and right side frames in the vehicle width direction And a plurality of cross members arranged at intervals in the front-rear direction. Further, the space between the left and right side frames is covered with an engine cover, and the above-described seat is disposed on the upper surface of the engine cover. Further, the vehicle body 2 is formed to have high strength and high rigidity because the counterweight 23 and the like are connected via the cross member.

The luggage lifting device 3 has a fork (claw) 31 with an L-shaped side view for placing a luggage, a backrest 32 to which the fork 31 is attached, and a mast 33 for slidably supporting the backrest 32 in the vertical direction. And a lift chain (not shown) for sliding the backrest 32 in the vertical direction. Further, an auxiliary mast (not shown) which is slidably engaged with the mast 33 in the vertical direction inside the mast 33 and lifts the backrest 32 further upward than the upper end of the mast 33; And a tilt cylinder (hydraulic pressure) (not shown) for adjusting the tip of the fork 31 by inclining the auxiliary mast. Thereby, the fork 31 is inclined (adjusted) up and down, the fork 31 is inserted below the load, and the load is loaded on the fork 31. The auxiliary mast slides up and down relative to the mast 33 by a lift cylinder (hydraulic pressure) not shown.

2 to 5 show a head guard according to an embodiment of the present invention. 6 is a figure for demonstrating the structure of the roof shown in FIG.

As shown in FIG. 2, the head guard 4 according to an embodiment of the present invention is configured to include a roof 5 and four columns 6 that support the roof 5. The roof 5 is made by processing a standardized steel plate (for example, a steel plate having a thickness of 4.5 mm) into a material, and as shown in FIG. 6A, a flat and uniform plate-like body 50 is used as a base material. Do.

As shown in FIG. 6A, the plate-like body 50 includes a region 50A to be the top plate 51, a region 50B to be the side plate 52, a region 50C to be the front plate 53, and a region 50D to be the back plate 54. Have.
The area 50A to be the top plate portion 51 is rectangular in plan view, and is provided at the center of the plate-like body 50. In the region 50A to be the top plate portion 51, a small window 51A is provided on one side in the longitudinal direction, and a large window 51B is provided on the other side. Then, one side provided with the small window 51A is the front side, and the other side provided with the large window 51B is the rear side. In addition, the front-rear width of the small window 51A is set to be narrower than 150 mm so that a large load does not fall to the driver's seat.

The regions 50B to be the side plate portions 52 are provided on both side edge portions of the plate-like body 50 along the longitudinal direction of the region 50A to be the top plate portion 51, and form a left-right pair. Further, as shown in FIG. 6B, the region 50B to be the side plate portion 52 is bent at a right angle to the upper surface of the region 50A to be the top plate portion 51 to become the side plate portion 52. As shown to Fig.6 (a), 50 C of area | regions used as the front-plate part 53 are provided in the front edge part of the plate-shaped body 50 along the transversal direction of 50 A of area | regions used as the top-plate part 51. Further, as shown in FIG. 6B, the region 50C to be the front plate portion 53 is bent in the same direction as the side plate portion 52 to become the front plate portion 53. Then, the front edge of the side plate portion 52 and the side edge of the front plate portion 53 are welded, and the side plate portion 52 and the front plate portion 53 are joined. As shown in FIG. 6A, the region 50D to be the back plate portion 54 is provided at the rear edge portion of the plate-like body 50 along the short direction of the region 50A to be the top plate portion 51. Further, as shown in FIG. 6B, the area to be the back plate 54 is bent at a right angle to the upper surface of the area 50A to be the top plate 51 in the same direction as the side plate 52. It becomes the part 54. Then, the rear edge of the side plate portion 52 and the side edge of the rear plate portion 54 are welded, and the side plate portion 52 and the rear plate portion 54 are joined. Thus, the area 50A to be the top plate 51 is determined. As described above, by forming the roof 5 with the sheet metal bending and welding configuration of one material, it is possible to reduce the material cost and the welding cost while maintaining a sufficient strength.

Further, as shown in FIG. 2, the roof 5 includes a first reinforcing portion 55 and a second reinforcing portion 56. The first reinforcing portion 55 mutually connects the pair of left and right side plate portions 52, and as shown in FIG. 6C, a front portion which is a boundary between the small window 51A of the top plate portion 51 and the large window 51B. It is provided on the top. As shown in FIG. 5, the first reinforcing portion 55 is obtained by bending an elongated rectangular steel plate into a groove (U-shaped), and both opening edges are joined to the upper surface of the top plate portion 51. . Therefore, the U-shaped reinforcing portion 55 and the top plate portion 51 form a member having the same shape as the hollow pipe. Similar to the first reinforcing portion 55, the second reinforcing portion 56 connects the pair of left and right side plate portions 52 to each other, and is provided on the rear upper surface of the top plate portion 51. The second reinforcing portion 56 is an elongated rectangular steel plate bent at a right angle along the longitudinal direction to form an L shape, and an end portion forming one side is joined at a right angle to the upper surface of the top plate portion 51 End portions forming the sides are joined at right angles to the rear plate portion 54. Therefore, the L-shaped reinforcing portion 56, the top plate portion 51, and the rear plate portion 54 form a member having the same shape as the hollow pipe. It is preferable that the 1st reinforcement part 55 and the 2nd reinforcement part 56 use the standardized steel plate of the same thickness as the plate-shaped body 50 mentioned above. As a result, materials can be standardized, and material ordering costs and inventory costs can be reduced.

Further, as shown in FIGS. 2 to 5, a crosspiece 57 is provided between the first reinforcement 55 and the second reinforcement 56. The cross bar portion 57 is for preventing the dropped cargo from falling into the driver's seat, and in order to ensure the safety of the operator, a plurality of large windows 51B provided on the top plate portion 51 at a predetermined interval are provided. It is separated. The defined distance is 150 mm, and packages having a size of more than 150 mm are blocked by the crosspieces 57. As shown in FIG. 5, the crosspiece 57 is formed of a plate-like member having a thickness of 9 mm and formed in an arc shape which is convex upward. The cross bar portion 57 is disposed at a right angle to the upper surface of the top plate portion 51. The bar 57 is cut out of, for example, a 9 mm thick steel plate standardized using a laser.

FIG. 7 is a view showing a roof and a post joined to the roof, and FIG. 8 is an enlarged view of a portion A shown in FIG. Moreover, FIG. 9 is a figure explaining adjustment of the attachment length of a support | pillar.
Further, as shown in FIG. 7, the roof 5 is provided with a reinforcing plate 58 on the lower surface. The reinforcing plate 58 is for reinforcing the top plate portion 51 and positioning the columns 6, and is joined to the lower surface of the front edge and the lower surface of the rear edge of the top plate portion 51. The reinforcing plate 58 is an elongated plate-like member having a flat and uniform thickness, and is made of a standardized steel plate having the same thickness as the plate-like body 50 described above. Further, as shown in FIG. 8, the reinforcing plate 58 is provided with a positioning hole 581 at the end. The positioning hole 581 is for positioning the support 6 and is a rectangular elongated in the front-rear direction, and is formed to fit the support 6.

Further, as shown in FIG. 8, the roof 5 is provided with

guide plates

59A, 59B on the lower surface of the reinforcing plate 58.

Guide plates

59A and 59B are for supporting the side surfaces of the support 6, and are provided along the two outer sides of the positioning hole 581. The

guide plates

59A and 59B are plate-like members having a flat and uniform thickness formed in a substantially trapezoidal shape, and made of a standardized steel plate having the same thickness as the plate-like body 50 described above . The

guide plates

59A and 59B are welded and fixed to the reinforcing plate 58.

The support 6 is for supporting the roof 5 and is formed of a square tube having a rectangular cross section. The square tube is constituted of, for example, a standardized square pipe of 60 mm × 40 mm and 2 mm in thickness.

Further, the support 6 is positioned by being fitted into the positioning hole 581, and as shown in FIG. 9, the length of the support 6 is adjusted by the degree of fitting. That is, at least one support 6 is attached with a gap ΔX between the lower surface of the top plate portion 51 and the upper end surface of the support 6, and the length of the support 6 is adjusted within the thickness range of the reinforcing plate 58. . The support 6 is first fixed to the vehicle body side, but this may cause differences in length and angle between the plurality of support 6 and processing errors in the upper end surface of the support 6 attached to the roof 5. Thereby, welding distortion and processing error of the roof 5 are absorbed. Therefore, it is easy to adjust the pipe position at the time of welding, and welding distortion does not easily occur. In the above-described example, the length of the support 6 can be adjusted within the range of up to 4.5 mm (the thickness of the reinforcing plate), and welding distortion and processing errors occurring in ordinary production are absorbed. The support 6 is welded to the

guide plates

59A and 59B and fixed to the roof 5.

In the head guard 4 according to the embodiment of the present invention described above, since the roof 5 is configured by the plate-like body 50, the number of bonding points may be small. Further, the number of members constituting the roof 5 can be reduced. Therefore, joining operation such as welding operation can be reduced, and the cost required for the joining operation can be reduced. This makes it possible to reduce the manufacturing cost of the head guard 4 according to the embodiment of the present invention.

In addition, the roof 5 is provided on the front upper surface of the top plate portion 51, and is provided on the first upper surface of the rear portion of the top plate portion 51, and connects the left and right side plate portions 52 to each other. And the second reinforcing portion 56 connecting the side plate portions 52 to each other, so that a high strength pipe-like member can be formed by the plate-like member, so that the strength of the roof 5 can be secured. .

In addition, since the roof 5 has the small window 51A and the large window 51B in the top plate portion 51, the operator can visually recognize the luggage lifted by the luggage lifting device 3 through the small window 51A and the large window 51B. Further, since the crosspiece 57 installed between the first reinforcing part 55 and the second reinforcing part 56 divides the large window 51B into a plurality at a predetermined interval, the predetermined interval is obtained even if the load is broken. A package having a size larger than the size is blocked by the crosspiece 57. This ensures the safety of the operator. Moreover, since the crosspieces are formed in an arc shape which is convex upward, the strength is improved.

Further, the roof 5 is joined to the lower surface of the top plate portion 51, and a reinforcing plate 58 provided with a rectangular positioning hole 581 in which the column 6 is fitted and a guide to which the side surface of the column 6 fitted in the positioning hole 581 is joined Since the

plates

59A and 59B are provided, positioning of the support 6 is easy, and the bonding strength is high. In addition, since the mounting length of the column 6 can be adjusted by the degree of fitting into the positioning hole 581, welding distortion and processing errors that occur in normal manufacturing can be absorbed.

10 to 13 show a head guard according to an embodiment of the present invention. FIG. 14 is a view for explaining the production procedure of the roof shown in FIG.

As shown in FIG. 10, a head guard 104 according to an embodiment of the present invention is configured to include a roof 105 and four columns 106 for supporting the roof 105. The roof 105 is formed by processing a standardized steel plate (for example, a steel plate having a thickness of 4.5 mm) into a material, and uses a flat and uniform plate-like body 150 as a base material as shown in FIG.

As shown in FIG. 14A, the plate-like member 150 has a region 150A to be the top plate portion 151, a region 150B to be the side plate portion 152, a region 150C to be the front plate portion 153, and a region 150D to be the rear plate portion 154. Have.
The area 150A to be the top plate portion 151 is rectangular in a plan view, and is provided at the center of the plate-like body 150. In the region 150A to be the top plate portion 151, a large window 151A is provided on one side in the longitudinal direction, and three small windows 151B are provided on the other side. Then, one side provided with the large window 151A is the front side, and the other side provided with three small windows 151B is the rear side. The left and right width of the small window 151B is set to be smaller than 150 mm so that a large luggage will not fall to the driver's seat.

The regions 150B to be the side plate portions 152 are provided on both side edge portions of the plate-like body 150 along the longitudinal direction of the region 150A to be the top plate portion 151, and form a left-right pair. Further, as shown in FIG. 14B, the region to be the side plate portion 152 is bent at a right angle to the upper surface of the region 150A to be the top plate portion 151 to become the side plate portion 152. As shown in FIG. 14A, the region 150C to be the front plate portion 153 is provided at the front edge portion of the plate-like body 150 along the short direction of the region 150A to be the top plate portion 151. Further, as shown in FIG. 14B, the region 150C to be the front plate portion 153 is bent in the same direction as the side plate portion 152 to become the front plate portion 153. Then, the front edge of the side plate portion 152 and the side edge of the front plate portion 153 are welded, and the side plate portion 152 and the front plate portion 153 are joined. As shown in FIG. 14A, the region 150D to be the back plate portion 154 is provided at the rear edge portion of the plate-like body 150 along the short direction of the region 150A to be the top plate portion 151. Further, as shown in FIG. 14B, the region 150D to be the back plate portion 154 is bent at a right angle to the upper surface of the region 150A to be the top plate portion 151 in the same direction as the side plate portion 152. It becomes the board part 154. Then, the rear edge of the side plate portion 152 and the side edge of the rear plate portion 154 are welded, and the side plate portion 152 and the rear plate portion 154 are joined. Thereby, the area 150A to be the top plate portion 151 is determined. As described above, by forming the roof 5 with the sheet metal bending and welding configuration of one material, it is possible to reduce the material cost and the welding cost while maintaining a sufficient strength.

Moreover, as shown in FIG. 10, the roof 105 is provided with the 1st reinforcement part 155. As shown in FIG. The first reinforcing portion 155 connects the pair of left and right side plate portions 152 to each other, and is provided in a region serving as a boundary between the large window 151A of the top plate portion 151 and the small window 151B. As shown in FIG. 12, the first reinforcing portion 155 is a plate-like member having the same thickness as the plate-like body 150 and the same height as the side plate portion 152, and is perpendicular to the top surface of the top plate 151. The lower surface is joined to the upper surface of the top plate 151.

In addition, the roof 105 is provided with a first cross section 156. The first cross-piece 156 connects the back plate 154 and the first reinforcing part 155 to each other, and is provided in a region serving as a boundary between the small window 151B and the small window 151B. As shown in FIG. 11, the first crosspiece 156 is a plate-like member having the same thickness as the plate 150 and the same height as the rear plate 154, and is perpendicular to the top surface of the top plate 151. The lower surface is joined to the upper surface of the top plate 151.

As shown in FIGS. 10 to 13, a second rail portion 157 is provided between the front plate portion 153 and the first reinforcing portion 155. The second crosspieces 157 are for preventing dropped cargo from falling into the driver's seat, and the large windows 151A provided on the top plate 151 at predetermined intervals in order to secure the safety of the operator. Is divided into multiple. The defined distance is 150 mm, and packages with a size of more than 150 mm are blocked by the second rungs 157. The second bar portion 157 is formed of a plate-like member having the same thickness as the plate-like body 150. The second beam portion 157 is disposed at a right angle to the upper surface of the top plate 151.

FIG. 15 is a view showing a roof and a post joined to the roof, and FIG. 16 is an enlarged view of a portion B shown in FIG. Moreover, FIG. 17 is a figure explaining adjustment of the attachment length of a support | pillar.
Moreover, as shown in FIG. 15, the roof 105 is equipped with the reinforcement board 158 in the lower surface. The reinforcing plate 158 is for reinforcing the top plate portion 151 and positioning the columns 106, and is joined to the lower surface of the front edge and the lower surface of the rear edge of the top plate portion 151. The reinforcing plate 158 is an elongated plate-like member having a flat and uniform thickness, and is made of a standardized steel plate having the same thickness as the plate-like body 150 described above. Further, as shown in FIG. 16, the reinforcing plate 158 is provided with positioning holes 1581 at its end. The positioning hole 1581 is for positioning the support column 106, is a rectangular shape elongated in the front-rear direction, and is formed to fit the support column 106.

Further, as shown in FIG. 16, the roof 105 is provided with

guide plates

159A and 159B on the lower surface of the reinforcing plate 158.

Guide plates

159A and 159B are for supporting the side surfaces of the support 6, and are provided along the two outer sides of the positioning hole 1581. The

guide plates

159A and 159B are flat trapezoidal flat plate members having a uniform thickness, and made of a standardized steel plate having the same thickness as that of the above-described plate member 150. . The

guide plates

159A and 159B are welded and fixed to the reinforcing plate 158.

The support 106 is for supporting the roof 105, and is formed of a square tube having a rectangular cross section. The square tube is constituted of, for example, a standardized square pipe of 60 mm × 40 mm and 2 mm in thickness.

Further, the support column 106 is positioned by being fitted into the positioning hole 1581, and as shown in FIG. 17, the length of the support column 106 is adjusted according to the degree of fitting. That is, at least one support 106 is attached with a gap ΔX between the lower surface and the upper end surface of the top plate 151, and the length of the support 106 is adjusted in the range of the thickness of the reinforcing plate 58. Thereby, welding distortion and processing error of the roof 105 are absorbed. In the example described above, the length of the support column 106 can be adjusted within the range of up to 4.5 mm (the thickness of the reinforcing plate), and the welding distortion and processing error that occur in normal manufacture are absorbed. The columns 106 are welded to the

guide plates

159A and 159B and fixed to the roof 105.

In the head guard 104 according to the embodiment of the present invention described above, since the roof 105 is formed of the flat plate 150 having a flat and uniform thickness, the number of bonding points can be reduced. Therefore, joining operation such as welding operation can be reduced, and the cost required for the joining operation can be reduced. This makes it possible to reduce the manufacturing cost of the head guard 104 according to the embodiment of the present invention.

Further, since the roof 105 of the head guard 104 can be manufactured from a standardized steel plate of the same thickness, it is possible to reduce the cost of ordering materials and the cost of inventory.

Further, the roof 105 is provided on the upper surface of the top plate portion 151 at the center, and is provided on the upper surface of the rear portion of the top plate portion 151 and the reinforcing portion 155 connecting the left and right side plate portions 52 to each other. The roof 105 is rigid because it has the first crosspieces 156 that interconnect the reinforcements 155.

Further, since the roof 105 has the large window 151A in the top plate portion 151, the operator can visually recognize the load lifted by the load lifting device 3 through the large window 151A. In addition, since the second crosspiece 157 installed between the front plate 153 and the first reinforcing part 155 divides the large window 151A into a plurality at a predetermined interval, it is predetermined even if the load is broken. Loads exceeding the interval are blocked by the crosspieces 157. This ensures the safety of the operator.

Further, the roof 105 is joined to the lower surface of the top plate portion 151, and a reinforcing plate 158 provided with a rectangular positioning hole 1581 into which the column 106 fits, and a guide to which the side surface of the column 106 fitted into the positioning hole 1581 is joined. Since the

plates

159A and 159B are provided, positioning of the support column 106 is easy and bonding strength is high. Further, since the mounting length of the support column 106 can be adjusted by the degree of fitting into the positioning hole 1581, welding distortion and processing errors that occur in normal manufacturing can be absorbed.

The head guard of the forklift according to at least one embodiment of the present invention is suitable for the head guard of the forklift because the welding operation can be reduced and the manufacturing cost can be reduced.

DESCRIPTION OF SYMBOLS 1 forklift 2 vehicle body 4 head guard 5 roof 50 plate-like body 50A region 50B top plate portion 50C side plate portion 50C front plate portion 50D rear plate portion 51 top plate 51A small window 51B large window 52 side plate portion 53 front plate portion 54 back plate portion 55 first reinforcing portion 56 second reinforcing portion 57 cross portion 58 reinforcing plate 581

positioning hole

59A, 59B guide plate 6 post 104 head guard 105 roof 106 post 150 plate member 150A area to be a top plate area 150B area to be a side plate portion 150C area to be a front plate portion 150D area to be a backplate portion 151 top plate portion 151A large window 151B small window 152 side plate portion 153 front plate portion 154 rear plate portion 155 reinforcement Part 156 First crosspiece 157 Second crosspiece 158 Reinforcement 1581

positioning holes

159A, 159B guide plate

Claims

A plan view rectangular top plate provided at the center of the plate-like body;
A pair of left and right side plate portions provided adjacent to the top plate portion at both side edges of the plate-like body and bent at a right angle to the upper surface of the top plate portion;
A front plate portion provided adjacent to the top plate portion at a front edge portion of the plate-like body, and bent to an upper surface of the top plate portion and joined to the side plate portion;
A rear plate portion provided adjacent to the top plate portion at the rear edge portion of the plate-like body, bent at a right angle to the upper surface of the top plate portion, and joined to the side plate portion;
A head guard for a forklift comprising: a roof having:
The roof is
A first reinforcing portion provided on a front upper surface of the top plate portion to form a pipe shape by being joined to the top plate portion, and connecting the left and right side plate portions to each other;
A second reinforcing portion provided on a rear upper surface of the top plate portion, having a pipe shape by being joined to the top plate portion, and connecting the left and right side plate portions to each other;
The head guard of the forklift according to claim 1, characterized in that:
The first reinforcing portion is formed by bending a long rectangular steel plate into a groove, and both opening edges of the groove are joined to the upper surface of the top plate to form a pipe shape. The head guard of the forklift according to claim 2, characterized in that.
The second reinforcing portion is formed in an L shape obtained by bending a long rectangular steel plate along a longitudinal direction at a right angle, and one end of the L shape is joined at a right angle to the upper surface of the top plate portion The head guard of the forklift according to claim 2 or 3, wherein the other end of the L-shape is joined at a right angle to the rear plate portion to form a pipe shape. .
The roof is
5. The head guard of a forklift according to any one of claims 2 to 4, further comprising a crosspiece installed between the first reinforcement and the second reinforcement.
The crosspiece is
The head guard of a forklift according to claim 5, wherein the head guard is formed in an arc shape which is convex upward.
It has a post for fixing the roof to the body of a forklift,
The roof is
A reinforcing plate joined to the lower surface of the top plate portion and provided with a rectangular positioning hole into which the column is fitted;
A guide plate provided along the positioning hole and to which a side surface portion of a column fitted in the positioning hole is joined;
The head guard for a forklift according to any one of claims 1 to 6, further comprising:
The head guard of a forklift according to claim 7, wherein the support is fixed by opening a gap between the lower surface of the top plate portion and the upper end surface of the support.