JP2005306066A - Transparent plate mounting structure of construction machine and driver's cab of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent plate mounting structure of a construction machine for preventing the visual field from a driver's cab from being narrowed and the driver's cab of the construction machine. <P>SOLUTION: A rubber plate 111, a sealing member 114, a glass plate 101 and a pressing plate 131 adhered with a rubber plate 112 are mounted on a glass mounting surface 102 in this order. A rubber plate 113 is arranged to be inscribed in an inner peripheral part of a screw seat 121. The pressing plate 131 is fixed to an abutting surface 122 of the screw seat 121 by using a bolt 133. A height H from the glass mounting surface 102 to the abutting surface 122 is shorter than total of thickness t1, t2 and tg of each of the rubber plates 111 and 112 and the glass plate 101. The rubber plates 111 and 112 therefore are pressed between the glass mounting surface 102 and the pressing plate 131 to be bent in thickness directions when the pressing plate 131 is fixed to be closely adhered to the abutting surface 122. As a result, the glass plate 101 is fixed since the outer peripheral vicinity is held over the entire periphery by elastic force of the rubber plates 111 and 112. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transparent plate mounting structure for a construction machine.

  In order to fix the window glass to the opening part of the cab of the construction machine, it is known to use H-type rubber having a substantially H-shaped cross section (see Patent Document 1).

JP-A-11-254971

  In order to fix the window glass using the H-type rubber, the edge of the opening end and one groove portion of the H-type rubber are fitted, and the peripheral end portion of the window glass and the other groove portion of the H-type rubber are connected. Must be mated. Therefore, since the edge of the opening end for fitting into the groove portion of the H-shaped rubber and the H-shaped rubber project inward of the opening, the view from the cab is narrowed.

(1) The transparent plate mounting structure for a construction machine according to the invention of claim 1 is a transparent plate mounting structure for fixing a transparent plate to the opening of the cab of the construction machine, and is transparent on the outer surface of the construction machine around the outside of the opening. First and second elastic members sandwiching the inner and outer surfaces of the peripheral edge of the plate and elastically supporting the transparent plate on the outer surface, and the first and second transparent plates are disposed along the outer surface. A pressing member that is fixed to the outer surface via an elastic member, and an attachment member that fixes the pressing member to the outer surface outside the periphery of the transparent plate are provided.
(2) According to a second aspect of the present invention, in the transparent plate mounting structure for a construction machine according to the first aspect, the mounting member abuts against the pressing member to define a distance between the outer surface and the pressing member. It has a contact surface.
(3) The invention according to claim 3 is the transparent plate mounting structure for a construction machine according to claim 1 or 2, and is provided between the outer surface and the pressing member so as to face the peripheral end of the transparent plate. The third elastic body is further provided.
(4) The invention of claim 4 is the transparent plate mounting structure for a construction machine according to any one of claims 1 to 3, wherein the opening is rectangular and the pressing member is substantially the same as each side of the opening. It is characterized by four plate members having a length.
(5) The invention of claim 5 is the transparent plate mounting structure for a construction machine according to any one of claims 1 to 3, wherein the pressing member is a member formed integrally in advance. To do.
(6) The invention according to claim 6 is the transparent plate mounting structure for a construction machine according to any one of claims 1 to 5, wherein the transparent plate before being fixed to the outer surface is attached to the mounting member so as not to fall. And a receiving member that supports the lower portion of the transparent plate.
(7) According to a seventh aspect of the present invention, in the transparent plate mounting structure for a construction machine according to any one of the first to sixth aspects, on the outer side of the first elastic member in contact with the outer surface, the transparent plate and the outer surface And a sealing member for sealing between the two.
(8) A cab of a construction machine according to the invention of claim 8 is provided with the transparent plate mounting structure for a construction machine according to any one of claims 1 to 7.

  According to the present invention, the transparent plate is sandwiched between the first and second elastic bodies and fixed to the outer surface. Thereby, since a transparent board can be fixed without using H type rubber, the field of view from an opening can be expanded and safety and convenience can be improved.

  An embodiment in which a transparent plate mounting structure for a construction machine according to the present invention is applied to a hydraulic excavator will be described. FIG. 1 is a diagram illustrating an appearance of a hydraulic excavator. The hydraulic excavator 10 includes a traveling body 1 and a revolving body 2 provided on the traveling body 1 so as to be able to swivel. The swing body 2 includes an operator cab 3 provided in front of the upper portion of the swing body 2, an engine chamber 4 provided from the center to the rear side of the swing body 2, and a counter attached to the lower rear of the engine chamber 4. A weight 5 and a multi-joint type front device 6 including a boom 11, an arm 12, and a bucket 13 that are attached to the front of the revolving structure 2 are provided.

  The traveling body 1 includes a pair of left and right crawler belts 1a, and the crawler belts 1a are driven by a travel motor 1b. The turning body 2 is turned with respect to the traveling body 1 by a turning motor (not shown) provided at the center thereof. The boom 11, the arm 12, and the bucket 13 are rotated by the expansion and contraction of the boom cylinder 14, the arm cylinder 15, and the bucket cylinder 16, respectively. Each of these motors and each cylinder is driven by pressure oil from a hydraulic pump (not shown) provided in the engine chamber 4.

  As shown in FIGS. 2A and 2B, the cab 3 includes a front surface 31 that is inclined so that the upper side is positioned forward of the bottom side, and a side surface 32 that is substantially vertical. A front window 100 and a side window 20 for visually confirming the front and side of the excavator 10 are provided on the front surface 31 and the side surface 32. The front window 100 is a rectangular window provided over substantially the entire front surface 31, and the glass plate 101 is pressed and fixed in the thickness direction against the front surface 31 that is substantially entirely open. The structure of the front window 100 will be described in detail later.

  The side window 20 is a window provided on the side surface 32 and includes an H-shaped rubber 21 and a glass plate 22. The H-type rubber 21 is an annular member provided with grooves on the outer periphery and the inner periphery so that the cross-section thereof is substantially H-shaped. The groove of the outer periphery of the H-type rubber 21 and the edge of the opening portion of the side surface 32 are fitted, and the groove of the inner periphery and the peripheral end of the glass plate 22 are fitted, whereby the H-type rubber 21 is The glass plate 22 is fixed to the surface. In order to fix the glass plate 22, it is necessary to first fit the H-type rubber 21 to the edge of the opening portion of the side surface 32. Thereafter, the glass plate 22 is fitted into the groove on the inner periphery of the H-shaped rubber 21 fitted in the opening portion of the side surface 32, and the glass plate 22 is fixed to the side surface 32.

--- Structure of front window 100 ---
FIGS. 3 and 4 are views showing the III-III cross section and the IV-IV cross section of FIG. FIG. 5 is a cross-sectional view of the vicinity of the pillar 33 before the glass plate 101 is attached, viewed from the same position as the cross-sectional view shown in FIG. Pillars 33 are provided in the vicinity of the left and right ends of the front surface 31 of the cab 3. Reference numeral 36 denotes a weld bead. An upper beam 34 and a lower frame front end portion 35 are provided in the vicinity of the upper portion and the lower portion of the front surface 31. The glass mounting surface 102 is a surface (outer surface) provided in front of the pillar 33, the upper beam 34, and the lower frame front end portion 35 so as to surround the outer periphery of the rectangular opening 103 with a certain width. Exists in the plane.

  As shown in FIGS. 3 and 5, a screw seat 121 is provided in the vicinity of the outer periphery of the glass mounting surface 102 having a rectangular shape. The screw seat 121 is a member provided on the glass mounting surface 102 so as to surround the outside from the opening 103 by a predetermined distance, and surrounds the glass mounting surface 102 in an arch shape having a square cross section. The contact surface 122 of the screw seat 121 is a surface parallel to the glass mounting surface 102 and is separated from the glass mounting surface 102 by a predetermined distance H. Therefore, the contact surface 122 exists in the same plane parallel to the glass mounting surface 102. A plurality of holes 123 are provided in the contact surface 122. A nut 124 is fixed inside the screw seat 121 that corresponds to the back surface of the contact surface 122 and coincides with the hole 123 when viewed from the front. A bolt 133 for fixing a presser plate 131 described later is screwed into the nut 124.

  The holding plate 131 is a plate-like member having a shape obtained by dividing a rectangular plate-like member having an opening substantially coincident with the opening 103 at the four corners of the rectangle. The holding plate 131 is provided with a plurality of holes 132. The holes 132 are provided so as to coincide with the holes 123 provided in the screw seat 121 when the glass plate 101 is fixed as will be described later.

  The glass plate 101 is a rectangular transparent plate having a size larger than that of the rectangular opening 103 and smaller than the size of the inner peripheral portion of the screw seat 121. The glass plate 101 is pressed and sandwiched between the glass mounting surface 102 and the pressing plate 131 via rubber plates 111 and 112 described later. The thickness of the glass plate 101 is tg.

  The rubber plates 111 and 112 are rectangular plate-shaped elastic members that have openings that substantially coincide with the openings 103 and that have uniform thicknesses t1 and t2, respectively. As described above, the rubber plates 111 and 112 are members for elastically holding the periphery of the glass plate 101 between the glass attachment surface 102 and the pressing plate 131. Therefore, the rubber plates 111 and 112 have an appropriate hardness that can sandwich the glass plate 101. Note that the thickness t1 of the rubber plate 111 and the thickness t2 of the rubber plate 112 are not necessarily the same, and may be different from each other.

  The rubber plate 113 is a belt-like elastic member that is inscribed in the inner peripheral portion of the screw seat 121, and prevents the peripheral end portion of the glass plate 101 from coming into direct contact with the screw seat 121. The sealing material 114 is a soft rubber linear member having a substantially circular cross section, and its diameter is larger than the thickness t 1 of the rubber plate 111. The sealing material 114 is softer than the rubber plates 111 and 112 and can be easily deformed in the diameter direction. The sealing material 114 is disposed between the glass plate 101 and the glass mounting surface 102 and plays a role as a seal that prevents rainwater and the like from entering the cab 3.

--- How to attach glass plate 101 ---
The glass plate 101 is attached to the front window 100 on the glass attachment surface 102 as follows. First, as shown in FIG. 5, the rubber plate 111 and the sealing material 114 are temporarily bonded to the glass mounting surface 102 with an adhesive or the like, as shown in FIG. The rubber plate 113 is temporarily fixed with an adhesive or the like so as to be inscribed in the inner peripheral portion of the screw seat 121.

  Next, as shown in FIG. 8, the glass plate 101 is placed on the upper surface of the screw seat 121 provided in front of the lower frame front end portion 35 via the rubber plate 113. Thereby, the weight of the glass plate 101 can be supported by the screw seat 121. The glass plate 101 is supported so as not to fall forward (FIGS. 7 and 8). The position of the glass plate 101 at this time is a fixed position.

  As shown in FIG. 9, the front surface of the glass plate 101 placed at the fixing position is pressed by a pressing plate 131 to which a rubber plate 112 is attached, and the pressing plate 131 is fixed to the contact surface 122 using a bolt 133. To do. Here, the height between the glass mounting surface 102 and the contact surface 122 is H, but this height H is the thickness t1, t2, tg of the rubber plates 111, 112 and the glass plate 101, respectively. It is comprised so that it may become smaller than the sum total. Therefore, as shown in FIG. 3, when the pressing plate 131 is fixed so as to be in close contact with the contact surface 122, the rubber plates 111 and 112 are pressed between the glass mounting surface 102 and the pressing plate 131 to increase the thickness. Deflection in the vertical direction. Thereby, the glass plate 101 is clamped and fixed by the elastic force of the rubber plates 111 and 112 over the entire periphery in the vicinity of the outer periphery. That is, the movement of the glass plate 101 in the thickness direction is elastically restricted by the surface pressure in the thickness direction received from the rubber plates 111 and 112. Further, the movement in the direction parallel to the surface of the glass plate 101 is elastically restricted by the frictional force between the glass plate 101 and the rubber plates 111 and 112. Further, the movement in the direction parallel to the surface of the glass plate 101 is also elastically restricted by the rubber plate 113 inscribed in the inner peripheral portion of the screw seat 121.

  FIGS. 10A and 10B show a comparison between a conventional window frame structure using H-shaped rubber and the transparent plate mounting structure of the present embodiment. As shown in FIG. 10A, in order to fix the glass plate 301 with the H-type rubber 311, the groove 311a on the outer peripheral side of the H-type rubber 311 is fitted to the opening 303 of the front surface 31. Therefore, it is necessary to make the opening 303 protrude inward from the opening 103 of the present embodiment by the amount of the fitting portion D1. Further, the inner end 311b of the H-shaped rubber 311 fitted in the opening 303 further protrudes inward from the opening 303 by a distance D2 to block the view. On the other hand, in the transparent plate mounting structure of the present embodiment, the visible part can be enlarged as compared with the conventional window frame structure, and the enlarged width is D = D1 + D2 per side. Therefore, the expansion width of the visible part in the left-right direction and the up-down direction is 2D. In addition, the fixing order of the glass plate 301 in the conventional window frame structure is the same as the case of the side window 20 mentioned above.

The above-described transparent plate mounting structure for a construction machine has the following effects.
(1) The glass plate 101 is sandwiched and fixed in the thickness direction by the rubber plates 111 and 112. Thereby, since the glass plate 101 can be fixed without using H-type rubber, the visual field of the transparent plate mounting structure can be enlarged and the field of view can be enlarged as described above, and safety and convenience can be improved.

(2) Since no H-shaped rubber is used, when looking forward from the cab 3, the H-shaped rubber is not visible and looks good.

(3) In the conventional window frame structure using the H-shaped rubber 311, the glass plate 301 can be attached to the H-shaped rubber 311 fitted into the opening 303, so that the strength of the H-shaped rubber 311 must be lowered. I don't get it. Further, the glass plate 301 is held in the opening 303 by the strength of the H-type rubber 311 itself. In contrast, in the transparent plate mounting structure of the present embodiment, the peripheral edge of the glass plate 101 is elastically sandwiched between the glass mounting surface 102 and the pressing plate 131 via the rubber plates 111 and 112. The fixing strength of 101 mainly depends on the strength of the glass mounting surface 102 and the pressing plate 131. Moreover, since the pressure receiving areas of the rubber plates 111 to 113 that are in contact with the glass plate can be increased, the stress applied to the rubber plates 111 to 113 can be reduced. For this reason, in the transparent plate mounting structure of the present embodiment, the fixing strength of the glass plate 101 can be increased more easily than the conventional window frame structure. Therefore, even a large glass plate can be reliably fixed, which can contribute to an increase in the size of the construction machine.

(4) As described above, since the transparent plate mounting structure of the present embodiment can increase the fixing strength of the glass plate 101 as compared with the conventional window frame structure, vibration of the glass plate 101 can be efficiently suppressed. For this reason, since the noise level and vibration level of the cab 3 can be reduced, the cab can be made comfortable.

(5) In the conventional window frame structure using the H-shaped rubber 311, the glass plate 301 is attached to the opening 303 into which the H-shaped rubber 311 is fitted. The operation of fitting the glass plate 301 into the groove becomes very difficult. On the other hand, in the transparent plate mounting structure of the present embodiment, the rubber plates 111 to 113 are temporarily fixed and the upper surface of the screw seat 121 provided in front of the lower frame front end portion 35 as shown in FIG. Since the weight of the glass plate 101 can be supported by placing the glass plate 101 via the rubber plate 113, even a large glass plate can be easily attached. Accordingly, it is easy to increase the size of the transparent plate mounting structure in terms of assembly, and it is possible to easily cope with the increase in size of the construction machine.

(6) In the conventional window frame structure, the thickness of the glass plate that can be sandwiched in the groove is limited due to the structure of the H-type rubber 311. In contrast, in the transparent plate mounting structure of the present embodiment, the thickness of the glass plate can be easily coped with by changing the height of the contact surface 122 of the screw seat 121. For example, it is possible to attach a multi-layer glass such as a bulletproof glass having an increased strength against flying objects.

---- Modified example ---
(1) In the above description, the size of the opening portion inside the pressing plate 131 fixed to the rubber plate 112 and the screw seat 121 is substantially equal to the size of the opening 103, but the present invention is not limited to this. For example, as shown in FIG. 11, the opening portion inside the pressing plate 231 fixed to the rubber plate 212 and the screw seat 121 is cut obliquely so as to spread outward when viewed toward the outside of the cab 3. The inclined surfaces 212a and 231a may be formed. By doing so, the field of view from the cab 3 can be further expanded.

(2) In the above description, the structure in front of the lower frame front end portion 35 is the same as the structure in the vicinity of the upper beam 34 and the pillar 33, but the present invention is not limited to this. For example, as shown in FIG. 12, a receiving portion 121a is provided on the upper portion of a screw seat 121 in front of the lower frame front end portion 35, and the lower portion of the glass plate 101 can be supported, so that the lower frame front end portion can be supported in the assembly process. The glass plate 101 may be prevented from slipping off from the screw seat 121 in front of 35. If the glass plate 101 can be prevented from moving horizontally from the screw seat 121 in front of the front end portion 35 of the lower frame and sliding down, the mounting position of the receiving portion 121a, the member to be mounted, the mounting method, etc. are as described above. It is not limited. Further, a plate member having the same function as that of the screw seat 121a is attached and fixed to the screw seat 121 before the glass plate 101 is attached. After the glass plate 101 is attached, the plate member is attached to the screw seat. You may remove from 121.

(3) In the above description, the pressing plate 131 is a plate-like member having a shape obtained by dividing a rectangular plate-like member having an opening substantially coincident with the opening 103 at the four corners of the rectangular shape. It is not limited. The division position and the number of divisions of the pressing plate 131 are not particularly limited. Further, the pressing plate 131 may be integrated.
(4) Although the sealing material 114 is provided in the above description, the present invention is not limited to this. For example, since the rubber plate 111 can have a sealing function depending on the shape and material of the rubber plate 111, the sealing material 114 can be omitted.

(5) In the above description, the rubber plates 111 and 112 are rectangular plate-like elastic members having an opening substantially coincident with the opening 103, that is, an integrally molded product, but the present invention is limited to this. Not. For example, a plate-like member having a predetermined length may be added as appropriate. Further, the rubber plate 113 may be an integrally molded ring-shaped member as long as it is a belt-like elastic member disposed on the inner peripheral portion of the screw seat 121, and the end of at least one or more belt-like members. The thing which connected the part may be sufficient. Further, it may be wound around the peripheral edge of the glass plate 101.

(6) In the above description, the sealing material 114 is disposed outside the rubber plate 111, but the present invention is not limited to this, and the sealing material 114 may be disposed inside the rubber plate 111. .
(7) In the above description, the front window 100 has a rectangular shape, but the present invention is not limited to this. It may be a polygon other than a rectangle, a shape such as a circle with no corners, or a combination of these.

(8) In the above description, the nut 124 is fixed to the screw seat 121 in advance, but may not be fixed if the pressing plate 131 can be easily bolted. The shape of the screw seat 121 is not limited to the above description as long as the pressing plate 131 to which a force directed toward the outer surface can be fixed at a predetermined position with respect to the outer surface. Further, instead of the bolt 133 and the nut 124, the pressing plate 131 may be attached to the screw seat 121 by another method such as a clamp or a so-called patched lock.
(9) You may combine each embodiment and modification which were mentioned above, respectively.

  In the above-described embodiment and its modifications, for example, the first and second elastic members are the rubber plate 111 and the rubber plate 112, the sealing member is the sealing material 114, the pressing member is the pressing plate 131, and the mounting member is The third elastic body corresponds to the screw seat 121, the rubber plate 113, and the receiving member to the receiving portion 121a. Furthermore, as long as the characteristic functions of the present invention are not impaired, the present invention is not limited to the device configuration in the above-described embodiment.

1 is an external view of a hydraulic excavator 10 to which a transparent plate mounting structure for a construction machine according to the present invention is applied. It is a figure which shows the external appearance of the cab 3, (a) is a side view, (b) is a front view. It is III-III sectional drawing of FIG.2 (b). It is IV-IV sectional drawing of FIG.2 (b). It is sectional drawing of the vicinity of the pillar 33 before attaching the glass plate 101 seen from the same position as sectional drawing shown in FIG. It is a figure which shows the procedure which attaches the glass plate 101 to the glass attachment surface 102. FIG. It is a figure which shows the procedure which attaches the glass plate 101 to the glass attachment surface 102. FIG. It is sectional drawing which looked at the procedure which attaches the glass plate 101 to the glass attachment surface 102 from the side surface. It is a figure which shows the procedure which attaches the glass plate 101 to the glass attachment surface 102. FIG. It is the figure which compared the conventional window frame structure which uses H-type rubber, and the transparent plate attachment structure of this Embodiment, (a) is a figure which shows the conventional window frame structure, (b) It is a figure which shows the transparent plate attachment structure of this Embodiment. It is a figure which shows a modification. It is a figure which shows a modification.

Explanation of symbols

3 cab 10 hydraulic excavator 20 side window 21, 311 H-type rubber 22, 101, 301 glass plate 31 front surface 32 side surface 33 pillar 34 upper beam 35 lower frame front end 100 front window 102 glass mounting surface (outer surface)
103, 303 Openings 111-113 Rubber plate 114 Sealing material 121 Screw seat 121a Receiving portion 122 Contact surface 124 Nut 131 Holding plate 133 Bolt

Claims (8)

In the transparent plate mounting structure that fixes the transparent plate to the opening of the cab of the construction machine,
First and second elastic members that sandwich the inner and outer surfaces of the peripheral edge of the transparent plate at the outer surface of the construction machine around the outside of the opening and elastically support the transparent plate on the outer surface;
A pressing member disposed along the outer surface and fixing the transparent plate to the outer surface via the first and second elastic members;
A transparent plate mounting structure for a construction machine, comprising: a mounting member that fixes the pressing member to the outer surface outside the periphery of the transparent plate. The transparent plate mounting structure for a construction machine according to claim 1,
The mounting plate has a contact surface that contacts the pressing member and defines a distance between the outer surface and the pressing member. In the transparent plate mounting structure for a construction machine according to claim 1 or 2,
A transparent plate mounting structure for a construction machine, further comprising a third elastic body provided between the outer surface and the pressing member so as to face the peripheral end of the transparent plate. In the transparent plate mounting structure for a construction machine according to any one of claims 1 to 3,
The opening is rectangular;
2. The transparent plate mounting structure for a construction machine, wherein the pressing member is four plate members having substantially the same length as each side of the opening. In the transparent plate mounting structure for a construction machine according to any one of claims 1 to 3,
The transparent plate mounting structure for a construction machine, wherein the pressing member is a member formed integrally in advance. In the transparent plate mounting structure for a construction machine according to any one of claims 1 to 5,
A transparent plate mounting structure for a construction machine, further comprising a receiving member that is attached to the mounting member so as not to drop the transparent plate before being fixed to the outer surface and supports a lower portion of the transparent plate. In the transparent plate mounting structure for a construction machine according to any one of claims 1 to 6,
A transparent plate mounting structure for a construction machine, further comprising a seal member that seals between the transparent plate and the outer surface outside the first elastic member in contact with the outer surface.   A cab for a construction machine comprising the transparent plate mounting structure for a construction machine according to any one of claims 1 to 7.

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