JP4364301B1 - Brake device for cargo handling vehicles - Google Patents

Abstract

The present invention provides a brake device for a cargo handling vehicle, which is a brake device capable of braking a wheel and provided with a wheel cover that covers the wheel from the rear.
A brake device 44 of a pallet truck 1 is attached to a part of the pallet truck 1 and protrudes rearward through a pair of left and right rear wheels 43, 43 of the pallet truck 1, and the rod 50 And a brake part 70 that is slidably fitted in the axial direction thereof and is press-contactable to the rear wheels 43 and 43, and is disposed in front of the brake part 70, and the direction in which the brake part 70 is separated from the rear wheels 43 and 43. The rod 50 is inserted through the spring 80 that is biased to the rear, the pedal portion 60 that is disposed behind the brake portion 70 and presses the brake portion 70 against the rear wheels 43 and 43 against the biasing force of the spring 80. It has a possible opening and is provided with a wheel cover 73 that is attached to the rear side of the brake unit 70 and covers the wheels 43 and 43 from the rear.
[Selection] Figure 6

Description

  The present invention relates to a technology of a brake device for a cargo handling vehicle.

  Conventionally, as a cargo handling vehicle used when a worker carries a load in a factory or a warehouse, a fork-shaped load platform is configured to be lifted and lowered by a ram cylinder provided behind the load carrying vehicle. A pallet truck or the like for running a vehicle by pushing and pulling a handle portion erected from a cylinder is known. Such a cargo handling vehicle is provided with a brake device (see, for example, Patent Document 1).

  In a brake device for a cargo handling vehicle (pallet truck) described in Patent Document 1, a rear axle support member that supports a rear wheel via an axle is provided at a lower portion of a ram cylinder, and a rod is directed rearward from the rear axle support member. Is projected. A spring, a brake part, and a pedal part are respectively fitted on the rod in order from the rear axle support member side. In the brake device having such a configuration, when an operator performs a braking operation by depressing the pedal portion, the pedal portion rotates about the axis on the rod, and a cam portion formed on the pedal portion. Presses the cam portion formed on the brake portion. Then, the brake portion slidably provided on the rod slides toward the rear axle support member side (the rear wheel side) against the urging force of the spring. As a result, the brake portion presses against the rear wheel and brakes the rear wheel. That is, the brake device can be a parking brake for a pallet truck.

  On the other hand, when the pallet truck is driven rearward by pulling the handle portion, a wheel cover may be provided because the rear wheel may hit an obstacle or the rear wheel may crush the obstacle. However, the specification for providing the wheel cover is to fix the wheel cover to the rear end of the rod protruding rearward in the same manner as the rod, so if the wheel cover is provided to the brake device, Thus, the operator cannot perform the braking operation. Therefore, the wheel cover cannot be provided on the brake device.

Japanese Utility Model Publication No. 56-11172

  The present invention has been made in view of the above-described problems, and a problem to be solved is a brake device capable of braking a wheel, which is provided with a wheel cover that covers the wheel from behind. A brake device for a vehicle is provided.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

According to a first aspect of the present invention, a rod that is attached to a part of the cargo handling vehicle and projects rearward through a pair of left and right wheels of the cargo handling vehicle, and is externally fitted to the rod so as to be slidable in the axial direction. A brake part that can be pressed against the wheel; a biasing part that is disposed in front of the brake part and biases the brake part in a direction away from the wheel; and a rear part of the brake part. A pedal part that presses against the urging force of the urging part against the wheel, and an opening through which the rod part can be inserted. A wheel cover that covers the wheel from the rear, and the wheel cover is formed in a concave shape that opens upward or downward in a rear view, and the rod is inserted through the opening, and at both the left and right sides of the wheel, Back exposure A braking device for handling a vehicle which covers a.

According to a second aspect of the present invention, a rod that is attached to a part of the cargo handling vehicle and projects rearward through a pair of left and right wheels of the cargo handling vehicle, and is externally fitted to the rod so as to be slidable in the axial direction. A brake part that can be pressed against the wheel; a biasing part that is disposed in front of the brake part and biases the brake part in a direction away from the wheel; and a rear part of the brake part. A pedal part that presses against the urging force of the urging part against the wheel, and an opening through which the rod part can be inserted. A wheel cover that covers the wheel from the rear, and the wheel cover is formed in a substantially annular shape in a rear view, and the rod is inserted through the opening, and the left and right side portions cover the rear exposed portion of the wheel. Vehicle break It is a device.

  As effects of the present invention, the following effects can be obtained.

  According to a first aspect of the present invention, a rod that is attached to a part of the cargo handling vehicle and projects rearward through a pair of left and right wheels of the cargo handling vehicle, and is externally fitted to the rod so as to be slidable in the axial direction. A brake part that can be pressed against the wheel; a biasing part that is disposed in front of the brake part and biases the brake part in a direction away from the wheel; and a rear part of the brake part. A pedal part that presses against the urging force of the urging part against the wheel, and an opening through which the rod part can be inserted. Since the wheel cover for covering the wheel from behind is provided, the wheel cover can be provided in the brake device with a simple structure. Therefore, in addition to the function of the brake device braking the wheel, the brake device has a function of covering the wheel from the rear, and the workability of the cargo handling vehicle to which the brake device is applied can be improved.

  In addition, since the wheel cover serves as a fender, the foreign matter adhering to the wheel can be prevented from splashing up.

Further, the wheel cover is formed in a concave shape that opens upward or downward in rear view, and the rod is inserted through the opening, and the rear exposed portion of the wheel is covered on both the left and right sides. Can be made relatively small with respect to the left and right wheels, so that the structure of the entire brake device can be simplified, and the production cost of the brake device for a cargo handling vehicle can be reduced.

In the present invention, the wheel cover is formed in a substantially annular shape when viewed from the rear, and the rod is inserted through the opening and the rear exposed portion of the wheel is covered on both the left and right sides. It is possible to cover not only the periphery of the position but also the vicinity of the rear exposed portion of the wheel with a simple structure, and foreign matter can be prevented from entering between the left and right wheels.

The perspective view which shows the whole structure of a pallet truck provided with the brake device which concerns on one Embodiment of this invention. The perspective view which similarly decomposes | disassembles a driving | running | working part and shows a state. The rear view which similarly shows the circumference | surroundings of a driving | running | working part. (A) The side view which shows a rear-axle support member and a rod, (b) Similarly a rear view. (A) The top view which shows a pedal part, (b) Similarly a rear view. (A) Top view which shows a brake part, (b) Similarly back view, (c) Side surface end view which similarly shows the relationship between a pressure contact piece and a wheel cover, and a rear wheel. (A) The top view which shows the state at the time of non-operation of a brake device, (b) The top view which shows the state at the time of the operation of a brake device. (A) The top view which shows the brake part which concerns on another embodiment, (b) Similarly rear view, (c) Side end view which similarly shows the relationship between a pressure contact piece and a wheel cover, and a rear wheel. (A) The top view which shows the brake part which concerns on another embodiment, (b) Similarly top view.

  Next, embodiments of the invention will be described.

  First, the pallet truck 1 which is a cargo handling vehicle provided with the brake device 44 which concerns on one Embodiment of this invention is demonstrated. The cargo handling vehicle is the pallet truck 1 in the present embodiment, but is not particularly limited as long as it is a cargo handling vehicle to which the present invention is applicable. In the following, the direction indicated by the arrow A in the figure is defined as the front, and the front-rear direction is defined. Further, a direction perpendicular to the front-rear direction and the horizontal direction is defined as a left-right direction.

  As shown in FIGS. 1 to 3, the pallet truck 1 is a manually traveling vehicle for transporting a pallet on which luggage is placed in a luggage storage area of a factory or a warehouse. The pallet truck 1 mainly includes a loading platform unit 10, an elevating unit 20, a handle unit 30, and a traveling unit 40. The pallet truck 1 places the pallet on the loading platform 10, moves the loading platform 10 up and down through the lifting unit 20 by operating the handle unit 30, and travels through the traveling unit 40 by operating the handle unit 30. Configured to do.

  As shown in FIG. 1, the loading platform 10 includes a pair of left and right mounting portions 11, 11 formed in a fork shape, and a pallet can be mounted on these mounting portions 11, 11. Front wheels 12 and 12 are mounted on the lower surfaces of the front portions of the mounting portions 11 and 11. A rear frame 13 is erected at the rear end of the loading platform 10. On the upper part of the rear frame 13, a support shaft 14 is arranged with the axial center direction directed in the vertical direction. The support shaft 14 is fixed to the rear end of the rear frame 13 protruding rearward, and is fitted to a ram piston 21 (see FIG. 2) of the elevating unit 20 so as to be rotatable about the axis. The loading platform 10 is configured to be movable up and down by a lifting unit 20 described later.

  The elevating unit 20 is disposed behind the loading platform 10. As shown in FIG. 2, the elevating unit 20 includes a ram cylinder 22 that protrudes upward and slidably accommodates the ram piston 21. As shown in FIGS. 1 to 3, a plunger pump 24 is provided behind the ram cylinder 22. A handle base 25 is provided above the plunger pump 24. The handle base 25 is fixed to the lower end of the connection handle pipe 34 of the handle 30. In accordance with the operation of the handle part 30, the elevating part 20 is actuated by the plunger pump 24 via the handle base part 25, so that the ram piston 21 housed in the ram cylinder 22 is raised and then fitted to the ram piston 21. Further, the loading platform 10 is configured to rise through the support shaft 14.

  The handle part 30 is disposed above the elevating part 20. As shown in FIGS. 1 and 2, a loop-type grip 31 is disposed on the upper portion of the handle portion 30. A lower end of the grip 31 is fixed to an upper end of a connection handle pipe 34 erected on the handle base 25. An operation box 32 is horizontally mounted on the grip 31 in the vertical direction. A release lever 33 is provided on the operation box 32 so as to project rightward. The handle unit 30 causes the pallet truck 1 to travel through the traveling unit 40 by the operator's push-pull operation, operates the lifting unit 20 by the operator's phoneping operation and lift release operation, and moves the platform unit 10 up and down. It is configured to be able to perform operations.

  The traveling unit 40 is disposed below the elevating unit 20 and the handle unit 30. As shown in FIGS. 1 to 3, the traveling unit 40 mainly includes a rear axle support member 41, a rear axle 42, rear wheels (wheels) 43 and 43, and a brake device 44. The rear axle support member 41 is formed in a cylindrical shape, and is fitted on the shaft support portion 22 a that protrudes downward from the ram cylinder 22 of the elevating portion 20. Then, the rear axle 42 extends through the shaft support portion 22a and the rear axle support member 41 so as to extend in the left-right direction, and is supported at the left and right central portions. The left and right rear wheels 43 and 43 are rotatably attached to the left and right end portions of the rear axle 42, respectively, and are disposed on the left and right inner sides of the loading portions 11 and 11 of the loading platform 10 in the rear view of the pallet truck 1. A brake device 44 having a wheel cover 73 is provided on the rear surface side of the rear axle support member 41. By performing a braking operation using the brake device 44, the rear wheels 43 and 43 are braked by the brake device 44, and the parking brake is activated in the pallet truck 1. The traveling unit 40 is configured such that the rear wheels 43 and 43 are rotated by the operation (push and pull operation) of the handle unit 30 by the operator, that is, the pallet truck 1 travels through the traveling unit 40. .

  Next, the brake device 44 of the traveling unit 40 will be described in detail.

  As shown in FIG. 2, the brake device 44 mainly includes a rod 50, a pedal portion 60, a brake portion 70, and a spring 80.

  The rod 50 is a rod-like member formed substantially straight as shown in FIG. 4A, and protrudes rearward from the rear portion of the rear axle support member 41. The rod 50 is divided into a sliding portion 51, a rotating portion 52, and a fastening portion 53 in order from the rear axle support member 41 side at an appropriate interval in the longitudinal (axial center) direction, that is, the front-rear direction. . As shown in FIG. 4B, the sliding portion 51 is formed in a rectangular (substantially square) shape in the rear view. The rotating part 52 is formed in a circular shape when viewed from the back, is coaxial with the sliding part 51, and is arranged on the inner side when viewed from the back. The fastening portion 53 is formed in a substantially circular shape when viewed from the back, and has an external thread formed on the outer peripheral surface thereof. The fastening portion 53 is coaxial with the rotating portion 52 and is disposed on the inner side when viewed from the back.

  As shown in FIG. 5, the pedal portion 60 mainly includes a pedal body portion 61 and left and right step portions 62 and 62. The pedal portion 60 is externally fitted to the rotating portion 52 of the rod 50 so as to be rotatable around the axis.

  The pedal body 61 is a hollow cylindrical member having an axial center in the front-rear direction. A rod hole 61c, which is circular in a rear sectional view, is formed in the axial center portion of the pedal body 61 so as to penetrate in the axial direction, that is, the front-rear direction. The inner diameter of the rod hole 61 c is set slightly larger than the outer diameter of the rotating part 52 of the rod 50. Then, the rotating portion 52 of the rod 50 is inserted into the rod hole 61c so as to be rotatable about the axis. The front end surface 61a and the rear end surface 61b of the pedal body 61 are formed in a substantially vertical surface. As shown in FIG. 5A, pedal-side cam portions 61d and 61d are provided at the front portion of the pedal body portion 61 toward the front. That is, the pedal body 61 is cut out in a substantially trapezoidal shape from the front end surface 61a toward the inside (rear side) of the pedal body 61, and the two cam portions 61d and 61d are loosened to one side in the circumferential direction of the rod hole 61c. The inclined surfaces 61e and 61e are formed so as to be shifted in phase by 180 degrees in the circumferential direction of the rod hole 61c.

  As shown in FIG. 5 (b), the step portions 62 and 62 are substantially plate-like members that the operator steps on with his / her feet (braking operation). It is provided to extend. The left and right step portions 62 and 62 are arranged such that their rear ends are located behind the rear end portion of the pedal body 61 in a state where the upper surface is substantially flat. Below the step portions 62 and 62, a step portion support portion 63 is provided between the step portions 62 and 62 and the pedal main body portion 61, and a connecting portion between the step portions 62 and 62 and the pedal main body portion 61 is reinforced. Is done.

  As shown in FIG. 6, the brake part 70 mainly includes a brake main body part 71 and a pressure contact part 72. As shown in FIG. 2, the brake portion 70 is disposed in front of the pedal portion 60 and is fitted on the sliding portion 51 of the rod 50 so as to be slidable in the axial direction.

  The brake main body 71 is a hollow cylindrical member having an axial center in the front-rear direction. A rod hole 71c that is rectangular in a rear sectional view is formed in the axial center portion of the brake main body 71 so as to penetrate in the axial direction, that is, the front-rear direction. The inner diameter of the rod hole 71 c is set slightly larger than the outer diameter of the sliding portion 51 of the rod 50. The sliding portion 51 of the rod 50 is inserted into the rod hole 71c so as to be slidable in the axial direction.

  The front end surface 71a and the rear end surface 71b of the brake body 71 are formed in a substantially vertical surface. As shown in FIG. 6A, at the rear part of the brake main body 71, cam parts 71d and 71d on the brake main body side are provided from the rear end surface 71b to the rear. That is, the two cam portions 71d and 71d projecting in a substantially trapezoidal shape toward the outside of the brake main body portion 71 are formed with a phase difference of 180 degrees in the circumferential direction of the rod hole 71c. The cam parts 71d and 71d of the brake body part 71 are fitted between the cam parts 61d and 61d of the pedal body part 61 in the pedal part 60, respectively, so as to engage with the cam parts 61d and 61d in the circumferential direction. Configured. A stopper 71e is formed at the lower right side of the brake body 71 so as to protrude rearward from the cam 71d. The stopper 71e stops the tread 62 at a predetermined rotation position by contacting the tread 62 or the tread support 63 when the right tread 62 of the pedal 60 is depressed for a braking operation. Configured as follows.

  The press contact portions 72 and 72 are members that press the outer peripheral surfaces of the rear wheels 43 and 43 to brake the rear wheels 43 and 43. The pressure contact portions 72 and 72 include pressure contact base portions 72a and 72a and pressure contact pieces 72b and 72b, respectively. As shown in FIG. 6A, the pressure contact base portions 72 a and 72 a are provided on the left and right side surfaces of the brake main body 71 so as to protrude outward and rearward. As shown in FIG. 6C, press contact pieces 72b and 72b, which are substantially curved plate-like members, extend outward from the rear ends of the press contact bases 72a and 72a, respectively. Thus, the pressure contact pieces 72b and 72b are connected to the brake main body 71 and the pressure contact base portions 72a and 72a. As shown in FIG. 6C, the pressure contact pieces 72b and 72b are formed substantially concentrically with the rear wheel 43 in a side view. The pressure contact pieces 72b and 72b are provided with a plurality of protrusions 72c, 72c, and 72c on the inner surface thereof, and are configured to be securely pressed against the outer peripheral surface of the rear wheel 43 by the protrusions 72c. In the present embodiment, the three protrusions 72c, 72c, 72c are formed in a rib shape extending in the left-right horizontal direction with the same height, and are arranged at predetermined intervals in the circumferential direction of the pressure contact pieces 72b, 72b in the vertical direction. The

  The wheel cover 73 is a substantially curved plate-like member as shown in FIG. 6C and is formed substantially concentrically with the rear wheel 43 in a side view. As shown in FIG. 6, the wheel cover 73 is attached to the rear side of the pressure contact portions 72 and 72 and covers the rear wheels 43 and 43 from the rear. The wheel cover 73 will be described in detail later.

  As shown in FIG. 2, the spring 80 is a compression spring formed in a coil shape. The spring 80 is disposed between the brake main body 71 and the rear axle support member 41 in front of the brake unit 70 and is fitted onto the sliding portion 51 of the rod 50. Note that the spring 80 is an embodiment of the urging unit, and is not limited to this, and any spring may be used as long as it can urge the brake unit 70 and the pedal unit 60 rearward.

  In the brake device 44 configured as described above, the spring 80, the brake portion 70, and the pedal portion 60 are externally fitted to the rod 50 in order from the rear axle support member 41 side as described above. Then, as shown in FIG. 2, the nut 54 is screwed into the fastening portion 53 of the rod 50 from behind, and the spring 80, the brake portion 70, and the pedal portion 60 are tightened on the rod 50 toward the rear axle support member 41. It is done. As a result, the spring 80 and the brake part 70 are attached rearward (opposite to the rear axle support member 41 side) by the spring 80 in a state where the brake part 70 and the pedal part 60 are in contact with each other. Be forced.

  When no braking operation is performed and the brake device 44 is in an inoperative state, the brake unit 70 and the pedal unit 60 are moved rearward along the rod 50 by the biasing force of the spring 80 as shown in FIG. The cam portions 71d and 71d of the brake portion 70 are fitted between the cam portions 61d and 61d of the pedal body 61 in the pedal portion 60, and the cam portions 61d and 61d of the pedal portion 60 Engage in the circumferential direction. Therefore, the pressure contact pieces 72b and 72b of the brake unit 70 are held in a state of being separated from the rear wheels 43 and 43, so that the rear wheels 43 and 43 can rotate, and the pallet truck 1 can travel.

  On the other hand, when a braking operation is performed and the brake device 44 is in an activated state, the right step portion 62 of the pedal portion 60 is first depressed. By this depression, the pedal portion 60 rotates on the rod 50 about the axis (clockwise in the rear view) and rotates until the step portion 62 or the step portion support portion 63 comes into contact with the stopper 71e. At this time, as shown in FIG. 7B, the cam portion 71d of the brake portion 70 is pushed by the cam portion 61d of the pedal portion 60, that is, moves forward along the gentle slope 61e, and the front end of the pedal portion 60 It reaches a position where it contacts the surface 61a. Here, since the rear end surface 61 b of the pedal part 60 is in contact with the fixed nut 54, the brake part 70 resists the urging force of the spring 80 and the longitudinal length of the cam part 71 d of the brake body part 71. Then, it slides forward (rear axle support member 41 side). As a result, the inner surfaces (protrusions 72c, 72c, 72c) of the pressure contact pieces 72b, 72b of the brake unit 70 are pressed against the outer peripheral surfaces of the rear wheels 43, 43 to brake the rear wheels 43, 43, and are parked in the pallet truck 1. The brake is activated.

  Further, when releasing the braking operation in order to change the brake device 44 from the operating state to the non-operating state, if the pedal unit 60 depresses the left side step unit 62 on the opposite side of the pedal unit 60, the pedal unit 60 is connected to the rod. 50, the cam parts 71d and 71d of the brake part 70 are fitted between the cam parts 61d and 61d of the pedal body part 61 in the pedal part 60. The cam portions 61d and 61d of the pedal portion 60 are engaged in the circumferential direction, and when the engagement is completed, the rotation of the pedal portion 60 is stopped. As a result, the brake unit 70 slides rearward (opposite to the rear axle support member 41) by the urging force of the spring 80, and the pressure contact pieces 72b and 72b are separated from the rear wheels 43 and 43, so that the rear wheels 43 and 43 are separated. Is released.

  Next, the wheel cover 73 will be described in detail.

  As described above, the wheel cover 73 is a substantially curved plate-like member, and is formed substantially concentrically with the rear wheel 43 in a side view, and is exposed to the rear on the outer peripheral surface of the rear wheels 43. As shown in FIG. 3, when the traveling unit 40 is viewed from the back side, a part or all of the visible part (hereinafter referred to as “rear exposed part”) of the rear wheels 43 and 43 is covered. Provided. As shown in FIG. 6B, the wheel cover 73 is formed in a substantially concave shape that opens upward in a rear view. Specifically, the wheel cover 73 includes right and left covering parts 73a and 73a that are located right behind the rear wheels 43 and 43, and a connecting part 73b that connects the lower parts of the covering parts 73a and 73a. And formed. Then, as shown in FIG. 2, the rod 50 protruding rearward and a part of the pedal portion 60 thereon are formed in the opening 73 c formed above the connecting portion 73 b between the covering portions 73 a and 73 a. It is inserted.

  In the wheel cover 73, the vertical width of the covering portions 73a and 73a is set to approximately half the vertical width of the rear wheel 43 as shown in FIG. However, the vertical width of the covering portions 73a and 73a is not particularly limited, and may be set to be substantially the same as the vertical width of the rear wheel 43, for example. The left and right width of the wheel cover 73 is set slightly longer than the width of the traveling unit 40, that is, the width between the outermost sides of the left and right rear wheels 43 and 43. In addition, the left and right widths of the covering portions 73 a and 73 a are set to be slightly larger than the left and right width of the rear wheel 43. In the present embodiment, the opening 73c opens upward, but may open downward.

  The wheel cover 73 is attached to the pressure contact parts 72 and 72 of the brake part 70 as shown in FIG. Specifically, the front sides of the covering portions 73a and 73a that are the left and right sides of the opening 73c in the wheel cover 73 are welded to the rear side of the pressure contact pieces 72b and 72b in the pressure contact portions 72 and 72, respectively. It is fixed. In this embodiment, the wheel cover 73 is integrally attached to the press contact portions 72 and 72 of the brake unit 70 by welding, but the wheel cover 73 is integrally formed with the press contact portions 72 and 72 by casting. May be. That is, you may comprise the brake part 70 and the wheel cover 73 integrally. If comprised in this way, a number of parts can be reduced and the manufacturing cost of the brake device 44 can be reduced.

In addition, the wheel cover 73 is fixed to the pressure contact portions 72 and 72 by welding in the present embodiment, but is not limited thereto, and can be fixed using screws, bolts, or the like.
For example, when a bolt is used when the wheel cover 73 is fixed to the press contact portions 72 and 72 as shown in FIG. 9, the wheel cover 73 is arbitrarily provided to the covering portions 73 a and 73 a on both the left and right sides of the opening 73 c. In this embodiment, two long holes 73d and 73d are formed. The two long holes 73d and 73d are arranged at an appropriate interval from each other with the longitudinal direction being the vertical direction in a state of passing through the covering portions 73a and 73a in the front-rear direction.

  From the outer peripheral surfaces of the pressure contact pieces 72b and 72b, bolts 72d, 72d,... Protrude rearward in accordance with the positions of the long holes 73d, 73a, etc. of the covering portions 73a, 73a in the wheel cover 73. . Then, the long holes 73d, 73d,... Of the covering portions 73a, 73a are inserted into the bolts 72d, 72d, and screwed by the nuts 74, 74,. Thus, the wheel cover 73 is fixed to the press contact portions 72 and 72.

  With such a configuration, the wheel cover 73 can be attached to and detached from the press contact pieces 72b and 72b by removing the nuts 74 and 74 at the left and right covering portions 73a and 73a. Therefore, when the pressure contact pieces 72b and 72b are worn out, the wheel cover 73 is deformed, or when necessary, the wheel cover 73 can be replaced with one having a different shape or size. The pallet truck 1 can be run while being removed from the pressure contact pieces 72b and 72b. Further, the wheel cover 73 is moved by moving the wheel cover 73 in the vertical direction along the long holes 73d by loosening the nuts 74, 74 at the left and right covering portions, and adjusting the vertical position of the wheel cover 73 before pressing the pressure contact piece. 72b and 72b can be fixed. That is, the vertical position of the wheel cover 73 can be changed according to the unevenness of the traveling surface, surrounding obstacles, and the like.

  Next, the brake part 170 of the brake device which concerns on another embodiment of this invention is demonstrated in detail using FIG. Since the brake unit 70 of the brake device 44 has substantially the same configuration except for the wheel cover 173, the same reference numerals are given to the portions, and the description thereof is omitted.

  In the brake part 170, the wheel cover 173 is formed of a substantially curved plate-like member as with the wheel cover 73 as shown in FIG. 8C, and is provided so as to cover the rear exposed parts of the rear wheels 43 and 43. . As shown in FIG. 8B, the wheel cover 173 is formed in a substantially annular shape when viewed from the back. Specifically, the wheel cover 173 includes a rectangular covering portion 173a and 173a in the right and left rear view located immediately behind the left and right rear wheels 43 and 43, and an upper portion and a lower portion of the left and right stomach portions 173a and 173a, respectively. And connecting portions 173b and 173b to be connected. Then, the rod 50 and a part of the pedal portion 60 thereon are inserted through the opening 173c formed by the covering portions 173a and 173a and the connecting portions 173b and 173b.

In this wheel cover 173, the vertical widths of the covering portions 173a and 173a are substantially the same as the vertical widths of the rear wheels 43 and 43, or smaller than the vertical widths of the rear wheels 43 and 43 as shown in FIG. Is set. However, the vertical width of the covering portions 173a and 173a is not particularly limited as long as the opening 173c is formed together with the connecting portions 173b and 173b.
The wheel cover 173 is attached to the pressure contact parts 72 and 72 of the brake part 170 as shown in FIG. Specifically, the front sides of the cover portions 173a and 173a, which are the left and right sides of the opening 173c in the wheel cover 173, are welded to the rear side of the pressure contact pieces 72b and 72b in the pressure contact portions 72 and 72, respectively. It is fixed.

  As described above, the brake device 44 of the pallet truck 1 is attached to a part of the pallet truck 1, in this embodiment, the shaft support 22 a of the ram cylinder 22 of the elevating unit 20 and the rear axle support member 41. A rod 50 that protrudes rearward through a pair of left and right rear wheels (wheels) 43 and 43 of the truck 1 and is externally fitted to the rod 50 so as to be slidable in the axial direction. A brake portion 70 that can be pressed by pressure contact portions 72 and 72 from the side, and a spring 80 that is disposed in front of the brake portion 70 and biases the brake portion 70 away from the rear wheels 43 and 43, that is, rearward. The brake unit 70 is disposed behind the brake unit 70, and the brake unit 70 is slid forward along the rod 50 against the urging force of the spring 80. A wheel cover that has a pedal portion 60 that is pressed against 43 and an opening 73c (173c) through which the rod 50 can be inserted, and that is attached to the rear side of the brake portion 70 and covers the wheels 43 and 43 from the rear. 73 (173).

  With this configuration, the wheel cover 73 can be provided in the brake device 44 with a simple structure. Accordingly, the brake device 44 has a function of covering the rear wheels 43 and 43 from the rear in addition to the function of braking the rear wheels 43 and 43, and the workability of the pallet truck 1 to which the brake device 44 is applied is improved. can do. Further, the wheel cover 73 serves as a fender, so that the foreign matter adhering to the rear wheels 43 and 43 can be prevented from splashing up. Further, it is possible to prevent the rear wheels 43 and 43 from hitting an obstacle or the rear wheels 43 and 43 from crushing the obstacle.

  The wheel cover 73 is formed in a concave shape that opens upward or downward in the rear view, and the rod 50 is inserted through the opening 73c, and the rear exposed portion of the wheel is covered at the left and right sides. .

  By configuring in this way, the wheel cover 73 can be formed relatively small with respect to the left and right rear wheels 43, 43, the structure of the entire brake device 44 can be simplified, and the brake device of the pallet truck 1 can be simplified. 44 production cost can be reduced

  The wheel cover 173 is formed in a substantially annular shape when viewed from the rear, and the rod 50 is inserted through the opening 173c and covers the rear exposed portions of the rear wheels 43 and 43.

  With this configuration, it is possible to cover not only the vicinity of the stepping position of the pedal portion 60 but also the vicinity of the rear exposed portions of the rear wheels 43 and 43 with a simple structure, and the left and right rear wheels 43 and the rear wheels can be covered. It is possible to prevent foreign matter from entering the space 43.

1 Pallet truck 40 Traveling part 41 Rear axle support member 43 Rear wheel (wheel)
44 Brake device 50 Rod 54 Bolt 60 Pedal part 62 Step part 70 Brake part 72 Pressure contact part 72b Pressure contact piece 73 Wheel cover 80 Spring

Claims (2)

A rod that is attached to a part of the cargo handling vehicle and protrudes rearward through a pair of left and right wheels of the cargo handling vehicle, and is externally fitted to the rod so as to be slidable in the axial direction, and can be pressed against the wheels A brake part, a biasing part arranged in front of the brake part and biasing the brake part in a direction away from the wheel, and a rear part of the brake part, the brake part being placed in the biasing part A wheel that has a pedal part that presses against the wheel against the urging force and an opening through which the rod part can be inserted, and that is attached to the rear side of the brake part and covers each wheel from behind And the wheel cover is formed in a concave shape that opens upward or downward in a rear view, and the rod is inserted through the opening, and the rear exposed portion of the wheel is covered on the left and right sides. With features The brake system of the cargo-handling vehicle that. A rod that is attached to a part of the cargo handling vehicle and protrudes rearward through a pair of left and right wheels of the cargo handling vehicle, and is externally fitted to the rod so as to be slidable in the axial direction, and can be pressed against the wheels A brake part, a biasing part arranged in front of the brake part and biasing the brake part in a direction away from the wheel, and a rear part of the brake part, the brake part being placed in the biasing part A wheel that has a pedal part that presses against the wheel against the urging force and an opening through which the rod part can be inserted, and that is attached to the rear side of the brake part and covers each wheel from behind And the wheel cover is formed in a substantially annular shape in a rear view, and the rod is inserted through the opening, and the rear exposed portion of the wheel is covered at both the left and right sides. Brake equipment .

Images