JPH0131443Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a safety device for a travel control lever for operating a material transport vehicle.

There are two types of lumber trucks that attach and feed lumber to the sawmill that saws and splits the lumber: those that automatically move forward, reverse, and stop remotely, and those that operate these operations manually. In the latter case, forward movement, backward movement, and stopping are carried out simply by tilting the operating lever to the left or right from the neutral position, and a safety device is installed to prevent danger from carelessly operating the operating lever. ing. However, conventional safety devices have a lever attached to the side of the operating rod, and are released by grasping this lever toward the operating lever. Ta.

This invention aims to eliminate the above-mentioned drawbacks, and consists of a hollow rod that is pivotally supported on a support shaft provided at the bottom of the housing and that protrudes so that it can be tilted along the guide hole of the housing. and a connecting rod that is movable in the axial direction within the rod and has a horizontal shaft at both ends that has a ring protruding from the circumferential surface of the rod at its lower end;
A grip body fixed to the upper end of the rod, a grip body fixed to the upper end of the connecting rod passing through this grip body, and a pressing spring provided between these two grip bodies, and this spring constantly pushes the connecting rod upward. A pair of locking holes are provided in the upper part of the housing to lock the rod in the neutral position by locking the wheels respectively, and a boss is provided in the lower part of the rod to support the rod on the support shaft. a link rod for operating the material transport vehicle connected to a mounting arm, and a pair of link rods facing each other and pivoted upward to a pair of mounting arms projecting diagonally downward from the boss; A material transport vehicle characterized in that a return tension spring is provided between both link rods in the middle of the link rods, and a rod body is provided at the upper end of each of the link rods and elastically contacts the rod body in a state perpendicular to the rod body. It provides an operating lever safety device. This invention will be described in detail below with reference to an example shown in the figure.

Figures 1 and 2 show a material transport vehicle 1 equipped with the operating rod safety device of this invention. 2 is a vehicle frame, below which are a plurality of wheels 3, and above is a material clamping vehicle. multiple head blocks 4
A step 5 on which an operator rides, an operation panel 6 for cutting and cutting the material, and an operation rod 7 for moving the material transport vehicle forward, backward, and stopping are attached to one end of the vehicle frame. There is.

As shown in FIGS. 3 and 4 a and b, the safety mechanism of this operating rod has an arc circle with a radius centered on a support shaft (described later) at the top, and a guide hole 9 in the arc length direction in the center. Side plates 12a, 1 of a housing 8 having a cap body portion 11 provided with a locking hole 10 orthogonal to the center of the guide hole
Attach bearings 13a and 13b to 2b with screws 14,
A support shaft 15 is installed horizontally between both bearings. This spindle 1
5, the boss 16 is locked with the key 17, and one end of the hollow rod 18 is fixed with the screw 19. This rod 18 projects outward from the guide hole 9 as shown in FIGS.
A shaft 22 attached to a sliding member 21 provided inside the hole protrudes from the hole, and at both ends of this shaft are wheels 23a and 23b that enter and exit the locking hole 10 by a mechanism to be described later. It is rotatably mounted. Further, one end of a connecting rod 24 is attached to the sliding member 21 as shown in FIG. 4b, and the other end is attached to a rod 18 as shown in FIGS. 3 and 4b.
A hemispherical grip body 25 attached to the other end
It protrudes outward through a hole 26 made in the center of the grip, and a grip body 25b, which is paired with the grip body 25a, is fixed to the upper end of the grip body. A spring 27 that applies a force to pull the moving member 21 upward is fitted in annular recesses 28a and 28b formed in the dividing surfaces of the grip bodies 25a and 25b.

As shown in FIGS. 4a and 4b, the boss 16 has mounting arms 29 and 30 installed directly below the boss and at an angle of approximately 45 degrees from the boss.
A, 30b are provided in a protruding manner, and a link rod 31 attached to the operated part is pivotally supported on the mounting arm 29 by a shaft 33 via a mounting member 32, and the mounting arms 30a, 30b have approximately U-shaped shaped link rod 34a,
One end of 34b is pivotally connected with support bolts 35a, 35b, and the other end is a rod 36a, which is orthogonal to the rod 18.
36b is removed, and a return spring 37 attached to the center applies a force to the link rods 34a, 34b to rotate in opposite directions about the pivot point, and the rods 36a, 36b are rotated as rods. 18 and side plate 1
It is in pressure contact with a locking protrusion 37' having the same width as the diameter of the rod and protruding from the center of 2a. 38 is the side plate 12
In the attachment part provided on the a side, 39 is another operating part attached to the rod body 18.

The operating rod safety device of this invention is constructed as described above, and the operation of this device will be explained below.

4a and 4b are in a stopped state, the rod 18 is in a vertical state, the grip body 25b is elastically pushed by a spring 27, and this elasticity causes the shaft 22 attached to the sliding member 21 connected by a connecting rod 24 to has risen until it touches the upper edge of the elongated hole 20, and in this state the wheel 2
Since the rods 3a and 23b protrude into the locking hole 10, the rod 18 is located at the center of the guide hole 9 and does not move in any direction with only a slight play.

Next, in order to move the rod 18 from this state, the grip 25b is pushed down against the elasticity of the spring 27 as shown in FIGS. When the shaft 22 attached to this sliding member descends until it touches the lower edge of the elongated hole 20, the wheels 23a, 23b
escapes from the locking hole 10 and enters a standby state in which it can move in any direction in the guide hole 9 from the neutral position. FIG. 6 shows a state in which the rod 18 is tilted clockwise with the grip body 25b pressed after going through the standby state described above. In this case, as the rod 18 rotates clockwise, the end of the link rod 34b Since the rod 36b is in contact with the rod 18, only the link rod 34b tilts clockwise together with the rod against the elasticity of the return spring 37, and the link rod 31
The link rod 34a is pushed out to the left, and the link rod 34a is the rod body 36a.
Since it is in contact with the locking protrusion 37', the standby state described above is maintained.

FIG. 7 shows a completely opposite state to that described in FIG. 6, in which the rod 18 is tilted counterclockwise after the standby state or the rotation operation in the direction of the rod.

Next, with this rod 18 tilted counterclockwise (the same applies hereafter when tilting clockwise), return the rod 18 to the neutral position and remove the force pushing the grip body 25b, or remove your hand altogether, and the link will be linked. Since the rod 34a is rotated clockwise by the return spring 37, the rod 18 is pushed by the rod 36a and returned to the neutral position, and stops when it hits the rod 36b of the link rod 34b, and the inner surface of the cap body 11 At the neutral position, the wheels 23a and 23b, which have moved together with the rod 18 while in contact with the rod 18, enter the locking hole 10 and stop as shown in FIGS. .

As described above, this invention consists of a hollow rod 18 that is pivotally supported on a support shaft 15 provided at the bottom of the housing 8 and that protrudes so that it can be tilted along the guide hole 9 of the housing 8.
and a continuous rod 24 which is movable in the axial direction within the rod 18 and has a horizontal shaft 22 at both ends thereof having wheels 23a and 23b protruding from the circumferential surface of the rod 18 at the lower end, and the rod 18. A grip body 25a fixed to the upper end, and a grip body 25b fixed to the upper end of the connecting rod 24 passing through this grip body 25a.
A pressing spring 27 is provided between the two grip bodies 25a and 25b, and the spring 27 constantly pushes the connecting rod 24 upward, so that the wheels 23a and 2
A pair of locking holes 10 and 10 are provided in the upper part of the housing 8 for locking the rod 18 at the neutral position by locking the rods 3b and 3b respectively, and a pair of locking holes 10, 10 for pivotally supporting the lower part of the rod 18 on the support shaft 15. A link rod 31 for operation of the material transport vehicle 1 is connected to a mounting arm 29 provided on the boss 16, and a pair of mounting arms 30a and 30b are provided on the boss 16 and project diagonally downward, respectively, facing each other. A pair of link rods 34a, 34b pivoted upward, and these link rods 34a, 3
A return tension spring 37 is provided between the link rods 34a and 34b in the middle of the link rod 4b, and a rod body 1 is provided at the upper end of each of the link rods 34a and 34b.
The rod body is provided with rod bodies 36a and 36b which are in elastic contact with the rod body at right angles to the rod body 8, respectively, so that when the grip is not pressed, the rod body can be locked in the neutral position by fitting the wheel body into the locking hole. Therefore, when you release your hand from the rod, it automatically returns to the neutral position and is locked, and the lock cannot be released unless you push the grip downwards, making it safe.Since it is operated by pushing the grip, it is easy to operate, and the mechanism is also good. It has advantages such as simplicity.

[Brief explanation of the drawing]

Each of the figures shows an embodiment of this invention. Fig. 1 is a side view of a material transport vehicle equipped with the operating rod safety device of this invention, Fig. 2 is a perspective view of the operating rod mounting part, and Fig. Figure 3 is a side view of the operating rod grip;
Figure a is a front view of the safety device in a stopped state with a part of the housing removed, Figure 4b is a cross-sectional view taken along line A-A in Figure 4a, and Figure 5a is a partial view of the housing. Figure 5b is a front view of the removed safety device in the standby state, Figure 5b is a sectional view taken along line B-B in Figure 5a, and Figure 6 is a partial view of the casing with the operating lever tilted to the right. FIG. 7 is a front view of the safety device with the operating lever tilted to the left, with a portion of the casing removed. 7... Operating rod, 8... Housing, 9... Guide hole, 10... Locking hole, 11... Cap body portion, 12a, 12b... Side plate, 1
3a, 13b...Bearing, 15...Spindle, 16...Boss,
18... Rod, 20... Long hole, 21... Sliding member, 23
a, 23b...ring body, 24...connection rod, 25a, 25b
...Grip body, 27, 37...Spring, 31,
34a, 34b...link rods.

Claims (1)

[Scope of utility model registration request] A hollow rod 18 is pivotally supported on a support shaft 15 provided at the bottom of the housing 8 and is provided protrudingly so as to be tiltable along the guide hole 9 of the housing 8, and is movable in the axial direction within the rod 18. Moreover, a continuous rod 24 is provided with a horizontal shaft 22 having rings 23a and 23b at both ends thereof, which are protruded from the circumferential surface of the rod 18 at the lower end thereof, and the rod 18.
A grip body 25a fixed to the upper end, a grip body 25b fixed to the upper end of the connecting rod 24 passing through this grip body 25a, and both grip bodies 25.
A housing for locking the rod 18 in a neutral position by a pressing spring 27 provided between a and 25b and the spring 27 constantly pushing the connecting rod 24 upward to lock the wheels 23a and 23b, respectively. A pair of locking holes 10, 10 provided at the top of 8.
and a link rod 31 for operating the material transport vehicle 1 connected to a mounting arm 29 provided on the boss 16 for pivotally supporting the lower part of the rod 18 on the support shaft 15; A pair of mounting arms 3
A pair of link rods 34a, 34b pivoted upward facing each other at 0a, 30b, a return tension spring 37 provided between both link rods 34a, 34b in the middle of these link rods 34a, 34b, Rods 36a, 36b are provided at the upper ends of the link rods 34a, 34b, respectively, and are in elastic contact with the rod 18 in a state perpendicular to the rods 18.
An operating rod safety device for a material transport vehicle, characterized in that each rod is provided with a locking protrusion 37' for abutting against the opposing surface of the rod 36a, 36b to limit movement of the rods 36a, 36b in the direction of these opposing surfaces. .